固定床生物质富氧气化中试实验研究

EXPERIMENTAL STUDY ON OXYGEN RICH BIOMASS GASIFICATION IN A PILOT SCALE FIXED BED GASIFIER

以木块为原料,利用下吸式固定床气化器进行富氧气化的中试实验。研究不同气化剂、富氧浓度以及气化温度对气化结果的影响。分析富氧气化使气体热值升高的原因以及影响气化产出气中CO2含量的因素。结果表明,随富氧浓度的增加,热值呈上升趋势,较空气气化热值增长1倍,产出气中CO、H2明显增加,但富氧浓度超过90%后对气体热值的贡献不大;产出气中CO2含量受富氧浓度、当量比以及当量比对气化温度及其气体热值的影响;同时针对物料特性和气化器本身材料的限制得出了该炉型的适宜气化温度为1100℃。

The pilot scale experiment on wood oxygen rich gasification in a down draft gasifier was carried out. The influence of the different gasified medium and oxygen concentration and temperature of gasification was studied. The reason of the gas heat value rise when the oxygen rich gasification was used and influence factors of CO2 gas from the gasification. The result showed that the gas heat value presented the trend of rise along with the increase of oxy- gen rich concentration at least double for the air gasification. The CO, H2 increased obviously, however the gasheat value do not rise as the oxygen rich concentration exceed 90% ; The contents of CO2 was influence by oxygen con- centration and ER ; The effect of ER on gasification temperature and gas heat value ; And conclude the proper tem- perature of gasification were 1100℃, in view of material characteristic and limit of equipment material.