抄録
A new technique for measuring the flow of granular materials continuously is described. Slot Flow Metering utilizes the flow from vertical slots to determine flow rate. A Slot Flow Meter (SFM) consists of a hopper with one or more vertical slots in its sides supported by a means for weighing the hopper's contents, eg. a load cell. Solids flow rate can be correlated against the apparent weight of solids in the hopper.
Recent experimental and theoretical work on the flow of granular materials from vertical slots is reviewed and a simple in-situ calibration technique is described. This is tested against direct calibration (bucket and stop-watch) with a pilot-scale unit located in an experimental circulating fluidized bed. The industrial prototype, installed in a Urea plant, is described.
