Integrated boiler installation process

Thread Content

This process is suitable for the installation of KZL horizontal packaged boilers with working pressure P≤1.3MPa and evaporation capacity Q≤4t/h. The installation of other similar horizontal and vertical packaged boilers can also refer to this standard. Keywords: Packaged boiler installation process 1 Scope This process is suitable for the installation of KZL horizontal packaged boilers with working pressure P ≤ 1.3MPa and evaporation capacity Q ≤ 4t/h. The installation of other similar horizontal and vertical packaged boilers can also refer to this standard. 2 Referenced standards The provisions contained in the following standards constitute provisions of this standard through reference in this standard. At the time of publication of a standard, the versions shown are valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the standard listed below.: GB50235 — 1997 “Code for Construction and Acceptance of Industrial Metal Pipe Engineering” JBJ23 — 96 “General Code for Construction and Acceptance of Mechanical Equipment Installation Project” JBJ27 — 96 “Code for Construction and Acceptance of Industrial Boiler Installation Project” JBJ29 — 96 “Code for Construction and Acceptance of Installation Project of Compressors, Fans and Pumps” China * * "Steam Boiler Safety Technical Supervision Regulations" issued by the Ministry of Labor of the Republic of China in Document No. 276 in 1996 1 Main steam valve 2 Manhole 3 Lifting lugs 4 Safety valve 5 Water level gauge 6 Boiler body 7 Front smoke box 8 Front arch 9 Coal hopper 10 Coal gate 11 Ignition door 12 Sprocket 13 Tightening bolt 14 Sprocket shaft 15 Fire door (left) 16 Ash hopper 17 Hydraulic transmission device (or speed regulator transmission device) 18 Pressure gauge 19 Chain grate 20 Bracket 21 Wind insulation board 22 Wind regulating window 23 Platform escalator 24 Fire dial door 25 Rear roller 26 Eagle iron 27 Blower 28 Water wall pipe 29 Steam pipe 30 Spiral slag outlet 31 Down pipe 32 Water inlet pipe 33 Hand hole 34 Fire door (rear) 35 Rear arch 36 Furnace wall 37 Insulation layer 38 Blowdown valve 39 Header 40 Rear shed pipe 41 Inspection hole 42 Flue 43 Economizer 44 Ash lock 45 Dust collector 46 Induced draft fan 47 Foundation 4 Process flow block diagram (see Figure 2) 5 Process 5.1 Construction preparation 5.1.1 Technical preparation Construction drawings and technical documents should be complete, and the boiler body diagram should have the approval mark of the safety supervision agency ； 　　Construction personnel are carefully familiar with drawings and technical documents, and understand design intentions and quality requirements. ； 　　Prepare a machine tool usage plan based on the needs of the construction site ； 　　Prepare construction progress plan according to project progress requirements ； 　　Prepare construction budget and construction plan, and prepare materials according to the budget ； 　　Carry out technical briefings and safety measures briefings for the team. 5.1.2 Equipment inventory and acceptance 5.1.2.1 Together with Party A, the boiler parts and components will be counted and accepted according to the packing list. 5.1.2.2 Deformation caused by transportation and stacking. Attachments that exceed the requirements of the specification should be recorded, and the handling method should be studied together with Party A. 5.1.2.3 Missing and damaged parts should be recorded and Party A should be notified for handling. 5.2 Foundation acceptance and marking 5.2.1 Foundation acceptance shall be carried out by Party A together with the civil engineering and installation parties to inspect the foundation ； 　　The civil engineering department should hand over the longitudinal and transverse center datum lines, elevation datum points and relevant measurement data of the boiler foundation to the installation unit. ； 　　The foundation appearance should be free of cracks, holes, exposed tendons and dropped corners. ； 　　When the size and quality of the foundation do not meet the requirements, they must be repaired to meet the requirements before installation can be carried out. ； 　　The dimensions of the foundation shall comply with the requirements specified in Table 1 and shall be recorded. Table 1 Allowable deviation of equipment foundation dimensions mm Draw the following installation reference lines based on the boiler room layout plan and boiler foundation drawing. 　　