霍钰1,
孙翔1,
韩彪2,
刘峥1
1.广西大学资源环境与材料学院，南宁 530004
2.广西壮族自治区环境保护科学研究院，南宁 530004
基金项目: 广西自然科学基金回国基金项目（2016GXNSFCA380027）
广西重点研发计划（桂科AB16380253）
广西大学青年博士科研启动基金项目（XBZT161052）
Effect of ash derived from municipal solid wastes on pyrolysis behaviors and kinetics of biomass
MA Dachao1,HUO Yu1,
SUN Xiang1,
HAN Biao2,
LIU Zheng1
1.School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
2.Scientific Research Academy of Guangxi Environmental Protection, Nanning 530004, China
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摘要:生活垃圾热解焚烧产生的热灰渣可以作为热解过程的热载体。为研究灰渣对生活垃圾中生物质热解的影响，在热重分析仪中将生活垃圾的典型组分木屑和纸屑分别与2种垃圾灰渣混合热解，并进行热解动力学研究。结果表明，城市生活垃圾的热解焚烧炉灰渣（A灰）可以提高木屑和纸屑的热解转化率，比理论值高出4%~5%。农村生活垃圾热解焚烧炉的灰渣（B灰）对纸屑热解具有促进作用，但对木屑的热解没有显著影响。动力学研究表明，混入A灰后，木屑热解的第1、第2阶段的表观活化能都大幅降低，与其提高木屑的热解转化率的结果相一致。B灰也使得木屑的热解第1阶段活化能降低。此外，A灰和B灰均可以显著降低纸屑第1段热解的活化能。
关键词: 生活垃圾/
生物质/
灰渣/
混合/
热解/
动力学
Abstract:The ash derived from the municipal solid waste (MSW) after pyrolysis and incineration can be used as heat carrier during the pyrolysis process. To investigate the influence of ash on biomass pyrolysis in MSW, wood or paper, typical biomass in the MSW, was blended with two types of MSW ash (ash-A and ash-B) to conduct pyrolysis and test the pyrolysis kinetics in the thermo gravimetric analyzer. To make comparison, theoretical TG and DTG values of blending pyrolysis are obtained by linearly calculating the TG and DTG values of homogenous pyrolysis of biomass and ash. It is found that the blending with ash-A (from city MSW) can improve the weight loss of both wood and paper by 4%~5% compared with the theoretical value, while the blending with ash-B (from rural area MSW) can improve the weight loss of paper but show no obvious effect on wood pyrolysis. In addition, the pyrolysis kinetic parameters were calculated, which show that ash-A can reduce the apparent activation energy (E value) of first and second pyrolysis stage of wood. Ash-B also can reduce the E value of the first pyrolysis stage of wood. For paper, ash-A and ash-B both obviously reduce E value of the second pyrolysis stage. All the results indicate that recycling and blending ash in the MSW pyrolysis can effectively affect the conversion rate and ratio of the biomass.
Key words:municipal solid wastes/
biomass/
ash/
blend/
pyrolysis/
kinetics.
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生活垃圾灰渣对生物质的热解特性及动力学的影响
马大朝1,霍钰1,
孙翔1,
韩彪2,
刘峥1
1.广西大学资源环境与材料学院，南宁 530004
2.广西壮族自治区环境保护科学研究院，南宁 530004
基金项目: 广西自然科学基金回国基金项目（2016GXNSFCA380027） 广西重点研发计划（桂科AB16380253） 广西大学青年博士科研启动基金项目（XBZT161052）
关键词: 生活垃圾/
生物质/
灰渣/
混合/
热解/
动力学
摘要:生活垃圾热解焚烧产生的热灰渣可以作为热解过程的热载体。为研究灰渣对生活垃圾中生物质热解的影响，在热重分析仪中将生活垃圾的典型组分木屑和纸屑分别与2种垃圾灰渣混合热解，并进行热解动力学研究。结果表明，城市生活垃圾的热解焚烧炉灰渣（A灰）可以提高木屑和纸屑的热解转化率，比理论值高出4%~5%。农村生活垃圾热解焚烧炉的灰渣（B灰）对纸屑热解具有促进作用，但对木屑的热解没有显著影响。动力学研究表明，混入A灰后，木屑热解的第1、第2阶段的表观活化能都大幅降低，与其提高木屑的热解转化率的结果相一致。B灰也使得木屑的热解第1阶段活化能降低。此外，A灰和B灰均可以显著降低纸屑第1段热解的活化能。
English Abstract
Effect of ash derived from municipal solid wastes on pyrolysis behaviors and kinetics of biomass
MA Dachao1,HUO Yu1,
SUN Xiang1,
HAN Biao2,
LIU Zheng1
1.School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
2.Scientific Research Academy of Guangxi Environmental Protection, Nanning 530004, China
Keywords: municipal solid wastes/
biomass/
ash/
blend/
pyrolysis/
kinetics
Abstract:The ash derived from the municipal solid waste (MSW) after pyrolysis and incineration can be used as heat carrier during the pyrolysis process. To investigate the influence of ash on biomass pyrolysis in MSW, wood or paper, typical biomass in the MSW, was blended with two types of MSW ash (ash-A and ash-B) to conduct pyrolysis and test the pyrolysis kinetics in the thermo gravimetric analyzer. To make comparison, theoretical TG and DTG values of blending pyrolysis are obtained by linearly calculating the TG and DTG values of homogenous pyrolysis of biomass and ash. It is found that the blending with ash-A (from city MSW) can improve the weight loss of both wood and paper by 4%~5% compared with the theoretical value, while the blending with ash-B (from rural area MSW) can improve the weight loss of paper but show no obvious effect on wood pyrolysis. In addition, the pyrolysis kinetic parameters were calculated, which show that ash-A can reduce the apparent activation energy (E value) of first and second pyrolysis stage of wood. Ash-B also can reduce the E value of the first pyrolysis stage of wood. For paper, ash-A and ash-B both obviously reduce E value of the second pyrolysis stage. All the results indicate that recycling and blending ash in the MSW pyrolysis can effectively affect the conversion rate and ratio of the biomass.
