Analysis of Syngas Components and Energy in Biomass Gasification Coupled Power Generation System

doi:10.12096/j.2096-4528.pgt.22164

Abstract

Abstract:

To achieve the carbon emission reduction target, the use of biomass to replace traditional energy is a key measure. The gasification process in the biomass gasification coupled power generation system was modeled and analyzed by Aspen Plus. The influence of equivalence ratio and ambient pressure on the composition of syngas gas was investigated, and the variation law of calorific value and energy of syngas was discussed based on the calculation results. The results show that the volume fraction of H₂ shows a monotonically decreasing trend with the increase of the equivalence ratio, from 19.47% to 5.19%. The CO volume fraction reaches a maximum value of about 22% near the equivalence ratio of 0.3. The volume fraction of CH₄ shows a monotonically decreasing state with the increase of equivalence ratio, from 1.3% to 0. Relying on the results of theoretical research, the gas calorific value curve shows the same change rule as CO and H₂, and reaches the highest value when the equivalence ratio is 0.3. In the range of 0.3-0.35, the overall change is not obvious and then declines. Considering the energy brought into the furnace and the sensible enthalpy of the gas, a synthesis gas energy evaluation method of calorific value + sensible enthalpy was proposed, which reaches the maximum value when the equivalence ratio is about 0.35.

Key words: coupled power generation, biomass gasification, equivalence ratio, calorific value, energy analysis

CLC Number:

TK 6

Yan ZHENG, Xuan YAO, Xunqiang CHEN. Analysis of Syngas Components and Energy in Biomass Gasification Coupled Power Generation System[J]. Power Generation Technology, 2023, 44(6): 859-864.

Figures/Tables 6

References 14

1	新华网．习近平在第七十五届联合国大会一般性辩论上发表重要讲话[EB/OL]．(2020-09-22)[2022-10-20]．．
	Xinhuanet ．Xijinping delivered an important speech at the general debate of the 75th session of the United Nations General Assembl[EB/OL]．(2020-09-22)[2022-10-20]．．
2	冯凯辉，闫湖，戴吴珍，等．计及能源利用效率的含生物质沼气发电农村能源系统优化运行[J]．中国电力，2022，55(7)：172-178．
	FENG K H， YAN H， DAI W Z，et al ．Optimal operation of rural energy system with biomass biogas power generation considering energy utilization efficiency[J]．Electric Power，2022，55(7)：172-178．
3	姜红丽，刘羽茜，冯一铭，等．碳达峰、碳中和背景下“十四五”时期发电技术趋势分析[J]．发电技术，2022，43(1)：54-64． doi:10.12096/j.2096-4528.pgt.21030
	JIANG H L， LIU Y X， FENG Y M，et al ．Analysis of power generation technology trend in 14th Five-Year plan under the background of carbon peak and carbon neutrality[J]．Power Generation Technology，2022，43(1)：54-64． doi:10.12096/j.2096-4528.pgt.21030
4	童光毅．基于双碳目标的智慧能源体系构建[J]．智慧电力，2021，49(5)：1-6． doi:10.3969/j.issn.1673-7598.2021.05.002
	TONG G Y ．Construction of smart energy system based on dual carbon goal[J]．Smart Power，2021，49(5)：1-6． doi:10.3969/j.issn.1673-7598.2021.05.002
5	孙永明，袁振宏，孙振钧．中国生物质能源与生物质利用现状与展望[J] ．可再生能源，2006(2)：78-82． doi:10.3969/j.issn.1671-5292.2006.02.026
	SUN Y M， YUAN Z H， SUN Z J ．The status and future of bioenergy and biomass utilizaiton in China[J]．Renewable Energy，2006(2)：78-82． doi:10.3969/j.issn.1671-5292.2006.02.026
6	许红星．我国能源利用现状与对策[J]．中外能源，2010，15(1)：3-14．
	XU H X ．Energy utilization in China and countermeasures[J]．Sino-global Energy，2010，15(1)：3-14．
7	薛凯，王义函，陈衡，等．槽式太阳能辅助生物质热电联产系统热力学性能分析[J]．发电技术，2021，42(6)：653-664． doi:10.12096/j.2096-4528.pgt.21044
	XUE K， WANG Y H， CHEN H，et al ．Thermodynamic performance analysis of a parabolic trough solar-assisted biomass-fired cogeneration system [J]．Power Generation Technology，2021，42(6)：653-664． doi:10.12096/j.2096-4528.pgt.21044
8	毛健雄．燃煤耦合生物质发电[J] ．分布式能源，2017，2(5)：47-54．
	MAO J X ．Co-firing biomass with coal for power generation[J]．Distributed Energy，2017，2(5)：47-54．
9	高金锴，佟瑶，王树才，等．生物质燃煤耦合发电技术应用现状及未来趋势[J]．可再生能源，2019，37(4)：501-506． doi:10.3969/j.issn.1671-5292.2019.04.005
	GAO J K， TONG Y， WANG S C，et al ．The current situation and future development tendency of biomass-coal coupling power generation system[J]．Renewable Energy，2019，37(4)：501-506． doi:10.3969/j.issn.1671-5292.2019.04.005
10	郭威，杨鹏，孙胜博，等．计及生物质能的热电联供系统经济运行优化策略[J]．电力系统保护与控制，2021，49(11)：88-96．
	GUO W， YANG P， SUN S B，et al ．Optimization strategy of a rural combined heat and power system considering biomass energy[J]．Power System Protection and Control，2021，49(11)：88-96．
11	云慧敏，代建军，李辉，等．生物质耦合燃煤发电经济环境效益评估[J]．化工学报，2021，72(12)：6311-6327． doi:10.11949/0438-1157.20211165
	YUN H M， DAI J J， LI H，et al ． Economic and environmental assessment of biomass coupled coal-fired power generation[J]．CIESC Journal，2021，72(12)：6311-6327． doi:10.11949/0438-1157.20211165
12	DAI J J， SOKHANSANJ S， MELIN S，et al ．Overview and some issues related to co-firing biomass and coal[J]．The Canadian Journal of Chemical Engineering，2008，86(3)：367-386． doi:10.1002/cjce.20052
13	SUN R W， LIU T T， CHEN X D，et al ．A biomass-coal co-firing based bi-level optimal approach for carbon emission reduction in China[J]．Journal of Cleaner Production，2021，278：123318． doi:10.1016/j.jclepro.2020.123318
14	王一坤，徐晓光，王栩，等．燃煤机组多源耦合发电技术及应用现状[J]．热力发电，2022，51(1)：60-68．
	WANG Y K， XU X G， WANG X，et al ．Multi-source coupling coal-fired power generating technology and its application status[J]．Thermal Power Generation，2022，51(1)：60-68．

