Gas-liquid mixing device with segmented collision chambers
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Solution Overview
Problem
Existing gas-liquid mixing devices face inefficiencies in generating microbubbles due to suboptimal collision rates and variations in gas intake, leading to incomplete fragmentation and inconsistent bubble sizes, as well as issues with screw-based gas intake systems being prone to loosening and accuracy-dependent air intake variations.
Innovation Solution
A gas-liquid mixing device with a venturi structure incorporating a ring-shaped collision chamber and a stirring chamber, featuring multiple collision and outer ring flow paths arranged at equal angular intervals, and a screw connection with a notch for stable gas intake, along with a wire mesh filter to fragment bubbles into uniform microbubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross section of the main passage where the downstream second collision portion is provided is smaller than the cross section of the main passage where the upstream first collision portion is provided, then the gas-liquid flow rate is decreased, but the collision efficiency becomes insufficient and uniform microbubbles cannot be formed
Solution Approach 1:
The collision chamber is divided into multiple flow paths (first collision flow path, second collision flow path, third collision flow path) with different cross-sectional areas. This segmentation allows each flow path to handle gas-liquid at optimal flow rates, ensuring both high productivity and uniform bubble fragmentation across all paths.
Solution Approach 2:
Different flow paths are designed with different cross-sectional areas to match the local gas-liquid flow characteristics. The first collision flow path has a larger cross section for high flow rate handling, while the second and third collision flow paths have smaller cross sections for precise collision control, optimizing both flow rate and collision efficiency in different regions.
2Adaptability or versatility
If a screw connection is used for gas intake adjustment, then the gas intake can be adjusted, but the screw may loosen due to vibration and the air intake amount varies depending on processing accuracy
Solution Approach 1:
A lock nut is provided in advance on the gas intake adjustment screw to prevent loosening due to vibration. The lock nut is positioned to engage with the screw threads, creating a preliminary locking mechanism that maintains the adjusted gas intake position without requiring additional operations during operation.
Solution Approach 2:
The lock nut acts as an intermediary element between the gas intake adjustment screw and the housing. It mediates the connection by providing friction-based locking through its engagement with the screw threads, eliminating the need for direct screw-to-housing engagement and the associated loosening problems.
3Device complexity
If the cross-sectional area of the flow passage is reduced to create negative pressure for gas intake, then gas can be taken in without an intake hole, but the path length increases and intake air amount varies with processing accuracy
Solution Approach 1:
The gas intake system is segmented into multiple pathways: the negative pressure pathway through the reduced cross-sectional area flow passage, and the screw-thread clearance pathway. This segmentation allows the system to combine the simplicity of negative pressure intake with the consistency of controlled clearance pathways, reducing variation due to processing accuracy.
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 device efficiently generates microbubbles through optimized collision and stirring mechanisms, stabilizes gas intake, and ensures consistent bubble size by reducing resistance and enhancing collision efficiency, thereby improving bubble fragmentation and stability.
Implementation Method 1
there is a method using a venturi structure in which the cross-sectional area of a passage through which a liquid flows is reduced to reduce pressure
Implementation Method 2
an enlarged diameter portion with an increased cross-sectional area is provided downstream, so that shear stress due to the pressure change is generated in a gas-liquid mixed with the gas to fragment the gas
Implementation Method 3
an upstream first collision portion and a downstream second collision portion are provided with respect to a traveling direction of the gas-liquid, and the gas-liquid is caused to collide with the collision portions to crush and fragment large bubbles
Implementation Method 4
a gap between screw connection surfaces of a water supply pipe and a housing of a gas-liquid mixing device is communicated with a space provided inside the gas-liquid mixing device at a negative pressure area created by reducing the cross-sectional area of a flow passage, to take in the external gas
Data Source
AI summary
The device is a gas-liquid mixing device having a venturi structure in which a throat portion and an enlarged diameter portion are provided in a main passage through which a liquid passes, the gas-liquid mixing device including a collision chamber provided on an outer periphery of the enlarged diameter portion, and a stirring chamber provided downstream of the enlarged diameter portion. A collision flow path communicating with the collision chamber and causing a gas-liquid to collide with an outer peripheral wall, a straight flow path through which the gas-liquid passing through a central portion of the enlarged diameter portion travels straight, and an outer ring flow path through which the gas-liquid flows from the collision chamber to the stirring chamber are formed downstream of the enlarged diameter portion. The gas-liquids from the outer ring flow path and the straight flow path are stirred in the stirring chamber.