Segmented Dividing Wall Column Fabrication for Better Sealing
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Solution Overview
Problem
The processing industry has been reluctant to adopt dividing wall columns due to control and operational complexities, simulation difficulties, and high fabrication costs associated with heavy, large-diameter partition walls, which pose installation challenges and affect sealing effectiveness.
Innovation Solution
A method for fabricating dividing wall columns using sheet metal segments with specific arcuate and z-shaped bends, allowing for the formation of cylindrical segments that can be easily assembled and welded externally, reducing internal welds and enhancing sealing, while accommodating different materials and mechanical strengthening for better structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-piece partition is used in the column, then the partition can prevent transverse mixing of liquid and vapor streams, but the partition becomes heavy and difficult to install with mechanical assistance, increasing costs and safety risks
Solution Approach 1:
The partition is divided into multiple segments that can be installed separately and then joined together using welding or other connection methods. This segmentation reduces the weight of individual components, eliminates the need for heavy mechanical lifting equipment, and maintains sealing effectiveness through proper joint design between segments.
2Area of stationary object
If the column diameter increases, then the partition can serve larger processes, but the partition weight increases making installation more difficult and costly
Solution Approach 1:
The partition is divided into multiple segments that can be installed separately and then joined together using welding or other connection methods. This segmentation reduces the weight of individual components, eliminates the need for heavy mechanical lifting equipment, and maintains sealing effectiveness through proper joint design between segments.
3Reliability
If continuous partitions are used, then the separation of multicomponent feed stocks is improved, but the fabrication costs become prohibitive due to sealing requirements
Solution Approach 1:
The partition is divided into multiple segments that can be installed separately and then joined together using welding or other connection methods. This segmentation reduces the weight of individual components, eliminates the need for heavy mechanical lifting equipment, and maintains sealing effectiveness through proper joint design between segments.
4Device complexity
If a single divided wall column is used to replace two distillation columns, then the equipment size and cost are reduced, but the control and operational complexity increases
Solution Approach 1:
The divided wall column is designed to perform multiple separation functions within a single column structure. The partition creates multiple distillation zones that can handle different feed compositions and product specifications, allowing one column to replace what would traditionally require two or more separate columns, thereby reducing overall equipment complexity despite the enhanced operational capabilities.
Data Source
Figure 1~3
Figure 4a~5c
Figure 6~7b
AI summary
The invention relates to a method producing a portioned column by forming a first segment and a third segment into arcuate segments, and attaching these arcuate segments to a second z-shaped segment to from two contiguous volumes with approximately simi-circular cross-sections that combine to form a partitioned, approximately cylindrical segment.