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热加工车间,特别是钢铁厂的主厂房,在生产过程中都程度不同地散发出大量余热和各种有害物质。很多车间的散热量都大于0.2×10~5～4×10~5J/m~3·h,并且有害物质甚多。例如转炉车间加料时散发出大量石灰石和矿石粉尘,吹氧时冒出大量黑、白、黄及褐色烟气;均热炉和加热炉车间生产时散发含有SO_2的烟尘;热轧车间轧制时在生产线上有腐蚀性的灰尘和气体四溢,其中包括含氧化铁的粉尘、水蒸汽及油烟等;酸洗间也常有酸雾外溢等。若这些余热和有害物质不能迅速排出室外时,就必将恶化作业地带的操作条件,污染建筑空间的微小气候,加速
The thermal processing workshop, especially the main factory of the steel plant, emits a large amount of waste heat and various harmful substances in varying degrees during the production process. The heat dissipation in many plants is more than 0.2×10~5~4×10~5J/m~3·h, and there are many harmful substances. For example, a large amount of limestone and ore dust are emitted when the converter plant is charged, and a large amount of black, white, yellow, and brown fumes are emitted when oxygen is blown; fumes containing SO 2 are emitted during the production of the soaking furnace and heating furnace; In the production line, there are corrosive dust and gas overflows, including iron oxide dust, water vapor and soot, etc. Acid pickling rooms often have spills of acid mist. If these waste heat and harmful substances cannot be discharged outdoors quickly, they will deteriorate the operating conditions of the operation zone and pollute the microclimate of the building space, accelerating it.