燃煤电厂烟气MDEA/PZ混合胺法碳捕集工艺模拟分析

doi:10.16085/j.issn.1000-6613.2018-0740

化工进展 ›› 2019, Vol. 38 ›› Issue (04): 2046-2055.DOI: 10.16085/j.issn.1000-6613.2018-0740

燃煤电厂烟气MDEA/PZ混合胺法碳捕集工艺模拟分析

林海周^1,²(),罗海中¹,裴爱国¹,方梦祥²()

1. 中国能源建设集团广东省电力设计研究院有限公司，广东广州 510663
2. 浙江大学能源清洁利用国家重点实验室，浙江杭州 310027

收稿日期:2018-04-11 修回日期:2018-05-30 出版日期:2019-04-05 发布日期:2019-04-05
通讯作者: 方梦祥
作者简介:<named-content content-type="corresp-name">林海周</named-content>（1989—），男，博士后，研究方向为燃煤电厂烟气二氧化碳捕集。E-mail：<email>linhaizhou@gedi.com.cn</email>。|方梦祥，教授，博士生导师，研究方向为煤及生物质燃烧和气化技术、CO2控制技术。E-mail：<email>mxfang@zju.edu.cn</email>。
基金资助:
广东省自然科学基金博士启动项目(2018A030310692);基金项目:中国能源建设集团广东省电力设计研究院博士后科研项目(EV04531W)

Simulation and analysis of carbon dioxide capture process using MDEA/PZ blend solution in a coal-fired power plant

Haizhou LIN^1,²(),Haizhong LUO¹,Aiguo PEI¹,Mengxiang FANG²()

1. China Energy Engineering Group Guangdong Electric Power Design Institute Co., Ltd., Guangzhou 510663, Guangdong China
2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China

Received:2018-04-11 Revised:2018-05-30 Online:2019-04-05 Published:2019-04-05
Contact: Mengxiang FANG

摘要/Abstract

摘要：

采用混合胺吸收剂替代传统一乙醇胺（MEA）吸收剂是降低有机胺法碳捕集工艺能耗的重要方法。利用Aspen plus软件模拟了以甲基二乙醇胺(MDEA)/哌嗪(PZ)混合胺为吸收剂的燃煤电厂每年百万吨CO₂捕集工艺系统，考察了贫液负荷、MDEA/PZ混合胺浓度、MDEA/PZ比例和解吸压力等因素对解吸塔再沸器热负荷和冷凝器冷负荷的影响。通过对这些影响因素下吸收塔内液相温度分布和CO₂负荷分布变化揭示了MDEA/PZ对CO₂的吸收特性。此外，进一步分析了不同影响因素下解吸塔内气液相CO₂浓度驱动力和气液相级间温度驱动力分布特性，发现了强浓度驱动力和低温度驱动力分布更有利于降低再生能耗。研究表明，由30%MDEA和20%PZ组成的混合胺液在贫液负荷为0.08和解吸压力为2.02×10⁵Pa时，再沸器热负荷和塔顶冷凝负荷分别为2.76GJ/tCO₂和0.60GJ/tCO₂，相比传统MEA吸收剂降低了20.92%和40.0%。

关键词: 燃煤电厂, 二氧化碳捕集, 混合胺, 过程模拟, 能耗, 驱动力

Abstract:

Amine blend is recognized as a promising alternative to traditional MEA solution for reducing the energy cost of post-combustion chemical absorption CO₂ capture process. In this study, a coal-fired power plant CO₂ capture system using the blend of methyldiethanolamine (MDEA) and piperazine (PZ) as an absorbent was simulated by Aspen plus soft at a capacity of 1 million tons CO₂ one year. The effects of MDEA/PZ blend concentration, MDEA/PZ ratio, CO₂ load in lean solution and stripping pressure on the stripper reboiler heat duty and condenser cool duty were investigated. The liquid phase temperature and CO₂ load of the solution in the absorber under different conditions were analyzed to reveal the absorbing properties of MDEA/PZ blend. The CO₂ concentration driving force and temperature driving force for the stripping process were also studied. The results showed that strong concentration driving force and weak temperature driving force favored the decrease of energy cost. The heat duty and cold duty for CO₂ regeneration in stripper can be as low as 2.76GJ/tCO₂ and 0.60GJ/tCO₂, respectively under optimized conditions (30% MDEA and 20% PZ, 0.08 lean load, 2.02×10⁵Pa stripping pressure), which were reduced by 20.92% and 40.0% compared to using traditional MEA solution.

