石灰石-石膏湿法脱硫废水排放量深度解析

doi:10.11930/j.issn.1004-9649.201904115

中国电力 ›› 2020, Vol. 53 ›› Issue (8): 139-144,163.DOI: 10.11930/j.issn.1004-9649.201904115

石灰石-石膏湿法脱硫废水排放量深度解析

贾西部

大唐西北电力试验研究院，陕西西安 710021

收稿日期:2019-05-05 修回日期:2019-12-03 发布日期:2020-08-05
作者简介:贾西部(1982-),男,工程师,从事燃煤烟气环保、脱硫废水零排放的技术服务与研究,E-mail:63771270@qq.com
基金资助:
2017—2019年度中国大唐集团科技资助项目（燃煤机组节水及废水零排放关键技术研究）

In-depth Analysis on Wastewater Discharge of Wet Limestone-Gypsum FGD

JIA Xibu

Datang Northwest Electric Power Test & Research Institute, Xi'an 710021, China

Received:2019-05-05 Revised:2019-12-03 Published:2020-08-05
Supported by:
This work is supported by 2017—2019 Science and Technology Project of China Datang Corporation (Key Technology Research on Water Conservation and Wastewater Zero Discharge of Coal-fired Units)

摘要/Abstract

摘要： 火电厂废水零排放势在必行，其主要难点之一为石灰石-石膏湿法烟气脱硫工艺的废水处置。为得出脱硫废水的合理排放量，以典型350 MW燃煤机组为例，从进入和排出脱硫系统的氯离子（Cl^–）量入手，以脱硫吸收塔浆液Cl^–平衡浓度控制为基准，对入炉煤、脱硫工艺水、脱硫石膏排出、脱硫废水排出等进行了Cl^–物料平衡计算。在此基础上分析了脱硫系统深度优化和烟气深度治理等工程对脱硫系统水平衡的影响。

关键词: 燃煤机组, 石灰石-石膏湿法脱硫, 氯离子, 物料衡算, 脱硫废水排放量

Abstract: The trend of zero wastewater discharge policy is inevitable for coal-fired plants despite the major technical difficulty in the discharge of wet limestone-gypsum FGD wastewater. To obtain reasonable discharge amount of FGD wastewater, the author took the example of a 350 MW coal-fired unit in the case studies with the source and discharge of chloride ion amount as the starting point. Then benchmarked on the chloride ion balance concentration in the absorber slurry, the material balance of chloride ion from coal input, FGD process water, gypsum output, wastewater discharge, etc. were calculated. On this basis, the effects of the engineering projects on FGD water were explored such as in-depth optimization of desulfurization system and in-depth flue gas treatment, which will provide substantial data support for the feasibility research of zero discharge projects for terminal wastewater treatment.

Key words: coal-fired power plants, FGD, chloride ion, material balance, FGD wastewater discharge amount

贾西部. 石灰石-石膏湿法脱硫废水排放量深度解析[J]. 中国电力, 2020, 53(8): 139-144,163.

JIA Xibu. In-depth Analysis on Wastewater Discharge of Wet Limestone-Gypsum FGD[J]. Electric Power, 2020, 53(8): 139-144,163.

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石灰石-石膏湿法脱硫废水排放量深度解析

In-depth Analysis on Wastewater Discharge of Wet Limestone-Gypsum FGD

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石灰石-石膏湿法脱硫废水排放量深度解析

In-depth Analysis on Wastewater Discharge of Wet Limestone-Gypsum FGD

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