LOW-TEMPERATURE CARBON DIOXIDE PRODUCTION PROCESS Russian patent published in 2004 - IPC

FIELD: inorganic compounds technology.

SUBSTANCE: invention is intended for use in production of liquefied low-temperature carbon dioxide at alcohol producing works. Preliminarily purified carbon dioxide is compressed in the first stage of triple-stage compressor to pressure from 1 to 0.7-0.8 MPa, cooled in refrigerator 2, separated from drop moisture in moisture/oil separator 3, freed of organic impurities on activated carbon in adsorber 4, and mixed with throttling steam in mixer 5, In the second stage of compressor 1, gas is compressed to pressure 2.4-2.8 MPa, cooled in refrigerator 6, and separated from drop moisture in moisture/oil separator 7. In the third stage of compressor 1, gas is compressed to pressure 6.5-7.0 MPa, cooled in refrigerator 8, and separated from drop moisture in moisture/oil separator 9. Thereafter, gas is dried with silica gel and zeolite in adsorbers 10 and 11. Thus compressed gas is liquefied in condenser 12. Condensate is conveyed to receivers 13, cooled in recuperative heat-exchanger 14, successively throttled to 0.8-1.2 MPa in throttle valve 15 and on porous filter 16. resulting vapor-liquid mixture at temperature from -46 to -35^оС is separated on vortex separator 17. Vapor is passed through heat-exchanger 15 into mixer 5 and liquid into isothermal tank 18 and then to consumers.

EFFECT: increased degree of purification.

1 dwg