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What are the reasons for the decrease in the gas generation temperature in the drum of a waste heat boiler? How to address it?
1. Has there been any change in the amount of saturated steam coming from the medium-pressure drum? 2. Has there been any change in the flue gas temperature of the plant? Is the flue gas turbine in operation? 3. What is the opening degree of the flue gas bypass line, and are there any abnormalities with the butterfly valve on that line (is there any flue gas leakage)? 4. Are there any abnormalities in the superheating section of the waste heat boiler? 5. Check whether there is significant scaling on the boiler and pipes
A decrease in temperature means less total heat, so it can be considered from the following perspectives: 1. The heat extraction efficiency of the remaining boiler decreases. 2. The temperature of the incoming water decreases. 3. The amount of cooling water injected is too large. 4. The fixed displacement is too large. 5. The amount of flue gas incoming decreases. 6. Flue gas temperature decreases. Then consider each one individually, identify the causes, and take action to address them.