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四角切圆燃烧方式在电厂中的应用很广泛,但是这种燃烧方式也有其自身的缺点:如燃烧器区域温度水平低,着火条件差,炉膛出口残余旋转大,水平烟道温度分布不均匀,容易产生热偏差和水冷壁的爆管等。因此近几年来四墙切圆燃烧方式具有很好的工程应用前景。以某电厂600 MW超超临界四墙切圆直流摆动式燃烧器为工程原型建立模型,通过FLUENT数值计算软件,来用数值模拟的方法研究直流摆动式燃烧器在上下不同摆角下的燃烧特性与流动特性,根据数值模拟的结果分析其燃烧特性和流动特性,确定了四墙切圆燃烧方式的合理工况,为四墙切圆燃烧锅炉的运行提供了参考。
Tangential combustion is widely used in power plants. However, this type of combustion also has its own drawbacks. For example, the temperature in the burner area is low, the ignition conditions are poor, the residual rotation of the furnace outlet is large, the temperature of the horizontal flue is unevenly distributed, Prone to thermal deviation and water wall of the squib and so on. Therefore, in recent years, the four-wall tangential combustion method has a good engineering application prospect. A 600 MW ultra-supercritical four-wall tangent circular DC wobble combustor was built for a prototype of the project. The numerical simulation was used to study the combustion characteristics of the DC wobble burners under different swing angles with FLUENT software Based on the results of numerical simulation, the combustion characteristics and flow characteristics were analyzed. The reasonable working conditions of four-wall tangent combustion mode were determined, which provided a reference for the operation of four-wall tangent combustion boiler.