Key words: coal-fired power plant, carbon dioxide capture, amine blends, process simulation, energy cost, driving force

中图分类号:

林海周, 罗海中, 裴爱国, 方梦祥. 燃煤电厂烟气MDEA/PZ混合胺法碳捕集工艺模拟分析[J]. 化工进展, 2019, 38(04): 2046-2055.

Haizhou LIN, Haizhong LUO, Aiguo PEI, Mengxiang FANG. Simulation and analysis of carbon dioxide capture process using MDEA/PZ blend solution in a coal-fired power plant[J]. Chemical Industry and Engineering Progress, 2019, 38(04): 2046-2055.

图/表 17

图1 CO2捕集的工艺流程

表1 MDEA-PZ-CO2-H2O体系反应方程及参数

序号	方程	指前因子	活化能 /J·mol^?1
	平衡反应
(1)	2H₂OH₃O⁺+OH^?	—	—
(2)	HCO₃ ^? + H₂OCO₃ ^2?+H₃O⁺	—	—
(3)	PZH⁺ + H₂OPZ+H₃O⁺	—	—
(4)	H₂O + H⁺PZCOO^?H₃O⁺+PZCOO^?	—	—
(5)	MDEAH⁺ + H₂OMDEA+H₃O⁺	—	—
	动力学反应
(6)	CO₂ + OH^?HCO₃ ^?	1.33×10¹⁷	55458.99
(7)	HCO₃ ^?CO₂ + OH^?	6.63×10¹⁶	107393.5
(8)	PZ + CO₂ + H₂OPZCOO^?+H₃O⁺	1.70×10¹⁰	1335.302
(9)	PZCOO^? + H₃O⁺PZ+CO₂+H₂O	3.40×10²³	59272.34
(10)	PZCOO^? + CO₂ + H₂OPZ(COO)₂ ^2? + H₃O⁺	1.04×10¹⁴	33647.52
(11)	PZ(COO)₂ ^2? + H₃O⁺PZCOO^?+CO₂+H₂O	3.20×10²⁰	36383.84
(12)	MDEA + CO₂ + H₂OMDEAH⁺+HCO₃ ^?	6.85×10¹⁰	37794.49
(13)	MDEAH⁺ + HCO₃ ^?MDEA+CO₂+H₂O	6.62×10¹⁷	92638.15

图2 不同温度下MDEA-PZ-CO2-H2O体系中CO2分压与CO2负荷之间的关系[27]

表2 吸收塔和解吸塔初始参数

设备	直径/m	塔高/m	级数	填料	操作压力/atm
吸收塔	16	25	20	Mellapak 250Y	1.0
解吸塔	10	8	20	Mellapak 250Y	2.0

