An air pollution prevention system is disclosed and includes at least one detection and processing device and at least one cleaning device. The detection and processing device includes a nano actuator, a nano photodetector, a carbon nanotube and a microprocessor, which are integrated as a single chip device through semiconductor manufacturing processes. The detection and processing device configured to detect a particulate matter and gas contained in an air pollution source and output a control command. The cleaning device includes a nano blower, a nano filter and a controller. The cleaning device receives the control command outputted from the detection and processing device through the controller to control the nano blower for guiding the air pollution source to flow through the nano filter for filtration.

The technology disclosed herein relates to a tank vent having a housing and a pleated, vapor-permeable microporous membrane. The housing defines a first vapor passageway configured for direct communication with a tank interior and a second vapor passageway configured for direct communication with the atmosphere. The housing also defines a tank mounting surface is mountable to a tank housing and a media mounting surface. The microporous membrane is sealed to the media mounting surface and defines a tubular structure such that the first vapor passageway and the second vapor passageway are in communication through the microporous membrane. Other embodiments including methods are also disclosed.

A chemical liquid manufacturing apparatus is provided. The manufacturing apparatus includes at least one filtration medium selected from an ion exchange medium and an ion medium, and a temperature control unit configured to control the temperature of a material to be processed by the at least one filtration medium. A method of manufacturing a chemical liquid using the apparatus is also provided.

The various embodiments herein provide a filter assembly for a portable fan comprising a holder base and a filter. The holder base comprises a base strip attached to a body of the portable fan through a fastening mechanism. At least two base strips are connected on opposite ends of the body of the portable fan. The holder base further comprises at least two vertical stoppers, at least two sliding brackets, and at least two slots. The at least two vertical stoppers are attached at vertically opposite ends of the base strip. The at least two sliding brackets are attached long a length of the base strip. The at least two slots are provided at a suitable place on the base strip for the fastening mechanism. The filter is a semi permeable membrane fixed into the base strip through the at least two sliding brackets.

A valve filter used for inflatable having infill inside. The valve filter has a filter body to stop the infill from escaping from the inflatable, and a patching sleeve to be attached on the inflatable or air valve of the inflatable.

An environmental control assembly includes a housing including a base layer, a diffusor layer, and an interior space at least partially formed by the base layer and the diffusor layer. The environmental control assembly further includes a desiccant positioned within the interior space and an inlet filter that is formed from a cutout in the base layer that is covered by the diffusor layer.

A vent assembly (100) has a vent body (110) defining a first end (104) and a second end (106), a central axis extending from the first end to the second end, and an inner surface defining a cavity. A first retainer extends across the cavity towards the first end of the vent body, and a second retainer (140) extends across the cavity towards the second end of the vent body. The first retainer defines a first retainer opening extending to a first radial distance from the central axis, and the second retainer defines a second retainer opening extending to a second radial distance from the central axis, where the second radial distance is greater than the first radial distance. Coalescing filter media is disposed in the cavity between the first retainer and the second retainer. The coalescing filter media, the cavity, the first retainer, and the second retainer cumulatively define an airflow pathway.

The technology disclosed herein relates to a filter assembly. The filter assembly has a double-sided adhesive layer having a first side and a second side and defining a filter opening. A first membrane extends over the filter opening and is directly coupled to the first side of the double-sided adhesive layer about the filter opening. An adsorbent element is directly coupled to the first membrane, where the adsorbent element and the first membrane are coextensive. A second membrane encapsulates the first membrane and the adsorbent element. The second membrane is directly coupled to the first side of the double-sided adhesive layer around the first membrane and adsorbent element.

An enhanced filtration multilayer laminated fabric includes an air permeable, moisture-vapor-transmissive central layer such as polytetra-fluoroethylene (ePTFE) sandwiched between a first pair of nonwoven textile layers and a second pair of woven textile layers. The laminated fabric may also feature a fire resistant application. The top textile layer may also include a permanent, highly breathable and highly durable electro-static discharge feature added to the inside of the layer by laying down a carbon based printed pattern on the inside of the layer. The filtration fabric may be utilized to manufacture a wearable garment that is aesthetically pleasing and comfortable to wear in all weather conditions and which effectively filters airborne particulates from entering a user's respiratory system by blocking particulates having a size of 0.3 microns and larger from inhaled air for a user's respiratory system with a particle blocking efficiency of at least 90%.

The present invention relates to a porous sheet product, to a filter element comprising the porous sheet product, to a method for producing the porous sheet product, to a method for producing the filter element, and to the use of the sheet product and of the filter element.