Shell-and-Tube Apparatus with Detachable Tube Plates
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Solution Overview
Problem
Existing shell-and-tube apparatuses face issues with tube deformation due to temperature differences and limited flexibility for tube replacement or maintenance, leading to potential fluid leaks, especially in high-pressure and high-temperature applications.
Innovation Solution
A shell-and-tube apparatus design featuring detachable tube plates with a sealing element, allowing for movement to accommodate thermal expansion and prevent fluid mixing, using a gland seal for sealing and a divided stop for easy tube plate installation and removal, enabling straight tube configuration for easier inspection and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tube plates are fixed in the housing using flange connections, then the structure is stable and reliable, but the tubes and housing deform due to different longitudinal expansions at large temperature differences
Solution Approach 1:
The invention transforms the static fixed connection into a dynamic movable connection. The tube plate is equipped with a movable connection structure that allows it to move relative to the housing along the axial direction, enabling automatic adjustment to compensate for differential thermal expansion between tubes and housing while maintaining structural integrity
Solution Approach 2:
The invention changes the connection parameter from fixed to movable. By introducing a movable connection structure with guiding elements and sealing elements, the system allows positional parameter changes of the tube plate relative to the housing, accommodating thermal expansion differences without compromising sealing or structural stability
2Stability of the object's composition
If compensators are used on the shell side to avoid tube deformation, then tube deformation is prevented, but the apparatus is limited to low-pressure range with limited wall thickness and creates weak points leading to medium leakage
Solution Approach 1:
The invention extracts the compensating function from the shell side and relocates it to the tube plate connection structure. By moving the movable connection structure to the tube plate, the compensator is removed from the shell side, eliminating the weak point that caused medium leakage while maintaining the ability to compensate for thermal expansion
Solution Approach 2:
The movable connection structure acts as an intermediary between the tube plate and housing. It provides both the compensating function for thermal expansion and the sealing function through integrated sealing elements, replacing the problematic shell-side compensator and eliminating the leakage issue
3Stability of the object's composition
If the tube plates are fixed in the housing, then the bundle of tubes is stable, but it is not possible to replace tubes or perform cleaning work in a simple manner
Solution Approach 1:
The movable connection structure enables dynamic adjustment during operation for stability, but allows easy detachment for maintenance. The guiding elements and sealing elements are designed to facilitate simple assembly and disassembly, enabling tube replacement and cleaning work without complex procedures while maintaining operational stability
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 ensures effective sealing and movement compensation for thermal expansion, preventing fluid leaks and allowing for easy tube maintenance and replacement, even under high pressure and temperature conditions, while maintaining efficient heat transfer.
Implementation Method 1
especially at large temperature differences between the medium flowing through the tubes and the medium flowing around the tubes, longitudinal expansions of the tubes and of the shell are different, so that the tubes can deform in the shell-and-tube apparatus
Data Source
AI summary
The invention relates to a shell-and-tube apparatus comprising a housing (3) having a bundle (9) of tubes accommodated therein, where the tubes (15) are joined on one side to a first tube plate (11) and on the side opposite the first tube plate (11) to a second tube plate (13), with the first and second tube plates (11, 13) being fastened detachably in the housing (3). The side of the first tube plate (11) opposite the tubes (15) rests against a stop (31) on the housing (3) and is fixed on the stop (31) and the second tube plate (13) is installed with a sealing element (41) in the housing (3). The invention further relates to the use of the shell-and-tube apparatus.