Invitation to know Coolax Cooler, design and operation

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Coolax Cooler, design and operation

CIS - Controlled Impact System

CFG - Controlled Flow Grate

RFT - Reduced-Fall Thru Grate

 





The COOLAX high efficiency 
grate cooler has greatly improved heat recuperation com-pared with traditional coolers. The efficiency of a grate cooler may be characterized in terms of cooler loss, this being the amount of clinker heat not recirculated to the pyro process. Traditional cool-ears have a loss of about 140 kcal/kg clinker. The COOLAX has a loss of only 95-100kcal/kg clinker. In the heat recuperation zone (CFG zone)the cooling air is supplied direct to
the grate plates through a system of ducts and hollow beams instead of via an under grate compartment as in conventional coolers. On l ya small portion of the air enters the clinker bed from the under grate compartment This is the sealing air. The CFG zone is divided into sectors sup-plied with cooling air from separate fans. These ctors are subdivided into smaller segments each with their own adjustable damper in their supply system. After the CFG zone comes the after-cooling zone with the Reduced Fall Through (RFT)grate. Here cooling air is supplied from under grate compartments, as in conventional coolers, but the grate plates are identical to thrones in the CFG zone. The CFG system Mayan special cases be used throughout the entire cooler. The movable grate rows start at the cooler inlet, which prevents build up and reduces snowman tendencies. Heat recuperation is also improved this way.



Grate plates The pressure drop across the CFG grate platies higher than in traditional grate plates. This ensures perfect air distribution through the clinker bed and greatly improved heat recuperation. In the CFG zone the cooling air is in full contact with the inner surface of the grate plates which are thereby constantly cooled. The thermal load on the plates is there for elbow .The plates are designed to prevent dust from falling through. Each pair of slots is shaped like an inverted T section. The principle is that air will always travel outwards through the slots while any dust entering the slots during a stoppage will be trapped in the labyrinth instead of falling through into the hollow girder below. A small amount of clinker dust will inevitably all through the slots when the kiln and cooler are shut down. The dust is automatically cleared by the air flow at the next start-up

The high-efficiency COOLAX features
Fuel savings of 30-40 kcal/kg clinker!  30% less cooling air and 40% less air to be dedusted!  low overall power consumption!  effective and consistent cooling of clinker!  more stable high capacity kiln and cooler performance due to less dust circulation and no blowing through of cooling air!  low maintenance costs due to minimum wear on grate plate sand movable parts!  less red river tendency due to the Controlled Flow Grate system!  less snowman tendency!  less falling through of clinker!  small overall dimensions due to high specific grate load (up to60 t/m2 per 24 hours)

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