燃煤锅炉防结渣复合陶瓷涂层技术应用  

Application of anti-slagging composite ceramic coating in coal-fired boilers

作　　者：王进卿[1,2] 袁益超[2] 黄国强 池作和[1] 张光学[1] 赵凯[1] WANG Jinqing YUAN Yichao HUANG Guoqiang CHI Zuohe ZHANG Guangxue ZHAO Kai(College of Metrological Technology and Engineering, China Jiliang University, Hangzhou 310018, China Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China Yixing Thermal Power Co., Ltd. of CR Power, Yixing 214200, China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018 [2]上海理工大学上海市动力工程多相流动与传热重点实验室,上海200093 [3]宜兴华润热电有限公司,江苏宜兴214200

出　　处：《热力发电》2017年第6期75-79,87,共6页Thermal Power Generation

基　　金：国家自然科学基金(51408574);浙江省教育厅科研项目(Y201534242);浙江省"仪器科学与技术"重中之重学科人才培育计划项目资助~~

摘　　要：针对某台260 t/h燃煤锅炉沾污结渣问题,在受热面喷涂防结渣复合陶瓷涂层,根据结渣部位,结合热力计算方法,得出最佳喷涂区域为从下二次风底部往上12 m的四周水冷壁,面积约为400 m2。喷漆后运行3个月的统计结果显示:锅炉的沾污结渣情况明显改善,炉膛温度显著降低,月吹灰频次下降95.5%,减温水量下降34.5%;但存在飞灰及炉渣含碳量增加问题。对此,可采用降低煤粉细度等方式改善。本文研究结果可为解决锅炉结渣问题提供较好途径。To solve the fouling and slagging problems of a 260 t/h coal-fired boiler, composite ceramic coating was prepared on the heating surfaces of the boiler. According to the slagging position and by use of thermodynamic calculation method, the best spraying area was obtained, namely the water wall which covers 12 meters along furnace height from the bottom nozzles of the secondary air and has an area of 400 m2. The boiler statistical running results after three months＇ service show that, the fouling and slagging situation of this boiler has significant improvement. The furnace temperature is significantly decreased. The monthly blowing frequency of soot blowers is decreased by 95.5%, and the quantity of desurperheater water is reduced by 34.5%. However, this boiler exists the problem that the carbon contents of fly ash and furnace slag are increased after spraying job. The problem can be improved by reducing the coal fineness and other methods. The composite ceramic coating technology provides a better way to solve the problem of boiler slagging.

关 键 词：燃煤锅炉 受热面 沾污结渣 复合陶瓷涂层 热力计算 

分 类 号：TK08[动力工程及工程热物理]