Method for separating acid gases from an aqueous flow of fluid

    公开(公告)号:AU2013311886A1

    公开(公告)日:2015-03-19

    申请号:AU2013311886

    申请日:2013-08-19

    Applicant: BASF SE

    Abstract: A method for separating acid gases from an aqueous flow of fluid is described, according to which method a) the aqueous flow of fluid is brought into contact in an absorption area with an absorbent which contains at least one amine, wherein a deacidified flow of fluid and an absorbent charged with acid gases are obtained; b) the deacidified flow of fluid is brought into contact in a washing area with an aqueous washing fluid in order to transfer, at least partially, carried amine into the washing fluid, wherein a deaminated, deacidified flow of fluid and an amine-charged washing fluid are obtained; c) the deaminated, deacidified flow of fluid is cooled downstream of the washing area, wherein an absorber top condensate is condensed out of the deaminated, deacidified flow of fluid; d) the charged absorbent is guided into a desorption area in which the acid gases are at least partially released, wherein a regenerated absorbent and desorbed acid gases are obtained; e) the regenerated absorbents are guided back into the absorption area in order to form an absorbent cycle; f) the amine-charged washing fluid and the absorber top condensate are introduced into the absorbent cycle; and g) the desorbed acid gases are guided through a reinforcement area and the acid gases coming out of the top of the reinforcement area are cooled, in order to condense a desorber top condensate out of the acid gases, which desorber top condensate is partially guided back into the reinforcement area and is partially guided out of the method. The method allows an efficient retention of amines from the treated flows of fluid while maintaining the water balance of the acid gas removal installation.

    Removing acid gases from water vapour-containing fluid streams

    公开(公告)号:AU2013225124A1

    公开(公告)日:2014-09-25

    申请号:AU2013225124

    申请日:2013-02-26

    Applicant: BASF SE

    Abstract: A process for removing acid gases from a water vapour-containing fluid stream (1) comprises a) providing an absorption liquid (16) which is incompletely miscible with water; b) treating the fluid stream (1) in an absorption zone (3) with the absorption liquid (16) to obtain an acid gas-depleted treated fluid stream (4) and an acid gas-loaded absorption liquid (7); c) directing the treated fluid stream (4) to a rehydration zone (5) and treating the fluid stream (4) with an aqueous liquid (22) to volatilize at least part of the aqueous liquid; d) regenerating (12) the loaded absorption liquid (9, 11) to expel the acid gases (17) at least in part and obtain a regenerated absorption liquid (13), and directing the regenerated absorption liquid (13, 14, 16) to step b); and e) separating (8), from the absorption liquid (7), an aqueous liquid (22) that has condensed in the absorption zone (3), and directing the aqueous liquid (22) to step c). The process allows for an efficient removal of water accumulated in the absorption liquid system.

    Removing sulphur oxides from a fluid stream

    公开(公告)号:AU2013224898A1

    公开(公告)日:2014-09-25

    申请号:AU2013224898

    申请日:2013-03-01

    Abstract: A process for removing sulphur oxides from a fluid stream,such as flue gas, that comprises a) providing a non-aqueous absorption liquid containing at least one hydrophobic amine, the non-aqueous absorption liquid being incompletely miscible with water; b) treating the fluid stream in an absorption zone with the non-aqueous absorption liquid to transfer at least part of the sulphur oxides into the non-aqueous absorption liquid and to form a sulphur oxide-hydrophobic amine-complex; c)causing the non-aqueous absorption liquid to be in liquid-liquid contact with an aqueous liquid where by at least part of the sulphur oxide-hydrophobic amine-complex is hydrolyzed to release the hydrophobic amine and sulphurous hydrolysis products, and at least part of the sulphurous hydrolysis products is transferred into the aqueous liquid; d)separating the aqueous liquid from the non-aqueous absorption liquid. The process mitigates absorbent degradation problems caused by sulphur dioxide and oxygen in flue gas.

    REMOVING SULPHUR OXIDES FROM A FLUID STREAM

    公开(公告)号:CA2866105A1

    公开(公告)日:2013-09-06

    申请号:CA2866105

    申请日:2013-03-01

    Abstract: A process for removing sulphur oxides from a fluid stream,such as flue gas, that comprises a) providing a non-aqueous absorption liquid containing at least one hydrophobic amine, the non-aqueous absorption liquid being incompletely miscible with water; b) treating the fluid stream in an absorption zone with the non-aqueous absorption liquid to transfer at least part of the sulphur oxides into the non-aqueous absorption liquid and to form a sulphur oxide-hydrophobic amine-complex; c)causing the non-aqueous absorption liquid to be in liquid-liquid contact with an aqueous liquid where by at least part of the sulphur oxide-hydrophobic amine-complex is hydrolyzed to release the hydrophobic amine and sulphurous hydrolysis products, and at least part of the sulphurous hydrolysis products is transferred into the aqueous liquid; d)separating the aqueous liquid from the non-aqueous absorption liquid. The process mitigates absorbent degradation problems caused by sulphur dioxide and oxygen in flue gas.

    REMOVING ACID GASES FROM WATER VAPOUR-CONTAINING FLUID STREAMS

    公开(公告)号:CA2866090A1

    公开(公告)日:2013-09-06

    申请号:CA2866090

    申请日:2013-02-26

    Applicant: BASF SE

    Abstract: A process for removing acid gases from a water vapour-containing fluid stream (1) comprises a) providing an absorption liquid (16) which is incompletely miscible with water; b) treating the fluid stream (1) in an absorption zone (3) with the absorption liquid (16) to obtain an acid gas-depleted treated fluid stream (4) and an acid gas-loaded absorption liquid (7); c) directing the treated fluid stream (4) to a rehydration zone (5) and treating the fluid stream (4) with an aqueous liquid (22) to volatilize at least part of the aqueous liquid; d) regenerating (12) the loaded absorption liquid (9, 11) to expel the acid gases (17) at least in part and obtain a regenerated absorption liquid (13), and directing the regenerated absorption liquid (13, 14, 16) to step b); and e) separating (8), from the absorption liquid (7), an aqueous liquid (22) that has condensed in the absorption zone (3), and directing the aqueous liquid (22) to step c). The process allows for an efficient removal of water accumulated in the absorption liquid system.

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