Device for adsorbing a gas from a gas mixture to be treated, having an inlet for gas to be treated and an outlet for treated gas, including at least two vessels filled with a regenerable adsorbent and an adjustable valve system connecting the inlet and outlet to the vessels, whereby the adjustable valve system is such that at least one vessel will treat compressed gas while the other vessel is regenerated, whereby by adjusting the valve system the vessels each in turn treat compressed gas sequentially, and the adjustable valve system is assembled in a single valve block.

Methods and apparatus may implement controlled generation of oxygen enriched air in an oxygen concentrator while implementing control that reduces pneumatic imbalance between the concentrator's canisters, such as dynamic pressure imbalance or other pneumatic characteristic. One or more controllers may regulate operation of a compressor that feeds a pressurised air stream to the concentrator's canisters. This may regulate speed of the compressor to a speed set point for generating the pressurised stream. The regulating may involve generating a compressor control signal having a characteristic parameter such as a power parameter. The controller(s) may operate valve(s) in a cyclic pattern so as to produce oxygen enriched air in an accumulator. A cycle of the cyclic pattern may include a plurality of phases, where each of the plurality of phases has a duration. The controller(s) may then generate a dynamic adjustment to the duration(s) based on an evaluation of the characteristic parameter.

A compact desiccant air breather with unidirectional air flow comprises a housing with a plurality of air inlets adjacent an upper end for air intake. A desiccant bed of water absorbing material is within the intake flow path of air and an air chamber is within the intake flow path of air downstream of the desiccant bed. A one-way inflow check valve is adjacent the desiccant bed between the desiccant bed and the air chamber and is configured to allow airflow from the desiccant bed material to the air chamber and to prevent reverse airflow. A coupling member has an air flow conduit there-through which is in fluid communication with the air chamber and forms an air intake flow path exit. A one-way exhaust check valve in fluid communication with the air chamber is configured to allow airflow from the air chamber to the exterior and to prevent reverse flow.

A method and device for regeneration of an adsorption air dryer having at least two desiccant-filled drying vessels connected in parallel, wherein a humid compressed-air stream generated by a compressor flows through one of the drying vessels in a drying phase and a dry compressed-air stream flows through the other drying vessel, for the purpose of dewatering the desiccant, in a simultaneous regeneration phase, wherein a valve arrangement is provided for switching the drying vessels alternately between drying phase and regeneration phase during normal operation, wherein the control mechanism are provided for implementing a post-regeneration phase, which control mechanism initiates a further flow through the drying vessel with dry compressed air for complete regeneration and also a flow through the other drying vessel; with dry compressed air for complete regeneration, so that, upon the next start of operation of the adsorption air dryer, operation commences with fully regenerated drying vessels.

Disclosed is a mutual switching type compressed air purification apparatus, comprising a main intake pipe, a main exhaust pipe, two vent valve assemblies, two drying cylinders and a solenoid valve. The main intake pipe is connected to the two vent valve assemblies of which inlet holes are communicated with the corresponding drying cylinders respectively, and air outlets of the drying cylinders are respectively connected to the main exhaust pipe. The solenoid valve is connected to a first pilot air hole of the first vent valve assembly, and also connected to a second pilot air hole of the second vent valve assembly to control the opening and closing of the vent valves, and valve cores of the solenoid valve are switched between a first valve position and a second valve position.

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve performing a startup mode process prior to beginning a normal operation mode process to remove contaminants from a gaseous feed stream. The startup mode process may be utilized for swing adsorption processes, such as TSA and/or PSA, which are utilized to remove one or more contaminants from a gaseous feed stream.

An air dryer having a heater element associated with its valves to prevent freezing at cold temperatures. The air dryer includes a temperature sensor and an electronic controller that reads the temperature sensor during normal operations and selectively opens and closes certain of the valves when the temperature falls below a predetermined threshold to enter a safe mode that avoids freezing of the valves during operation. If an exhaust valve is open when safe mode is entered, the corresponding inlet valve is closed, both of the exhaust valves are closed, and the other inlet valve if opened. If an exhaust valve is not open, both inlet valves are opened and both exhaust valves are closed.

A sorbent bed assembly of a fuel cell system, including a first sorbent bed, a second sorbent bed and at least one third sorbent bed, the second sorbent bed disposed between the first sorbent bed and the at least one third sorbent bed, a cover plate on the plurality of sorbent beds and configured to connect the sorbent beds to one another, a fuel inlet connector on the cover plate and configured to receive a fuel, a manifold having a first fluid conduit configured to transport fuel between the first sorbent bed and at least one third sorbent bed, and a second fluid conduit configured to transport fuel between at least one third sorbent bed and the second sorbent bed, and a fuel outlet connector on the cover plate and configured to receive fuel that has passed through each of the sorbent beds.

Provided are apparatus and systems for performing a swing adsorption process. This swing adsorption process may involve passing streams through adsorbent bed units to remove contaminants, such as water, from the stream. As part of the process, the adsorbent bed unit may provide access to the adsorbent material within the adsorbent bed unit without having to remove one or more of valves, conduits and manifolds.

The present invention relates to a gas-filtering system (1000, 3000, 4000, 5000, 6000) comprising: an input (1100) for the gas, a reactor (1301, 1302, 1303) for filtering the gas at the input (1100) and thus obtaining a filtered gas, an output (1200) for the filtered gas, a vacuum generator (1401, 1402) for generating a vacuum inside the reactor (1301, 1302, 1303), where the vacuum generator (1401, 1402) is configured so as to apply a first predetermined vacuum value (VI) in a first vacuum phase (T2) and so as to apply a second predetermined vacuum value (V2) in a second vacuum phase (T3); the filtering system (1000, 3000, 4000) further comprising a flow controller (1501, 1502, 1503) connected at the output to the reactor (1301, 1302, 1303), where the flow controller (1501, 1502, 1503) is configured so as to block the introduction of the filtered gas into the reactor (1301, 1302, 1303) during the first vacuum phase (T2), and where the flow controller (1501, 1502, 1503) is configured so as to allow the introduction of the filtered gas and/or a second gas into the reactor (1301, 1302, 1303), starting from the output (1200) during the second vacuum phase (T3).