Falling film evaporation is to add the material liquid from the falling film evaporator heating chamber upper tube box，pass through Liquid distribution and film forming devices，Evenly distributed to each heat exchanger tube，Under the action of gravity and airflow，Flows from top to bottom as a homogenous film。in the process of flowing，Vaporization by shell-heating medium，The generated steam and liquid phase together enter the separation chamber of the Cifa separator.Thorough separation of vapor and liquid，Vapors are either condensed in the condenser (single effect operation) or into the next evaporator as heating medium，Enabling multi-effect operation，The liquid phase is discharged from the separator vessel.。

Falling film evaporatorThe material to be evaporated enters from the top of the falling film evaporator through the feed pump，Goes inside the evaporator tube (tube travel)，The material is distributed through a film distributor into the heat exchange tubes in a film-like form.The material is heated by the steam outside the tube as it flows down the tube by virtue of the gravitational force.，Evaporation after reaching evaporation temperature，The material, along with secondary steam, flows down inside the tubes and evaporates in the form of thin films.The secondary steam is compressed by a vapor compressor and then fed into the shell side of the falling film heating chamber as heating steam. Baffles within the shell side of the falling film heating chamber guide the secondary steam, facilitate condensation, and discharge non-condensable gases. During this process, the steam transfers its thermal energy through the tube walls from the shell side to the material evaporating inside the tubes. After heat exchange, the condensed steam (condensate) is drained out of the falling film evaporator。

purpose

Widely used in medicine, food, chemical industry, light industry and other industries of water or organic solvent solution evaporation and concentration of thick, and can be widely used in the above industry waste liquid treatment. Especially suitable for heat-sensitive materials, the equipment in a vacuum under low-temperature conditions for continuous operation with high evaporation capacity, energy saving, low operating costs, and can ensure that the material does not change in the evaporation process.。

hallmark

The material liquid of the falling film evaporator is added from the top of the evaporator, and it descends along the wall of the tube as a film under the action of gravity, and it evaporates and intensifies in the process, and the concentrated liquid is obtained at the bottom of the evaporator. The falling-film evaporator can evaporate the higher concentration, viscosity (for example, in 0.05~0.45Ns/m2 model domestic) material.

The falling film evaporator is suitable for the evaporation and concentration of foaming material, because the material liquid becomes film evaporation in the heating tube, that is to say, the formation of vapor-liquid separation, and at the same time in the bottom of the body of the effect, most of the material liquid that is pumped away, only a small portion of the material liquid and all the secondary Yan steam into the sub-commercial to strengthen the separation of the liquid liquid process does not form a great impact, avoiding the formation of bubbles.

Higher heat transfer coefficient due to film flow of solution in one-way type evaporator

Short residence time, not easy to cause material deterioration, suitable for processing heat-sensitive materials

Liquid retention is small, and the falling-film evaporator can take rapid operation in response to changes in energy supply, vacuum, feed volume, concentration, and so on.

Low-temperature evaporation can be used because the process fluid flows only by gravity and is not driven by high temperature differentials, the

Characteristics of system

• Lowest energy consumption and operation cost, electricity consumption of one ton water's evaporation is 2.2kw/℃.
• Temperature difference is small, heating is gentle, the loss of product is less.
• Compact structure and lower building cost; plant area is 50% less than that of traditional evaporator.
• Surrounding is friendly, no gas and no steam.
• Good adaptability in low loading condition, flexibility of operation is good and has a longer service life.
• Consumption of circular water is low and energy saving is obvious.
• No fresh steam is needed.
• Evaporation can be carried out under 40℃ and equipment need not to be frozen, specially suitable for thermal activity products.

Falling film evaporation is to add the material liquid from the falling film evaporator heating chamber upper tube box，pass through Liquid distribution and film forming devices，Evenly distributed to each heat exchanger tube，