| 摘要 |
Methods and apparatus for contacting solids and fluids are provided, where the fluids are allowed to traverse a downward path through a plurality of vertically arranged chambers in which said solids are located. The solids may be transferred upwardly through the chambers to assure optimal contact between the solids and the fluids. The transfer of the solids may be accomplished by fluidizing the solids and transporting them in a carrier fluid in a fluid flow loop. At the desired transfer location, the solids are prevented from completing passage through the fluid loop.
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