超低排放机组双塔双循环脱硫系统能耗物耗特性分析

doi:10.11930/j.issn.1004-9649.202107057

中国电力 ›› 2022, Vol. 55 ›› Issue (6): 208-214.DOI: 10.11930/j.issn.1004-9649.202107057

• 节能与环保 • 上一篇

超低排放机组双塔双循环脱硫系统能耗物耗特性分析

杜振¹, 张成², 朱跃¹

1. 华电电力科学研究院有限公司，浙江杭州　310030;
2. 广东海洋大学，广东湛江　524088

收稿日期:2021-07-10 修回日期:2022-01-05 出版日期:2022-06-28 发布日期:2022-06-18
作者简介:杜振（1985—），男，硕士，高级工程师，从事火电厂大气污染综合治理、细颗粒物污染物控制技术研究，E-mail：adozn@163.com;张成（1986—），男，通信作者，博士，讲师，从事能源开发与利用技术研究，E-mail：hustquick@gdou.edu.cn
基金资助:
中国华电集团有限公司重点科技项目（火电厂“厂界环保岛”多介质污染物排放控制技术研究，CHDKJ20-01-69）。

Analysis of Energy and Material Consumption Characteristics of Double Tower Double Cycle Desulfurization System for Ultra Low Emission Unit

DU Zhen¹, ZHANG Cheng², ZHU Yue¹

1. Huadian Electric Power Research Institute Co., Ltd., Hangzhou 310030, China;
2. Guangdong Ocean University, Zhanjiang 524088 , China

Received:2021-07-10 Revised:2022-01-05 Online:2022-06-28 Published:2022-06-18
Supported by:
This work is supported by the Key Technology Projects of China Huadian Group Co., Ltd. (Study on Multi Medium Pollutant Emission Control Technology of “Plant Boundary Environmental Protection Island” in Thermal Power Plant, No.CHDKJ20-01-69)

摘要/Abstract

摘要： 为系统分析双塔双循环脱硫系统能耗物耗特性，通过对53台双塔双循环脱硫系统电耗、水耗和石灰石耗量情况进行测试，研究入口SO₂浓度、液气比、pH值以及Ca/S比对单位质量SO₂脱除能耗物耗特性的影响。结果表明，双塔双循环脱硫系统SO₂脱除成本中脱除能耗成本占整体脱除成本的55%~80%，而脱除能耗中循环浆液泵电耗占总能耗的50%~70%，一二级吸收塔的SO₂单位脱除能耗均随入口SO₂浓度的增高而降低，二级吸收塔的SO₂单位脱除能耗远大于一级吸收塔，一二级吸收塔内SO₂单位脱除能耗均随pH 值的升高而先降后增。因此，为降低双塔双循环脱硫系统单位质量SO₂脱除能耗物耗水平，一级吸收塔入口SO₂质量浓度应控制在4 000~6 000 mg/m³，浆液pH值应控制在5.2左右；二级吸收塔入口SO₂质量浓度应控制在1200 mg/m³，浆液pH值应控制在6.0左右。

关键词: 双塔双循环脱硫系统, 能耗, 物耗, pH值, 液气比

Abstract: In order to systematically analyze the energy and material consumption characteristics of double tower double cycle desulfurization system, testing the power consumption, water consumption and limestone consumption at the exit of double tower double cycle desulfurization systems in 53 ultra-low emission units. And study the effects of inlet SO₂ concentration, liquid gas ratio, pH value and Ca/S ratio on the energy and material consumption characteristics of unit mass SO₂ removal. The measurement results indicate that the the energy consumption of SO₂ removal accounts for 55%~80% of the total removal cost, while the power consumption of circulating slurry pump accounts for 50%~70% of the total energy consumption. The energy consumption per unit of SO₂ removal in primary and secondary absorption tower decreases with the increase of inlet SO₂ concentration, and the energy consumption per unit of SO₂ removal in secondary absorption tower is much higher than that in primary absorption tower, The energy consumption per unit of SO₂ removal in the first and second stage absorption towers decreased first and then increased with the increase of pH value. Which shows that in order to reduce the energy and material consumption per unit mass of SO₂ in the double tower double cycle desulfurization system, the SO₂ concentration at the inlet of the primary absorption tower should be controlled at 4 000~6 000 mg/m³, and the slurry pH value should be controlled at about 5.2; The concentration of SO₂ at the inlet of secondary absorption tower should be controlled at 1200 mg/m³, and the pH value of slurry should be controlled at about 6.0.

Key words: double tower double cycle desulfurization system, energy consumption, material consumption, pH value, liquid gas ratio

杜振, 张成, 朱跃. 超低排放机组双塔双循环脱硫系统能耗物耗特性分析[J]. 中国电力, 2022, 55(6): 208-214.

DU Zhen, ZHANG Cheng, ZHU Yue. Analysis of Energy and Material Consumption Characteristics of Double Tower Double Cycle Desulfurization System for Ultra Low Emission Unit[J]. Electric Power, 2022, 55(6): 208-214.

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超低排放机组双塔双循环脱硫系统能耗物耗特性分析

Analysis of Energy and Material Consumption Characteristics of Double Tower Double Cycle Desulfurization System for Ultra Low Emission Unit

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超低排放机组双塔双循环脱硫系统能耗物耗特性分析

Analysis of Energy and Material Consumption Characteristics of Double Tower Double Cycle Desulfurization System for Ultra Low Emission Unit

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