Patent FR-2959141-A1 (FR)
Title: Filtering column useful in effluent circuits of water treatment facility to generate power, comprises tube closed at each end by first and second connection units, and manual purge device, where connection units comprise coupler and sieve
Inventor: RODRIGUEZ DIDIER
IPC: B01D24/10
Filed: 2010-04-23
Abstract: The filtering column comprises a tube (2) closed at each end by first and second connection units (10), and a manual purge device. A circulating liquid is in contact with a powder. The connection units comprise a coupler and a sieve for retention of a powder inside the tube, and are formed by rings (12) adapted to be integrated to the tube and a movable hood (14, 16) with respect to the ring. The hood carries the coupler and the sieve, and is adapted to be pressed against the ring and to be integrated to the ring by a removable mounting device around the ring and hood. The filtering column comprises a tube (2) closed at each end by first and second connection units (10), and a manual purge device. A circulating liquid is in contact with a powder. The connection units comprise a coupler and a sieve for retention of a powder inside the tube, and are formed by rings (12) adapted to be integrated to the tube and a movable hood (14, 16) with respect to the ring. The hood carries the coupler and the sieve, and is adapted to be pressed against the ring and to be integrated to the ring by a removable mounting device around the ring and hood. The rings are screwed on the tube. Threads are arranged on an outside of the tube and an inside of the ring. Each ring comprises a hollow body of cylindrical form transversely connected to a flange (26), which has an end surface of contact in a plane transverse to the axis of the column at an opposite of the body. The ring of the first and second connecting units is identical. The hood has an end contact surface adapted to be pressed against the end contact surface of the corresponding ring. The contact surface of the ring has an annular imprint in which a seal is adapted to be housed in one part, where other part of the seal is adapted to fit in annular imprint formed in the contact surface of the corresponding hood. The seal comprises an annular flange having a diameter equal to a diameter of imprints, and an edge that radially extends to the annular flange, where the free end of the annular flange is folded. The sieve is fixed to the hood and pressed against the contact surface of the hood. The removable mounting device is formed by a hinged clamp, which comprises a clamping strip that has an inner surface of which a profile is a shape complementary to outer surfaces of the ring. The clamping strip is adapted to be tightened by screwing of a nut mounted on a pin that is pivotally mounted on the clamping strip. The tightening of the nut causes its displacement along the pin and linking of both ends of the clamping strip towards each other. The first connecting unit is positioned upstream of the tube, and comprises a purge system with a security valve, which is mounted at a free end of a vent extending transversely in the hood between an axial duct that connects the coupler and the sieve and the outside of the hood. The ring and the hood comprise a unit for coding so that the ring and the hood are fixed by the articulated clamping collar. The manual purge device is formed in the hood of the first connecting unit, and comprises an auxiliary duct, which is laid in the hood and opens at one end in the tube. An open air end is closed by a ring drilled in its center, and forms a seat for a movable axis adapted to move longitudinally under the effect of manual pressure on the projecting end of the hood and to move against a spring laid in the auxiliary duct. The axis is moved from a position against the seat in which it ensures the blockage of the air outlet and a position away from the seat for evacuating entire air present in the tube when the water filling is done at low pressure.