基于超临界水煤气化工艺的发电系统设计
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摘要
为建立更高效的热力发电系统,实现煤的清洁利用,本文基于超临界水煤气化工艺,考虑汽轮机运行安全性和能源的高效利用,设计了新型发电系统,针对水煤浆质量浓度ω(Coal)为0.3～0.35工况计算了相应气化产物组分含量。利用化工流程软件建模,得出不同水煤浆浓度下系统各节点热力参数,并进行性能分析.结果显示,系统效率随水煤浆浓度提高而增大.针对水煤浆浓度ω(Coal)=0.35开展了凝气式和背压式汽轮机的性能计算与分析,为汽轮机的实际应用设计提供参考。
In order to build a more efficient thermal power generation system and realize the clean utilization of coal, a novel power generation system is designed based on coal and supercritical water gasification process, considering the safety of steam turbine operation and the efficient utilization of energy. The component content of gasification products is calculated under the conditions of 0.3～0.35 coal water slurry(CWS) mass concentration. The thermodynamic parameters of the nodes of the system under different CWS concentrations are obtained and the performance analysis is carried out by modeling the system in chemical process software. The results show that with the growth of CWS concentration, the efficiency of the system increases. The performance calculation and analysis of condensing turbines and back-pressure turbines are carried out for 0.35 CWS mass concentration,which provide reference for practical application and design of steam turbines.
In order to build a more efficient thermal power generation system and realize the clean utilization of coal, a novel power generation system is designed based on coal and supercritical water gasification process, considering the safety of steam turbine operation and the efficient utilization of energy. The component content of gasification products is calculated under the conditions of 0.3～0.35 coal water slurry(CWS) mass concentration. The thermodynamic parameters of the nodes of the system under different CWS concentrations are obtained and the performance analysis is carried out by modeling the system in chemical process software. The results show that with the growth of CWS concentration, the efficiency of the system increases. The performance calculation and analysis of condensing turbines and back-pressure turbines are carried out for 0.35 CWS mass concentration,which provide reference for practical application and design of steam turbines.
引文
[1] GUO Liejin, JIN Hui. Boiling coal in water:HydrogenProduction and Power Generation System with Zero Net CO2 Emission Based on Coal and Supercritical Water Gasification[J]. International Journal of Hydrogen Energy, 2013, 38(29):12953-12967
[2]闫秋会,苗海军,张莉,等.超临界水中煤气化制氢热力发电系统的构建及其能量转化机理分析[J].煤炭技术,2014,33(8):221-223YAN Qiuhui, MIAO Haijun, ZHANG Li, et al. Novel Power Generation System Based on Coal Gasification in Supercritical Water and Principle of Its Energy Conversion[J]. Coal Technology, 2014, 33(8):221-223
[3] CHEN Zhewen, ZHANG Xiaosong, GAO Lin, et al. Thermal Analysis of Supercritical Water Gasification of Coal for Power Generation with Partial Heat Recovery[J]. Applied Thermal Engineering, 2017, 111:1287-1295
[4]王巍,毛晨旭,杨金广,等.超临界水煤气化工艺动力循环的设计与性能分析[C]//中国工程热物理学会学术会议论文集,宁波:中国工程热物理学会,2017, No.171122WANG Wei, MAO Chenxu, YANG Jinguang, et al. Design and Performance Analysis of Power System Based on Coal Gasification in Supercritical Water[C]//Collected Papers of Proceeding of Chinese Society of Engineering Thermophysics, 2017, No.171122
