Nanobubble Generating Nozzle and System

Goal

Generate nanobubbles efficiently in a compact device.

Problem

Need for a compact, high-efficiency nanobubble generator for water treatment and related applications.

Concept Summary

A nozzle that introduces a liquid-gas mixture, passes it through a series of flow paths with varying cross-sectional areas, and uses a nanobubble-generating structure (e.g., porous membrane, helical splitter, or moving rushing piece) to create nanobubbles. Variants include membrane-based generators, bamboo-filter tubes, and collision-plate designs, often combined with feedback circuits for size control.

Principles

• Fluid shear and turbulence
• Pressure differential across porous media
• Hydrophobic surface nucleation
• Vortex and jetting dynamics
• Feedback-controlled valve actuation

Scientific Domains

Materials

• Ceramic membrane
• Hydrophobic porous coating (polymer)
• Porous inner tube (bamboo-like material)
• Metal or plastic collision plates
• PVC or stainless-steel tubing

Mechanisms of Action

• Shear-induced bubble formation in narrow flow paths
• Gas permeation through hydrophobic pores to nucleate bubbles
• Vortex-driven cavitation in helical splitters
• Collision of liquid jets with plates to create pressure spikes

Energy Sources

Applications

• Wastewater treatment
• Coating cloud handling
• Bath and sink cleaning
• Sterilization of water
• Industrial process water treatment

Claimed Performance

Compact design with high nanobubble generation efficiency, low noise, low safety hazard, and ability to control bubble size via feedback circuit.

Limitations

• Requires continuous gas supply
• Performance depends on precise pressure control
• Scaling to very high flow rates may be challenging

Keywords

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