Rotary Dryers / Coolers are widely used in the Industry for drying / cooling of reasonably free flowing materials.

AVM offers Customized Rotary Drying Systems with variety of Configurations.

The material to be dried / cooled comes in direct contact with the drying / cooling media.

The rotary dryers compris of a rotating shell supported on rollers / tyres and driven by means of suitable drive arrangement. Drying / Cooling media ( Air / Gas ) is admitted through stationary hood at one end & taken out from stationary hood from other end. Feed is admitted through suitable feeding mechanism like Screw feeder / Chute. The rotating shell in these rotary drying systems is provided with specially designed material showering mechanism like Lifters / Garland Chains etc. Shell inclination & rotating speed facilitate forward movement of the material towards discharge end providing required residence time. Drying ( or Cooling ) takes place by heat transfer to ( or from ) showering material with the drying ( or Cooling ) media within the shell. Rotary drying systems are discharged from the stationary hood through suitable equipment like Flap Valve / Rotary Valve / Screw Conveyor / Chute.

Air Flow Configurations:

• Co-Current Flow.
• Counter-Current Flow.

Air Heating System Configurations :

• Direct Fired / Indirect Fired Air Heaters: using Liquid / Gaseous Fuels.
• Direct / Indirect Fired Air Heaters: using Solid Fuels, Agro Waste, Saw Dust, Rice Husk, Coal, Briquette etc.
• Indirect Air Heaters: Using Steam / Hot Oil / Thermic Fluid.
• Electric Air Heaters: using electricity.

Product / Fines Recovery System Configurations:

• Cyclone Separators: Mono, Twin, Quadruple, Multi etc.
• Bag Filters: Reverse Pulsejet, Mechanical shaking etc.
• Wet Scrubbers � Direct Contact Ventury, Adjustable Ventury, Packed scrubbers etc.

Optional Features Configurations:

• Feed material conditioning.
• Back mixing of product with feed material.
• Pneumatic conveying system and finish product handling.
• Computerized control system through PLC / DCS & SCADA.

In-Direct Rotary Dryers:
The material to be dried does not come in direct contact with the drying media.

The rotary dryers comprise of an assembly of two concentric rotating shell supported on rollers / tyres and driven by means of suitable drive arrangement. Feed is admitted through suitable feeding mechanism like Screw feeder / Flap Valve into the dryer through stationary feed hood. The drying media is admitted through the inner shell & travel towards discharge end & again returns towards feed end through specially designed return gas passages on the inside of outer shell. The inner shell is also provided with suitable radial lifters. These lifters alongwith return passages geometry is designed for showering of feed material. Shell inclination & rotating speed facilitate forward movement of the material towards discharge end providing required residence time. Drying takes place by heat transfer to the showering material by direct contact with inner shell & return passages. Product is discharged from the stationary hood through suitable equipment.

Air Heating System Configurations:

• Direct Fired Air Heaters: using Liquid / Gaseous Fuels.
• Direct Fired Air Heaters: using Solid Fuels, Agro Waste, Saw Dust, Rice Husk, Coal, Briquette etc.

Product / Fines Recovery System Configurations:

• Cyclone Separators: Mono, Twin, Quadruple, Multi etc.
• Bag Filters: Reverse Pulsejet, Mechanical shaking etc.
• Wet Scrubbers � Direct Contact Ventury, Adjustable Ventury, Packed scrubbers etc.

Optional Features Configurations:

• Feed material conditioning.
• Back-mixing of product with feed material.
• Pneumatic conveying system and finish product handling.
• Computerized control system through PLC / DCS & SCADA.

Rotary calciners are used for calcining of the material at high temperature.

The Rotary Calciner comprises of rotating shell supported on rollers / tyres and driven by means of suitable drive arrangement The internals are suitably refractory lined to minimize the heat losses. The combustion chamber is used for producing hot gases required for the calcination and it is connected to the Rotary Calciner through a stationary hood. The feed material is fed into the calciner feed hood through Screw Conveyor at controlled rate. The material to be calcined travel in counter current fashion within the Calciner and gets discharge through discharge hood.