[5] JIN Hui, LU Youjun, LIAO Bo, et al. Hydrogen Production by Coal Gasification in Supercritical Water With a Fluidized Bed Reactor[J]. International Journal of Hy-drogen Energy. 2010, 35(13):7151-7160
[6] LI Yongliang, GUO Liejin, ZHANG Ximin, et al. Hydrogen Production From Coal Gasification in Supercritical Water With a Continuous Flowing System[J]. International Journal of Hydrogen Energy. 2010, 35(7):3036-3045
[7]郭烈锦,赵亮,吕友军,等.煤炭超临界水气化制氢发电多联产技术[J].工程热物理学报,2017, 38(3):678-679GUO Liejin, ZHAO Liang, LU Youjun, et al. Hydrogen Production and Power Generation Poly-generation Technology by Coal Gasification in Supercritical Water[J].Journal of Engineering Thermophysics, 2017, 38(3):678-679
[8] WANG Jie and, Takarada T. Role of Calcium Hydroxide in Supercritical Water Gasification of Low-Rank Coal[J].Energy&Fuels, 2001, 15(2):356-362
[9]隋然,白松,龚剑.氢气储存方法的现状及发展[J].舰船防化,2009(3):52-56SUI Ran, BAI Song, GONG Jian. Status and Progress in Hydrogen Storage Technology[J]. Chenmical Defence on Ships, 2009(3):52-56
[10] GE Zhiwei, GUO Simao, GUO Liejin, et al. Hydrogen Production by Non-catalytic Partial Oxidation of Coal in Supercritical Water:Explore the Way to Complete Gasification of Lignite and Bituminous Coal[J]. International Journal of Hydrogen Energy, 2013, 38(29):12786-12794
[2]闫秋会,苗海军,张莉,等.超临界水中煤气化制氢热力发电系统的构建及其能量转化机理分析[J].煤炭技术,2014,33(8):221-223YAN Qiuhui, MIAO Haijun, ZHANG Li, et al. Novel Power Generation System Based on Coal Gasification in Supercritical Water and Principle of Its Energy Conversion[J]. Coal Technology, 2014, 33(8):221-223
[3] CHEN Zhewen, ZHANG Xiaosong, GAO Lin, et al. Thermal Analysis of Supercritical Water Gasification of Coal for Power Generation with Partial Heat Recovery[J]. Applied Thermal Engineering, 2017, 111:1287-1295
[4]王巍,毛晨旭,杨金广,等.超临界水煤气化工艺动力循环的设计与性能分析[C]//中国工程热物理学会学术会议论文集,宁波:中国工程热物理学会,2017, No.171122WANG Wei, MAO Chenxu, YANG Jinguang, et al. Design and Performance Analysis of Power System Based on Coal Gasification in Supercritical Water[C]//Collected Papers of Proceeding of Chinese Society of Engineering Thermophysics, 2017, No.171122
[5] JIN Hui, LU Youjun, LIAO Bo, et al. Hydrogen Production by Coal Gasification in Supercritical Water With a Fluidized Bed Reactor[J]. International Journal of Hy-drogen Energy. 2010, 35(13):7151-7160
[6] LI Yongliang, GUO Liejin, ZHANG Ximin, et al. Hydrogen Production From Coal Gasification in Supercritical Water With a Continuous Flowing System[J]. International Journal of Hydrogen Energy. 2010, 35(7):3036-3045
[7]郭烈锦,赵亮,吕友军,等.煤炭超临界水气化制氢发电多联产技术[J].工程热物理学报,2017, 38(3):678-679GUO Liejin, ZHAO Liang, LU Youjun, et al. Hydrogen Production and Power Generation Poly-generation Technology by Coal Gasification in Supercritical Water[J].Journal of Engineering Thermophysics, 2017, 38(3):678-679
[8] WANG Jie and, Takarada T. Role of Calcium Hydroxide in Supercritical Water Gasification of Low-Rank Coal[J].Energy&Fuels, 2001, 15(2):356-362
[9]隋然,白松,龚剑.氢气储存方法的现状及发展[J].舰船防化,2009(3):52-56SUI Ran, BAI Song, GONG Jian. Status and Progress in Hydrogen Storage Technology[J]. Chenmical Defence on Ships, 2009(3):52-56
[10] GE Zhiwei, GUO Simao, GUO Liejin, et al. Hydrogen Production by Non-catalytic Partial Oxidation of Coal in Supercritical Water:Explore the Way to Complete Gasification of Lignite and Bituminous Coal[J]. International Journal of Hydrogen Energy, 2013, 38(29):12786-12794