Venturi Microbubble Generator for Low Pressure Drop Aeration
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Solution Overview
Problem
Existing devices for generating micro and nano bubbles in liquids require external energy sources, suffer from pressure drops, back pressure issues, and are inefficient in handling flow rate variations or partial closures, leading to operational problems.
Innovation Solution
A device that generates micro and nano bubbles using a Venturi chamber with a conical spacer system, allowing for efficient bubble generation without external energy, and maintaining bubble production even with partial closures or flow rate variations, using a modular design with conical spacers and a wedge-shaped profile to manage back pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If external energy sources (thermal and electrical) are used to generate air bubbles, then bubble generation efficiency is improved, but device complexity and cost increase
Solution Approach 1:
The device uses the kinetic energy of the flowing liquid itself to generate the bubbles, without requiring external thermal or electrical energy sources. The liquid flow creates a Venturi effect that draws air in and forms bubbles, making the system self-powered and simpler in design.
Solution Approach 2:
The invention employs hydraulic principles by using the flowing liquid to create a Venturi effect in a specially designed chamber. This hydraulic approach uses fluid dynamics (pressure differential created by constricted flow) to entrain and mix air with the liquid, eliminating the need for complex mechanical or electrical bubble generation systems.
2Productivity
If high pressure drops are applied to generate micro and nano bubbles, then bubble generation is improved, but operational reliability decreases due to back pressure issues
Solution Approach 1:
The device dynamically adapts to varying flow conditions by using the natural kinetic energy of the liquid flow itself. The Venturi chamber design allows the system to automatically adjust to flow rate variations and partial closures without requiring high constant pressure drops, maintaining reliable operation across different operating conditions.
Solution Approach 2:
The invention changes the operating parameters by using atmospheric pressure air intake combined with hydraulic pressure differential rather than high pressure drops. The conical spacers and Venturi geometry create localized pressure differentials that are sufficient for bubble generation without subjecting the entire system to high back pressure.
3Device complexity
If simple Venturi systems are used for bubble generation, then device complexity is reduced, but the system fails to provide good suction and generate adequate nano and micro bubbles under partial closures
Solution Approach 1:
The Venturi chamber is segmented into multiple functional zones with conical spacers arranged in sequence. This segmentation creates multiple stages of air entrainment and bubble formation, enhancing the suction capability and bubble generation efficiency while maintaining a relatively simple overall structure.
Solution Approach 2:
The device combines different geometric elements (conical spacers, Venturi chamber, diffuser section) into a composite hydraulic structure. This composite design integrates multiple functions (air intake, mixing, bubble formation) into a single streamlined device that maintains simplicity while significantly improving bubble generation capability under various flow conditions.
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 effectively generates calibrated micro and nano bubbles with reduced pressure drops and back pressure issues, ensuring consistent operation across varying flow rates and partial closures, while being economical and easy to install, and reduces the need for chemical products.
Implementation Method 1
A device which generates micro and nano bubbles exploiting the Venturi effect
Data Source
Figure 1~2
Figure 3~4
Figure 3a
AI summary
The present invention relates to a device (1) for the generation of micro and nano bubbles of gas in a liquid comprising: an outer tubular body (10) with an extension along a longitudinal axis a-a; an inlet (20) for a flow of liquid; an outlet (30) of the flow of liquid in fluid communication with said inlet (20); a central body (40) contained in a central area of said outer tubular body (10). The central body (40) comprises - a pre-chamber (41) containing a gas; - an air intake (42) in connection with said pre-chamber (41) and with an external source of gas; - a converging element (52), configured to concentrate the flow of liquid at the inlet; - a Venturi chamber (44) in fluid contact with said pre-chamber (41), configured to suck the gas from the pre-chamber (41) and generate micro and nano bubbles of gas in the liquid that passes through it.