图3 不同吸收剂下贫液负荷对解吸塔再生冷热负荷的影响

图4 不同吸收剂下吸收塔液相温度和CO2负荷分布

图5 不同吸收剂下解吸过程驱动力分布

图6 不同浓度混合胺下贫液负荷对解吸塔冷热负荷的影响

图7 不同浓度吸收剂下吸收塔液相温度和各级吸收CO2比例分布

图8 不同吸收剂下解吸过程驱动力分布

图9 不同比例混合胺下贫液负荷对解吸冷热负荷的影响

图10 不同比例混合胺下最佳解吸冷热负荷和CO2负荷分布

图11 不同比例混合胺在最佳贫液负荷下吸收塔中液相温度分布

图12 不同比例混合胺在最佳贫液负荷下吸收塔中各级吸收的CO2比例分布

图13 不同吸收剂下解吸过程驱动力分布

图14 解吸压力对解吸塔冷热负荷和出入口温度的影响

图15 不同解吸压力下解吸过程驱动力分布

参考文献 35

1	中国电力企业联合会 . 中国煤电清洁发展报告[EB/OL]. [2017-09-22]. .
	The China Electricity Council . The development of Chinese coal cleaning report [EB/OL]. [2017-09-22]. .
2	英国石油公司 . BP世界能源统计年鉴[EB/OL]. [2017-06-12]. .
	BP . BP statistical review of world energy [EB/OL]. [2017-06-12]. .
3	国家发展与改革委员会 . 全国碳排放权交易市场建设方案（发电行业）[EB/OL]. [2017-12-18].
	The National Development and Reform Commission (NDRC) . The national carbon emissions trading market construction scheme (power generation industry) [EB/OL]. [2017-12-18]. .
4	RUBIN E S , MANTRIPRAGADA H , MARKS A , et al . The outlook for improved carbon capture technology [J]. Progress in Energy and Combustion Scienc, 2012, 38(5): 630-671.
5	ROCHELLE G T . Amine scrubbing for CO₂ capture [J]. Science, 2009, 325(5948): 1652-1654.
6	IDEM R , SUPAP T , SHI H , et al . Practical experience in post-combustion CO₂ capture using reactive solvents in large pilot and demonstration plants[J]. International Journal of Greenhouse Gas Control, 2015, 40: 6-25.
7	LIANG Zhiwu , FU Kaiyun , IDEM R , et al . Review on current advances, future challenges and consideration issues for post-combustion CO₂ capture using amine-based absorbents[J]. Chinese Journal of Chemical Engineering 2016, 24(2): 278-288.
8	LI Kangkang , LEIGH W , FERON P , et al . Systematic study of aqueous monoethanolamine (MEA)-based CO₂ capture process: techno-economic assessment of the MEA process and its improvements[J]. Applied Energy, 2016, 165: 648-659.
9	方梦祥, 周旭萍, 王涛, 等 . CO₂化学吸收剂[J]. 化学进展, 2015, 27(12): 1808-1814.
	FANG Mengxiang , ZHOU Xuping , WANG Tao , et al . Solvent development in CO₂ chemical absorption [J]. Progress in Chemistry, 2015, 27(12): 1808-1814.
10	陈健, 罗伟亮, 李晗 . 有机胺吸收二氧化碳的热力学和动力学研究进展[J]. 化工学报, 2014, 65(1): 12-21.
	CHEN Jian , LUO Weiliang , LI Han . A review for research on thermodynamics and kinetics of carbon dioxide absorption with organic amines[J]. CIESC Journal, 2014, 65(1): 12-21.
11	CLOSMANN F , NGUYEN T , ROCHELLE G T . MDEA/piperazine as a solvent for CO₂ capture[J]. Energy Procedia, 2009, 1(1): 1351-1357.
12	FRAILIE P T . Modeling of carbon dioxide absorption/stripping by aqueous methyldiethanolamine/piperazine[D]. Austin: The University of Texas at Austin, 2014.
13	SVENSSON H , HULTEBERG C , KARLSSON H T . Heat of absorption of CO₂ in aqueous solutions of N-methyldiethanolamine and piperazine[J]. International Journal of Greenhouse Gas Control, 2013, 17: 89-98.
14	KHAN A A , HALDER G N , SAHA A K . Experimental investigation on efficient carbon dioxide capture using piperazine (PZ) activated aqueous methyldiethanolamine (MDEA) solution in a packed column [J]. International Journal of Greenhouse Gas Control, 2017, 64(s): 163-173.
15	HUANG Jicai , GONG Maoqiong , DONG Xueqiang , et al . CO₂ solubility in aqueous solutions of N-methyldiethanolamine plus piperazine by electrolyte NRTL model[J]. Science China-Chemistry, 2016, 59(3): 360-369.
16	MOIOLI S , PELLEGRINI L A . Modeling the methyldiethanolamine-piperazine scrubbing system for CO₂ removal: thermodynamic analysis [J]. Frontiers of Chemical Science and Engineering, 2016, 10(1): 162-175.
17	SAMANTA A , BANDYOPADHYAY S S . Absorption of carbon dioxide into piperazine activated aqueous N-methyldiethanolamine[J]. Chemical Engineering Journal, 2011, 171(3): 734-741.
18	SAIDI M . Rate-based modeling of CO₂ absorption into piperazine-activated aqueous N-methyldiethanolamine solution: kinetic and mass transfer analysis[J]. International Journal of Chemical Kinetics, 2017, 49(9): 690-708.
