An air purifying system includes: a carbon dioxide remover including first and second spaces partitioned by a gas permeable membrane with 50 nm or less diameter micropores; a feed passage leading to-be-purified air from a room to the first space; a supply passage supplying clean gas having lower carbon dioxide and higher oxygen concentrations than the to-be-purified air to the second space; a discharge passage discharging, from the second space, mixed gas; a return passage leading purified air from the first space into the room, the purified air resulting from removing carbon dioxide from the to-be-purified air; and adjusting equipment adjusting a gas pressure in the first and second spaces to be substantially equal to each other. The to-be-purified air flows in the first space along a surface of the gas permeable membrane, and the clean gas flows in the second space along a surface of the gas permeable membrane.

A product that is an apparatus for removing debris from water containing such debris using a perforated plate, a backer plate, and a skimmer, positioned adjacent the back of the perforated plate to provide a means of removing debris from the perforated plate without scraping the debris from the perforated plate, the skimmer bar and the backer plate being synchronized in their movement.

The present invention relates to fluid filtering apparatuses, for applications such as water filtration, that utilizes screen filters, and in particular, to such a filtering apparatus having autonomously controlled self-cleaning capabilities. A self-cleaning filter apparatus including a filtering housing for filtering a fluid across a screen filter, a flushing chamber for housing filtered debris, and a control assembly for autonomously switching between filtering phases of the filter based on the differential pressure across the filter that is channeled along portions of the control assembly, the control assembly including a flush valve assembly, a three position two way (3/2) valve and a differential pressure (DP) switch.

The invention relates to a filter element (1, 31) for use as a particulate filter in a cooling circuit (100), in particular of an electrochemical energy converter, having a conical grid support structure (3, 33). The filter element features at a first axial end a supply opening (23, 49) for supplying a cooling medium to be filtered into the filter element (1, 31) and the grid support structure (3, 33) carries a filter medium (4, 34). The filter element (1, 31) has axially opposite the supply opening (23, 49) a funnel (16, 40) for axially discharging and collecting particulate impurities, and is closed at second axial end. The conical grid support (3, 33) structure tapers from the first axial end to the second axial end. An arrangement of a fuel cell (102) having a a cooling circuit (100) with the filter element is disclosed.

The invention relates to a filter element (1, 31) for use as a particulate filter in a cooling circuit (100), in particular of an electrochemical energy converter, having a conical grid support structure (3, 33). The filter element features at a first axial end a supply opening (23, 49) for supplying a cooling medium to be filtered into the filter element (1, 31) and the grid support structure (3, 33) carries a filter medium (4, 34). The filter element (1, 31) has axially opposite the supply opening (23, 49) a funnel (16, 40) for axially discharging and collecting particulate impurities, and is closed at second axial end. The conical grid support (3, 33) structure tapers from the first axial end to the second axial end. An arrangement of a fuel cell (102) having a a cooling circuit (100) with the filter element is disclosed.

A filtration apparatus includes a filtration tank; a layer of filtration media that filters supplied raw water by passing the raw water therethrough within the interior of the filtration tank; and a screw cleansing mechanism having a cylindrical outer cylinder which is provided within the filtration tank in a vertical orientation, a spiral shaped screw which is provided such that the long axis thereof extends in the longitudinal direction of the outer cylinder, and a screw driving member for rotating the screw, that scrubs and cleans filtration media by rotating the screw. The screw is in the shape of a coil spring.

A filter candle (1) in a backflush filter housing (2) has a cylindrical filter wall (3) and includes an internal hollow flushing element (8) divided into a flushing section (9) having a flushing port (10) for backflushing and a turbine section (11) for rotation of the flushing element. The flushing section tapers from a first end to a second end. The turbine section tapers from a first end to a second end and has turbine blades arranged on the outside. The first end of the flushing section is connected to the first end of the turbine section at a transition position (21). An outside of the flushing element forms a cylindrical restriction at the transition position so that the part of the cylindrical filter wall of the filter candle extending at the turbine section may be backflushed by means of fluid also driving the turbine.

A pressure measuring device configured as a multi-function device operable as a differential pressure switch (DPS); a differential pressure transducer (DPT); a pressure switch (PS); a pressure transducer (PT) providing readings of high and low pressure zones; a data recording logger; and a backwashing controller. The pressure measuring device may use at least two piezoelectric sensors operable to measure pressure attributes. The associated electronic hardware, processing unit, cables and pressure tubing are retrofittable and packaged in a molded case, with no moving parts with the electronic hardware fully coated to make the device reliable and resistant to extreme environmental conditions. The device is configured for remote access, enabling remote device configuration, maintenance and servicing. The device is further operable to communicate with various external devices: a tablet, a smartphone and the like as a user interface and further provides wired interface with a programmable logic controller (PLC) via RS-485 interface.

A pressure measuring device configured as a multi-function device operable as a differential pressure switch (DPS); a differential pressure transducer (DPT); a pressure switch (PS); a pressure transducer (PT) providing readings of high and low pressure zones; a data recording logger; and a backwashing controller. The pressure measuring device may use at least two piezoelectric sensors operable to measure pressure attributes. The associated electronic hardware, processing unit, cables and pressure tubing are retrofittable and packaged in a molded case, with no moving parts with the electronic hardware fully coated to make the device reliable and resistant to extreme environmental conditions. The device is configured for remote access, enabling remote device configuration, maintenance and servicing. The device is further operable to communicate with various external devices: a tablet, a smartphone and the like as a user interface and further provides wired interface with a programmable logic controller (PLC) via RS-485 interface.

The invention relates to preventing microplastics from the entering the environment. In particular the invention is directed to regenerating the efficiency of filters for removing microfibers from washing machine waste water, as well as waste from other appliances and other sources of effluent with entrained microplastics. A separator is therefore provided for separating microplastics from waste water comprising a chamber with an inlet and an outlet, at least one sieve structure forming a permeable barrier between the inlet and the outlet and a wash apparatus for washing the sieve structure.