Abstract: A method for the dry filtration of a gas flow carrying foreign objects, a filter device for cleaning off waste gas resulting from additive manufacturing technologies, comprises feeding a raw gas flow containing foreign objects into a raw gas space of a filter unit having at least one filter surface separating a raw gas side from a clean gas side; feeding oxidant to a reaction region located on the raw gas side of the filter surface downstream of the filter surface; such that foreign objects contained in material cleaned off from the filter surface and/or in the raw gas flow react with the oxidant in the reaction region to form oxide-containing foreign objects.

Abstract: A fan cover is an apparatus designed to prevent the buildup of dust and other particles on an air fan to improve the quality of air circulating through the air fan. To do so, the apparatus comprises a cover body, an elastic band, an insert-retaining pocket, and at least one scent-modifying insert. The cover body is designed to be attached onto the air inlet of the air fan to prevent the buildup of dust and other particles on the air fan. The elastic band facilitates the secure attachment of the cover body to the air fan so that the cover body stays attached to the air fan during operation of the air fan. The insert-retaining pocket is designed to receive the at least one scent-modifying insert without obstructing the airflow through the air fan. The at least one scent-modifying insert allows the diffusion of scents and/or fragrances into the airflow.

Abstract: An air supply to an internal combustion engine which includes at least one cylinder and a heater. A first air duct is provided for supplying air to the at least one cylinder of the internal combustion engine for operating the internal combustion engine, and a second air duct is provided for supplying air to a heater for heating an exhaust system of the internal combustion engine. The first and second air ducts are connected by a third air duct to an air filter, for providing filtered ambient air to the internal combustion engine. The first and second air ducts each have at least one control element for controlling the quantity of air flowing through. The first and third air ducts in each case have a mass flow sensor for measuring a mass of the air flowing through the corresponding air duct. Methods and devices for diagnosing the air supply are also described.

Abstract: A hollow fiber membrane module includes: an inner case; an outer case that covers the inner case from an outer periphery side with a space left therebetween; and a plurality of hollow fiber membranes that are provided in the space between the inner case and the outer case. The inner case includes an introduction portion that establishes communication between inside of the inner case and outside of the inner case on an upstream side of the inner case and the outer case. The outer case includes a discharge portion that establishes communication between inside of the outer case and outside of the outer case on a downstream side. The inner case includes a bypass portion that establishes communication between the inside of the inner case and the outside of the inner case on the downstream side. The bypass portion includes at least one opening that penetrates through the inner case between the inside and the outside.

Abstract: Apparatuses including coalescing filter are discussed and shown. The coalescing filter can optionally include: a filter media; a central core defining a central cavity, the central core positioned within the filter media; a first end cap; a coupling assembly attached to and extending outward from the first end cap, wherein the coupling assembly is configured to couple with a housing to position the coalescing filter within the housing; and a second end cap opposing the first end cap.

Abstract: A separation device for separating liquid from gas has a separation element with housing, housing cover with housing cover thread, and filter element arranged therein. A first gas passage arranged centrally relative to a mounting axis of the separation element at a connector device has the housing cover thread assigned thereto. A second gas passage is arranged radially outside the first gas passage. A connection element connecting the separation element to the connector device has a conduit and a connection element thread to which the housing cover thread is screwed. A circumferential element adjoining the connection element thread extends axially into the separation element. Connection element thread and circumferential element surround the conduit. A fluid channel extends axially between conduit and circumferential element.

Abstract: A gas separator includes a first distillation chamber and an evaporation chamber. A first liquid valve comprises an inlet in fluid communication with the first distillation chamber and an outlet in fluid communication with the evaporation chamber. A chiller is configured to chill the first distillation chamber to a first temperature and the evaporation chamber to a second temperature that is different than the first temperature. The gas separator operates a first mode during which distillation a gas mixture is received by the first distillation chamber, the gas mixture is separated into a first condensed liquid and a first separated gas mixture, and the separated gas is output by the first distillation chamber. During a second mode, the first liquid valve transfers the first condensed liquid to the evaporation chamber and the first distillation does not receive the gas mixture and does not supply the first separated gas mixture.