Air Heating System Configurations:

• Direct Fired / Indirect Fired Air Heaters: using Liquid / Gaseous Fuels.
• Direct / Indirect Fired Air Heaters: using Solid Fuels, Agro Waste, Saw Dust, Rice Husk, Coal, Briquette etc.

Fines Recovery Options:

• Cyclone Separators � Mono, Twin, Quadruple etc.
• Bag Filters � Reverse Pulsejet, Mechanical shaking etc.

Optional Features:

• Pulverising of Feed / Product
• Feed Material Pre-Heating Arrangement.
• Rotary Cooler for cooling of calcined product.
• Pneumatic conveying systems for feed material and finish product handling.
• Computerized control system through PLC / DCS & SCADA.

Tunnel dryers and tunnel drying systems are ideal for drying of Granulated / Extruded / Briquettes / Flakes / Fibrous / Pre Formed materials.

Few of the applications of tunnel dryers and tunnel drying systems are Ceramic Fiber Papers, Ceramic Fiber Boards, Molded Paper Products, Rayon Staple, Cotton linters, Noodles, Food products etc.

AVM offers Customized Tunnel Drying Systems with variety of Configurations.

Operation Configurations:

• Continuous / Semi-continuous/ Batch
• Single Pass / Multi Pass
• Single / Multi Temperature & Airflow Controlled Zones
• Once through / Re-circulating air modules--

Air Flow Patterns Configurations:

• Parallel Flow
• Counter-current Flow
• Cross Flow
• Combination Flow
• Through Circulation

Material Movement Configurations:

• Continuous on Metallic Mesh Belt Conveyor
• Continuous on chain mounted Moving Trays / Pallets
• Semi-Continuous on Carts / Trolleys
• Batch on Trays / Trolleys / Pallets

Air Heating System Configurations :

• Direct Fired / Indirect Fired Air Heaters: using Liquid / Gaseous Fuels.
• Direct / Indirect Fired Air Heaters: using Solid Fuels, Agro Waste, Saw Dust, Rice Husk, Coal, Briquette etc.
• Indirect Air Heaters: Using Steam / Hot Oil / Thermic Fluid
• Electric Air Heaters: using electricity.

AVM produces a variety of industrial conduction dryers like tube bundle dryers, rotatory speed dryers, rotor type dryers that are used for different types of products and can be customized as per customer needs.

In this dryer, tube bundle is rotating inside stationary housing.

Heating Media is passed through the tubes of Tube Bundle. Material to be dried is fed into the stationary dryer housing at suitable location at one end. The material gets lifted up & showered on tubes with help of specially designed lifters provided on tube bundle periphery. Material gets dried by conduction heat transfer & discharged from the other end.

AVM offers customized configurations of Tube Bundle Dryers.

• Material Flow: Co-current / Counter-current.
• Vapor Exhaust: Natural Draft / Induced Draft.
• Fines Recovery: Cyclones / Bag Filters / Settling Chambers.
• Heating Media: Steam / Hot Oil / Thermic Fluid.
• Feed preconditioning, Product back-mixing systems.
• Feed & product handling, conveying systems.

In this dryer, tubes are fixed to the outer shell housing & rotate along with the shell.

Single / Multiple rows of tubes are circumferentially arranged on the internal periphery of the rotary shell. Rotary shell is supported on tyres / rollers & driven through suitable drive arrangement . Wet feed material is fed through center of one end of the Dryer by feed screw. Steam is admitted in the circumferential tubes from a rotating manifold installed towards material discharge end of the shell through Rotary Joint. Condensate is also collected through the same Rotary Joint. Material gets dried by conduction heat transfer & discharged from the openings provided on the shell at the other end. The openings also serve for fresh air intake. Vapours are removed from the feed end. spiral flight lifters showered the feed material on tubes.

AVM offers customized configurations of Rotary Steam Tube Dryers.

• Vapor Exhaust: Natural Draft / Induced Draft.
• Fines Recovery: Cyclones / Bag Filters / Settling Chambers.
• Heating Media: Steam / Hot Oil / Thermic Fluid.
• Feed preconditioning, Product back-mixing systems.
• Feed & product handling, conveying systems.