19	TOBIESEN F A , SVENDSEN H F , MEJDELL T . Modeling of blast furnace CO₂ capture using amine absorbents[J]. Industrial & Engineering Chemistry Research, 2007, 46(23): 7811-7819.
20	MUDHASAKUL S , KU H M, DOUGLAS P L . A simulation model of a CO₂ absorption process with methyldiethanolamine solvent and piperazine as an activator[J]. International Journal of Greenhouse Gas Control, 2013, 15(s): 134-141.
21	ZHAO Bin , LIU Fangzheng , CUI Zheng , et al . Enhancing the energetic efficiency of MDEA/PZ-based CO₂ capture technology for a 650 MW power plant: process improvement[J]. Applied Energy, 2017, 185: 362-375.
22	DUBOIS L , THOMAS D . Comparison of various configurations of the absorption-regeneration process using different solvents for the post-combustion CO₂ capture applied to cement plant flue gases[J]. International Journal of Greenhouse Gas Control, 2018, 69: 20-35.
23	李晗, 陈健 . 单乙醇胺吸收CO₂的热力学模型和过程模拟[J]. 化工学报, 2014, 65(1): 47-54.
	LI Han , CHEN Jian . Thermodynamic modeling and process simulation for CO₂ absorption into aqueous monoethanolamine solution [J]. CIESC Journal, 2014, 65(1): 47-54.
24	张克舫, 刘中良, 王远亚, 等 . 化学吸收法CO₂捕集解吸能耗的分析计算[J]. 化工进展, 2013, 32(12): 3008-3014.
	ZHANG Kefang , LIU Zhongliang , WANG Yuanya , et al . Analysis and calculation of the desorption energy consumption of CO₂ capture process by chemical absorption method[J]. Chemical Industry and Engineering Progress, 2013, 32(12): 3008-3014.
25	张亚萍, 刘建周, 季芹芹, 等 . 醇胺法捕集燃煤烟气CO₂工艺模拟及优化[J]. 化工进展, 2013, 32(4): 930-935.
	ZHANG Yaping , LIU Jianzhou , JI Qinqin , et al . Process simulation and optimization of flue gas CO₂ capture by the alkanolamine solutions [J]. Chemical Industry and Engineering Progress, 2013, 32(4): 930-935.
26	WANG Tao , HE Hui , YU Wei , et al . Process simulations of CO₂ desorption in the interaction between the novel direct steam stripping process and solvents[J]. Energy & Fuels, 2017, 31(4): 4255-4262.
27	Aspen Technology Inc . ENRTL-RK rate-based model of the CO2 capture process by mixed PZ and MDEA using Aspen plus[EB/OL]. [2018-02-10]. .
28	DAMARTZIS T , PAPADOPOULOS A I , SEFERLIS P . Process flowsheet design optimization for various amine-based solvents in post-combustion CO₂ capture plants[J]. Journal of Cleaner Production, 2016, 111: 204-216.
29	BEK-PEDERSEN E , GANI R . Design and synthesis of distillation systems using a driving-force-based approach[J]. Chemical Engineering & Processing Process Intensification, 2004, 43(3): 251-262.
30	REZAZADEH F , GALE W F , LIN Y J , et al . Energy performance of advanced reboiled and flash stripper configurations for CO₂ capture using monoethanolamine[J]. Industrial & Engineering Chemistry Research, 2016, 55(16): 4622-4631.
31	LI Kangkang , COUSINS A , YU Hai , et al . Systematic study of aqueous monoethanolamine-based CO₂ capture process: model development and process improvement[J]. Energy Science & Engineering, 2016, 4(1): 23-39.
32	FAN Zhen , LIU Kun , QI Guojie , et al . Aspen modeling for MEA-CO₂ loop: dynamic gridding for accurate column profile [J]. International Journal of Greenhouse Gas Control, 2015, 37: 318-324.
33	YING Jiru , RAETS S , EIMER D . The activator mechanism of piperazine in aqueous methyldiethanolamine solutions[J]. Energy Procedia, 2017, 114: 2078-2087.
34	ZHANG W , CHEN J , LUO X , et al . Modelling and process analysis of post-combustion carbon capture with the blend of 2-amino-2-methyl-1-propanol and piperazine[J]. International Journal of Greenhouse Gas Control, 2017, 63: 37-46.
35	KHALILPOUR R . Flexible operation scheduling of a power plant integrated with PCC processes under market dynamics[J]. Industrial & Engineering Chemistry Research, 2014, 53(19): 8132-8146.

