Apparatus and continuous method for the multistage treatment of finely divided solid substances with gases
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United States of America Patent
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Oct 13, 1987
Grant Date -
N/A
app pub date -
Sep 24, 1985
filing date -
Sep 29, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A continuous process for the successive treatment of finely divided solid materials which are fluidizable at low gas velocities wherein at least two different gases or gas mixtures are utilized and wherein the fluidized bed is held at a constant level in a countercurrent system. The individual gaseous treating materials are conveyed to the different zones of the treatment reactor whereby the cross-section in each zone is chosen so that an essentially constant linear stream velocity of the gas over the total length of treatment is attained whereby the length of the individual successive zones is determined so that in each zone the desired treatment process which is intended to be carried out runs through its desired course.
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