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一、前言 国产30万千瓦直流锅炉炉膛水冷壁采用一次上升的小管径膜式结构,中间布置混合器和分配集箱,经两次混合和分配,将水冷壁沿高度分为上、中、下三个辐射区。第一级混合点位于下辐射出口中辐射进口处,汽水混合物干度约为50％,第二级混合点位于中辐射出口上辐射进口处,工质已为微过热蒸汽。 姚孟电厂1号炉系30万千瓦燃煤锅炉,自投运以来屡次发生因水冷壁产生横向裂纹
First, the preface Domestic 300000 kilowatts of the DC boiler furnace water wall using a small diameter pipe membrane structure, the middle of the mixer and distribution header set, after two mixing and distribution, the water wall along the height is divided into upper, The next three radiation zones. The first mixing point is located at the radiation inlet of the lower radiation outlet, and the dryness of the soda mixture is about 50%. The second mixing point is located at the radiation inlet of the middle radiation outlet and the working substance is slightly superheated steam. Yao Meng Power Plant No. 1 furnace 300,000 kilowatts coal-fired boilers, since commissioning has repeatedly occurred due to water wall cracks occur