褐煤抽气预干燥超临界二氧化碳循环发电系统性能分析

张旭伟; 白文刚; 高炜; 李红智; 姚明宇

doi:10.7652/xjtuxb202301008

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褐煤抽气预干燥超临界二氧化碳循环发电系统性能分析

专题新型动力循环 | 更新时间：2025-07-09

- 褐煤抽气预干燥超临界二氧化碳循环发电系统性能分析
- Performance Analysis of Supercritical CO₂ Lignite-Fired Power Plant Integrated with Gas Extraction Pre-Drying System
- 西安交通大学学报 2023年57卷第1期页码：78-86
- 作者机构：
  
  西安热工研究院有限公司,西安,710054
- 作者简介：
  
  : 2022-08-04。作者简介: 张旭伟(1993—),男,工程师
  李红智(通信作者),男,研究员。基金项目: 国家重点研发计划资助项目(2020YFF0218104)。
- 基金信息：
  
  : 2022-08-04。作者简介: 张旭伟(1993—),男,工程师;李红智(通信作者),男,研究员。基金项目: 国家重点研发计划资助项目(2020YFF0218104)。
- DOI：10.7652/xjtuxb202301008
  中图分类号： TK114
- 网络首发：2023-01-10，
  
  纸质出版：2023
- 稿件说明：
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张旭伟, 白文刚, 高炜, 等. 褐煤抽气预干燥超临界二氧化碳循环发电系统性能分析[J]. 西安交通大学学报, 2023,57(1):78-86.

ZHANG Xuwei, BAI Wengang, GAO Wei, et al. Performance Analysis of Supercritical CO₂ Lignite-Fired Power Plant Integrated with Gas Extraction Pre-Drying System[J]. 2023, 57(1): 78-86. DOI: 10.7652/xjtuxb202301008.
张旭伟, 白文刚, 高炜, 等. 褐煤抽气预干燥超临界二氧化碳循环发电系统性能分析[J]. 西安交通大学学报, 2023,57(1):78-86. DOI： 10.7652/xjtuxb202301008.

ZHANG Xuwei, BAI Wengang, GAO Wei, et al. Performance Analysis of Supercritical CO₂ Lignite-Fired Power Plant Integrated with Gas Extraction Pre-Drying System[J]. 2023, 57(1): 78-86. DOI: 10.7652/xjtuxb202301008. DOI：

摘要

为了提高褐煤发电系统能效

提出了一种基于抽气预干燥的褐煤超临界二氧化碳循环发电系统。首先以高温回热器热侧出口工质携带的高温热量为热源预热褐煤

使褐煤中的水分蒸发。其次预干燥褐煤抽气工质在干燥机中放热后

可以进入低温回热器加热冷侧低温工质

减少能量损失。基于热力学第一、第二定律

建立了新型超临界二氧化碳动力循环褐煤发电系统与褐煤预干燥系统高效耦合热力计算模型

并对直燃褐煤发电系统和褐煤抽气预干燥发电系统进行对比分析。以内蒙古锡林浩特胜利煤田原煤为例进行计算

结果表明:相比于直燃褐煤发电系统

褐煤抽气预干燥发电系统通过利用高温抽气干燥褐煤

可以使发电效率提高1.50%

发电标准煤耗率降低8.41 g·(kW·h)

-1

; 进一步分析结果显示

系统能效的提高主要得益于锅炉燃烧损的降低

预干燥褐煤使得锅炉燃烧损降低4.47%

故系统效率提高1.34%; 干燥机效率和褐煤干燥程度越高

褐煤抽气预干燥发电系统节能潜力越大。

Abstract

To improve the energy efficiency of the lignite-fired power plant

a supercritical CO

lignite-fired power plant integrated with gas extraction pre-drying system is proposed. Firstly

the high temperature heat carried by the working medium at the hot side outlet of the high temperature regenerator is used as the heat source to preheat the lignite to evaporate the water in the lignite. Secondly

the working fluid after releasing heat in the dryer enters the low temperature regenerator to heat the low temperature working fluid on the

cold side to reduce energy loss. Based on the first and second laws of thermodynamics

the thermodynamic calculation model of a novel high-efficiency coupled system of supercritical CO

lignite-fired power plant and gas extraction pre-drying system are established

and a comparative analysis is made between the direct-fired lignite power plant and the lignite-fired power plant integrated with gas extraction pre-drying system. Taking the lignite from the Shengli coalfield in Xilinhot

Inner Mongolia as an example

the calculation is carried out. Results show that the gas extraction pre-drying lignite can increase the power generation efficiency by 1.50% and reduce the standard coal consumption rate by 8.41 g·(kW·h)

-1

. Exergy analysis further shows that the gas extraction pre-drying lignite reduces the combustion exergy destruction of the boiler by 4.47%

which increases the exergy efficiency of the lignite-fired power plant by 1.34%. And the improvement of system exergy efficiency is mainly contributed to the reduction of the exergy destruction during the boiler combustion. The higher the dryer efficiency and the lignite drying degree

the greater the energy-saving potential of the lignite-fired power plant integrated with gas extraction pre-drying system.

