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目前在用的热水锅炉中,有相当一部分是KZ型蒸汽锅炉改为热水锅炉使用的。由于存在某些原因,锅壳下部高温区发生过热变形,严重影响生产和生活。产生变形的原因:一、锅壳下部形成死水区通过几年的锅炉检验发现,绝大多数的KZ型汽改水锅炉的回水管,接在该炉侧联箱和后联箱的排污管上(强制循环)。这样改法,使原蒸汽锅炉的自然水循环受到破坏,即全部管子为上升管。由于两侧下降管管径较大,水流量过多,原水冷壁管径较小,流量受限,出现热偏差。这样流程,两侧上升,因而锅壳下部水循环不好,形成死水区,加上水垢,沉
Currently used in hot water boiler, a considerable part of the KZ-type steam boiler into a hot water boiler. Due to some reasons, overheating deformation occurs in the high temperature zone in the lower part of the shell, seriously affecting the production and life. Deformation causes: First, the lower part of the shell to form a stagnant water area After several years of boiler inspection found that the vast majority of KZ steam water boilers return pipes, connected to the side of the furnace and the header after the tank on the sewage (Forced loop). This method, so that the original steam boiler natural water cycle is destroyed, that is, all the tubes for the riser. As both sides of the descending pipe diameter, water flow too much, the original water wall diameter is small, limited flow, thermal deviation. This process, both sides of the rise, so the lower part of the shell water cycle is not good, the formation of stagnant water, coupled with scale, sediment