Method and system for capturing carbon dioxide in flue gas
A carbon dioxide and flue gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of absorbent degradation, large ammonia volatilization, high reconstruction costs, etc., to reduce volatilization, reduce difficulty and cost, and reduce reconstruction fee effect
Active Publication Date: 2022-07-15
湖南同丰清碳科技有限公司
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[0008] The main purpose of the present invention is to provide a method and system for capturing carbon dioxide in flue gas, aiming to solve the problems of high energy consumption, high reconstruction cost, large ammonia volatilization, and degradation of absorbent in the prior art
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[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0052] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship, movement situation, etc. If the specific posture changes, the directional indication changes accordingly.
[0053] In addition, descriptions such as "first", "second", etc. in the present invention are only for descriptive purposes, and should not be ...
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Abstract
The invention provides a method for capturing carbon dioxide in flue gas, comprising the steps of: transporting the flue gas containing carbon dioxide to an absorption device for carbon dioxide absorption to obtain absorption liquid and purified gas; Desorption is carried out in the anode chamber of the device to obtain a gas-liquid mixture containing metal / ammonia complex compounds and carbon dioxide; the gas-liquid mixture is subjected to gas-liquid separation treatment to obtain carbon dioxide gas and a separation liquid; the separation liquid is transported to the In the cathode chamber of the electrolytic absorption device, the separation liquid is subjected to electrodeposition in the cathode chamber to deposit metal and ammonia-containing solution; the ammonia-containing solution is transported to the absorption device for carbon dioxide absorption again. The invention proposes a new system for capturing carbon dioxide in flue gas, which can significantly reduce energy consumption and input cost, reduce ammonia volatilization, and avoid degradation of absorbent under the premise of efficient purification and separation of carbon dioxide in flue gas.
Description
technical field [0001] The invention relates to the field of gas purification and separation, in particular to a method for capturing carbon dioxide in flue gas and a capturing system. Background technique [0002] In recent years, global warming caused by greenhouse gases, especially carbon dioxide, has become a worldwide concern. However, up to now, the environmental problems caused by carbon dioxide are still very prominent. Therefore, how to effectively capture carbon dioxide in flue gas is an urgent problem to be solved. [0003] Today, the only post-combustion carbon dioxide capture process in the world that has reached commercial operation is the thermally regenerated amine capture process, which uses thermal carbon capture technology and uses organic amines as absorbents. Although it can effectively capture carbon dioxide, due to its economic constraints of high energy consumption, high reconstruction costs, and technical constraints of absorbent degradation, the la...
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IPC IPC(8): B01D53/78B01D53/96B01D53/62B01D3/06B01D5/00B01D53/48
CPCB01D53/78B01D53/965B01D53/62B01D3/06B01D5/009B01D53/48B01D2252/102B01D2257/504Y02P70/10
Inventor 王长红蒋凯琦柴立元李帅向开松
Owner 湖南同丰清碳科技有限公司