Wastewater crystallization evaporator

1、 Scope of application

There are various types of wastewater with ever-changing characteristics and diverse treatment methods. Our company's sewage or wastewater treatment method is based on the characteristics of the material liquid, using either ① multi effect evaporation process or ② multi effect evaporation+Drying process or ③ multi effect evaporation+Crystallization process is used to treat sewage or wastewater, so that the water separated by evaporation meets the national discharge standards, and the moisture content of the dry matter after evaporation is lower than20%The challenge of sewage and wastewater treatment is to ensure that the treated water meets the national discharge standards while reducing treatment costs.
We can propose a comprehensive performance optimization process plan based on the specific parameters of the sewage or wastewater provided by the user, which can achieve both standard drainage and good economic efficiency, and manufacture equipment that satisfies the user.
This device is mainly suitable for the evaporation and crystallization of solutions with crystal precipitation, and is widely used in the chemical industry, metal mining smelting, acid washing waste liquid of large steel mills, wet desulfurization waste liquid treatment of power plants, etc(Sodium chloride, phenylpropanoic acid, sodium sulfate, ammonium chloride, glycine; Barium chloride, zinc sulfate, calcium chloride, ammonium sulfate, sodium hydroxide).

2、 Working principle

The material liquid is heated by the steam outside the heat exchange tube in the heater, resulting in an increase in temperature. Under the action of the circulation pump, the material rises into the evaporation separator. Due to the decrease in static pressure of the material, it evaporates, producing secondary steam that overflows from the material liquid. The material is concentrated and becomes supersaturated, causing crystal growth. The material that is released from supersaturation enters the forced circulation pump and, under the action of the circulation pump, enters the heat exchanger. The material continues to evaporate and crystallize in a cyclic manner, achieving separation between substances and purifying chemical substances and obtaining chemical products.

3、 Equipment composition

This equipment consists of a heater, forced circulation pump, evaporator separator, crystallizer, condenser, various material pumps, condensate pump, vacuum pump, operating platform, electrical instrument control cabinet, and internal pipeline valves.

4、 Main features

1According to the characteristics of the material and the size of the evaporation capacity, it can be designed as a single effect or multi effect evaporation unit.
2Adopting a uniquely designed crystallizer, it can meet the process requirements of continuous feeding and discharging. The forced circulation of the evaporator forms the best fit, and its internal structure enables effective and rapid separation of crystals and clear liquid.
3The entire process involves evaporation under vacuum conditions, with relatively low temperature, fast evaporation rate, low energy consumption, and high evaporation concentration. This makes it easy for viscous liquids to flow and evaporate, without scaling. It is currently one of the most advanced evaporation equipment combining evaporation and crystallization internationally.