Falling Film Evaporator

Product features and description

Falling Film Evaporators offer distinct operating advantages in the concentration of many materials, such as certain food products, fruit juices, pharmaceuticals and similar materials, which are particularly suited to evaporation in this type of equipment.

Our Falling Film Evaporators are unique in that they utilize novel operating principle from other types. The dilute liquid is fed to the top of the tubes, flows downward as evaporation occurs.

Uniform distribution of the liquid to the tubes is assured by an exclusive feature which controls the flow of the liquid to the top of the vertical heating tubes. The liquid flows over the edge of the tubes and runs down the inside surface in a thin, uniform film. The vapor travels down the tubes in the same direction as the liquid, gaining in velocity by the addition of more vapor as the mixture descends, resulting in high velocity for both the liquid and vapor.



Product features and description


It's applicable for dairy products, beverage,pharmacy, glucose, starch,chemical industry, xylose, citric acid, ammonium sulfate, biological engineering, environmental engineering and waste liquid recovery and treatement. etc.

Equipment structure:

It consists of (first-effect, second-effect, third-effect)separators and evaporators and preheaters,condenser and vaccum pump, feeding pump, circulation pump, discharge pump, condensed water pump and system pipe fittings, etc. Equiped wit CIP spraying cleaning ball, vacuum gauge, thermometer,pressure gauge,and so on.

The equipment features are as follows:

1.Continuous feeding and discharging, the system is stable and easy to operate. When working in this series of equipment, it only needs to adjust various parameters as required at the initial feeding stage, and at the same time ensure continuous and stable supply of materials, convenient adjustment, continuous and stable concentration and high efficiency, and can recover the solvent at the same time.

2.The concentration ratio is significant (up to 1:5), thermal efficiency is high, and the energy saving effect is remarkable. In the structure of the system, we adopt an optimized design scheme to achieve the evaporation heat transfer coefficient 3400-3800w (m2·K), which is very suitable and advantageous for the concentration of Chinese herbal extracts. The main reason is that the material flows rapidly in the form of a film in the heating tube, and the heating temperature difference is small (only 8-10 ° C), the evaporation temperature is low, and the material can form a rapid flash after entering the evaporator. The residence time and heating time of the chemical liquid in the heating tube are short, and the viscosity of the material is wide (50-500 cp). It is not easy to crystallize and coke out due to heat, and the damage to the active ingredient is small, the heat energy is utilized sufficiently, and the energy saving effect is remarkable.

3.Easy to use advanced control methods. Because the LJN series concentrating process mainly uses the temperature of each effect as the control parameter, the parameters of the system are stable during operation, and it is easy to adopt advanced automatic control (PLC and human-machine interface control), and the control equipment cost is relatively low, for the production of traditional Chinese medicine. Achieve greater automatic control with greater convenience.

4.The structure design is advanced and reasonable. In terms of structure, we adopt an optimized design scheme. I use advanced liquid distribution device to distribute the liquid in the pipe during the feeding, so that the material can enter the heating pipes evenly. At the same time, the inner wall mirror with high quality imported is selected. The tube is used as a heating tube, so that the flow resistance of the material in the tube is small, the speed is fast, and the scale is not easily precipitated. In order to improve the yield of concentration, the system is equipped with an advanced mist trap to eliminate the ability of entrainment of the mist, the separation efficiency can reach 96-99%, and the resistance drop is small.

5.Low steam consumption: 1kg steam can evaporte 3.5kg water.

6.Low evaporation temperature:part of secondary steam can be inhaled into single-effect heater through spray type hot pressure pump, this would make full use of the heat and the evaporation temperature is low.

Technical parameter

Vacuum degree(MPa) Evaporation temperature(℃ )
Single effect 0.048-0.057 80-85
Dual effect 0.031-0.038 70-75
Three effect 0.019-0.025 60-65
Specification / Model UN500 UN1000 UN1500 UN2000 UN3000 UN5000 UN6000 UN8000
Evaporation 500 1000 1500 2000 3000 5000 6000 8000
Steam pressure(Mpa) 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.25 0.1-0.25
Steam consumption(kg/h) 185 370 555 740 1110 1850 2220 2960
Circulating water consumption(T/h) 5 10 13 15 18 25 30 40
Lx W x H
7080x900x3500 7680x1000x4000 8380x1100x4600 8890x1100x4600 9500x1300x4900 10200x1400x5300 10800x1500x5800 11500x1600x5800

Example Parameter:

No Item Specifications
1 Feed Liquid Sodium chloride
2 Water Evaporation Flow 800 kg/h
3 Feed 20-25% 1000 kg/h
4 Discharge 55% 520 kg/h(Crystal 200kg/h)
5 Working Vapor Pressure 0.3-0.5Mpa
6 Working Vapor Consumption 330 kg/h
7 Cooling water volume 37 T/H (Inlet water: 32ºC, Outlet water:38ºC)
8 Total Power 50.4 KW (Cooling water pump is not included)
9 Total Weight 12Tons
10 Material Touch face TA2,other 316, pump2205
L Dimensions 7000×3000×8500MM

Cooperation with the customer

Company Profile

JNBAN vacuum belt dryers have been included in the“ Eleventh Five-Year National Science and Technology Support Program, Zhejiang Science and Technology Department Major Science and Technology Public Relations Project and Zhejiang Province” Major Science and Technology Special (Priority Theme) Social Development Project. There are 4 papers and 6 patent applications accepted, including 4 invention patents, 2 special authorizations, and 10 practical patents. They won the third prize of Zhejiang Science and Technology Progress Award and the first set of products in Zhejiang Province.……

Pre-sale and after-sale service commitment

Technical service plan within warranty period

Wenzhou Jinbang Light Industry Machinery Co., Ltd. is a high-tech enterprise integrating R & D, manufacturing and sales. Professional in the production and sales of pharmaceutical, bioengineering machinery and equipment professional enterprises. The company mainly specializes in consulting, scheme design and manufacturing, budget, on-site installation and after-sale maintenance of traditional Chinese medicine extraction equipment, concentration equipment, separation and purification equipment, alcohol recovery equipment and drying equipment.……

Contact us

Wenzhou Jinbang Light Ind Machinery Co., Ltd


P.C: 325025

Address: No. 420 Binhai 23rd Road, Binhai Park, Economic & Technological Development Zone, Wenzhou, Zhejiang, China

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