Spray Dryers

New AVM offers customized spray dryers, mini spray dryers and spray drying systems in different configurations. The dryers are made to convert liquid solutions/suspensions/slurry/emulsions to powder, granules or agglomerates. The gross advantage of spray dryers is consistent product quality with better control on product parameters like product moisture, bulk density, particle size, dispersion, flow ability etc.

Air Flow Pattern Configurations :

• Co- current
• Counter-current
• Mixed flow

Combination of Systems Configurations:

Two Stage Spray Dryer - spray dryers followed by fluid bed dryer for drying products which require longer residence time & product conditioning post drying.
Three Stage Spray Dryer - spray dryers with Internal fluid bed followed by external fluid bed dryer for producing dust free agglomerates.

Liquid Atomizer Configurations:

Single Fluid Nozzle Atomizers.
The liquid feed is atomized into spray droplets by using pressure energy.

Two Fluid Nozzle Atomizers.
The liquid feed is atomized into spray droplets by using energy of secondary fluid like Compressed Air, Nitrogen etc.

Rotary Disc Atomizers / Rotary Atomizers.
In Rotary disc Atomizers, the kinetic energy of wheel is used for atomization.

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:

• Rotating air brooms with dehumidified air.
• Roof cooling. Rotary atomizer Cooling. Nozzle Lance Cooling.
• Online Dosing & Blending system.
• Product Cooling & conveying system.
• Online gas induction system in feed liquid.
• Feed Preparation system.
• Closed Loop Systems / Self Inertized Systems with inert gas as process drying media.
• Solvent Recovery Systems.
• Cleaning in Place Systems.
• Heat Recovery Systems.
• CGMP Construction.
• Safety accessories like Explosion vents with pressure shock resistant design for equipments, explosion de-coupling, Mechanical flame diverter, Vacuum breaker, Fire fighting system
• Computerized control system through PLC / DCS & SCADA.

It's includes:

Two Stage Spray Dryer
This two stage spray dryer is equipped with fluid bed dryer for drying products which require longer residence time & product conditioning post drying.

Three Stage Spray Dryer
This three stage spray dryer has an internal fluid bed equipped with fluid bed dryer for producing free agglomerates.

Pilot Spray Dryer

AVM Pilot or mini spray dryer is an ideal tool for laboratory testing, Small-scale powder production requirements and is designed for an evaporation capacity ranging from 3 kg/hr to 60 kg/hr. The AVM pilot spray dryers comprise of Air heating section, Spray chamber, Cyclone separator, Bag filter liquid pumping system, liquid atomization system, air circulation blowers, Control Panel with Instruments.

AVM offers Pilot / Mini Spray Dryers with variety of Configurations.

Air Heating System Configurations:

• Direct Fired / Indirect Fired Air Heaters: using Liquid / Gaseous Fuels.
• Indirect Air Heaters: Using Steam / Hot Oil / Thermic Fluid
• Electric Air Heaters: using electricity.

Feed Liquid Atomization Options:

• Rotary Disc Atomizers.
• Two Fluid nozzles.
• High Pressure Nozzles.

Additional Features Configuration:

• 2 Stage Systems with Internal Fluidized Bed.
• Closed Loop Systems with inert gas as process drying media.
• Solvent Recovery System.
• Rotating air Brooms for sweeping chamber walls.
• Air Cooled Jacketed Chamber.
• Pre-dehumidification of Drying Air.
• Special Materials of Construction.
• CGMP construction.
• Computerized control system through PLC / DCS & SCADA.

Flash Dryer

We specialize in offering our clients flash dryers, which are widely demanded in the global market. In these flash dryers, wet feed is dispersed into the hot air where the material gets dried during conveying travel through the drying duct & separated in the Cyclones or bag filters. Some applications require pre-conditioning of feed by back-mixing of dry product or mixing with oversize particles tapped through particle classifiers installed at suitable locations on the drying duct.
AVM offers Customized Flash Drying Systems with variety of Configurations.

Material Feeding Configurations:

• Mono Screw Feeder
• Double Screw Feeder.
• Double Paddle Mixer for back mixing of dry product.
• Feed Bin with Lump Breaker.
• Volumetric feeder.
• Rotary Feeder.

