Industrial Fix - Bladed Wiped Film Evaporator

Wuxi Hongdinghua Chemical Equipment Co.,Ltd is Industrial Fix - Bladed Wiped Film Evaporator manufacturers and suppliers in China, we can provide professional service and better price for you.  Wuxi Hongdinghua Chemical Equipment Co., Ltd. has designed and manufactured various forms of wiped film evaporators for customers. Fix-bladed wiped film evaporator is a type of wiped film evaporator with high manufacture precision and installation precision.

Working principle of fix-bladed wiped film evaporator

The blade of the fix-bladed wiped film evaporator is made of metal material, which is rigidly connected to the rotor. The length of the scraper is the same as that of the evaporation cylinder. The gap between the rotating blade and the inner wall of the evaporation cylinder is 1-2mm. It is suitable for the evaporation, concentration, dissolution or purification of materials with extra high viscosity and easy to form foam. A fix-bladed wiped evaporator is also composed of one or more cylindrical bodies with jacket heating and a rotating blade inside the cylinder. The blade continuously wipes the raw material entering the fix-bladed wiped film evaporator into a thick and uniform liquid film 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 fix-bladed wiped film evaporator

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

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

2. Vapor liquid separation chamber: materials enter the fix-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 fix-bladed wiped film evaporator through the liquid distributor at the lower part of the vapor liquid separation chamber. The secondary steam evaporated from the evaporation chamber rises to the separation chamber at the upper part of the fix-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 fix-bladed wiped film evaporator from the outlet at the upper end.

3. Liquid distributor: Installed on the rotor, the material enters the fix-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.

The inner surface of the evaporation chamber needs to be precisely machined and polished to ensure that the wall thickness of the evaporation chamber meets the strength requirements. Moreover, during assembly, it is necessary to ensure the eccentricity between the rotor and the axis of the evaporation chamber, and its processing and assembly accuracy far exceed other forms of wiped film evaporators.

6.Rotor: The rotor is driven by an electric motor and a reducer, performing circular motion, with reliable strength and high stability.

7. Blade: The blade is rigidly connected to the rotary shaft and processed by precision machining, performing circular motion to continuously wipe the raw material onto the evaporation surface into a thin film, achieving the effect of thin film evaporation.

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 fix-bladed wiped film evaporator are as follows:

1. Minimal pressure loss

The raw material In a fix-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; Stable thermal resistance due to even film thickness; 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

Because of the structure of fix-bladed wiped film evaporator ,fix-bladed wiped film evaporator can be used to handle high viscosity, foamy, thermal sensitivity raw material that are difficult to handle by conventional evaporators

The Fix-bladed wiped film evaporator manufactured by HDH is widely recognized and accepted, and the fix-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)

Details of fix-bladed wiped film evaporator

Fix-bladed wiped film evaporator is a type of wiped film evaporator, and its structural characteristics are as follows:

A fix-bladed wiped film evaporator, with a film wiping blade form similar to a mixer, is equipped with a rigid blade rotor. The length of the wiping film and the height of the heating surface are the same, and the gap between the wiping film and the heating wall surface is adjusted to 1-3mm based on the width of the wiping film and the size of the evaporator, so there is no wear on the heating surface. This closed type structure and very smooth surface rotor are easy to clean, therefore, the material has a wide range of applications and is very suitable for the food industry, as well as the GMP requirements of the pharmaceutical industry. It can handle raw material with a viscosity of approximately 50000 mpas. The rigid blades of the fix-bladed wiped film evaporator can also be made into spiral shapes, which can handle raw material with a viscosity of up to 70000 mpas. The blade material is the same as the evaporator cylinder material.

fix-bladed wiped film evaporator details

Wuxi Hongdinghua Chemical Equipment Co., Ltd. needs to comprehensively consider the following factors when assisting customers in selecting fix-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 

3. Operating medium (heat source): 

Water vapor:________ (pressure) 

Cooling water temperature: _________℃ 

Cleaning solution (solvent): _________

4. Material selection for manufacturing: 

Surface polishing requirements: _______

5. Site conditions: 

Space limitations: ______

Climate conditions: indoor and outdoor 

The connection between energy and products: _______

Work platform, etc.

6. Regulations: 

Safety requirements: _________

Noise indicators: _______

Environmental protection indicators:_______

Fix-bladed wiped film evaporator

Wiped film evaporator ready for test running