余热锅炉烟气低温余热回收塔流场均匀性研究  

Research on the Uniformity of Flow Field in the Low-Temperature Waste Heat Recovery Tower of Waste Heat Boiler Flue Gas

作　　者：潘晓伟 彭烁[2] 李硕 周贤[2] 王长军[1] 刘峻 王瑞元 PAN Xiaowei;PENG Shuo;LI Shuo;ZHOU Xian;WANG Changjun;LIU Jun;WANG Ruiyuan(Huaneng Beijing Thermal Power Co.,Ltd.,Beijing 102209,China;State Key Laboratory of Coal-Based Clean Energy,Beijing 102209,China)

机构地区：[1]华能北京热电有限责任公司,北京100023 [2]中国华能集团清洁能源技术研究院有限公司,北京102209

出　　处：《中国电力》2022年第3期159-166,共8页Electric Power

基　　金：国家重点研发计划资助项目(CO_2近零排放的煤气化发电系统物质与能量协同优化研究,2017 YFB0601901)。

摘　　要：烟气余热回收塔能通过塔内气-水换热过程,回收烟气显热和水蒸气汽化潜热,降低机组排烟温度,并且回收大量冷凝水。塔内空气动力场均匀性在很大程度上影响余热回收塔冷却性能,本文以某电厂逆流余热回收塔为研究对象,对入口导流板及布风板对塔内空气动力场均匀性的影响进行数值模拟研究,结果表明:增加布风板后,在布风板V型板出口,形成多股较小气流,起到整流均布作用;在布风板基础上继续增加入口导流板,余热回收塔内流场均匀性得到进一步改善,可保证布风板V型板入口气流速度分布均匀;增加布风板会增加余热回收塔流动损失,在布风板基础上继续增加入口导流板,余热回收塔流动损失会得到适当减小。The packed waste heat absorption tower can recover the sensible heat of the flue gas and latent heat of vaporization through the gas-water heat exchange process in the tower.Then the exhaust temperature is reduced,and a large amount of condensed water is recovered.The uniformity of the aerodynamic field in the tower greatly affects the cooling performance of the waste heat recovery tower.This article focuses on the counterflow waste heat recovery tower of a power plant.The influence of the inlet baffle and air distribution plate on the uniformity of the aerodynamic field in the tower is carried out.The results show that,adding the air distribution plate,multiple smaller air flows are formed at the exit of the V-shaped plate of the air distribution plate,which plays a role of rectification and uniform distribution.The uniformity of the flow field in the waste heat recovery tower has been further improved if increasing the inlet deflector on the basis of the air distribution plate.The waste heat recovery Tower flow loss will be increased when adding the air distribution plate.The flow loss of the waste heat recovery tower will be appropriately reduced when increasing the inlet baffle on the basis of the air distribution plate.

关 键 词：余热回收塔 流场 均匀性 数值模拟 

分 类 号：X773[环境科学与工程—环境工程]