Tubular Reactor Sealing Ring Compression for Diameter Changes
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Solution Overview
Problem
Tubular reactors face challenges with gas leakage due to mismatched conical surfaces, weld shrinkage, and creep growth, which traditional sealing methods struggle to address effectively across a wide temperature range.
Innovation Solution
A sealing system comprising a main body with a circular section and a peripheral wall that matches the inner wall of the tubular reactor, featuring an annular lodging with a sealing ring pushed by an annular pusher, ensuring compression and a tight seal across varying diameters and temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple conical sealing method is used, then the device complexity is reduced, but the sealing reliability deteriorates due to mismatched conical surfaces and fabrication tolerances
Solution Approach 1:
The sealing system employs a conical pusher that changes the geometric parameters of the sealing interface. The conical shape allows for gradual engagement and compensation of dimensional variations, transforming the sealing mechanism from a simple contact to a progressive engagement that maintains reliability despite fabrication tolerances
Solution Approach 2:
The outlet barrier acts as an intermediary element between the outlet reducer and the catalyst tube. This intermediate component provides a dedicated sealing surface that mediates the interface between two potentially mismatched surfaces, ensuring reliable sealing without requiring perfect matching of the primary components
2Ease of operation
If the sealing system is designed to fit the minimum diameter, then the ease of installation is improved, but the sealing reliability deteriorates due to weld shrinkage and creep growth
Solution Approach 1:
The sealing system transitions from a static fit to a dynamic adaptation mechanism. The conical pusher allows the sealing interface to dynamically adjust to diameter changes caused by weld shrinkage and creep growth, maintaining sealing reliability throughout the reactor's operational life while preserving ease of initial installation
Solution Approach 2:
The outlet barrier is pre-positioned to establish a sealing surface that anticipates future diameter changes. This preliminary action creates a sealing interface that is robust against thermal and mechanical variations, ensuring reliability without compromising installation ease
3Device complexity
If traditional sealing methods are used, then the device complexity is minimized, but the adaptability deteriorates due to inability to handle diameter changes and temperature variations
Solution Approach 1:
The system utilizes parameter changes in the conical geometry to adapt to diameter variations. The conical angle and dimensions are specifically designed to accommodate thermal expansion and creep growth, providing adaptability without significantly increasing device complexity
Solution Approach 2:
The sealing system is designed to accommodate thermal expansion effects. The conical pusher and outlet barrier geometry allows for expansion and contraction due to temperature variations, maintaining sealing effectiveness across the operating temperature range while keeping the structure relatively simple
4Reliability
If a tight seal is maintained through compression, then the sealing reliability is improved, but the force required increases due to the need to overcome gas pressure and structural deformations
Solution Approach 1:
The conical geometry distributes the compressive force across a gradually increasing surface area. This curved interface allows the sealing force to be applied more efficiently, reducing the peak force required while maintaining reliable sealing against gas pressure and structural deformations
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 sealing system effectively handles diameter changes and high temperatures, maintaining a tight seal and reducing leakage, even in reactors with existing structural issues like weld shrinkage and creep growth.
Implementation Method 1
the main body having a sufficient weight to push the sealing ring against the inner wall of the tubular reactor
Implementation Method 2
the pusher configured to push the sealing ring in the peripheral wall of the main body
Data Source
AI summary
A sealing system for a tubular reactor comprising an inner wall, comprising a main body having a circular section and comprising a peripheral wall configured so that at least its upper part matches the inner wall of the tubular reactor, said peripheral wall comprising at least an annular lodging comprising a sealing sitting on an annular pusher, with the pusher configured to push the sealing ring in the peripheral wall of the main body and the main body having a sufficient weight to push the sealing ring against the inner wall of the tubular reactor.