Evaporation Equipment

What are the Types of Evaporation?

  As one of the two forms of vaporization, evaporation is a process by which a liquid turns into a gas or vapor below its boiling point. And it occurs on the surface of the liquid. There are several factors influencing the evaporation rate, such as temperature, humidity, the surface area of the liquid and other elements.

What equipment is used for evaporation?

  It’s well known that evaporation is a process by which a liquid turns into a gas or vapor below its boiling point occurring on the surface of the liquid. The equipment used for evaporation is called evaporators. The basic parts of an evaporator usually consists of a heat exchanger, a vacuum pump, a vapor separator and 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.

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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.

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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.

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