Title:
空気分離方法及び装置
Document Type and Number:
Japanese Patent JP5878310
Kind Code:
B2
Abstract:
Provided is an air separation method and apparatus in which consumed power source can be reduced when oxygen is collected in a three-column process, including:
a first separation step in which feed air is separated into high pressure nitrogen gas and high pressure oxygen-enriched liquid air;
a second separation step in which a high pressure oxygen-enriched liquid air is separated into medium pressure nitrogen gas, and medium pressure oxygen-enriched liquid air;
a first indirect heat exchange step in which a medium pressure nitrogen gas is condensed and a low pressure oxygen-enriched liquid air is vaporized by indirect heat exchange;
a third separation step in which a low pressure oxygen-enriched air is separated into low pressure nitrogen gas and low pressure liquid oxygen;
a second indirect heat exchange step in which a high pressure nitrogen gas is condensed and a low pressure liquid oxygen is vaporized by indirect heat exchange;
a third indirect heat exchange step in which a high pressure nitrogen-enriched air in an intermediate stage in the first separation step is condensed and a medium pressure oxygen-enriched liquid air is vaporized by indirect heat exchange; and
a product gas collecting step in which low pressure oxygen gas and/or low pressure liquid oxygen is/are collected as a product oxygen gas after heat recovery.
More Like This:
Inventors:
Hiroshi Tachibana
Takashi Tatsumi
Takashi Tatsumi
Application Number:
JP2011143159A
Publication Date:
March 08, 2016
Filing Date:
June 28, 2011
Export Citation:
Assignee:
Taiyo Nippon Sanso Co., Ltd.
International Classes:
F25J3/04
Domestic Patent References:
| JP8233457A | ||||
| JP2233984A | ||||
| JP2009014314A |
Foreign References:
| US20080110203 |
Attorney, Agent or Firm:
Kazuhiko Kido
Yoshihiko Kido
Yoshihiko Kido