Evaporator & Concentrator
Seven-effect falling film evaporator
Seven-effect falling film evaporator

Seven-effect falling film evaporator

A seven-effect falling film evaporator is a type of evaporator that uses a series of seven effects to evaporate a liquid The seven effects ar...

Product description


A seven-effect falling film evaporator is the best choice for an industrial application that requires the evaporation of a large volume of liquid. This type of evaporator can evaporate a more significant amount of liquid than a single-effect evaporator, and it does so with less energy consumption. In addition, a seven-effect evaporator can operate at a higher temperature than a single-effect evaporator, making it ideal for applications that require the evaporation of highly volatile liquids.

Seven-effect falling film evaporator

Scope of application

Suitable for all kinds of materials for evaporation and concentration, especially for materials that are not easy to scale, easy to evaporate, or have strong heat sensitivity.

System composition

It consists of an evaporator, separator, condenser, vacuum, and drainage system, each effect liquid, transfer pump, operation platform, electrical instrumentation control cabinet and valve, pipeline, and other methods.

Flow chart of falling film evaporator

Multi-effect evaporation and concentration equipment

The new steam enters the first effect as the heat source, and the secondary smoke produced is introduced into the second effect; by analogy, multiple evaporators are connected and operated together; that is, a multi-effect evaporation system is formed. In the multi-effect evaporation system, latent steam heat is reused, which can significantly reduce heat and energy consumption, greatly reduce energy consumption and improve thermal efficiency.

The use of standard evaporation and concentration equipment.

As the number of effects increases, the more economical steam consumption.

Although the investment cost of the equipment is small, the consumption of a large amount of steam and, therefore, a significant energy burden.

It is suitable for the concentration and evaporation crystallization in the case of low steam price.

Including falling film evaporator, forced falling film evaporator, heat transfer element including tube type, plate type, and two kinds of heat transfer structure.

Tube type falling film evaporation is to add the liquid from the heating room on the tube box of the falling film evaporator, evenly distributed to each heat exchanger tube by the liquid distributor, under the action of gravity and airflow into uniform film flow from the top to bottom, the flow process is heated and vaporized by the shell process heating medium, the steam generated. The liquid phase enters the separation chamber of the evaporator together, the smoke and liquid are fully separated, and the secondary steam and concentrated liquid are discharged, respectively.

The liquid flows downward by gravity through the liquid distributor on the upper part of the heater group and forms a liquid film on the outer surface of each plate.

Forced falling film evaporator is in the ordinary falling film evaporator to join the high flow circulation pump to improve the liquid film thickness and reduce fouling, reducing and preventing the "drywall" phenomenon.

Main features

●Small flow rate of the pump, small installed power, low power consumption.

The concentration ratio is large, and the concentration-time is short because of the falling film evaporation.

The unique design can be switched to change the efficiency by a simple operation to adapt to the production of different products.

●The top of the evaporator is sprayed with material or through multiple overflow film distribution devices to ensure uniform distribution of the material in the evaporator film tube, forming a film, significantly improving the heat transfer coefficient and increasing the evaporation rate, and preventing the phenomenon of "drywall."

After vapor-liquid separation at the bottom of the evaporator, the liquid enters the separator and separates again, strengthening the separation effect.

●The large equipment adopts the upright floor structure, and the whole set of equipment has a compact design, small floor space, and a simple layout, which represents the development of a large group of evaporation equipment.

●The equipment is equipped with a CIP cleaning pipeline, which can realize in-situ cleaning.


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