METHOD AND DEVICE FOR MONITORING THE MASS FLOW OF PARTICULATE SOLIDS FLOW IN A PNEUMATIC PIPELINE

摘要

A device for monitoring the mass flow of a particulate solids flow in a pneumatic pipeline (10, 12) comprises a measuring chamber (16) and an impact body (34, 34'). Through an inlet connection (18) the particulate solids flow is blown as a compact solid/gas jet onto the impact body (34, 34'), so as to impact thereon with substantially its whole cross-section. An acoustic transducer (52) is associated with the impact body (34, 34') for sensing structure-born acoustic waves, which are generated by said compact solid/gas jet impacting onto said impact body (34, 34'), and transforming them into an output signal. Signal processing means (60) process the output signal so as to derive therefrom a value that is representative of the mass flow rate of the particulate solids flow.