Certain embodiments of the invention relate to a method and facility for purifying a high-flow gas stream by absorbtion, the purification facility comprising at least one absorber having a parallelepipedal enclosure arranged horizontally and comprising: a gas stream inlet and outlet, two fixed-bed absorbent masses each having a likewise parallelepipedal shape, the surfaces of which are parallel to the surfaces of the enclosure, and a set of volumes allowing the traversing of the two absorbent masses by the gas streams, in parallel but opposite directions, the traversing occurring horizontally over the entire cross-section of each of the absorbent masses and over their entire thicknesses.

A desiccant replacing apparatus may include a supply-discharge member, a supply connection line connected to the supply-discharge member, an air conveyor coupled to the supply connection line, a discharge connection line connected to the supply-discharge member, and an air amplifier coupled to the discharge connection line. The supply-discharge member may include a housing providing an internal space, an injection line providing an injection path and penetrating the housing, an exhaust line providing an exhaust path connected to the internal space, and a filter in the internal space or the exhaust path. The supply connection line may be connected to the injection line, and the discharge connection line may be connected to the exhaust line.

A method and system of predicting a replacement time of a cartridge for an air processing unit (APU) of a vehicle, include: checking an internal pressure of an air tank by a controller when an engine of the vehicle is started; calculating and accumulating a passing flow amount through the cartridge of the APU using a pressure change due to filling the air tank with air; and determining that the replacement time of the cartridge has been reached when an accumulated total passing flow amount exceeds a predetermined value. Therefore, it is possible to predict the replacement time of the cartridge by calculating an air flow amount based on the pressure change of the air tank.

Reactive sorber is a flow sorption column for purification of gases at pressures till hundreds of bars by way of chemical capturing of impurities by metallic powder reactant (6). The powder is continuously rubbed in the process of mechanical stirring and is sorted with the help of a filtering divider (8) into two fractions, activated particles and exhausted material (12). The latter is removed into a waste collector (11, 13), which has a level meter calibrated in the units of purity of the gas exiting from the sorber.

One embodiment of the present invention sets forth a technique for operating an oxygen concentrator. The technique includes measuring a product gas within an oxygen concentrator to produce a product gas measurement, and determining that an output of the oxygen concentrator is fluidly connected to a respiratory ventilation device based on the product gas measurement. The technique further includes, in response to determining that the oxygen concentrator is fluidly connected to the respiratory ventilation device, determining that the output of the oxygen concentrator does not meet a supply gas requirement of the respiratory ventilation device and, in response to determining that the output of the oxygen concentrator does not meet the supply gas requirement, adjusting a control output in the oxygen concentrator to modify operation of the oxygen concentrator.

The present invention discloses an air filter cartridge for use in an air-purifying device for removing formaldehyde (methanal, HCHO) and other aldehyde-like VOCs (Volatile Organic Compounds), and in certain embodiments amine-like VOCs, from indoor air. The air filter cartridge is made up of a casing containing a plurality of filament-like elements as a support and a mixture of one or more natural polyphenols and a catalyst integrated in said support as a powder, forming a sponge-like mesh. The air filter acts as an absorption filter, the sponge-like mesh reacting irreversibly with the aldehyde-like VOCs present in the air, generating a polymer in the form of a polyphenol-aldehyde resin inside the air filter. Due to this irreversible reaction, the air filter is capable of capturing formaldehyde, as well as other aldehyde-like VOCs that are less reactive than formaldehyde, amine-like VOCs and ammonia.

A vent filter (1), preferably for a pure liquid storage tank, comprising a cylindrical shell (2), at least one compartment (A) for accommodating granular filter material (3), said at least one compartment (A) defined between an inner peripheral surface (4) of the shell (2) and a pair of spaced apart separator plates (5) arranged in the shell (2) such that the spacing of the separator plates (5) in the axial direction of the shell (2) can be changed and fixed so as to apply a pressure on the granular filter material (3) in the at least one compartment (A). An air inlet (6) and an air outlet (7) are respectively arranged to allow a flow of air through the granular filter material (3) in the at least one compartment (A).

A carbon dioxide scrubber includes an adsorption chamber through which an adsorption airflow is directed, a regeneration chamber through which a regeneration airflow is directed, and a divider wall separating the adsorption chamber from the regeneration chamber. A carbon dioxide sorbent bed extends across the adsorption chamber and the regeneration chamber. The carbon dioxide sorbent bed is configured to adsorb carbon dioxide from the adsorption airflow into the sorbent bed and exhaust carbon dioxide from the carbon dioxide sorbent bed into the regeneration airflow. The carbon dioxide sorbent bed is continuously movable through the adsorption chamber and the regeneration chamber.

System and method for removing molecular contaminants from an air stream are disclosed. The system includes first, second and third filter. The first filter removes organic contaminants from an air stream passing through the first filter. The second filter is downstream of the first filter, is physically and chemically exchangeable with the first filter and removes organic contaminants from the air stream output of the first filter. The third filter, downstream of the second filter, is not exchangeable with the first filter or the second filter. The first position filter can be replaced by the second filter in the second position when the first filter in the first position becomes depleted as detected. A new filter in the second filter position is inserted. Replacing the depleted first filter with the second downstream filter reduces costs and waste while inserting the new filter in the second position ensures removing organic contaminants.

A device for monitoring humidity in a compressed air system comprises a light emitter; a light sensor; and a hygromorphic element. The hygromorphic element is exposed to a source of compressed air and positioned between the light emitter and the light sensor. The hygromorphic element changes the amount of light passing between the light emitter and the light sensor as the humidity in the compressed air increases.