Filter-box and a retrievable subsea filter module with a filter-box

A subsea filter-box with a plurality of longitudinal pressure-vessels forming at least one group of longitudinal pressure-vessels, wherein each pressure vessel includes a membrane, a first end section and a second end section;

• wherein each first end section, includes a first side face and a first end section end face;
• wherein each second end section, includes a second side face and a second end section end face;
• wherein the first end section end face faces away from the second end section end face;
• at least one feed liquid inlet on the first end section side face;
• at least one retentate outlet and at least one permeate/filtrate outlet on the second end section side face;
• the subsea filter-box comprising:
• a first support plate with a plurality of fixing geometries, each supporting a first end section;
• a second support plate with a plurality of fixing geometries, each supporting a second end section, whereby each of the plurality of pressure-vessels extends between a fixing geometry on the first support plate and a fixing geometry on the second support plate;
• wherein the at least one group of pressure-vessels includes at least:
• one entry pressure-vessel with at least one feed liquid outlet on the first end section side face;
• at least one intermediate pressure-vessel with at least one feed liquid outlet on the first end section side face;
• at least one permeate inlet on the second end section side face;
• at least one retentate inlet on the second end section side face, adjoining and in liquid connection with the entry pressure-vessel;
• one end pressure-vessel, adjoining and in liquid connection with an intermediate pressure-vessel;
• and
• a clamp structure, clamping the first support plate and the second support plate to the plurality of pressure-vessels.