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Patent Searching and Data


Title:
AIR SEPARATING METHOD, AND DEVICE USED THEREIN
Document Type and Number:
Japanese Patent JP2005009755
Kind Code:
A
Abstract:

To provide an air separating method capable of enhancing purity of a product, and not requiring heightening of a rectifying column.

In the method for carrying out cryogenic separation of air in the rectifying column, accumulating liquid air in a bottom, and taking out a desired component from a top part in a gas state, a plurality of horizontally arranged small rectifying columns 1 and 2 are used as the rectifying column, and the total tray number of rectification trays 1a and 2a of each small rectifying column 1 and 2 is set so that it is the theoretical tray number necessary for concentrating the desired component. When manufacturing the desired component in high purity by introducing the desired component taken out of one small rectifying column 1 into the other small rectifying column 2 in a gas state, and taking out nitrogen-containing liquid 10 accumulated in a bottom of the small rectifying column 2 and supplying it to a top part of the one small rectifying column 1 between each small rectifying column 1 and 2, the desired component taken out of the one small rectifying column 1 is introduced into the other small rectifying column 2 after introducing it into a gas booster 4 and pressurizing it, and the nitrogen-containing liquid 10 in a lower part of the other small rectifying column 2 is supplied to the top part of the one small rectifying column 1 by the pressure difference.


Inventors:
Miyamoto, Atsushi
Matsubayashi, Ryosuke
Miyamoto, Hideki
Suenaga, Junya
Application Number:
JP2003000173618
Publication Date:
January 13, 2005
Filing Date:
June 18, 2003
Export Citation:
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Assignee:
AIR WATER INC
International Classes:
F25J3/04; C01B21/04; (IPC1-7): F25J3/04
Attorney, Agent or Firm:
西藤 征彦