Coolers and heat recovery

In mineral processing plant, the temperatures of discharged products from thermal processing are high. In order to lower that temperature, or to recover some heat, or both, coolers are

used. Most of the coolers are inversely working dryers, however, with a higher capacity per installed unit.

Coolers of rotating drum type

Normally there are three basic designs:

• Air Swept Coolers built similar as a counter flow direct heat rotary dryer, where hot gasses are replaced with ambient air

• Water cooled shell coolers where the drum shell is cooled with water or is submerged in a pool of water.

• Water tube coolers having the same design as a steam tube dryer, where the steam is replaced with cool water

Coolers of fluid bed type

The principles of fluid bed can be used also for cooling purposes. In this case the

fluid bed is cooled by internal water pipes.

Ash Cooling

Circulating Fluidized Bed Boiler

Coolers and heat recovery

Thermal processing is a question of limiting the energy input for each part of the operation. This is the strongest argument (together with environmental issues) in a competitive situation for systems selection. The system with the best heat balance has probably also the best heat recovery system utilizing the energy released from cooling.
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Sinoninetechnology team