CB6 steam turbine operation method

This post was last edited by zgj2405 on 2011-7-23 18:17 Steam Turbine Operation Regulations 1 Scope 1.1 This regulation stipulates the basic principles of steam turbine post production, process flow, normal process and technical conditions, causes and treatment of abnormal phenomena, production control items, raw materials, power consumption and safety precautions. 1.2 This regulation is applicable to the production technology and theoretical guidance of steam turbine positions. 2 Normative reference document "Technical Standard for Power Generation Enterprises" 3. Process parameter serial number Item unit value 1 Rated speed r/min3000 2 Critical speed r/min1836 3 Synchronizer high limit speed r/min3180 4 Emergency safety device operating speed r/min3270~3360 5 Voltage regulator operating speed r/min3150 6 Axial displacement allowable value mm forward: 1.4 Reverse: 0.6 7 Steam pressure in front of main steam valve MPa 3.43 +0.196 -0.296 8 Steam temperature in front of main steam valve ℃ 435 +10-15 9 Extraction steam pressure MPa 0.9811 +0.294 -0.196 10 Exhaust steam pressure MPa 0.4901 +0.294 -0.196 11 Extraction steam temperature ℃ 310 12 Exhaust steam temperature ℃ 241 13 Lubricating oil pressure MPa0.0785～0.118 14 Speed regulating oil pressure MPa0.92 15 Main oil pump inlet oil pressure MPa0.05 16 Maximum allowable vibration at turbine bearing mm0.05 4 Specifications and performance of steam turbine The electrical load and thermal load of this unit cannot be adjusted at the same time. When the unit operates according to the electric load, the two voltage regulators should stop working. The heat load at this time is determined by the electric load. The unit can be connected to the grid or run in isolation. When the unit operates according to the thermal load, it needs to be connected to the grid and controlled by the voltage regulator. At this time, the electrical load is determined by the thermal load. 4.1 Steam turbine body specifications 4.1.1 Main technical data Product code D725 Product model CB6-3.43/0.981/0.490 Rated power/maximum power KW6000 Rated speed r/min3000 Rotation direction is clockwise when viewed from the direction of the machine head Rated steam inlet pressure and variation range MPa (absolute) 3.43 +0.196-0.294 Rated intake steam temperature and variation range ℃ 435 +10-15 Rated intake steam volume/maximum intake steam volume t/h76/93.8 Rated extraction steam pressure and adjustment range MPa (absolute) 0.981 +0.294-0.196 Rated extraction steam temperature ℃310 Rated extraction steam volume/maximum extraction steam volume t/h30/45 Rated exhaust steam pressure and adjustment range MPa 0.490 (Absolute) +0.196-0.098 Exhaust steam temperature under rated operating conditions ℃241 Guaranteed steam consumption rate under rated operating conditions kg/kw·h12.287 Critical speed r/min1820 Vibration value at rated speed mm≤0.15 Vibration value at full amplitude critical speed mm≤0.15 Full amplitude steam turbine body weight t24 Maximum piece weight during turbine installation t9 Maximum piece weight during turbine maintenance t9 Rotor weight t2.152 Steam turbine overall dimensions (above the operating platform) m4.5154×2.500×2.645 Steam turbine center elevation (distance from the operating platform) m0.75 4.1.2 Speed swing value of the regulating system and oil system r/min≦±15 Speed droop %4.5±0.5 Speed regulation retardation rate%≦0.5 Extraction pressure droop%10 Extraction steam pressure regulation retardation rate %≦2 Exhaust steam pressure non-uniformity rate %20 Exhaust steam pressure regulation retardation rate %≦2 No-load synchronizer speed regulation range %-4～+6 Main oil pump pressure increase MPa0.883 Difference between the pulse oil pressure of route I and main oil pump inlet oil pressure MPa0.294 Difference between pulse oil pressure of route II and main oil pump inlet oil pressure MPa0.294 Emergency breaker operating speed r/min3300~3360 Rotor relative displacement value when axial displacement safety device is activated mm0.7 Lubricating oil pressure MPa0.0785~0.118 Turbine oil grade HU20 4.1.3 Setting value Extraction safety valve operating pressure MPa1.275~1.295 (table) Exhaust steam safety valve operating pressure MPa0.687~0.706 (table) Extraction steam pressure low limit alarm MPa0.638 (table) Main oil pump outlet pressure when the high-pressure electric oil pump automatically starts up (table) Main oil pump outlet pressure when the high-pressure electric oil pump automatically shuts down MPa (table) Main oil pump outlet pressure when the turbine oil pump automatically starts up MPa0.645 (table) When the turbine oil pump automatically shuts down, the main oil pump outlet pressure MPa0.744 (table) Control the oil pressure when the axial displacement interrupter is in the normal position MPa~0.5 (table) Control the oil pressure when the axial displacement interrupter operates MPa0.245 (table) Lubricating oil pressure reduction protection alarm MPa0.055 (table) Low-pressure electric oil pump input MPa0.04 (table) Shutdown MPa0.03 (table) Electric cranking must not be put into MPa <0.015 (table) Bearing temperature rise protection alarm ℃ 65 (return oil temperature) ℃ 85 (bearing metal temperature) Shutdown ℃ 70 (return oil temperature) ℃ 100 (bearing metal temperature) 4.1.4 Main auxiliary equipment Main oil pump number 1 Pressure increase MPa0.883 Flow rate 1/min540 High-pressure electric oil pump model KCB-633-2 Number of units 1 Pressure (lift) Mpa0.8 Flow m3/h30 AC auxiliary oil pump model CHY-18 Number of units 1 Pressure MPa0.353 Flow m3/h20.5 DC auxiliary oil pump model 2cy-3.3 Number of units 1 Pressure MPa2.5 Flow m3/h1.08 Number of turbine oil pumps 1 Working steam pressure MPa0.785～1.18 Working steam temperature ℃419 Rotation speed r/min6000 Pressure MPa0.54 Flow rate m3/h24 Number of oil injectors (Ⅰ) 1 Outlet oil pressure MPa0.0687 Number of oil injectors (Ⅱ) Outlet oil pressure MPa Oil cooler type YL-12.5-1 Number of units 2 Cooling area ㎡12.5 Cooling oil volume 1/min Cooling water volume t/h36 Cooling water temperature ℃33 Water resistance H2O mm1156 Cooling pipe material H68-2 Cooling pipe specification mmΦ12×1 Oil tank volume M31.6 Vacuum degree on oil surface MPa Range hood model number Steam seal heater type YL-12.5-1 Number of sets 1 Heat transfer area m220 Water side pressure MPa0.981 Cooling water volume t/h50 Air extractor working steam parameters pressure MPa0.589～1.18 Temperature ℃260～435 Flow rate kg/h36 Cooling pipe material H68 Cooling pipe specification mmΦ15×1 Name Model Specification and Technical Data Air Cooler KRW-180N=240KW Water consumption 60t/h Maximum allowable pressure 0.2MPa Maximum inlet water temperature 33℃ Temperature and pressure reducing device WYO2-017MXQ=70t/h P1=3.82Mpa t1=450℃P2=0.5 Mpa t2=180℃PS =6.0 Mpa ts=105℃ Temperature and pressure reducing device WY01-003MXQ=15t/h P1=3.82Mpa t1=450℃ P2=1.0 Mpa t2=180℃ PS=6.0 Mpa ts=105℃ Temperature reducing device WO8-011MXQ=70t/h P=0.491Mpat1=241℃ t2=180℃ PS=6.0 Mpa ts=105℃ Temperature reducing device WO8-011MXQ=15t/h P=0.98 Mpat1=310℃ t2=180℃PS=6.0 Mpa ts=105℃ 5 Start-up, normal maintenance and shutdown of steam turbine and its auxiliary equipment 5.1 Preparation before start-up 5.1.1 After receiving the start-up order, the driver on duty shall notify the co-driver to carefully check the steam turbine and various ancillary equipment, contact the electrical on-duty, and test the electrical equipment and motor insulation to ensure that the equipment is in good condition. 