Continuous Flow Reactor Mixer With Segmented Jet Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tubular reactors are inefficient in inducing rapid mixing between reagents, particularly when they meet coaxially, leading to increased reaction times and costs in chemical processes.
Innovation Solution
A mixer for continuous flow reactors that segments a primary reactant flow into multiple jets injected into a secondary reactant flow through channels of constant width, ensuring high jet velocity and localized turbulence with a Jet Mixing Number of at least 0.9, minimizing back-mixing and undesired byproduct formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reagents are injected coaxially into tubular reactors, then the reactor structure is simple, but mixing efficiency is poor leading to increased reaction times
Solution Approach 1:
The primary reactant flow is segmented into multiple smaller jets through a multi-port injection system. This segmentation increases the interfacial contact area between reagents and enhances mixing efficiency by creating numerous localized turbulence zones throughout the channel cross-section, directly resolving the poor mixing efficiency of coaxial injection.
Solution Approach 2:
The injection system transitions from a single-point coaxial injection to a distributed multi-port injection arrangement across the channel cross-section. This dimensional change enables simultaneous mixing at multiple locations, dramatically reducing the overall mixing length and reaction time while maintaining structural simplicity.
2Productivity
If reagents are injected at angles into tubular reactors, then mixing efficiency improves, but device complexity increases
Solution Approach 1:
The injection system merges multiple injection functions into a single integrated mixer component. The multi-port structure combines segmentation, distribution, and injection functions in one element, achieving angle-based mixing efficiency without the complexity of separate injection mechanisms or movable parts.
Solution Approach 2:
The constant width channel geometry itself generates the desired flow patterns and turbulence. The channel design automatically ensures proper jet impingement and mixing without requiring external control systems, adjustable components, or complex injection mechanisms, making the system self-regulating and simple to operate.
3Stability of the object's composition
If channel width varies to accommodate flow, then flow distribution may be uneven, but constant width complicates flow adaptation
Solution Approach 1:
The system maintains constant geometric parameters (channel width) while adapting to varying flow conditions through changes in flow parameters (velocity, turbulence intensity). The constant width ensures uniform flow distribution, while the jet velocity and turbulence automatically adjust based on operating conditions to maintain effective mixing across different flow rates.
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 achieves rapid mixing with minimal back-mixing, reducing reaction times and costs by ensuring high jet velocity and localized turbulence, suitable for sensitive and fast-reacting flows.
Implementation Method 1
Turbulence promotes chemical reactions, heat-transfer operations, mixing, and combustion processes in many chemical processes. Effective use of turbulence can increase the interfacial contact of reagents so as to decrease reaction times
Implementation Method 2
the primary reactant flow is segmented through a plurality of ports into many smaller flows that are injected as jets into a secondary reactant flow in channels of the mixer
Implementation Method 3
the channel through which the secondary reactant flow moves and into which the primary reactant flow is injected can have a constant width dimension to enhance even flow distribution and local turbulence
Implementation Method 4
the number and diameter of the ports to be sized to provide a Jet Mixing Number, for example, of at least 0.9. Having the Jet Mixing Number of at least 0.9 combined with the number of ports and their position relative the opposite wall of the channel allows for a higher degree of segmentation of the jets while maintaining high jet velocity and good localized mixing
Data Source
AI summary
A mixer for a continuous flow reactor and methods for forming the mixer and the operation thereof. The mixer allows for segmentation of a primary reactant flow through a plurality of ports into many smaller flows that are injected as jets into a secondary reactant flow in channels of the mixer. The channel has a constant width dimension to enhance even flow distribution and local turbulence of the primary and secondary reactant flows. The constant width dimension of the channel and the size and number of the ports of the mixer can be configured to ensure the primary reactant flow injected into the channel directly impinges on a surface of the channel that is opposite the injection point at normal operating conditions.