An air composition adjusting device includes: an oxygen separator that separates oxygen from external air to be supplied to a target space; a gas supply path including a high concentration gas supply path for oxygen through which the oxygen separator communicates with the target space; and a controller that performs an oxygen concentration raising operation of supplying a high oxygen concentration gas, which has a higher oxygen concentration than external air before being treated by the oxygen separator, to the target space through the high concentration gas supply path for oxygen.

An object of the present invention is to provide a gas refining apparatus which can produce a product gas with high purity and high yield at low cost and can produce a plurality of types of gas as a product gas without changing an adsorbent, and the present invention provides a gas refining apparatus (10) including a first derivation line (L3) connected to the second adsorption towers (2a, 2b) and through which the first gas flows, a second derivation line (L4) connected to the second adsorption towers (2a and 2b) and through which the second gas flows, a regeneration line (L5) connected to the first adsorption towers (1a, 1b), through which a regeneration gas for regenerating a first adsorbent in the first adsorption towers (1a, 1b) flows, and a pump (P) provided in the second derivation line (L4) and configured to desorb the second gas from a second adsorbent in the second adsorption towers (2a and 2b), and the regeneration line (L5) is connected to each of the first derivation line (L3) and the second derivation line (L4).

A radial adsorber can be configured to facilitate utilization of different layers of material. The radial adsorber, system using at least one radial adsorber, and methods of utilizing embodiments of the radial adsorber can help permit improved efficient operation of fluid purification processing while also being configured to minimize, if not fully avoid, being susceptible to the effect of fluidization.

A filter for a sorbent regeneration process includes a base, a central rod, support frames, and a filter screen. The central rod is coupled to the base and defines a longitudinal axis of the filter. Each of the support frames are coupled to and protrude radially from the central rod. Each of the support frames are coupled to the base. For each pair of neighboring support frames, the filter includes a triangular support member disposed between the pair of neighboring support frames. Each triangular member is coupled to the central rod and to each of the neighboring support frames. The filter screen surrounds the support frames and is coupled to the support frames and to the base.

An evaporated fuel treatment device includes a main adsorption chamber and a sub adsorption chamber. The sub adsorption chamber includes a first adsorption layer, a second adsorption layer and a high-desorption layer. The second adsorption layer is situated closer to an atmosphere port than the first adsorption layer is, and has a lower performance of adsorbing fuel vapor than the first adsorption layer does. The high-desorption layer is situated closer to the main adsorption chamber than the first adsorption layer is, and a higher performance of desorbing the fuel vapor than the first adsorption layer or the second adsorption layer does.

A portable oxygen concentrator includes at least one separation mechanism and an oxygen storage tank, where the separation mechanism is connected to the oxygen storage tank and includes an air bag and a molecular sieve tank that is filled with a molecular sieve for adsorption. The air bag has an air inlet and an air outlet. The air bag is connected to the molecular sieve tank through a valve group, which includes a first single valve and a second single valve. The air bag is connected to the molecular sieve tank through the first single valve. Each of the two ends of the molecular sieve tank has at least one gas outlet. When an inner space of the air bag is compressed and expanded once, the molecular sieve in the molecular sieve tank adsorbs and desorbs once.

Plant and method for the abatement of polluting components contained in biogas to be treated, wherein a plurality of filtering tanks suitable to be connected to a supply line of biogas to be treated contain each an adsorbing agent for the adsorption of the undesired polluting components when streams of biogas flow through each filtering tank. The plurality of filtering tanks are switched cyclically among them so that, during the operation of the plant, at least a first tank is temporarily isolated from the supply line and subjected to a regeneration phase of its adsorbing agent saturated by polluting components previously adsorbed, while one or more of the other filtering tanks remain connected with and are fed by the supply line with their respective adsorbing agent which continue adsorbing polluting components contained in the streams of biogas flowing through them.

An apparatus for treating gaseous pollutants includes a gas inlet part, a first treatment unit, a second treatment unit and a non-mechanical flow-guiding device. The gas inlet part includes a gas inlet chamber and at least one guide pipe. The guide pipe communicates with the gas inlet chamber and guides an effluent stream from a semiconductor process to the gas inlet chamber. The first treatment unit is coupled to a bottom end of the gas inlet part and is configured to abate the effluent stream. The non-mechanical flow-guiding device is coupled to the first treatment unit. The flow-guiding device is configured to guide the effluent stream to move toward an opening. The second treatment unit is coupled to the flow-guiding device via the opening, receives the effluent stream from the first treatment unit and further abates the effluent stream.

A dryer includes a dehumidification filter containing a temperature responsive material with an upper critical solution temperature, a fan sending gas through the dehumidification filter, a heater heating the dehumidification filter, and a controller controlling the fan and the heater and switching an operation mode of the fan and the heater between a drying mode and a regeneration mode, wherein, in the drying mode, an object to be dried is dried with the fan sending the gas through the dehumidification filter that is heated by the heater to temperature higher than or equal to the upper critical solution temperature, and in the regeneration mode, the dehumidification filter is regenerated with the fan sending the gas through the dehumidification filter at temperature lower than the upper critical solution temperature.

An aeration assembly includes an aeration rod extending along a longitudinal axis between a first end and a second end and having a plurality of longitudinal grooves extending along the longitudinal axis from the first end at least partially to the second end around at least a portion of a circumference of the aeration rod. The aeration assembly also includes an air-activated material adjacent the aeration rod at least along the plurality of longitudinal grooves. The plurality of longitudinal grooves are configured to distribute air from the first end of the aeration rod to the air-activated material adjacent the aeration rod.