MEPL- ROTARY VACUUM PADDLE DRYER (RVPD):

• Product filter is very efficiently used to arrest valuable product carried away with the vapours in a filter bag. The arrested product particles are thrown back into the dryer by reverse flow of pulsating air. Generally the product filters are heated to avoid condensation of vapours in the filter bag.

• User friendly discharge value design provides vacuum closing when the material is being processed and quick opening lever facilitates filling of bags when material is discharge and packed.

• Breaker bars are incorporated in the RVPD to break the lumps where the product forms lumps during drying.

• Insulation and cladding provided on heating jacket/limpet coil.

PROCESS ADVANTAGES

• These dryers give optimum performance with very high heat transfer rates.

• They have been successfully used for reaction, crystallization, and extraction operations in addition to the primary function of drying.

• Low temperature drying for heat sensitive product is possible.

• Complete solvent recovery is possible with this RVPD.

The Cantilever Model have following versatile features:

• Full door opening for ease of operation, cleaning and validation.

• Clean area installation possible with stainless steel partition wall between the process area and drives.

• The paddle dryer is also supplied with machined and mirror polished insides surfaces with PTFE scrapers.

Rotary vacuum paddle dryer or Paddle dryer is used to obtain dry powder from wet cake or solutions. The efficiency is extremely high with lower cost compared to other types of dryers. It is a closed system in which hot water, steam, or hot fluid is used as a heating medium in the jacket, the hollow paddle and the hollow shaft. The continuous agitation by means of heated rotating paddles and minimum clearance between scrapers and heated walls provide a good heat transfer to the wet feed. This results in the solvent/moisture evaporating and renders the wet material dry, to the required degree. The vapours formed are removed by means of vacuum. Absence of large air flow virtually eliminates dust problems while keeping the energy consumption low. Some salient features are described below:

SALIENT FEATURES:

• Common base frame is unique to this system. This eliminates the foundation costs and reduces the maintenance cost.

• Drying optimisation, done by means of external and internal heating. External heating is provided through the jacket or limpet coils, while internal heating is done through a hollow shaft and a set of hollow paddles. Hollow paddles are provided with scrapers having very low gap from wall to maximise heat transfer. Scrapers move material to all parts of ht dryer and also help in discharging the material.

• The hollow rotating agitator shaft imparts heat to the product, scrapes the shell wall, tumbles the product for maximum heat transfer and discharge product when required.

• Mechanical seals at shell ends/stuffing box.

• The vessel is well designed to take temperature stresses during vacuum drying. Low power consumption by the use of helical bevel gear box.

• Special floating bearing design to combat temperature stresses.

• To remove the condensate formed by stream heating in the hallow shaft, special rotary joints are also designed to introduce heating media in the hollow shaft.

CANTILEVER MODEL

TECHNICAL SPECIFICATIONS