燃尽风箱挡板偏置燃烧器风量分配的数值模拟  

Numerical Simulation on Air Flow Distribution Characteristics of Burners under Different Damper Open on Both Sides of OFA Windbox

作　　者：董亮 宋振宇 沈涛 DONG Liang;SONG Zhen-yu;SHEN Tao(State Key Laboratory of Efficient and Clean Coal-fired Utility Boilers;Harbin Boiler Co.,Ltd.)

机构地区：[1]高效清洁燃煤电站锅炉国家重点实验室 [2]哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨150046

出　　处：《电站系统工程》2020年第3期14-16,共3页Power System Engineering

摘　　要：以某电厂600 MW超临界锅炉为例,通过数值模拟的方法,对燃尽风风箱两侧挡板偏置条件下,燃尽风各只燃烧器的风量及主燃烧区同层各只燃烧器的风量变化进行了研究,同时还对燃尽风总量的变化及左右侧风道风量的变化进行了研究。结果表明:当燃尽风箱右侧挡板逐渐关小时,燃尽风燃烧器风量分配逐渐由中间风量大、两侧风量小的抛物线型向从左至右逐渐增大的分布趋势转变,主燃区同层各只燃烧器的风量分配趋势变化不大;随着燃尽风箱右侧挡板逐渐关小,燃尽风总量逐渐减小,左侧风道进风量明显高于右侧。Taking a 600 MW unit supercritical boiler as the example,numerical simulation was conducted to investigate the changes of the air flow of each OFA burner and the air flow of each burner at main combustion area in the same layer,under the different damper open on both sides of the OFA windbox,and also the change of total OFA air flow and the change of air flow in both sides of air ducts were studied. The results showed that when the right damper of OFA windbox gradually closed, the air flow distribution of OFA burner gradually changed from a parabolic type with big air flow in middle burners and small air flow on both side burners to a distribution trend with gradual increase from left to right;There was little change in air flow distribution trend of each burner in the same layer of main combustion zone;As the right damper of OFA windbox gradually closed, the total air flow of OFA burners decreased, and the air flow of the left duct was obviously higher than right side.

关 键 词：超临界锅炉 燃尽风箱挡板偏置 燃烧器风量分配 

分 类 号：TK223.2[动力工程及工程热物理—动力机械及工程]