Method for controlling absorbent at decarboxylation facility and system therefor

• US 6,579,508 B2
• Filed: 03/09/2001
• Issued: 06/17/2003
• Est. Priority Date: 03/10/2000
• Status: Expired due to Term

• Current Assignee: Mitsubishi Heavy Industries Engineering, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Ishida, Kazuo
• Primary Examiner(s): Silverman, Stanley S.
• Assistant Examiner(s): Vanoy, Timothy C.
• Application Number:
  US09/801,814
• Publication Number:
  US 20010021362A1
• Time in Patent Office: 830 Days
• Field of Search: 422/106, 422/108, 423/220, 423/228, 423/229, 423/DIG.5, 423/DIG.6
• US Class Current: 423/220
• CPC Class Codes: B01D 53/1412 Controlling the absorption process
• CPC Class Codes: B01D 53/1456 Removing acid components
• CPC Class Codes: B01D 53/62 Carbon oxides
• CPC Class Codes: Y10S 423/05 Automatic, including computer, control
• CPC Class Codes: Y10S 423/06 Temperature control

Abstract

A method for controlling absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, including controlling a temperature controller for controlling a temperature of circulating water forwarded to the amine recovery section of the absorption tower by a controller which controls a liquid level at the bottom of the absorption tower, whereby the concentration of amine in the absorbent is regulated.

Claims

1. A method for controlling absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, the method comprising controlling a temperature controller for controlling a temperature of circulating water forwarded to the amine recovery section of the absorption tower by a controller which controls a liquid level at the bottom of the absorption tower, whereby the concentration of amine in said absorbent is regulated.

3. The method for controlling absorbent at a decarboxylation facility according to claim 1 or 2, wherein the controlling said controller for controlling the liquid level at the bottom of the absorption tower includes utilizing sample Proportional plus Integral control.

2. A method for controlling absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, the method comprising controlling a temperature controller for controlling a temperature of circulating water forwarded to a cooling tower connected in an upstream position of the absorption tower by a controller which controls a liquid level at the bottom of the absorption tower, whereby the concentration of amine in said absorbent is regulated.

4. A method for regulating concentration of amine in absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, the method comprising:

monitoring a liquid level at the bottom of the absorption tower; and

controlling a temperature circulating water forwarded to the amine recovery section of the absorption tower based on the liquid level.

5. The method for regulating concentration of amine in absorbent at a decarboxylation facility according to claim 4 wherein the controlling said controller for controlling the liquid level at the bottom of the absorption tower includes utilizing sample Proportional plus Integral control.

6. A method for regulating concentration of amine in absorbent at a decarboxylation facility with an absorption tower having an amine recovery section and a regeneration tower, the method comprising:

monitoring a liquid level at the bottom of the absorption tower; and

controlling a temperature circulating water forwarded to a cooling tower connected in an upstream position of the absorption tower based on the liquid level.

7. The method for regulating concentration of amine in absorbent at a decarboxylation facility according to claim 6, wherein the controlling said controller for controlling the liquid level at the bottom of the absorption tower includes utilizing sample Proportional plus Integral control.