Multi Effect Falling / Thin Film Evaporator 1600lph Vacuum Crystallization Equipment For Wastewater

Multiple Effect Evaporation

Multiple Results One of the most often utilized techniques for concentrating aqueous solutions is still evaporation.

The quantity of effects has a major impact on how economically efficient an evaporator system is.

We can improve the efficiency of an evaporator system by increasing the number of impacts.

The effect to which raw steam is fed is the first effect of a multiple effect evaporator.

The vapors produced by the initial action serve as the heating medium for a subsequent effect.

TVR or MVR is used in Multiple Effect Evaporators to use the dead vapors.

For an evaporator maximum boiling temp is 80℃ in first stage and 40℃ in the last.

Material process

(1) The raw material is delivered to the front primary preheater by the feed pump through the electromagnetic flowmeter, and then enters the top of the primary effect heater through the liquid distributor for primary falling film evaporation and concentration;

(2) The first effect concentrated liquid is transported to the top distributor of the second effect heater by the first effect bottom material circulating pump for secondary falling film evaporation concentration.

(3)For the third time of dropping film evaporation concentration, the second effect bottom material circulating pump transports the second effect concentrated liquid to the top distributor of the third effect heater;

(4) Second effect concentrated liquid discharge, according to the online detection of the hydrometer, real-time detection of the material concentration, it will be connected with the discharge valve to open the discharge valve and transport the material to the finished product tank, if the material concentration meets the set requirements, otherwise, it will open the material circulation valve to make the material recycle into the evaporator again for re-evaporation.

Steam process

For heating evaporation concentration, raw steam is introduced into the primary effect heater. The secondary steam produced by the primary effect then heats the secondary effect, and so on. The condensate pump removes the condensate water after the secondary steam produced by the third action enters the end condenser for condensation cooling.

Condensate process

The condensate water produced by the primary effect preheating the materials through the water transfer pipe at the bottom of the shell, to save the consumption of raw steam;

The condensate water produced by the secondary and third effect is discharged by the condensate pump, and the discharge has reached zero pollution. The non condensing gas is connected to the end condenser by the non condensing gas pipe and discharged by the vacuum pump.

Characteristic

1. Evaporation capacity: From 500Kg/h to 80T/h
2. Material: Stainless steel 304 or Stainless steel 316L;
3. Full closed process, fast and low temperature evaporation;
4. Inside pipes are mirror polishing seamless sanitary pipes, so material is not easy to paste on the pipe. It's easy for cleaning;
5. Low steam consumption: 1kg steam can evaporate 3.5-4 kg water;
6. Low evaporation temperature:part of secondary steam can be inhaled into single-effect heater through spray type hot pressure pump. This would make full use of the heat and the evaporation temperature is low.
7. Large concentration ratio: adopt falling film evaporation, which make the material liquid with larger viscosity be easy to flow and evaporate, hard to scale, short concentration time, the concentration ratio can reach to 1:5.
8. This equipment can realize automatic production, intellectual system management, which is in conformity with GMP standard.
9. Can be designed into different technological process according to the different characteristics of the materials and different users' requirements.

Typical three effect falling film evaporator specifications and technical parameters:

Working principle chart

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