AVM offers customized configurations of Agitated Rotor Dryers.

When used as Dryer / Heater, heat is supplied to jacket of stationary cylindrical housing. The material to be dried is kept in agitation by means of specially designed rotor.

Rotor is specifically configured depending on material characteristics & can be Screw / Ribbon / Paddle / Plough / Anchor / Special Type etc.

Heating Media can be Steam / Hot Oil / Hot Water / Thermic Fluid etc.

Solvent Recovery option is also possible.

For using as Cooler, suitable Cooling Media can be circulated in the jacket.

Vacuum Dryers are widely used in the Industry for drying of variety of products.

Vacuum Dryers are batch dryers ideal for drying of heat sensitive products, drying of products in solvents ( for subsequent solvent recovery ), drying requirements necessitating achievement of very low moisture or low oxygen drying environment to minimize oxidation or for explosion prone products.

AVM offers Customized Vacuum Drying Systems with variety of Configurations.

In these dryers, heat is supplied to jacket of stationary cylindrical housing. The material to be dried is kept in agitation by means of specially designed rotor.

Features Configurations:

• Rotor Types: Helical Ribbon, Paddles, and Special.
• Heating Surfaces: Shell, End Covers, and Shaft.
• Heating Media: Steam, Hot Water/Oil, Thermic Fluid.
• Side Mounted Choppers.
• Solvent Recovery.

In these dryers, heat is supplied to double conical shaped rotating jacket. The material to be dried is kept in continuous tumbling within the rotating housing. Conical shape facilitates easy drain out of material at the end of the batch.

Features Configurations:

• Heating Media: Steam, Hot Water/Oil, Thermic Fluid.
• Side Mounted Choppers.
• Solvent Recovery.

Rotary Atomizers are used in Spray Drying for atomizing the feed into fine droplets. In Rotary Atomizers, the kinetic energy of wheel rotation is used for atomization of the liquid.

Droplet size of atomized liquid depends upon liquid properties, disc speed, disc configuration etc. Bulk density is also one of the critical product requirement of spray dried products. The desired results can be achieved by using different Atomizer wheel configurations and optimizing atomizer speed, optimizing relevant feed properties.

AVM offers following models of Rotary Atomizers.

Model No	Wheel Diameter	Water Feed Rate	Connected Power
Model RDA-060	60 mm	20 ltr/h.	0.37 kW
Model RDA-100	100 mm	60 ltr/h.	1.10 kW
Model RDA-115	115 mm	120 ltr/h.	2.20 kW
Model RDA-160	160 mm	750 ltr/h.	5.50 kW
Model RDA-210	210 mm	1500 ltr/h.	11.00 kW
Model RDA-250	250 mm	3000 ltr/h.	37.50 kW
Model RDA-300	300 mm	4500 ltr/h.	45.00 kW
Model RDA-350	350 mm	10000 ltr/h.	75.00 kW
Model RDA-400	400 mm	12000 ltr/h.	110.00 kW

Wheel Configurations: Standard wheel with radial openings, Pin wheel, Curved Vane Wheel, Slotted wheel, Non String Forming Wheel, Umbrella type Wheel etc.

Lubrication System Options : Gravitational Wick Lubrication. / Forced Lubrication

Optional Features: Speed Indication, Vibration Monitoring, Steam sparging.

New AVM Systech offers customized auxiliary systems for industrial drying units. The array includes Air Heaters / Gas Heaters / Hot Air Generator Systems; Exhaust Emission / Pollution Control / Fines Recovery Systems; and Material Handling / Feed & Product Conditioning / Cip Systems. These are designed as per client's requirement and in compliance to industry defined safety & performance standards. Different types of auxiliaries are manufactured in compatible configurations.

AVM offers wide range of customized Heating Systems with variety of Configurations.

