Method and Application for Capturing and Converting Carbon Dioxide in Industrial Flue Gas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing carbon dioxide capture methods in industrial settings, such as chemical absorption and high-pressure liquefaction, are complex, unsafe, and costly, posing challenges for large-scale industrial applications.
Innovation Solution
A method involving a cyclone separator where industrial flue gas and fresh air are introduced to create rotating flows, forming a 'super-heavy centrifugal cryogenic pressure field' for carbon dioxide capture and conversion, producing carbonic acid under controlled temperature and pressure conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical absorption or high-pressure liquefaction methods are used to capture carbon dioxide, then carbon dioxide capture capability is improved, but device complexity and safety risks increase
Solution Approach 1:
The invention changes the temperature and pressure parameters to create a cryogenic environment (below 10°C, preferably -20°C to 0°C) combined with high centrifugal force (50-200 times gravity). This parameter change enables carbon dioxide to be directly converted to dry ice particles through physical phase change rather than chemical absorption, simplifying the process while maintaining capture effectiveness
Solution Approach 2:
The invention replaces complex chemical absorption systems with a mechanical centrifugal separation system. The cyclone separator uses centrifugal force to separate carbon dioxide from flue gas and directly convert it to dry ice particles, eliminating the need for complex chemical reagents and absorption towers
2Productivity
If high-pressure liquefaction is used to capture and store carbon dioxide, then carbon dioxide capture efficiency is improved, but safety risks and operational hazards increase
Solution Approach 1:
The invention utilizes phase transition of carbon dioxide from gas to solid (dry ice) through cryogenic cooling and centrifugal compression. This phase transition occurs at controlled temperatures below 10°C and pressures above 0.12 MPa, converting carbon dioxide into stable solid particles that can be safely collected and utilized, eliminating safety risks associated with high-pressure liquefaction
Solution Approach 2:
The invention uses readily available flue gas as the carbon source and converts it directly to dry ice particles through simple physical processes. The method avoids expensive specialized equipment and reagents, using instead a straightforward cryogenic centrifugal separation process that is both economical and safe
3Reliability
If conventional carbon dioxide capture methods are implemented, then carbon dioxide separation is achieved, but operational complexity and maintenance difficulties increase
Solution Approach 1:
The invention segments the carbon dioxide capture process into distinct functional zones within the cyclone separator: the upper portion receives and cools flue gas, the lower portion introduces refrigerant, and the outer wall applies centrifugal force. This segmentation allows each zone to perform its specific function efficiently, simplifying operation and maintenance
Solution Approach 2:
The cyclone separator design allows the system to self-regulate the separation process through centrifugal force and temperature gradients. The refrigerant automatically circulates through the lower portion, cooling the flue gas and causing carbon dioxide to precipitate as dry ice particles that are naturally separated by centrifugal action, reducing the need for complex control systems
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
The method effectively captures and converts carbon dioxide while purifying flue gas, producing ammonium bicarbonate fertilizer, with high safety, stability, and cost-effectiveness, and reduces emissions.
Implementation Method 1
the moisture in the industrial flue gas condenses into droplets
Implementation Method 2
forming a wall-seeking 'super-heavy centrifugal cryogenic pressure field' inside the cyclone separator, with a temperature below 10° C. and a pressure not less than 0.12 MPa
Implementation Method 3
creating a gas flow that rapidly rotates downward along the sidewall of the cyclone separator
Implementation Method 4
the carbon monoxide and carbon dioxide in the flue gas, along with the fresh air, to undergo a rapid reaction to produce carbonic acid
Data Source
AI summary
The application discloses a method and application for capturing and converting carbon dioxide in industrial flue gas, pertaining to the field of carbon dioxide capture technology. The method comprises the following steps: introducing the industrial flue gas into the upper part of a cyclone separator to create a gas flow that rotates downward along the cyclone wall, simultaneously introducing fresh air into the lower part of the cyclone separator to create an air flow that rotates downward along the cyclone wall, and cooling the cyclone separator to make the industrial flue gas and air react to produce a mixed acid containing carbonic acid under conditions of temperature below 10° C. and pressure not less than 0.12 MPa, thereby capturing and converting carbon dioxide in the industrial flue gas. The entire process of this method is simple and efficient. It exhibits high safety, practical value.