High-Pressure CO2 Adsorption-Desorption Columns for Greenhouse Airflow
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Solution Overview
Problem
Existing carbon dioxide capture devices in greenhouses face inefficiencies due to inadequate control over air flow rate, leading to incomplete adsorption or desorption, which affects the overall adsorption effect and plant growth promotion.
Innovation Solution
A high-pressure air carbon adsorption and desorption integrated device with a first and second adsorption column, variable pressure blades, and a control module to dynamically adjust air flow and humidity, enhancing contact time and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air flow rate passed into the adsorption column is increased to reduce trapping time, then the productivity is improved, but the adsorption completeness deteriorates because the air fails to fully react with the solid adsorbent
Solution Approach 1:
The adsorption column is divided into multiple adsorption layers with different adsorbent materials arranged in sequence. Each layer performs a specific adsorption function, allowing the system to maintain high adsorption completeness while processing air at higher flow rates through the segmented structure.
Solution Approach 2:
The patent implements dynamic control of the air flow rate through the adsorption column, adjusting the flow speed according to operational conditions to optimize both adsorption completeness and productivity. The system can vary flow rates between 0.5-2.0 m/s depending on the adsorption stage and requirements.
2Reliability
If the air flow rate is decreased to ensure complete reaction with adsorbent, then the adsorption completeness is improved, but the productivity deteriorates due to excessively long trapping time
Solution Approach 1:
By segmenting the adsorption process into multiple layers with different adsorbents, each layer can operate at optimized flow rates for its specific function, maintaining overall adsorption completeness while reducing total trapping time through parallel processing capability.
Solution Approach 2:
The patent changes physical parameters such as air flow rate, pressure, and temperature across different adsorption layers to optimize adsorption efficiency. Flow rates are dynamically adjusted between 0.5-2.0 m/s, and pressure variations are used to enhance mass transfer and adsorption kinetics.
3Productivity
If high-pressure air is continuously passed into the adsorption column to improve productivity, then the productivity is improved, but the energy consumption increases due to continuous high-pressure operation
Solution Approach 1:
The patent implements periodic cycling between adsorption and desorption phases, allowing the system to recover and reuse adsorbent materials. This periodic operation reduces continuous energy input requirements while maintaining high productivity through alternating operational modes.
Solution Approach 2:
Pressure parameters are dynamically adjusted during operation, using high pressure only when necessary for adsorption while utilizing lower pressure during desorption and regeneration phases, thereby reducing overall energy consumption while maintaining productivity.
4Use of energy by moving object
If the same air is used repeatedly for adsorption to improve energy efficiency, then the energy consumption is reduced, but the adsorption effect deteriorates due to accumulated carbon dioxide in the air
Solution Approach 1:
Different sections of the adsorption system use different air streams with appropriate carbon dioxide concentrations. The system introduces fresh air at specific locations where high adsorption capacity is needed, while recycling air in sections where the adsorbent still has available capacity, thereby maintaining adsorption effectiveness while improving energy efficiency.
Solution Approach 2:
The air flow path is segmented into different zones with varying carbon dioxide concentrations. Fresh air is introduced at the inlet where adsorbent capacity is highest, while air that has already passed through initial adsorption layers is directed to subsequent layers or recycled after desorption, optimizing both energy efficiency and adsorption effect.
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 carbon dioxide capture and desorption efficiency per unit time, promoting plant growth and reducing energy waste, while maintaining optimal conditions for carbon dioxide release into the greenhouse.
Implementation Method 1
utilize the adsorbent to react with the air to capture the carbon dioxide in the air
Implementation Method 2
a heater being arranged between the two adsorbent placement plates
Data Source
AI summary
A high-pressure air carbon adsorption and desorption integrated device applied to an intelligent greenhouse is provided, including a first air compressor, a first adsorption column, a second adsorption column, and a vortex blower exhaust pump connected sequentially. A second air compressor is connected to bottoms of the first adsorption column and the second adsorption column. A plurality of groups of adsorption assemblies are arranged at intervals within each of the first adsorption column and the second adsorption column, each group of the plurality groups of adsorption assemblies includes two adsorbent placement plates, a heater is arranged between the two adsorbent placement plates, each group of the plurality groups of adsorption assemblies is provided with a plurality of through-holes, and each of the plurality of through-holes is arranged with an openable and closeable variable pressure blade.