Abstract: The present invention relates to an adapter element (11) for a holding device for an air de-oiling element of a vacuum pump (1), comprising a first cylindrical portion (11a) having a first diameter and a second cylindrical portion (11b) having a second diameter and adapted to receive the air de-oiling element (2), whereby the first diameter is equal to or smaller than the second diameter and whereby the second cylindrical portion (11b) has circumferential recesses which form at least three fixing fingers (11e) aligned parallel to the longitudinal axis of the adapter element and distributed uniformly or non-uniformly over the circumference of the second cylindrical section (11b), wherein at least two fixing fingers (11f) are mounted so as to be elastically radially displaceable. The present invention also relates to a holding device (10) for an air de-oiling element (2) of a vacuum pump (1), in particular an oil vacuum pump.

Abstract: Embodiments of the present disclosure provide a carbon molecular sieve membrane (and precursors therefor) including a pyrolysis product of an oxygen-free ladder polymer of intrinsic microporosity. Embodiments of the present disclosure further provide a method of gas separation including contacting a fluid including one or more gas components with a carbon molecular sieve membrane, wherein the carbon molecular sieve membrane includes a pyrolysis product of an oxygen-free ladder polymer of intrinsic microporosity, and separating at least one of said gas components from the fluid. Embodiments of the present disclosure further provide a method of preparing a carbon molecular sieve membrane including heating an oxygen-free ladder polymer of intrinsic microporosity to a pyrolysis temperature in an oxygen-free atmosphere to form, optionally without producing any oxygen-containing gas, a pyrolysis product.

Abstract: A filter cartridge is provided. The filter cartridge includes a pack of filter media having an inlet face and an outlet face. The filter media pack further includes opposite first and second sides and opposite first and second ends. The sides and ends extend transversely between the inlet and outlet faces. The sides also extend transversely between the ends such that each end has an external non-planar, curved or multifaceted geometry. The filter cartridge further includes a pair of end caps located against each end of the filter media pack. Each end cap has an internal surface with a geometry closely matching the geometry of the associated filter media pack end. Further, an adhesive is disposed between the filter media pack and the end caps to secure them together.

Abstract: A gaseous fluid filter has a filter element insertable into the filter housing through a service opening. A clamping wedge is insertable in a joining direction for clamping the filter element in clamping direction against the filter housing. The filter element rests against the filter housing with a seal surface facing away from the clamping wedge. The clamping wedge has a housing wedge side facing a housing stop and a filter element wedge side facing a filter element stop. These wedge sides each have first and second bearing surfaces separated by a step. The joining direction extends in or parallel to a contact plane between housing wedge side and housing stop. The first and/or second bearing surface of the filter element wedge side is positioned at a wedge base angle of 1° to 20° to the joining direction. The steps of the wedge sides are offset in joining direction.

Abstract: The invention relates to a filter element (10) for an air filter device of a motor vehicle, having a frame which at least partially surrounds a filter material (18) of the filter element (10). The frame comprises a front wall (20) which extends perpendicularly to an insertion direction (22), in which the filter element (10) can be inserted into a receiving space (14) of a housing (12) of the air filter device. At least one fastening element (26) is arranged on a front side (24) of the front wall (20), onto which a cover of the air filter device designed to close the receiving space (14) can be fixed. A plate-shaped base body of the front wall (20) has a narrow side beyond which a retaining tab (76) of the filter element (10) formed separately from the at least one fastening element (26) projects.

