在电厂,为了提高蒸汽品质或降低对锅炉饴水品质的要求。在锅炉的汽包中有时采用人为的分段蒸发。所谓分段蒸发即把汽包水容积分为几个独立的区段,各段的炉水浓度不同,蒸汽分别从炉水含盐浓度段低及较高的区段产生,污水从浓度较高的炉水中排出。如下图(1)为二段蒸发的原理图,其中水的流程:给水→第一段(循环蒸发)→第二段(浓缩循环蒸发)→排污。炉水浓度是按:给水→第一 In power plants, in order to improve the quality of steam or reduce the quality requirements of boil water. In boiler drums, artificial segmental evaporation is sometimes used. The so-called sub-evaporation that the drum water volume is divided into several independent sections, each section of different concentrations of water, steam from the furnace water salinity concentration of low and high section of the sewage from the higher concentration Of the furnace water discharge. The following diagram (1) for the schematic diagram of the second stage of evaporation, which water flow: water → the first paragraph (circulating evaporation) → the second paragraph (concentrated circulation evaporation) → sewage. Furnace water concentration is: water → first