2 results about "Pressure swing adsorption" patented technology

A system and method for separating air into components uses an air dehydration membrane for removing water vapor from compressed air. Dried compressed air is then directed, from the dehydration membrane, into a gas separation module which may be a membrane system, different from the air dehydration membrane, or a pressure swing adsorption (PSA) system. The air dehydration membrane is made of a hydrophilic polymer having a permeability for water vapor which is greater than its permeability for air, and having low selectivity between oxygen and nitrogen. The air dehydration membrane has a hydrophilic coating, which itself may be a polymer. The coating does not affect the selectivity of the coated dehydration membrane with respect to oxygen and nitrogen, but does increase selectivity of the membrane with respect to water vapor.

The invention relates to a method for recovering carbon dioxide from tail gas of an industrial furnace and producing lithium carbonate, which comprises the following steps of: removing particulate matters from the tail gas of the industrial furnace, performing denitration and desulfurization treatment, pressurizing the treated tail gas to 0.1-0.7 MPa, dehydrating, and removing NOx and SO2 by adopting a double-tower temperature swing adsorption device to obtain purified tail gas, introducing into a four-tower pressure swing adsorption device to separate carbon dioxide, and finally introducing the obtained carbon dioxide into a lithium hydroxide solution to prepare lithium carbonate. According to the invention, trace sulfides and nitrogen oxides in the tail gas are removed by using a temperature swing adsorption method, so that the total concentration of SO2 and NOx in the tail gas is 1t; according to the method, a pressure swing adsorption method is adopted to recover carbon dioxide, the obtained carbon dioxide gas is high in purity, high in recovery rate and large in treatment capacity, the separated and refined high-purity carbon dioxide can be used as a raw material in the carbonization process to produce battery-grade lithium carbonate, and resource utilization of the carbon dioxide in the tail gas of the industrial furnace is achieved.