Simulation of gasification characteristics from municipal solid waste under different moisture content

doi:10.16085/j.issn.1000-6613.2023-1485

Abstract

Abstract:

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.

Key words: gasification simulation, moisture content, heat balance, Aspen Plus, municipal solid waste

摘要：

我国不同地区的垃圾含水率有很大差异，为了探究垃圾含水率对气化特性的影响，更进一步地实现生活垃圾资源化利用，本文基于Aspen Plus建立了垃圾气化的工艺流程模型，分析了不同含水率下的温度对气化合成气组分、碳转化率（CCE）、低位热值（LHV）、气体产率的影响，气化温度提高促进CCE、LHV先降低后升高。结果表明升温和增加含水率可提高CCE、降低LHV，温度小于650℃时，增加含水率可促进气体产率，温度大于650℃时，增加含水率会降低气体产率；通过诸多气化指标得出垃圾含水率为25%、气化温度为850℃时为最优工况，在此基础上，40.63%的产气燃烧比例放热可以为干燥、热解、气化阶段提供热量，实现系统的热量自给。当气化温度和产气燃烧比例不变时，随着垃圾含水率的提高，气化系统对外界放出的热量先增加后减小。

关键词: 气化模拟, 含水率, 热平衡, Aspen Plus, 生活垃圾

CLC Number:

X705

CHEN Juhui, WANG Zhenming, LI Dan, WANG Bosen, ZHURAVKOV Michael, SIARHEI Lapatsin, YU Guangbin. Simulation of gasification characteristics from municipal solid waste under different moisture content[J]. Chemical Industry and Engineering Progress, 2024, 43(9): 4900-4908.

陈巨辉, 王振名, 李丹, 王柏森, ZHURAVKOV Michael, SIARHEI Lapatsin, 于广滨. 不同含水率下的生活垃圾气化特性模拟[J]. 化工进展, 2024, 43(9): 4900-4908.

