Purification Column Distribution Plate Adsorbent Channeling

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Solution Overview

Problem

Existing purification columns face challenges in controlling fluid flow distribution, leading to channeling and reduced adsorptivity due to uneven packing of adsorbents, increased pressure loss, and complex manufacturing processes, especially when using fiber bundles or beads, which can result in decreased efficiency and increased costs.

Innovation Solution

A purification column design featuring a cylindrical housing with a distribution plate having salients that extend into the adsorbent, controlling the packing rate and fluid flow distribution by adjusting channel resistance, thereby minimizing fluid volume and preventing channeling, while maintaining excellent adsorptivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If small diameter adsorbent beads are used to increase surface area per unit volume, then adsorptivity is improved, but pressure loss increases due to narrowed gaps between beads

Engineering Contradiction:
Improvesurface area per unit volumeVSAvoidpressure loss
Core Design Contradiction:
Quantity of substanceVSLoss of energy

Solution Approach 1:

The patent employs porous adsorbent beads with controlled pore structures that provide high internal surface area while maintaining adequate inter-particle void space. The porous structure allows fluid to flow through the beads themselves rather than only through narrow inter-particle gaps, thereby increasing effective surface area for adsorption without proportionally increasing pressure loss.

Inventive Principle:
Principle #31Porous materials

2Productivity

If adsorbent is packed densely to improve adsorptivity, then adsorption efficiency increases, but channeling occurs due to non-uniform flow distribution

Engineering Contradiction:
Improveadsorption efficiencyVSAvoidflow distribution uniformity
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The patent implements a distribution plate with spatially varying opening patterns and sizes to create locally optimized flow resistance. The plate provides different degrees of flow distribution in different radial zones, ensuring uniform fluid distribution across the entire adsorbent bed even under dense packing conditions. This local customization of flow resistance prevents channeling while maintaining high adsorption efficiency.

Inventive Principle:
Principle #3Local quality

3Quantity of substance

If fiber bundles are used instead of beads to increase surface area, then adsorptivity improves, but manufacturing complexity increases

Engineering Contradiction:
Improvesurface area per unit volumeVSAvoidmanufacturing process complexity
Core Design Contradiction:
Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent utilizes fiber bundles with specifically controlled parameters including fiber diameter, bundle density, and length-to-diameter ratios. By optimizing these parameters, the invention achieves high surface area per unit volume comparable to or exceeding bead structures, while the fibrous morphology naturally provides interstitial flow paths that reduce pressure loss. The standardized fiber bundle construction simplifies manufacturing relative to custom bead formulations.

Inventive Principle:
Principle #35Parameter changes

4Reliability

If distribution plate with many small openings is used to control flow distribution, then channeling is prevented, but pressure loss increases

Engineering Contradiction:
Improveflow distribution uniformityVSAvoidpressure loss
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The distribution plate is segmented into multiple functional zones with different opening characteristics. Rather than using uniformly small openings throughout, the plate incorporates larger openings in regions requiring higher flow rates and smaller openings in regions needing greater flow restriction. This segmentation allows the system to achieve uniform flow distribution across the adsorbent bed while minimizing overall pressure loss by avoiding excessive flow resistance in any single location.

Inventive Principle:
Principle #1Segmentation

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 solution effectively controls fluid flow distribution, reduces channeling, and enhances adsorption efficiency without increasing fluid volume or pressure, simplifying the manufacturing process and maintaining high adsorptivity, even when using fiber bundles or beads.

Implementation Method 1

Purification columns to adsorb substances to be removed from a fluid may have adsorbent of beads, fiber bundle consisting of a plurality of fibers, or knitted fabric

Methodology Applied
Scientific EffectAdsorption: Adsorption

Implementation Method 2

a distribution plate provided at an end face side of the adsorbent, the distribution plate having: a plurality of openings capable of communicating the fluid; a supporting body; and a salient extending from the supporting body toward the adsorbent

Methodology Applied
Scientific EffectFluid flow distribution control through channel resistance adjustment: Pressure Gradient

Data Source

PatentEP3574938B1Purification column
Publication Date: 2024.09.11 TORAY INDUSTRIES INC
  • EP3574938B1 patent drawingFigure 1
  • EP3574938B1 patent drawingFigure 2~3
  • EP3574938B1 patent drawingFigure 4~5

AI summary

The purpose of our invention is to provide a purification column that contains an adsorbent and shows excellent adsorptivity. In order to achieve the purpose, our invention is provided with the following structure. Specifically, this purification column is provided with an adsorbent and a case that contains the adsorbent and has a tubular housing and treatment fluid supply port and discharge port at both ends of the housing. The purification column is characterized in that: a distribution plate is disposed at least on one end face side of the adsorbent; the distribution plate has a plurality of openings that allow communication of the treatment fluid, a support body, and a protrusion extending from the supporting body to the adsorbent side; and at least part of the protrusion is inserted into the adsorbent.