当量比对稻草固定床气化性能的影响

Effect of Equivalence Ratio on Gasification Characteristics in a Rice Straw Fixed Bed Gasifier

为了合理利用大量的农林废弃物资源，减少秸秆燃烧造成的温室效应和环境污染，利用自制的气、固、液多联产固定床气化炉对稻草进行气化。研究了当量比对气化炉主要性能参数的影响。结果表明：当量比为0．25时，气化效果较好，此时气化温度为800—850℃，气化气热值达到2．84MJ·Nm^-3，气体得率为1．2m^3·kg^-1，稻草炭得率为24．94％，提取液得率为22．43％，碳转化率为35．31％，冷气效率为24．61％。稻草气化多联产工艺试验为工程化实施提供了基础和基本数据。

In order to take advantage of the large quantity of agriculture and forestry waste biological resources, and reduce greenhouse effect and environmental pollution caused by combustion of rice straw, the rice straw was gasified using homemade poly-generation fixed bed gasifier. The influence of equivalence ratio （ER） on gasification performance was researched. The results showed that under the experimental condition, the best value of ER was 0. 25, the gasification temperature was 800 - 850 ℃, the calorific value of product gas could reach 2. 84 MJ · Nm^-3, the yield of product gas, rice straw carbon and pyrolysis extract liquid was 1.2 m^3 · kg^-1, 24. 94% and 22. 43%, respectively. Carbon conversion efficiency was 35.31%, and cold gas efficiency was 24. 61%. Rice Straw gasification of poly-generation process experiment can provide a theoretical basis for engineering implementation.