Boiler longitudinal centerline ； 　　Boiler grate front axis center line ； 　　Longitudinal centerline and transverse centerline of hydraulic transmission device ； 　　Economizer longitudinal centerline and transverse centerline ； 　　The longitudinal centerline and transverse centerline of the induced draft fan and dust collector ； Draw out the elevation lines that must be installed around the foundation according to the civil construction datum elevation line ； The center line dimensions of the boiler room equipment are all 5.2. The boiler body is installed in place. 5.3.1 Check the weight of the boiler body and equip lifting equipment according to the weight of the boiler body. The lifting operation for equipment hauling should comply with the relevant requirements in Chapter 4 of the "Lifting and Installation Operating Procedures" issued by the company. 5.3.2 During lifting, the stress point of the guide pulley should be firm, and the track timbers laid on the foundation should be slightly higher than the upper surface of the foundation. 5.3.3 Before installing, find out the front and rear center lines of the headers on both sides of the boiler body. 5.3.4 After the boiler is put on the foundation, first move the boiler on the pipe and initially align it in place. Then put the pad iron on one end, jack up the boiler from the other end, remove the upper and lower supporting plates of the pipe, and finally make the boiler stable by increasing or decreasing the pad iron. Correctly placed on the base soil. 5.3.5 Tools for aligning the boiler body. Use jacks, line hammers, levels, and liquid connectors. The lateral level can be measured with a spirit level on the flange seat of the main air valve (remove burrs and impurities and keep it smooth), or use a hose level to measure the water levels on both sides. 5.3.6 The alignment of the boiler body should meet the following requirements: a. The longitudinal centerline of the boiler coincides with the longitudinal centerline of the foundation, and the error is not greater than ±10mm. ； b. The center line of the front axis of the boiler grate coincides with the center line of the front axis drawn on the basis, and the error is not greater than ±2mm. ； c. For boilers that do not have a sewage discharge slope during manufacture, the front end of the boiler should be 25mm ~ 35mm higher than the rear end during alignment to facilitate sewage discharge. ； d. For boilers that have a discharge slope during manufacture, the longitudinal direction of the boiler should be horizontal during alignment. ； e. The lateral horizontal deviation of the boiler should not be greater than 5m. 5.4 The installation of platforms, escalators and railings shall meet the following requirements: a. Bolts must be tightened ； b. The unevenness of the platform shall not be greater than 1.5mm per meter ； c. The vertical height of the handrail column shall not be greater than 5 mm. ； d. The railings should be neat and beautiful, and the curvature of the railings should not be greater than 5mm per meter. ； e. The welds should be strong and beautiful, and the railing welds should be polished smooth ； f. The paint should be touched up after installation. 5.5 Installation of body pipes, valves and instruments 5.5.1 Welding of boiler body pipes should be performed by qualified welders. 5.5.2 The main pipelines, valves and instruments shall be installed according to the requirements of the drawings. 5.5.3 The safety valve should be installed after a separate hydraulic pressure test. The safety valve should be installed with an exhaust pipe. The exhaust pipe should be as straight as possible to the outdoors. The bottom of the safety valve exhaust pipe should be equipped with a drain pipe connected to a safe location. 5.5.4 All types of valves should be cleaned before installation, and the tightness of the valve disc and valve seat should be checked. The packing should be free from damage. Flexible movements. 5.5.5 The sewage pipe shall be connected to the sewage pool or other safe place. Pipes should be securely fixed to prevent shifting or accidents. 5.5.6 The elevation deviation of the water level gauges on the left and right sides should not exceed ±2mm, and the red and obvious marks of "highest water level", "lowest water level" and "normal water level" should be correctly marked on the water level gauge. The drain pipe below the water level meter must be connected to a safe place. The cock of the water level gauge rotates flexibly and must not leak. Lighting equipment must be installed at the water level table to facilitate observation. 