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Title:
METHOD AND APPARATUS FOR AIR SEPARATION
Document Type and Number:
Japanese Patent JPH02197788
Kind Code:
A
Abstract:

PURPOSE: To avoid use of high grade heat for vapor generation by heating nitrogen through heat exchange with hot fluid from a chemical process utilizing the oxygen product of air separation and expanding the heated nitrogen flow in a turbine through action of external work.

CONSTITUTION: An air separator 2 supplies separated oxygen to a plant 6 where reaction substances form a fluid product which is taken out from the plant 6 through a pipeline 10. Nitrogen is produced under a pressure of at least 5 atm and passed through a duct 16 penetrating a heat exchanger 14. Nitrogen is heated up to 700°C or above in the heat exchanger 14. The heat is obtained by taking out hot fluid from the plant 6 and passing through the duct 16 while facing nitrogen. Consequently, the fluid is cooled and normally returned back to the plant 6. Subsequently, the fluid enters into a turbine 18 and expanded through action of external work (typically, generation of electricity).


Inventors:
Lavin, John T.
Rathbone, Thomas
Application Number:
JP1989000268852
Publication Date:
August 06, 1990
Filing Date:
October 16, 1989
Export Citation:
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Assignee:
BOC GROUP PLC:THE
International Classes:
F01K25/14; C01B3/36; F02C6/10; F25J3/04; (IPC1-7): F01K25/14; F25J3/04