燃煤电厂逃逸氨迁移转化特性研究进展

doi:10.16085/j.issn.1000-6613.2021-0449

化工进展 ›› 2022, Vol. 41 ›› Issue (2): 964-973.DOI: 10.16085/j.issn.1000-6613.2021-0449

燃煤电厂逃逸氨迁移转化特性研究进展

郑成强¹^,²(), 李小龙¹^,², 李军状¹^,², 段玖祥¹^,², 杨林军³()

^1.国家能源集团科学技术研究院有限公司，江苏南京 210023
^2.国能南京电力试验研究有限公司，江苏南京 210023
^3.东南大学能源与环境学院，江苏南京 210096

收稿日期:2021-03-07 修回日期:2021-04-28 出版日期:2022-02-05 发布日期:2022-02-23
通讯作者: 杨林军
作者简介:郑成强（1995—），男，硕士，研究方向为燃煤电厂大气污染防治。E-mail：zhenginnj@163.com。
基金资助:
国家自然科学基金面上项目(41771498);国家能源集团2019年度科技创新项目(GJNY-19-158)

Research progress on migration and transformation characteristics of escaped ammonia in coal-fired power plants

ZHENG Chengqiang¹^,²(), LI Xiaolong¹^,², LI Junzhuang¹^,², DUAN Jiuxiang¹^,², YANG Linjun³()

^1.China Energy Science and Technology Research Institute Co. , Ltd. , Nanjing 210023, Jiangsu, China
^2.Guoneng Nanjing Electric Power Test & Research Limited, Nanjing 210023, Jiangsu, China
^3.School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2021-03-07 Revised:2021-04-28 Online:2022-02-05 Published:2022-02-23
Contact: YANG Linjun

摘要/Abstract

摘要：

我国燃煤电厂实施超低排放改造后，逃逸氨超标现象日渐凸显。过大的逃逸氨给烟气处理设施的正常运行和大气环境带来消极影响，逃逸氨的控制与排放已成为今后燃煤电厂大气污染防治方面的工作重点之一。本文分析了燃煤电厂逃逸氨的产生来源，综述了逃逸氨的排放特性，包括逃逸氨在各环保设施中的排放浓度和主要形态。分析了逃逸氨在脱硝及其下游烟气处理设施中的迁移转化，以及影响各烟气处理设施对逃逸氨捕集效率的因素。最后基于污染物排放因子研究现状，展望了未来燃煤电厂逃逸氨控制的研究方向有：推进燃煤电厂逃逸氨监测和排放标准的制定与落实，优化工艺条件促进现有烟气处理系统对逃逸氨的协同脱除作用，跟踪含氨副产物如粉煤灰、脱硫废水和石膏等在后续处理过程中的氨再释放情况。

关键词: 燃煤电厂, 逃逸氨, 迁移转化特性, 排放因子

Abstract:

After the implementation of ultra-low emission transformation in coal-fired power plants in China, the trend of escaped ammonia exceeding the standard has become increasingly prominent. Excessive escaped ammonia has a negative impact on the normal operation of flue gas treatment facilities and the atmospheric environment. The control and emission of escaped ammonia have become one of the priorities of coal-fired power plants’ air pollution prevention and control work in the future. In this paper, the source of escaped ammonia in coal-fired power plants is analyzed, and the emission characteristics of escaped ammonia is summarized, including the emission concentration and main forms of fugitive ammonia in various environmental protection facilities. The migration and transformation of the escaped ammonia in the denitrification and downstream flue gas treatment facilities, and the factors that affect the efficiency of the flue gas treatment facilities for the capture of escaped ammonia are analyzed. Finally, based on the current research status of pollutant emission factors, the future research directions of escaped ammonia control in coal-fired power plants are prospected as follows: promoting the establishment and implementation of escaped ammonia inspection and emission standards for coal-fired power plants, optimizing process conditions to promote the synergistic removal of escaping ammonia by the existing flue gas treatment system, and tracking the ammonia re-release of ammonia-containing by-products such as fly ash, desulfurization wastewater and gypsum in the subsequent treatment process.

Key words: coal-fired power plant, NH₃ slip, migration and transformation, emission factor

中图分类号:

郑成强, 李小龙, 李军状, 段玖祥, 杨林军. 燃煤电厂逃逸氨迁移转化特性研究进展[J]. 化工进展, 2022, 41(2): 964-973.

ZHENG Chengqiang, LI Xiaolong, LI Junzhuang, DUAN Jiuxiang, YANG Linjun. Research progress on migration and transformation characteristics of escaped ammonia in coal-fired power plants[J]. Chemical Industry and Engineering Progress, 2022, 41(2): 964-973.

图/表 5

图1 SCR装置内逃逸氨迁移转化

图2 空预器内逃逸氨迁移转化

图3 电除尘器内逃逸氨迁移转化

图4 湿法脱硫过程逃逸氨迁移转化

图5 湿式电除尘器内逃逸氨迁移转化

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燃煤电厂逃逸氨迁移转化特性研究进展

Research progress on migration and transformation characteristics of escaped ammonia in coal-fired power plants

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