Energy Saving Analysis and Comparison of Flue Gas Temperature Regulation Coupling Waste Heat Recovery Process System at the Entrance of Wet Desulfurization Tower

被引：0
|
作者：
Deng Q. [1 ]
Ran J. [1 ]
Yang Z. [1 ]
Pu G. [1 ]
Yan Y. [1 ]
Niu J. [1 ]
机构：
[1] Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Shapingba District, Chongqing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 23期
关键词：
Coal saving; Exergy loss; Flue gas conditioning; Waste heat recovery; Wet desulfurization;
D O I：
10.13334/j.0258-8013.pcsee.200781
中图分类号：
学科分类号：
摘要：
The desulfurization system in thermal power plant has high energy consumption, and the flue gas in front of the desulfurization tower has great potential for recovery of waste heat. Reasonable flue gas parameters at the entrance of the desulfurization tower can improve desulfurization performance and reduce water consumption. In this paper, four coupling schemes of flue gas temperature regulation with waste heat recovery were proposed, and energy consumption, investment and coal saving of the unit were calculated. Combined with the principle of minimum exergy loss due to energy inflow temperature difference, an optimized graded flue gas conditioning and waste heat recovery scheme was proposed under the condition of ensuring high desulfurization efficiency. The waste heat could be recovered to the sixth and seventh low pressure heaters, which could reduce the percentage of exergy to 1.05%, and the standard coal consumption of generating units could be reduced by 3.29g/(kW•h). © 2020 Chin. Soc. for Elec. Eng.
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页码：7667 / 7674
页数：7
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