流化床作为生物质气化反应器试验研究

Experimental Study of Biomass Gasification in Fluidized Bed Gasifier

在流化床生物质气化炉内 ,用空气进行气化生物质 (花生壳 )的试验研究 ,分析的参数是当量比ER 0 .2— 0 .4 5 ,气化床的温度 75 0— 85 0℃和加入二次风。当ER在 0 .2 5— 0 .33,气化燃气热值为 6 .2— 6 .8MJ/m3 ,气体产量在 2 6 0— 390m3 /h ,生物质燃烧时比气化产量在 1.2 8— 2 .0 3m3 /kg之间 ,炭转化率在 5 3%— 80 %。并对 7种农、林废弃物进行了初步气化试验研究 ,生成的燃气体积分数 :CO为 14 %— 18% ,H2 一般低于 6 % ,甲烷 4 %— 12 %。燃气热值在 4 70 0— 710 0kJ/m3 。试验结果表明 ,在流化床生物质气化炉中 ,通过在悬浮空间加入二次风 ,可使燃气热值得到提高。

Biomass (peanut shell) gasification with air in pilot fluidized bed gasifier was studied. Parameters analyzed included equivalence ratio 0.2-0.45, temperature of the gasifier bed 750-850℃ and unchanged secondary air in the freeboard. On the basis of optimal equivalence ratio, the gasification experiments were carried out and its results were reported.The heating value of produced gas was 6200-6800 kJ/m^3.The gas yield and carbon conversion were 1.28-2.03 m^3/kg and 53%-80.0%, respectively. The experiments of seven different biomass wastes were also carried out. The component contents of producing gases were: CO 14%-18%, H 2 <6%, CH 4 4%-12%. The heating value of gas was 4700-7100 kJ/m^3.The experimental results show that in fluidized bed gasifier, the addition of secondary air can improve quality of product gas.