Rotary Dryers Coolers Manufacturers – ROTATORY DRYERS COOLERS
Ashoka one of the leading Rotary Dryers Coolers manufacturers In India, Rotary Dryer/Cooler is an industrial equipment engaged for drying or cooling of reasonably free flowing materials by introducing drying/cooling media directly onto the processing material. Material to be dried or cooled goes through the dryer, and as the dryer rotates, the material is raised up through a sequence of inner fins lining fixed on the interior wall of the dryer.
These dryers are available with customization based on different parameters and are available in a number of configurations and specifications. There are two categories of such equipment which are: Direct Heaters/Coolers and Indirect Heaters/Coolers. These rotary dryers/coolers are featured with a rotating shell, which acts as stirrer and conveying device.
Rotary Dryers Coolers Manufacturers Working Principal
In direct heaters/dryers/rotary coolers – the material to be dried or cooled comes in direct contact with the drying or cooling media. Drying or Cooling media is admitted through a stationary inlet hood at one end & taken out from stationary discharge hood at the other end. The Feed is admitted through suitable feeding mechanism such as a screw feeder or simple chute.
The rotating shell is provided with specially designed material showering mechanism such as lifters etc. Ashoka India Manufacturers 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. Product is discharged from the stationary hood through suitable equipment such as a flap valve / valve / screw conveyor / chute.
In indirect heaters/dryers/rotary coolers
The material to be dried does not come in direct contact with the drying media. The dryer comprises of an assembly of two concentric rotating shells supported on rollers and tyre stations and driven by means of suitable drive arrangement. Feed is admitted through suitable feeding mechanism like screw feeder or flap valve into the dryer through a stationary inlet 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. Ashoka India Manufacturers these lifters along with 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 discharge hood through suitable equipment. Rotary Dryers Coolers Manufacturers.
General Design Features
These dryers/coolers are steel fabricated of a big, rotating cylindrical tube, either supported by solid steel columns and beams or supported on supporting rollers and tyres arrangement.
The rotary shell is driven by means of suitable drive arrangement comprising of the girth gear and pinion which is driven through a gear reducer in turn coupled to a motor of suitable rating. Separate pollution control equipment such as bag filters, cyclones or wet scrubbers for fines collection are installed alongside the dryers. Firing Arrangement Various fuel forms and types are used for firing of the dryers. Liquid, gaseous and solid fuels can be used. Rotary Dryers Coolers Manufacturers.