A pipeline strainer is provided having a cavity, a screen assembly disposed in the cavity, the screen assembly having an open first end and an open second end and a screen axis extending from the open first end to the open second end, a fluid inlet arranged at the open first end of the screen assembly, such that the fluid inlet is open to an interior of the screen assembly, a fluid outlet adjacent the open first end of the screen assembly. The fluid outlet is open to a straining surface of the screen assembly. A fluid axis extends from the fluid inlet to the fluid outlet where the fluid axis crosses the screen axis at or near the fluid inlet.

A pipeline strainer is provided having a cavity, a screen assembly disposed in the cavity, the screen assembly having an open first end and an open second end and a screen axis extending from the open first end to the open second end, a fluid inlet arranged at the open first end of the screen assembly, such that the fluid inlet is open to an interior of the screen assembly, a fluid outlet adjacent the open first end of the screen assembly. The fluid outlet is open to a straining surface of the screen assembly. A fluid axis extends from the fluid inlet to the fluid outlet where the fluid axis crosses the screen axis at or near the fluid inlet.

Water or wastewater filtration systems and processes have a filter tank having a floor and sidewall defining a filtration zone, an influent conduit, and an effluent conduit. One or more filtration members in the tank having filter media, and one or more cleaning members adjacent at least some portions of the filter media. Generating an effluent stream by generating a pressure differential across submerged portions of the filtration media, causing water in the influent to flow from outside to inside the submerged portions of the filter media. A prime mover rotates the filtration members. A blower and chamber for creating a reduced pressure condition in each of the cleaning members when they are non-submerged, the chamber receiving wet solids removed from non-submerged, wet solids-laden portions of the filter media by the non-submerged cleaning members subsequent to submerged, fouled portions of the filter media being rotated out of the filtration zone.

Water or wastewater filtration systems and processes have a filter tank having a floor and sidewall defining a filtration zone, an influent conduit, and an effluent conduit. One or more filtration members in the tank having filter media, and one or more cleaning members adjacent at least some portions of the filter media. Generating an effluent stream by generating a pressure differential across submerged portions of the filtration media, causing water in the influent to flow from outside to inside the submerged portions of the filter media. A prime mover rotates the filtration members. A blower and chamber for creating a reduced pressure condition in each of the cleaning members when they are non-submerged, the chamber receiving wet solids removed from non-submerged, wet solids-laden portions of the filter media by the non-submerged cleaning members subsequent to submerged, fouled portions of the filter media being rotated out of the filtration zone.

The present invention provides a multi-structure filtration device for filtering, separating, and dehydrating foreign substances in water, the multi-structure filtration device comprising: a filtration tank filled with filtration target fluid inside; a filtration device unit having a cylindrical double drum structure, installed in the filtration tank so that a part of the filtration device unit is submerged in the filtration target fluid, and including two or more filters having different mesh sizes that are respectively wound on an inside and an outside of the filtration device unit, and one or more washing modules washing foreign substances attached to the filter wound on an outside of the filtration device unit. Accordingly, the multi-structure filtration device can have excellent filtration performance by double-filtering the target fluid using two or more filters, can operate in an eco-friendly manner by recycling filtered water and effectively washing the filters using the filtered water without separate chemicals, can increase the durability of the filters, and can reduce the washing and processing cost by reusing the filters.

A filter device for a water-bearing domestic appliance has a flow-through filter housing with waste water inlet, filtered water outlet and filtrate outlet, at least one panel filter and a mounting therefor in the filter housing, wherein the panel filter has a mesh width and an angle to the horizontal, and a filtrate chamber in the filter housing for collecting filtrate. The panel filter, the waste water inlet and the filtered water outlet are arranged relative to one another such that a flow direction for water from the waste water inlet to the filtered water outlet passes through the panel filter. The filtrate chamber is accessible via the filtrate outlet for removing the filtrate from the filtrate chamber, in particular by backwashing. The at least one panel filter is variable in shape to change its mesh width, and/or an angle of the at least one panel filter to the horizontal can be altered by movement of the panel filter, in particular rotation.

In one aspect, a modular filter assembly for filtering fluid that flows in a flow direction therethrough is disclosed. The assembly includes a first housing section having a first filter element; a second housing section having a second filter element; and a connector disposed between the first and second housing sections. A housing includes the first housing section, the connector, and the second housing section. The flow direction is through the first and second filter elements in series.

Water or wastewater filtration systems and processes have a filter tank having a floor and sidewall defining a filtration zone, an influent conduit, and an effluent conduit. One or more filtration members in the tank having filter media, and one or more cleaning members adjacent at least some portions of the filter media. Generating an effluent stream by generating a pressure differential across submerged portions of the filtration media, causing water in the influent to flow from outside to inside the submerged portions of the filter media. A prime mover rotates the filtration members. A blower and chamber for creating a reduced pressure condition in each of the cleaning members when they are non-submerged, the chamber receiving wet solids removed from non-submerged, wet solids-laden portions of the filter media by the non-submerged cleaning members subsequent to submerged, fouled portions of the filter media being rotated out of the filtration zone.

Provided are an extraction structure, an extraction module, and a liquid pretreatment device relating to the liquid component testing technical field. The extraction structure comprises a cavity and a first pore passage. The extraction module comprises an extraction module body, successively bottom up, including a first cavity provided therein with a second filter layer, a first pore passage provided therein with a first filter layer, and a second cavity provided therein with an extractant layer and a porous filter disc; the first and second filter layers contain therein an expansive agent; and the diameter of the first filter layer is smaller than that of the second filter disc. The liquid pretreatment device comprises a storage tank, a transfer device and the extraction module. Between the transfer device and the extraction module is provided a filter membrane for filtering and supporting.

Provided are an extraction structure, an extraction module, and a liquid pretreatment device relating to the liquid component testing technical field. The extraction structure comprises a cavity and a first pore passage. The extraction module comprises an extraction module body, successively bottom up, including a first cavity provided therein with a second filter layer, a first pore passage provided therein with a first filter layer, and a second cavity provided therein with an extractant layer and a porous filter disc; the first and second filter layers contain therein an expansive agent; and the diameter of the first filter layer is smaller than that of the second filter disc. The liquid pretreatment device comprises a storage tank, a transfer device and the extraction module. Between the transfer device and the extraction module is provided a filter membrane for filtering and supporting.