Loop Flow Bubble Nozzle Preventing Impurity Blockage
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Solution Overview
Problem
Conventional loop flow type bubble generation nozzles experience reduced efficiency when used with liquids containing impurities like calcium and microorganisms, as deposits form due to cavitation, obstructing gas feed and reducing bubble generation efficiency.
Innovation Solution
The nozzle features a loop flow type gas-liquid stirring and mixing chamber with a tapered section, cut-away parts, and a recessed gas reservoir section, which generates high-speed loop flows and prevents deposition of impurities by creating sufficient space for splash liquid and fine bubbles to be dried or aggregated, maintaining gas flow stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a loop flow type gas-liquid stirring and mixing chamber is used to generate bubbles, then fine bubbles including nanobubbles can be generated efficiently, but deposits formed from impurities may adhere between the gas-liquid stirring chamber and gas feed chamber, obstructing gas feed and reducing bubble generation efficiency
Solution Approach 1:
The gas feed chamber is divided into multiple circumferential regions separated by partition walls, creating independent gas feed paths. This segmentation prevents deposits from completely blocking gas feed - if one path is obstructed, other paths remain open, maintaining reliable gas supply while preserving bubble generation efficiency
Solution Approach 2:
A liquid discharge hole is introduced as an intermediary element between the gas-liquid stirring chamber and gas feed chamber. This hole allows liquid to be discharged from the stirring chamber, preventing liquid accumulation and reducing the formation of deposits that would otherwise obstruct gas feed paths
2Ease of manufacture
If the nozzle structure is simplified, then manufacturing cost is reduced, but bubble generation efficiency improvement is limited
Solution Approach 1:
The gas feed chamber serves multiple functions: it feeds gas to the stirring chamber, prevents deposit accumulation through its circumferential structure, and maintains pressure stability. This multi-functionality achieves improved bubble generation efficiency without requiring separate additional components, maintaining manufacturing simplicity
Solution Approach 2:
The tapered section with curved surface and the circumferential gas feed structure create smooth flow paths that enhance mixing efficiency and prevent deposit accumulation through streamlined geometry, improving bubble generation without complex mechanical components
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 configuration enables stable high-speed loop flow and efficient generation of fine bubbles, including nanobubbles, without reducing efficiency even when using impure liquids, by preventing blockages and ensuring continuous gas feed.
Implementation Method 1
a loop flow type gas-liquid stirring and mixing chamber which stirs and mixes liquid and gas by a loop-like flow to form a fluid mixture
Implementation Method 2
sludge (a solid body) or/and scale (so-called fur) formed from impurities such as calcium and dead microorganisms may be deposited and adhered between the loop flow type gas-liquid stirring and mixing chamber and the gas feed chamber of the nozzle by a splash phenomenon (a phenomenon of liquid splashing) caused by cavitation (a physical phenomenon in which generation and disappearance of bubbles occur in a short time due to a difference in pressure in the flow of liquid)
Data Source
Figure 1(a)~1(d)
Figure 2
Figure 3(a)~3(c)
AI summary
There is provided a loop flow type bubble generation nozzle capable of improving the bubble generation efficiency compared to conventional nozzles without reducing the bubble generation efficiency even when liquid containing impurities is used. A loop flow type bubble generation nozzle 10 includes a tubular bottomed member 1 having a circular cross section and a tubular member 2 which is fitted into the other end side of the bottomed member 1. A substantially cylindrical space surrounded by the bottomed member 1 and the tubular member 2 serves as a loop flow type gas-liquid stirring and mixing chamber 6. The tubular member 2 has, on the center thereof, an inflow hole 7 which is capable of allowing liquid and gas to flow therein, and a first jet hole 8a and a second jet hole 8b which are capable of jetting liquid and gas. The inflow hole 7 is formed in a tapered shape whose diameter continuously expands from the first jet hole 8a toward the loop flow type gas-liquid stirring and mixing chamber 6. A plurality of cut-away parts 7a are formed on an end face of the inflow hole 7, the end face facing the loop flow type gas-liquid stirring and mixing chamber 6.