燃煤锅炉脱硫湿烟羽脱白可行性研究

doi:10.12096/j.2096-4528.pgt.20021

发电技术 ›› 2021, Vol. 42 ›› Issue (5): 622-629.DOI: 10.12096/j.2096-4528.pgt.20021

燃煤锅炉脱硫湿烟羽脱白可行性研究

周峰¹(), 支晓欢², 沈达¹, 江建军¹, 邹建¹, 徐海涛²(), 李强¹, 梁银春¹

¹ 南通醋酸纤维有限公司, 江苏省南通市 226008
² 南京工业大学环境科学与工程学院, 江苏省南京市 211800

收稿日期:2020-11-08 出版日期:2021-10-31 发布日期:2021-10-13
作者简介:周峰(1985), 男, 博士, 工程师, 主要研究方向为火电厂大气污染控制, 237802215@qq.com
支晓欢(1996), 男, 硕士研究生, 主要从事电厂烟气治理研究
徐海涛(1977), 男, 博士, 教授, 主要从事环境工程、废气、废水方面的研究, htxu@njtech.edu.cn
基金资助:
江苏省重点研发项目(BE2018074)

Feasibility Study of White Smoke Removal of Flue Gas From Wet Desulphurization in Coal-fired Boiler

Feng ZHOU¹(), Xiaohuan ZHI², Da SHEN¹, Jianjun JIANG¹, Jian ZOU¹, Haitao XU²(), Qiang LI¹, Yinchun LIANG¹

¹ Nantong Cellulose Fibers Co., Ltd., Nantong 226008, Jiangsu Province, China
² College of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211800, Jiangsu Province, China

Received:2020-11-08 Published:2021-10-31 Online:2021-10-13
Supported by:
Key Research and Development Program of Jiangsu Province(BE2018074)

摘要/Abstract

摘要：

湿法脱硫出口的饱和烟气直接由烟囱排入环境会形成“白烟”，产生视觉污染。为了完全消除“白烟”现象，阐述了“白烟”生成和脱白的机理，对比了不同湿烟气脱白的技术特点和适用范围。以南通某燃煤锅炉湿法脱硫烟气为例，通过分析2014—2016年的气象数据，绘制温湿图，确定脱白控制区及无白烟天数控制线。选取气象条件最差的2016年作为设计基准，分析选定烟气冷凝升温技术作为脱白工艺路线。通过分析控制白烟温降温升关系，得出实现不同的白烟控制线所对应的冷凝温度与升温幅度关系，从而选取最经济的冷凝温度和升温幅度，为烟气冷凝升温脱白工艺路线的经济运行提供理论参考。

关键词: 湿烟羽, 烟气脱白, 温湿图, 冷凝升温技术

Abstract:

Wet plume forms when the wet flue gas from the wet desulphurization system exits into the ambient air, which would bring about visual pollution. In order to completely eliminate the phenomenon of wet plume, the mechanism of the generation and de-whitening of "white smoke" was described firstly, and the technical characteristics and application scope of different wet smoke de-whitening were compared. Take a coal-fired boiler in Nantong area as an example, the enthalpy and humidity map was drawn by analyzing the meteorological data from 2014 to 2016, determine the white smoke elimination control zone and the white smoke control line.The worst weather conditions in 2016 were selected as the design basis, and the flue gas condensation heating technology was selected as the de-whitening process route. By analyzing the relationship between temperature drop and temperature rise of white smoke control line, the relationship between condensation temperature and temperature rise range corresponding to different white smoke control lines was obtained, so as to select the most economical condensation temperature and temperature rise range, which provides theoretical reference for the economic operation of flue gas condensation heating and de whitening process.

Key words: wet plume, flue gas de-whitening, humidity temperature map, condensation and reheating composite technology

中图分类号:

TK16

周峰, 支晓欢, 沈达, 江建军, 邹建, 徐海涛, 李强, 梁银春. 燃煤锅炉脱硫湿烟羽脱白可行性研究[J]. 发电技术, 2021, 42(5): 622-629.

Feng ZHOU, Xiaohuan ZHI, Da SHEN, Jianjun JIANG, Jian ZOU, Haitao XU, Qiang LI, Yinchun LIANG. Feasibility Study of White Smoke Removal of Flue Gas From Wet Desulphurization in Coal-fired Boiler[J]. Power Generation Technology, 2021, 42(5): 622-629.

图/表 10

图1 饱和湿空气的温湿图

Fig.1 Humidity temperature map of saturated humid air

图2 烟气加热消除白烟机理

Fig.2 Elimination of white smoke by flue gas heating

图3 烟气冷凝消除白烟机理

Fig.3 Elimination of white smoke by flue gas condensation

图4 烟气冷凝再热消除白烟机理

Fig.4 Elimination of white smoke by flue gas cooling and reheating method

图5 南通地区2014—2016年间每天对脱白最不利的气象数据图

Fig.5 The most unfavorable meteorological data map of flue gas de-whitening in Nantong from 2014 to 2016

图6 无白烟次数按月份及按时段分布情况

Fig.6 Distribution of no white smoke times by month and by period

图7 脱白天数控制机理

Fig.7 Control mechanism of no white smoke days in flue gas

图8 各年100%、90%及80%无白烟天数控制线

Fig.8 Control line of 100%, 90% and 80% days without white smoke in each year

图9 2014—2016年40%~100%无白烟天数最低斜率控制线

Fig.9 Minimum slope control line for 40% to 100% days without white smoke from 2014 to 2016

图10 控制白烟时温降与温升的关系

Fig.10 Relationship between temperature drop and temperature rise without white smoke

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燃煤锅炉脱硫湿烟羽脱白可行性研究

Feasibility Study of White Smoke Removal of Flue Gas From Wet Desulphurization in Coal-fired Boiler

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