Carbon dioxide capture device and carbon dioxide capture method

The carbon dioxide recovery apparatus optimizes the heating of absorbent liquid before entering the regeneration tower, addressing energy inefficiencies in existing systems by efficiently desorbing carbon dioxide and reducing energy consumption.

JP2026091438APending Publication Date: 2026-06-04TAKUMA CO LTD
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Patent Information

Application Number
JP2024204478
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-11-25
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

Existing carbon dioxide recovery methods require significant energy for heating the absorption liquid, leading to increased costs and inefficiencies due to decreased heating efficiency as the temperature rises, particularly in systems using heat pumps.

Method used

A carbon dioxide recovery apparatus that circulates absorbent liquid between an absorption tower and a regeneration tower, where the absorbent is heated via a heat transfer medium to desorb carbon dioxide before entering the regeneration tower, optimizing conditions for efficient desorption and reducing energy consumption.

Benefits of technology

The system effectively utilizes energy for carbon dioxide desorption, suppresses heating inefficiencies, and reduces overall energy requirements, thereby enhancing the efficiency and cost-effectiveness of carbon dioxide recovery.

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Abstract

The present invention provides a carbon dioxide capture device and a carbon dioxide capture method that can efficiently capture carbon dioxide while suppressing the energy required for carbon dioxide capture. [Solution] A carbon dioxide recovery device 10 circulates an absorbent liquid between an absorption tower 11 and a regeneration tower 12 via a rich liquid supply pipe 13 and a lean liquid supply pipe 14, allowing carbon dioxide to be absorbed by the absorbent liquid in the absorption tower 11 and recovered in the regeneration tower 12. The device includes a heating means (heat pump) 33 that heats the absorbent liquid, which is supplied to the regeneration tower 12 via the rich liquid supply pipe 13 after absorbing carbon dioxide in the absorption tower 11, through heat exchange with a heat transfer medium. The heating means 33 is set to processing conditions that cause carbon dioxide to be released from the absorbent liquid.
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