Mother liquor evaporation system

Abstract

The present invention discloses a mother liquor evaporation system with good evaporation effect, high production efficiency and low energy consumption. The mother liquor evaporation system comprises evaporators which are composed of a tank and a heat exchanger provided in the tank, an evaporation system is composed of the evaporators, the evaporation system is a multi-effect evaporation system constituted by a plurality of evaporators, in the evaporators of the multi-effect evaporation system, an outlet of the tank of the front evaporator tank is connected to an inlet of the heat exchanger of the rear evaporator; steam passes through the heat exchanger, the one effect evaporator introduces steam for once, the subsequent evaporators successively introduce secondary steam which can be taken as a heat exchange medium.

Description

technical field [0001] The invention relates to an ammonium chloride production device. In particular, it relates to a mother liquor evaporation system. Background technique [0002] In the existing ammonium chloride production process, the mother liquor evaporation of ammonium chloride usually adopts an evaporator with a tube-and-tube heat exchanger inside to evaporate the mother liquor at one time. The tube heat exchanger passes through the tube, and performs isolated heat exchange with the hot water or steam outside the tube heat exchanger and the inner chamber of the evaporator tank, and the mother liquor after passing through the evaporator directly enters the next process. The biggest defect of this evaporation process is that the tube-and-tube heat exchanger in the evaporator is easily blocked by mother liquor crystallization. In case of mild blockage, it needs to be flushed and dredged with steam. When serious blockage occurs, only through Dismantling the evaporato...

AI Technical Summary

Problems solved by technology

The biggest defect of this evaporation process is that the tube-and-tube heat exchanger in the evaporator is easily blocked by mother liquor crystallization. In case of mild blockage, it needs to be flushed and dredged with steam. When serious blockage occurs, only through Dismantling the evaporator to clear the blockage will not only affect the evaporation effect but also affect the production efficiency of the evaporation process, and increase unnecessary energy consumption; if the evaporation system with this structure constitutes a multi-stage evaporation, the above defects will become more prominent, so that Unable to carry out normal production

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