Feed Disperser Configurations:

• Sling Fan.
• Cage Mill.
• Mechanical Scatterer.
• Chain Slinger.
• Ventury Feeder.
• Combinations of above.

Oversize Particle Classifier Configurations:

• Deflector Hood
• Ring Classifier

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 Pulse jet, Mechanical shaking etc.
• Wet Scrubbers – Direct Contact Ventury, Adjustable Ventury, Packed scrubbers etc.

Optional Features Configurations:

• Product Cooling and Conveying Systems.
• Exhaust gases Recycling for better thermal efficiencies.
• Safety accessories like Static Jumpers, Fire Fighting Systems, Rupture Disc etc.
• Computerized control system through PLC / DCS & SCADA.

Agitated Swirl Flash Dryers

In these dryers, the wet feed is fed into the dryer housing by suitable feeding mechanism above the rotating swirl agitator. The hot air / gas stream is also admitted in the drying duct through specially designed distributor, admitting the air in swirling fashion. The material remains in agitated bed & dried material gets carried forward & separated in the Cyclones or bag filters. Some applications require pre-conditioning of feed by back-mixing of dry product.
AVM offers Customized Agitated Swirl Flash Drying Systems with variety of Configurations.

Material Feeding Configurations:

• Mono Screw Feeder
• Double Screw Feeder.
• Double Paddle Mixer for back mixing of dry product.
• Feed Bin with Lump Breaker.
• Volumetric feeder.
• Rotary Feeder.
• Specially design double shaft feeder followed by mono screw.
• Positive Displacement Screw Pump for Viscous liquid / Pastes.

Particle Classifier Options:

• Orifice Classifier.
• Rotary particle Classifier.

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:

• Product Cooling and Conveying Systems.
• Exhaust gases Recycling for better thermal efficiencies.
• Safety accessories like Static Jumpers, Fire Fighting Systems, Rupture Disc etc.
• Water Cooled Dryer Agitator bearing housing for high temp. operation.
• Computerized control system through PLC / DCS & SCADA.

Fluid Bed Dryer

Fluid Bed Dryers / Cooler are widely used in the Industry for gentle drying / cooling of free flowing solids.

Perforated plate is used to fluidize the material with the help of air stream. the fluidizer can also be made vibratory to assist the fluidization by imparting mechanical energy. Drying / Cooling media (air / gas) is admitted in the plenum below the perforated plate. Fluidized state enables intensive interaction & of the material & drying / cooling media (air / gas) takes place; hence high rates of heat transfer are achieved. Product residence time can be adjusted through adjustable discharge weir. Product Drying and cooling is possible in single unit .

AVM offers Customized Fluid Bed Drying Systems with variety of Configurations.

Continuous Fluid Bed Configurations:

• Static Fluid Bed Dryers
• Vibratory Fluid Bed Dryers

Material Feeding Options:

• Rotary Feeder
• Screw Feeder

Product / Fines Recovery System Configurations:

• Cyclone Separators – Mono, Twin, Quadruple Cyclones etc.
• Bag Filters – Reverse Pulsejet, Mechanical Shaking etc.

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.

Optional Features Configurations :

• Automatic CIP system.
• Liquid Spraying System for Product having requirement of Coating / Lecethination.
• Safety accessories like Rupture Disc, Fire Fighting System.
• Computerized Control System through PLC/ DCS / SCADA.

Rotary Dryer

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.

Direct Rotary Dryers / Coolers

The rotary dryers comprise of a rotating shell which is supported on tyres or rollers. Suitable drive management is made to rotate the dryers. There are two stationary hood at both the ends, one for letting the air or gas and the other to collect the cooling media. Suitable feeding mechanism is used to admit the feed. The feeding mechanism is governed by screw feeder or chute. The rotating shell in these rotary drying systems is provided with specially designed material showering mechanism like Lifters / Garland Chains etc. The forward movement of the material towards discharge end is provided by the shell inclination & rotating speed. The heat transfer within the shell is responsible for drying of the showering material.Product is 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:

Direct contact is avoided for the material to be dried in the drying media. Two concentric rotating shells are used to comprise the rotary dryers. The rollers or tyres on which the shells rest are driven by suitable drive management. Suitable feeding mechanism is resorted to let the feed admitted. The feeding mechanism is governed by screw feeder or flap valve. The inner shell lets the drying media to enter and travel toward the discharge end and again it move back to the point of origin. Suitable radial lifters are provided to the inner shell. This special construct is used to shower the feed material. Shell inclination & rotating speed facilitate forward movement of the material towards discharge end providing required residence time. Heat transfer makes the feed material to dry owing to the special construct of the passage. The stationary hood is used to discharge the product 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

