Design of Calcium-based Carbon Capture System for Gas-Steam Combined Cycle Assisted by Solar Thermal Tower

doi:10.12096/j.2096-4528.pgt.21081

Abstract

Abstract:

Fossil energy power stations are the largest centralized source of CO₂ emission, and the carbon emission reduction of fossil energy power stations such as coal and gas is the essential way to achieve carbon neutralization. Compared with other technologies, carbon capture based on the alkali metal has the advantages of high capture efficiency and low reaction energy consumption, but its high regeneration energy consumption will greatly affect the performance of coal-fired power stations. In this paper, a system of gas-steam combined cycle with flue gas carbon capture assisted by solar thermal tower was proposed. Taking a 467MW gas steam combined cycle power plant as the prototype, the system design and performance analysis were carried out. Compared with the original system, the power generation of the designed system was increased by 42.43MW, and the power generation efficiency reached 63%. Compared with the reference system relying on fossil energy to capture carbon dioxide, the designed power generation capacity of the system was increased by 148.5MW, and the power generation efficiency was increased by about 18 percent points. The vernal equinox day was selected as a typical day to analyze the off-design condition of the system. The results show that the system can operate at rated condition for more than six hours a day, the cumulative carbon capture capacity is 1452t, and the cumulative additional power generation is 381MW·h. The proposed system used solar energy to capture carbon dioxide without reducing the power generation efficiency of the power station itself, and realized the zero-carbon emission utilization of fossil energy. In addition, the high-temperature heat released by the calcium-based carbon capture and carbonation process was reused to the gas-steam combined cycle system for power generation to further improve the system performance. The research results can provide new ideas and methods for the multi-energy complementary and comprehensive utilization of renewable energy and fossil energy.

Key words: carbon neutralization, solar thermal power generation, calcium-based carbon capture, multi-energy complementation, carbon emission reduction

CLC Number:

TK51

Lanhua LIU, Ruilin WANG, Hui HONG. Design of Calcium-based Carbon Capture System for Gas-Steam Combined Cycle Assisted by Solar Thermal Tower[J]. Power Generation Technology, 2021, 42(4): 517-524.

Figures/Tables 8

Fig.1 Schematic diagram of gas-steam combined cycle flue gas carbon capture system driven by solar thermal tower

Fig.2 Calcium-based carbon capture regeneration/capture reaction process model

Tab. 1 Main parameters of gas-steam combined cycle wheel

参数	数值	参数	数值
空气质量流量/(kg·s⁻¹)	641.97	压气机效率	0.89
压气机出口压力/MPa	15.37	透平入口烟气温度/K	1 600.15
烟气质量流量/(kg·s⁻¹)	658.46	透平设计效率	0.83
高压缸入口温度/K	567.50	中低压缸入口压力/MPa	2.30
高压缸入口压力/MPa	9.79	中低压缸入口温度/K	567.50
高压相对内效率	0.87	中低压相对内效率	0.91
燃空比	38.92	总发电功率/MW	467.25

Fig.3 Relationship between carbon capture efficiency and temperature in carbonation process of calcium-based carbon capture

Tab. 2 Solar spotlight heating parameters

参数	数值	参数	数值
定日镜反射率/%	93	定日镜场效率/%	78
接收机发射率/%	15	吸热器拦截效率/%	98
定日镜清洁系数	0.94

Fig.4 Comparison of raw, reference, and design system performance

Fig.5 Trends of solar irradiance, carbon capture capacity and power generation increase at different moments

