RECLAIMING APPARATUS AND RECLAIMING METHOD

• US 20130087041A1
• Filed: 07/26/2011
• Published: 04/11/2013
• Est. Priority Date: 10/19/2009
• Status: Active Grant

• Current Assignee: Kansai Electric Power Company Incorporated, Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Kansai Electric Power Company Incorporated, Mitsubishi Heavy Industries, Ltd.
• Inventors: Iijima, Masaki, Tatsumi, Masahiko, Yagi, Yasuyuki, Ogura, Kouki
• Granted Patent: US 9,254,462 B2
• Time in Patent Office: Days
• US Class Current: 95/24
• CPC Class Codes: B01D 19/0005 with one or more auxiliary substances
• CPC Class Codes: B01D 53/1412 Controlling the absorption process
• CPC Class Codes: B01D 53/1425 Regeneration of liquid absorbents
• CPC Class Codes: B01D 53/1462 Removing mixtures of hydrogen sulfide and carbon dioxide
• CPC Class Codes: Y02C 20/40 of CO2
• CPC Class Codes: Y10S 502/517 Sulfur or sulfur compound removal
• CPC Class Codes: Y10S 502/518 Carbonaceous contaminant

Abstract

In a reclaiming apparatus (106) that includes an airtight container (106a) as an absorbent storing unit that stores a part of an absorbent that absorbs CO₂ included in an exhaust gas and a heating unit that heats the absorbent stored in the airtight container (106a), a part of the absorbent stored in the airtight container (106a) is distributed, and a gaseous body is brought into counterflow contact with the absorbent that is distributed. As a result, since the gaseous body is brought into counterflow contact with a part of the absorbent stored in the absorbent storing unit, an absorbent component volatilizes and is separated from a degraded material, and the absorbent component can be extracted from the degraded material, whereby a loss of the absorbent can be reduced.

Claims

1-15. -15. (canceled)

16. A reclaiming apparatus comprising:

an absorbent storing unit that stores a part of an absorbent that has absorbed CO₂ or H₂S included in a gas;

a heating unit that heats the absorbent stored in the absorbent storing unit

an absorbent distributing unit that forms a circulation mechanism that extracts a part of the absorbent stored in the absorbent storing unit and returns the extracted part to the absorbent storing unit for distribution;

a steam supplying unit that generates steam from the absorbent that is heated by the heating unit;

an absorbent component extracting unit that is disposed in the absorbent storing unit and brings the absorbent that is returned to the absorbent storing unit in counterflow contact with the steam of the steam supplying unit; and

a dry steam supplying unit that supplies dry steam having a temperature higher than a temperature to which the absorbent is heated to the absorbent storing unit, wherein

a part of the absorbent stored in the absorbent storing unit is distributed, and a gaseous body is brought into counterflow contact with the distributed absorbent.

17. The reclaiming apparatus according to claim 16, further comprising:

an absorbent distributing unit that extracts and distributes a part of the absorbent that is stored in the absorbent storing unit;

a steam supplying unit that supplies steam generated outside the reclaiming apparatus; and

an absorbent component extracting unit that brings the absorbent extracted by the absorbent distributing unit in counterflow contact with the steam of the steam supplying unit.

18. The reclaiming apparatus according to claim 16, further comprising:

an absorbent distributing unit that extracts and distributes a part of the absorbent that is stored in the absorbent storing unit;

a gas supplying unit that supplies the gas in which CO₂ or H₂S is absorbed; and

an absorbent component extracting unit that brings the absorbent extracted by the absorbent distributing unit in counterflow contact with the gas of the gas supplying unit.

19. The reclaiming apparatus according to claim 16, further comprising a packed bed that brings the absorbent and the steam in gas-liquid contact with each other.

20. The reclaiming apparatus according to claim 16, further comprising:

a pump that extracts and raises a part of the absorbent from the absorbent storing unit; and

a nozzle that causes the absorbent pumped up by the pump to flow down against the steam that rises.

24. The reclaiming method according to claim 16, further comprising:

measuring an amount of an absorbent component included in the absorbent by sampling the stored absorbent; and

ending the processes in a case where the measured amount of the absorbent component arrives at a predetermined amount or less.

25. The reclaiming method according to claim 16, wherein the heating of the stored absorbent includes maintaining a pressure of steam at a predetermined pressure by performing heat exchange between the absorbent and the steam in a non-contact manner.

26. The reclaiming method according to claim 25, wherein the pressure of the steam is maintained at 2 to 3 [kg/cm²G].

21. A reclaiming method comprising:

storing a part of an absorbent that absorbs CO₂ or H₂S included in a gas;

heating the stored absorbent;

bringing a part of the stored absorbent into counterflow contact with a gaseous body while the part is distributed;

distributing the absorbent by circulating a part of the stored adsorbent solution;

bringing steam of the heated absorbent and the circulated absorbent into counterflow contact with each other; and

bringing the absorbent, of which a part is circulated, in counterflow contact with dry steam having a temperature higher than a temperature to which the absorbent is heated.

22. The reclaiming method according to claim 21, further comprising:

extracting and distributing a part of the stored absorbent; and

bringing steam that is externally generated into counterflow contact with the extracted absorbent.

23. The reclaiming method according to claim 21, further comprising:

extracting and distributing a part of the stored absorbent; and

bringing the gas in which CO₂ or H₂S is absorbed in counterflow contact with the extracted absorbent.