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references

国家能源局. 国家能源局发布2021年全国电力工业统计数据 [EB/OL].(2022-01-26)[2022-07-06]. http://www.nea.gov.cn/2022-01/26/c_1310441589.htm.

吴毅, 王佳莹, 王明坤, 等. 基于超临界CO2布雷顿循环的塔式太阳能集热发电系统 [J]. 西安交通大学学报, 2016, 50(5): 108-113.

WU Yi, WANG Jiaying, WANG Mingkun, et al. A towered solar thermal power plant based on supercritical CO2 Brayton cycle [J]. Journal of Xi'an Jiaotong University, 2016, 50(5): 108-113.

ZHANG Yifan, LI Hongzhi, HAN Wanlong, et al. Improved design of supercritical CO2 Brayton cycle for coal-fired power plant [J]. Energy, 2018, 155: 1-14.

张旭伟, 白文刚, 吴家荣, 等. 采用超临界二氧化碳动力循环回收燃气轮机排气余热的系统优化研究 [J]. 热力发电, 2021, 50(5): 43-50.

ZHANG Xuwei, BAI Wengang, WU Jiarong, et al. Optimization of system using supercritical carbon dioxide power cycle to recover waste heat from gas turbine exhaust [J]. Thermal Power Generation, 2021, 50(5): 43-50.

LIU Ming, ZHANG Xuwei, YANG Kaixuan, et al. Optimization and comparison on supercritical CO2 power cycles integrated within coal-fired power plants considering the hot and cold end characteristics [J]. Energy Conversion and Management, 2019, 195: 854-865.

MECHERI M, LE MOULLEC Y. Supercritical CO2 Brayton cycles for coal-fired power plants [J]. Energy, 2016, 103: 758-771.

BAI Wengang, ZHANG Yifan, YANG Yu, et al. 300 MW boiler design study for coal-fired supercritical CO2 Brayton cycle [J]. Applied Thermal Engineering, 2018, 135: 66-73.

PARK S H, KIM J Y, YOON M K, et al. Thermodynamic and economic investigation of coal-fired power plant combined with various supercritical CO2 Brayton power cycle [J]. Applied Thermal Engineering, 2018, 130: 611-623.

LIU Ming, ZHANG Xuwei, YANG Kaixuan, et al. Comparison and sensitivity analysis of the efficiency enhancements of coal-fired power plants integrated with supercritical CO2 Brayton cycle and steam Rankine cycle [J]. Energy Conversion and Management, 2019, 198: 111918.

冯雪佳, 王顺森. 在煤富氧燃烧下的超临界CO2再压缩循环的热力学分析 [J]. 西安交通大学学报, 2018, 52(11): 100-105.

FENG Xuejia, WANG Shunsen. Thermodynamic analysis of the supercritical CO2 recompression cycle in oxygen-enriched combustion of coal [J]. Journal of Xi'an Jiaotong University, 2018, 52(11): 100-105.

吴佐莲, 张一帆, 张纯, 等. 煤基超临界二氧化碳热电联产机组调峰能力研究 [J]. 热力发电, 2018, 47(6): 29-34.

WU Zuolian, ZHANG Yifan, ZHANG Chun, et al. Study on peak regulation capacity of a coal-fired supercritical carbon dioxide cogeneration unit [J]. Thermal Power Generation, 2018, 47(6): 29-34.

白文刚, 李红智, 张磊, 等. 一种改进的超临界二氧化碳燃煤发电系统及其分析 [J]. 热力发电, 2020, 49(10): 114-119.

BAI Wengang, LI Hongzhi, ZHANG Lei, et al. Exergy analysis for an improved recompression supercritical carbon dioxide cycle for coal-fired power plant [J]. Thermal Power Generation, 2020, 49(10): 114-119.

张旭伟, 李红智, 乔永强, 等. 集成余热回收的超临界二氧化碳燃煤发电系统研究 [J]. 热力发电, 2020, 49(12): 17-21, 70.

