循环流化床高浓度富氧燃烧试验研究  

Experimental Study on Oxy-fuel Combustion With High Oxygen Concentration in a Circulating Fluidized Bed

作　　者：谭力[1] 李诗媛[2] 李伟[1] 寿恩广 吕清刚[2] 

机构地区：[1]中国科学院大学,北京市石景山区100049 [2]中国科学院工程热物理研究所,北京市海淀区100190

出　　处：《中国电机工程学报》2014年第5期763-769,共7页Proceedings of the CSEE

基　　金：中国科学院战略先导科技专项(XDA07030200);国家自然科学基金项目(50906084);中国科学院国际合作局对外合作重点项目(GJHZ201301)~~

摘　　要：在0.1 MW循环流化床富氧燃烧试验系统上，进行了大同烟煤在O2/再循环烟气（RFG）和O2/CO2配气下的高浓度富氧燃烧试验，研究燃烧温度和气氛对燃烧稳定性、烟气中CO2浓度和气体污染物排放的影响。研究结果表明，O2/RFG气氛下，在一次风氧气浓度为49.6%-55.2%、二次风氧气浓度为45.3%-51.7%范围内，循环流化床能够稳定运行，烟气中CO2浓度达到90%以上，SO2浓度为87-197 mg/MJ，N2O浓度为48-78 mg/MJ，NO仅为19-44 mg/MJ。与O2/CO2配气燃烧相比，O2/RFG燃烧时除NO浓度基本不变外，CO与SO2浓度均有一定程度的增加，而N2O浓度则明显降低。In order to investigate the effects of combustion temperature and atmosphere on the combustion stability, CO2 concentration and gaseous pollutants emissions in flue gas, in a 0.1 MW circulating fluidized bed （CFB） oxy-fuel combustion facility, oxy-combustion experiments with Datong coal were carried out at O2/CO2 and O2/ recycled flue gas （RFG） atmosphere with high oxygen concentration. The test results show that when the oxygen concentration of the primary air ranges from 49.6%to 55.2%and that of the secondary air is in the range from 45.3%to 51.7%, the CFB oxy-fuel combustion facility maintains stably at O2/RFG atmosphere. In flue gas, CO2 concentration can reach above 90%, SO2 concentration is 87 to 197 mg/MJ, N2O concentration is 48 to 78 mg/MJ, and NO concentration is only 19 to 44 mg/MJ. Compared with the result of O2/CO2 combustion, the concentration of CO and SO2 increases to a certain degree, while N2O concentration decreases obviously, and NO concentration basically remains the same.

关 键 词：循环流化床 富氧燃烧 烟气再循环 煤 气体污染物 

分 类 号：TK16[动力工程及工程热物理—热能工程]