Biogas Membrane Permeation Control by Gross Calorific Value
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Solution Overview
Problem
Existing biogas purification methods struggle to achieve precise methane concentration in biomethane production, leading to inefficiencies and increased costs due to varying gas compositions and high carbon dioxide content.
Innovation Solution
An arrangement and process for membrane permeation treatment that includes measuring the gross calorific value of the feed gas stream, comparing it to a setpoint, and adjusting membrane regulation parameters to achieve desired methane and carbon dioxide concentrations using control signals and valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional biogas purification methods are used, then carbon dioxide separation is achieved, but precise control over methane concentration is difficult to achieve
Solution Approach 1:
The patent implements a feedback control system where the gross calorific value of the biomethane stream is continuously measured and compared against a target value. Based on this comparison, control signals are automatically generated to adjust membrane valve positions, thereby maintaining precise methane concentration control through closed-loop feedback
Solution Approach 2:
The patent replaces complex mechanical purification systems with a control-based approach using gross calorific value measurement and electronic control signals to adjust membrane valves, substituting direct mechanical intervention with a more sophisticated control system that achieves better precision
2Quantity of substance
If membrane permeation treatment is used for carbon dioxide separation, then gas purification is achieved, but losses of methane occur
Solution Approach 1:
The feedback control system monitors the gross calorific value of the biomethane stream and adjusts membrane valve positions in real-time to optimize the balance between carbon dioxide removal efficiency and methane retention, preventing excessive methane losses while maintaining purification productivity
Solution Approach 2:
The patent dynamically changes operational parameters (membrane valve positions, pressure differentials) based on measured gross calorific value deviations, allowing the system to adapt to varying feed gas compositions and optimize the trade-off between methane retention and purification efficiency
3Adaptability or versatility
If varying gas compositions are processed, then flexibility is improved, but control precision deteriorates
Solution Approach 1:
The continuous measurement and feedback control of gross calorific value enables the system to automatically compensate for variations in feed gas composition, maintaining precise methane concentration control regardless of changes in biogas input characteristics
Solution Approach 2:
The patent implements dynamic control where membrane valve positions are continuously adjusted based on real-time gross calorific value measurements, allowing the system to adapt to varying gas compositions while maintaining consistent output quality through continuous parameter optimization
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 solution provides precise control over methane concentration, minimizing losses and reducing operational costs by accounting for all gas constituents, ensuring high purity biomethane production.
Implementation Method 1
a first membrane separation unit capable of receiving the feed gas stream and of providing a first permeate and a first retentate
Data Source
AI summary
Arrangement for regulation of a plant I for the membrane permeation treatment of a feed gas stream, comprising at least methane and carbon dioxide, that includes at least one means A for measurement of the gross calorific value (GCV) of the feed gas stream, at least one means B for comparison of the gross calorific value with a setpoint value E, at least one means C for production of a control signal as a function of the comparison of the gross calorific value with the setpoint value E, and at least one means D for transmission of this control signal to a means for regulation of said plant I.