5.1.2 Clean the site equipment, prepare listening sticks, wrenches, flashlights and other tools, and notify the boiler, laboratory personnel and electrical personnel of the start-up time. 5.1.3 Fill in the content of the work ticket and relevant precautions. 5.1.4 Inspection of circulating cooling water system: (1) Circulating cooling water pump ； (2) Pool water level ； (3) Circulating cooling equipment. 5.1.5 Check the oil system: 5.1.5.1 The oil pipelines and all equipment in the oil system should be in good condition, and there should be no oil leakage in the oil system. 5.1.5.2 The oil level in the tank is normal, the oil quality is good, and the float of the oil level indicator moves flexibly. 5.1.5.3 The throttle drain valves of the fuel tank and oil cooler must be closed tightly and are strictly prohibited from being opened. 5.1.5.4 The inlet and outlet throttle of the oil cooler is open, and measures are taken to prevent misoperation. The inlet and outlet throttle of the backup oil cooler is closed. 5.1.5.5 The inlet and outlet valves of the electric oil pump are opened. 5.1.5.6 When cleaning the pipeline, the temporary filter or blocking plate added in front of each bearing must be removed. 5.1.6 Check the soda and water system: 5.1.6.1 The electric isolation valves of the main steam pipeline, extraction steam pipeline and back-pressure exhaust pipeline should be inspected by manual and electric switches in advance. 5.1.6.2 The isolation valve, main steam valve, extraction check valve, and safety valve on the main steam pipeline, extraction steam pipeline, and back-pressure exhaust steam pipeline are closed, and the direct drain valve and the empty exhaust valve are opened. ； The direct drain door on the cylinder opens. 5.1.6.3 The steam valve on the signal pipe of the pressure regulator is closed and the exhaust air valve is opened. 5.1.6.4 The steam door of the steam seal pipeline leading to the steam seal heater is opened, the drain door of the steam seal heater is opened, and the steam door of the steam seal extractor is closed. 5.1.6.5 Each steam line should be able to expand freely. 5.1.6.6 The main cooling water door of the oil cooler is opened, the water inlet door of the oil cooler is closed, and the water outlet door is opened. 5.1.6.7 The steam valve on the steam pipeline of the turbine oil pump is closed, and the exhaust valve and drain valve of the turbine oil pump are opened. 5.1.7 Check the regulation security system : 5.1.7.1 The regulator, regulating steam valve and connecting rod move freely. 5.1.7.2 Adjust the lubrication of each rotating fulcrum on the steam valve connecting rod. 5.1.7.3 Whether the steam pulse chamber of the regulator is filled with distilled water (operating according to the thermal load). 5.1.7.4 Whether each security device is in the disconnected position. 5.1.8 Check the sliding pin system. There should be a gap and no jamming in the cold state. If there is a sliding oil groove on the front seat frame, lubricating oil should be filled with pressure. 5.1.9 Check that all instruments and security signaling devices are intact and put into operation. 5.1.10 Open the valves on the pulse pipelines leading to each instrument. 5.1.11 After passing the inspection, report to the duty leader, and after obtaining permission, notify the boiler to supply steam and heating pipes at different locations. 5.2 Warm the pipe (in front of the isolation valve), start the auxiliary oil pump, and check the regulating and security system in a static state. 5.2.1 Warm the main steam pipeline and the turbine oil pump steam pipeline in front of the isolation valve at the same time. Gradually increase the pressure in the pipeline to 0.2~0.3MPa (meter) (2~3atg. After warming the pipe for 20~30 minutes, increase the pressure to 0.1~0.15MPa (meter)/min (1~1.5atg/min). The pressure rise speed rises to normal pressure, and the steam temperature rise speed does not exceed 5℃/min. 5.2.2 During the pipe heating process, attention should be paid to checking whether steam comes out of the anti-corrosion door. When steam comes out, the isolation valve and bypass valve should be checked and closed tightly to prevent steam from leaking into the cylinder during pipe heating. 5.2.3 After the pressure in the pipeline rises to normal pressure, pay attention to gradually opening the main steam valve in front of the isolation valve until it is fully open. 5.2.4 During the pressure boosting process, check the pipeline expansion and support and lifting conditions. 5.2.5 Start the low-pressure electric oil pump and check: 5.2.5.1 Lubricating oil pressure and bearing oil flow. 5.2.5.2 Oil circuit tightness. 5.2.5.3 Fuel tank level. When starting up for the first time after new installation or overhaul, the necessary amount of oil should be prepared in advance to prepare for replenishing the oil tank after the oil pipe is filled with oil. 5.2.6 Start the high-pressure electric oil pump to check the oil system, and then: 5.2.6.1 Start turning device: (a) Check the rotation direction of the turning motor and stop the motor ； (b) Rotate the handwheel on the cranking motor and at the same time turn the cranking handle counterclockwise to the "engagement" position to start the cranking ； (c) When putting into electric cranking, the lubricating oil inlet cock should be opened. 5.2.6.2 Hang the security device on the gate. (a) Rotate the regulator start valve handwheel to open the regulating steam valve. (b) Rotate the main steam valve control seat handwheel, open the main steam valve to 1/3 of the stroke, then activate each safety device respectively, and check whether the main steam valve, regulating steam valve, and extraction check valve are closed quickly. (c) After passing the inspection, re-attach the security devices and connect the high-pressure oil circuit. (d) Rock the synchronizer to the lower limit position and put the voltage regulator switch in the "cut off" position. (e) Check whether the main steam valve and regulating steam valve are tightly closed. 5.2.7 Or start the turbine oil pump (when the oil system is equipped with a turbine oil pump), repeat the above processes (1) to (7). The turbine oil pump should be warmed up at low speed for 10 minutes, and then proceed with the above process after everything is normal. The throttle orifice plate on the steam pipeline of the turbine oil pump should be adjusted in advance to ensure that the oil pump outlet oil pressure meets the requirements under rated steam parameters. (0.54Mpa) 5.3 Warm the pipe (in front of the main steam valve), drive the rotor 5.3.1 to close the anti-corrosion door, slightly open the bypass valve of the isolation valve, and warm the pipe at 0.2~0.3Mpa low pressure for 10 minutes ； Then increase the pressure in the pipeline to normal pressure at a pressure increase rate of 0.1~0.15MPa (table)/min (1~1.5 atg/min) for about 20 minutes. During the pressure increase process, attention should be paid to the appropriate degree of pressure increase, and the pipe expansion and support and lifting conditions should be checked. 