Combined absorption carbon dioxide trapping and compressing treatment technology

A technology for carbon dioxide, compression treatment, applied in inorganic chemistry, carbon compounds, chemical instruments and methods, etc., can solve problems that have not yet been discovered

Inactive Publication Date: 2016-01-27
BEIJING UNIV OF CHEM TECH
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  • Combined absorption carbon dioxide trapping and compressing treatment technology

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[0029] In order to better illustrate the feasibility of the present invention and the adopted technical solutions to achieve the intended purpose of the invention, the process and specific implementation methods proposed by the present invention will be described in detail in conjunction with the accompanying drawings. It should be declared that the following examples of implementation are illustrative rather than limiting, and the protection scope of the present invention cannot be limited by the following examples of implementation.

[0030] Field of application of the process of the present invention (high pressure rich CO 2 Carbon capture of gas flow), the conditions of the pretreated feed gas are set as follows: pressure 4.0MPa, temperature 38.0°C, volume percentage composition of hydrogen 58.4%, CO 2 41.0%, hydrogen sulfide 0.6%, molar flow rate 1000kmol / h. Establish the process flow shown in the accompanying drawings, calculate the process of the present invention to c...

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Abstract

The invention relates to a combined absorption carbon dioxide trapping and compressing treatment technology, and belongs to the field of decarburization and carbon dioxide emission reduction. A physical absorption method and a chemical absorption method are combined in the technology, and high pressure absorption-middle pressure desorption is carried out to realize high efficiency and low energy consumption decarburization. The technology comprises the following steps: carbon-containing airflow enters a physical trapping process and is desulfurized, the desulfurized airflow goes through a physical absorption tower and undergoes an affiliated process to remove most carbon dioxide, and the obtained airflow undergoes a chemical trapping process to remove residual carbon dioxide; a sulfur-containing rich solution undergoing desulphurization regeneration and a carbon-containing physical adsorbent-rich solution undergoing multistage flash evaporation generation respectively return to a physical absorption tower; a chemical adsorbent-rich solution undergoing thermal desorption regeneration returns to a chemical absorption tower; and carbon dioxide discharged from a flash evaporation tank and a desorption tower undergoes multi-stage compression to meet geological storage conditions. A heat exchanger is used in a technologic system to recover heat, and an expander is used to recover work. The combined absorption carbon dioxide trapping and compressing treatment technology has the advantages of high carbon trapping rate, low energy consumption, and suitableness for large-scale carbon trapping and compression treatment of high-pressure carbon dioxide-rich airflow.

Description

technical field [0001] The invention belongs to the technical field of decarbonization and carbon dioxide emission reduction, and is applicable to the decarbonization treatment of medium-high pressure carbon dioxide-rich gas flow in industrial processes, or carbon dioxide capture and carbon dioxide compression treatment for achieving storage conditions, and specifically relates to a combined absorption carbon dioxide capture Set with compression process. Background technique [0002] my country's coal-based energy structure will continue for a long time, and rapid economic development has resulted in a large amount of carbon dioxide (CO 2 )emission. To achieve sustainable economic development, it is urgent to promote CO 2 Development and application of capture and storage technologies. [0003] There are three main ways of carbon capture: pre-combustion carbon capture, oxyfuel combustion and post-combustion carbon capture. In terms of technology investment, carbon captur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/78B01D3/06C01B31/20C01B32/50
CPCY02A50/20Y02C20/40Y02P20/151Y02P70/10
Inventor 郑丹星黄维佳
Owner BEIJING UNIV OF CHEM TECH
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