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air  block copolyimides  gas inlet  gas  inlet system  inlet  intake  membranes  purification assembly  spray zone  spray  trough  weir 
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Spray Booth and Method of Operation

Thu, 03 Nov 2016 08:00:00 EDT

A spray booth for use within a building has a metal housing that defines a partially enclosed spray zone in which a worker operates spray equipment. The spraying operation places particulates and volatiles into the air of the spray zone. A main airflow producer draws a contaminated airflow from the spray zone through a large air intake port into an air intake plenum within the housing. A conventional particulate filter mounted in the air intake port removes droplets of paint or other coating compositions from the incoming airflow. The airflow is then directed through a filter in the air intake plenum that removes most, but not all, volatiles. Most of the fully-filtered airflow is discharged back into the spray zone but a small portion is forced by an auxiliary airflow producer to points external to the building. This causes an equal flow of fresh replacement air to be drawn into the spray zone from the interior of the building and ultimately from outdoors. Volatiles in the spray zone are reduced to acceptable levels while heating and cooling costs necessitated by replacement air flows are significantly reduced.


Thu, 03 Nov 2016 08:00:00 EDT

The present invention relates to novel block copolyimides for preparing highly selective integrally asymmetrical gas separation membranes of improved permeance, processes for preparing these block copolyimides, membranes prepared from the block copolyimides, and also the use of the block copolyimides and of the membranes prepared therefrom.


Thu, 03 Nov 2016 08:00:00 EDT

Techniques described herein are generally related to graphene membranes having gas-permeable substrates. Various example substrates may include a gas-permeable substrate with a convoluted surface and a graphene layer on the gas-permeable substrate. The membranes may also include nanopores formed on the graphene layer. The membranes may exhibit improved permeability properties. Methods and systems configured to make and use the membranes are also disclosed.

Isotopic enrichment of helium-3 through glass

Thu, 03 Nov 2016 08:00:00 EDT

Disclosed is a mass selective fluid bandpass filter. This filter provides for selecting gas molecules of a specific mass from a gas sample containing molecules of two or more mass species. This provides for a low power, low cost apparatus for producing 3He from terrestrial sources of helium gas by selective enrichment. This invention further discloses a portable, field deployable means of 3He/4He ratio determination employing one or more of the effects consisting of: statistical linear regression plots of heat ramps, variable emission currents within a quadruple mass spectrometer, use of a quadrupole mass spectrometer in concert with ultrahigh vacuum maintained by non evaporable getter pumps, and/or construction of vacuum housing structures from non-steel or non-stainless steel alloys, and/or non metallic materials selected from a group consisting of: aluminum, titanium, ceramics, or glass. This provides a compact, sensitive field deployable unit with low power consumption.


Thu, 03 Nov 2016 08:00:00 EDT

A gas inlet system for a wet gas scrubber includes a weir configured to deliver liquid to a scrubbing passage to wet the interior surface of the scrubbing vessel during operation of the gas inlet system. The weir include a weir duct and a weir trough extending at least partially around the weir duct to receive and at least partially fill with liquid during operation of the gas inlet system. The weir trough has an upper trough outlet in liquid communication with the upper weir duct inlet to deliver liquid from the weir trough into the upper weir duct inlet during operation of the gas inlet system. The weir trough also has a lower trough outlet below the upper trough outlet. The lower trough outlet is in liquid communication with the scrubbing passage to deliver liquid from the weir trough toward the scrubbing passage during operation of the gas inlet system.


Thu, 03 Nov 2016 08:00:00 EDT

An air purification assembly is described. The air purification assembly includes an intake portion, a flow apparatus coupled to the intake portion; and a chamber portion coupled to the flow apparatus. The intake portion includes a surface and at least one first opening in the surface such that the intake portion is enabled to receive contaminated air flow through the at least one first opening. The chamber portion includes at least one second opening and further comprises an activated nonmetallic element and an ultraviolet (UV) light assembly. The flow apparatus is adapted to draw contaminated air into the air purification assembly through the at least one first opening and direct the contaminated air out of the air purification assembly through the second openings.