煤粉锅炉低温省煤器泄漏的原因分析及对策

通过7#锅炉低温省煤器泄漏的原因,指出主要是灰粒磨损所致,其次为省煤器设计安装时存在烟气走廊使磨损加剧.分析了飞灰磨损的机理,然后分析了影响低温省煤器磨损的5种因素,一是烟气走廊引起磨损的机理;二是管壁材料的影响;三是飞灰浓度的影响;四是过量空气系数的影响;五是烟气成分的变化对磨损的影响.同时提出了减轻及防止省煤器磨损引起泄漏的方法和途径.

Analysis and policies for the leakage of low temperature economizer in coal-fired boiler

This paper analyzes the causes for the leakage of low temperature economizer in No.7 boiler,and that was mainly due to ashes wear,secondly economizer design and installation of the existence smoke corridor,so that the wear is intensified.This paper also analyzes the ash wear mechanism,and then does the effects of low temperature economizer wear five factors: the first is the smoke corridor caused by wear mechanism,the second is the impact on the wall material,and the third is that of flying ash concentration,the fourth of the excess air ratio,and the fifth is the change in the composition of the gas to wear the impact.Meanwhile it offers the ways of reducing wear and leakage in practice.