双热源煤新型气化机理研究  

Coal gasification principles of double-thermal-source gasifier

作　　者：田玉仙[1] 王晓刚[2] 张亚平[1] 吴敏焕[1] 王喜莲[1] 强军锋[1] 田欣伟[1] 

机构地区：[1]西安科技大学理学院,陕西西安710054 [2]西安科技大学材料科学与工程学院,陕西西安710054

出　　处：《西安科技大学学报》2009年第3期352-357,共6页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(50174046)

摘　　要：以煤和石英砂为原料,在自制双热源煤新型气化炉上实现了煤炭新型气化,测试了气化产物,从气化原料的高温结构相变和气化反应过程热力学分析出发,研究了煤新型气化机理。结果表明:双热源煤新型气化的产物除了富含CO的煤气外,还包括大量SiC副产品,其晶相以3C-SiC(77.99%)和6H-SiC(19.28%)为主,煤气中可燃气体浓度为86.9%～90.5%,产率5.0m3/h;气化炉内不同温区,煤气产生原理不同,0～1400℃温区,煤气主要来源于原料干燥和煤热解反应,1400～2600℃温区,煤气主要来源于多孔焦碳与SiO2(l),SiO2(g)及中间产物SiO(g)的电热还原反应,同时伴生副产品SiC;各气化反应阶段所产煤气总量为该时刻所有温区所产煤气总和。A new coal gasification has been carried out with coal and quartz in our own double-thermalsource gasifier. The products of the new coal gasification were analyzed. Its principles were researched based on the analysis of high-temperature structural phase change of gasification matericals and thermodynamics in the course of gasification, which turned out that besides the gas rich in CO, the products included lots of by-product SiC, among which the proportion of 3C - SiC is 77.99%, 6H - SiC is 19. 28%, the concentration of the combustible gas is 86.9% -90.5%, gas flux is 5 m^3/h ; the principles of producing gas were different in different temperature zones in the gasifier, for example, gas in the temperature zone of 0 - 1 400 ℃ mainly came from the drying of the materials and the reaction of the coal pyrolysis, while gas in the temperature zone of 1 400 - 2 600 ℃ came from the electro-thermal deoxidized reaction between porous coke and SiO2（6）, SiO2（g） or semis SiO（g）. By-product SiC was produced, and the general flow of gas produced in different gasification phrases equaled to the total gas produced in both temperature zones during gasifying.

关 键 词：煤炭气化 反应机理 多热源 气化炉 碳化硅 

分 类 号：TQ53[化学工程—煤化学工程]