NSI Equipments Pvt. Ltd. Meerut, Uttar Pradesh

The Rotary Dryer is a type of industrial dryer employed to reduce or to minimize the liquid moisture content of the material it is handling by bringing it into direct contact with a heated gas to evaporate the water. Rotary Dryers are suitable for drying of wide range of materials continuously because of its ability to process materials having considerable variation in size and composition.
Despite introduction of new technologies the long established Rotary Dryer is still widely regarded as the workhorse of many process industries. The robust yet simple construction combines flexibility with reliability enabling this type of dryer to handle vast range of materials.

ApplicationRotary dryers are suitable for a wide variety of products, ranging from granular, powdered and crystalline materials, through to filter cakes and sludges for the food, chemical and mineral industries.

Working PrincipleThe drying in a rotary vacuum dryer is a batch operation under vacuum. It is possible to dry heat sensitive materials at well below boiling points of water and solvents. Drying time depends on material being dried, amount of solvent or water to be removed, desired final moisture content, permissible jacket temperature etc. The dryer is available in sizes ranging from 100 liters to 20, 000 liters gross volume. The volume of wet material loaded into the dryer is usually restricted to 50% of gross volume.

Application Area

• Pharmaceutical Industry
• Intermediate Compounds and Fine Chemicals
• Organic Chemicals and Agro Chemicals
• Pesticides, Insecticides and Dyes
• Food Products

Application Area:

• Pharmaceutical Industry
• Intermediate Compounds and Fine Chemicals
• Organic Chemicals and Agro Chemicals
• Pesticides, Insecticides and Dyes
• Food Products

Advantages

• Energy consumption is much less than spray dryers, fluidized bed dryers, flash dryers, rotary dries, tray driers etc.
• Space requirement for installing this dryer is much less than spray dryer, pneumatic dryer, fluidized bed dryer and rotary dryer etc.
• It is a completely automatic plant with temperature controller etc.
• Dry product discharge section of the dryer can be installed in your product packing section, hence cost of transport of dry product to the finished product section can be eliminated.
• Pulverizing after drying will not be required. The unit will dry, classify and convey all in a single operation.
• Wet cake can be directly fed from filter/centrifuge to lump breaker bin, which feeds the cake in to the dryer and hence all intermediate handling of material can be eliminated. The entire system is closed and hence any chance of contamination is eliminated.
• Since it is a closed system, wastage and dusting etc. are totally eliminated resulting in clean environment, zero wastage and total recovery of product and pollution free atmosphere.
• It is possible to vary the bulk densities also by minor changes in the classifier situated near the top of the dryer.

Feature

• High drying efficiency and low energy costs. The energy efficiency of such systems is up to eight percent, which is very high for such types of drying systems.
• Direct drying and no initial diluting.
• Continuous processing with short drying time.
• Ideal for replacing conventional drying systems such as Fluid Bed Dryers, Pneumatic Flash Dryers etc.
• Pulverizing, conveying, classifying etc. can be done on the same system.
• Space utilization is most economical and operations are totally automatic. Most of the time, the product can be directly bagged or sent for further processing.
• Self-regulating, self-adjusting system, which involves minimal attention even while operating at capacity.
• The system being under negative pressure, there is no dusting and therefore no wastage. The area is free from environmental hazards. Clean operation with minimal manual handling is an important feature of the system.

Application

• Direct contact dryers for bulk drying of various products such as inorganic chemicals, bulk drugs, dyestuffs, insecticides foodstuffs etc.
• Chemical industry products like Zinc Carbonates, Calcium Carbonate, Magnesium Carbonate, Cobalt Carbonate, Zirconium, Red Ferric Oxide, Aluminum Hydroxide, Lead Sulphate, Zinc Sulphate, Fire retardant Super - fine Calcium Carbonate, Zinc Oxide, Barium Sulphate, kaolin, Pigment, Dyestuff, Pesticide, Mancozeb etc.

Description:

• The Rotary Dryer is a type of industrial dryer employed to reduce or to minimize the liquid moisture content of the material it is handling by bringing it into direct contact with a heated gas to evaporate the water. Rotary Dryers are suitable for drying of wide range of materials continuously because of its ability to process materials having considerable variation in size and composition.
• Despite introduction of new technologies the long established Rotary Dryer is still widely regarded as the workhorse of many process industries. The robust yet simple construction combines flexibility with reliability enabling this type of dryer to handle vast range of materials.

The material is dryed during a part of revolution and is removed by a blade or scraper. The condensate inside the drum will come out through other port of rotary joint The operation of the drum dryer is controlled by the adjustment of the drum speed and the heat applied.
The material of construction and the size of the drum depend upon the character of the product and its capacity

Features

1. Suitable for processing entire range of feeds, except liquids
2. Product, granular, powdery
3. Very high evaporation capacity. It consumes 1.2 kg of steam to evaporate 1kg of water for to drying slurry state of material.
4. Very high thermal efficiency
5. Partial drying possible
6. Continuous operation
7. Compact installation

Typical Applications

1. Agro waste in sludge form.
2. Crystalline Solids.
3. Pasty Solids.
4. Biological sludge.
5. PHBA
6. Nylon granules.
7. ETP Sludge