Method and apparatus for producing a coal/water mixture for combustion in a fluidized bed unit
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United States of America Patent
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Jul 25, 1989
Grant Date -
N/A
app pub date -
May 24, 1988
filing date -
Jun 3, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for producing a coal/water mixture for combustion in a fluidized bed unit. To produce a hydraulically transportable coal/water mixture, crushed raw coal is preliminarily mixed with water in a first stage. This mixture is final mixed in a second mixing stage. The fine grain-size fraction required for the hydraulic transport is generated in the first mixing stage. The viscosity of the mixture present in the second mixing stage is determined, and as a function thereof additional water is added to the mixture in the second mixing stage, and/or the mixing process in the first mixing stage is altered in order to alter the fine grain-size fraction.
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