5.3.2 After the pressure in the pipeline rises to normal pressure, gradually open the isolation valve until it is fully open (turn the handwheel off half a turn), and close the bypass valve of the isolation valve. 5.3.3 Fully open the air exhaust valve on the back pressure pipeline. 5.3.4 Check that the high-pressure electric oil pump or turbine oil pump is normal, and check the oil return condition of the bearing. The oil temperature at the outlet of the oil cooler should not be lower than 25 ℃. 5.3.5 Manually exit the turning device. 5.3.6 Rotate the regulator start valve handwheel to open the high and low pressure regulating steam valves. Note that the start valve handwheel should be fully opened. 5.3.7 Slowly open the main steam valve for 2-3 turns, close and then open the rotor after impulse, maintain a certain speed, and check whether there are any abnormal noises in the flow-through part, shaft seal, and main oil pump. 5.3.8 After everything is normal, keep the speed at 300~500r/min and warm up the machine for 30~40 minutes. Pay attention to the temperature rise of each bearing and the expansion and vibration of each part. 5.3.9 Depending on the shaft seal signal exhaust condition, put in the steam seal heater and adjust the pressure inside the heater to (absolute) (0.97~0.99ata). 5.3.10 When the bearing inlet oil temperature is higher than 40~50℃, put the oil cooler into operation and start the circulating cooling water pump to keep the oil cooler outlet oil temperature at 35~45℃. 5.3.11 After low-speed warm-up, make sure that everything in the unit is normal, gradually open the main steam valve, take 10 minutes to increase the speed to 1000~1200r/min, keep it for 60~90 minutes, and check again: 5.3.11.1 Oil temperature, oil pressure, oil tank level. 5.3.11.2 The temperature and oil return of each bearing, the oil return temperature cannot be lower than 30°C. 5.3.11.3 The working condition of electric oil pump or turbine oil pump. 5.3.11.4 Expansion of various parts of the steam turbine. 5.3.11.5 The temperature difference between the upper and lower half cylinders should not exceed 50°C. 5.3.12 After everything is normal, it can quickly and smoothly cross the critical speed of 1820r/min, and then increase the speed at a rate of 200 to 300r/min per minute. When the regulator starts to act, fully open the main steam valve (turn the handwheel back half a turn after opening it fully), and operate the synchronizer to adjust the speed to the rated speed. It takes about 10 to 15 minutes to increase the speed. 5.3.13 During the speed increase process, please pay attention: 5.3.13.1 When the unit makes abnormal noise or vibration, the speed should be reduced for inspection. 5.3.13.2 When abnormal phenomena occur in the oil system (for example, the oil temperature is too high or the oil pressure is too low, etc.), the speed increase should be stopped and the cause should be identified. 5.3.13.3 When the thermal expansion of the steam turbine changes significantly, the speed increase should be stopped and inspected. 5.3.13.4 When the oil pressure at the outlet of the main oil pump rises to the specified value, whether the electric oil pump or turbine oil pump automatically shuts down. 5.3.14 After the no-load operation is normal, check, adjust and adjust the security system test (about 10 minutes): 5.3.14.1 Main oil pump inlet and outlet oil pressure (inlet oil pressure 0.0687Mpa, outlet oil pressure 0.952 Mpa) 5.3.14.2 Pulse oil pressure is 0.363 MPa, axial displacement oil pressure is 0.5 MPa ； 5.3.14.3 Bearing oil temperature and lubricating oil pressure 0.0785～0.118MPa ； 5.3.14.4 Make each security device operate separately, and whether the main steam valve, regulating steam valve and extraction valve are quickly closed ； 5.3.14.5 The synchronizer controls whether the speed increase and decrease are smooth ； 5.3.14.6 Whether the upper limit speed of the synchronizer meets the specified value (during electric operation) ； 2880r/min 5.3.14.7 Whether the operating pressure of the safety valve meets the specified value. 5.3.15 When the steam turbine is started for the first time, after overhaul, after one month of shutdown, or after running for more than 2000 hours, the emergency breaker action test should be carried out. The steps are as follows:: 5.3.15.1 Pull out the synchronizer slide key, shake the synchronizer handwheel in the direction of speed increase, and increase the speed to 3300~3360r/min. At this time, the emergency interrupter should operate. Otherwise, immediately manually press the emergency interrupter throttle, stop and adjust the emergency interrupter operating speed. 5.3.15.2 After the emergency breaker is activated, turn the main valve control seat handwheel to the end. After the speed drops to 3000r/min, re-engage the emergency breaker throttle and reopen the main valve. 5.3.15.3 After the turbine is started for the first time or overhauled, the emergency breaker action test should be carried out three times. The difference between the first and second action speeds should not exceed 18r/min, and the average difference between the third and previous two action speeds should not exceed 30r/min. 5.3.15.4 Before the test, the gate should be opened to check the closing conditions of the main steam valve and the regulating steam valve. 5.3.15.5 For cold-started units, the test should be conducted after warming up at rated speed for 1 to 2 hours. 5.3.16 Adjust the back pressure to 5% higher than the heating network pressure and prepare to connect the back pressure exhaust pipe. When increasing back pressure, the exhaust steam temperature rise rate does not exceed 5℃/min. 5.3.17 Slowly open the electric isolation valve on the back pressure exhaust pipe (the bypass valve should be opened first), and at the same time close the air exhaust valve to keep the back pressure stable. 5.3.18 Close the main steam pipeline, back pressure exhaust pipeline, and the direct drain valve on the cylinder body. The drain valve on the extraction pipeline between the cylinder exhaust port and the extraction valve should be kept open. 5.4 With load 5.4.1 Steam turbine operates according to electric load: Cut off the pressure regulator, and after a comprehensive inspection of the unit is normal, send a ready signal to the main control room. 5.4.1.1 After the unit is connected to the grid, pay attention to the load cycle indication. 