生物质回转窑水蒸气气化制富氢气体试验研究

The experimental study on hydrogen-rich gas from catalytic steam gasification of biomass in a rotary kiln reactor

为充分回收高温炉渣颗粒的余热，设计了回转窑热解反应装置。为验证此装置的可行性，对生物质气化制氢进行了试验研究，并对影响气化性能的主要因素，如气化温度（650～950℃）和水蒸气／生物质当量比S／B（O～3．0）进行了研究。结果表明：温度是影响生物质气化反应的主要因素，高温可以降低焦油和焦炭产率，提高气体产量，增加燃气中氢气含量；水蒸气的加入，有利于焦油和低分子碳氢化合物的气化重整以及焦炭的反应，降低焦油产量，提高气体产量，增加燃气中氢气含量，但是过量的水蒸气会导致反应器内温度下降，不利于反应进行。当S/B为2．20时，气化燃气中氢气含量达到最大值53．6％。

To recyle the waste heat of blast furnace slag, this paper designs a lab-scale biomass gasifi-cation reactor the rotary kiln device.In order to evaluate the feasibility of the equipment,the mainfactors influencing the pyrolytic characteristics were studied, such as temperature varying from 650 to950 and the ratio of steam to biomass （S/B） from 0 to 3.0. The results show that temperature has signifi-cant influences on gasification performances. Highter temperature contributes to less amounts of tar,coke and improve hydrogen production. The introduction of steam improves the dry gas yield and car-bon conversion efficiency, however, excessive steam will lead to lower hydrogen content and degradefuel gas quality. As S/B being 2.20,the hydrogen content reached the maximum 53.6%.