Wuxi Lima Chemical Machinery Co.,Ltd

    Wuxi Lima Chemical Machinery Co.,Ltd

    Address: No.558 Jinhui Rd., Wuxi, Jiangsu, China

    Contact: WangZhiYong

    TEL: 86-13255218018

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    Mobile phone:+86-13255218018



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Thin Film Evaporator Has Obvious Advantages And Is Widely Used In Many Industries

Wuxi Lima Chemical Machinery Co.,Ltd | Updated: Jul 05, 2017

Thin film evaporator is a type of evaporator, characterized by the material liquid along the heating tube wall membrane flow and heat transfer and evaporation, the advantages of high heat transfer efficiency, evaporation speed, material retention time is short, so particularly suitable for heat Evaporation of matter. According to the film formation and flow direction is different, can be divided into film evaporator, falling film evaporator, scraping film evaporator three types.

Thin film evaporator unit consists of evaporator, vapor-liquid separator, preheater three parts and a simple separator, the evaporator for the film-type tube heat exchanger. The evaporator has the characteristics of large production capacity, high efficiency, short heating time and so on. It is suitable for the dilute solution concentration in the pharmaceutical, food and chemical industries. The contact part of the equipment and the material is made of stainless steel, and has good corrosion resistance, Durable, in line with drug hygiene requirements.

Vacuum pressure drop:

Material vaporized gas from the heating surface to the external condenser, there is a certain pressure difference. In a typical evaporator, this pressure drop is usually relatively high, and sometimes even highly difficult to accept. The scraper thin film evaporator has a larger gas through the space, the pressure inside the evaporator can be seen as almost equal to the pressure in the condenser, so the pressure drop is very small, the vacuum up to 5mmHg.

Low operating temperature:

Due to the above characteristics, this allows the evaporation process to be maintained at higher vacuum conditions. As the vacuum increases, the corresponding boiling point of the material decreases rapidly, so the operation can be carried out at lower temperatures, reducing the thermal decomposition of the product.

Short heating time:

Due to the unique structure of the scraper thin film evaporator, the scraper has the pumping action, which makes the residence time of the material in the evaporator very short. In addition, the high speed turbulence of the film on the heated evaporator makes the product not Surface of the device. Therefore, it is particularly suitable for the evaporation of heat-sensitive materials.

High evaporation strength:

The decrease in the boiling point of the material increases the temperature difference between the same medium and the heat medium. The function of the doctor blade reduces the thickness of the liquid film in the turbulent state and reduces the thermal resistance. At the same time, in this process to inhibit the material in the heating surface of the wall, scaling, and accompanied by good heat exchange, thus improving the scraper film evaporator total heat transfer coefficient.

Operational flexibility:

It is due to the unique properties of the scraper thin film evaporator, making it suitable for heat treatment and the need for smooth evaporation, high viscosity and with the concentration increase the viscosity of the rapid increase in the material, the evaporation process can also be a smooth evaporation. It can also be successfully applied to solid particles, crystallization, polymerization, scaling and other materials evaporation and distillation.

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