Rotating Fluid Processing Apparatus with Micropump Inlet
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Solution Overview
Problem
Existing fluid processing apparatuses face challenges with clogging, inefficient mixing, and uniformity issues due to high reaction speeds and microscopic scales, leading to suboptimal processing and product formation in microreactors and micromixers, particularly when dealing with high viscosity fluids and complex chemical reactions.
Innovation Solution
A fluid processing apparatus where a first fluid is introduced between rotating processing surfaces using a micropump effect, and a second fluid is introduced from a separate flow path with controlled directionality and angle, combined with strategically arranged depressions on the processing surfaces to manage flow and prevent clogging, allowing for stable and uniform processing by generating a spiral laminar flow and potentially a perpendicular flow to enhance mixing and temperature homogenization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microchannels with small diameter are used to achieve microscopic reaction field, then mixing efficiency and reaction speed are improved, but pressure loss increases significantly and flow path clogging occurs
Solution Approach 1:
The reaction system is divided into multiple parallel microchannels instead of using a single microchannel. This segmentation allows the total reaction capacity to be maintained while each individual channel experiences lower pressure loss and reduced clogging risk. The plurality of channels work simultaneously to achieve the desired productivity without the drawbacks of single-channel miniaturization.
Solution Approach 2:
A macro-mixing chamber is introduced as an intermediary component between the microchannels and the outlet. This chamber serves as a buffer zone where fluids from multiple microchannels converge and mix before exiting, preventing clogging at the outlet and allowing the microchannels to operate at optimal flow rates without direct clogging risk at the exit point.
2Productivity
If number of microreactors is increased to scale up production, then total reaction capacity is improved, but device complexity and difficulty of detecting failure sites increase
Solution Approach 1:
Multiple microchannels are merged into a single integrated device structure with common inlet and outlet regions. The microchannels are arranged in parallel within one device housing, sharing common macro-mixing chambers and flow distribution systems. This merging approach achieves scaling up while maintaining a single detectable system rather than multiple separate devices.
Solution Approach 2:
The common regions (inlet distribution chamber, outlet collection chamber) serve multiple functions simultaneously: they distribute flow to multiple channels, collect products from all channels, and provide access points for monitoring and maintenance. This multi-functionality reduces the overall device complexity compared to having separate independent reactors.
3Productivity
If high feeding pressure is applied to maintain flow in microchannels, then reaction productivity is maintained, but energy consumption increases and system reliability decreases
Solution Approach 1:
The total flow requirement is segmented across multiple parallel microchannels, reducing the flow rate through each individual channel. Since pressure loss in microchannels is proportional to the square of flow rate, this segmentation dramatically reduces the pumping pressure required for each channel while maintaining the same total productivity.
Solution Approach 2:
The system transitions from a single-channel one-dimensional flow to a multi-channel parallel flow architecture. This dimensional change in the flow path configuration allows the system to achieve the same throughput with lower pressure requirements by distributing the flow load across multiple pathways.
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 enables efficient and stable processing, preventing clogging and flow disturbances, ensuring homogeneous processing and effective formation of microparticles, while maintaining uniformity even at high reaction speeds and varying viscosities, and allows for precise control of reaction sequences and product properties.
Implementation Method 1
a first fluid containing a material to be processed is introduced between the processing surfaces by a micropump effect in a depression arranged on at least one of the processing surfaces from inside to outside of the radial direction of the rotating processing surfaces
Implementation Method 2
generating a spiral laminar flow and potentially a perpendicular flow to enhance mixing and temperature homogenization
Data Source
AI summary
A fluid is processed between processing surfaces capable of approaching to and separating from each other, at least one of which rotates relative to the other. A first fluid is introduced between processing surfaces, by using a micropump effect acting with a depression arranged on the processing surfaces from the center of the rotating processing surfaces. A second fluid, independent of this introduced fluid, is introduced from another fluid path that is provided with an opening leading to the processing surfaces, whereby the processing is done by mixing and stirring between the processing members.