METHOD OF PURIFICATION OF GAS MIXTURES FROM CARBON DIOXIDE (ALTERNATIVES) AND A DEVICE FOR PURIFICATION OF GAS MIXTURES FROM CARBON DIOXIDE (ALTERNATIVES) Russian patent published in 2005 - IPC

FIELD: petrochemical and chemical industry; purification of gas mixtures from carbon dioxide.

SUBSTANCE: the invention is pertaining to the field of purification of gas mixtures from carbon dioxide. Absorption is conducted using wipers with resistance by a gas of no more than 50 kPa. At that a solution of ethanolamine in the process of the absorption at least once is subjected to intercooling to 30-35°C. Fine regeneration of a stream of a solution of ethanolamine is realized by its treatment with machining by a live steam. The absorber is made with packet-type nozzles and contains in its middle part at least one contour of cooling made in the form of a device of withdrawal of a partially saturated solution of the absorbent cyclically linked with an intermediate container and an intermediate cooler. A hot-water boiler of the regenerator-recuperator is made in the form of the sections in series located in its lower part. The sections are consisting of heat exchangers placed on plates. At that the number of the sections of the hot-water boiler is chosen within the limits from three to six. In the double-flow circuit the outlet of the roughly regenerated absorbent is made in the form of an outlet of the blank plate located under the hot-water boiler. The regenerator-recuperator in its lower part above an outlet of the finely regenerated absorbent is supplied with an inlet of the steam feeding and with three or four steaming plates located above it. The invention allows to reduce an over-all excessive pressure of the process of purification of gas mixtures from carbon dioxide and its partial pressure, to reduce specific power inputs for purification and also to expand the field of application of the ethanolamine purification.

EFFECT: the invention allows to reduce the over-all excessive and partial pressure of the process of gas mixtures purification from carbon dioxide and to expand the field of the ethanolamine purification application.

12 cl, 7 ex, 3 dwg