5.4.1.2 Increase the load at a load lifting speed of 150KW/min, and it will take about 60 minutes to reach full load. 5.4.1.3 When the load increases to 50% of the rated load, stay for 30 minutes to conduct a comprehensive inspection of the unit. Pay attention to the sound of the unit, thermal expansion, temperature of each bearing, vibration of the unit, and adjust the outlet temperature of the cold oil to between 35 and 45°C so that the bearing temperature does not exceed 65°C. 5.4.1.4 After everything is normal, continue to increase the load. Depending on the wind temperature of the generator, turn on the air cooler to maintain the inlet air temperature between 20 and 40°C. 5.4.2 According to the requirements of heat users, the steam turbine operates according to the heat load 5.4.2.1 When the back pressure regulator is put in, the unit can operate in pure back pressure or non-adjusted extraction mode: (a) The unit is connected to the grid. (b) Use a synchronizer to bring more than 25% of the electrical load. (c) Open the steam door on the signal pipeline of the back pressure regulator, and after the steam rushes out, close the air exhaust. Slowly open the stop valve connected to the back pressure regulator until it is fully open. (d) Rotate the handwheel on the upper part of the back pressure regulator to completely loosen the compression screw of the regulator spring. (e) Put in the back pressure regulator. (f) Slowly rotate the handwheel on the upper part of the back-pressure regulator in the direction of loading, and at the same time, rotate the handwheel of the synchronizer in the direction of load reduction (keeping the load unchanged) until the synchronizer is in the no-load position, and the operation is controlled by the voltage regulator. (g) During the switching process, pay attention to adjusting the system and heating network pressure and keep them stable. (h) When operating in non-adjusted extraction mode, the extraction steam chamber pressure must be 5% higher than the extraction steam heating network pressure before the extraction pipeline can be connected, and attention should be paid to the increase in electrical load. 5.4.2.2 When the extraction steam pressure regulator is put into operation, the unit can operate in pure extraction steam or back pressure non-adjusted mode: (a) The unit is connected to the grid. (b) Use a synchronizer to bring more than 25% of the electrical load. Open the steam valve on the signal line of the extraction steam pressure regulator. After the steam rushes out, close the exhaust air valve and slowly open the stop valve connected to the extraction steam pressure regulator. (c) Rotate the handwheel on the upper part of the extraction steam pressure regulator to completely loosen the compression screw of the pressure regulator spring. (d) Put in the extraction steam pressure regulator. Note that the switch handle should be rotated slowly to avoid sudden opening of the high-pressure regulating steam valve due to too low pressure in the pulse chamber. (e) Rotate the handwheel on the upper part of the extraction pressure regulator, adjust the pressure in the extraction chamber to be 5% higher than the pressure in the extraction heating network, and connect the extraction pipeline. (f) Adjust the synchronizer according to the back pressure heat load needs. When operating in pure extraction mode, the back pressure exhaust pipeline must not be completely closed to allow a certain cooling flow to pass. 5.4.2.3 The extraction steam pressure regulator and back pressure regulator are both put into operation. (a) Put in the back pressure regulator according to the aforementioned "A" (1) ~ (7). (b) Put in the extraction steam pressure regulator according to "B" (3) ~ (6). 5.4.3 According to the needs of each heat user, put in a desuperheater and deliver steam to the heat users. ； The thermal load increase and decrease speed should not exceed 5t/min, and the electrical load should not exceed the rated power (or maximum power). 5.4.4 Pay attention to the vibration of the unit. When the vibration increases, you should stop increasing the load. If the vibration is not eliminated after running at this load for 30 minutes, reduce the load by 10 to 15% and continue running for 30 minutes. If the vibration still cannot be eliminated, the reason should be identified. 5.5 Maintenance and inspection of steam turbine during operation 5.5.1 Keep the equipment clean and pay attention to protecting the insulation layer. Clean equipment and premises before each shift. 5.5.2 The communication signals on the dial are stipulated to be tested separately with electrical and boiler tests one minute after taking over. The meter readings during the shift should be recorded at least every 60 minutes. If the meter readings are found to be different from the normal values, the reasons should be identified. 5.5.3 Regularly check and calibrate various instruments and conversion equipment. Contact the mid-shift on Monday to test the water accumulation in the fuel tank, clean the water filter of the conversion shaft cooler, and test the turbine oil pump and high-pressure electric oil pump once during the mid-shift on Tuesday. 5.5.4 Regularly inspect the oil system to keep the pipelines clean and smooth, and there should be no oil leakage. The oil cooler should be flushed regularly, and the accumulated water and grease at the bottom of the oil tank should be released on time, and new oil should be added to keep the oil level normal. The oil leakage net should not be blocked. ； When the pressure difference between the front and rear of the oil filter exceeds 0.05MPa (0.5at), it should be switched ； Regularly check the quality of turbine oil. 5.5.5 Lubricating oil and grease must be regularly added to each bearing, lever joint and sliding surface of the front bearing seat and seat frame. High-temperature grease should be used on the spherical head pull rod on the adjusting steam valve lever and the rotating shaft of the bracket, and molybdenum disulfide oil should be used on the fork joint. 5.5.6 The valve on the steam pipeline from the turbine oil pump self-starting device to the turbine oil pump should be normally open so that the turbine oil pump can be started at any time. 5.5.7 The cycle change during turbine operation should not exceed 50±0.5Hz. 5.5.8 Move the valve stems of important valves such as the main steam valve and electric isolation valve up and down once or twice every day to avoid valve stem sticking or seizure. This operation should be performed under low load. 5.5.9 If the steam turbine often carries a fixed load, the steam valve switch should be regularly checked and adjusted by changing the load in a short period of time to prevent the valve stem from getting stuck. 5.5.10 The oil inlet temperature of each bearing should be maintained within the range of 35~45℃, the temperature rise generally does not exceed 10~15℃, and the lubricating oil pressure should be maintained at 0.08~0.12MPa (table) (0.8~1.2atg). 5.5.11 Regularly conduct security system tests and automatic operation tests of electric oil pumps and turbine oil pumps. 5.5.12 Pay attention when putting the backup oil cooler into operation: 5.5.12.1 Drain the oil from the throttle and check to make sure there is no water or oil residue on the oil side of the spare oil cooler. 5.5.12.2 Slowly open the inlet throttle of the backup oil cooler to fill with oil, and at the same time open the exhaust cock on the oil side to discharge the air. After all the air has been removed, close the cock. Be careful not to cause fluctuations in the oil system during the oil filling process. 5.5.12.3 Open the exhaust cock and water inlet valve on the water side of the backup oil cooler (the outlet water door should be opened first) to allow water to flow through the water side and air.

