Method and apparatus for producing liquid nitrogen
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25J-001/00
출원번호
US-0551041
(1995-10-31)
발명자
/ 주소
Gardner Thomas W. (737 Damien Way Mississauga
Ontario CAX L5C 3C3 )
인용정보
피인용 횟수 :
16인용 특허 :
4
초록▼
A method and apparatus for producing liquid nitrogen from air comprising a gaseous mixture of about 78% by volume of nitrogen, about 21% by volume of oxygen, less than 1.0% by volume of argon, and small amounts of carbon dioxide, water vapour, and other trace elements and compounds comprise an extra
A method and apparatus for producing liquid nitrogen from air comprising a gaseous mixture of about 78% by volume of nitrogen, about 21% by volume of oxygen, less than 1.0% by volume of argon, and small amounts of carbon dioxide, water vapour, and other trace elements and compounds comprise an extractor that extracts portions of the oxygen, carbon dioxide, and water vapour so as to produce a nitrogen-rich gaseous mixture comprising about 90% to about 99% by volume of nitrogen, about 10% to about 1% by volume of oxygen, and no more than trace amounts of carbon dioxide, water vapour, and other elements and compounds. A nitrogen recycle compressor compresses the nitrogen-rich gaseous mixture to a specified pressure. A gas expander expands and thereby cools the compressed nitrogen-rich gaseous mixture to a lower specified pressure which is slightly above atmospheric pressure, thereby cooling the nitrogen-rich gaseous mixture, which is fed into a heat exchanger, which cools a higher pressure nitrogen-rich gaseous mixture flowing in a separate pass of the heat exchanger, until at least a portion of the higher pressure nitrogen-rich gaseous mixture condenses to liquid state. A liquid/gas separator separates the liquid nitrogen from the nitrogen-rich gaseous mixture, which liquid nitrogen is extracted from the apparatus, through an outlet, for subsequent storage or use.
대표청구항▼
A method of producing liquid nitrogen, comprising the steps of: using air comprising a gaseous mixture of about 78% by volume of nitrogen, about 21% by volume of oxygen, less than 1.0% by volume of argon, and small amounts of carbon dioxide, water vapour, and other trace elements and compounds; extr
A method of producing liquid nitrogen, comprising the steps of: using air comprising a gaseous mixture of about 78% by volume of nitrogen, about 21% by volume of oxygen, less than 1.0% by volume of argon, and small amounts of carbon dioxide, water vapour, and other trace elements and compounds; extracting portions of the oxygen, carbon dioxide, and water vapour from said gaseous air mixture so as to produce a nitrogen-rich gaseous mixture comprising from about 90% to about 99% by volume of nitrogen, from about 10% to about 1% by volume of oxygen, and no more than trace amounts of carbon dioxide, water vapour, and other elements and compounds; compressing said nitrogen-rich gaseous mixture to a first specified pressure above atmospheric pressure; expanding the compressed nitrogen-rich gaseous mixture to a second lower specified pressure which is also above atmospheric pressure; cooling the low pressure nitrogen-rich gaseous mixture until at least a portion of said nitrogen condenses to its liquid state; separating the liquid nitrogen from the remaining nitrogen gas; and extracting the liquid nitrogen for subsequent storage or use.
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이 특허에 인용된 특허 (4)
Major Thomas O. (4105 Gray Denver CO 80212) Major ; Jr. Jack E. (1590 Harlan Lakewood CO 80214), Portable nitrogen source.
Honkonen Scott C. ; Hill Theodore B. ; Hill Charles C. ; Walker Graham,CAX, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
Honkonen, Scott C.; Hill, Theodore B.; Hill, Charles C.; Walker, Graham; Walker, legal representative, Ann Valentine, Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator.
Prasad Ravi ; Gottzmann Christian Friedrich, Solid electrolyte ionic conductor systems for oxygen, nitrogen, and/or carbon dioxide production with gas turbine.
Khandwavala, Hatim Anwarhusan; Byrd, Douglas Scott; Gallagher, Brian Michael; Janapaneedi, Durgaprasad, System and method for generating nitrogen from a gas turbine.
Bonaquist Dante Patrick ; Cribbin Nancy Rose ; Weber Joseph Alfred ; Billingham John Fredric ; Nenov Neno Todorov, System for producing cryogenic liquefied industrial gas.
Gottzmann Christian Friedrich ; Prasad Ravi ; Keskar Nitin Ramesh ; Wulf James Bragdon, Thermally powered oxygen/nitrogen plant incorporating an oxygen selective ion transport membrane.
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