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Start-up operation of the blower

2010-09-20View Original

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Operation to start the blower: 1. The workshop supervisor issues the command to start the blower, and the on-duty shift leader oversees the starting process. 2 shall communicate with the dispatching office, substation, riser pipe, and back-end positions to inform them of the startup time. 3 With the assistance of electricians and fitters, check whether all equipment is in good condition. Check that the oil level in the oil tank of the oil pump station is within the specified range, that all instruments are in good condition, and that the water seal tank of the blower is filled to capacity, and report to the shift supervisor. 4. Check the oil temperature in the blower oil station and the hydraulic coupler; activate the heater when the temperature is below 5°C, and activate the oil cooler when it exceeds 40°C. 5. Notify the electrician to supply power, and start the oil pump for the blower’s oil station as well as the auxiliary oil pump of the hydraulic coupling (the blower’s oil pump has pumps A and B; when pump A is in use, the knob for automatic startup of the oil pump should be set to the “A in use, B standby” position, while when pump B is in use, the knob should be set to the “B in use, A standby” position). 6. Check whether the oil pressure in the blower oil circuit and the hydraulic coupler oil circuit systems is normal. 7. Check whether oil is returning to each oil supply point of the blower and the hydraulic coupler, as well as to the high-level oil tank. 8 Monitor and ensure that the cooling water pressure in the oil cooler is slightly lower than the oil pressure. Drain the liquid from within the 9-row exhaust blower unit and the gas pipelines. After drainage is complete, use steam to preheat the blower through its drain pipe; once the temperature of the unit reaches 70°C, turn off the steam. Allow liquid to drain for about 1 minute before closing the drain pipe of the blower unit. 10. Close the clutch of the electric turning gear unit and start the turning gear motor to rotate the shaft. 11. Observe whether the blower’s cranking operates smoothly; once the fitter confirms there are no issues, stop the cranking motor and disengage the clutch of the cranking device. .12 Set the control switch of the hydraulic coupler electric actuator to the “manual” position, and ensure that the manual lever of the hydraulic coupler is in the “0” position. 13 Open the blower outlet valve and inform the substation to supply power. 14 Start the blower motor. 15 Gradually increase the speed of the hydraulic coupling, and monitor and maintain the blower’s speed at over 2400 revolutions per minute. 16. Gradually open the gas inlet valve of the blower to 70%, and at the same time use the hydraulic coupling control button to keep the pressure in the suction manifold ahead of the machine within the specified range; when starting up or when the amount of gas is insufficient, it is possible to slightly open the large circulation loop. After the suction force in front of machine 17 and the pressure in the gas collection pipe have stabilized, open the drain valve on the blower unit. .18 Stop the auxiliary oil pump when the pressure gauge P after the oil filter reads 0.2~0.25 MPa. .19 Notify the control room and plant dispatch that startup is complete. If there are any shortcomings, please feel free to point them out! !
Reply #22010-09-20
The document upstairs overlooked many details; there is a problem with item 16. Regarding the starting conditions for blowers/compressors, it is necessary to minimize the power required by the drive motor during startup, especially in units that use hydraulic couplings as speed control devices, as the efficiency of hydraulic couplings is extremely low at low speeds. This results in a higher starting power for the motor. Therefore, when starting the unit, it is important to follow the correct sequence of operations, as follows: 1. First, open the inlet valve to a small degree – around 10% of its full opening. 2. Start the unit, avoiding operation at low speeds for extended periods of time. 3. Reach the operating speed range. 4. Finally, open the inlet valve fully
Reply #32010-09-20
Reply to 2# leadlife: The original poster clearly has no experience with adjustable hydraulic couplings. I think the procedures outlined in point 16 are sufficient to meet the technical requirements and to ensure the safe operation of the equipment. The adjustable hydraulic coupling has no load when the electrical equipment is started. Following the procedures outlined in point 16, i.e., opening the valve while applying load to the coupling, I really don’t see anything wrong with this approach.
Reply #42012-10-07
Are there fans equipped with frequency converters? After installing an inverter on this fan, it’s much easier to start it, operate it, and make adjustments!

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