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Hot pellets coming out from Pellet Mill are required to be cooled near ambient temperature to remove excess moisture and heat to improve the shelf life. Counter flow Coolers are fast replacing the old cross-flow or horizontal coolers as these are compact, maintenance free & highly efficient.

Principle

In Counter flow coolers product continuously moves downward direction in a bed of product in “first in first out manner” while cool air passes through product in upward direction. By the time product and air pass each other, they exchange heat & moisture.

Counter Flow Cooler
 
Construction
It is a rectangular chamber made of SS-304 construction having an Air- Lock on top for entrance of material without air escape and a triple-grid-gate for discharge of material.
A stationary or rotating product distributor is installed to evenly distribute the entering product over product bed. A uniform bed height is maintained inside the chamber which can be increased or decreased to control the  retention time by altering the position of level sensor which also initiates discharging mechanism.
Atmospheric air is sucked through the product layer by I. D. Fan which has butterfly valve to control the optimum volume of air required for cooling. Air can also be controlled by using a variable frequency A.C. Drive by altering the RPM of Blower.
The exhaust air is hot & moist and carries the dust particles with it. Dust is removed from exhaust air by installation of a Cyclone. It works on the principle of centrifugal forces.This has an Air Lock below it.
It is very essential to separate dust (fine feed) from exhaust air to avoid shrinkage and air pollution. Properly designed Cyclone with Air Lock at bottom deliver clean air to atmosphere.
 
Stationary Product Distributer-1
Evenly distribution of pellets to maintain even bed height is essential to avoid uneven cooling.
Stationary Product Distributer
 
Butterfly Valve is provided on I. D. Fan to control the optimum volume of air required for effective cooling.
Butterfly Valve


Level Sensor can be adjusted up or down to control the height of bed of pellets inside the cooling chamber to adjust     the retention time for moisture removal from the core of pellets and avoid cooling shock.
Level Sensor


Well designed heavy duty I. D. Fan with balanced rotor
I. D. Fan
 
Technical Specifications ( Dimensions
 
S.
NO.
Model

Capacity
(MT/Hours)

Motor Power (H.P) I.D. Fan's Motor Power Overall Dimensions Approx. Weight in kg.(Without Motor) Volume Seaworthy packing Cu.m.
A B C D E F G H I J K
1
LCFC-3
2-4
1
5 1250 1680 2600 1350 850 165 725 1370 270 580 155 875 10
2
LCFC-6
5-7
1.5
10 1663 2235 3005 1687 945 282 764 1370 270 610 200 1000 16
3
LCFC-10
8-11
1.5
15 2146 2720 3352 1900 952 471 790 1370 270 987 250 1225 25
4 LCFC-15 14-16 2 20 2590 3505 3705 1900 1180 588 790 1370 270 1227 317 1450 40
 
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