Supersonic Gas Injection for Liquid Dissolution
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Solution Overview
Problem
Existing methods for introducing gas into liquids, such as oxygenation in water bodies or industrial processes, are inefficient due to low oxygen content in air and the need for complex mechanical pumping systems, which increase installation and operational efforts, especially in remote or large water bodies.
Innovation Solution
A method and device that inject gas at ultrasonic speed below the liquid surface, adjusting pressure based on depth, using a Laval nozzle to generate a supersonic gas flow, creating an ultrasonic field for enhanced mixing and dissolution without requiring artificial pumping systems, and allowing for pulsed gas injection to expand the dissolution area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If gas is introduced into liquid at subsonic speed through conventional injectors, then the gas scatters widely and penetration depth is limited, but the liquid surface reflections and scattering reduce dissolution efficiency
Solution Approach 1:
The patent changes the speed parameter of gas injection from subsonic to supersonic (Mach number > 1). This parameter change transforms the gas flow characteristics, reducing scattering and surface reflections, thereby improving penetration depth and dissolution efficiency without requiring complex mechanical systems
2Productivity
If Venturi systems are used to mix gas and liquid intensively, then dissolution efficiency is improved, but artificial pumping systems are required which increase installation and operational effort
Solution Approach 1:
The supersonic gas jet itself generates the mixing action through its kinetic energy and shock wave formation in the liquid. The gas flow creates turbulence and intense mixing zones automatically, eliminating the need for external pumping systems to generate liquid flow for mixing purposes
Solution Approach 2:
The patent replaces mechanical pumping systems with a gas dynamic system. Instead of using mechanical pumps to create liquid flow for mixing, the system uses supersonic gas injection to create the necessary flow and mixing conditions through gas kinetic energy and shock wave-induced turbulence
3Stress or pressure
If gas is injected at high pressure to achieve deep penetration, then dissolution efficiency improves, but pressure control becomes more critical and complex
Solution Approach 1:
The patent employs pulsed gas injection instead of continuous high-pressure injection. The periodic pulsing maintains effective dissolution through repeated shock wave formation and turbulence generation, while allowing simpler pressure control compared to sustained high-pressure systems
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
This approach achieves deep penetration and rapid distribution of gas in the liquid, improving solubility and eliminating the need for mechanical pumping, resulting in efficient and cost-effective gas introduction into liquids, suitable for various applications including wastewater treatment and industrial processes.
Implementation Method 1
using a Laval nozzle to generate a supersonic gas flow
Implementation Method 2
An advantageous development of the invention provides that an ultrasonic field is generated by the entry of the gas in the liquid
Implementation Method 3
the gas flow in the liquid generates a strong flow that covers a wide area around the inlet device
Data Source
Figure 1~2
AI summary
In known systems used, for example, in wastewater treatment or the aeration of water bodies, gas, particularly oxygen, is introduced into a liquid either at low pressure using perforated hoses or at high pressure with the aid of Venturi nozzles. Perforated hoses are inefficient, while Venturi systems are very complex. According to the invention, the water is introduced into the liquid below the liquid level (16) using ultrasound, preferably by generating an ultrasonic field within the liquid itself. The gas is preferably introduced using a Laval nozzle (3). With a simple apparatus design, the invention achieves very good gas dissolution in the liquid.