5.5.7 The pressure gauge must be installed and verified to be qualified. When installing the pressure gauge, the dial surface should be vertical or have an inclination of no more than 30° for easy viewing and reading. A red line should be drawn on the pressure gauge scale. To indicate the maximum working pressure of the boiler. The center line of the boiler body is used as the benchmark, so the decision or modification of the boiler center line should take into account the installation possibility of relevant auxiliary equipment as much as possible. If there are multiple boilers, the horizontal reference centerline should be released at one time. 5.6 Water pressure test of the boiler body 5.6.1 After the pipelines, valves and instruments of the boiler body are installed, inspect and clean the inside of the boiler. 5.6.2 The safety valve should be closed and isolated with a blind plate, and the manhole and hand hole should be closed. 5.6.3 Install temporary water inlet pipe, vent valve and drain pipe for hydraulic pressure test. The vent valve should be set at the highest point of the boiler to facilitate the exhaustion of air in the furnace. 5.6.4 The pressure gauge used for the hydraulic pressure test should be qualified after calibration, its accuracy level should not be lower than level 2.5, and the number of installations should be no less than 2. The reading should be based on the pressure gauge of the drum. 5.6.5 The ambient temperature of the hydraulic pressure test shall not be lower than 5°C. If it is lower than 5°C, antifreeze measures shall be taken. 5.6.6 The pressure of the hydraulic test should comply with the requirements in Table 2. Note: The values ​​in Table 2 refer to the provisions of Article 111, paragraph 1, of the "Steam Boiler Safety Technical Supervision Regulations". 5.6.7 After the boiler is filled with water, the air in the furnace should be released, and the pressure should be slowly raised to 0.3-0.4MPa. An inspection should be carried out. If there is water leakage at the manhole and flange, the bolts of the manhole and flange should be tightened. 5.6.8 When the water pressure rises to the working pressure, the pressure increase should be paused, check all parts for leaks, and then slowly increase to the test pressure. 5.6.9 After rising to the test pressure, maintain it for 20 minutes, and then lower it to the working pressure for inspection. The pressure should remain constant during the inspection. There is no leakage in each part and there are no water beads on the welds, which means the hydraulic pressure test has passed. 5.6.10 When the hydraulic pressure test fails, the cause should be checked first, and then the construction unit should be contacted in a timely manner. Notify the manufacturing unit. 5.6.11 After the hydraulic pressure test, the pressure should be reduced first. When the pressure drops to zero, the air valve should be opened, and then the drain valve should be opened to drain the water. 5.6.12 The hydraulic pressure test should be recorded in detail, and the visa procedures should be completed after passing the test. 5.7 Economizer installation 5.7.1 Each support column should be marked with a consistent elevation line to facilitate the leveling of the support. 5.7.2 The bracket should be assembled in a single piece on the ground. When assembling, attention should be paid to the straightness, bending, twisting, spacing size and diagonal size of the bracket. 5.7.3 The economizer bracket is hoisted according to different construction site conditions, and various methods are used to install it. After the economizer bracket is in place, the top is temporarily fixed with a wave rope. 5.7.4 The alignment mark height of the economizer bracket shall be consistent with the center mark of the boiler flue gas outlet and the center height of the economizer flue gas inlet. The alignment steps are as follows: a. According to the center line of the bracket installation foundation, align the longitudinal and transverse centers of the bracket and meet the requirements. ； b. To align the verticality of the support columns, each column should be measured for plumbness in two different directions. If the measured value is greater than the specification requirement, the bottom of the column shall be based on the base line, and the top shall be adjusted to the required value using the wave wind rope to loosen or tighten it.: c. To align the level of the support columns, use a hose level to measure the uniform elevation of each column. If the columns are high or low, you can use the inclined pads at the bottom of each column to adjust them. 5.7.5 The alignment of steel support columns should meet the following requirements: a. The position deviation of each column should not exceed ±5mm ； b. The distance between each column is L, and its deviation should not exceed ±1/1000L, with a maximum