Analysis and Treatment Measures for Ash Accumulation in the Rear Passage of Blast Furnace Gas Boiler
After the second phase high-pressure gas boiler of Angang Yongtong Company was put into operation for a period of time,the resistance of the entire rear flue increased,the negative pressure of the furnace could not be pulled up,and the technical parameters of the boiler operation were limited.Relevant technical personnel analyzed that the main reasons were an increase in dust content in the flue gas,blockage of micropores in the denitration catalyst module,high moisture content in the denitration ammonia gas,and accumulation of ammonium bisulfate on the heating surface of the air preheater and condensate heater,ultimately leading to severe flue blockage.By strengthening gas purification,optimizing the ammonia injection device,using maintenance to clean the micropores of the catalyst removal module,flushing the economizer and air preheater with water,the resistance of the rear flue is restored to normal,and the boiler returns to normal operation.
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