Abstract: A carbon dioxide recovery system includes a distillation column for heating an absorption solution having carbon dioxide absorbed therein to cause the carbon dioxide to be released from the absorption solution, a first reboiler that causes heat exchange to occur between a heating medium and the absorption solution extracted from the distillation column, a methanation device that includes a reactor for producing methane by causing a reaction between carbon dioxide and hydrogen, a reaction gas supply line for supplying the reaction gas flowed out from the reactor, to the first reboiler, as a heating medium, and a reaction gas return line for returning, to the methanation device, the reaction gas that had exchanged heat with the absorption solution in the first reboiler.

Abstract: A volatile organic compound (VOC) removal system for removing VOC generated during a painting process of a vehicle body includes a paint spraying booth where paint is applied to the vehicle body, a paint baking oven for fixing the paint on the vehicle body applied with the paint in the paint spraying booth, an integration chamber for receiving a booth discharge gas from the paint spraying booth through a booth gas inflow line, to receive an oven discharge gas from the paint baking oven through an oven gas inflow line, and to form a mixture gas by mixing the received booth discharge gas and the received oven discharge gas, a VOC concentrator for forming a process gas by concentrating the mixture gas supplied from the integration chamber to increase a VOC concentration, and a VOC removing apparatus for removing VOC from the process gas supplied from the VOC concentrator.

Abstract: Disclosed are a system and method for purifying hydrogen, and a system for producing hydrogen by water electrolysis. The system for purifying hydrogen includes three dryers, and the three dryers share one regeneration cycle module. This significantly reduces a quantity of regeneration cycle modules, and therefore, manufacturing cost of the system is relatively low. In addition, a first gas-gas heat exchanger (4) is arranged in a regeneration cycle system, so that heat exchange can be performed between low-temperature regeneration hydrogen before regeneration and high-temperature regeneration tail gas after regeneration. In this way, residual heat of the high-temperature regeneration tail gas can be fully utilized, and power consumption of a subsequent heater and regeneration cooler can be significantly reduced. Therefore, energy consumption of the system is relatively low.

Abstract: A filter medium for an air filter is composed of a wet-laid nonwoven fabric. The filter medium contains a binder resin and a water repellent. The water repellent contains, as a main component, a hydrocarbon-based polymer free of fluorine and silicon in a molecule thereof. The binder resin and the water repellent are crosslinked by an isocyanate crosslinking component.

Abstract: Dryer for a compressed gas includes a pressure vessel containing a drying zone and a regeneration zone, a drum provided with regenerable drying agent, an inlet for the supply of the compressed gas to be dried to the drying zone, an outlet for the expulsion of dried compressed gas, a first connection line for branching off a partial stream of the compressed gas to be dried or the dried compressed gas and conducting this partial stream to the regeneration zone, adjustable means for the combination of the partial stream with the supply stream and regulation of the flow from the partial stream with regard to the supplied stream, at least one sensor for measuring at least one measurement value with regard to the function of the dryer, a control unit for processing of the at least one measurement value and installation of a control signal on the adjustable means.

Abstract: The present invention relates to processes and systems for ammonia recovery and/or acid-gas separation. In some embodiments, a system for acid gas separation may be integrated with an ammonia abatement cycle employing a high temperature absorber. In some embodiments, a system for acid gas separation may employ a higher temperature absorber due to the lower energy consumption and cost of the integrated ammonia abatement cycle. Advantageously, heat may be recovered from the absorber to power at least a portion of any acid gas desorption in the process. Reverse osmosis or other membranes may be employed.

Abstract: The present invention relates to a thermally bonded biodegradable filter support and a biodegradable composite filter media for an air filter and a mask using the same. More particularly, the present invention relates to an environmentally-friendly dry nonwoven fabric or thermally bonded biodegradable filter support and a biodegradable composite filter media for air filters, which biodegrade under soil burial conditions when disposed of after reaching the end of their lifespan.

Abstract: The invention relates to a method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps: folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form; and subsequently welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold by means of a thermal-contact welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold. The invention furthermore relates to a corresponding apparatus and a corresponding nonwoven material.