This post was last edited by zgj2405 on 2011-7-23 18:20. After excluding the problem, close the exhaust cock. 5.5.12.4 Slowly open the large oil side outlet throttle and water side inlet valve, being careful not to cause fluctuations in lubricating oil pressure and oil temperature. 5.5.12.5 If the running oil cooler is stopped, the valves on the oil side and water side should be slowly closed. When closing the water side valve, the inlet door should be closed first and then the outlet door. 5.5.12.6 The oil side pressure of the oil cooler should be greater than the water side pressure, and the water inlet door is used to adjust the cooling water volume. 5.5.13 It is prohibited to start the steam turbine under the following circumstances: 5.5.13.1 The oil temperature is lower than 25℃ or the lubricating oil pressure is lower than the normal value. 5.5.13.2 Any security device is not working properly. 5.5.13.3 The main steam valve, regulating steam valve, and extraction valve are stuck. 5.5.13.4 The self-starting device of the auxiliary oil pump is not working properly. 5.5.13.5 Abnormal errors occur in the tachometer and other indicating instruments. 5.5.13.6 The vibration of the unit exceeds 0.07mm. 5.5.14 When the unit cannot maintain no-load operation and the speed cannot be controlled without full load, it is prohibited to carry a load. 5.5.15 Under the following circumstances, it is prohibited to switch from synchronizer to voltage regulator control: 5.5.15.1 After the speed regulator is put into operation, the load is less than 25%. 5.5.15.2 After the governor is put in, the extraction and exhaust steam pressures are lower than the minimum limit value. 5.5.16 Inspect the circulating cooling water system. 5.6 Shutdown 5.6.1 Before reducing the load, all relevant departments should be notified to make preparations. 5.6.2 Each auxiliary oil pump is tested. 5.6.3 Check whether the main steam valve stem is stuck. 5.6.4 Load reduction. 5.6.4.2 When the extraction steam pressure regulator is put into operation: (a) Gradually close the electric isolation valve on the extraction pipeline, and at the same time rotate the handwheel on the extraction pressure regulator to reduce the pressure in the extraction chamber. After closing, use the wet electromagnetic reversing valve to close the extraction check valve. (b) Slowly rotate the switch handle of the extraction steam pressure regulator and remove the pressure regulator. When the regulator is cut off, the synchronizer should be loaded with 25%. (c) Close the steam door on the signal line of the pressure regulator. 5.6.4.3 When the extraction steam regulator and back pressure regulator are put into operation: (a) Remove the extraction steam pressure regulator according to “B”(1). (b) Remove the back pressure regulator as per "A" (2). 5.6.5 During the load reduction process, attention should be paid to: 5.6.5.1 Adjust the closing of the steam valve. If any jamming is found, the generator should not be disconnected from the power grid and the cause should be identified immediately. 5.6.5.2 Reduce the load at an appropriate speed. The load reduction speed is required to be greater than about 200 kW/min. Pay attention to adjusting the steam seal heater. 5.6.5.3 When the load drops below 100 kilowatts, the main steam valve can be closed to 1/3 to reduce the impact of the main steam valve seating during shutdown. 5.6.6 Use a synchronizer to reduce the load to zero. 5.6.7 After the unit is decommissioned, close the main steam valve. Turn the main valve control seat handwheel to the end and check whether the main valve is closed tightly. 5.6.8 Close the electric isolation valve on the exhaust pipe, open the air exhaust valve, open each direct drain door, and stop the steam seal heater. 5.6.9 During the shutdown and deceleration process, attention should be paid to whether the electric oil pump or turbine oil pump is automatically put into operation. Otherwise, the oil pump should be started manually to maintain the lubricating oil pressure not less than 0.055MPa (table) (0.55atg). 5.6.10 When shutting down, record the idle time, close the main steam pipe isolation valve, stop the desuperheater, and open each drain door. 5.6.11 After the rotor is completely stationary, immediately put the cranking device into operation and change to scheduled cranking after 8 hours of continuous cranking or the cylinder metal temperature (after adjustment level) drops to 250°C (within 2 to 6 hours, every 15 minutes) ； Within 6 to 12 hours, turn the car every 30 minutes ； Within 12 to 24 hours, turn the turbine every hour (turning the rotor 180° each time) until the turbine is completely cooled (cylinder metal temperature is lower than 150°C). 5.6.12 When cranking, turn on the electric oil pump or turbine oil pump, and turn on the cranking oil for lubrication. 5.6.13 Generally, the generator air cooler and shaft seal heater can be stopped after shutdown. ； When the oil temperature at the outlet of the oil cooler drops below 35°C, stop the circulating cooling water pump and cooling tower, and close the water side valve of the oil cooler. 5.7 Hot state starting 5.7.1 Carry out inspections and tests in accordance with the operating procedures that should be followed during normal starting. 5.7.2 Starting from shutdown, cranking should be continued. 5.7.3 When there is no abnormality in the unit and the vibration does not increase, the low-speed warm-up time can be appropriately shortened. 5.7.4 According to the strength of the cylinder, the lifting speed and load speed can be appropriately accelerated. 5.8 Steam seal heater, start-up, operation maintenance and stop 5.8.1 Start-up of steam seal heater: Open the circulating cooling water inlet and outlet valves, open the new steam inlet valve, and open the drain valve to the drain box. 5.8.2 Operation and maintenance: Always pay attention to the steam pressure should be around 0.097~0.099Mpa. 5.8.3 When the steam seal heater exits operation, it should: First close the steam inlet valve and drain valve, and then close the circulating cooling water inlet and outlet valve. 5.9 Operation and maintenance of the temperature reduction and pressure reduction device 5.9.1 Adjustment and operation of the temperature reduction and pressure reduction device. Before installing the entire device, the user should install gate valves or stop valves for cutting off steam at the front and rear of the device. A drain valve should be installed at the lowest position of the pipeline downstream of the device. Before putting into operation, in order to prevent dirt from entering the device and causing holes to be blocked, the pipes in front of the device must be carefully flushed. After flushing, open the pressure reducing valve to 20% (if an impulse safety device is used, the weight should be used to crush the impulse safety valve at this time), open the drain valve, and then open the desuperheating water valve to check whether the desuperheating water system is normal. After the inspection, close the desuperheating water. Then the pipes should be warmed. At this time, it is best to use bypass air supply (e.g.: Open the bypass valve of the gate valve), preheat the entire device with a steam pressure of no more than 0.02-0.05MPa, and the preheating time is no less than 30 minutes (other heat sources can also be used for preheating). After preheating, gradually open the gate valve (or stop valve) at the front of the device, with a steam pressure of 0.1-0.25MPa