81. Briefly describe the steps to shut down the smoke extractor?
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81. Briefly describe the steps to shut down the smoke extractor?
1) First, initiate a reactive response by reducing the pressure in the regenerator within the range controlled by the anti-surge regulator, and adjust the inlet angle of the main fan accordingly to lower the current drawn by the main motor, thereby preventing overcurrent in the main motor after the smoke extractor is shut down. 2) Gradually reduce the load on the smoke extractor; control the rate of temperature drop until the butterfly valve is fully closed. Adjust the cooling steam to maintain an appropriate temperature of the rotor disk； 3) When the casing temperature drops, open the base drain valve and use the exhaust fan for venting ； 4) Open the valve of the smoke exhaust circulation line.
1) First, initiate a reactive response by reducing the pressure in the regenerator within the range controlled by the anti-surge regulator, and adjust the inlet angle of the main fan accordingly to lower the current drawn by the main motor, thereby preventing overcurrent in the main motor after the smoke extractor is shut down. 2) Gradually reduce the load on the smoke extractor; control the rate of temperature drop until the butterfly valve is fully closed. Adjust the cooling steam to maintain an appropriate temperature of the rotor disk； 3) When the casing temperature drops, open the base drain valve and use the exhaust fan for venting ； 4) Open the smoke extractor flue gas circulation line valve ；