源头提质的高热值垃圾制衍生燃料热解产气特性

Pyrolysis gas characteristics of refuse derived fuel from high heating value waste based on source separation

基于江苏省甪直镇城市生活垃圾源头提质后的高热值组分经过分选、破碎等工艺压制成RDF燃料,利用高温管式炉进行RDF热解实验,研究热解终温、物料配比、催化剂、温升速率和添加辅料等影响因素对RDF的热解燃料气的影响。研究结果表明:热解终温增大,热解效率及气体转化率都增大,温度越高,热解气中H2体积分数增大CO体积分数先减小后增大,CH4体积分数先增大后减小,CO2体积分数减小;随着RDF中生物质含量减小,生活垃圾含量增大,半焦及热解气先增大后减小;添加污泥的RDF热解效率及气体转化率分别增加2.85%和2.62%,CO和CH4体积分数增大,CO2体积分数减小;添加催化剂DHC-32的RDF热解气中H2体积分数大幅增加,CO2体积分数减小。快加热方式热解气产率增大,CO和CH4体积分数增大,CO2体积分数减小。

After separation and crush, the high heating value waste based on source separation from the municipal solid waste in Luzhi, Jiangsu Province was suppressed into refuse derived fuel （RDF）. A pyrolysis experiment was conducted with a high temperature tube furnace, then the effects of terminal pyrolysis temperature, material ratio, catalyst, heating rate and other factors on the pyrolysis gas of RDF were studied. The results show that the pyrolysis efficiency and gas conversion rate increase with the increase of terminal temperature, and the volume fraction of H2 increases, the volume fraction of CO reduces first and then increases, while the volume fraction of CH4 increases and then decreases, the volume fraction of CO2 reduces with the increase of temperature. With the decrease of biomass content in RDF, the pyrolysis tars and gas content increase first of all, and then decrease; adding sludge to RDF, pyrolysis efficiency and gas conversion efficiency share increase by 2.85% and 2.62% respectively, the volume fractions of CO and CH4 increase, the volume fraction of CO2 decreases. The pyrolysis gas volume fraction of H2 increases dramatically with adding catalysts DHC-32 to RDF, while the volume fractions of CO2 decrease; the yield of pyrolysis gas increases at fast heating rate, the volume fraction of CO and CH4 increases, while the volume fraction of CO2 reduces.