PRINCIPLE OF OPERATION:
The PerMix PTP-D series vacuum dryer is used for drying operations and is usually operated at a speed higher than the critical speed, at any drying rate and for thorough drying after phase change. In combination with the action of the rotary mixer and the multi-chopper system in the machine, a high degree of fluidization of the dried material occurs. This promotes the evaporation of liquids. The enormous speed at which evaporation takes place practically eliminates the need for the usual auxiliary processes such as scrubbing and absorption with solvents.
For vacuum drying, the PerMix PTP-D series vacuum dryers/mixers can be filled from 50 to 75 percent. Thanks to the rapid change of material at the contact surface, the total heat exchange surface is optimally utilized. The integrated rotating cutting unit ensures that the product is free from agglomerates and the grain size is so fine that subsequent micronization is usually no longer necessary. The filter chamber connected to the vacuum dome has a mechanical or pneumatic control for filter cleaning. Additional devices for vapor removal or solvent recovery take into account the individual requirements of the user.
ADVANTAGES AND OPTIONS:
There are many different features and options available for the PTP-D vacuum dryers, including:
- Various mixing elements (blades, blades, ribbons or combined elements)
- Multi-shredder vacuum dryers
- Various sealing arrangements (string seals, double mechanical seals, Cinchseal, etc.)
- Filter in vacuum housing
- Heating jacket: electric, thermal oil, steam, etc.
- Hemispherical drain valve or other types of valves
- Special nozzle/spray or coating unit
- Construction with opening wall/inspection door
- Pneumatic hemispherical drain valve
- Unloading screw
- Made of various types of steel (AISI 304, AISI 316L, Titanium, Duplex steel, Hastelloy, etc.)
- Heated main shaft
- Sampler
- Explosion-proof design (ATEX)
- Control panel, etc.
Advantages:
The following advantages of the PerMix PTPD vacuum dryer distinguish it from others:
- Cost savings: The PerMix PTP-D series vacuum dryer combines several machines into one, resulting in less piping, less controls, and less space requirements.
- Short response time
- Optimum heat exchange through large contact surfaces
- Turbulent mixing and mechanical fluidization of the materials involved in the reaction
- No dead zones in the dryer/reactor and no dead zones in the unloading areas
- The PerMix PTP-D series vacuum dryer can also be supplied with replaceable mixing elements.
- Easy to clean and sterilize
- Long service life achieved thanks to the use of durable construction materials such as acid-resistant steel, Hastelloy, titanium, nickel alloys
