DRYTECH INTERNATIONAL (PTY) LTD
   
 
Physical Address:
50 Mimetes Road
Denver
Johannesburg
Gauteng
South Africa
 
Telephone Number:
+27 (0)11 622-2773
 
Fax Number:
+27 (0)11 615-1801
086 530-4361
 
 
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Drytech - Thermal Drying - Flash Drying - Spray Drying - Rotary Drying - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Fluid Bed Dryers and Fluidized Bed Combustors
Drytech - Thermal Drying - Flash Drying - Spray Drying - Fluid Bed Drying (static and vibrated) - Rotary Drying - Roto Louver Drying - Vacuum Drying (Batch or continuous) - Calcination and Conveyor DryingDrytech - Thermal Drying - Spray Drying - Fluid Bed Drying (static and vibrated) - Rotary Drying - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Custom Designed Dryers and Flash DryersDrytech - Thermal Drying - Flash Drying - Spray Drying - Rotary Drying - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Fluid Bed Dryers and Fluidized Bed CombustorsDrytech - Thermal Drying - Flash Drying - Fluid Bed Drying (static and vibrated) - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Rotary Dryers and Spray Dryers

Drytech - Thermal Drying - Flash Drying - Spray Drying - Fluid Bed Drying (static and vibrated) - Rotary Drying - Roto Louver Drying - Vacuum Drying (Batch or continuous) - Calcination and Conveyor Drying   Drytech - Thermal Drying - Spray Drying - Fluid Bed Drying (static and vibrated) - Rotary Drying - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Custom Designed Dryers and Flash Dryers   Drytech - Thermal Drying - Flash Drying - Spray Drying - Rotary Drying - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Fluid Bed Dryers and Fluidized Bed Combustors   Drytech - Thermal Drying - Flash Drying - Fluid Bed Drying (static and vibrated) - Roto Louver Drying - Conveyor Drying - Vacuum Drying (Batch or continuous) - Calcination - Rotary Dryers and Spray Dryers

Drytech International

 

 

Fluid Bed Dryers

Puffer – popper – roaster – toaster – static, vibrating, through-the-bed, reverse fluid (Kontra-flo) dryers and coolers, from minimum to maximum throughput per hour.

Operation:
Fluid bed drying uses a heated gas to lift and maintain the feed in a fluidized state. Air is introduced into a wind box or plenum via a forced draft fan, and is distributed through a distributor plate of solid material via a perforated plate, nozzles, ceramic grid or other distribution medium. The bed attains fluid-like properties flowing and mixing. The fluidization provides intimate contact between each material particle and the gas stream creating an extremely efficient transfer device. Products that have large particle size variations, or high bulk densities can benefit a vibrating bed.

Feeding / discharge:
Manual, batch, automatic and continuous. Vibrators, screw feeders, rotary airlocks, double flap valves, gravity chutes.

Feed characteristics:
Liquids (only with appropriate technology), powders, granules, non friable agglomerates. Feed needs relatively consistent particle size. Very large particles present challenges. Low to high feed rates.

Heat source:
Steam, electrical, coal, liquid fuels, or gas.

Exposure:
Mostly Direct. Flow is through the bed. Indirect systems (contact) available for certain products.

Residence time:
Controllable. Residence time can be altered by varying the feed and discharge rates. Bed depth can be varied.

Extraction:
Normally induced. Forced draft fans required for fluidization. Systems can have combustion, forced and induced draft fans for operation.

Dust collection:
Cyclones, baghouses, scrubbers, electrostatic precipitators. Systems require dust collection.

Control:
PLC, infrequently solid state controllers. System controls on discharge temperature. Can modulate energy and feed.

Fluidized Bed Combustors

Drytech International has designed and developed a fluid media combustor (FMCTM) system for the combustion of pea and duff coal in thermal processing systems, these systems have been successfully used in industries as Hot Gas Generators since 1986. This system was developed in early 1980, and the first use of the system was the replacement of an underfeed stoker in an animal feed drying application. The heat output of this unit was 4 GJ/hr and the control of the system, although using PLC, was essentially manual. Fluidized Bed Combustors

The FMCTM system has grown from its original use in the animal feed drying industry to the human foods, mineral and mining industries. Systems have been developed to produce up to 75 GJ/hr from a single unit without losing the quality of performance demonstrated in the original small systems. The units are highly automated and instrumented, and have demonstrated reliability in the mining industry. These machines are robust and provide flexibility on the start up fuels available. They have burnt a wide range of solid fuels regardless of the initial system supply arrangement.

The range of applications that this system has been used for and the degree of flexibility in tailoring the system between simple operation and highly automated operation make this fluidized bed combustor the ideal Hot Gas Generating System for a wide range of industries.

The world's leading mining houses, particularly those in the Southern African Platinum & Mineral Concentrates Industry, use the FMCTM system as the standard system for the generation of hot gas for drying and other processing of mineral concentrates.

 
Fluidized Bed Combustors, Drytech Fluidized Bed Combustor