Gas-Bubble Tank Separation for Multi-Density Solids Classification
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Solution Overview
Problem
Existing separation techniques for process streams containing solids particles, such as those from wastewater treatment, lack the ability to effectively control and classify solids based on discreet density differences, limiting the flexibility and efficiency of recycle streams.
Innovation Solution
A method involving a tank zone with controlled gas introduction to generate gas bubbles that attach to solids particles, promoting upward or downward flow based on density, allowing for the separation of solids into three distinct streams: high, medium, and low density, with adjustable flow control to manage the composition of each stream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gravity-based separation is used to separate solids from liquid, then separation is achieved, but density classification control is not possible and only two density classes can be obtained
Solution Approach 1:
The patent introduces gas bubbles into the liquid stream to attach to solids particles, using pneumatic principles to modify particle density and enable controlled separation into multiple density classes. The gas flow rate and bubble size are controlled to achieve precise density classification.
Solution Approach 2:
The patent changes the physical parameters of the separation process by introducing gas bubbles with controlled flow rates, temperatures, and pressures to modify the apparent density of solids particles, enabling continuous density classification rather than fixed two-class separation.
2Adaptability or versatility
If cyclonic action is used to increase apparent density, then denser particles are classified, but only two density classes (high and low) are achieved with limited control
Solution Approach 1:
The patent segments the single cyclonic separation process into multiple zones with different gas injection rates and bubble sizes, creating three or more distinct density classes instead of just high and low density separation.
Solution Approach 2:
The patent makes the separation process dynamic by continuously adjusting gas flow rates and bubble characteristics in different zones, allowing real-time control over the number and composition of density classes produced.
3Manufacturing precision
If intrinsic density separation is used, then solids are separated from liquid, but discreet density differences cannot be selected and recycle stream control is difficult
Solution Approach 1:
The patent incorporates feedback control mechanisms where the composition and flow rate of recycle streams are monitored and adjusted by controlling gas injection parameters, enabling precise control over the density and composition of separated streams.
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
Enables precise control over the recycling and disposal of solids particles by separating them into multiple density classes, enhancing process flexibility and efficiency in wastewater treatment and biopharmaceutical production.
Implementation Method 1
the gas bubbles attach to a first portion of the solids particles thus promoting upward flow of the first portion of the solids particles within the tank zone. Generally, this upward flow is caused by the bubbles decreasing the density of the solids particles to which they are attached.
Implementation Method 2
a gas-containing stream is introduced into the tank zone so as to generate gas bubbles in the process liquid stream
Implementation Method 3
The less dense and smaller particles will tend to flow upwards due to the bubbles, while the more dense particles and larger particles will tend to flow downwards.
Data Source
AI summary
The methods and systems provide for the improvement in the separation of different portions of solids particles, such as bacteria, from a process stream. The methods use gas and control of fluid flow within a tank zone to provide for separation that is more selective.