城市生活垃圾热解焦对热解焦油的影响

摘要

The effect of char from Municipal Soild Waste (MSW) on pyrolysis oil was explored by means of a fixed bed reactor and gas charomatography-mass spectrometer (GC-MS).The products distribution and compounds of pyrolysis oil were investigated and analyzed.The result shown that when the temperature increased to 600 ℃,the yield of pyrolysis oil was 38.38％.When the char added up to 30％,the yield of pyrolysis oil reduced to 31.79％,the oxygen-carbon ratio of pyrolysis oil fallen from 0.20 to 0.10 and calorific value increased from 30.24 MJ/kg to 35.81 MJ/kg.The catalytic effect of char on pyrolysis oil was reduced when the ratios of char above 30％.When the char added up to 30％,the contact of the alcohols and carboxylic acids of pyrolysis oil were decreased by 19.18％ and 13.73％ respectively and the content of the esters and fatty hydrocarbons were increased by 27.69％ and 5.63％ respectively.The quality of pyrolysis oil improved by adding 30％ char and the pyrolysis oil achieve heavy oil lightening.%为研究城市生活垃圾热解焦对城市生活垃圾热解焦油的影响,采用固定床对添加不同比例的城市生活垃圾热解焦的城市生活垃圾进行热解实验.实验结果表明:未添加热解焦时,城市生活垃圾热解焦油产率为38.38％;当热解焦添加比例为30％时,焦油产率为31.79％,焦油中的O/C由0.20下降到0.10,焦油热值由30.24 MJ/kg升高到35.81 MJ/kg;当热解焦添加量超过30％时,热解焦对热解焦油品质的改善作用减弱.利用GC-MS对热解焦油分析发现,热解焦添加比例为30％时,热解焦油中醇类和羧酸类分别下降了19.18％和13.73％,酯类和脂肪烃类分别增加了27.69％和5.63％.热解焦明显改善了热解焦油的品质,实现了一定程度的轻质化.