Industrial hinge-bladed Wiped Film Evaporator

Wuxi Hongdinghua Chemical Equipment Co.,Ltd warmly welcome you to Industrial hinge-bladed Wiped Film Evaporator from our factory. We will provide you with good service and factory discounted. Among the wiped film evaporators designed and manufactured by Wuxi Hongdinghua Chemical Equipment Co., Ltd. for customers, the hinge-bladed wiped film evaporator is a common type and has a wide range of industrial applications. Hinge-bladed wiped film evaporators are often used for materials that are prone to scaling on the heating surface, contain solid particles, or have a tendency to crystallize during the evaporation process, and require concentration into dry materials.

Working Principle of Hinge-bladed wiped Film Evaporator

Hinge-bladed wiped film evaporator is an efficient evaporator that raw material is forced to form a film by rotating blades at a certain angle to the heating surface those are connected to independent rotating shafts, and flows at high speed. It has high heat transfer efficiency, short retention time, and can perform falling film evaporation under vacuum conditions.

The hinge-bladed wiped film evaporator is also composed of one or more cylindrical bodies with jacket heating and a rotating film wiping device inside the cylinder. The independent hinge connected blades continuously wipe the material entering the hinge-bladed wiped film evaporator into liquid film with even thickness and uniform velocity on the heating surface and moves downwards; During this process, the low boiling point components are evaporated, and the residue is discharged from the bottom of the evaporator.

Characteristics and application of hinge-bladed wiped film evaporator

The structural characteristics of hinge-bladed wiped film evaporator are as follows:

1. Motor and reducer: Drive device for rotor rotation.

2. Vapor liquid separation chamber: materials enter the hinge-bladed wiped film evaporator tangentially through the inlet at the lower part of the vapor liquid separation chamber, and are continuously and evenly distributed on the wall of the evaporation chamber of the hinge-bladed wiped film evaporator through the liquid distributor at the lower part of the vapor liquid separation cylinder chamber. The secondary steam evaporated from the evaporation chamber rises to the separation chamber at the upper part of the hinge-bladed wiped film evaporator, and is separated from the liquid drops or foam that may be carried by the secondary steam through the gas-liquid separator installed in the vapor liquid separation chamber, The secondary steam is exhausted out of the hinge-bladed wiped film evaporator from the outlet at the upper end.

3. Liquid distributor: Installed on the rotor, the material enters the hinge-bladed wiped film evaporator from the tangential direction, and is continuously and evenly distributed in a film shape on the evaporation surface through the rotating liquid distributor.

4. Gas liquid separator: the gas liquid separator is installed upper part of the separation chamber, which traps the liquid drops or foam that may be carried by the rising secondary steam and makes it fall back to the evaporation surface.

5. Evaporation chamber: The inner wall of the evaporation chamber is the evaporation surface where it exchanges heat with the materials forced to form a film by the rotating blades and the heating medium inside the jacket.

6. Rotor: The rotor is composed of a rotating shaft and a rotating frame. The rotor is driven by an electric motor and a reducer, and drives the blades to move in a circular motion. Its strength, geometric dimensions, and stability must be guaranteed.

7.Blade: The blade moves in a circular motion, continuously wiping the liquid material onto the evaporation surface to form a thin film, in order to achieve the effect of thin film evaporation.

hinged blade for hinge-bladed wiped film evaporator

The hinge connected blade has a central rotating shaft that drives the hinged blade, which slides at a certain angle against the heated wall surface by centrifugal force.

8. The bottom head is equipped with high-temperature resistant self-lubricating bearings, the bottom bearing should be convenient for material discharge and maintenance and repairing.

The operating performance characteristics of hinge-bladed wiped film evaporator are as follows:

1. Minimal pressure loss

The raw material In a hinge-bladed wiped film evaporator "flow" and the secondary steam "flow" are in two independent "channels":The material falls along the wall of the evaporation chamber and descends; The secondary steam leaves the evaporator almost unobstructed from the central of the cylinder, so the pressure loss is minimal.

2. Capable of operating under true vacuum conditions

Due to the extremely small resistance of the secondary steam from the evaporation surface to the condenser, it can maintain a high vacuum degree on the evaporation surface of the entire evaporation chamber wall. The Vacuum degree improvement effectively reduces the boiling point of the processed material.