Types of Indirect Heated Air / Gas Heating Systems offered:

• Multiple Concentric Shells Type.
• Shell & Tube Type.
• Multi - Coils in Shell Type.
• External Recuperator Type.
• Tube Bundle over Combustor Bed.
• Finned Tube Type Air Heater

Types of Direct Fired Air / Gas Heating Systems Offered:

• Single Shell Combustion Chamber.
• F.B. Combustor.
• Multiple Concentric Shell all metal construction (Without Refractory Lining)
• Concentric Shell Type With Refractory Lining
• Duct Mounted.

Operating Capacities of Heating Systems:

• Air Flow Rates up to 150,000 Nm^3/hr. Higher flow rates can also be offered.
• Heated Air Temperatures up to 690 �C for Indirect Type.
• Heated Air Temperatures up to 1500 �C for Direct Fired Type.

Types of Fuels / Heating Media for Heating Systems:

• Liquid Fuels: HSD, Light Oil, Heavy Oil, SKO etc.
• Gaseous Fuels: LNG, CNG, Propone, LPG, Producer Gas, Bio Gas etc.
• Solid Fuels: Bio-waste, Saw Dust, Wood Chips, Coal, Rice Husk, Briquettes etc.
• Heating Media: Steam, Hot Oil, Thermic Fluid, Electricity etc.

AVM offers customized Systems exhaust emission / pollution control / fines recovery systems with variety of Configurations.

Bag Filters / Dust Collection Systems:
AVM offers Reverse Pulse Jet type Bag Filters for Industrial applications in several customized configurations.

• Pulsing Configurations: On-Line Pulsing, Modular Off-Line Pulsing.
• Flow Rates: As per system requirement.
• Operating Temperature Range: Up to 260�C.
• Housing Type: Cylindrical Housing, Rectangular Housing.
• Air Entry Configurations: Hopper entry with side / central distribution, Tangential entry.
• Plenum Configurations: Top Access, Walk through etc.
• Electrical heat tracing for bottom hopper.
• Cleaning In Place system ( CIP) for special applications.
• Safety Accessories like Fire fighting system, Explosion vents, Antistatic construction etc.
• Air Ingress system for filter bags protection against temperature surges.

Bag filters with Mechanical shaking arrangement can also be offered.

Cyclone Separators:

• Mono, Twin, Quadruple, Multiple Cyclones depending on system requirement.
• Tangential, Wrap Around Inlet configurations.
• Distributed Inlet & Outlet configurations for Multiple Cyclones.

Wet Scrubbing Systems:

• Direct Contact Spray Type Ventury Scrubbers.
• Droplet Separators.
• Adjustable area ventury type with manual / automated adjustment.
• Scrubbers with tower packing, saddle packing, demister mesh packings

AVM offers customized Systems with variety of Configurations.

Blenders / Powder Mixers:

• Equipments configured for Batch or Continuous Operation.
• Capacities as per system requirements.
• Paddle Type Blenders.
• Ribbon Type Blenders.
• Special Rotor Type Blendors.
• Double Cone Blenders.
• Double Shaft Paddle Mixers.
• Online Product Blenders with controlled liquid dosing as per system requirements.

Liquid Feed / Slurry Preparation Systems:

• Agitated Reaction Vessels.
• Vessels with Heating, cooling, sparging mechanism.
• High Speed Blungers.

Material Handling Systems:

• Double Flap Valves: Motorised / Counterweight type.
• Rotary Air Lock Valves : Drop Through / Blow Through type.
• Rotary Feeders.
• Screw Conveyors.
• Pneumatic Conveying Systems: Lean Phase Suction Type.
• Pneumatic Conveying Systems: Lean Phase Positive Pressure Type.

Cleaning In Place ( CIP ) Systems

• Single Tank System / Three Tank System
• A Motor Winch system for large vessels cleaning
• Wall flush nozzles for cleaning OD DUCTING equipment
• Fully automated systems with PLC / DCS & SCADA

'AVM' also undertakes execution of systems for manufacturing of following products, including raw material handling, processing, product finishing & finish product packing sections.

• China Clay.
• Detergents.
• Formulated Agro-chemicals.
• Pulp Molded Products.
• Starch / Starch Derivatives.