The present invention provides a heat-driven adsorption vacuum dehumidification system including a vapor adsorption apparatus having a water permeable hydrophilic membrane separating the apparatus into at least a feed section and a low-pressure or vacuum section (evaporator), and providing a water vapor pressure difference to extract moisture from the air flowing through the apparatus into the evaporator, followed by adsorption in an adsorption chamber, and subsequently desorbed when acted as a desorption chamber to form water vapor which is condensed in a condenser. Adsorption and desorption chambers inter-change periodically to form a complete system cycle. Heating of chamber/compartment can be from waste heat or a renewable source in the absence of any electricity supplied externally. Related method for using a heat-driven adsorption vacuum dehumidification system to remove moisture from the air is also provided. The present invention is superior to the adsorption chiller over a wide range of operating conditions.

Device for drying compressed gas having at least two vessels containing a regenerable drying agent and an controllable valve system with a first valve block and a second valve block. The device is further provided with a first regeneration line with heating means and a second regeneration line for discharging saturated regeneration gas. The regeneration lines are connected to a different valve block, wherein in the first regeneration line between a blow-off opening or blower and the heating means an additional vessel with a regenerable drying agent is incorporated.

The present invention and embodiments thereof provide a process to separate ethylene products from impurities such as nitrogen, hydrogen, ethane, propane and isobutane without the need for distillation processes.

A tank for accumulating oxygen enriched air from an oxygen concentration device is disclosed. The oxygen concentration device includes a canister including a nitrogen-adsorbent material. A compressor is coupled to the canister. The compressor compresses air for the canister to produce oxygen enriched air in a swing adsorption process. The tank includes a closed container for collecting oxygen enriched air produced in the canister. An inlet is coupled to the container. An outlet in the container allows a patient to inhale the collected oxygen enriched air. An adsorbent material within the container adsorbs oxygen enriched air added to the tank from the canister.

Provided an air cleaning system, which includes: a first reactor which has a first inlet and a first outlet and in which a channel is formed; a first moisture adsorption filter and a first water-soluble gas pollutant adsorption filter that are provided inside the first reactor and are provided so that a gas passes therethrough sequentially while flowing along the channel from the first inlet to the first outlet; a plurality of first magnetrons that are provided at a lateral portion of the first reactor so as to correspond respectively to the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter and selectively apply microwaves to the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter; and a heat exchanger that receives hot air containing a water-soluble gas pollutant and moisture, both of which are desorbed from the first moisture adsorption filter and the first water-soluble gas pollutant adsorption filter and are discharged by the first outlet, condenses the moisture into water, and dissolves and discharges the water-soluble gas pollutant in the condensed water. According to the present invention, the air cleaning system can unify a dehumidifying process and a water-soluble gas pollutant removing process to simplify an air cleaning process, recover and recycle waste heat by introducing microwaves and the heat exchanger so as to contribute to energy saving, and be used semi-permanently without a need to periodically replace a filter.

An oxygen concentrator comprises a product tank that is fluidly coupled to at least one sieve bed, and a product gas accumulator tank that is fluidly coupled to the product tank via a first conduit and to an outlet port via a second conduit, wherein the first conduit and the second conduit are disposed to allow at least a portion of product gas to flow from the product tank to the outlet port.

Disclosed in certain embodiments are methods of removing water from a gas feed stream comprising mercaptans and water during an adsorption step of an adsorption cycle.

Method for drying compressed gas by means of a drying device with an inlet and an outlet including at least two vessels filled with a regenerable desiccant and a controllable valve system including a first and a second valve block connecting the inlet, respectively the outlet to the vessels. The valve system is being regulated such that one vessel will dry compressed gas, while the other vessel is successively regenerated and cooled. The method includes a first and a second cooling cycle. The first cooling cycle includes passing ambient air through the vessel to be cooled. The second cooling cycle includes branching off, expanding and sending dried compressed gas through the outlet to be branched off and then blowing it off through the vessel to be cooled, using either the first or the second cooling cycle, or both, depending on predetermined conditions.

An aircraft environmental control system includes means for mixing and conditioning bleed air from a bleed air input and recirculation air from an aircraft interior to provide mixed, conditioned air to the aircraft interior. The system also includes a first contaminant removal device and a second contaminant removal device arranged in a path of at least part of the recirculation air, prior to the means for mixing and conditioning, and a valve (SV1) arranged to alternate flow of recirculation air through the first and second contaminant removal devices.

Method for drying compressed gas by means of a drying device with an inlet for the compressed gas to be dried and an outlet for the dried compressed gas. The drying device includes at least two vessels filled with a regenerable desiccant and an adjustable valve system including a first valve block and a second valve block that connects the inlet, respectively outlet, to the vessels. The adjustable valve system is being regulated as such that at least one vessel will dry compressed gas, while the other vessel will be regenerated and cooled successively, wherein by regulation of the valve system the vessels will each in turn dry compressed gas. The method includes calculating the time period (t.sub.ads) during which a vessel (2) dries compressed gas, calculated on the basis of a (t.sub.ads) formula t.sub.ads=A*B.