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我对某单位一台DZG1-8型锅炉进行内部检验时发现:前后管板水垢厚约4mm,烟管上水垢厚约4mm并有轻微点腐蚀,锅筒内壁和水冷壁管上水垢厚约3mm。这些部位的水垢有的和金属仍结合在一起,有的已剥离翘起,亦有的脱落夹在烟管的间隙中,锅筒底部堆积垢片和垢渣厚70mm,集箱内堆积垢渣厚80mm。在炉膛内进行检验时发现:锅炉左侧水冷壁管前数第8根、9根明显胀粗,第10根胀粗产生裂纹,第6根、7根已明显过烧,这些水冷壁管都已被水垢堵死。经调查,该单位于检验前三个月对该锅炉进行碱洗
When I conducted an internal inspection on a DZG1-8 boiler of a certain unit, I found that the thickness of the scale on the front and the back of the tube plate was about 4mm, the scale on the smoke tube was about 4mm thick and slightly corroded, and the scale on the inner wall of the drum and the water- . Some of these parts of the scale and the metal is still together, and some have peel off tilt, and some fall caught in the gap between the smoke pipe, the bottom of the drum scale and dirt scale deposition slag thickness 70mm, the accumulation of slag inside the header Thick 80mm. Inspection in the furnace found that: the first left of the boiler water wall tube number of the first eight, nine were significantly expanded, the first ten thick bulge cracked, the first six, seven have been over-burning, these water-wall tubes are Has been blocked by scale. After investigation, the unit in the first three months of inspection on the boiler caustic washing