Process for automatic cleaning of a microfiltration or ultrafiltration unit and plant for carrying out the process.

摘要

Plant for automatic unblocking of an ultrafiltration or microfiltration unit, comprising a module made up of an elongate cylindrical vessel (22) provided at its ends with an entry manifold (24) and an exit manifold (26) for the flow at pressure P1 of the liquid phase to be filtered, and at least one filter membrane (28), also of cylindrical shape, arranged axially to the vessel (22) and defining with the latter a downstream volume (30) intended for the filtrate flow, this downstream volume (30) communicating via two openings, one the downstream exit (32) and the other the downstream entry (34), with the outside of the vessel, characterised in that it comprises a filtrate circuit (36) established from the downstream exit (34) towards the downstream entry (32), this circuit (36) being provided in series with a pump (38) at a pressure which is periodically modulated so that the maximum amplitude of this pressure is slightly greater than the pressure P1, the pipework for recovering (42) the filtrate produced by the plant being connected directly to this filtrate circuit (36). <IMAGE>