Containerized Biogas Purification via Membrane Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional biogas purification methods, such as pressure swing adsorption and pressure water washing, face issues of large space occupation, high investment, high energy consumption, and high operating costs, along with complex processes and pollutant discharge.
Innovation Solution
A container-type biogas purification system utilizing a desulfurization and dehydration unit, oil-free compressor, heat exchanger, and film-group purification unit, where the biogas is sequentially processed through filters and polymer films to separate carbon dioxide from methane, minimizing space and energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pressure swing adsorption method is used for biogas purification, then purification effect is achieved, but space occupation increases and device complexity increases
Solution Approach 1:
The patent integrates multiple purification functions (desulfurization, dehydration, filtration, and CO2 removal) into a single compact containerized system. The membrane separation unit combines CO2 removal with the desulfurization and dehydration units, eliminating the need for separate large-scale adsorption towers while achieving comprehensive purification effects.
Solution Approach 2:
The patent employs membrane separation technology using thin film membranes to remove CO2 from biogas. This membrane-based approach replaces traditional bulky adsorption towers with compact membrane modules, significantly reducing space occupation while maintaining effective CO2 removal to achieve purification effects meeting natural gas vehicle fuel standards.
2Manufacturing precision
If pressure water washing method is used for biogas purification, then CO2 removal is achieved, but energy consumption increases and operating cost increases
Solution Approach 1:
The patent replaces the mechanical pressure water washing system with a membrane separation system. Instead of using high-pressure water circulation and temperature control mechanisms, the membrane system uses selective permeation properties of the membrane material to separate CO2 from biogas, dramatically reducing energy consumption while achieving effective CO2 removal.
Solution Approach 2:
The patent changes the separation mechanism from pressure-driven water absorption to membrane-based selective permeation. By utilizing the different permeability rates of CO2 and CH4 through the membrane, the system achieves CO2 removal without requiring high pressure and temperature control, thereby reducing operating costs and energy consumption.
3Manufacturing precision
If traditional purification methods are used, then purification is achieved, but system mobility decreases and adaptability decreases
Solution Approach 1:
The patent combines all purification units (desulfurization, dehydration, filtration, and membrane separation) into a single integrated containerized system. This modular design maintains high purification quality while enabling the entire system to be mobile and adaptable to different installation locations, unlike traditional fixed purification plants.
Solution Approach 2:
The containerized purification system is designed with universal applicability, capable of being deployed at various biogas sources (farmers' fields, sewage treatment plants, etc.). The system maintains consistent purification performance across different applications while providing mobility and adaptability through its standardized container design and modular configuration.
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 system achieves efficient biogas purification with low investment and energy consumption, ensuring high-quality output with minimal pollutant generation, meeting national standards for vehicle fuel, and offering flexibility and ease of mobility.
Implementation Method 1
gases with greater solubility coefficient and diffusion coefficient (such as CO2, H2S) preferentially permeate through the tube wall
Implementation Method 2
gases with greater solubility coefficient and diffusion coefficient (such as CO2, H2S) preferentially permeate through the tube wall
Implementation Method 3
a heat exchanger, and a film-group purification and gas preparation unit
Implementation Method 4
a compressor, a purification unit, a heat exchanger
Data Source
AI summary
A container-type biogas purification film method purification system comprises: a desulfurization and dehydration unit, a compressor, a purification unit, a heat exchanger, and a film-group purification and gas preparation unit that are disposed inside a movable container and are sequentially connected, the desulfurization and dehydration unit is connected to a biogas source generated by an anaerobic fermentation.