What are the evaporation modes of vacuum rotary evaporator and thin film evaporator?

Both Vacuum rotary evaporator and thin film evaporator are kinds of evaporator.what are their differences and similarities in particular?firstly,let’s look at what vacuum rotary evaporator is and what thin film evaporator is.

Lanphan vacuum evaporator is a kind of evaporator widely used in laboratory and scientific research and is suitable for reflux operation ,concentration of trace components,fast distillation of large scale of solvents and reaction process requiring agitation.Lanphan vacuum evaporator system can seal and reduce pressure to 400-600mm.the solvent of the flask heated by heating bath,and the heating temperature can be close to the boilling point of the solvent.the flask rotary can make the solvent form a thin film to increase the evaporation area,in addition,the hat steam can be rapidly liquified and increase the evaporator rate under the action of the efficient cooler.the vacuum contains many glass components we should be careful during transport.

Detail of rotary evaporator
Detail of rotary evaporator

Thin film is also a kind of the evaporator .It is a method of forcing film formation by rotating the scraper to evaporate which has the advantage of high heat transfer  coefficient ,high evaporation intensity,short flow time and large operating flexibility,especially suitable for high viscosity material ,heat sensitive material and easily crystallized granular materials to desolvation,evaporation and concentration,distillation etc., so the thin film evaporator is widely used in chemistry,medicine,pesticideand other industries.

High efficiency rotary evaporator is a new type of high efficiency evaporation which can conduct falling film evaporation through forcing film formation by rotating the scraper.It has the advantage of high heat transfer coefficient,high evaporation intensity,short flow time and large operating flexibility,especially suitable for heat sensitive materials,high viscosity materials and easily crystalized granular materials to desolvation,evaporation and concentration,distillation etc., so the high efficient evaporator is widely used in chemistry,medicine,pesticide and other industries.

What’s the difference between vacuum evaporator and thin film evaporator?

From the perspective of evaporation process:The thin film evaporator material enters into the evaporator tangentially from the inlet at the lower end of the separation cylinder, the distributor is continuously and evenly distributed in the inner wall of the evaporation cylinder body and the secondary evaporation from the evaporation cylinder body rises to the separation cylinder and then the droplets or foam are removed by the foam catcher. The secondary steam leads to the thin film evaporator from the outlet at the upper end.The vacuum rotary evaporator USES the circulating water vacuum pump to pump the vacuum from the feeding port.After the material enters the rotating bottle, it is heated in a water bath. After the rotating bottle starts to work, the material inside the rotating bottle is heated and evaporates to the condensing pipe in a vacuum state. As the coil temperature inside the condensing pipe is low, the evaporated air immediately liquefies and falls to the collection bottle.

From the perspective of the drive mode: film evaporator rotor drive is the form of motor,reducer,scraper determine the rotor speed. The turbine and worm of vacuum rotary evaporator are driven by motor deceleration and equipped with high strength nylon wheels so that the operation is smooth and the noise is small.

rotary evaporator
rotary evaporator

Rotary Evaporator set

The Thin Film evaporator has the following features:

1.high heat transfer coefficient,high evaporation intensity,and can be up to 50~300kg/m2.h for water and organic solvent(viscosity less than 100cp).

2.low temperature evaporation:because the thin film evaporator conducted in vacuum,the required vacuum degree is determined by the nature of the evaporating material,and greatly decrease the boiling point of processed materials.so it’s especially suitable for the low temperature concentration of the heat sensitive materials.The concentration of a strong [wiki] corrosive [/wiki] medium can also be treated with a common material.

3.short residence time:the material stays in the equipment for a short time ranging from a few seconds to dozens of seconds.the residence time varies with the dip Angle of the groove on the end face of the board.  Under the push action of the hanging board, the material spirals down in the device and leaves the heating cylinder. The material is extruded and the residence time is shortened, which can reduce the decomposition or polymerization of the product in the evaporation process and improve the recovery rate of the solvent.

4.Energy saving:Due to the use of vacuum operation,the boiling point of the material is decreased,the low-grade steam can be used to save energy under the promise of same temperature difference.Especially suitable for multi-effect evaporation of the end effect of evaporation.  5.Easy to operate and maintenance;As the rotor system has a good mixing effect on evaporating materials, the surface of the equipment has the minimum surface scaling, which can deal with the medium with high viscosity, containing particles, heat sensitivity and easy to crystallize.

Lanphan has always adhering to the management idea of “loyalty,responsibility,professional,honor”,service customers and inspire all Lanphan people unit as one,wisdom, and achieves the common enterprise, our products are exported to Belgium vacuum rotary evaporator, the United States, Iran, Turkey, Poland, Vietnam, India and other countries and regions.Lanfan people will be more quality and efficient service back to customers around the world!To make an inquiry, please call 0371-67447999.

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