of ±10mm ； c. The elevation deviation of each column and beam should not exceed ±3mm ； d. The non-plumb degree of the column should not exceed 1/1000, and the maximum total height should not exceed 10mm. ； e. The distance between the two diagonals on the vertical plane between the two columns is S, and the unequal length should not exceed 1/1000S, and the maximum should not exceed 10mm. ； f. The distance between the corresponding two diagonals in the upper horizontal plane or lower horizontal plane of each column is L 1 , and their unequal length should not exceed 1.5/1000.L 1 , and the maximum should not exceed 15mm. ； g. The unevenness of the beam shall not exceed 1/1000 of the length, and the maximum shall not exceed 3mm. ； h. After the bracket alignment meets the requirements of the construction drawings and specifications, the welding operation of the bracket should be carried out, including the welding of the bracket and the embedded bottom plate. 5.7.6 Installation of economizer body a. Before installation, check whether the padding around the economizer pipe is tight and firm, and whether the shell plate is flat. ； b. The economizer should be hoisted into place using different lifting methods according to different on-site construction conditions.: c. After the installation of the economizer is completed, a hydraulic pressure test should be carried out. The test pressure is 1.25P + 0.5MPa, where P is the working pressure of the boiler. ； d. The economizer safety valve does not participate in the hydraulic pressure test of the gas saving system. Use a pressure test pump to adjust the economizer safety valve separately. Its opening pressure is 1.1 times the working pressure of the installation location. 5.8 Dust collector installation 5.8.1 The dust collector bracket should be installed in place according to the marked basic position line. ； 5.8.2 Align the verticality and elevation of the bracket ； 5.8.3 When hoisting the dust collector, pay attention to the direction of the inlet and outlet, and be careful not to damage the wear-resistant coating. ； 5.8.4 The permissible deviation of the verticality of the dust collector is l/1000 ； 5.8.5 When installing the air lock, attention should be paid to whether the counterweight is appropriate. 5.8.6 The smoke pipe connection between the inlet and outlet of the dust collector, which uses flange connection, must be padded with high-temperature resistant padding to make the interface tight and prevent soot leakage. Touch-up paint work should be carried out after installation. 5.9 Installation of induced draft fan 5.9.1 Before installation, the equipment foundation and anti-vibration device should be inspected and comply with the design requirements. Inventory the parts, components and accessories according to the equipment packing list. The main installation dimensions should meet the design requirements. The direction of impeller rotation and the direction of the stator guide blades should comply with the provisions of the equipment technical documents. There should be no obvious deformation or serious corrosion or bruises. 5.9.2 When hoisting, the appropriate location should be selected to bundle the 100-kg steel wire rope to avoid damage to the machined surface and transmission components. 5.9.3 When aligning and leveling the induced draft fan, the two sections of flue at the entrance and exit of the induced draft fan should be equipped, and the position and elevation should be adjusted appropriately to make the front and rear connections reliable and avoid the strong opposition of the import and export flues. The longitudinal level of the induced draft fan can be measured on the journal, and the transverse level can be measured on the guide rail surface at the bottom of the motor. The coaxiality of the coupling should be corrected to make it meet the requirements. Then grout and maintain the anchor bolts. The installed inlet and outlet flues should not be pulled hard except that the connecting flange should be flat in the middle. The weight of the flue should not bear pressure on the casing to prevent deformation of the casing. After the installation is completed, the unit should be retested and leveled. If it does not meet the requirements, it should be adjusted and the anchor bolts should be tightened. The overall levelness of the unit should not be greater than 1/1000. 5.9.4 The allowable deviation value for coaxiality correction of induced draft fan coupling (blower, water pump and other transmission equipment also refer to this value) is shown in Table 3. 