per minute. Boost the pressure at a certain pressure boost speed, and simultaneously operate the pressure reducing valve and adjustable nozzle to make the outlet steam parameters change stably and remain within the specified range. During the pressure boosting process, the impulse safety valve must be calibrated. When the pressure is increased to 50% of the rated pressure, manually lift the lever of the impulse safety valve to check the sensitivity and sealing of the main safety valve. When the specified pressure is reached, set the impulse safety valve to thallium. If the safety device uses a spring safety valve, the spring safety valve must take off and return to its seat under the set pressure. The trap installed downstream of this device will discharge the condensed water during the debugging process. When the steam parameters of the entire device are adjusted and the steam parameters are normal, the trap will be closed and the entire device can be put into automatic control operation. When the temperature and pressure reducing device needs to stop working, first close the valve in front of the temperature reducing and pressure reducing device, open the drain valve and gradually close the pressure reducing valve and adjustable nozzle. 5.9.2 Maintenance of the temperature reduction and pressure reduction device The temperature reduction and pressure reduction device should be installed indoors. During the entire operation period of the device, the operating parameters of the steam should be regularly recorded and the flexibility of the mechanical movement should be checked and calibrated. The areas that require lubricating oil must be refueled frequently, and the equipment must be maintained and kept clean. Regularly check the flexibility of opening and closing of the main safety valve. You can carefully and quickly lift the lever of the impulse safety valve to check. The device should be inspected and calibrated regularly to eliminate faults discovered during maintenance and operation. Worn parts such as the pressure reducing valve, adjusting nozzle valve disc, valve seat, and lining seat should be repaired in time. The water spray desuperheater should regularly check the condition of the mechanical atomizing nozzle. If the small holes are blocked or corroded or other defects are found, they should be repaired. The repaired valves should be re-tested according to the specifications. 5.10 Operation of circulating cooling water system 5.10.1 Operation and maintenance of circulating water pump 5.10.1.1 Preparation before starting (a) Pull out and rotate the motor fan blades by hand. The impeller should have no jamming and can rotate flexibly. ； (b) Open the inlet valve, close the outlet valve, and remove the air in the pump so that the pump cavity is filled with liquid. (c) Turn the pump by hand to allow the lubricant to enter the end face of the mechanical seal. ； (d) Jog the motor to confirm whether the rotation is correct (the unit rotates clockwise when viewed from the motor end). If it is incorrect, swap any two phases in the wiring to change the motor rotation. ； (e) If hot liquid is transported, the pump should be preheated before starting, with a heating rate of 50°C/h. The preheating of the pump is achieved by continuously circulating the transported liquid so that all parts are evenly heated. 5.10.1.2 Starting and running (a) Fully open the inlet valve and close the discharge pipe valve ； (b) Turn on the power, and when the pump reaches normal speed, gradually open the valve on the discharge pipe and adjust to the required working conditions. ； (c) Pay attention to the instrument readings. The temperature rise of the motor bearings should not be higher than 75 ℃, and should not exceed the external temperature of 35°C. ℃ ； (d) Check the leakage of the shaft seal. Normally, the leakage of the mechanical seal is <3 drops/minute. If any abnormality is found, it should be dealt with in time. 5.10.1.3 Stop (a) Gradually close the valve on the discharge pipe and cut off the power supply ； (b) Close the inlet valve ； (c) If the ambient temperature is below 0°C, all the liquid in the pump should be drained to avoid freezing and cracking ； (d) If it is not used for a long time, the pump should be disassembled, cleaned, and packaged for storage. 5.10.1.4 Maintenance and maintenance of the pump Maintenance and maintenance during operation (a) The water inlet pipeline must be highly sealed and cannot leak water or air. ； (b) It is prohibited to operate the pump for a long time in a cavitation state ； (c) It is prohibited to operate the motor with overcurrent for a long time when the pump is operating under large flow conditions. ； (d) The pump should be supervised by a dedicated person during operation to avoid accidents. ； (e) The bearings should be refueled every 500 hours of operation of the pump. ； (f) After the pump has been running for a long time, when the noise and vibration of the unit increase due to mechanical wear, it should be stopped for inspection. Wearing parts and bearings can be replaced if necessary. The unit is generally inspected once a year. ； (g) When a malfunction occurs during the operation of the unit, it can be rectified according to the methods provided in the following table. If it cannot be rectified, do not dismantle the unit at will. Please contact our company's maintenance department or special maintenance point in time. 5.10.1.5 Maintenance and maintenance of mechanical seals (a) The lubricating fluid of mechanical seals should be clean and free of solid particles ； (b) It is strictly prohibited for mechanical seals to work under dry grinding conditions ； (c) The pump (motor) should be rotated several times before starting to avoid breakage and damage to the sealing ring caused by sudden start. 5.10.2 Operation and maintenance of reducer 5.10.2.1 Motor insulation should be checked. 5.10.2.2 The motor current should be measured to see if it is overloaded. If it exceeds 90% of the rated value, the fan angle should be adjusted or the matching configuration should be reviewed to see if it is reasonable. 5.10.2.3 During operation, check the oil drain plug and the main shaft for oil leakage. If oil leakage occurs, it should be eliminated in time. 5.10.2.4 After normal operation, check the oil level once a week, add lubricating oil in time, replace the lubricating oil once every three months, and maintain the oil level at all times. 6 Accident Prevention and Handling 6.1 Accident Handling Principles 6.1.1 When an accident occurs, the personnel on duty shall judge the occurrence of an accident based on the instrument indications, external phenomena of the unit, machine noise, etc., and shall correctly judge the root cause of the accident, quickly eliminate the danger to people and equipment, and eliminate the fault. 6.1.2 When a fault occurs, all personnel on duty must strictly adhere to their posts, concentrate all their energy, try their best to ensure the normal operation of the equipment, handle the accident normally, report to the duty leader, obey the correct orders of the duty leader, and repeat them once. 6.1.3 If the fault occurs during shift handover, the shift handover should be delayed, but the successor can assist in the work under the unified command of the on-duty officer. The shift can not be handed over until the unit resumes normal operation or receives an order from the duty commander to take over the shift. 