Adsorption Filter Pore Volume Optimization

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Solution Overview

Problem

Existing adsorption filters using powdery activated carbon and fibrous binders face issues with increased pressure loss and clogging, leading to decreased water flow rates and filter strength, which compromises the removal of harmful substances like chlorine and trihalomethanes from tap water.

Innovation Solution

An adsorption filter with a density of 0.400 g/ml or more and a reduced pore volume at 1 to 20 μm, as measured by mercury intrusion porosimetry, is designed to enhance adsorption performance while minimizing clogging, using a combination of activated carbon and a fibrous binder, with specific ratios of pore volumes and benzene adsorption performance to optimize filtration capabilities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fine powder activated carbon is used in the filter, then adsorption performance is improved, but pressure loss increases and clogging occurs

Engineering Contradiction:

Improveadsorption performanceVSAvoidpressure loss and clogging

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention changes the pore volume parameter of the activated carbon to 0.60 ml/g or less, which resolves the contradiction by reducing the pore volume to prevent fine powder clogging while maintaining adsorption performance through optimized pore structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite structure combining activated carbon with a fibrous binder, where the binder matrix supports the activated carbon particles, preventing clogging while maintaining adsorption capability

Inventive Principle:

Principle #40Composite materials

2Reliability

If powdery activated carbon is used, then adsorption capability is enhanced, but molded body strength decreases

Engineering Contradiction:

Improveadsorption capabilityVSAvoidmolded body strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention creates a composite molded body where fibrous binder provides structural strength while activated carbon particles provide adsorption capability, resolving the contradiction between strength and adsorption

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention optimizes the density parameter to 0.400 g/ml or more, which ensures sufficient molded body strength while maintaining high adsorption capability through optimized material packing

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 filter achieves excellent water-passing properties and high adsorption performance, effectively removing harmful substances like chloroform while reducing the likelihood of clogging, maintaining sufficient adsorption capacity and filtration efficiency.

Implementation Method 1

an adsorption filter containing an activated carbon... removal of harmful substances contained in tap water, such as free residual chlorine, VOC (volatile organic compounds)

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS10987650B2Adsorption filter

Publication Date: 2021.04.27 KURARAY CO LTD

AI summary

One aspect of the present invention relates to an adsorption filter containing an activated carbon and a fibrous binder. The adsorption filter has a density of 0.400 g/ml or more, and a pore volume at a pore diameter of 1 to 20 μm is 0.60 ml/g or less as measured by mercury intrusion porosimetry.