Multi-region slurry reactor vortex partition design
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Solution Overview
Problem
Existing multi-region slurry shell-and-tube reactors face challenges with strong back-mixing during chemical reactions, leading to incomplete conversion of reactants and inefficient heat transfer, particularly in the production of alkyl aluminum chloride, where fine aluminum powder is difficult to separate and heat must be quickly transferred.
Innovation Solution
The reactor is divided into multiple reaction regions with transverse partition plates that include a central hole and auxiliary holes, creating a vortex state to prevent back-mixing by allowing gas-liquid reactants to ascend and descend through these holes, respectively, thereby enhancing mixing and preventing overall back-mixing flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat exchanger is added to the slurry column reactor to handle strong heat release, then heat transfer capability is improved, but the overall back-mixing flow is intensified and heat transfer efficiency deteriorates
Solution Approach 1:
The reactor is divided into multiple reaction regions by transverse partition plates with central holes and auxiliary holes. This segmentation prevents overall back-mixing flow while maintaining heat transfer capability through the partition plates, resolving the contradiction between heat transfer capability and efficiency.
2Device complexity
If the reactor is designed as a single region to simplify structure, then device complexity is reduced, but back-mixing flow occurs and manufacturing precision deteriorates
Solution Approach 1:
The reactor is divided into multiple reaction regions by transverse partition plates with central holes and auxiliary holes. This segmentation prevents overall back-mixing flow while maintaining heat transfer capability through the partition plates, resolving the contradiction between heat transfer capability and efficiency.
3Productivity
If transverse partition plates with multiple holes are added to prevent back-mixing, then back-mixing flow is reduced, but device complexity increases
Solution Approach 1:
The reactor is divided into multiple reaction regions by transverse partition plates with central holes and auxiliary holes. This segmentation prevents overall back-mixing flow while maintaining heat transfer capability through the partition plates, resolving the contradiction between heat transfer capability and efficiency.
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 design effectively prevents overall back-mixing, ensures complete conversion of reactants, and improves heat transfer efficiency by creating a rising and falling circulation phenomenon, resulting in better gas-liquid mixing and reduced dead angles within the reactor.
Implementation Method 1
an auxiliary hole distributed around a central axis of the central hole is provided in each transverse partition plate to generate a vortex state in the reaction region cooperating with the central hole
Implementation Method 2
the gas-liquid mixed reactant in the reaction region ascends through the central hole due to low density, and gaseous reactant in the reaction region descends through the auxiliary hole due to high density, so as to form a rising and falling circulation phenomenon
Data Source
AI summary
The present application discloses a multi-region plasma shell-and-tube reactor comprising a shell body. At least two reaction regions are provided inside the shell body, and a horizontal separation panel is provided between any two adjacent reaction regions, used to separate the two and passing through the tubes. A central hole is provided in the center of any horizontal separation panel, and at least one auxiliary hole distributed around the central axis of the central hole is provided in any horizontal separation panel so as to cooperate with the central hole to cause a vortex state to be formed in a reaction region.