5.9.5 Trial operation. Before commissioning, a certain amount of lubricating oil must be added after cleaning according to the provisions of the equipment technical documents. Cooling water pipes should be kept clean and smooth. When turning the fan rotor, there should be no jamming or friction. The rotation of the motor should match the rotation of the fan. Before starting the induced draft fan, the regulating valve should be closed. After turning on the induced draft fan, the regulating valve should be slowly opened to allow the induced draft fan to test run under a smaller load. The cold test run time should not exceed 5 minutes according to the instructions to avoid affecting the motor. When the motor is running normally, the current shall not exceed the rated value and the continuous operation time shall not be less than 2 hours. Note: The values ​​in Table 3 refer to Section 5.3.3 of JBJ23-96 "General Specifications for Construction and Acceptance of Mechanical Equipment Installation Projects". 5.9.6 The effective value of the vibration speed of the fan during operation shall not be greater than 6.3mm/S, and the temperature rise of the fan bearings and rolling bearings shall not be higher than 40℃ ； The sliding bearing temperature should not be higher than 65℃. 5.10 Flue and chimney installation 5.10.1 The chimney should be assembled on the ground, and high-temperature resistant gaskets should be used between flanges, which should be even and tight. 5.10.2 Before lifting the chimney, the lightning rod should be installed by an electrician and the electrical grounding should be good. 5.10.3 The chimney assembly should be kept in a straight line, the error shall not be greater than 1/1000, and the total length shall not be greater than 20mm. 5.10.4 Before hoisting the chimney, check whether the wind ropes, anchor points or fixing devices and orientations meet the requirements according to the drawings. If it does not meet the requirements of the drawings, it should be submitted to the construction unit for suggestions for correction. 5.10.5 After the chimney is in place, use the wave rope to align the verticality of the chimney so that the chimney is vertical, and then fasten each rope head with a rope card (the number of rope cards per rope head is not less than three). Only then can the hook be loosened. 5.10.6 The allowable deviation of the verticality of the chimney is 1/1000, and the total length is not more than 20mm. 5.11 Installation of blower and water pump 5.11.1 Before installing the blower, its foundation, silencer and anti-vibration device should be checked and meet the design requirements. 5.11.2 When the blower is installed, the center of its outlet should be consistent with the center of the boiler air inlet. After initial alignment and leveling, the anchor bolts should be grouted and maintained. The installed air duct or air duct should be clean and tight. The opening and closing of the air valve should be flexible and reliable. Test operation should be carried out after the power is turned on. 5.11.3 Installation of water supply pump a. Before installation, the size, location and elevation of the foundation should be reviewed and checked to ensure they meet the design requirements. After the equipment is unpacked and checked, there should be no missing parts, rust, damage, etc., and the turning should be flexible and free of obstructions and jams. b. When hoisting, pay attention to the position of the rope, fix it at both ends of the chassis, and do not tie it to the pump shaft. c. The longitudinal and transverse unevenness of the pump leveling should not exceed 0.1/1000. When measuring, the machined surface should be used as the benchmark. The pump installed as a whole should not have obvious deflection. Grouting maintenance should be carried out after leveling and alignment. d. Before trial operation of the pump. Should be checked. The steering of the motor should meet the steering requirements of the pump, the fastened connections should not be loose, and the specifications, quality, and quantity of lubricating grease should comply with the regulations of the equipment technical documents. Parts requiring pre-lubrication should be pre-lubricated according to the provisions of the equipment technical documents. ； The pipelines of lubrication, water seal, shaft seal, seal flushing, cooling, heating, hydraulic, pneumatic and other ancillary systems should be flushed and kept smooth. ； Safety protection devices should be sensitive and reliable ； Turning should be flexible and normal. Before starting the pump, the pump inlet valve is fully open and the centrifugal pump outlet valve is fully closed. The pump must operate continuously for no less than two hours under the design load. The pump should operate normally, without noise, and the sealing parts should not leak. The temperature of the rolling bearing should not be higher than 80°C, and the temperature of the sliding bearing should not be higher than 70°C to be qualified. 