Method of operating hydrocyclone systems by adding water to maintain flow rates

摘要

PCT No. PCT/GB91/00309 Sec. 371 Date Mar. 16, 1993 Sec. 102(e) Date Mar. 16, 1993 PCT Filed Feb. 28, 1991 PCT Pub. No. WO91/12893 PCT Pub. Date Sep. 5, 1991.In a method of operating a bank of parallel hydrocyclone separators for deoiling water, each separator has a mixture inlet, an overflow oil outlet and an underflow water outlet. The flow through at least one separator is sensed, either directly, or indirectly by sensing the pressure difference across the separator. If the flow approaches a threshold below which there is insufficient flow for satisfactory operation, an additional supply of water is fed to the mixture inlet fo the separators.