【Q&A Question 095】April 05, 2017
Thread Content
【Q&A Question 095】April 5, 2017: What are the main items to be inspected for a circulation pump? (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) After *replying*, the reference answers will be visible; scoring is granted by identifying the key points. 1. Lubricating oil inlet pressure and outlet temperature at the driven end and the non-driven end of the turbine. 2. Lubricating oil inlet pressure and outlet temperature at the driven end and the non-driven end of the compressor. 3. Oil level, pressure, temperature, etc., of the auxiliary oil pump system. 4. Turbine speed. 5. Pressure in the main lubricating oil pipeline, steam inlet pressure, exhaust gas pressure, pressure in the turbine chamber, starting oil, secondary oil, control oil, etc. 6. Flow rates at the high and low pressure ends as well as the discharge flow rate of the dry gas seal. 7. Liquid removal from the dry gas seal. 8. Listening to the operating sounds of the unit. Summary thread of Q&A questions for 2017 (updates ongoing): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary thread of daily questions for 2017 (updates ongoing): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary thread of Q&A questions for 2016 (updates completed): http://bbs.hcbbs.com/thread-1597792-1-1.html Third-phase selection competition for outstanding management members at HaiChuan: http://bbs.hcbbs.com/thread-1655902-1-1.html (Source: HaiChuan Chemical Industry Forum)
Inlet and exhaust valve temperatures, inlet and exhaust pressures, inlet and exhaust temperatures, lubricant level, lubricant pressure, motor temperature, presence of abnormal noises, presence of leakage points
Is there surge? Pressure fluctuations. Lubrication system
Import and export pressures, bearing shell temperature, oil level, vibration, leaks
I’ll just use the previous restored copy. . . . . . . . . I. The routine inspection items are basically as follows: 1. Check the lubricating oil pressure, which should be within the normal range. 0.2-04MPa 2. Check that the cooling water discharge temperature is ≤37～40℃. 3. Check the temperature of the lubricating oil in the engine’s oil sump; it should not exceed 60°C. 4. Check the temperature of the main shaft bearing pads; it should not exceed 70°C. 5. Check the exhaust temperature; it should not exceed the set value. 6. Check the exhaust pressure; it should not exceed the set value. 7. Check whether the instruments in the automatic control section are functioning properly ； Is the ammeter reading normal? 8. Check whether the intake valve cover is hot and whether the sound of the valve is normal. 9. Pay attention to listening for any unusual noises or impacts as the various components operate. 10. Eliminate oil, water, and air leaks in all areas. 8 11. Keep records of the compressor’s operating conditions. II. Pressure of nitrogen-air protection and whether it is operating properly: n) i5 x; ^4 l 2. Conditions such as the sound, temperature, and vibration of the shaft-mounted pump. 3. Check the temperature and sound of the intake and exhaust valves. 4. Temperature and abnormal noises at the end caps of the piston cylinder; y- v5 h% F2 C/ z& j" S 5. When checking the standby compressor, make sure to turn the loading/unloading device to the loading position (the main purpose is to prevent the rubber gaskets inside the device from being under stress for long periods, which could affect their service life). 6. The jacket water systems in all areas are operating normally
1. Lubricating oil inlet pressure and outlet temperature at the drive end and non-drive end of turbines and compressors； 2. Auxiliary oil pump system ； 3. Turbine speed ； 4. Dry gas seal ； 5. Listen to the sound of the unit in operation.
Flow rate of primary seal gas, pressure of primary leakage gas flow, flow rate of secondary seal gas, pressure in the lubricating oil main line, control oil pressure, secondary oil pressure, whether there are any abnormal noises in the machine, any leaks, pressure and temperature of medium-pressure steam, backpressure steam pressure
⒈Is the operating sound of the pump abnormal?； ⒉Are the vibrations and temperatures of the bearings (motor bearings and pump bearings) normal? ； ⒊Is the motor current within the normal range? ； ⒋Is the pump outlet pressure within the normal range?
Lubricating oil pressure； Exhaust temperature ； Lubricant temperature ； Cooling water pressure and temperature
1. It should also include the pressure of the backpressure steam (interlocks are crucial for this). 2. Discharge pressure. 3. Filter pressure drop. 4. Pressure of control oil and secondary oil. 5. Check for hydrogen leaks in the dry gas seal system. 6. Inspection of the booster pump system
By using sight, touch, hearing, and smell, as well as tools such as thermometers, vibration meters, and sound detectors, regular or targeted irregular inspections are carried out on equipment that is in operation or has defects. This allows for the collection of data on parameters such as temperature, pressure, flow rate, vibration, friction, current, voltage, and power related to the equipment and working fluids. The goal is to identify and eliminate abnormalities, defects, and other factors that could affect safe and stable operation. Of course, inspections also involve aspects related to safety, fire prevention, and theft prevention; however, for companies, the former aspects are more important. In the case of steam turbines, the main focus of inspections is to check, based on the information listed in the records, whether the readings from remote instruments match those from local instruments, and to identify any discrepancies. These data are then analyzed to detect abnormalities and defects that could impact safe and stable production, thereby providing a basis for further analysis and corrective actions during the production process.