Weir for mobile sampling of fluidised solids - comprises gutter forming flow into square cross section to form column for slot in sampling extractor

摘要

The straight gutter (1) has a semicircular cross section at the inlet end for the liquid flow. The cross section is progressively deformed to form a rectangular cross section at the outlet. This forms the liquid (2) into a jet of square or rectangular cross section travelling at a partic. speed. A second gutter (4,5) is located downstream and has a slightly larger cross section than that of the liquid jet to maintain the flow in a rectangular cross section as it arrives tangentially on the gutter. It is maintained in position by centrifugal action as it falls vertically as a column into a slot (6) for extraction for sampling.