Abstract: An organic solvent recovery system of the present invention includes: an organic solvent recovery device that includes a first adsorbing material, and further includes at least three treatment tanks that alternately perform an adsorption treatment of adsorbing the organic solvent and of discharging a first treated gas, a desorption treatment of desorbing the organic solvent and of discharging a desorbed gas, and a drying treatment of drying the first adsorbing material and of discharging a dry outlet gas; an organic solvent concentration device that includes a second adsorbing material, adsorbs the organic solvent from the first treated gas, discharges a second treated gas, desorbs the organic solvent with a desorbing gas, and discharges the organic solvent as a concentrated gas; and a return flow path that returns the concentrated gas.

Abstract: Provided is an organic solvent recovery system including a recovery device, a dehydration device, and a return device, in which the dehydration device includes: a dehydration material that adsorbs moisture contained in a recovered solvent by coming into contact with the recovered solvent; one or more dehydration treatment tanks in which the dehydration material is stored; and a discharge mechanism that supplies the recovered solvent separated by a separator to the dehydration treatment tanks, and discharges, from the dehydration treatment tanks, a dehydrated solvent dehydrated from the recovered solvent by the dehydration material, and the return device sends the recovered solvent into a layer of the recovered solvent in the separator when returning the recovered solvent in the dehydration treatment tanks to the separator.

Abstract: In an upper portion in the inside of an adsorption and desorption treatment apparatus (100), a plate-shaped member (31), an annular erected wall (32), and an annular plate (33) are provided. The adsorption and desorption member (15) includes a cylindrical adsorption and desorption element (131) and an attachment plate (2) including a flange portion (2F). An attachment region (1B) is provided at a position where the flange portion (2F) and the annular plate (33) are superimposed on each other when the adsorption and desorption member (15) is accommodated in the inside of the adsorption and desorption treatment apparatus (100) by being inserted in an open hole (3A). The attachment region (1B) includes a hexagon head bolt (8) and a nut (5). The flange portion (2F) is provided with a first hole portion (2a). The annular plate (33) is provided with a second hole portion (3a).

Abstract: In the attachment region, a bolt inserted in a hole portion is screwed into a threaded recess and a flange portion side is tightened, so that hermetic sealing at a position where a gap between the flange portion and the plate-shaped member and the threaded recess are contiguous is achieved and a leakage cut-off structure that cuts off leakage of raw gas or carrier gas from a plate-shaped member side toward a flange portion side is formed.

Abstract: An organic solvent recovery system includes cooling condensing devices, a first flow passage, first concentration devices, a second flow passage, and a second concentration device. The number of the first concentration devices provided is at least two or more, the number of the second concentration devices provided is at least one or more, and the number of the concentration devices is less than the number of the first concentration devices.

Abstract: The present concentration device includes a membrane module having a first and a second flow paths that are separated by a semipermeable membrane, the module including a U-shaped tube in which the semipermeable membrane is disposed, a first flow-path-inlet and a first flow-path-outlet connection parts, and a second flow-path-inlet and a second flow-path-outlet connection parts, the device including an introducing unit for introducing a subject solution with a predetermined pressure into the first flow path from the first flow-path-inlet connection part, separating the subject solution into a concentrate and a permeate through the semipermeable membrane, passing the permeate through the second flow path, draining the concentrate from the first flow-path-outlet connection part, introducing the subject solution with a pressure lower than the predetermined pressure into the second flow path from the second flow-path-inlet connection part, and draining a diluent diluted with the permeate, from the second flow-path

Abstract: A precipitation system for precipitating the target component is provided. The precipitation system includes: a reverse osmosis module; a precipitation device; a membrane separation device that includes a semipermeable membrane module including a first chamber and a second chamber separated by a semipermeable membrane, and that makes the feed solution after precipitation of the target component in the precipitation device flow to each of the first chamber and the second chamber and pressurizes the feed solution in the first chamber to transfer water into the second chamber via the semipermeable membrane and thereby concentrate the feed solution in the first chamber and dilute the feed solution in the second chamber; first return means for returning the feed solution concentrated in the membrane separation device to the precipitation device; and second return means for returning the feed solution diluted in the membrane separation device to the reverse osmosis module.