Patent ID: 8496118

Claim:
A device for the tangential filtration of a fluid to be processed, intended to be divided into a filtrate and a retentate, where the device includes, in an outer case ( 2 ): at least one input (E) for the fluid to be processed, at least one output (S) for removal of the retentate, a series of filtration elements ( 3 ) of tubular form lying parallel to each other and passing through a positioning plate ( 4 ) in a sealed manner at each of their ends, where the filtration elements ( 3 ), each with at least one circulation channel for the fluid to be processed and effecting the filtration of the said fluid, with a view to obtaining, at the peripheral surface of the filtration elements, the discharge of the filtrate intended to be recovered in a collection receptacle ( 6 ) located between the positioning plates ( 4 ) and the outer case ( 2 ), have: least one output ( 7 ) for the filtrate, communicating with the filtrate collection receptacle ( 6 ), a first communication chamber ( 11 ) into which one of the ends of the filtration elements opens, and in which separation resources are fitted ( 15 ) in sealed contact with the adjacent positioning plate ( 4 ), in order to divide the said chamber into first (V 1 ) and second (V 2 ) volumes respectively formed inside and outside of the separation resources and communicating respectively with a first series (s 1 ) and a second series (s 2 ) of filtration elements ( 3 ) forming go and return circuits of a circulation loop for the fluid to be processed, where the separation resources include a communicating passage ( 24 ) between the second volume (V 2 ) and the first volume (V 1 ), inside which is fitted a turbine ( 23 ) of a circulation pump, fitted with a drive axle ( 25 ) lying outside the first chamber ( 11 ) to be connected to a drive motor ( 26 ), and a second communication chamber ( 12 ) into which opens the other end of the filtration elements, providing a communication path for the fluid to be processed, between the filtration elements of the first series (S 1 ) and those of the second series (s 2 ), characterized in that the input (E) for the fluid to be processed opens into the first communication chamber ( 11 ) of the outer case upstream of the turbine ( 23 ) and between the turbine ( 23 ) of the circulation pump and the filtration elements ( 3 ) of the series forming the return circuit of the circulation loop.