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Acidic gas collection system and acidic gas collection apparatus

A technology of acid gas and recovery system, which is applied in the direction of gas treatment, membrane technology, and dispersed particle separation, etc. It can solve the problems of larger installation area and higher energy of carbon dioxide separation and recovery, and achieve the effect of cost reduction

Inactive Publication Date: 2014-12-24
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the vacuum distillation method has problems in that the installation area becomes larger and a heat source for distillation is required.
In addition, considering the whole plant, there is room for improvement such as higher energy for separation and recovery of carbon dioxide (for example, refer to Patent Document 1)

Method used

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  • Acidic gas collection system and acidic gas collection apparatus
  • Acidic gas collection system and acidic gas collection apparatus
  • Acidic gas collection system and acidic gas collection apparatus

Examples

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Embodiment Construction

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0020] figure 1 It is a figure which shows the structure of the acid gas recovery apparatus of embodiment. in addition, figure 2 It is a figure which shows the structure of the amine solution regeneration apparatus which is a part of it. The acid gas recovery system of the embodiment is achieved by, for example, figure 1 The acid gas recovery unit shown can be realized.

[0021] The gas to be processed which is the object of the embodiment contains a plurality of types of acid gases with different acidities. That is, it is an acid gas mixture containing strong acid gas and weak acid gas. An example of this is gases containing carbon dioxide derived from the combustion process of fossil fuels such as coal. Such an acidic gas mixture generally contains nitrogen oxides and sulfur oxides which are strongly acidic gases as trace components in addition to carbon dioxid...

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Abstract

A gas collection method comprises contacting a gas mixture including a weak acidic gas and a strong acidic gas with amine solution that absorbs a first portion of the gas mixture. After this first contacting step the gas mixture is contacted with amine solution that absorbs a second portion of the mixture. The amine solution after the second contacting step is heated to discharge at least some portion of the weak acid gas component absorbed therein. The method also includes adding an alkaline compound to the amine solution to generate a salt by reaction with the strong acidic component. The salt is separated from the amine solution and this amine solution can be used in the second contacting step.

Description

technical field [0001] Embodiments of the present invention relate to an acid gas recovery system and an acid gas recovery device that recover acid gas, especially carbon dioxide, contained in combustion exhaust gas that uses fossil fuels, especially coal, as fuel, using an amine solution. Background technique [0002] Due to the recent global warming, efforts have been made to suppress the emission of greenhouse gases worldwide, and as one of them, the emission suppression of carbon dioxide has been studied. As a facility that emits carbon dioxide, there is a power generation system utilizing combustion of fossil fuels. As an alternative power generation system for suppressing exhaust gas emissions, a power generation system utilizing natural energy and a nuclear power generation system are being promoted. On the other hand, development related to current power generation systems, such as energy saving and high power generation efficiency, is being actively carried out. I...

Claims

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Application Information

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IPC IPC(8): B01D53/18
CPCB01D53/1406B01D53/1425B01D53/1456B01D53/501B01D53/56B01D2251/304B01D2251/40B01D2252/204B01D2257/302B01D2257/404B01D2257/504B01D2258/0283B01D53/1462B01D53/1493B01D53/40B01D53/62B01D53/96
Inventor 土屋直实小川斗程塚正敏
Owner KK TOSHIBA