| 摘要 |
A system and method for continuously transporting fine solids in dense phase includes a blow bottle having an upper inlet for receiving fine solids under pressure, an intermediate inlet for receiving process media, and a lower inlet for receiving fluidizing media. The media is preferably air, but other gases or inert gases may be used. The fine solids are conveyed from a feed hopper through a variable speed rotary feeder into a drop chute having an expansion joint and thereafter through a constant speed rotary feeder to the inlet of the bottle. The variable speed feeder controls the rate of fine solids being discharged in dense phase from the bottle. The fluidizing media fluidizes the fine solids in the bottle, and the process media conveys the fine solids out of the bottle in continuous, dense phase flow to an outlet conduit. A signal corresponding to the weight of the bottle is provided to a control valve connected in the process media supply line to maintain a constant solids level inventory in the bottle. A higher sensed weight opens the control valve to admit more process media to the bottle, thus increasing the pressure in the bottle and the rate at which the solids are discharged therefrom. The weight of solids level inventory reduces to the desired value. A lower sensed weight causes the control valve to close, less process media is admitted to the bottle, and the solids level inventory increases to the desired value.
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