Structured Packing Edge Webs for Column Separation Efficiency
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Solution Overview
Problem
Existing column designs for thermal separation processes face challenges in reproducibility and scalability on a laboratory scale, leading to increased costs and inefficient separation performance due to issues with heat losses, liquid distribution, and wall influence, which are exacerbated by reduced apparatus dimensions.
Innovation Solution
A structured pack for columns featuring a grille with inclined edges and connecting elements that form a widening circumference, directing liquid flow effectively and enhancing heat exchange between phases, fabricated using additive manufacturing processes like 3D printing with materials such as metallic or ceramic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If column dimensions are reduced to minimize equipment size and costs, then equipment dimensions and costs are reduced, but separation efficiency and reproducibility deteriorate due to increased wall influence and non-ideal liquid distribution
Solution Approach 1:
The invention applies different structural characteristics to different regions of the packing. The edge portion features a specific structure with edge elements that have different properties (such as inclination angle, spacing, or geometry) compared to the central region. This local differentiation addresses the specific problem of wall influence and liquid maldistribution at the column periphery while maintaining efficient packing in the central region, thereby enabling small column dimensions without sacrificing separation efficiency.
2Volume of stationary object
If column dimensions are reduced, then equipment size is minimized, but liquid distribution uniformity worsens due to increased wall influence
Solution Approach 1:
The packing structure implements local quality by providing specialized edge elements at the periphery that differ from the central packing structure. These edge elements are designed with specific characteristics (such as different spacing, inclination, or geometry) to promote uniform liquid distribution and reduce wall influence effects, thereby maintaining stable liquid composition distribution even in reduced-size columns.
Solution Approach 2:
The edge elements are positioned at the periphery of the packing to preemptively address liquid distribution issues before they affect the central region. By capturing and redistributing liquid at the edge portions, the structure prevents wall influence and maldistribution from propagating into the central packing area, ensuring uniform liquid distribution throughout the column.
3Volume of stationary object
If conventional packings are used in small columns, then equipment dimensions are reduced, but reproducibility of experimental results deteriorates
Solution Approach 1:
The invention provides a packing structure with differentiated edge and central regions that specifically addresses the non-ideal flow patterns in small columns. The edge elements with their distinct geometry and arrangement create more uniform and predictable flow conditions, leading to reproducible experimental results even in reduced-size columns where wall influence is significant.
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 structured pack improves reproducibility and separation performance, allowing for more precise interpretations and reduced column dimensions, thereby minimizing costs and security surcharges, while maintaining efficient separation efficiency.
Implementation Method 1
edge webs (2) which form the outer edge of the packing in sections and which extend downwardly inclined into the interior of the packing
Implementation Method 2
Separation takes place by utilizing the equilibrium concentration differences between the liquid and vapor phases, with both phases flowing in countercurrent
Implementation Method 3
a vapor phase and a liquid phase flow in countercurrent
Implementation Method 4
Rectification is carried out in columns in which a vapor phase and a liquid phase flow in countercurrent. Separation takes place by utilizing the equilibrium concentration differences between the liquid and vapor phases
Implementation Method 5
the lower-boiling components accumulate in the vapor phase and are carried to the top of the column by the vapor stream
Data Source
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AI summary
The invention relates to a structured packing for a column, wherein the packing comprises a grid of struts (1, 2) which are directly and/or connected to one another via connecting elements (3), the outer edge of the packing being formed at least partially by edge struts (2) which extend downwards into the interior of the packing and have a circumferentially extending widening (5) at their outer end forming the edge of the packing. The invention further comprises a column equipped with a structured packing.