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 and inhibits actuation of the valves whenever the temperature of valves is below freezing or a predetermined temperature that indicates a risk for freezing until the valves have been sufficiently warmed by the heater to avoid freezing during operation.

A carbon capture system can include a plurality of CO.sub.2 thermal swing adsorption (TSA) beds. The plurality of CO.sub.2 TSA beds can include at least a first TSA bed, a second TSA bed, and a third TSA bed configured to capture CO.sub.2 within a capture temperature range and to regenerate the captured CO.sub.2 at a regeneration temperature range above the capture temperature range. The carbon capture system can include a plurality of valves and associated flow paths configured to allow switching operational modes of each of the first, second, and third TSA beds.

Processes and apparatuses for adsorbing a species from a feed stream and regenerating adsorbent. A species from a feed stream is adsorbed in an adsorption zone with an adsorbent to provide a species lean stream and a species enriched adsorbent. In a regeneration zone disposed above the adsorption zone, the species from the species enriched adsorbent is desorbed with a regeneration gas to provide a regenerated adsorbent and a spent regeneration gas. A portion of the species lean stream is used as the regeneration gas.

An adjustable flow control device is provided which has a valve body containing a series of orifices of varying diameter and an indexable valve cover which includes at least one flow conduit which can be positioned and locked in a sealable manner over a chosen orifice while the remaining part of the valve cover closes off the other orifices of the valve body. Due to the device having fixed size orifices, each orifice will provide a fixed specific fluid flow rate for any predetermined pressure loss across the orifice. The device is suitable for use on all types of gas and liquid fluids.

An adsorption separation device is used with a cylinder, wherein the cylinder comprises a cylinder body, a first piston, and a second piston. The first piston and the second piston are arranged inside the cylinder body, and the first piston and the second piston are be spaced from each other. The cylinder further comprises a first shaft and a second shaft where the first shaft extends into the cylinder body and is connected with the first piston, and the second shaft is slidably sleeved in the first shaft and connected with the second piston. The adsorption separation device includes the cylinder. The cylinder and the adsorption separation device are actually two or more cylinders sharing the same cylinder body and controlling two or more pistons and shafts respectively. The control directions and strokes of the pistons are independent relative to each other and do not affect each other.

Systems and methods for removing organic compounds byproducts from a product stream from a pyrolysis reactor and associated systems and methods are disclosed herein. In some embodiments, the system includes a first condenser that is fluidly couplable to the product stream, a coalescer that is fluidly couplable to the product stream downstream from the first condenser along a first flow path, and a second condenser that is fluidly couplable to the product stream downstream from the first condenser along a second flow path. The system also includes a first valve positioned to regulate the flow of the product stream along the first flow path including a second valve positioned to regulate the flow of the product stream along the second flow path.

An air dryer includes a pair of main air dryer dehumidification tanks in which a dehumidification process and a regeneration process are alternately performed; a main compressor for compressing wet air to supply the wet air to an inlet line; a first direction switching valve unit; a regeneration special dryer; a second direction switching valve unit; a heating unit; and a cooler, wherein a path of cooled dry air passing through the cooler is connected to the inlet line.

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.

A control apparatus for controlling a gas purification apparatus includes a circuit configured to control to depressurize a pressure inside a compressor configured to compress a gas. The gas purification apparatus includes the compressor, a first adsorption part configured to include a first adsorbent which adsorbs impurities mixed in the gas, a second adsorption part configured to include a second adsorbent which adsorbs the impurities, and a valve provided on a pipe connecting the compressor, the first adsorption part, and the second adsorption part. The circuit is further configured to control the valve so that the second adsorbent adsorbs the impurities desorbed from the first adsorbent in a case that a pressure inside the compressor is depressurized, to regenerate the first adsorption part.

A low oxygen air supply system includes first and second low oxygen air supply units, a fan to supply the first target space with outdoor air, at least one oxygen sensor to detect oxygen concentration in the first target space, and a control unit to control behavior of the first low oxygen air supply unit, the second low oxygen air supply unit, and the fan. Each of the first low oxygen air supply unit and the second low oxygen air supply unit generates a low oxygen air lower in oxygen concentration than air and supply a first target space with the low oxygen air thus generated.