Integrated cyclic scrubbing and condensate stripping process for the removal of gaseous impurities from gaseous mixtures

A process for removing acid gases such as CO2 and H2S from gas streams using a cyclic aqueous alkaline scrubbing solution which is circulated between an absorption stage (1) and regeneration stage (2) is improved by integrating within this cyclic system a process scheme wherein, by virtue of an init...

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Bibliographische Detailangaben
1. Verfasser:	ROBERT MICHAEL OSMAN
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS COMPOUNDS THEREOF GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for removing acid gases such as CO2 and H2S from gas streams using a cyclic aqueous alkaline scrubbing solution which is circulated between an absorption stage (1) and regeneration stage (2) is improved by integrating within this cyclic system a process scheme wherein, by virtue of an initial cooling step 6), condensed steam having gaseous impurities dissolved therein is recovered (8) from the feed gas and let down (9) to a pressure below which scrubbing solution regeneration takes place. While maintaining this pressure, the process condensate is heated, boiled and stripped (11) to evolve a vaporous mixture (13) comprising steam and gaseous impurities which are compressed (14) and introduced into the regeneration stage (2). By this process, useful work is performed by low temperature process streams thereby improving the overall efficiency of the cyclic process.