Collaborative optimization of energy conversion and NOx removal in boiler cold-end of coal-fired power plants based on waste heat recovery of flue gas and sensible heat utilization of extraction steam

被引：28
|
作者：
Han, Yu [1 ]
Sun, Yingying [1 ]
机构：
[1] Nanjing Inst Technol, Sch Energy & Power Engn, Nanjing 211167, Peoples R China
来源：
ENERGY | 2020年 / 207卷
基金：
中国国家自然科学基金;
关键词：
Energy conversion; NOx removal; Collaborative optimization; Boiler cold-end; Coal-fired power plants; LIGNITE PREDRYING SYSTEM; THERMODYNAMIC ANALYSIS; BYPASS FLUE; INTEGRATION; COMBUSTION; CATALYSTS; CYCLE; FLOW;
D O I：
10.1016/j.energy.2020.118172
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Based on the close relationship among the feed water heating process, Selective catalytic reduction (SCR) de-NOx and air preheating process, collaborative optimization of energy conversion and NOx removal in the boiler cold-end of coal-fired power plants is proposed in this paper. In the proposed system, recovery of flue gas waste heat and sensible heat efficient utilization of extraction steam provide engineering support for the collaborative optimization concept. The proposed system achieves optimal performance by increasing SCR de-NOx temperature and energy for air preheating. The results reveal that, based on 50% load of a typical 1000 MW coal-fired power plant, the proposed system could increase 5.4 MWe of additional output power with a 0.47% increase of thermal efficiency. The increase of SCR de-NOx temperature brings 6.5% of NOx removal efficiency increase and 28.4 mg/Nm(3) of NOx emission decrease. Besides, the proposed system gains 2.27 million USD of extra annual income. In general, the proposed system achieves great energy savings, NOx removal, and economic performances. (C) 2020 Elsevier Ltd. All rights reserved.
引用
收藏
页数：14
相关论文
共 32 条
  • [21] Waste heat utilization from boiler exhaust gases for zero liquid discharge of desulphurization wastewater in coal-fired power plants: Thermodynamic and economic analysis
    Han, Xiaoqu
    Yuan, Tianrun
    Zhang, Dan
    Dai, Yanbing
    Liu, Jiping
    Yan, Junjie
    JOURNAL OF CLEANER PRODUCTION, 2021, 308
  • [22] Waste heat recovery from sodium-based CO2 capture process in coal-fired power plants
    基于钠基吸附剂的烟气脱碳系统余热利用研究
    Chen, Xiaoping (xpchen@seu.edu.cn), 1600, Materials China (39): : 720 - 727
  • [23] Comparative Evaluation of Integrated Waste Heat Utilization Systems for Coal-Fired Power Plants Based on In-Depth Boiler-Turbine Integration and Organic Rankine Cycle
    Huang, Shengwei
    Li, Chengzhou
    Tan, Tianyu
    Fu, Peng
    Wang, Ligang
    Yang, Yongping
    ENTROPY, 2018, 20 (02):
  • [24] Thermo-economic optimization of the thermal energy storage system extracting heat from the reheat steam for coal-fired power plants
    Zhang, Kezhen
    Liu, Ming
    Zhao, Yongliang
    Zhang, Shunqi
    Yan, Hui
    Yan, Junjie
    APPLIED THERMAL ENGINEERING, 2022, 215
  • [25] Simulation and techno-economic analysis of moisture and heat recovery from original flue gas in coal-fired power plants by macroporous ceramic membrane
    Zhao, Chunhao
    Wang, Zhengfeng
    Gao, Dan
    Chen, Haiping
    Zhang, Heng
    ENERGY, 2022, 259
  • [26] Multi-parameter Optimization and Operation Strategy of Fluegas Waste Heat and Water Co-recovery System for Coal-fired Power Plants
    Yang K.
    Feng Y.
    Liu M.
    Yan J.
    Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering, 2021, 41 (13): : 4566 - 4575
  • [27] Coupling of the S-CO2 cycle and ORC to realize an efficient utilization scheme of flue gas waste heat for the coal-fired power generation system
    Guo Y.
    Sun E.
    Xu J.
    Liu G.
    Wang Z.
    Liu G.
    Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica, 2023, 53 (03): : 375 - 384
  • [28] Energy efficiency and economic analysis of a novel polygeneration system based on LNG cold energy utilization and wet flue gas waste heat recovery
    Zhen, Shangguan
    Rui, Ziliang
    Zhang, Shulin
    He, Juan
    Chen, Lei
    Wang, Zhicheng
    Peng, Hao
    APPLIED THERMAL ENGINEERING, 2025, 260
  • [29] Exergoeconomic analysis and multi-objective optimization of a CCHP system based on LNG cold energy utilization and flue gas waste heat recovery with CO2 capture
    Liu, Yang
    Han, Jitian
    You, Huailiang
    ENERGY, 2020, 190
  • [30] Energy and Exergy Analysis of a New Cogeneration Heating System Based on Condensed Waste-Heat Utilization in the Direct Air Cooling Coal-Fired Power Plant
    Zhang, Hongsheng
    Liu, Xingang
    Liu, Yifeng
    Hao, Ruijun
    Liu, Chengjun
    Duan, Chenghong
    Dou, Zhan
    Qin, Jiyun
    JOURNAL OF ENERGY ENGINEERING, 2022, 148 (02)
1234