An indirect cooling vibratory conveyor is used to cool regenerated catalyst from 3000 degrees F to 300 degrees F. This is done using 180 degree F cooling water obtained from a previous cooling step in the regenerative process.
The manufacturer developed a curvilinear trough cross section to control relative thermal expansion growth. A series of draped and contoured linked metal curtains of sufficient weight to serve as flow inhibitors and distributors are employed to displace, spread, and mix the granular flow stream frequently, as it proceeds down the length of the cooling chamber. This produces a consistent temperature profile and uniform product discharge .
The conveyor system is totally enclosed and uses a natural frequency drive system with one low HP motor.
What is Indirect Cooling?
In indirect cooling, a hot material is conveyed along a vibratory conveyor trough surface cooled on its underside by a completely segregated cooling medium flow stream such that the cooling medium “Indirectly” absorbs the heat given up by the hot material as it moves along the length of the conveyor trough. (Indirect heating can occur on a similar basis with hot water, steam, or other heated medium.)
Counter-flow of the two flow streams is typically employed to improve heat transfer efficiency. Although water (or steam) is the most common cooling (heating) medium, aqueous solutions of ethylene glycol, heating oils, and other mediums are used as well.
Indirect cooling is usually applied when the material is oxygen sensitive or categorized as a hazardous waste.
Construction may be carbon steel, stainless, or other metals.