两段气化对降低生物质气化过程焦油生成量的影响

Research on the Influence of Two Stage Gasification on Reducingthe Tar Content of Gas of Biomass Gasification

在分析焦油生成和裂解的有关机理的基础上,研究开发了两段气化装置,对一段供风和两段供风气化过程进行了大量的对比试验,探讨了温度分布和气化强度等因素对气化中焦油含量的影响。研究结果表明,在同样的试验条件下,两段供风显著提高了气化炉内的最高温度和还原区的温度,气体中焦油的含量仅为常规供风方式的1/10左右,改善了气化机组的性能。

The high tar content in gas is a major factor affecting the normal running of whole gasification system.On the base of the mechanics of tar producing and pyrolyzing,this paper put forward twostage gasifier,and probed into the influence of factors such as temperature distribution and specific gasification rate on tar content of gas experiment.The experimental results indicate that twostage gasification can greatly increase the highest temperature and that of reduction zone.The tar content is only 1/10 of that of one stage gasification.So twostage gasification can obviously improve the performance of the gasifier.