Process for drying organic solid materials using steam

Details Process for drying organic solid materials using steam Process for drying organic solid materials using steam

C - Chemistry, Metallurgy

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C10L 5/40 (2006.01) C10F 5/00 (2006.01) C10L 9/00 (2006.01) F26B 7/00 (2006.01)

Patent

CA 1142755

A b s t r a c t The process for drying as well as for, if desired, modification of the structure of organic solid material, such as for example brown coals, is using steam as the drying agent. The organic solid materials have their upper grain size limited to approximately 50 mm and are suspended in water and heated under a pressure exceeding atmospheric pressure. It is already when preparing this suspension that a first pre-drying is effected. In the following the selected operating pressure exceeding atmospheric pressure is maintained or increased and the suspension is centri- fuged in at least one further drying stage. In all drying stages succeding the stage in which the suspension is pre- pared heating is effected by supplying steam. The suspended solid materials are continuously discharged from the last drying stage maintained under a pressure exceeding atmospheric pressure and pressure-released.

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