飞灰流化床燃烧脱碳的试验研究  

Experimental Study of Fly Ash Decarbonization on a Circulating Fluidized Bed Combustor

作　　者：梅琳[1] 卢啸风[1] 王泉海[1] 潘智[1] 杨宇[1] 洪勇[1] 方纯全 郭宏 阳向东 

机构地区：[1]低品位能源利用技术及系统教育部重点实验室(重庆大学),重庆市沙坪坝区400044 [2]四川东方锅炉工业锅炉集团有限公司,四川省自贡市643000

出　　处：《中国电机工程学报》2014年第26期4454-4461,共8页Proceedings of the CSEE

基　　金：中国科学院战略性先导科技专项(XDA07030100);江西省科技支撑计划(2012BBG70087)~~

摘　　要：飞灰回燃脱碳效率较低,导致回燃后飞灰仍不能满足综合利用的要求。文中基于飞灰的冷态流化特性,在自行设计的纯然飞灰的热态试验台上进行了燃烧脱碳试验。试验结果表明:CFB飞灰能够在流化床内连续稳定燃烧,维持炉内燃烧的最小截面热负荷约为0.4MW/m2,对应的临界飞灰含碳量为18%。密相区温度和运行床压对飞灰脱碳均有一定的影响。飞灰燃烧后在底渣的增重份额很小,最大不超过15%。试验系统的最大脱碳效率约为75%,远远高于飞灰回燃的脱碳效率。ABSTRACT：Because of the huge difference between original boiler operating conditions and fly ash ideal combustion state, the decarbonization effect is disappointed. Consequently, fly ash decarbonization experiments were carried out on a lab-scale CFB combustor designed base on fluidization properties of fly ash and the decarbonization characteristics were presented. Results show that fly ash requires a minimum sectional thermal load of 0.4MW/m2 for continuous and stable combustion in test combustor, the corresponding critical carbon content in the fly ash is 18%. The carbon content in the fly ash is clearly affected by the dense-bed temperature and bed pressure drop during the combustion process. In addition, the fly ash mass fraction in bottom ash does not exceed 15%. The maximum decarbonization efficiency of the test CFB combustor is approximately 75%, which is much higher than that of FARC.

关 键 词：循环流化床 飞灰 脱碳特性 燃烧 CIRCULATING fluidized BED (CFB) 

分 类 号：TK229[动力工程及工程热物理—动力机械及工程]