5.12 Installation of the spiral slag tapper 5.12.1 First, hoist the barrel of the spiral slag tapper in the foundation pit, and maintain a certain inclination angle according to the drawing requirements. 5.12.2 Install the ash leakage interface plate on the lower part of the boiler bottom plate. 5.12.3 Install the tapered slag hopper. After tightening the bolts between the slag hopper and the furnace body, tighten the connecting bolts between the ash leakage plate and the slag hopper. 5.12.4 Lift the barrel of the spiral slag discharging machine and connect it to the conical slag hopper. High-temperature resistant padding must be added between the rectangular flange of the conical slag hopper and the rectangular flange of the barrel to prevent leakage. 5.12.5 When installing the lifting lugs and bearing base of the screw slag discharging machine, the screw shaft and the cylinder should be kept coaxial. 5.12.6 Adjust the spring of the safety clutch, use a wrench to turn the worm screw shaft and it should rotate flexibly. Add an appropriate amount of mechanical oil that meets the requirements into the oil tank. 5.12.7 Turn on the power and water source, check whether the direction of rotation is correct, whether the clutch spring jumps, and test run for two hours in a cold state. There should be no abnormal sound or leakage, and the surface temperature of the reduction gearbox shell should not be greater than 50°C. 5.13 Installation of grate transmission device There are two types of grate transmission device: hydraulic transmission and mechanical transmission. Currently, the commonly used chain grate transmission uses hydraulic transmission device. 5.13.1 Hydraulic device installation (see Appendix B. Hydraulic transmission device diagram for details) a. Clean the embedded boards. b. Adjust the vertical and horizontal center lines of the hinge frame to match the vertical and horizontal center lines of the slide rails. c. Push out the piston rod and correct the position of the grate main shaft - balance wheel - hinge frame according to the drawing. Weld the lower rail of the hinge frame to the foundation embedded steel plate, and then carefully adjust the hinge frame to ensure that the clearance between the pull foot and the balance wheel is the same on both sides, and the upper and lower hinges can be driven easily. 5.13.2 Installation of the fuel tank a. The fuel tank is fixed in place according to the drawings. ； b. The inside of the fuel tank must be cleaned. ； c. The oil added to the tank should meet the requirements and be filtered with a 100-120 mesh filter. 5.13.3 Installation of oil pipes a. Before installing oil pipes, the inner walls of the pipes need to be rust-free and flushed, and kept clean. ； b. The installation of oil pipes should comply with the relevant provisions of GB50235-1997 "Code for Construction and Acceptance of Industrial Metal Pipe Engineering". c. For pipes with wire openings, iron filings and burrs must be removed from the joints. ； d. When using copper tubes, anneal the copper tubes first and then expand the copper tubes. ； e. After the oil circuit of the entire hydraulic system is connected, the entire hydraulic system can be flushed with oil with a viscosity of about 2×10 -5 m 2 (20 centistokes) for 20 to 30 minutes. After flushing is completed, drain the flushing oil, clean the fuel tank at the same time, add working oil, and perform an oil pressure test. The test pressure is 1.5 times the maximum allowable working pressure of the system. For safety reasons, do not reach the test pressure all at once. Test in stages. Every time the pressure is increased, it must be checked. After passing the pressure test, the underground oil pipes can be coated with corrosion-resistant paint, and then buried and connected according to the drawings. 