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近几年热水锅炉靠回水引射锅水以提高上升管流速办法,已得到广泛采用,而锅炉内部附件回水分配管的安装质量却常不被重视,给锅炉安全运行留下隐患。某单位一台1995年生产的DZW4.2—O.7/95/70～AⅡ热水锅炉,于1995年10月安装,11月10日正式投入运行。锅炉运行不到两个月于1996年1月6日右侧水冷壁管前数第7根爆管,紧急停炉后,放掉锅水,在锅筒、集箱外侧距锅筒、集箱15～20mm处割去
In recent years, hot water boilers rely on backwater lead boiler water to increase the riser flow rate has been widely adopted, and the quality of the installation of the backwater distribution pipe inside the boiler is often not taken seriously, leaving a hidden danger to the safe operation of the boiler. A unit of a 1995 production of DZW4.2-O.7 / 95/70 ~ A Ⅱ hot water boiler, installed in October 1995, November 10 formally put into operation. Boiler operation less than two months in January 6, 1996 the right side of the water pipe before the seventh number of squib tube, emergency shutdown, drain the pot water, in the drum, the outer header from the drum, header 15 ~ 20mm at the cut off