| 摘要 |
An apparatus and method for the measurement of solids feedrate in a gas-entrained solids flow conveyance system. The apparatus and method of the present invention include a vertical duct connecting a source of solids to the gas-entrained flow conveyance system, a control valve positioned in the vertical duct, and a capacitive densitometer positioned along the duct at a location a known distance below the control valved so that the solid feedrate, Q, of the gas entrained flow can be determined by Q=S rho phi VS where S is the cross sectional area of the duct, rho is the density of the solid, phi is the solid volume fraction determined by the capacitive densitometer, and vS is the local solid velocity which can be inferred from the konown distance of the capacitive densitometer below the control valve.
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