الوصف

The rotary scraper type film evaporator is a kind of new high-efficiency evaporator that carries out falling film evaporation under vacuum through forced film forming by rotary scraper. With such features as high heat transfer coefficient, high evaporation intensity, short flow passing time and high operating elasticity, it is especially suitable for evaporation, concentration, degassing, precipitation, distillation and purification of heat sensitive materials, materials of high viscosity, materials easy to crystallize and materials containing granules. It is widely applied in chemical industry, petrochemical industry, medicine, fertilizer, daily chemicals, food, fine chemical industry, etc.
STRUCTURAL FEATURES
1. Motor and speed reducer.
It is the driving unit for rotor rotation. The rotating speed of rotor depends on the form of scraper, material viscosity and inside diameter of evaporating cylinder. The selection of a suitable linear speed of the scraper is an important parameter to guarantee stable and reliable operation of the evaporator and satisfactory evaporating effect.
2. Separating barrel
3. Material spreader
4. Gas-liquid separator
5. Evaporating cylinder
6. Rotor
The rotor installed inside the evaporating cylinder is composed of rotary shaft and rotary bracket. Driven by motor and reducer, the rotor drives the scraper to make circular motion. The rotary bracket is made of stainless steel precision castings, so that its strength, geometrical dimensions, stability, etc. are effectively guaranteed.
7. Scraper
1) Sliding scraper
the scraper adopts filled PTFE
2) Fixed scraper
The fixed scraper is made of metal materials.It is suitable for evaporation, concentration, precipitation and purification of materials of high viscosity and those easy to produce bubbles.
3) Hinge scraper
The scraper is suitable for materials that easily form scaling on the heating surface.
8. Bottom head
PERFORMANCE FEATURES
1. Very low pressure loss
2. Operation under vacuum can be realized in a real sense
3. High heat transfer coefficient and high evaporation intensity
4. Low temperature evaporation
5. Short flow passing time
6. Low grade steam can be utilized
7. Strong adaptability and convenient operation
8. Jacket pressure: normally designed according to 0.4Mpa steam, or designed according to user requirements. When heat transfer oil is adopted, other design can also be made.
9. Vacuum degree inside evaporating cylinder: normally designed according to *0.*9Mpa (about ***0mmHg), or *0.**5Mpa (about ***0mmHg) and *0.***6Mpa (about ***0mmHg) can also be designed according to user requirements.
*0. Materials of main cylinder (parts that contact materials) and jacket: carbon steel, SUS**4, **6L, **6Ti, **0S, titanium, nickel, etc. can be adopted according to actual conditions and user requirements.