A filter device includes at least one filter housing (1) in which at least one filter element (21) is arranged. Inside the filter housing (1), the filter element separates a clean side (9) from an untreated side (13). On the clean side (9) of the filter housing (1) at least one storage unit (3) having at least one movable separating element (47) is connected. The separating element divides the storage unit (3) into two working chambers or pressure chambers (49) (43).

Devices, systems, and methods for concentrating a slurry are disclosed. A concentrator is utilized, including a cylindrical vessel containing a cylindrical filter and a screw. The cylindrical filter consists of a flat coil compression spring. The screw passes through the cylindrical filter. A slurry passed through the cylindrical vessel is concentrated. The slurry is conveyed by the screw along an interior of the cylindrical filter. Any two concentric coils of the spring are spaced such that the solid is prevented from passing between them. The slurry is concentrated to produce a concentrated slurry by restricting the product outlet such that a back pressure is created in the cylindrical vessel. The back pressure causes a portion of the liquid to pass between the concentric coils of the spring and out a fluid outlet. The concentrated slurry passes out a product outlet.

Devices, systems, and methods for concentrating a slurry are disclosed. A concentrator is utilized, including a cylindrical vessel containing a cylindrical filter and a screw. The cylindrical filter consists of a flat coil compression spring. The screw passes through the cylindrical filter. A slurry passed through the cylindrical vessel is concentrated. The slurry is conveyed by the screw along an interior of the cylindrical filter. Any two concentric coils of the spring are spaced such that the solid is prevented from passing between them. The slurry is concentrated to produce a concentrated slurry by restricting the product outlet such that a back pressure is created in the cylindrical vessel. The back pressure causes a portion of the liquid to pass between the concentric coils of the spring and out a fluid outlet. The concentrated slurry passes out a product outlet.

A transformational approach to water treatment is provided that incorporates membrane-free filtration with dynamic processing of the fluid to significantly reduce treatment times, chemical cost, land use, and operational overhead. This approach provides hybrid capabilities of filtration, together with chemical treatment, as the water is transported through various spiral stages.

A transformational approach to water treatment is provided that incorporates membrane-free filtration with dynamic processing of the fluid to significantly reduce treatment times, chemical cost, land use, and operational overhead. This approach provides hybrid capabilities of filtration, together with chemical treatment, as the water is transported through various spiral stages.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, which can be spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which can be elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, which can be spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which can be elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, in some embodiments spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which in some embodiments are elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, in some embodiments spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which in some embodiments are elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.

An Archimedes screw plant for separating slurry includes a tubular sifting device; a slurry feeding device; a device for evacuating the liquid fraction; and a device for evacuating the substantially dry separated solid. The device includes an upper compaction chamber of the separated solid where a solid plug of product is formed. In addition, the tubular sifting device has an upper opening being provided with an auxiliary contrast element for forming the solid plug of product.