Figures/Tables 11

References 23

1	GU Qinyang, WU Wei, JIN Baosheng, et al. Analyses for synthesis gas from municipal solid waste gasification under medium temperatures[J]. Processes, 2020, 8(1): 84.
2	蔡杰. 基于ASPEN Plus的村镇垃圾热解气化燃烧模拟与试验[D]. 杭州: 浙江大学, 2021: 14-21.
	CAI Jie. Simulation and experiment of pyrolysis, gasification and combustion of village waste based on ASPEN Plus[D]. Hangzhou: Zhejiang University, 2021: 14-21.
3	SINGH Dharminder, RAIZADA Aayush, YADAV Sanjeev. Syngas production from fast pyrolysis and steam gasification of mixed food waste[J]. Waste Management & Research, 2022, 40(11): 1669-1675.
4	DING Shenghong, LI Zhengwen, ZHOU Hongxia, et al. Municipal solid waste gasification for environmental management: A modeling study[J]. Energy Sources A: Recovery, Utilization, and Environmental Effects, 2019, 41(13): 1640-1648.
5	ALVES Octávio, CALADO Luís, PANIZIO Roberta M, et al. Techno-economic study for a gasification plant processing residues of sewage sludge and solid recovered fuels[J]. Waste Management, 2021, 131: 148-162.
6	LEE Roh Pin, SEIDL Ludwig Georg, HUANG Qiuliang, et al. An analysis of waste gasification and its contribution to China’s transition towards carbon neutrality and zero waste cities[J]. Journal of Fuel Chemistry and Technology, 2021, 49(8): 1057-1076.
7	郑志行, 李谦, 张家元, 等. 基于Aspen Plus的Shell气流床工业气化炉模拟[J]. 化工进展, 2021, 40(4): 2152-2160.
	ZHENG Zhihang, LI Qian, ZHANG Jiayuan, et al. Simulation of industrial shell entrained flow bed by Aspen Plus[J]. Chemical Industry and Engineering Progress, 2021, 40(4): 2152-2160.
8	KUO Po-Chih, ILLATHUKANDY Biju, WU Wei, et al. Plasma gasification performances of various raw and torrefied biomass materials using different gasifying agents[J]. Bioresource Technology, 2020, 314: 123740.
9	于杰, 董玉平, 常加富, 等. 玉米秸秆循环流化床气化中试试验[J]. 化工进展, 2018, 37(8): 2970-2975.
	YU Jie, DONG Yuping, CHANG Jiafu, et al. Pilot experiment of gasification of corn straw in circulating fluidized bed[J]. Chemical Industry and Engineering Progress, 2018, 37(8): 2970-2975.
10	DENG Na, LI Dongyan, ZHANG Qiang, et al. Simulation analysis of municipal solid waste pyrolysis and gasification based on Aspen Plus[J]. Frontiers in Energy, 2019, 13(1): 64-70.
11	郑志行, 张家元, 李谦, 等. 气流床煤气化的Aspen Plus建模: 平衡模型和动力学模型[J]. 化工进展, 2021, 40(8): 4165-4172.
	ZHENG Zhihang, ZHANG Jiayuan, LI Qian, et al. Aspen Plus modeling of the entrained bed coal gasification: Equilibrium model and kinetic model[J]. Chemical Industry and Engineering Progress, 2021, 40(8): 4165-4172.
12	刘洋, 黄亚继, 董新新, 等. 可燃生活垃圾气化Ca-Fe复合金属氧化物的原位固硫性能[J]. 化工进展, 2022, 41(10): 5677-5684.
	LIU Yang, HUANG Yaji, DONG Xinxin, et al. In-situ sulfur fixation performance of Ca-Fe composite metal oxides during gasification of combustible municipal solid waste[J]. Chemical Industry and Engineering Progress, 2022, 41(10): 5677-5684.
13	BEGUM Sharmina, RASUL M G, AKBAR Delwar. A numerical investigation of municipal solid waste gasification using Aspen Plus[J]. Procedia Engineering, 2014, 90: 710-717.
14	NEMMOUR Amira, INAYAT Abrar, JANAJREH Isam, et al. New performance correlations of municipal solid waste gasification for sustainable syngas fuel production[J]. Biomass Conversion and Biorefinery, 2022, 12(10): 4271-4289.
15	姜薇. 垃圾分类背景下北京市生活垃圾处理的影响分析[J]. 中国资源综合利用, 2021, 39(4): 138-141.
	JIANG Wei. Analysis on the impact of Beijing municipal domestic waste disposal under the background of waste classification[J]. China Resources Comprehensive Utilization, 2021, 39(4): 138-141.
16	CHHABRA Vibhuti, BHATTACHARYA Sankar, SHASTRI Yogendra. Pyrolysis of mixed municipal solid waste: Characterisation, interaction effect and kinetic modelling using the thermogravimetric approach[J]. Waste Management, 2019, 90: 152-167.
17	RUDRA Souman, TESFAGABER Yohannes Kifle. Future district heating plant integrated with municipal solid waste (MSW) gasification for hydrogen production[J]. Energy, 2019, 180: 881-892.
18	柏静儒, 李启凡, 吴海涛, 等. 基于Aspen Plus 抚顺式油页岩干馏过程模拟方法研究[J]. 化工进展, 2017, 36(1): 121-128.
	BAI Jingru, LI Qifan, WU Haitao, et al. Simulation of Fushun type retort for oil shale processing method using Aspen Plus[J]. Chemical Industry and Engineering Progress, 2017, 36(1): 121-128.
19	陈延贵, 张纹齐, 王银峰, 等. 基于Aspen Plus的煤-炼化污泥高温气化特性分析[J]. 化工进展, 2021, 40(10): 5786-5793.
	CHEN Yangui, ZHANG Wenqi, WANG Yinfeng, et al. Analysis of gasification characteristics of coal-petrochemical sludge at high temperature based on Aspen Plus[J]. Chemical Industry and Engineering Progress, 2021, 40(10): 5786-5793.
20	刘忠慧, 于旷世, 张海霞, 等. 基于Aspen Plus的循环流化床工业气化炉模拟[J]. 化工进展, 2018, 37(5): 1709-1717.
	LIU Zhonghui, YU Kuangshi, ZHANG Haixia, et al. Simulation of industrial circulating fluidized bed gasifier by Aspen Plus[J]. Chemical Industry and Engineering Progress, 2018, 37(5): 1709-1717.
21	刘泽伟, 胡建杭, 巴飞, 等. CO₂/N₂气氛下成型松木屑热解制备成型生物质炭的实验研究[J]. 中国电机工程学报, 2018, 38(11): 3281-3288.
	LIU Zewei, HU Jianhang, BA Fei, et al. Experimental investigation on pyrolysis of pine sawdust biomass briquettes to make biochar briquettes in CO₂/N₂ atmosphere[J]. Proceedings of the CSEE, 2018, 38(11): 3281-3288.
22	孙杰. 农林废弃物与无烟煤共气化模拟分析[D]. 福州: 福建农林大学, 2022.
	SUN Jie. Simulation analysis of co-gasification of forestry and agricultural residues and anthracite[D]. Fuzhou: Fujian Agriculture and Forestry University, 2022.
23	MEHDI Muzaffar, AMMAR TAQVI Syed ALI, SHAIKH Asif Ahmed, et al. Aspen plus simulation model of municipal solid waste gasification of metropolitan city for syngas production[J]. Fuel, 2023, 344: 128128.

工业分析/%					元素分析/%							Q_MSW
M_ar	FC_d	VM_d	ASH_d		C_d	H_d	N_d	CL_d	S_d	O_d		/kJ·kg^-1
47.28	9.28	54.20	36.52		35.05	4.11	2.14	0.55	0.23	21.40		12056

工业分析/%					元素分析/%							Q_MSW
M_ar	FC_d	VM_d	ASH_d		C_d	H_d	N_d	CL_d	S_d	O_d		/kJ·kg^-1
47.28	9.28	54.20	36.52		35.05	4.11	2.14	0.55	0.23	21.40		12056

固废种类	工业分析/%				元素分析/%
固废种类	M_ar	FC_d	VM_d	ASH_d	C_d	H_d	N_d	S_d	O_d
松木屑	8	17.16	82.29	0.05	50.54	7.08	0.15	0.57	41.11
煤粉	6.5	71.07	5.01	23.92	70.54	1.44	0.74	1.17	2.19

固废种类	工业分析/%				元素分析/%
固废种类	M_ar	FC_d	VM_d	ASH_d	C_d	H_d	N_d	S_d	O_d
松木屑	8	17.16	82.29	0.05	50.54	7.08	0.15	0.57	41.11
煤粉	6.5	71.07	5.01	23.92	70.54	1.44	0.74	1.17	2.19

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