triple effect evaporator

1、 Scope of application

The three effect evaporator 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).
Considering the characteristics and complexity of various solutions in different factories, our company will provide specific technical solutions for the composition and content of solutions with crystal precipitation provided by users for their reference and selection!

2、 Working principle

Triple effect evaporation refers to the evaporation operation of several evaporators running in series, which enables multiple utilization of steam heat energy and improves the utilization rate of heat energy. It is commonly used for the treatment of aqueous solutions. In the process of triple effect evaporation, the first evaporator (referred to as the first effect) uses steam as heating steam, while the other evaporators (referred to as the second and third effects) use the secondary steam from their previous effect as heating steam, thereby significantly reducing the amount of steam used.
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 three heaters, three forced circulation pumps, three evaporation separators, crystallizers, condensers, centrifuges, various material pumps, condensate pumps, vacuum pumps, operating platforms, electrical instrument control cabinets, and internal pipeline valves.

4、 Main features

According 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.
2. Adopting a uniquely designed crystallizer, it can meet the process requirements of continuous feeding and discharging. The forced circulation of the evaporator forms a better coordination, and its internal structure enables effective and rapid separation of crystals and clear liquid.
3. The entire process involves evaporation under vacuum conditions, with relatively low temperature, fast evaporation rate, low energy consumption, and high evaporation concentration. This makes the viscous liquid easy to flow and evaporate, and less prone to scaling. It is currently one of the better evaporation equipment that combines evaporation and crystallization.

5、 Technical parameters

Specification/Model	single effect	double-effect	Three Way	quadruple effect	Five effects
Evaporation rate (Kg/h)	300-2000	1200-4000	3000-15000	8000-50000	10000-100000
Feed concentration%	Based on the customer's materials
Discharge concentration%	Based on the customer's materials
Steam pressure (Mp)	≥0.3
Steam consumption/evaporation (with heat pump)	0.65	0.38	0.28	0.23	0.19
Cooling water consumption/evaporation (inlet water at 20 ℃ and outlet water at 40 ℃)	28	11	8	7	6
Evaporation temperature (℃)	45-90
Note: In addition to the specifications of the table series, it can also be designed separately according to customer requirements.