A water softening device for use for a pet is provided, comprising: a first chamber having a shape of a hollow container; a second chamber having a shape of a hollow container, the second chamber being detachably attached to an upper section inside the first chamber; and a filter cartridge having a plurality of openings and containing an ion exchange resin therein, the filter cartridge being detachably attached to a bottom section of the second chamber and positioned to protrude from the bottom section of the second chamber to a lower section inside the first chamber. The second chamber is configured to receive and contain first water including tap water, and the lower section inside the first chamber is configured to receive and contain second water that is the first water after passing through the filter cartridge based on gravity.

A water filter medium container includes a removable upper cover and a removable lower cover. The container includes a tube defining a filter medium compartment operative to receive a replaceable filter medium. A first containment element may be placed between the upper cover and the tube. A second containment element may be placed between the lower cover and the tube. The water filter medium container may be adapted to be placed in a water container.

A water filter medium container includes a removable upper cover and a removable lower cover. The container includes a tube defining a filter medium compartment operative to receive a replaceable filter medium. A first containment element may be placed between the upper cover and the tube. A second containment element may be placed between the lower cover and the tube. The water filter medium container may be adapted to be placed in a water container.

A process for the separation of electrolyte from the carbon in a solid carbon/electrolyte cathode product formed at the cathode during molten carbonate electrolysis. The processes allow for easy separation of the solid carbon product from the electrolyte without any observed detrimental effect on the structure and/or stability of the resulting solid carbon nanomaterial.

A process for the separation of electrolyte from the carbon in a solid carbon/electrolyte cathode product formed at the cathode during molten carbonate electrolysis. The processes allow for easy separation of the solid carbon product from the electrolyte without any observed detrimental effect on the structure and/or stability of the resulting solid carbon nanomaterial.

A filter structure has a main body and a stirring member. The main body has a hollow containment space filled with a filtering material. A filtering mesh is disposed at a bottom side of the containment space. A first purifying opening is disposed at a top end of the main body. A second purifying opening is disposed at a lower sidewall position of the main body above the filtering mesh. A first cleaning opening and a second cleaning opening are disposed on the main body and respectively coupled to a first and second inner pipe. An outlet is disposed at a bottom of the main body. The stirring member has an upper cover corresponding to the first purifying opening of the main body. The upper cover further has a driving arm and a connecting rod, and the connecting rod has a plurality of stirring rods.

A filter structure has a main body and a stirring member. The main body has a hollow containment space filled with a filtering material. A filtering mesh is disposed at a bottom side of the containment space. A first purifying opening is disposed at a top end of the main body. A second purifying opening is disposed at a lower sidewall position of the main body above the filtering mesh. A first cleaning opening and a second cleaning opening are disposed on the main body and respectively coupled to a first and second inner pipe. An outlet is disposed at a bottom of the main body. The stirring member has an upper cover corresponding to the first purifying opening of the main body. The upper cover further has a driving arm and a connecting rod, and the connecting rod has a plurality of stirring rods.

Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring. Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.

Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring. Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.

Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring. Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.