以通辽发电总厂２号炉改造后膜式省煤器为例，对目前国内外用于膜式省煤器设计计算的若干公式计算的准确性进行了分析比较。并根据模化理论，对膜式省煤器进行了试验台试验，并对照工业性试验结果，提出了一种较为实用的灰污系数选取方法和这种典型膜式省煤器的放热特性关联式 Taking the membrane economizer of No.2 furnace in Tongliao Power Plant as an example, the accuracy of some formulas used in the design and calculation of membrane economizer at home and abroad are analyzed and compared. According to the theory of mold, a test bench test was carried out on the membrane economizer. Based on the industrial test results, a more practical selection method of ash coefficient and the exothermic characteristics of this typical membrane economizer Correlation