Start-up problems of the main blower in a fluid catalytic cracking unit
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The main fan in a catalytic cracking unit consists of an active unit and a standby unit; the active unit is equipped with an exhaust fan, while the standby unit does not have one. The standby machine is currently in operation, and we are preparing to switch to the main machine. I would like to ask everyone: is it usual to preheat the smoke extractor first and then start the main motor, or to start the main motor first and then preheat the smoke extractor? :):)
Preheat the smoke extractor first, and then start the main motor after it has started rotating. This ensures the smooth operation and switching of the smoke extractor and the main motor. .
Is this method suitable for all operating conditions? Recently, problems arose when performing this operation, and upon consulting the manufacturer, they replied that it is not allowed to do so. But this has always been the way it’s been done in the past, and no problems have arisen. Are there any prerequisites?
Whether the operating method is suitable depends on the specific device design and the manufacturer’s guidelines. There may be prerequisites, such as the maintenance status of the equipment, environmental factors, and the degree of equipment aging. It is recommended to consult the manufacturer for detailed operating instructions and to learn more about any special requirements or limitations of your equipment, so as to ensure safe and efficient operation. At the same time, regular maintenance and inspections of the equipment should be carried out to avoid potential problems. .
Surely, the smoke machine should be turned on first; if the main fan is driven directly by the motor, the starting current will be very high, and the power system won’t be able to handle it.
For motors equipped with a capacitor-based soft-start cabinet system, it is necessary to thoroughly evaluate the feasibility of this starting method before use, in order to prevent damage to the soft-start cabinet. Or, cut out the soft start cabinet and have it pulled up by the exhaust fan.