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Method for reducing waterwall corrosion in low NO.sub.x boilers
Method for reducing waterwall corrosion in low NO.sub.x boilers
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机译:降低低氮氧化物锅炉水冷壁腐蚀的方法
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摘要
A method to reduce waterwall corrosion in a low NO.sub.x boiler includes the steps of locating a waterwall area of a low NO.sub.x boiler where oxidizing conditions exist and deposition of FeS is likely. The combustion air input at the waterwall area is biased to reduce FeS deposition on the waterwall. The biased combustion air input increases the oxidation rate of FeS.sub.2 so as to reduce FeS deposition on the waterwall. The biased combustion air input may be achieved by increasing the air-to-fuel ratio of one burner while reducing the air-to-fuel ratio of another burner, such that the overall air-to-fuel ratio in the low NO. sub.x boiler is substantially constant.
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