Multiple Downcomer Tray Structural Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional multiple downcomer trays face challenges with tray deflection and non-uniform liquid distribution due to weight and liquid load, requiring additional support structures that reduce the mass transfer area and increase material costs, especially in large diameter columns.
Innovation Solution
The design integrates downcomers as part of a support structure, eliminating the need for separate support beams by using extension elements that connect from one column wall to another, allowing the downcomers to provide both fluid flow channels and structural support, maintaining tray flatness and increasing the mass transfer area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If separate support beams are added to prevent tray deflection, then tray flatness is improved, but mass transfer area is reduced and material costs increase
Solution Approach 1:
The downcomers are merged with the support structure by integrating support baffles directly into the downcomer assembly. The support baffles extend along the downcomers and are secured to the tray, combining the fluid conveyance function of downcomers with the structural support function, thereby eliminating the need for separate support beams that would reduce mass transfer area.
Solution Approach 2:
The downcomer assembly is designed to perform multiple functions: it conveys liquid from the upper tray to the lower tray while simultaneously providing structural support to maintain tray flatness. The support baffles integrated into the downcomer assembly serve both as structural supports and as part of the liquid flow management system, reducing the need for additional separate support components.
2Stability of the object's composition
If separate support beams are added to prevent tray deflection, then tray flatness is improved, but device complexity and material costs increase
Solution Approach 1:
The support structure is merged with the downcomer assembly, eliminating the need for separate support beams. The support baffles are integrated into the downcomer construction and secured to the tray using mounting members, reducing the number of separate components and simplifying the overall structure while maintaining tray flatness.
Solution Approach 2:
The downcomer assembly serves dual purposes: liquid conveyance and structural support. By making the downcomer assembly universal (multi-functional), the design reduces device complexity by eliminating the need for separate dedicated support beams, thereby reducing both material costs and structural complexity.
3Ease of operation
If downcomers are made longer to improve liquid flow, then liquid distribution is improved, but tray deflection increases
Solution Approach 1:
The tray support structure is segmented into multiple support baffles distributed along the downcomers rather than relying on a single long support beam. This segmentation allows for better distribution of structural support along the length of the downcomers, reducing deflection while maintaining adequate liquid flow paths.
Solution Approach 2:
The support baffles are pre-installed as part of the downcomer assembly before the tray is put into service. This preliminary action ensures that structural support is already in place to prevent deflection during operation, allowing longer downcomers to be used for improved liquid flow without compromising tray flatness.
Data Source
Figure 1a~1b
Figure 1c
Figure 1d~1f
AI summary
A multiple downcomer tray (1) for a mass transfer column (2) comprises a mass transfer area (4) and a plurality of downcomers (3) for collecting and discharging a fluid from the tray (1), each of the downcomers being shaped as a channel (9), said channel being delimited by a pair of lateral sidewalls (21,22) and an end wall (23,24). The end wall of each downcomer is attachable to an extension element (5) and downcomer (3) and extension element (5) together extend from a first column wall support means (6) to a second column wall support means (7).