燃煤机组“消白”技术排烟温度的理论分析
摘要：燃煤机组湿法脱硫后，产生的湿烟气由烟囱排入温度较低的环境中会遇冷凝结，即冒“白烟”现象。建立了燃煤机组各“消白”技术的排烟温度的理论计算模型，并以西安、石家庄、上海地区为例计算研究不同地区“消白”技术的特点。结果表明，环境温度较高时，烟气直接加热法可有效消除白烟；环境温度低时，烟气降温再热法可以更有效地消除白烟。春夏季可以采用直接加热法消除白烟，排放烟温根据环境因素应控制在60~75℃；在秋冬季，当环境温度在9℃、相对湿度为60%以下时，建议采用降温再热法消除白烟，秋季可先降到45℃再加热到75℃排放，冬季可先降到45℃再加热至85℃排放。
Abstract:When the flue gas passes through the wet desulfurization of the coal-fired unit, its temperature drops and becomes saturated when it is discharged into the environment through the chimney, and then the condensation is formed, called as "white smoke" phenomenon. The theoretical calculation model of exhaust gas temperature for each white smoke elimination technology of coal-fired units was established. The characteristics of white smoke elimination technology in different regions were calculated by taking Xi'an, Shijiazhuang and Shanghai as examples. Results show that the flue gas directly heating method can effectively eliminate white smoke when the ambient temperature is high. When the ambient temperature is low, the flue gas cooling and reheating method would be more effectively. In spring and summer, the white smoke can be eliminated by directly heating method, and the exhaust flue gas temperature should be controlled between 60℃ and 75℃ according to environmental factors. In autumn and winter, when the ambient temperature is 9℃ and the relative humidity is 60% or less, the white smoke should be removed by the cooling and reheating method. In autumn, the flue gas temperature should be lowered to 45℃ and then heated to 75℃. In winter, it can be lowered to 45℃ and then heated to 85℃.
标题：燃煤机组“消白”技术排烟温度的理论分析
title:Theoretical Analysis of Flue Gas Exhaust Temperature of White Smoke Elimination Technology for Coal-fired Units
作者：范江,黄晨希,陈伟雄,刘继平,严俊杰
authors:Jiang FAN,Chenxi HUANG,Weixiong CHEN,Jiping LIU,Junjie YAN
关键词：湿法脱硫,消白,直接加热,降温再热,
keywords:wet desulfurization,white smoke elimination,directly heating,cooling and reheating,
发表日期：2019-06-30
- 文件大小:
- 214.93 KB
- 下载次数:
- 60
-
高速下载
|
|
