Application Research Of Precipitator On Large Sized Coal-fired Power Units

Currently,reduces the dust discharge has been an important national policies. Coal combustion is one of the main reason of dust pollution in China.To choose which type precipitator is an important problem for satisfied the environmental protection request on coal-fired power plant.Electrosfatic precipitator has been dominant in the power industry. Along with the unremittingly progressing of fabric technique, more and more power plants choose fabric filter or electric-fabric filter.The last few years, environmental protection requests have been raised continuously.The new standard 《Emission standard of air pollutants for thermal power plants^has been used on January1,2012. The precipitator chose according to the old srandard already can not satisfy the request of new standard,so rehabilitation programs need to choose.At the same time,the new fire power plant have to choose new precipitator in order to satisfiedthe new standard.This thesis research and contrast electrosfatic precipitator, fabric filter and electric-fabric filter in the structure>. pattern,principle of work and technique characteristics...etc. We realized the characteristics of all kinds precipitator and find out the operating effect on the scene, We analysis and contrast the applied prospect and orientation scope of new dust collecte technique at large power plants and propose the suggestions of new technology applications;By the way of analyse the performance of various filter, we prospect the recommendation project to choose filters bag for different smoke spirit circumstance;By the way of analysised to various standpoint and experiment result, we pose a problem-solving recommendation project to solved adverse effects caused by the ozone for filters bag.This thesis studies with difference new power plants and active plants, compared the precipitator from the technique characteristics, equipments beginning investment, operating expenses, security and dependability and area of occupy,etc.Through this comparison, according to different coal quality of different power plants, we put forward the recommendation project of precipitator chooses type.