等效焓降法在烟气余热换热器节能中的应用

等效焓降法是基于热力学的热功转换原理。本文用等效焓降的方法分析了热力系统加装烟气换热器的节能效果。论证了锅炉余热的热经济性效果，并以600MW机组为例，对凝结水返回系统不同位置的四种方案进行了比较。最后通过定量计算得出加装烟气余热换热器对热力系统节能的重要作用。对工程实践有重要的指导意义。

The analysis of the heat exchanger in the flue gas waste heat based on the equivalent enthalpy drop method

Equivalent enthalpy drop method is based on the thermodynamics of the thermal power conversion principle.In this paper,the equivalent enthalpy drop method to be analyzed in the energy saving effect of the thermal system retrofitted with flue gas heat exchanger,and talk about the waste heat of the hot economic effects in the boiler.Take 600MW units for example,compared with the four options about condensate return system at different positions,it could found to retrofitted with flue gas waste heat exchanger play an important role in the energy-efficient thermal system.It could make important guide significance for the engineering practice.