Low energy consumption method for separating gaseous mixtures and in particular for medium purity oxygen production
A method for the separation of gaseous mixtures, the major components of which are oxygen and nitrogen, for producing medium purity oxygen is described comprising: compressing the gaseous mixture in a first compressor to super atmospheric pressure, and dividing the pressurized gaseous mixture into first and second mixture streams; cooling the first mixture stream to its boiling point and introducing the first mixture stream into the high pressure chamber of a double rectification column; compressing and cooling the second mixture stream, condensing the cooled second mixture stream, and delivering the condensed second mixture stream to the high pressure chamber of the double rectification column; separating the gaseous mixtures in the double rectification column into a liquid oxygen product stream and a gaseous nitrogen stream, removing the liquid oxygen product stream from the low pressure chamber of the double rectification column, pumping the liquid oxygen product stream to a predetermined pressure, evaporating the oxygen product stream in an evaporator-condenser, heating the oxygen product stream, and blending the oxygen product stream with a compressed blend-air stream to the desired oxygen concentration.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4732597
- OSTI ID:
- 7256322
- Resource Relation:
- Patent File Date: Filed date 22 Apr 1986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Air separation method for supplying gaseous oxygen in accordance with a variable demand pattern
Cryogenic air separation process for the production of nitrogen
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COMPRESSED GASES
SEPARATION PROCESSES
OXYGEN
PRODUCTION
COMPRESSION
COOLING
ENERGY EFFICIENCY
EVAPORATION
NITROGEN
PRESSURIZING
EFFICIENCY
ELEMENTS
FLUIDS
GASES
NONMETALS
PHASE TRANSFORMATIONS
400201* - Chemical & Physicochemical Properties
320303 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes