Fine Bubble Generator with Dual-Stage Flow Path and Impeller Collision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fine bubble generators often produce insufficient volumes of fine bubbles due to limitations in their design, particularly in the pressure reduction and expansion mechanisms within the flow paths.
Innovation Solution
The fine bubble generator incorporates a dual-stage flow path configuration with a diameter-reducing and increasing flow path, combined with a guide flow path and collision flow path, featuring an impeller and vanes to enhance bubble refinement, and an axial extension portion to increase collision frequency, thereby increasing the volume of fine bubbles generated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single-stage diameter-reducing and diameter-increasing flow path is used, then the structure is simple, but the volume of fine bubbles generated is insufficient
Solution Approach 1:
The flow path is divided into multiple stages: a first fine bubble generation portion with diameter-reducing and diameter-increasing flow paths, and a second fine bubble generation portion with guide flow path and collision flow path. This segmentation allows each stage to perform specific functions, progressively generating and refining bubbles to achieve larger fine bubble volume without excessive complexity
Solution Approach 2:
The patent introduces a radial dimension by adding an impeller with blades that rotate in the radial direction, creating collision flow paths between the impeller blades and the housing wall. This adds a rotational motion dimension to the axial flow, enhancing bubble generation and refinement through centrifugal forces and collisions
2Quantity of substance
If the flow path diameter is reduced to increase flow speed and generate bubbles, then bubble generation is enhanced, but the pressure increases after expansion which may reduce fine bubble volume
Solution Approach 1:
The pressure control is segmented into stages: the first fine bubble generation portion handles pressure reduction and initial bubble formation, while the second fine bubble generation portion with its guide flow path and collision flow path handles pressure management during bubble refinement. This staged approach maintains optimal pressure conditions for fine bubble generation throughout the process
Solution Approach 2:
The impeller acts as an intermediary mechanism between the pressure reduction stage and the final fine bubble generation stage. It uses rotational kinetic energy to create collision flows that refine bubbles without requiring excessive pressure increases, thereby maintaining fine bubble volume
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 effectively increases the volume of fine bubbles by enhancing pressure reduction, expansion, and collision mechanisms, leading to a larger volume of refined bubbles.
Implementation Method 1
A flow speed of the gas-dissolved water increases as it flows through the diameter-reducing flow path, as a result of which its pressure is reduced. Bubbles are generated as a result of this pressure reduction of the gas-dissolved water.
Implementation Method 2
Then, the pressure of the gas-dissolved water is gradually increased as the gas-dissolved water flows through the diameter-increasing flow path. When the pressure of the gas-dissolved water is increased after the bubbles were generated by the pressure reduction, the bubbles included in the gas-dissolved water break up into fine bubbles.
Implementation Method 3
the gas-dissolved water that flowed into the second fine bubble generation portion flows through the guide flow path and into the collision flow path, and collides with the disc of the first impeller disposed on the collision flow path. Since the gas-dissolved water that flowed into the second fine bubble generation portion is guided, by the guide flow path, in the center direction toward the flow path axis of the second flow path, that is, along the center direction of the disc, majority of the gas-dissolved water collides with the disc in vicinity of a central area thereof.
Implementation Method 4
the gas-dissolved water having collided with the disc flows along the first vane(s), by which the disc rotates relative to the first bearing. As the disc rotates relative to the first bearing, the gas-dissolved water flowing along the first vane(s) is guided off of the disc radially outward, and collides with the collision flow path wall defining the collision flow path.
Implementation Method 5
When the gas-dissolved water collides with the collision flow path wall, the fine bubbles generated in the first fine bubble generation portion further break up into even finer bubbles, and a volume of the fine bubbles thereby increases.
Data Source
AI summary
A fine bubble generator may include an inlet, an outlet, a first fine bubble generation portion including a first flow path, and a second fine bubble generation portion including a second flow path. The first flow path may include a diameter-reducing flow path and a diameter-increasing flow path. The second flow path may include a guide flow path and a collision flow path disposed downstream of the guide flow path. A first bearing and a first impeller rotatably attached to the first bearing may be disposed on the collision flow path. The first impeller may include a disc disposed at a position at which the gas-dissolved water collides with the disc; a first rotation shaft disposed on a downstream surface of the disc and rotatably attached to the first bearing; and one or more first vanes disposed on an upstream surface of the disc.