Venturi Tube Ring-Shaped Passage for Gas Dissolution
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Solution Overview
Problem
Traditional Venturi tubes have a low gas dissolution rate due to larger gas bubble sizes and pressure gradients, which reduce contact between gas and liquid, and are limited by their size and cost for manufacturing.
Innovation Solution
A Venturi tube with a cylindrical structure incorporating a first and second cone, forming a ring-shaped fluid passageway with a larger cross-sectional area, allowing for higher flow rates and smaller bubble sizes, enhancing gas dissolution by aligning bubbles with the fluid axis for increased contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional Venturi tube with a narrow throat is used, then the device structure is simple, but the gas bubble volume is large resulting in low gas dissolution rate
Solution Approach 1:
The internal structure of the Venturi tube is segmented into multiple functional zones: a convergent section with increasing cross-sectional area, a throat section with maximum expansion, and a divergent section. Additionally, multiple gas injection ports are distributed along the throat section, segmenting the gas introduction process to create numerous small bubbles instead of a single large bubble, thereby significantly increasing the gas dissolution rate.
Solution Approach 2:
The patent transitions from a traditional single-dimensional narrow throat design to a multi-dimensional ring-shaped passage structure. The ring-shaped passage provides both radial and axial dimensions for fluid flow, increasing the effective cross-sectional area available for gas-liquid contact while maintaining a compact overall device size, thus resolving the contradiction between dissolution rate and device complexity.
2Productivity
If the throat cross-sectional area is increased to reduce bubble size, then gas dissolution rate improves, but the device length increases
Solution Approach 1:
The ring-shaped passage structure utilizes radial expansion to increase cross-sectional area without proportionally increasing axial length. By creating an annular flow path around a central region, the design achieves large effective flow area in a compact axial footprint, allowing high gas dissolution rates while maintaining a short device length.
Solution Approach 2:
The inner cone structure is nested within the outer cylindrical housing, creating a ring-shaped passage between them. This nested configuration allows the fluid to flow through an annular region, effectively utilizing the radial space to increase cross-sectional area without extending the axial length of the device, thus resolving the length-dissolution rate contradiction.
3Productivity
If a larger cross-sectional area is used in the throat, then smaller bubble sizes are achieved, but manufacturing cost increases
Solution Approach 1:
The complex ring-shaped passage structure is segmented into modular components: an outer cylindrical housing and an inner cone assembly that can be manufactured separately and then assembled. This segmentation allows each component to be manufactured using standard machining processes, avoiding the need for expensive complex single-piece manufacturing while achieving the desired large cross-sectional area for high gas dissolution rates.
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 redesigned Venturi tube achieves a higher gas dissolution rate and reduced size, addressing the limitations of traditional designs by creating smaller bubbles that dissolve more effectively within the fluid.
Implementation Method 1
A traditional Venturi tube 100, as shown in Fig. 1, has a convergent inlet (inlet conical tube) 112, a narrow throat 116, and a divergent outlet (outlet conical tube) 114 and works in accordance with Bernoulli's principle, which states that for a horizontal flow of fluid, points of higher fluid speed will have less pressure than points of slower fluid speed.
Implementation Method 2
Due to the gradient of the pressure in the Venturi tube, upon leaving the throat 116, the gas bubbles will be pushed away from axis Z (the axial direction of the fluid stream), and toward the inner surface of the divergent outlet 114.
Data Source
Figure 1
Figure 2
AI summary
The invention is directed to a Venturi tube 1 comprising: a cylindrical tube 10, wherein a first cone 20 and a second cone 30 are arranged. The first cone and the second cone are configured so that their bases face each other and are separated by a gap. A suction tube 40 has an inlet 42 and an outlet 44. The inlet is located outside of the cylindrical tube and the outlet is located between the first base and second base, i.e., the gap between the first base and the second base. The Venturi tube of this structure serving as a gas-liquid mixer will have higher gas solubility. The Venturi tube of this structure has a shorter length than traditional ones while processing the same amount of liquid and thus requires lower manufacturing cost.