陈俊,孙玉柱,潘存华,秦阳,曹蓝田,崔运静,马培勇,祁风雷

• 1:中国大唐集团科学技术研究总院有限公司华东电力试验研究院
• 2:合肥工业大学机电产品低碳循环利用技术与装备安徽省重点实验室
• 3:中国石油大学(华东)机电工程学院

摘要(Abstract)：

燃气-蒸汽联合循环发电中燃气轮机与余热锅炉主体经常采用大扩张角过渡段连接，导致下游烟气流动不均匀，影响余热锅炉NO_x选择性催化还原烟气脱硝效率。对此，提出通过布置三级导流板来改善烟道内烟气的流动均匀性，并采用计算流体力学模拟方法研究过渡段导流板布置形式、安装角度及布置密度等参数对烟道内烟气流动特性的影响规律。结果表明：未设置导流装置时过渡段出现明显漩涡，涡度可达20 m~(-1)，导致烟气流动均匀性差；过渡段安装一级变倾角导流板可显著抑制漩涡的尺寸，安装二级变倾角导流板可显著改善过渡段内烟气流动均匀性，但是烟道后端烟气速度均匀性仍不高，安装三级导流板可同步改善过渡段和烟道内烟气流动均匀性，在换热模块三之后相对速度标准差系数降至2.1%。优化的导流板布置为：一级导流板水平投影长度2.25 m，间距1.20 m，角度15°～30°等差递增；二级导流板水平投影长度1.36 m，间距1.40 m，角度15°～60°等差递增；三级导流板长度0.70 m，间距1.00 m，水平安装。研究结果可为烟气均流装置的设计提供理论指导。

关键词(KeyWords)： 燃气余热锅炉;导流板;CFD;流动均匀性

Abstract:

Keywords:

基金项目(Foundation): 合肥市关键共性技术“揭榜挂帅”（GJ2022QN02）;; 中央高校基本科研业务费专项资助（PA2023GDSK0119）~~

作者(Author): 陈俊,孙玉柱,潘存华,秦阳,曹蓝田,崔运静,马培勇,祁风雷

DOI: 10.19666/j.rlfd.202401022

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