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在锅炉的锅筒,每组水冷壁的下集箱最处都应装有排污阀,目的是锅炉经过运行供汽后,由于炉水不断蒸发而浓缩,炉水碱度过高产生泥渣水垢。由于水垢导热系数只有钢材的二十至五十分之一,导热性能很差,一是造成能源的浪费,二是炉内积垢过多、过厚易造成钢板(管)过热变形、鼓包
In the boiler drum, the bottom of each set of water wall should be installed at the top of the sewage valve, the purpose is to run the boiler after the supply of steam, due to evaporation of concentrated water furnace, furnace water is too high alkalinity to produce sludge scale . As the scale thermal conductivity of only steel one-twentieth to one-tenth, poor thermal conductivity, first, resulting in a waste of energy, the second is excessive furnace fouling, over thick easily lead to overheating deformation of steel (tube), bulging