Filter back-flushing control for liq.-solid filtration systems - using differential pressure monitoring corrected for flow-rate and viscosity variation

摘要

Procedure for back-flushing a filtration medium, depending on the pressure difference across the filter medium, in which (a) the pressure differential across the medium is continuously monitored, (b) the fluid temp. and/or flowrate is continuously determined, (c) the characteristic pressure differentials for the filtration medium at different fluid temp./flowrates, and particularly at nominated temp./flowrates, are stored for reference, (d) the pressure differential determined at a first temp. is compared with the pressure differential measured at a nominated flow temp. or flowrate, in order to calculate a correction coefft.. ADVANTAGE - Efficient detection of clogging etc..