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在锅炉燃烧过程中,燃料中的硫分生成二氧化硫,少部分二氧化硫与烟气中的氧化合成三氧化硫、三氧化硫与烟气中的水分结合后生成硫酸雾。当温度低于酸雾露点温度时,就会凝结成硫酸,造成锅炉空气预热器低温段金属腐蚀。为防止空气预热器低温段金属腐蚀,提高其使用寿命,制造厂家通常都根据燃料中含硫量和水分的多少,对进入锅炉空气预热
In the combustion process of the boiler, the sulfur content in the fuel generates sulfur dioxide, and a small part of the sulfur dioxide and the flue gas are oxidized to synthesize sulfur trioxide, and the sulfur trioxide is combined with the moisture in the flue gas to generate the sulfuric acid mist. When the temperature is below the dew point of the acid fog, it will condense into sulfuric acid, causing metal corrosion in the low temperature section of the boiler air preheater. To prevent low temperature metal preheater metal corrosion and improve its service life, manufacturers are usually based on the amount of sulfur in the fuel and water, into the boiler air preheat