Microreactor Fluid Mixing with Detection Sensors
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Solution Overview
Problem
Conventional microreactor systems face challenges in precisely mixing fluids due to timing deviations and flow rate differences, leading to unintended solid formation and contamination, especially when using pumps to introduce fluids into microchannels with varying inner diameters and compositions.
Innovation Solution
A microreactor system with two inlets and separate pumps for each fluid, equipped with detection sensors to stop and resume fluid transfer at precise timing, ensuring fluids reach the junction simultaneously, reducing flow rate differences and preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pump is used to transfer multiple fluids into the microreactor, then the device complexity is reduced, but the mixing precision and timing accuracy deteriorate due to flow rate differences and timing deviations
Solution Approach 1:
The single pump system is segmented into multiple independent pumps, with each pump dedicated to transferring a specific fluid. This segmentation allows independent control of each fluid's flow rate and timing, eliminating the timing deviations and flow rate differences that occur when using a single pump for multiple fluids.
Solution Approach 2:
Fluid detection sensors are installed at the inlets of the microreactor to detect the arrival of each fluid. The detection signals are fed back to the control unit, which automatically stops the transfer of each fluid when its detection sensor detects fluid arrival, ensuring precise timing synchronization at the junction.
2Productivity
If pump transfer is used to introduce fluids into microchannels, then the fluid transfer efficiency is improved, but timing deviations occur leading to unintended solid formation and contamination
Solution Approach 1:
The system performs preliminary actions by detecting fluid arrival at the inlet before the fluids actually mix at the junction. The control unit stops the transfer of each fluid in advance based on detection sensor signals, ensuring that fluids arrive at the junction simultaneously and mix at the intended timing, preventing premature solid formation.
Solution Approach 2:
Detection sensors provide real-time feedback on fluid arrival at each inlet, allowing the control unit to automatically adjust and stop transfers to achieve precise synchronization at the junction, eliminating timing deviations that cause solid formation and contamination.
3Manufacturing precision
If separate pumps are used for each fluid with detection sensors, then the fluid mixing timing precision is improved, but the device complexity and cost increase
Solution Approach 1:
The system employs self-service mechanisms where detection sensors automatically detect fluid arrival and trigger the control unit to stop transfers. This automated feedback control eliminates the need for complex manual timing coordination or sophisticated flow control algorithms, achieving precise timing with a relatively simple system architecture.
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
The system achieves precise timing for fluid mixing, preventing contamination and solid formation, and optimizing the mixing process by synchronizing fluid arrivals at the junction, thus enhancing reaction efficiency and reducing waste.
Implementation Method 1
The microreactor uses a microchannel as a reaction field, and can rapidly mix fluids by molecular diffusion.
Implementation Method 2
a first liquid phase detector that detects an arrival of the first liquid at the first inlet, and a second liquid phase detector that detects an arrival of the second liquid at the second inlet
Data Source
AI summary
A microreactor system that can mix fluids at precise timing has two inlets into which fluids are introduced and merges, in a channel, a first fluid introduced from a first inlet and a second fluid introduced from a second inlet, a first pump that sends the first fluid toward the inlets, and a second pump that sends the second fluid toward the inlets, a first fluid detector that detects an arrival of the first fluid at the first inlet, and a second fluid detector that detects an arrival of the second fluid at the second inlet.