8. Industrial fluidized-bed heat transfer processes

Fluidized bed technology is used in a wide range of industrial heat treatment and thermochemical processing operations involving divided, inert or reactive solids. The main ones are listed below.

8.1 Gas-solid fluidized-bed heat exchangers

Thanks to the high transfer coefficients obtained in fluidized beds, they are used for rapid cooling of hot divided solids at the process outlet, in direct contact or via an immersed exchanger, in single or multi-stage systems. They are also used to recover waste heat from hot gases by preheating incoming charges.

Examples:

• hot alumina, at 950 ˚C after reaction, can be continuously cooled by means of coils immersed in a fluidized bed and traversed...

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Physics of energy