3. High heat transfer coefficient, high evaporation intensity

The decrease in the boiling point of the material increases the temperature difference with the hot medium; The turbulent liquid film reduces thermal resistance; Similarly, the coking and scaling of materials on the wall are inhibited, and the partial heat transfer coefficient of the evaporation cylinder wall is also improved; Therefore, its evaporation intensity is very high.

4. Low-temperature evaporation

Due to the ability to maintain a high vacuum inside the evaporation cylinder, the boiling point of the treated material is greatly reduced, making it particularly suitable for low-temperature evaporation of heat sensitive materials.

5. Short flow time

The flow time of the material in the evaporator is very short, effectively preventing the decomposition, aggregation, or deterioration of the product during the evaporation process.

6. Low grade steam can be utilized

Steam is a commonly used thermal medium. By reducing the boiling point of materials and ensuring the same temperature difference, the temperature of the heating medium can be reduced. Utilizing low-grade steam is beneficial for the utilization of energy. Especially suitable as a final effect evaporator for multi effect evaporation.

7. Strong adaptability and easy operation

The structure of centrifugal wiped film evaporator is specialized.hinge-bladed wiped film evaporator can be used to handle high viscosity, particle content, thermal sensitivity that are difficult to handle by conventional evaporators.

A material that is prone to crystallization. The design of the hinge connected blades provides effective compression force (high evaporation ratio and low residual liquid) for the liquid film.

The centrifugal wiped evaporator manufactured by HDH is widely recognized and accepted, and the hinge-bladed wiped film evaporator designed and manufactured by HDH can be suitable for various needs:

1. Distillation

2. Concentration

3. Degassing

4. Bleaching

5. Deodorization

6. Drying

7. Reaction

8. Crystallization (exerting the cooling function of the evaporator)

9. Recycling (especially solvents or other useful substances used in the pharmaceutical industry)

10. Purification (such as seawater desalination, separation of pure solution substances)

Hinge-bladed wiped film evaporator details

Hinge-bladed wiped film evaporator is a type of wiped film evaporator, and its structural characteristics include:

Hinge-bladed wiped film evaporator , each blade has a central rotating shaft, which drives the blade through a connecting rod mechanism. The hinged blade is tightly attached to the heating wall surface by centrifugal force and slides at a certain angle to wipe the raw material into the required liquid film and prevent scaling and coking on the heating surface. This type of design allows the blade to provide effective pressure on the liquid film, improve the high evaporation ratio of the material ,also it can help to reduce the residue of the material. It is suitable for materials that are prone to scaling on the heating surface, contain solid particles, or have a tendency to crystallize during the evaporation process, and require concentration into dry materials, with a processing viscosity of 35000 mpas.

This type of rotor is widely used by changing the frequency and mass of the scraper and adjusting the centrifugal force. The blade material is usually the same metal material as the evaporator cylinder, and PTFE material can also be used.

Wuxi Hongdinghua Chemical Equipment Co., Ltd. needs to comprehensively consider the following factors when assisting customers in selecting hinge-bladed wiped film evaporators:

1. Production capacity and operating parameters:

Including processing capacity: ________

Feed concentration: ________

Discharge concentration: ________

Feed temperature: ________

Discharge temperature: ________

Operation duration: ________

2. Material characteristics:

Material thermal sensitivity:________

Material viscosity:________

Material flowability at operating temperature:________

Material foaming property:________

Solid content of material Material crystallization tendency:________

Material coking tendency:________

Is the material prone to aggregation

2. Operating medium (heat source):

Water vapor: ________(pressure)

Cooling water temperature: ________℃

Cleaning solution (solvent):________

3. Material selection for manufacturing:

Surface polishing requirements:________

4. Site conditions:

Space limitations:________

Climate conditions: indoor and outdoor

The connection between energy and products:________

Work platform, etc.

5. Regulations:

Safety requirements:________

Noise indicators: ________

Environmental protection indicators:________

Blad structure of hinge-bladed wiped film evaporator

Wiped film evaporator ready for test running