Evaporation Equipment

What are the different types of evaporators?
  • Rotary Evaporator
  • Falling-film evaporator
  • Rising Film Evaporator – Long-tube vertical evaporator
  • Single effect external circulation evaporator
  • Thin Effect Evaporator
  • Open kettle or pan
  • Forced-circulation evaporator
  • Agitated film evaporator
  • Open pan solar evaporator
  • Horizontal-tube natural circulation evaporator
  • Vertical-tube natural circulation evaporator
How an Evaporator Works?

The working principle of the evaporator is to use the method of evaporation to vaporize and remove part of the solvent after heating the solution, thereby increasing the concentration of the solution, that is, the process of concentration of the solution. The equipment that performs the evaporation operation is called an evaporator. The basic parts of an evaporator usually consists of a heat exchanger, a vacuum pump, a vapor separator and a condenser.

What is difference between evaporator and condenser?


Evaporator absorbs heat; condenser discharges heat


The evaporator is mainly composed of a heating chamber and an evaporation chamber. The heating chamber provides the liquid with the heat required for evaporation, so that the liquid is boiled and vaporized; the evaporation chamber is the part that separates the gas and the liquid.

The condenser is a component of the refrigeration system; it is also a component of the entire evaporator system.


The evaporator uses the principle of heating to heat the solution containing different substances to boiling, so that part of the solvent is vaporized and removed.

The condenser is mainly used to discharge heat, it can convert gas or vapor into liquid. During the evaporation process, the device that converts the vapor into a liquid state is called a condenser.

Rotary Evaporator

A rotary evaporator, also known as rotovap, is a common and essential equipment for concentration, crystallization, drying, separation and solvent recovery in pharmaceutical, chemical and bio-pharmaceutical fields and other fields.

A rotary evaporator usually consists of several parts, including a motor unit, a vacuum system, a water or oil bath for heating, a rotating flask, a receiving flask, condenser pipes and other components.

The basic working process can be described below. The rotating flask is heated thermostatically and can rotate at a constant speed. Then the material forms a large area of thin film on the inner surface of the flask. The solvent vapor is recycled in the collecting bottle after being cooled by high-efficiency glass condenser, which greatly improves the evaporation efficiency.

A rotary evaporator is especially suitable for the concentration and purification of biological products which are easy to decompose and denature at high temperature. It features better security, higher evaporation efficiency, and more convenient operation.

Rotary Evaporator for Sale

Falling Film Evaporator

A falling film evaporator is an essential evaporation equipment, which is applicable for the evaporation and concentration of the foaming material.

A falling film evaporator system mainly consists of several parts. The first part is the evaporator (the heat exchanger), which is used to heat and evaporate liquid materials. The second part is the separator, mainly used to separate the concentrated liquid and the secondary steam generated after heating. The third part is the preheater, which is used to preheat liquid materials entering the steam and cool the secondary steam in order to recycle and utilize it. The fourth part is the condenser, whose function is to condense the secondary steam so that it can be recycled and utilized. The fifth part is the condensate tank, which is connected to the pump at the outlet and capable of discharging condensate liquid automatically.

As the high efficient evaporation equipment, it’s widely used in a great number of fields, such as the pharmaceutical, food, chemical, light fields and other fields for the evaporation and concentration of water and organic solvents. And it’s especially suitable for the evaporation and concentration of thermal sensitive materials.

It can operate continuously under the conditions of vacuum and low temperature, featuring the high evaporation efficiency, energy conservation and low operating cost. As well, materials can be ensured not to change easily during the evaporation.

Falling Film Evaporator for Sale

falling film evaporator

falling film evaporator for sale

Single-Effect Falling Film Evaporator

A single-effect falling film evaporator is one of the types of falling film evaporator. It’s applicable for the evaporation of liquid at a low temperature in many industries, such as food, chemical engineering and medicine. A single-effect falling film evaporator mainly consists of the feeding pump, the evaporation and separation chambers, condensers, the heating pipe, the ethanol collection tank, the discharging pump, the vacuum pump and other components. And the parts exposed to materials, the secondary steam and the condensate are all made of high-quality stainless steel, possessing excellent corrosion resistance. In its working process, the materials are evenly distributed into each falling film pipe through the distributor, and flow down the wall of the pipe in the state of a liquid film. Under the action of gravity and the secondary steam flow, the materials get evaporated while flowing down. At the bottom of the falling film tube, the materials and secondary steam are basically separated, and they reach the separation chamber to achieve complete separation.

Single-Effect Falling Film Evaporator for Sale

Rising Film Evaporator – Long-tube Vertical Evaporator

Rising film evaporator is also know as vertical long tube evaporator, rising tube evaporator.

Rising film evaporators are suitable for dilute solutions with low concentration and heat-sensitive materials.

The solution is preheated to the boiling point, added from the bottom of the heating chamber, and strongly vaporized in the heating tube. The generated vapor drives the liquid to rise in the form of a film along the pipe wall. The liquid film continues to evaporate as it rises. The solution can reach the required concentration through the heating tube.

rising film evaporator

Rising Film Evaporator for Sale

Single Effect External Circulation Evaporator

The single-effect external circulation evaporator completes most of the gas-liquid separation in the separation chamber.

The single-effect external circulation evaporator is a device that uses negative pressure to heat the material to make the material liquid boil, remove the vaporized part, and concentrate the material liquid. The equipment has a wide range of applications in many fields such as biopharmaceuticals, health foods, daily chemicals, flavors and fragrances.

single effect external circulation evaporator

Single Effect External Circulation Evaporator

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