Rotary Calciners are used to calcine materials at high temperature. The rotary calciner comprises of rotating shell, rollers or tyres, combustion chamber, stationary hood, screw conveyor and many more tools. The rotating shell is supported on rollers and a suitable drive arrangement is provided. The internals are suitably refractory lined to minimize the heat losses. The combustion chamber produces hot gases which are required for calcination. This combustion chamber is connected to stationary hood and the feed material is fed at the controlled rate. The calcined material flow in counter current fashion within the calciner and gets discharged 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 Configurations:

• 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 / Conveyor Dryers

Tunnel dryers and tunnel drying systems are perfect machines for drying of Granulated / Extruded / Briquettes / Flakes / Fibrous / Pre Formed materials. There are numerous applications of tunnel dryers including 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.

Conduction Dryers

A variety of machines(industrial conduction dryers) like tube bundle dryers, rotatory speed dryers, rotor type dryers are used in diverse industries and can be tailored to meet the client's requirement.

Tube Bundle Dryers:

In this dryer, tube bundle is rotating inside stationary housing. In tube bundle dryers, the tube bundle rotates inside stationary housing. The material to be heated is passed through the tubes of tube bundle. The heated material is then fed into the stationary dryer housing at suitable location at one end. Conduction as a means of heat transfer takes place when the material is lifted up by the lifters. The lifters are provided on the periphery of the tube bundle.

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.

Rotary Steam Tube Dryers:

In this dryer, the outer shell housing is the fixing point of the tubes and is rotated along with the shell. The circumference of the internal periphery of rotary shell contains the single/multiple rows. Tyres or rollers support the rotary shell and a suitable drive arrangement unit is provided. The feed screw feeds the feed material through the center of one end of the dryer. The circumferential tubes accumulate the steam from a rotating manifold installed towards material discharge end of the shell through Rotary Joint. Condensate is also collected through the same Rotary Joint. The accumulated material gets dried up and is discharged through the other end. The openings serve the dual purpose. It lets fresh air to get into. The vapors are disposed 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.

Agitated Rotor Type Dryer / Heater / Cooler

AVM offers custom tailored Agitated rotor dryers. Heat is supplied to jacket of stationary cylindrical housing when used as dryer/ heater. Specially designed rotor is used to put the material to be dried in agitation. Rotor is specifically configured depending on material characteristics and can be Screw / Ribbon / Paddle / Plough / Anchor / Special Type etc. The heating media can be steam, hot oil, hot water or thermic fluid. Provision for solvent recovery option is also provided. Suitable cooling media can be circulated in the jacket when used as a cooler.

Vacuum Dryers

Vacuum dryers find extensive usage in the industry for drying a variety of products. These vacuum dryers are perfect to dry heat sensitive products, drying of products in solvents, drying requirements necessitating achievement of very low moisture or low oxygen drying environment in order to optimize oxidation or for explosion prone products. AVM offers custom tailored vacuum drying systems with variety of configurations.
AVM offers Customized Vacuum Drying Systems with variety of Configurations.

Agitated Cylindrical Vacuum Dryer

In order to dry the material, the material is kept in agitation by means of specially designed rotor. Then the heat is supplied to jacket of stationary cylindrical housing.

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.

Double Cone Vacuum Dryer:

In these dryers, the rotating jacket has double conical shape where the heat is supplied. Continuous tumbling within the rotating house is used to keep the material dried. The special conical shape drains out the material at the end of the batch.

Features Configurations:

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

Rotary Atomizers

Rotary atomizers are used in spray drying to atomize the feed into fine droplets. Kinetic energy is imparted to the rotary atomizers for atomization of the liquid. The kinetic energy is harnessed from the rotating wheel. The pattern of the droplets of atomized liquid depends upon several factors like liquid properties, disc speed, disc configuration etc. Bulk density of the liquid is also one of the factors for spray dried products. Different atomizer wheel configurations, optimum atomizer speed and optimum relevant feed properties yield desired results.

AVM offers following models of Rotary Atomizers

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