US 11,980,848 B2
Apparatus for purifying gas
Kristian Melin, Espoo (FI); Pekka Simell, Espoo (FI); Esa Kurkela, Espoo (FI); and Marjut Suomalainen, Espoo (FI)
Assigned to TEKNOLOGIAN TUTKIMUSKESKUS VTT OY, Espoo (FI)
Filed by TEKNOLOGIAN TUTKIMUSKESKUS VTT OY, Espoo (FI)
Filed on Apr. 20, 2023, as Appl. No. 18/136,938.
Application 18/136,938 is a division of application No. 16/610,157, granted, now 11,660,569, previously published as PCT/FI2018/050350, filed on May 9, 2018.
Claims priority of application No. 20175414 (FI), filed on May 9, 2017.
Prior Publication US 2023/0256387 A1, Aug. 17, 2023
Int. Cl. B01D 53/75 (2006.01); B01D 53/14 (2006.01); B01D 53/18 (2006.01); B01D 53/62 (2006.01); B01D 53/78 (2006.01)
CPC B01D 53/75 (2013.01) [B01D 53/1406 (2013.01); B01D 53/1475 (2013.01); B01D 53/1493 (2013.01); B01D 53/18 (2013.01); B01D 53/62 (2013.01); B01D 53/78 (2013.01); B01D 2251/304 (2013.01); B01D 2251/606 (2013.01); B01D 2252/103 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An apparatus for purifying gas, wherein the apparatus comprises at least two ejector stages, in which each ejector stage comprises at least one ejector, for treating a gas in a multistage treatment and for absorbing the gas to a liquid, and the apparatus comprises:
at least one feeding device for injecting a pressurized motive medium which comprises liquid, steam or gaseous agent at high pressure to at least one ejector of the first ejector stage and at least one supplying device for sucking the gas into the same ejector in which the gas is mixed with the motive medium for forming a mixture comprising a gas phase and a liquid phase,
at least one separation device for separating at least a part of the gas phase from the mixture after the first ejector stage to form a liquid phase,
at least one second feeding device for injecting a second or later motive medium which comprises liquid, steam or gaseous agent to a second or later ejector stage which comprises at least one ejector and at least one gas phase supplying device for supplying at least a part of the gas phase of the mixture to the same ejector in which the gas phase is mixed with the second or later motive medium for forming a second or later mixture,
at least one separation device for separating at least a part of the gas phase from the second or later mixture after the second or later ejector stage to form a purified gas,
at least one regeneration device for treating at least a part of the separated liquid phase by a regeneration for removing carbon dioxide and other impurities from the liquid phase and/or for recovering a desired chemical compound from the liquid phase at least after the first separation stage, wherein at least a part of the regenerated liquid phase is arranged to be supplied back to the motive medium of the same first ejector stage, and
at least one addition device for adding an additive to at least one of the mixtures for removing impurities of the gas.