Corrugated Structured Packing With Aperture-Controlled Pressure Drop
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Solution Overview
Problem
Existing structured packing in mass transfer columns experiences high pressure drop without a significant decrease in mass and energy transfer efficiency, which is undesirable for operational efficiency.
Innovation Solution
The structured packing module features corrugated sheets with oblique angled corrugations and apertures distributed with higher density on corrugation sidewalls, along with spacers to prevent liquid accumulation, enhancing specific surface area and reducing pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the specific surface area of structured packing is increased to enhance mass and energy transfer, then mass transfer efficiency is improved, but pressure drop increases
Solution Approach 1:
The packing sheets are designed with non-uniform aperture distribution, where aperture density is higher in regions where liquid accumulation is more likely to occur. This local variation in quality allows the packing to maintain high mass transfer efficiency in critical areas while reducing overall pressure drop by optimizing the balance between surface area and flow resistance.
Solution Approach 2:
The structured packing incorporates apertures (holes) throughout the packing sheets, creating a porous structure that facilitates fluid flow through the packing layer. The strategic distribution of these pores allows liquid to bypass high-resistance regions, reducing pressure drop while maintaining adequate surface area for mass transfer.
2Ease of manufacture
If conventional structured packing is used with uniform aperture distribution, then manufacturing is simplified, but liquid accumulation occurs reducing mass transfer efficiency
Solution Approach 1:
The packing sheets are designed with non-uniform aperture distribution, where aperture density is higher in regions where liquid accumulation is more likely to occur. This local variation in quality allows the packing to maintain high mass transfer efficiency in critical areas while reducing overall pressure drop by optimizing the balance between surface area and flow resistance.
Solution Approach 2:
The non-uniform aperture distribution is designed in advance to prevent liquid accumulation before it occurs. By placing more apertures in regions prone to liquid buildup, the packing proactively counteracts the tendency toward liquid accumulation, maintaining optimal mass transfer conditions throughout operation.
Data Source
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AI summary
A cross-corrugated structured packing element is provided for use in mass transfer or heat exchange columns. The packing element has a plurality of packing layers positioned in an upright, parallel relationship to each other and including corrugations formed of alternating peaks and valleys and corrugation sidewalls extending between the peaks and valleys. The packing element also includes a plurality of apertures each presenting an open area. The apertures are distributed such that the corrugation sidewalls have a greater density of open areas than any density of the open areas that may be present in the peaks and valleys. Some of the apertures may be present in the peaks and the valleys to facilitate liquid distribution. The apertures may also be placed in rows or other patterns that are aligned in a direction along a longitudinal length of the corrugations.