Method for capturing carbon dioxide in flue gas of power plant

A carbon dioxide and flue gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of low capture efficiency, achieve the effects of reducing manufacturing costs, controlling corrosion, and promoting absorption

Inactive Publication Date: 2021-07-20
重庆丰淼生态环境科技有限责任公司
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Problems solved by technology

[0005] The present invention intends to provide a method for capturing carbon dioxide in power plant flue gas to solve the problem that the prior art uses MEA as a capture solvent, and the capture efficiency is about 90%, and the capture efficiency is low

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  • Method for capturing carbon dioxide in flue gas of power plant

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Embodiment

[0034] A method for capturing carbon dioxide in power plant flue gas, comprising the following steps:

[0035] Step 1: remove the mechanical impurities contained in the flue gas of the power plant by gravity sedimentation, and then pass the removed flue gas through activated carbon, and use the activated carbon to filter out the free water and sulfur dioxide in the flue gas of the power plant to obtain filtered flue gas. The temperature of the filtered flue gas at the time is 68-80°C.

[0036] Step 2: pressurize the filtered flue gas to 5.7Mpa, and then guide it into the cooler to cool to 15°C.

[0037] Step 3, the cooled and pressurized filtered flue gas is introduced from the bottom of the decarbonization absorption tower, and the semi-lean amine liquid is introduced from the upper part of the decarbonization absorption tower, and the filtered flue gas and semi-lean amine liquid will be in the decarbonization absorption tower The relative impact occurs in the interior, and ...

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Abstract

The invention belongs to the technical field of treatment of carbon dioxide in flue gas through an absorption solvent, and discloses a method for capturing carbon dioxide in flue gas of a power plant, which comprises the following steps: firstly, removing mechanical impurities in the flue gas of the power plant in a gravity settling manner, and then enabling the flue gas of the power plant to pass through activated carbon to obtain filtered flue gas; introducing the filtered flue gas into a decarburization absorption tower to be in contact with a semi-lean amine solution to complete removal of carbon dioxide to obtain wet purified gas; and finally, carrying out gas-liquid separation on the wet purified gas, and discharging the gas. The semi-lean amine solution is prepared from deionized water, N-methyldiethanolamine, monoethanolamine, 1-hydroxyethylidene-1,1-diphosphonic acid, etidronate disodium, polyacrylic acid, hydroxyl silicone oil, tetradecyldimethylbenzylammonium chloride and sodium sulfite. The method solves the problems that MEA is used as a trapping solvent in the prior art, the trapping efficiency is about 90%, and the trapping efficiency is low.

Description

technical field [0001] The invention belongs to the technical field of treating carbon dioxide in flue gas by absorbing a solvent, and in particular relates to a method for capturing carbon dioxide in flue gas of a power plant. Background technique [0002] At the 75th session of the United Nations General Assembly, my country put forward the goal of "strive to reach the peak of carbon dioxide emissions before 2030 and strive to achieve carbon neutrality before 2060", contributing to the reform and improvement of the global governance system. There will be a lot of power plant flue gas in the power system, and the main components of power plant flue gas are carbon dioxide, sulfur dioxide, water vapor, nitrogen and oxygen, and direct emission will have a very large impact on the environment. In order to meet the goals proposed by the country, it is necessary to treat the flue gas of the power plant before discharging it. The treatment effect of carbon dioxide in power plant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D53/145B01D53/1437B01D53/1418B01D2252/504B01D2258/0283Y02A50/20Y02C20/40
Inventor 李利民王践陈懿刘剑锋
Owner 重庆丰淼生态环境科技有限责任公司
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