Experimental Study On High Temperature Corrosion Of Likeng Refuse Incineration

Now the industrial developed countries are mainly committed to improving the original incinerators and developing new incinerators for high efficiency of generating units, high steam parameters, energy saving and low pollution. For example, the NEDO project in Japan has developed new waste heat boiler technology with a30%higher effiency which can steadily supply10Mpa,500℃steam; the newly-built waste to energy power plants in America also adopt high temperature high pressure steam operating conditions(10Mpa,500℃) in pursuit of high efficiency power generation.Almost all the domestic WTEPPs which have been put into operation and under construction adopt medium temperature medium pressure steam parameters(4Mpa,400℃) in order to prevent the heating surfaces of boiler from high temperature corrosion. With the popularization of BOT investment pattern in waste to energy industry, the competition is increasingly fierce, and in pursuit of enterprise benefit maximization, how to improve generating steam parameters and power generating efficiency have been on the agenda. Some domestic WTEPPs (e.g. Shen Neng Yuan, Chuangguan) adopt medium temperature intermediate pressure technology in succession to Likeng Waste to Energy Power Plant I, which has caused a fever of medium temperature intermediate pressure technology application. However, in2009. since several tube ruptures of boiler waterwall and slag screen in Likeng Waste to Energy Power Plant I, people pay high attention to research high temperature corrosion of boiler heating surfaces. How to make effective control over high temperature corrosion of boiler heating surfaces based on improved generating steam parameters and power generating efficiency is of great significance.This article is based on Guangzhou Likeng Waste to Energy Power Plant I, with reference to other domestic boiler corrosion phenomena and operating conditions, makes an analysis on corrosion mechanism of WTEPPs. By comparing operating conditions changes before and after several tube rupture in Likeng Waste to Energy Power Plant I ever since it’s put into operation, through different tests and operation data analysis, this article presents a conclusion of the main influence factors which cause the severe high temperature corrosion and frequent tube rupture. Based on the influence factors, this article finally put forward corrective actions and prevention methods, verify the effectiveness of the actions in the WTEPP.