多效蒸发成套设备
一公斤蒸汽冷凝释放出的热量和一公斤水蒸发需要吸取的热量,基本上是相同的,于是对单效蒸发而言,蒸发物料中一公斤水,需要消耗一公斤新蒸汽;如果把蒸发所得的二次蒸汽用作下一-效的加热蒸汽,则二效蒸汽、新蒸汽的耗量比之单效就节省了50%。效数增加,用汽减少,但设备的投资增加很多,所以一般不超过5效。
A kilo of steam condensation releases heat and a kilogram of water evaporation need to absorb heat, is basically the same, so the single efet evaporation, evaporation material by one kilo of water, need to consume a kilo of firesh steam; if the evaporation of the two steam is used as a effective heating steam, two. Steam, steam consumption than single effect saves 50%. The effect increases, steam to reduce equipment investment, but increased a lot, so is generally not more than 5.

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