Hydrophilic Hydrophobic Composite Packing Rotating Packed Bed

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Solution Overview

Problem

Current rotating packed beds using either hydrophilic or hydrophobic materials fail to optimize mass transfer and mixing performance due to the high-gravity environment, leading to defects such as droplet aggregation and reduced liquid turbulence.

Innovation Solution

A hydrophilic and hydrophobic composite packing-based rotating packed bed system is introduced, where the packing includes a combination of hydrophilic and hydrophobic surfaces, allowing for improved liquid dispersion and wetting efficiency, thereby enhancing mass transfer and mixing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If single hydrophobic packing is used, then liquid dispersion is improved, but droplet aggregation occurs

Engineering Contradiction:

Improveliquid dispersionVSAvoiddroplet aggregation

Core Design Contradiction:

Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The packing structure is designed with different surface properties in different regions: the outer surface is hydrophobic for liquid dispersion, while the inner surface is hydrophilic to prevent droplet aggregation. This local differentiation of surface properties resolves the contradiction between achieving good dispersion and avoiding aggregation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The packing combines hydrophobic and hydrophilic materials in a composite structure. The outer layer uses hydrophobic material for dispersion while the inner layer uses hydrophilic material to maintain droplet stability, thus resolving the contradiction through material composition diversity.

Inventive Principle:

Principle #40Composite materials

2Quantity of substance

If single hydrophilic packing is used, then wetting efficiency is improved, but liquid turbulence is reduced

Engineering Contradiction:

Improvewetting efficiencyVSAvoidliquid turbulence

Core Design Contradiction:

Quantity of substanceVSSpeed

Solution Approach 1:

The packing structure is designed with different surface properties in different regions: the inner surface is hydrophilic for wetting efficiency, while the outer surface is hydrophobic to generate liquid turbulence. This local differentiation of surface properties resolves the contradiction between achieving good wetting and maintaining turbulence.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The packing combines hydrophilic and hydrophobic materials in a composite structure. The inner layer uses hydrophilic material for wetting while the outer layer uses hydrophobic material to induce turbulence, thus resolving the contradiction through material composition diversity.

Inventive Principle:

Principle #40Composite materials

3Quantity of substance

If hydrophilic or hydrophobic materials are used, then mass transfer is improved, but the high-gravity environment characteristics are not considered

Engineering Contradiction:

Improvemass transferVSAvoidhigh-gravity environment adaptation

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The invention changes the surface property parameters of the packing by applying different hydrophobic/hydrophilic treatments to different surfaces. This parameter modification enables the packing to adapt to high-gravity environment characteristics while maintaining effective mass transfer performance.

Inventive Principle:

Principle #35Parameter changes

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 composite packing system effectively disperses liquids uniformly, increases wetting efficiency, and avoids issues like droplet aggregation and reduced turbulence, thereby significantly improving the mass transfer and mixing performance of the rotating packed bed.

Implementation Method 1

the surface of the other is a hydrophobic surface... the hydrophobic packing can sufficiently disperse the liquid so as to make the dispersion of the liquid in the packing zone more uniform

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Implementation Method 2

the wettability of the hydrophilic packing allows the liquid to spread sufficiently so as to increase the wetting efficiency of the packing

Methodology Applied

Scientific EffectHydrophilic effect: Hydrophile

Implementation Method 3

the phenomenon of reduction of liquid turbulence caused to liquid in a single hydrophilic packing zone can be avoided... increases wetting efficiency, and avoids issues like droplet aggregation and reduced turbulence

Methodology Applied

Scientific EffectTurbulence: Turbulence

Data Source

PatentUS12285750B2Hydrophilic and hydrophobic composite packing-based rotating packed bed and system

Publication Date: 2025.04.29 BEIJING UNIV OF CHEM TECH

AI summary

The present application provides a hydrophilic and hydrophobic composite packing-based rotating packed bed and a system. A hydrophobic packing and a hydrophilic packing are formed into a composite packing. When said packing cuts liquid, the hydrophobic packing can sufficiently disperse the liquid so as to make the dispersion of the liquid in the packing zone more uniform, and the wettability of the hydrophilic packing allows the liquid to spread sufficiently so as to increase the wetting efficiency of said packing. The phenomenon of droplet aggregation caused to liquid in a single hydrophobic packing zone and the phenomenon of reduction of liquid turbulence caused to liquid in a single hydrophilic packing zone can be avoided. Therefore, applying a hydrophilic and hydrophobic composite packing to a rotating packed bed can further improve the mass transfer and mixing performance thereof.