Helical Flow Catalytic Reactor for Uniform Heat Transfer
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Solution Overview
Problem
Current catalytic heat exchange reactors face challenges in providing a cost-effective solution for utilizing waste heat from primary reforming processes and require reduced material usage for heat transfer tubes, while also ensuring uniform heat transfer across all tubes.
Innovation Solution
A catalytic heat exchange reactor design featuring a shell-and-tube configuration with helical flow on the shell side, utilizing a central mixed gas tube and a staircase baffle system to achieve balanced heat transfer, reducing pressure drop and material usage through a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional heat exchange reactors are used, then heat transfer can be achieved, but uniform heat transfer across all tubes is difficult to achieve and material usage is excessive
Solution Approach 1:
The patent introduces a helical flow configuration where the heat exchange medium flows in a spiral path through the shell side of the reactor. This curved flow pattern creates more uniform velocity distribution and pressure drop across all heat transfer tubes, achieving uniform heat transfer while allowing for compact reactor design with reduced material requirements.
Solution Approach 2:
The patent modifies the flow parameters by implementing helical flow instead of conventional straight or cross-flow patterns. This changes the velocity profile, pressure distribution, and residence time characteristics of the heat exchange medium, resulting in improved heat transfer uniformity across all tubes while enabling more efficient use of materials.
2Reliability
If more heat transfer tubes are used to improve heat transfer uniformity, then heat exchange performance improves, but production cost and material usage increase
Solution Approach 1:
By implementing helical flow, the patent achieves uniform heat transfer distribution across a smaller number of tubes compared to conventional designs. The spiral flow pattern ensures that all tubes receive relatively equal heat exchange medium flow, eliminating the need for excessive tubing while maintaining high reliability and uniformity in heat transfer performance.
3Device complexity
If conventional straight flow is used, then reactor design is simple, but heat transfer uniformity is poor and pressure drop is high
Solution Approach 1:
The patent employs helical flow configuration which, while slightly more complex than straight flow, provides dramatically improved heat transfer uniformity. The helical baffles guide the heat exchange medium in a spiral path, ensuring uniform distribution across all tubes and reducing pressure drop, while maintaining a relatively simple shell-and-tube reactor structure.
4Productivity
If larger reactor volume is used to accommodate more tubes for better heat transfer, then heat exchange capacity improves, but reactor footprint and material usage increase
Solution Approach 1:
The helical flow configuration enables highly efficient heat transfer within a compact reactor volume. The spiral flow pattern maximizes the utilization of available reactor space and ensures uniform heat exchange across all tubes, achieving high heat exchange capacity without increasing reactor footprint or material requirements.
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 design achieves uniform heat transfer across all heat transfer tubes, lowers production costs, and reduces material requirements, resulting in a more efficient and cost-effective reactor with a compact footprint.
Implementation Method 1
a heat-exchanging medium outside the tubes heats or cools the tubes
Implementation Method 2
at least a part of the fluid flow is helical, which improves and balances the heat transfer
Implementation Method 3
A catalytic heat exchange reactor with helical flow... which improves and balances the heat transfer
Data Source
AI summary
The present invention relates to a catalytic heat exchange reactor for carrying out endothermic or exothermic catalytic reactions with at least one helical upward flow around the heat transfer tubes and a central mixed gas tube.