Filter for purifying a fluid containing ferromagnetic particles

A filter for purifying water containing ferromagnetic particles and being at high pressure and at high temperature from a cooling circuit of a nuclear reactor cooled with water, said filter comprising

• a cylindrical envelope having a vertical axis of symmetry;
• upper and lower plates closing the ends of said envelope, at least the lower plate being convex and said upper plate being provided with an opening;
• a bed of steel beads within said envelope;
• means provided at the periphery of said envelope for magnetizing said beads;
• a plug disposed in the opening in said upper plate to provide access to the upper level of said bed of beads situated immediately under said upper plate;
• at least one support plate for supporting said beads in said envelope, said support plate being provided with holes, being arranged transversely to said axis of said envelope, and being spaced from said lower plate so that a free space is created between said support plate and said lower plate;
• an inlet pipe for water to be purified passing through said lower plate at a location different from the central part of said lower plate and opening into said free space;
• and
• an outlet pipe for purified water passing through said lower plate and extending substantially vertically through said bed of beads and coming into engagement with said plug immediately under said upper plate, said outlet pipe being closed at its upper part and being provided with holes in the lateral surface of the part thereof located above said bed of beads for the passage of water, said beads occupying the major part of the internal volume of said envelope and said water to be purified being equally distributed in all the sections of the filter in the free space under said lower plate.