An electrostatics-enhanced air filter that produces an electrostatic attraction for dust particles using an electrical ground or electrically charged filter is disclosed. The present invention takes advantage of the mirror-charge effect that spontaneously induces an opposite and attractive charge on the filter that pulls in dust particles. A fibrous filter medium pad is impregnated with a liquidus solution, which is a conductive aqueous electrolyte solution which would capture dust particles. Charges on dust particles would be drained off through the liquidus solution to the ground, preventing the effective electrical potential of the filter from changing. The liquidus solution also contains a detergent that keeps the filter clear of oily air contaminants to maintain conductivity through the filter service life. The liquidus solution contains a wetting agent for engulfing dust particles therein/thereon. The liquidus solution also contains a hygroscopic agent that prevents it from partially drying during its use.

A tube shaped air filter element for a fuel cell vehicle. The air filter element comprises a pair of circumferentially extending ridges on a first inner circumferential envelope surface, each of the pair of ridges protrudes towards a geometric centre axis of the air filter element and is configured to engage with an axially protruding portion of a filter housing.

A tube shaped air filter element for a fuel cell vehicle. The air filter element comprises a pair of circumferentially extending ridges on a first inner circumferential envelope surface, each of the pair of ridges protrudes towards a geometric centre axis of the air filter element and is configured to engage with an axially protruding portion of a filter housing.

A system for cleaning a filter mounted over an intake opening of an air handling unit. A conduit is secured to an elevated location of the unit and includes a plurality of spaced nozzles arrayed against the filter. A supply tube connects to the conduit for supplying a pressurized fluid through the nozzles in order to clear debris from an exterior of the mounted filter. The pressurized fluid includes either of a liquid (typically water) or a compressed air provided from any of a source or a supply reservoir. A pump is incorporated into the supply tube for pressurizing the fluid. A filter incorporated into the supply tube filters the pressurized fluid prior to delivery to spray issuing conduit. A processor/controller is provided in combination with an arrangement of control valves for providing timed sequenced washing of the filters. A collection basin is provided for recycling used liquid for re-delivery and re-use through the spray delivery conduits.

A system for cleaning a filter mounted over an intake opening of an air handling unit. A conduit is secured to an elevated location of the unit and includes a plurality of spaced nozzles arrayed against the filter. A supply tube connects to the conduit for supplying a pressurized fluid through the nozzles in order to clear debris from an exterior of the mounted filter. The pressurized fluid includes either of a liquid (typically water) or a compressed air provided from any of a source or a supply reservoir. A pump is incorporated into the supply tube for pressurizing the fluid. A filter incorporated into the supply tube filters the pressurized fluid prior to delivery to spray issuing conduit. A processor/controller is provided in combination with an arrangement of control valves for providing timed sequenced washing of the filters. A collection basin is provided for recycling used liquid for re-delivery and re-use through the spray delivery conduits.

The present invention relates to a novel hydraulic cleaning apparatus for a particulate matter reduction device that enables rapid drying and differential pressure measurement, effectively cleaning, drying, and measuring differential pressure of particulate matter reduction devices in diesel vehicles. When an operator places the particulate matter reduction device (1) on the support case (21) and inputs a cleaning command via the input unit (37), the control unit (36) automatically controls the water supply pump (25), ring blower (26), three-way valve (27), and heater (31) to supply cleaning water and air to the particulate matter reduction device (1). This automated process cleans and dries the device, making operation very simple. Additionally, the differential pressure gauge (38) in the main body (10) measures the differential pressure of the particulate matter reduction device (1), enabling easy determination of whether the particulate matter reduction filter (3) has been sufficiently cleaned.

The present invention relates to a novel hydraulic cleaning apparatus for a particulate matter reduction device that enables rapid drying and differential pressure measurement, effectively cleaning, drying, and measuring differential pressure of particulate matter reduction devices in diesel vehicles. When an operator places the particulate matter reduction device (1) on the support case (21) and inputs a cleaning command via the input unit (37), the control unit (36) automatically controls the water supply pump (25), ring blower (26), three-way valve (27), and heater (31) to supply cleaning water and air to the particulate matter reduction device (1). This automated process cleans and dries the device, making operation very simple. Additionally, the differential pressure gauge (38) in the main body (10) measures the differential pressure of the particulate matter reduction device (1), enabling easy determination of whether the particulate matter reduction filter (3) has been sufficiently cleaned.

A filter media includes a membrane and a protective scrim secured to a surface of the membrane. The membrane includes fibres of a first polymer having a diameter less than 1 micron, and the scrim includes fibres of a second polymer. The first polymer is hydrophobic and has a contact angle greater than 90 degrees, and the second polymer is hydrophilic and has a contact angle less than 90 degrees.

A filter media includes a membrane and a protective scrim secured to a surface of the membrane. The membrane includes fibres of a first polymer having a diameter less than 1 micron, and the scrim includes fibres of a second polymer. The first polymer is hydrophobic and has a contact angle greater than 90 degrees, and the second polymer is hydrophilic and has a contact angle less than 90 degrees.

Systems and methods for methods and systems for reducing contaminants in a feed stream are disclosed. Prior to reaching or upstream from one or more compressors, solid foulant is filtered from a feed stream. The compressor may further filter the feed stream. By reducing the solid foulant entering the one or more compressors, performance and life span of the one or more compressors also can be increased.