6.1.4 After the fault is eliminated, the observed phenomenon, fault development process, time and handling situation should be recorded in the operation log. 6.2 Failure shutdown When the following situations occur, the machine should be shut down immediately. 6.2.1 When the rotational speed exceeds 3360r/min, the emergency breaker will not operate. 6.2.2 The vibration of the bearing seat exceeds 0.07mm. 6.2.3 The main oil pump fails. 6.2.4 Abnormal adjustment system. 6.2.5 If the axial displacement of the rotor exceeds 0.7mm, the axial displacement interrupter or axial displacement monitoring device will not operate. 6.2.6 The bearing return oil temperature exceeds 70 ℃ or the bearing metal temperature exceeds 100 ℃. 6.2.7 When the oil system catches fire and cannot be extinguished quickly. 6.2.8 The oil level in the fuel tank suddenly drops below the minimum oil level. 6.2.9 Water impact occurs. 6.2.10 The unit makes abnormal noises. 6.2.11 The main steam pipe or the extraction and exhaust pipes are broken. 6.2.12 If the extraction steam or exhaust steam pressure rises beyond the limit value, the safety valve will not operate. 6.3 Abnormal steam pressure and steam temperature 00.196 00.294 +10-15 6.3.1 When the steam turbine is running normally, the allowable variation range of steam temperature and steam pressure in front of the main steam valve is 435°C and 3.43± MPa. If the steam temperature and steam pressure exceed this range, contact the boiler in time to restore normal parameters as soon as possible. 6.3.2 Treatment of excessive steam temperature and steam pressure: 6.3.2.1 When the steam temperature exceeds 445℃, the boiler should be contacted to cool down. For every 2℃ increase, the load should be reduced by 20%. 6.3.2.2 When the steam pressure in front of the main steam valve is 3.92Mpa or the steam temperature is 3.92Mpa or the steam temperature is 450℃, each operation shall not exceed 0.5 hours (otherwise it will be shut down due to failure). 6.3.3 When the steam temperature drops to 410°C, the boiler is required to increase the steam temperature. If it continues to drop below 400°C for every 5°C drop, reduce the load by about 500 kilowatts and drain water accordingly. When the steam temperature drops below 380°C, it should shut down due to malfunction. 6.3.4 When the steam pressure drops to 3.04Mpa, increase the pressure through the boiler. When it drops below 2.44Mpa, reduce the load by 500 kW for every 0.1Mpa drop. ； When it drops to 1.89 Mpa, the load reduction is "0". When it drops below 1.89 Mpa, a fault shutdown should be reported. 6.3.5 When steam temperature and steam pressure change, attention should be paid to axial thrust, thrust pad temperature, internal sound or vibration of the unit, and records should be kept. 6.4 Oil system malfunction: Oil shortage, oil cutoff, oil pressure drop, oil temperature is too high, oil leakage, oil tank and oil level drop, and oil system fire are all oil system failures. 6.4.1 Reasons and solutions for the temperature rise of each bearing (a) The cooling water of the oil cooler is improperly adjusted. The outlet oil temperature should be adjusted normally when the temperature rises. (b) The cooling water interruption shall be restored as soon as possible. (c) If the bearing oil inlet is clogged or tight, stop the machine for processing. (d) If the oil cooler or sand box is blocked, it should be cleaned. (e) When it is found that the bearing is smoking or the temperature of any bearing exceeds 70°C, emergency shutdown is required. 6.4.2 Reasons and solutions for the drop in oil pressure and tank oil level (a) Oil leakage in the oil system should be eliminated. If it is not eliminated and the oil level in the tank cannot be maintained, the machine should be shut down. (b) If the main oil pump fails and is short of oil, the oil is cut off and the auxiliary oil pump is shut down. (c) When shutting down, if the oil filter is clogged and the oil pressure drops, the auxiliary oil pump should be started and shut down. If the oil pump makes an abnormal sound and the oil pump stops rotating, turn on the gear oil pump and then shut down. If the oil pumps are not normal, turn on the DC oil pump and then shut down the machine. 6.4.3 Causes and treatment of oil system fire: The flange is not tight and the pipe is broken, causing the oil to come into contact with the high-temperature pipe. If it cannot be extinguished, the machine should be stopped urgently and the most effective treatment should be taken, such as using asbestos cloth or a dry fire extinguisher to extinguish it. 6.5 Axial displacement of the steam turbine rotor 6.5.1 When it is found that the axial displacement gradually increases (that is, the axial displacement oil pressure gradually decreases), pay special attention to the temperature of the thrust bearing, refuel, check the operation of the steam turbine, and listen for any abnormal sounds and vibrations in the unit. 6.5.2 When the axial displacement exceeds the normal value, the value should be reported and: (a) Rapidly reduce the load to reduce the axial displacement to the rated value. (b) Check the thrust shaft temperature. (c) Measure the dynamic vibration of the turbine and listen to the internal sounds of the unit. (d) If the shaft displacement exceeds the limit value and the unit is not operating normally, emergency shutdown should be taken. 6.6 Water impact 6.6.1 Water impact is one of the most serious and dangerous accidents in steam turbine operation. It may cause the thrust bearing to melt, the blades to be damaged, the high and low pressure shaft seals to be damaged, etc., causing serious accidents. 6.6.2 Main symbols and treatment methods of water impact: (a) The steam temperature drops sharply (b) White moisture emerges from the pipe flange, shaft seal signal tube, and cylinder joint surface, and there is a sound of water impact. (c) The temperature of the thrust bearing increases. The unit has a large vibration port, and there is metal noise and noise. If the above situation occurs, emergency shutdown should be performed and quick drainage work should be performed. (d) Check the thrust bearing and axial displacement oil pressure, listen to the internal sound of the unit, and record the idle time correctly. (e) If there is a slight water impact on the unit, it will operate normally with no abnormal sound or vibration. If the drain door is opened wide and the steam temperature rises, it can resume operation. However, the unit must be inspected more closely. If it is abnormal, it should be shut down. 6.7 Abnormal vibration and noise 6.7.1 If the unit suddenly vibrates strongly and hears the sound of metal friction, emergency shutdown should be carried out. 6.7.2 When the load changes, if the unit experiences unbearable strong vibration or a suspicious sound is emitted from the unit, the load must be reduced until it is eliminated. At the same time, the cause of the vibration must be studied and checked.: (a) Whether the lubricating oil pressure has dropped. (b) Whether the oil temperature at the inlet and outlet is too high or too low. (c) Whether the steam temperature is too high or too low. (d) Whether the turbine axial displacement oil pressure and expansion are normal. (e) Whether the steam temperature is too high. 6.7.3 Symbols, causes and treatment of strong vibration in steam turbine: (a) Bearing vibration * * If it exceeds the standard, it will tremble or be numb to the touch. (b) The turbine body shakes and the thermal insulation falls off. (c) Abnormal sounds are coming from the cylinder. 