Dryers

WORKING PRINCIPLE:Drying, roasting, heat treatment and cooing is achieved by passing the material being processed through a rotating horizontally inclined cylindrical drum. The stream of hot gas / air for drying and cold air for cooling, also, passes through the drum. As the drum rotates, the internals, Pusher Flights and “Lifters”, fitted into the drum tumble, slide, lift and shower and cascades the material into the air steam. In co- current dryers, the hot gas/air stream flows in the same direction as that of the product being dried, and in counter current model the drying gas / air stream travels against the flow of the product being dried. ln these dryers the product is directly exposed to i.e. in contact of the stream hot gas / air produced by the heat source.

FEATURES:Rotary Drum Dryers are capable of handling large tonnage throughput and are built to with stand rough, rigorous, continuous operation with minimal down time. Rotary Drum Dryer offers a simple solution for continuous drying, cooling, roasting and heat treatment of particulate/bulk solids.

APPLICATIONS: Agricultural Grains & By-Products, Biosolids, Municipal Waste, Paper Sludge, Steel Mill Waste Sludge, Ceramics, Aggregates, Organic & Inorganic Chemicals, Iron Ore Concentrates, Mining Ores & Concentrates, Metal Chips & Shavings, Plastic Pellets.

WORKING PRINCIPLE: Rotary Vacuum Paddle Dryer (RVPD) offers a versatile, clean, simple and effective process solution for Vacuum Drying at Low temperatures, Extraction of useful Liquids, Solvent Distillation / Recovery, Reaction, Crystallization, Process commencing with either Slurries or Pastes or Wet Cake, in Batch Operation carried out by indirect heating and often under Vacuum.

FEATURES: Products having Lumping properties could be easily handled for powder production by use of breaker bars in the RVPD. The Rotary Vacuum Paddle Dryer (RVPD) also known as Vanuleuth Dryer, is a cylindrical vessel with Limpet/jacket for heating and/or Cooling and a central agitator having specially designed scrapper blades.

APPLICATIONS:Dyes & Pigments, Pharma Products & intermediates, Agro- chemicals Like Herbicides, Pesticides, Insecticides, Fine Organic/ Inorganic Chemicals, Waste Disposal.

ADVANTAGES: They are built to perform and sustain/ keep up under rough, rigorous and continues flow of operations with minimal down time.

1. SPIN FLASH DRYERS

WORKING PRINCIPLE: Its ability to handle even most viscous liquids makes it an attractive alternative to spray drying, for which, dilution is required to obtain a pumpable & sprayable feed for drying adding extra load of evaporation and hence more cost of energy.

FEATURES: It is not just the dryer but a full drying system – comprising of wet cake handling & feeding system, air heating system, three-in-one process section with milling, drying, classification and product collection system. The instrumentation and control diagram depicts the instruments and process variables available to ensure proper operations. for obtaining a fine, deagglomerated, homogenous dry product in just one single step process.

APPLICATIONS: Dyestuffs/Pigments, Organic Chemicals: Optical brighteners, Flame Retardant Polymers, Agrochemicals, Suitable for pharmaceutical and food industry, etc.

ADVANTAGES:

• Ability to handle filter cakes, pastes and non-pumpable viscous liquids.

• Effective heat & mass transfer rates.

• Easy to maintain with very low down time.

• Drying of non-heat sensitive products at very high temperatures up to 250°C.

• Entire operation under negative operating pressure ensuring 'dust free' i.e. 'product loss- free' operation.