5.14 The boiler body and its ancillary devices for drying, boiling and tightness tests have all been installed. The cold test run of the grate has been normal for not less than 8 hours. The test run of the ancillary equipment has passed. After being checked to meet the conditions for steam test of the oven, work can start according to the requirements of the drying oven, boiling furnace and tightness test. 5.14.1 Drying oven The purpose of drying the new boiler is to allow the brick walls of the boiler to dry slowly and not to be damaged during use. a. Close the drain valve system of the sewage valve, main steam valve and water level gauge, open the valve of the water supply system, open a safety valve, start the water pump to feed soft water into the boiler to the normal water level, and after adding water, close the open safety valve ； b. Open the ignition door and use firewood (it is strictly prohibited to use wooden boards with nails), oily cotton yarn or other igniters at the front of the grate. ； c. The flame should be in the center of the furnace, and the combustion should be even and should not be intermittent. Use a wood oven first, and the time is generally not less than 12 hours. During this time, open the flue gas regulating door and use natural ventilation. If the pressure in the boiler rises above one atmosphere, the safety valve should be opened to release steam. If the water level drops, water should be introduced. ； d. To prevent the chain grate from burning out during the oven drying process, it should be rotated regularly. e. After 12 hours in the wood-fired oven, coal can be added for combustion. At this time, the flue gas regulating door and the blast regulating door should be closed, and the induced draft fan should be turned on intermittently for mechanical ventilation. f. When drying the oven, the flue gas temperature should not exceed 50°C on the first day, and the flue gas temperature should not be higher than 160°C in the later period of the oven (the flue gas temperature test point is the flue gas outlet of the boiler body), and the duration within the maximum temperature range should not be less than 24 hours. g. The drying time should be determined according to the humidity level of the boiler itself and the structure of the furnace wall. Generally, for a boiler installed as a whole, it should be 2 to 4 days. When the furnace wall is particularly humid, the heating rate should be appropriately slowed down and the oven time should be extended. h. The actual temperature rise curve should be measured and drawn during the drying process, and the temperature rise curve of the integrated boiler during the drying period should be measured and drawn (see Appendix A). 5.14.2 Boiler The purpose of boiling the boiler is to remove impurities and grease inside the boiler. a. When adding chemicals, the furnace water should be at a low level and there should be no pressure in the furnace.: b. First dissolve the medicine into a solution, open the safety valve seat, and use a temporary dosing pump to send the medicine liquid into the drum through the hose. Pay attention to safety when melting liquid medicine and adding medicine. Operators need to use rubber shoes, rubber gloves and protective glasses to work ； 　　The dosing formula when cooking the stove should comply with the provisions of the equipment technical documents. If there is no provision, it can be specified in Table 4. Note: ①Drugs are calculated based on 100% purity ； ②If trisodium phosphate is not available, sodium carbonate can be used instead. The quantity is 1.5 times that of trisodium phosphate. ； ③When using sodium carbonate boiler alone, the amount is 6kg of sodium carbonate per cubic meter of water. d. The cooking time is generally about 2 to 3 days. On the first day of boiling, the steam pressure should be maintained between 15 and 30% of the boiler's working pressure, and on the second day it should be increased to 50% of the boiler's working pressure. ； On the last day of boiling, the pressure should be maintained at about 75% of the rated working pressure. e. After boiling, drain the boiler water, clear the sediments in the drum and header, flush the inside of the boiler with clean water, and discharge the sewage from the drain valve. ； f. After boiling, the inside of the drum and header should be free of rust spots, grease and welding slag. 5.14.3 Tightness test a. After the boiler is qualified, the manholes and hand holes should be closed, the drain valve should be closed, and the treated softened water should be slowly injected into the drum through the economizer. When the water level in the drum rises to the lowest level of the water level meter, the water supply valve should be closed. After the water level stabilizes, observe whether the water level has decreased. ； b. Open the ignition door, place firewood at the front of the grate and light it. Open the regulating valve of the induced draft fan to ignite the firewood, then manually add coal and turn on the blower. When the coal seam is burning vigorously, you can close the ignition door to add coal to the coal hopper, turn on the grate intermittently, observe