摘要
介绍了浙江大学开发的循环流化床热-电-气-焦油多联产技术,它通过煤燃烧与热解的有机耦合,利用固体热载体技术,把煤中富氢成分转化成煤气及焦油,剩余半焦送锅炉燃烧,以实现热力、电力、煤气及焦油在1个系统中的联合生产.试验结果表明:流化床气化炉床层温度对多联产系统的煤气成分和热值、焦油的产率和组成均有较大影响.通过考察煤气中H2、CH4和CO等成分的含量以及煤气的热值随气化炉床层温度的变化趋势以及不同温度下焦油的产率,找到了焦油产量最大的运行温度;利用层析和GC-MS分析方法对不同气化温度下产生的焦油成分进行了分析,得到了产生高质量焦油的运行温度.结论:在综合考虑煤气、焦油生产的情况下,应尽量使多联产系统的流化床气化炉床层温度维持在600℃左右.
Circulating fluidized bed heat-power-gas-tar poly-generation technology developed by Zhejiang University was introduced. By combining coal combustion with pyrolysis, the hydrogen-rich components in the coal were converted into coal gas and tar by use of solid heat carrier technology. And the remaining semi-char was burned in the boiler, thus heat, power, coal gas and tar can be co-generated in one system. Results show that the bed temperature of the fluidized bed gasifier has great effect on the constituent and heat value of the coal gas, as well as on the yield and constituent of the tar in poly-generation system. By observing the change of gas composition such as H2, CH4, CO, etc. and gas heat value with the bed temperature of the gasifier and the tar yield at different temperatures, the reasonable temperature with maxi- mum tar yield was found. Using chromatography and GC-MS analysis method, the composition of tar was analyzed at different gasification temperatures, and the operational temperature for producing high-quality tar was found. The conclusion is that the temperature of the fluidized bed gasifier in poly-generation sys- tem should be kept around 600 ℃ if the gas and tar production are comprehensively considered.
出处
《动力工程》
CSCD
北大核心
2009年第8期789-793,共5页
Power Engineering
关键词
热-电-气-焦油多联产系统
煤气化
气化炉温度
煤焦油
heat-power-gas-tar poly-generation system
coal gasification
gasifier temperature
coal tar