6.7.4 The reason may be: (a) Water impact (b) The warm-up speed is not fast enough or the load is too fast. (c) The rotor is bent. (d) The lubricating oil temperature is too low, which affects the formation of oil film. (e) The steam temperature is too high or too low. (f) Leaf damage. (g) The bearing temperature is too high or the gap is too large. (h) Excessive exhaust steam temperature causes abnormal expansion and deformation of the cylinder. (i) The quality of equipment or installation and maintenance is poor. (j) Generator rotor coil short circuit 6.7.5 treatment method: Quickly tap the emergency security device and treat it as an emergency shutdown. 6.8 Cycle rate change 6.8.1 The steam turbine is allowed to operate when the cycle rate exceeds 50±0·5 cycles/second, otherwise the cycle will be restored per main control contact. 6.8.2 When the cycle rate drops, attention should be paid to checking the conditions of the oil system and speed control system to prevent the main steam valve from automatically closing due to the drop in oil pressure. The auxiliary oil pump should be started. 6.9 Load shedding 6.9.1 The generator suddenly sheds the load to zero, the speed rises and stabilizes at a certain value, and the speed regulating valve is closed. ； It shows that the load shedding is caused by the fault of the electrical part. Since the regulating system takes action in time, the speed is controlled below the operating speed of the emergency safety device. ； At this time, the tachometer should be adjusted to the normal value and the components should be checked to see if they are normal before the load can be reconnected. 6.9.2 The generator suddenly sheds the load to zero, the speed rises and then drops, and the speed regulating valve is fully closed. It shows that the load shedding is caused by the failure of the electrical part. Because the adjustment system is not adjusted in time, the speed has risen to the emergency safety device operating speed. At this time, attention should be paid to the oil pressure, the electric oil pump should be turned on, the exhaust steam should be bleeded, the adjustment system should be checked, and the speed control mechanism can only be restarted after eliminating defects. 6.9.3 The generator load drops to zero, the speed decreases, and the speed regulating valve and main valve are fully closed. ； It indicates that the load shedding is caused by the action of the security device or misoperation. ； At this time, the oil pressure should be checked according to regulations, the electric oil pump should be started, the exhaust steam should be vented, and the defects in the adjusting mechanism should be eliminated before starting. 6.9.4 After the generator load is shed, the main steam valve and the regulating steam valve are all closed, the security devices are activated, the generator is not detached, the speed is normal, and the generator becomes a motor. ； At that time, the external power grid drove generators and steam turbines ； At this time, you should first decommission and pay attention to whether the electric oil pump is started. When it comes to a complete stop, return it to its original state and recheck. Only after confirming that everything is normal can you restart the turbine. 6.10 Sudden increase in load When the load suddenly increases, you should: 6.10.1 Quickly check the indication of the load meter and the opening of the speed regulating valve. If the load exceeds the rated value, contact the main control to reduce the load. 6.10.2 Check the thrust bearing temperature. 6.10.3 Inspect and listen for vibration and abnormal noise in the unit, and whether the steam temperature, steam pressure, oil temperature, and oil pressure are normal. 6.11 Serious overspeeding of the steam turbine 6.11.1 If the turbine speed exceeds the operating speed of the emergency safety device and continues to rise, if it cannot be stopped quickly, a major and vicious accident will occur. General symbol for serious speeding: (a) The steam turbine makes abnormal sounds. (b) The speed indicates that it exceeds the rated indicated value and continues to rise. (c) Oil pressure increases rapidly. (d) The vibration of the unit increases. 6.11.2 When serious speeding occurs, the following operations should generally be followed: (a) Stop the manual emergency safety device and check whether the main steam valve and speed regulating valve are closed. (b) When it is found that the main steam is not closed tightly, the isolation steam valve should be closed immediately. 6.12 Damage or breakage of blades during operation 6.12.1 General signs of damage or breakage of blades during operation: (a) Impacts and abnormal sounds occur to varying degrees in the steam overnight flow part. (b) The vibration of the unit increases. 6.12.2 When the above situation occurs, the machine should be shut down urgently. 6.13 Failures in steam pipelines and other pipelines. When pipelines fail, the personnel on duty must take countermeasures to prevent personal injury and equipment damage. 6.13.1 The turbine should be shut down quickly if the main steam pipe breaks or the flange leaks. 6.13.2 Cut off the steam source, open the doors and windows of the machine room to release the steam, and be careful not to let it blow around to prevent injury from the steam flow. 6.13.3 When vibration or impact occurs in the main steam pipe,: (a) Check whether the steam temperature and steam pressure are normal. If there is obvious water impact, shut down the machine as a water impact accident. (b) Open the drain valve to trap water, but if it still cannot be eliminated, the machine should be shut down for treatment. 6.13.4 When other pipes fail, they should: (a) Take immediate measures to prevent personal and equipment hazards. (b) Try to stop or reduce the leakage of soda, water and oil pipelines. 6.13.5 If the safety of the unit is affected, the supervisor should be reported to the supervisor for shutdown. 6.14 Fire 6.14.1 There was a fire in the machine room, but it had not yet spread to the unit equipment and steam pipes. (a) Notify the duty leader and relevant personnel to organize fire fighting. (b) Use fire-fighting equipment within the factory to extinguish the fire. (c) If there is a threat to the unit, the unit should be shut down for processing. 6.14.2 When extinguishing fire, different fire extinguishing equipment should be used according to the specific situation to protect the unit from damage. (a) Use foam fire extinguishing agent, water or sand to extinguish fires involving gasoline and other oil-based items soaked in fire oil. (b) Use foam fire extinguishing agent, water or sand to extinguish the fire when oil-soaked rags and wooden products are burning.

:victory: Does anyone have manuals and related e-books?