Simulation of gasification characteristics from municipal solid waste under different moisture content
The moisture content of garbage in different regions of China is very different.This study explored the influence of moisture content on gasification characteristics of municipal solid waste(MSW),aiming to further realize its resource utilization.Based on Aspen Plus,a process model of waste gasification was established,and the effects of temperature on the composition of gasification synthesis gas,carbon conversion(CCE),low calorific value(LHV),and gas yield under different moisture content were analyzed.Results showed that the increase of gasification temperature promoted the first decrease and then increase of both CCE and LHV.Raised temperature and increased moisture content was observed to promote CCE while reducing LHV.Below 650℃,the increase of moisture content would promote the gas yield.However,above 650℃,it showed the opposite effect.A comprehensive analysis of gasification indexes revealed that the optimal condition was obtained with a moisture content of 25%and a gasification temperature of 850℃.On this basis,40.63%combustion of gas production could provide heat for drying,pyrolysis and gasification stages to achieve heat self-sufficiency of the system.Moreover,when the gasification temperature and combustion ratio of gas production remained unchanged,the heat released by the gasification system increased firstly and then decreased as the waste moisture content rose.
国家科技期刊平台
NSTL
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