编辑推荐 0

Metrics

阅读次数

全文

1495

HTML			PDF

最新录用	在线预览	正式出版	最新录用	在线预览	正式出版
0	0	9	0	0	1486

来源	本网站	其他网站

次数	425	1070
比例	28%	72%

摘要

613

最新录用	在线预览	正式出版

0	0	613

来源	本网站	其他网站

次数	321	292
比例	52%	48%

[1]	戴欢涛, 曹苓玉, 游新秀, 徐浩亮, 汪涛, 项玮, 张学杨. 木质素浸渍柚子皮生物炭吸附CO₂特性[J]. 化工进展, 2023, 42(S1): 356-363.
[2]	王胜岩, 邓帅, 赵睿恺. 变电吸附二氧化碳捕集技术研究进展[J]. 化工进展, 2023, 42(S1): 233-245.
[3]	白亚迪, 邓帅, 赵睿恺, 赵力, 杨英霞. 变温吸附碳捕集机组标准化测试方案探讨及性能实验[J]. 化工进展, 2023, 42(7): 3834-3846.
[4]	顾诗亚, 董亚超, 刘琳琳, 张磊, 庄钰, 都健. 考虑中间节点的碳捕集管路系统设计与优化[J]. 化工进展, 2023, 42(6): 2799-2808.
[5]	符乐, 杨阳, 徐文青, 耿錾卜, 朱廷钰, 郝润龙. 新型相变有机胺吸收捕集CO₂技术研究进展[J]. 化工进展, 2023, 42(4): 2068-2080.
[6]	夏少波, 段璐, 王建朋, 纪任山. 飞灰含湿量对耦合电袋除尘器性能影响规律[J]. 化工进展, 2023, 42(4): 2101-2108.
[7]	尚玉, 肖满, 崔秋芳, 涂特, 晏水平. CO₂捕集工艺中热再生气余热的PVDF/BN-OH平板复合膜回收特性[J]. 化工进展, 2023, 42(3): 1618-1628.
[8]	沈天绪, 沈来宏. 基于3kW塔式串行流化床差异燃料的化学链燃烧解析[J]. 化工进展, 2023, 42(1): 138-147.
[9]	王璐, 张磊, 都健. 机器学习高效筛选用于CO₂/N₂选择性吸附分离的沸石材料[J]. 化工进展, 2023, 42(1): 148-158.
[10]	王一茹, 宋小三, 水博阳, 王三反. 胺功能化介孔二氧化硅捕集CO₂的研究进展[J]. 化工进展, 2022, 41(S1): 536-544.
[11]	周红军, 周颖, 徐春明. 中国碳达峰碳中和目标下炼化一体化新路径与实践[J]. 化工进展, 2022, 41(4): 2226-2230.
[12]	张卫风, 周武, 王秋华. 相变吸收捕集烟气中CO₂技术的发展现状[J]. 化工进展, 2022, 41(4): 2090-2101.
[13]	郑鹏, 李蔚玲, 郭亚飞, 孙健, 王瑞林, 赵传文. 鼓泡床中电石渣加速碳酸化分析与响应面优化[J]. 化工进展, 2022, 41(3): 1528-1538.
[14]	孔祥宇, 谢亮, 王延民, 翟尚鹏, 王建国. CO₂的捕集及资源化利用[J]. 化工进展, 2022, 41(3): 1187-1198.
[15]	唐思扬, 李星宇, 鲁厚芳, 钟山, 梁斌. 低能耗化学吸收碳捕集技术展望[J]. 化工进展, 2022, 41(3): 1102-1106.

燃煤电厂烟气MDEA/PZ混合胺法碳捕集工艺模拟分析

Simulation and analysis of carbon dioxide capture process using MDEA/PZ blend solution in a coal-fired power plant

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 17

参考文献 35

相关文章 15

编辑推荐 0

Metrics

本文评价