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在某工厂热电站锅炉车间的蒸汽锅炉炉膛内,全年燃用天然气、炼焦煤气、高炉气和重油(备用燃料)。所燃用的燃料的热量比为20、30、30和20%。当燃用含硫化氢0.4%的炼焦煤气和含硫0.8%的重油时,混合燃料的硫化物的平均含量等于0.3%。当将锅炉改为燃烧重油时,为了防止管式空气预热器发生低温腐蚀,在蒸发量110吨/时的P—C 锅炉上,于1971年制造和在锅炉对流井之后安装厂建议的带中间载热体的、耐腐蚀的空气预热器,代替原设计的热风器。空气预热器由4只左侧和4只右侧立方体组成,
In a factory boiler plant in the thermal power plant boiler furnace, throughout the year burning natural gas, coking gas, blast furnace gas and heavy oil (spare fuel). The fuel used has a caloric ratio of 20, 30, 30, and 20%. When burning a 0.4% coking gas containing hydrogen sulphide and a heavy oil containing 0.8% sulfur, the average sulphide content of the blended fuel is equal to 0.3%. In order to prevent the tubular air preheater from being subject to low temperature corrosion when the boiler was changed to heavy fuel oil, a factory-installed P-C boiler with a capacity of 110 tons / hour, manufactured in 1971 and installed after the convection well in the boiler The middle of the heat carrier, corrosion-resistant air preheater, instead of the original design of the air heater. Air preheater by 4 left and 4 right side of the cube,