Rotary Atomizer Type Spray Coolers
|Minimum Order Quantity||1 Piece|
|Diameters||60 to 350 mm.|
|Outlet air temperature||80-90 degree cel.|
is defined as a process by which a melt is formed into particles of spherical shape by spraying the melt into a cooling chamber through which ambient or cooled, low-temperature air is passing. Rotary (wheel) atomisers and nozzles are used to spray the melt. Spray cooling finds applications in the chemical, food, and pharmaceutical industries. It is a most convenient method of transforming melted feedstocks into free-flowing particulates of controlled particle size.
Reference Products spray cooler is used for following products
- Fats Glycerides Hydrates
- Inorganic/organic melts
- Stearic acid/stearates
- Glycerol Monostearate (GMS)
The selection of a spray cooling plant design depends upon the particle size specified as well as the need for post-cooling / crystallisation for the cooled product
Fine particle products with mean particle size 50-150 micron; co-current conical based cooling chamber with high-speed rotary atomization.
Coarse particle products with mean particle size 150-300 micron; conical based cooling chamber with fountain nozzle.
Utilising closed cycle spray cooling enables optimisation of cooling energy requirements and product quality
Main Components of Spray cooler-
- Cooling Chamber
- Conveying Duct
- Cyclone Separator
- Centrifugal fans
- Heat exchanger
- Feed tank- Jacketed
- Feed Pump
- Feed line and spraying nozzle
- Instruments- Pressure Switch, SRV, Temperature controller, VFD
- Working Principle of the spray Cooler-
- Hot melt is sprayed in the cooling chamber consists of cool air.
- Heat transfer takes place between the hot particle and cool air, forming a fine powder.
- Proper cooling and particle hardening of particle take place in conveying duct.
- In cyclone separator, air and powder get separated and powder is discharged through the rotary valve.
- Air containing less amount of fine particles comes to centrifugal fan.
- The air gets chilled in the heat exchanger and again supplied to the chamber.
- Salient features of spray cooler manufactured by Supreet-
- Single point collection of powder. This ensures less handling of finish product.
- No mitre bends in the ducting avoids material deposition in the system.
- Pressure from 10 kg/cm2 to 200 kg/cm2 can be achieved.
- Thick slurries can be handled and sprayed by giving high pressure.
- Very low maintenance is required (periodical cleaning of heat exchanger tubes).
- All valves are jacketed only- avoids external heating of valve body during start up.
- The total plant is automatic and no man interference is required. Only one man for the powder collection is required