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早期国产高压锅炉,采取减温器联箱与过热器联箱合用的方案。蒸汽从上一段过热器流入联箱在减温器外夹缝改变流向180°转弯经减温器流入下段过热器。减温器多选用水室文丘里型结构,部分选用单喷头式结构。两种减温器运行后极易损坏,尤其高温段减温器最为严重。损坏之处如水室内壁喷孔间和壁厚过渡部位有裂纹,水室与进水管连接焊缝断裂,喷头或连接水管根部断裂,扩压管、混合管(即保护套管)断裂和变形位移及其支承部件脱落等。
Early domestic high-pressure boilers, desuperheaters to take the header and the header together with the program. Steam from the last superheater into the header in the descending outside the folder to change the flow of 180 ° turn through the desuperheater into the lower superheater. More use of desuperheater water venturi-type structure, part of the choice of single-nozzle structure. After the operation of two desuperhensive easily damaged, especially in the most high-temperature desuperheater. Damage such as cracks in the water chamber wall between the spray holes and the wall thickness transition, the water chamber and the inlet pipe weld fracture, the nozzle or connecting the root of the water pipe fracture, diffuser, mixing tube (ie, protective sleeve) fracture and deformation displacement And its support members fall off.