Micro-bubble Pump Impeller Design for Biogas Purification
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Solution Overview
Problem
Current biogas purification technologies are insufficient in achieving high-purity methane gas by inefficiently removing carbon dioxide and hydrogen sulfide, leading to corrosion and reduced efficiency when used as fuel.
Innovation Solution
A micro-bubble pump apparatus with a modified impeller structure that maximizes contact between biogas and water, enhancing the dissolution of carbon dioxide and hydrogen sulfide, and reduces noise through optimized impeller placement, utilizing a rotor with a single shape impeller connected to a hub with a continuous curved 'S' cross-section and support ribs for improved durability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional biogas purification technologies are used, then the purification process is simple, but the methane gas purity is insufficient and carbon dioxide and hydrogen sulfide cannot be effectively removed
Solution Approach 1:
The invention changes the physical state parameters of the system by introducing water in liquid form to contact biogas, transforming the purification mechanism from conventional adsorption or membrane separation to a dissolution-based process. The water acts as a solvent that selectively dissolves carbon dioxide and hydrogen sulfide from biogas, achieving high methane purity through parameter change (phase state and solubility) rather than complex equipment
Solution Approach 2:
Water serves as an intermediary substance that mediates between biogas and the purification objective. The water absorbs harmful gases (carbon dioxide and hydrogen sulfide) through dissolution, acting as a transfer medium that removes impurities without requiring direct contact between biogas components and complex separation equipment. This intermediary approach simplifies the overall process while achieving effective purification
2Productivity
If standard impeller structure is used, then the device structure is simple, but the mixing efficiency and water treatment performance are insufficient
Solution Approach 1:
The impeller blades are designed with curved surfaces instead of flat geometries. The curved blade surfaces create more effective fluid dynamics by generating rotational flow patterns that enhance gas-liquid contact. The curvature allows for better distribution of water flow and creates micro-bubble formation, significantly improving the dissolution of carbon dioxide and hydrogen sulfide while maintaining a relatively simple single-piece impeller structure
Solution Approach 2:
The impeller design incorporates three-dimensional curved surfaces rather than two-dimensional flat blades. This dimensional enhancement creates complex flow patterns in the mixing chamber, generating turbulence and micro-bubbles that increase the interfacial area between water and biogas. The 3D curvature adds a new dimension to the mixing mechanism, improving treatment efficiency without requiring multiple impeller components
3Object-affected harmful factors
If impeller is placed in conventional position, then the device structure is simple, but noise generation during mixing is excessive
Solution Approach 1:
The impeller is positioned asymmetrically within the mixing chamber rather than at the conventional center location. This asymmetric placement changes the flow dynamics and reduces direct impact forces that generate noise. The offset positioning creates a more gradual flow pattern that minimizes turbulent noise while maintaining effective mixing performance, achieving noise reduction through asymmetric geometric arrangement
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 apparatus significantly increases the purity of methane gas, maximizes water treatment efficiency, and minimizes noise during mixing, while offering a range of material options for the impeller and reducing production costs.
Implementation Method 1
a micro-bubble pump connected to the motor to mix a feed liquid fed from one side and a feed gas injected from the other side
Implementation Method 2
removing water-soluble gas such as carbon dioxide and hydrogen sulfide by mixing biogas with feed water
Data Source
AI summary
The present invention relates to a micro-bubble pump apparatus for a water treatment, and the micro-bubble pump apparatus for a water treatment comprises: a motor for generating rotatory power; and a micro-bubble pump connected to the motor and for mixing a feed liquid which flows into one side thereof and a feed gas which is injected into the other side thereof.