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本文叙述了燃料中的含硫量与烟气中的 SO_2含量的关系;燃料中含硫量和 SO_2转化成 SO_3的转化率的关系;以及烟气中水蒸气含量、SO_3浓度和酸露点之间的关系.指出高温高浓度硫酸的腐蚀不同于通常大气中的腐蚀。在高温高浓度下,不但普通钢材,而且连不锈钢也要受到激烈腐蚀.着重介绍了热管具有能在很小的温差下传递很大的热负荷,而且吸热端与放热端的管壁温差很小的特点。利用热管所构成的省煤器,同空气预热器一样,可用于较低烟温区段回收热量,而不致于在管壁结露、积渣造成低温损失.
This paper describes the relationship between the sulfur content of fuels and the content of SO2 in flue gas, the relationship between the sulfur content in fuels and the conversion of SO2 to SO3, and the relationship between water vapor content, SO3 concentration and acid dew point in flue gas The relationship between high temperature and high concentration of sulfuric acid is different from that of normal atmospheric corrosion. In the high temperature and high concentration, not only ordinary steel, but also have been subject to severe corrosion of stainless steel.With emphasis on the heat pipe has a small temperature difference in the transmission of a large heat load, and the heat absorption end and exothermic end of the pipe wall temperature difference is very Small features. The economizer with heat pipe, like the air preheater, can be used to recover heat in the lower smoke temperature section without dew condensation on the pipe wall, resulting in the low temperature loss caused by slag accumulation.