检测项目		数值
全水分质量分数/%		7.90
工业分析	干燥基灰分质量分数/%	7.06
	干燥基挥发分质量分数/%	68.80
	干燥基固定碳质量分数/%	24.14
元素分析	干燥无灰基碳质量分数/%	54.72
	干燥无灰基氢质量分数/%	5.05
	干燥无灰基氧质量分数/%	32.95
	干燥无灰基氮质量分数/%	0.40
	干燥无灰基硫质量分数/%	0.25
发热量	收到基低位发热量/(MJ/kg)	14.02
灰成分分析	w(SiO₂)/%	57.50
	w(Al₂O₃)/%	0.67
	w(Fe₂O₃)/%	1.09
	w(CaO/%	10.61
	w(MgO)/%	4.17
	w(TiO₂)/%	0.13
	w(SO₃)/%	2.73
	w(P₂O₅)/%	ND
	w(K₂O)/%	16.53
	w(Na₂O)/%	2.49

检测项目		数值
全水分质量分数/%		7.90
工业分析	干燥基灰分质量分数/%	7.06
	干燥基挥发分质量分数/%	68.80
	干燥基固定碳质量分数/%	24.14
元素分析	干燥无灰基碳质量分数/%	54.72
	干燥无灰基氢质量分数/%	5.05
	干燥无灰基氧质量分数/%	32.95
	干燥无灰基氮质量分数/%	0.40
	干燥无灰基硫质量分数/%	0.25
发热量	收到基低位发热量/(MJ/kg)	14.02
灰成分分析	w(SiO₂)/%	57.50
	w(Al₂O₃)/%	0.67
	w(Fe₂O₃)/%	1.09
	w(CaO/%	10.61
	w(MgO)/%	4.17
	w(TiO₂)/%	0.13
	w(SO₃)/%	2.73
	w(P₂O₅)/%	ND
	w(K₂O)/%	16.53
	w(Na₂O)/%	2.49

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