A fluid transport assembly includes a substantially cylindrical shell having a first closed end and a second closed end and a tube extending from the first closed end to the second closed end. The tube is substantially aligned with an axis of the shell and provides a passage through the shell. The fluid transport assembly also includes a series of concentric cylindrical filters positioned in the cylindrical shell and extending from the first closed end to the second closed end. The series of concentric cylindrical filters defines an input compartment between the filters and the tube and an output compartment between the filters and the cylindrical shell. The series of concentric filters is structured to remove contaminants from a fluid as the fluid flows through the series of concentric filters from the input compartment to the output compartment.

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.

According to various aspects and embodiments, a system and method for two-stage filtration is provided. The system includes an inlet fluidly connectable with wastewater, a first stage filter assembly that is fluidly connectable with the inlet and has a rotary drum with a filter surface configured for radially inward fluid flow, a second stage filter assembly that is fluidly connectable with the first stage filter and has a plurality of filter discs configured for radially outward fluid flow, and an outlet fluidly connectable with filtrate generated by the second stage disc filter assembly.

A consumption-free high-efficiency filter includes a tank body provided with a liquid outlet, a filter closure head provided with a liquid inlet and fixedly mounted with the tank body, a first group of support rings and second group of support rings that are respectively fixedly mounted at an upper end of the tank body and a lower end of the tank body, an upper cross support frame and a lower cross support frame, a mandrel, a first sliding bearing and a second sliding bearing used for rotatably mounting an upper end of the mandrel and a lower end of the mandrel, and a set of filter elements. Each filter element includes a filter element sleeve fixedly mounted on the mandrel, a blade and a filter loop.

A consumption-free high-efficiency filter includes a tank body provided with a liquid outlet, a filter closure head provided with a liquid inlet and fixedly mounted with the tank body, a first group of support rings and second group of support rings that are respectively fixedly mounted at an upper end of the tank body and a lower end of the tank body, an upper cross support frame and a lower cross support frame, a mandrel, a first sliding bearing and a second sliding bearing used for rotatably mounting an upper end of the mandrel and a lower end of the mandrel, and a set of filter elements. Each filter element includes a filter element sleeve fixedly mounted on the mandrel, a blade and a filter loop.

Disclosed are a capture device for purifying air, a purification device, and an air purifier. The capture device for purifying air includes: a housing and a capture assembly. The housing is provided with an air inlet and an air outlet, wherein a cavity, in communication with the air inlet and the air outlet, is defined inside the housing; and the capture assembly is arranged in the cavity, and is located between the air inlet and the air outlet. The capture assembly includes a first rotating disk, a second rotating disk and a cylinder, wherein both the first rotating disk and the second rotating disk are rotatable and rotate in opposite directions; and the cylinder is disposed between the first rotating disk and the second rotating disk.

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.

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.

A movable seal for interfacing between a first surface and a second surface includes a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the non-floating portion is coupled to the first surface by nesting in a groove on the first surface, and wherein the non-floating portion forms a seal between the first and second surfaces when the first surface moves relative to the second surface in a first direction, and wherein the non-floating portion does not form a seal between the first and second surfaces when the first surface moves relative to the second surface in a second opposite direction.

A movable seal for interfacing between a first surface and a second surface includes a floating portion attached to a non-floating portion by a flexible coupling portion, wherein the non-floating portion is coupled to the first surface by nesting in a groove on the first surface, and wherein the non-floating portion forms a seal between the first and second surfaces when the first surface moves relative to the second surface in a first direction, and wherein the non-floating portion does not form a seal between the first and second surfaces when the first surface moves relative to the second surface in a second opposite direction.