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我区某炼油厂一台新锅炉正式运行16天,就发生过热器烧坏事故,16根管圈堵死,2根管子烧漏,被迫停炉检修,直接经济损失预计超过十五万元。1 锅炉简介锅炉额定蒸发量39t/h,工作压力3.82MPa。过热器分高、低温两级、垂直置于水平烟道中,过热蒸汽温度450℃,两级过热器中间布置面式减温器,低温过热器管圈48根,材料是Φ38×3.5的20g钢管,高温过热器管圈49根,材料是Φ38×3.5mm的15CrMo钢管,炉膛温度970℃,高温过热器出口烟温808℃,低温过热器出口烟温594℃。
A new boiler in a refinery in our district was officially put into operation for 16 days and a superheater burnout occurred. Sixteen loops were blocked and two tubes were burnt out. They were forced to shut down for overhaul. The direct economic loss was estimated to exceed 150,000 yuan . 1 boiler profile boiler rated evaporation 39t / h, working pressure 3.82MPa. Superheater sub-high and low temperature two, vertically placed in the horizontal flue, superheated steam temperature of 450 ℃, the middle of the two superheater surface desuperheater, low temperature superheater coil 48, the material is Φ38 × 3.5 20g steel , 49 high temperature superheater coil, material is Φ38 × 3.5mm 15CrMo steel, furnace temperature 970 ℃, high temperature superheater exit smoke temperature 808 ℃, low temperature superheater exit smoke temperature 594 ℃.