Analysis of Reasons for Over Temperature of #6 Furnace Screen of Guoneng Suzhou 350?MW Unit
The#6 boiler of Guoneng Suzhou 350 MW unit has been experiencing screen over temperature for a long time,with the highest recorded over temperature reaching 625℃(alarm value 555℃).Whether at high or low loads,the over temperature phenomenon has always existed during the start-up and shutdown of the boiler or the start-up and shutdown of the grinding process,and the problem has not been solved.Boiler over burning is the main cause of screen overheating,but the specific situation and reasons for over burning are not very clear.This has also been a long-standing challenge for production and operation personnel and an insurmountable barrier that affects the safe operation of the unit.This article focuses on the analysis of the overheating problem of furnace screen#6,which I have summarized through years of operation adjustment,accident analysis,and on-site research.These research results have been proven to be Appropriate and effective through the analysis of on-site screen overheating adjustment.
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