Patent ID: 11904280
Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. Filtration system (20), comprising
a tank (40) filled at least partly with water to be filtered, and at least one filtration module (30),
the at least one filtration module (30) comprising at least one filter membrane (10) for filtering the water comprising a substrate (12) which is penetrated by at least one capillary (16), and
at least one filtrate pipe (32) for drawing filtered water out of the tank (40), whereat the at least one filtration module (30) is arranged in the tank (40) such that the at least one filter membrane (10) is submerged at least partly in the water to be filtered, wherein:
the at least one filtration module (30) is designed and arranged such that water to be filtered flows into the at least one capillary (16) and from the at least one capillary (16) through the substrate (12) into the filtrate pipe (32);
the at least one filter membrane (10) has a cylindrical shape extending in an axial direction (x), with the at least one capillary (16) also extending in the axial direction (x);
the at least one filtration module (30) comprises a casing (34) extending in the axial direction (x) and surrounding the at least one filter membrane (10) and the at least one filtrate pipe (32) in circumferential direction;
the at least one filtration module (30) comprises first and second sealings (36), wherein the first and second sealings (36) are arranged, respectively, within the casing (34) near a lower front side (15) and near an upper front side (15) of the at least one filter membrane (10), wherein each of the first and second sealings (36) surrounds the at least one filter membrane (10) and the at least one filtrate pipe (32) in a circumferential direction;
the lower front side (15) and the upper front side (15) of the at least one filter membrane (10) are free, respectively, from the first and second sealings (36) such that water can enter the at least one capillary (16) in the axial direction (x) from the lower front side (15) and the upper front side (15);
the at least one filtration module (30) is arranged in the tank (40) such that at least one of the lower front side (15) and the upper front side (15) of the at least one filter membrane (10) is in contact with the water;
the filtration system (20) is configured to draw water from the lower front side;
a suction pump is provided for drawing water through the filtrate pipe (32) of the at least one filtration module (30) out of the tank (40); and
the suction pump is connected to the at least one filtrate pipe of the at least one filtration module or to at least one collecting pipe, the suction pump is configured to generate negative pressure, being smaller than atmospheric pressure, to draw water through the at least one filtrate pipe and through the at least one filter membrane out of the tank.