Nanoparticle Production via Spiral Flow in Reaction Tubes
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Solution Overview
Problem
Existing nanoparticle production methods face challenges in achieving uniform particle size and mass production due to issues such as narrow microchannel blockages, low collision probabilities in laminar flow, and short reaction times, making it difficult to control and sustain the production of nanoparticles with precise size and quality.
Innovation Solution
A nanoparticle production method involving a spiral flow in a reaction tube with temperature control, where the ingredient liquid is mixed with a solvent and formed into a spiral flow along the inner surface of the tube, allowing for extended reaction times and increased collision probabilities, enabling the production of uniform nanoparticles with adjustable particle sizes and facilitating continuous mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microchannel is used for nanoparticle production, then productivity is improved, but manufacturing precision deteriorates due to blockage and difficulty in controlling particle size uniformity
Solution Approach 1:
The reaction system is segmented into multiple independent reaction tubes rather than using a single microchannel. Each reaction tube operates independently with its own flow control, preventing blockage from affecting the entire system and allowing parallel production to maintain high productivity while ensuring uniform particle size through consistent reaction conditions in each tube
Solution Approach 2:
The invention transitions from two-dimensional microchannel flow to three-dimensional spiral flow within reaction tubes. The spiral flow pattern creates radial and axial velocity components that enhance mixing and collision probabilities without the confinement issues of microchannels, enabling both high productivity and precise particle size control
2Manufacturing precision
If laminar flow is used in reaction tube, then manufacturing precision is improved, but productivity deteriorates due to low collision probability and short reaction time
Solution Approach 1:
The flow regime is dynamically changed from static laminar flow to dynamic spiral flow. The spiral flow continuously changes the flow direction and creates radial pressure gradients that enhance mixing and collision frequencies. This dynamic flow pattern maintains the controlled conditions needed for uniform particle size while significantly improving collision probability and reaction efficiency
Solution Approach 2:
The invention uses hydraulic principles to generate spiral flow through controlled liquid injection and flow rate regulation. By manipulating the hydraulic conditions (flow rates, pressure gradients) of the ingredient liquid and solvent, the system achieves enhanced mixing and collision probabilities without sacrificing the controlled environment needed for uniform nanoparticle production
3Manufacturing precision
If reaction time is extended for uniform nanoparticle production, then manufacturing precision is improved, but productivity deteriorates due to reduced production rate
Solution Approach 1:
The reaction process is segmented across multiple parallel reaction tubes, allowing the system to maintain extended reaction times in each tube (for uniform particle size) while processing multiple streams simultaneously (for high productivity). The overall production rate is the sum of outputs from all parallel tubes
Solution Approach 2:
The ingredient liquid is pre-mixed with the solvent in a controlled manner before entering the reaction tube, creating optimal initial conditions for nanoparticle formation. This preliminary mixing action ensures uniform distribution of reactants, allowing the reaction to proceed efficiently at controlled rates that produce uniform particles without requiring excessively long reaction times
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 method allows for the efficient synthesis of nanoparticles with controlled sizes and high yields, overcoming previous limitations by enhancing reaction time and collision probabilities, resulting in improved uniformity and scalability of nanoparticle production.
Implementation Method 1
said heating unit heating said solvent and said ingredient liquid in said reaction tube to a predetermined reaction temperature
Implementation Method 2
forming a spiral flow of said ingredient liquid supplied from said inflow end along an inner surface of an outer wall in said reaction tube
Data Source
AI summary
A nanoparticle production apparatus and automatic production apparatus that allow continuous mass production of nanoparticles with a uniform particle diameter and allow freely adjusting the generation time are provided. This nanoparticle production apparatus is characterized by being configured from: reaction tubes (30, 40) which are filled with the same solvent (11) as that in a ingredient liquid (18), which is used in nanoparticle production and comprises an ingredient material (12) mixed into the solvent (11); a heating apparatus (22) which controls the temperature of the solvent (11) in the reaction tubes (30, 40) to the synthesis temperature of the nanoparticles (26); inflow ends (30e, 40e) of the reaction tubes into which the ingredient liquid (18) is supplied; rotors (35, 45) which form spiral flows (e, j) along the inner surface of the outer walls (30h, 40h) of the reaction tubes while mixing the ingredient liquid (18) supplied and the solvent (11) present in the reaction tubes (30, 40); and outflow ends (30f, 40f) of the reaction tubes (30, 40) for forming, in the spiral flows (e, j), nanoparticles (26) from the ingredient material (12) and discharging a generation liquid (65) containing the nanoparticles (26).