一、问题的提出卧式外燃双层炉排螺纹管锅炉是一种卧式三回程水火管混合式新型锅炉,它具有热效率高,消烟除尘效果好等许多优点,所以得到了广泛的推广使用。我市已安装十多台这类型的锅炉,但从使用管理和锅炉定期检验来看,最突出最普遍的问题表现在锅壳底部水循环不良,排污效果不好。如:我市龙口棉站油厂使用的一台WWG 1—7 AⅡ锅炉,原水使用的是池塘滤水,使用炉内加碱水处理法,投入运行不到一年,今年7月锅炉定检时,发现锅筒内前下部堆积了许多泥渣和水垢,水冷炉排管几 First, the problem put forward Horizontal double layer grate spiral pipe boiler is a horizontal three return water fire tube hybrid new boiler, which has high thermal efficiency, smoke and dust removal effect and many other advantages, it has been widely promoted use. The city has installed more than a dozen of these types of boilers, but from the use of management and periodic inspection of the boiler, the most prominent problems most common in the bottom of the shell water cycle is poor, the sewage effect is not good. Such as: the city of Longkou Cotton Station WWW 1-7 A Ⅱ boiler used in a boiler, the raw water is the pond drainage, the use of furnace plus alkali treatment, put into operation less than a year in July this year, boiler inspection When found in the lower part of the drum before the accumulation of a large number of mud and scale, water-cooled grate tube a few