CO2 Capture Device with Heat Absorption for Waste Heat Utilization
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Solution Overview
Problem
Existing CO2 capture devices face low waste heat utilization efficiency due to inefficient heat transfer to the CO2 adsorption member, as seen in Japanese Patent No. 5914300 B, which heats the adsorption member in a contactless manner.
Innovation Solution
A CO2 capture device design that includes a channel with a CO2 adsorption member and a heat absorption member, where a fluid is passed through the heat absorption member to directly heat the CO2 adsorption member, enhancing waste heat utilization by direct heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contactless heating is used to heat the CO2 adsorption member, then the structure is simple and easy to operate, but heat transfer efficiency is low resulting in poor waste heat utilization
Solution Approach 1:
The patent introduces a heat absorption member as an intermediary between the heat source (flue gas) and the CO2 adsorption member. This intermediary directly contacts both the heat source and the adsorption member, enabling efficient heat transfer without requiring complex contactless heating mechanisms, thus resolving the contradiction between operational simplicity and heat transfer efficiency.
Solution Approach 2:
The patent utilizes fluid (flue gas) flow through the heat absorption member to transfer heat. By employing pneumatic flow of the fluid carrier, heat is efficiently transferred from the hot flue gas through the heat absorption member to the CO2 adsorption member, achieving high waste heat utilization without complex heating equipment.
2Loss of energy
If direct contact heating is used to improve heat transfer efficiency, then waste heat utilization improves, but device complexity increases due to additional components
Solution Approach 1:
The heat absorption member serves multiple functions: it absorbs heat from the flue gas, transfers heat to the CO2 adsorption member, and can be integrated into the existing channel structure. This multi-functionality reduces the need for separate heating systems, thereby improving waste heat utilization without significantly increasing device complexity.
Solution Approach 2:
The patent merges the heat absorption function with the existing channel structure by disposing the heat absorption member within the channel. This integration combines multiple functions (heat absorption, heat transfer, and structural support) into a single component, achieving efficient heat transfer while minimizing additional complexity.
3Loss of energy
If fluid is passed through the heat absorption member via the CO2 adsorption member, then heat transfer efficiency is maximized, but the risk of contaminating the CO2 adsorption member increases
Solution Approach 1:
The heat absorption member acts as a protective intermediary barrier between the fluid (flue gas) and the CO2 adsorption member. Heat is transferred through this barrier, maximizing heat transfer efficiency while preventing direct contact between the fluid and the adsorption member, thus eliminating contamination risk.
Solution Approach 2:
The patent segments the heating process by separating the fluid flow path from the CO2 adsorption member using the heat absorption member. This segmentation allows independent optimization of heat transfer (through the absorption member) and protection of the adsorption member from contamination, resolving the contradiction between efficiency and reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves waste heat utilization efficiency by directly transferring heat from the CO2 adsorption member to the heat absorption member, allowing for efficient CO2 capture and regeneration of the adsorption member.
Implementation Method 1
a heat absorption member disposed next to the first CO2 adsorption member in the channel... the fluid is passed through the heat absorption member via the first CO2 adsorption member heated to desorb CO2 to heat the heat absorption member
Implementation Method 2
CO2 capture devices that capture CO2 contained in gas using a CO2 adsorption member (i.e., a solid adsorption member)... configured to capture CO2 by heating the CO2 adsorption member to desorb CO2 from the CO2 adsorption member
Data Source
AI summary
A CO2 capture device according to the present disclosure includes: a channel through which gas is passed; a first CO2 adsorption member and a heat absorption member that are disposed in the channel; a first insertion port through which a fluid is inserted into the channel in such a manner that the fluid flows through the heat absorption member via the first CO2 adsorption member; and a second insertion port through which the fluid is inserted into the channel in such a manner that the fluid flows through the first CO2 adsorption member via the heat absorption member. The fluid is passed through the heat absorption member via the heated first CO2 adsorption member to heat the heat absorption member. When heating the first CO2 adsorption member, the fluid is passed through the first CO2 adsorption member via the heat absorption member to heat the first CO2 adsorption member.