the combustion situation, and make appropriate adjustments to the fire so that the coal can burn continuously. After the coal is continuously burned, the blast volume and induced air volume are adjusted to ensure normal coal combustion. ； c. When raising the fire, the furnace temperature should not rise too fast to avoid uneven heating of the boiler causing greater thermal stress and affecting the life of the boiler. —Under normal circumstances, the time from firing to boiler operating pressure should be no less than 3h to 4h. ； d. Pay attention to changes in water level after starting a fire. The water level of the boiler water will rise after it is heated. When it exceeds the maximum water level, the sewage should be drained in time to make the water level normal. ； e. When the boiler is under pressure, the pressure gauge elbow and water level gauge can be flushed. When the pressure rises to (0.1~0.3) MPa, inspect the flanges, manholes, hand holes and other connection parts within the boiler and tighten them in a hot state. If there are no problems, the pressure will be raised to the working pressure. Tightness inspection should be carried out under the working pressure. Manholes, hand holes, valves, flanges and packings should be tight. Only after the tightness test is passed, the safety valve can be adjusted and calibrated. f. Adjust and calibrate the safety valve as specified in Table 5: Note: The values ​​in Table 5 refer to Article 143 of the "Steam Boiler Safety Technical Supervision Regulations" (1996). g. How to adjust the safety valve (spring safety valve): Remove the cotter pin, remove the top cover, loosen the hexagonal locking nut with a wrench, and then twist the adjusting screw to loosen or tighten the spring so that the safety valve meets the exhaust pressure requirements. After adjustment, tighten the locking nut, install the remaining parts, and then jump the safety valve twice in succession. After confirming that it is correct and sensitive, add a lock or seal. During adjustment, the person observing the pressure gauge and the adjuster must cooperate closely. The adjusted safety valve should have no steam leakage or impact. ； After the adjustment of the safety valve is completed, the opening pressure and the adjuster should be recorded in the measurement record. When installing two safety valves, the one with higher exhaust pressure should be checked first. Temporarily adjust the safety valve with low exhaust pressure to be higher than the one with higher exhaust pressure. After the higher pressure safety valve is debugged, debug the lower pressure safety valve. h. After the safety valve is adjusted, the boiler as a whole shipped from the factory should run continuously for 4h to 24h, and the operation should be normal and qualified. 6 Safety technical measures 6.1 The anchor points set when the boiler body is hauled horizontally should be firm. Lifting equipment must be inspected and qualified before use. 6.2 Various oils, paints, rosin water, calcium carbide and other flammable materials used in construction should be placed in a dedicated room to prevent accidents. 6.3 When hoisting the chimney, there should be a hoisting plan. 6.4 When transporting and hoisting fans and water pumps, the ropes must not be tied to the lifting rings of the rotor and the upper cover of the casing or the upper cover of the bearing, but should be tied to appropriate locations. 6.5 In the lifting area or hauling equipment area, non-operators are strictly prohibited from entering the work site. 6.6 During construction, clean up useless things at any time and stack them properly to prevent tripping and injury to people. 6.7 When working on a high stool, the high stool should be properly placed and the lower part should have anti-slip measures or be tied and fixed. 6.8 When working in a semi-enclosed hole, there should be someone outside the hole to contact and monitor. 6.9 Before igniting the boiler, ventilate the furnace to remove flammable gases to avoid detonation. 6.10 During construction, the safety production operating procedures and safety production systems issued by the company and the bureau should be strictly observed. Appendix A (standard appendix) Temperature rise curve during the drying period Appendix B (prompt appendix) Hydraulic transmission device installation diagram 1 Gear pump 2 Straight-through cock 3 Relief valve 4 Solenoid valve 5 Output pipe 6 Ratchet 7 Paw 8 Balance wheel 9 Piston 10 Oil cylinder 11 Stroke bumper 12 Stroke switch frame 13 Stroke switch 4 Embedded steel plate 15 Oil tank 16 Hydraulic transmission device diagram of underground oil pipeline