Introduction to the process of low temperature concentration + evaporation and crystallisation of centrifuged salt

Introduction to the process of low temperature concentration + evaporation and crystallisation of centrifuged salt:

The previous section describes how the brine is concentrated by low temperature evaporation to near saturation concentration (25-29%) and discharged to the next process. This article continues with the subsequent treatment process of the crystallised effluent salt. The highly concentrated brine enters a forced circulation evaporator after heat exchange and is heated with raw steam for evaporation, with the resulting secondary steam used as the heat source for low temperature evaporation. As evaporation proceeds, the concentration of salt in the waste water becomes higher and higher, and when it exceeds saturation, the salt precipitates out continuously, and after treatment, the solid sodium chloride is packaged and sold.
In the salt crystallisation plant, our team uses a number of innovative technologies, such as the use of self-cleaning devices to effectively remove scaling and the adhesion of organic matter and salt to the inner walls of the plant, the installation of a rotating foam trap in the upper part of the evaporation chamber to reduce the phenomenon of salt carried by droplets, and the installation of a deflector plate in the salt sludge tank to promote the growth of crystal salt and improve product quality, which has resulted in improved product quality and continuous operation of the plant These innovations have improved the quality of the product and the continuous operation of the plant, reduced the labour intensity of the workers and lowered the overall operating costs.
The low temperature concentration + evaporation and crystallisation process is very suitable for plants without low grade heat source, firstly, the low concentration salt-containing wastewater is concentrated to a higher concentration, then it enters the evaporation and crystallisation system to evaporate and crystallise, using the secondary steam generated by the evaporation and crystallisation device as the heat source for low temperature concentration, making full use of the heat energy of each link and minimising energy consumption. Evaporation of one ton of fresh water consumes only 200kg of raw steam and 15 degrees of electricity, far lower than the consumption of traditional evaporation and crystallisation.