300MW机组锅炉贫煤改烧烟煤的试验研究  

TEST STUDY ON CONVERTING LEANCOAL FIRED BOILER FOR 300 MW UNIT TO BURN BITUMINOUS COAL

作　　者：胡平凡 尹俊俊[2] 张成[2] 徐远纲[2] 沈跃良 陈刚[2] 

机构地区：[1]广东省粤电集团有限公司,广东广州510630 [2]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [3]广东电力科学研究院,广东广州510600

出　　处：《热力发电》2009年第8期79-82,共4页Thermal Power Generation

基　　金：国家自然科学基金资助(50721005);粤电集团科技项目资助

摘　　要：湛江电厂3号300Mw机组锅炉设计煤种为晋东南无烟煤与贫煤的混煤，拟改烧烟煤，对此进行了热力计算，分析了改烧烟煤对锅炉安全性和经济性的影响。利用热重分析仪和一维沉降炉研究了煤粉细度对燃烧特性的影响，确定试烧期间合适的煤粉细度为15％～20％；提出了3号炉改造方案并进行了试烧，结果表明50％负荷下可无油稳定运行，锅炉热效率可提高2％。The originally designed coal sort for boiler no. 3 of 300 MW unit in Zhanjiang Power Plant was blend coal of anthracitic coal and lean coal produced from South - east Shanxi Province,it is in- tended to convert the said boiler to burn bituminous coal,for this,the thermodynamic calculation has been carried out,and the influence of converting the boiler to burn bituminous coal upon safety and e- conomic efficiency of the boiler being analysed. The influence of pulverized coal fineness upon the com- bustion characters has been studied by using thermo - gravimetric analyser and one - dimentional subsi- ding furnace. It is determined that the suitable fineness of pulverized coal during trial firing period to be 15 %-20%. The retrofit scheme of boiler no. 3 has been put forward,and trial firing is carried out. Results show that the boiler can maintain oil - less and stable operation under load of 50 %, the thermal efficiency of boiler can be enhanced by 2 %.

关 键 词：300 MW机组 锅炉 热力计算 燃烧特性 贫煤 烟煤煤粉细度 

分 类 号：TK16[动力工程及工程热物理—热能工程]