The first 4 common failures of the deaerator

First, the deaerator water level is high

There are usually four kinds of causes for the deaerator water level plateau: 1 is the abnormal water level meter; 2 is the high feed system leakage, a large amount of water into the deaerator; 3 is the water level automatic regulation failure; 4 is the water level of the continuous discharge expansion vessel is high, and the water returns to the deaerator; 5 is improper water supply.

There are usually 7 ways to solve the high water level of the deaerator: 1 is to check whether the water level gauge is normal, otherwise contact thermal treatment; 2 is when the water level of the deaerator rises faster, it should be checked immediately to reduce the water intake of the deaerator; 3 If the deaerator water level control valve automatically fails, it should be adjusted manually and contact the thermal personnel to deal with it; 4 alarm when the deaerator water level is high I value; 5 When the deaerator water level is high II value, the overflow gate of the deaerator is combined, the condensate water is recirculated and the condensate pump is closed #3. The condensate pump inverter is adjusted to the minimum flow state. 6 When the deaerator water level is high Ⅲ value, protect and close the four-stage extraction steam electric door, extraction steam reverse check door, auxiliary steam supply deaerator electric door, open the four-stage extraction steam reverse check door and drain door. When the protection is rejected, manually close the four-stage extraction electric door and reverse check door; 7 is when the high plus leakage, to unpack the high plus; 8 is when the water level of the continuous discharge expansion vessel is high, when the deaerator is poured back, the continuous discharge is switched to the fixed discharge.

Second, the deaerator water level is low

There are usually six kinds of causes for the deaerator water level plateau: 1 is the abnormal water level meter; 2 is the water level automatic regulation failure; 3 is the condensate system valve closed or recirculated wrong open; 4 is the deaerator accident water drain door opened by mistake; 5 Condensate or steam condensate, water supply pipe rupture or leakage; 6: The condensate pump is faulty

There are usually 9 ways to solve the low water level of the deaerator: 1 is to check whether the water level gauge is normal, otherwise contact thermal treatment; 2 is when the deaerator water level decreases rapidly, the deaerator inlet door should be opened immediately to increase the water intake of the deaerator; 3 If the water level adjustment door automatically fails, it should be switched to manual adjustment; 4 is to check the deaerator accident discharge door or condensate recirculation door opened by mistake, close it; 5 is the condensate system valve closed by mistake, open it; 6 is to check the condensate water, water supply system for leakage, if the corresponding measures should be taken to stop the leakage; 7 If the operating condensate pump is faulty, it should be switched to the standby condensate pump operation; 8 is when the water level is low I value, should increase the amount of water, and reduce the load according to the situation; 9 is when the water level is low II value, try to increase the water supply, 30 seconds after the feed pump automatically trip, the unit should fail to stop.

Third, the deaerator pressure rises

There are usually five reasons for the deaerator pressure rise: 1 is the abnormal pressure gauge; 2 is the deaerator water level is too low, the intake of steam is too large; 3 is the unit load is too large; 4 is #3 high plus no water level operation; 5 When starting, even exhaust until the deaerator door is open.

There are usually 7 ways to solve the pressure rise of the deaerator: 1 is to contact the thermal check meter correctly; 2 is the deaerator steam intake adjustment door automatic is normal, such as automatic failure should be cut to manual; 3 is the deaerator pressure is high, should check the four stage extraction pressure, auxiliary steam pressure is normal; 4 is to check whether the high water level operation, timely adjust the #3 high water level adjustment door, adjust the high water level normal; 5 If the water intake of the deaerator drops, check the operation of the condensate pump in time and adjust the water intake of the deaerator; 6 When the continuous discharge pressure is too high, properly close the continuous discharge to the deaerator door and adjust the deaerator pressure to normal; 7 Yes When the unit starts, even exhaust until the deaerator door is closed, and then open after the unit runs normally.

Fourth, the body of the deaerator and the connected pipeline vibration

There are usually five reasons for the vibration of the deaerator body and connected pipes: 1. Improper heating during operation; 2 is the deaerator operation into a large number of cold water; 3 is the deaerator depressurization too fast, the occurrence of soft water; 4 is the deaerator external pipeline vibration caused by the deaerator vibration; 5 is the internal failure of the deaerator, such as the nozzle falling off, causing the impact of soda water, resulting in vibration.

There are usually six treatment methods to solve the pressure rise of the deaerator: 1 is the deaerator vibration, should check the deaerator inlet steam, inlet water temperature and condensate flow is matched, and adjust properly to eliminate the deaerator vibration; When the deaerator is heated, the water level should be controlled at 1/3 of the water level, the temperature rise rate should be controlled less than 2℃/min, the auxiliary steam supply deaerator door opening should not be too large, and pay attention to the adequate drainage of the pipeline; 2, when the deaerator temperature is high and the condensation water temperature is very low, the water should be slowed down and the flow rate controlled; 3 is the deaerator depressurization too fast, put into the backup steam source to reduce the deaerator depressurization speed; 4 is to check the causes of vibration of the external pipe of the deaerator and take corresponding measures to eliminate vibration; 5 When vibration is caused by full water, check and close the water door and intake valve on the deaerator, and open the water drain door to reduce the water level; 6 If the internal working parts of the deaerator are damaged, the output of the deaerator should be reduced, and the steam pressure of the deaerator should be kept stable.