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一、前言东方锅炉厂401车间委托我公司改造该车间的1.624×2.088≈3.39m~2天然气室式加热炉。厂方要求将该炉的热效率由原来的5％提高到13％以上,生产率由1000kg/h提高到1200kg/h,把高压烧嘴(1～2kg/cm~2)改为低压烧嘴(300mm水柱左右),并要求炉体表面温度低(50℃左右),炉门口不喷火,操作简单方便。原来的炉子构造比较简陋,没有炉壳钢板及绝热保温层,炉门口过大,炉膛太高,烟道口布置、流通截面选配不合理,炉子配用的烧嘴是50年代的中高压的半喷射式烧嘴,老式辐射换热器,上排烟。因而该炉存在一般室式加热炉的共性问题,即:排烟温度高、
I. Introduction Dongfang Boiler Factory 401 workshop commissioned the transformation of the plant 1.624 × 2.088 ≈ 3.39m ~ 2 natural gas furnace room. The factory requires that the thermal efficiency of the furnace be raised from 5% to over 13%, the productivity will be increased from 1000kg / h to 1200kg / h, the high pressure burner (1-2kg / cm ~ 2) will be replaced by the low pressure burner Water column), and requires the furnace surface temperature is low (about 50 ℃), the furnace door does not flame, the operation is simple and convenient. The original furnace structure is relatively simple, there is no furnace shell steel and thermal insulation layer, the furnace door is too large, the furnace is too high, the flue opening layout, distribution section optional unreasonable, burner with burner is the 50’s medium and high pressure half Jet burner, the old radiation heat exchanger, exhaust smoke. Therefore, the furnace has the common room-type furnace common problems, namely: exhaust gas temperature is high,