Method for controlling absorbent at decarboxylation facility and system therefor

• US 20010021362A1
• Filed: 03/09/2001
• Published: 09/13/2001
• Est. Priority Date: 03/10/2000
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries Engineering, Ltd. (Mitsubishi Heavy Industries, Ltd.)
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Ishida, Kazuo
• Granted Patent: US 6,579,508 B2
• Time in Patent Office: Days
• US Class Current: 423/228
• 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 temperature controller 52 for the circulating water to the washing section of the absorption tower 3 or a temperature controller 61 for the circulating water to the cooling tower 2 is controlled by tower bottom liquid level control means 51 to control the temperature of the circulating water to the washing section, whereby the concentration of amine in the absorbent is regulated.

Claims

1. A method for controlling absorbent at a decarboxylation facility provided with an absorption tower having an amine recovery section and a regeneration tower, wherein a temperature controller for circulating water to the washing section of the absorption tower is controlled by a controller of the liquid level of the bottom of the absorption tower to control the temperature of the circulating water to the washing section, 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 control method using said a controller of the liquid level of the bottom of the absorption tower involves sample PI control.

2. A method for controlling absorbent at a decarboxylation facility provided with an absorption tower having an amine recovery section and a regeneration tower, wherein a temperature controller for circulating water to a cooling tower for the absorption tower is controlled by a controller of the liquid level of the bottom of the absorption tower to control the temperature of the circulating water to the cooling tower, whereby the concentration of amine in said absorbent is regulated.

4. A system for controlling absorbent at a decarboxylation facility provided with an absorption tower having an amine recovery section and a regeneration tower, wherein said system comprises a controller of the liquid level of the bottom of the absorption tower and temperature controller for circulating water to the washing section of the absorption tower controlled by said controller of the liquid level of the bottom of the absorption tower.

5. A system for controlling absorbent at a decarboxylation facility provided with an absorption tower having an amine recovery section and a regeneration tower, wherein said system comprises a controller of the liquid level of the bottom of the absorption tower and a temperature controller for circulating water to a cooling tower for the absorption tower controlled by said controller of the liquid level of the bottom of the absorption tower.

6. A system for controlling absorbent at a decarboxylation facility provided with an absorption tower having an amine recovery section and a regeneration tower, wherein said system comprises a controller of the liquid level of the bottom of the absorption tower, temperature controller for circulating water to the washing section of the absorption tower controlled by said controller of the liquid level of the bottom of the absorption tower, and a temperature controller for circulating water to a cooling tower for the absorption tower controlled by said controller of the liquid level of the bottom of the absorption tower.