ZHANG Xuwei, LI Hongzhi, QIAO Yongqiang, et al. Study on supercritical carbon dioxide coal-fired power generation system integrated with waste heat recovery [J]. Thermal Power Generation, 2020, 49(12): 17-21, 70.

丁立新, 王金枝, 程新华, 等. 电厂锅炉原理 [M]. 2版. 北京: 中国电力出版社, 2008.

白向飞. 中国褐煤及低阶烟煤利用与提质技术开发 [J]. 煤质技术, 2010(6): 9-11.

BAI Xiangfei. Discussion on utilization and development of improving quality technology of lignite and low rank bituminous coal China [J]. Coal Quality Technology, 2010(6): 9-11.

赵振新, 朱书全, 马名杰, 等. 中国褐煤的综合优化利用 [J]. 洁净煤技术, 2008, 14(1): 28-31.

ZHAO Zhenxin, ZHU Shuquan, MA Mingjie, et al. Comprehensive and optimal utilization of lignite in China [J]. Clean Coal Technology, 2008, 14(1): 28-31.

严俊杰, 刘明, 种道彤, 等. 预干燥燃褐煤发电系统理论研究 [J]. 西安交通大学学报, 2011, 45(5): 1-5, 58.

YAN Junjie, LIU Ming, CHONG Daotong, et al. Theoretical study on pre-dried lignite-fired power generation system [J]. Journal of Xi'an Jiaotong University, 2011, 45(5): 1-5, 58.

郭晓克, 肖峰, 严俊杰, 等. 高效褐煤发电系统研究 [J]. 中国电机工程学报, 2011, 31(26): 23-31.

GUO Xiaoke, XIAO Feng, YAN Junjie, et al. Study on efficient lignite-fired power system [J]. Proceedings of the CSEE, 2011, 31(26): 23-31.

郭晓克, 刘明, 肖峰, 等. 带废热回收的预干燥燃褐煤发电系统理论研究 [J]. 中国电机工程学报, 2012, 32(8): 44-49.GUO Xiaoke, LIU Ming, XIAO Feng, et al. Theoretical study on a pre-dried lignite-fired power system with waste heat recovery [J]. Proceedings of the CSEE, 2012, 32(8): 44-49.

张利, 张义江. 600 MW直接空冷机组抽汽预干燥褐煤的热经济性分析 [J]. 华电技术, 2016, 38(9): 48-51, 54.

ZHANG Li, ZHANG Yijiang. Thermo-economic analysis of steam extraction pre-dried lignite for 600 MW direct air-cooled generating unit [J]. Huadian Technology, 2016, 38(9): 48-51, 54.

刘明, 秦远智, 翟梦旭, 等. 褐煤抽汽预干燥发电系统变负荷特性仿真研究 [J]. 工程热物理学报, 2016, 37(1): 6-10.

LIU Ming, QIN Yuanzhi, ZHAI Mengxu, et al. Simulation study on the part-load performance of steam pre-dried lignite-fired power system [J]. Journal of Engineering Thermophysics, 2016, 37(1): 6-10.

周云龙, 姚灏, 王迪, 等. 发电机组燃用预干燥褐煤的变负荷仿真对比及投资经济性分析 [J]. 中国电机工程学报, 2019, 39(S1): 171-179.

ZHOU Yunlong, YAO Hao, WANG Di, et al. Simulation comparison and investment economy analysis of power generation units burning pre-dried lignites under variable load condition [J]. Proceedings of the CSEE, 2019, 39(S1): 171-179.

姚伟, 王志超, 屠竞毅, 等. 褐煤预干燥-乏气回收热电联产系统设计与理论分析 [J]. 中国电机工程学报, 2017, 37(13): 3795-3801.

YAO Wei, WANG Zhichao, TU Jingyi, et al. System design and theoretical analysis of lignite-fired CHP based on lignite pre-drying and waste heat recovery from dryer exhaust [J]. Proceedings of the CSEE, 2017, 37(13): 3795-3801.

刘明, 付豪, 苗国耀, 等. 集成热泵干燥的褐煤发电系统理论研究 [J]. 工程热物理学报, 2016, 37(5): 929-934.

LIU Ming, FU Hao, MIAO Guoyao, et al. Theoretical study of lignite-fired power system integrated with heat pump drying [J]. Journal of Engineering Thermophysics, 2016, 37(5): 929-934.

许宏宇, 许诚. 燃用低阶煤电站烟气余热利用方式热经济性比较 [J]. 热力发电, 2020, 49(2): 17-23.

XU Hongyu, XU Cheng. Comparison of thermal economy of waste heat utilization approaches of low-rank coal-fired power plant [J]. Thermal Power Generation, 2020, 49(2): 17-23.

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