Fig.6 Variation of solar thermal energy storage and release of in typical days

References 21

1	姜曼, 杨司玥, 刘定宜, 等. 中国各省可再生能源电力消纳量对碳排放的影响[J]. 电网与清洁能源, 2020, 36 (7): 87- 95.
	JIANG M , YANG S Y , LIU D Y , et al. Impacts of renewable electricity consumption on carbon dioxide emission in China's provinces[J]. Power System and Clean Energy, 2020, 36 (7): 87- 95.
2	潘旭东, 黄豫, 唐金锐, 等. 新能源发电发展的影响因素分析及前景展望[J]. 智慧电力, 2019, 47 (11): 41- 47. DOI
	PAN X D , HUANG Y , TANG J R , et al. Influencing factors and prospects for development of renewable energy power generation[J]. Smart Power, 2019, 47 (11): 41- 47. DOI
3	World Meteorological Organization. Statement on the state of the global climate in 2018[R]. Geneva: World Meteorological Organization, 2018.
4	KANNICHE M , GROS-BONNIVARD R , JAUD P , et al. Pre-combustion, post-combustion and oxy-combustion in thermal power plant for CO₂ capture[J]. Applied Thermal Engineering, 2010, 30 (1): 53- 62. DOI
5	邢晨健, 钱煜, 周燃, 等. 太阳能聚光光伏-余热碳捕集利用方式分析[J]. 华电技术, 2020, 42 (4): 84- 88. DOI
	XING C J , QIAN Y , ZHOU R , et al. Analysis of utilization modes combining concentrating photovoltaic power generation and photovoltaic residual heat driving carbon capture[J]. Huadian Technology, 2020, 42 (4): 84- 88. DOI
6	赵传文, 陈晓平, 赵长遂. 碱金属基吸收剂干法脱除CO₂技术的研究进展[J]. 动力工程, 2008, 28 (6): 827- 833. DOI
	ZHAO C W , CHEN X P , ZHAO C S . Advances in the study of the dry removal of CO₂ by alkali metal-based absorbents[J]. Power Engineering, 2008, 28 (6): 827- 833. DOI
7	郜时旺. 中国华能燃烧后CO捕集工程示范[R]. 北京: 华能清洁能源研究院, 2016.
	GAO S W. China Huaneng combustion co-capture project demonstration[R]. Beijing: Huaneng Institute for Clean Energy Research, 2016.
8	VEGA F , BAENA-MORENO F , FERNÁNDEZ L M G , et al. Current status of CO₂ chemical absorption research applied to CCS: towards full deployment at industrial scale[J]. Applied Energy, 2020, 260, 114313.
9	ZHAI R , QI J , ZHU Y , et al. Novel system integrations of 1000MW coal-fired power plant retrofitted with solar energy and CO₂ capture system[J]. Applied Thermal Engineering, 2017, 125, 1133- 1145. DOI
10	GREEN D A, TURK B S, GUPTA R P, et al. Carbon dioxide capture from flue gas using dry regenerable sorbents[R]. Chicago, USA: Research Triangle Institute, 2004.
11	朱维群, 王倩. 碳中和目标下的化石能源利用新技术路线开发[J]. 发电技术, 2021, 42 (1): 3- 7.
	ZHU W Q , WANG Q . Development of new technological routes for fossil energy utilization under the goal of carbon neutral[J]. Power Generation Technology, 2021, 42 (1): 3- 7.
12	ZHAO Y W , HONG H , ZHANG X S , et al. Integrating mid-temperature solar heat and post-combustion CO₂-capture in a coal-fired power plant[J]. Solar Energy, 2012, 86 (11): 3196- 3204.
13	KHALILPOUR R , MILANI D , QADIR A , et al. A novel process for direct solvent regeneration via solar thermal energy for carbon capture[J]. Renewable Energy, 2017, 104, 60- 75.
14	ZHAI R , QI J , ZHU Y , et al. Novel system integrations of 1000MW coal-fired power plant retrofitted with solar energy and CO₂ capture system[J]. Applied Thermal Engineering, 2017, 125, 1133- 1145.
15	ZHANG X , LIU Y . Performance assessment of CO₂ capture with calcination carbonation reaction process driven by coal and concentrated solar power[J]. Applied Thermal Engineering, 2014, 70 (1): 13- 24.
16	陈强. 分布式冷热电联供系统全工况特性与主动调控机理及方法[D]. 北京: 中国科学院研究生院(工程热物理研究所), 2014.
	CHEN Q. The whole operating condition characteristics and active regulation mechanism and method of distributed hot and cold power supply system[D]. Beijing: Graduate School of Chinese Academy of Sciences (Institute of Engineering Thermophysics), 2014.
17	WANG R L , SUN J , HONG H . Proposal of solar-aided coal-fired power generation system with direct steam generation and active composite sun-tracking[J]. Renewable Energy, 2019, 141, 596- 612.
18	白子为. 燃气机组热力系统全工况优化及策略研究[D]. 北京: 华北电力大学, 2019.
	BAI Z W. Study on the optimization and strategy of the thermal system of gas units[D]. Beijing: North China Electric Power University, 2019.
19	LIU W , FENG B , WU Y , et al. Synthesis of sintering-resistant sorbents for CO₂ capture[J]. Environmental Science Technology, 2010, 44 (8): 3093- 3097.
20	邢晨健, 王瑞林, 赵传文. 燃煤电站与光伏余热辅助胺法脱碳系统集成[J]. 洁净煤技术, 2021, 27 (2): 170- 179.
	XING C J , WANG R L , ZHAO C W . Coal-fired power station and photovoltaic residual heat auxiliary amine method decarbonization system integration[J]. Clean Coal Technology, 2021, 27 (2): 170- 179.
21	WANG R L , Sun J , Hong H , et al. Comprehensive evaluation for different modes of solar-aided coal-fired power generation system under common framework regarding both coal-savability and efficiency-promotability[J]. Energy, 2018, 143, 151- 167.

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