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Using Textiles for Filtration

19 Jan 2024  |
Industrial textiles play an important and profitable role as filtration media. Depending on the filtration purpose, certain requirements and industry standards must be fulfilled for the production of filters.

Definition filtration

Filtration can be described as the separating of substances based on their different physical and chemical qualities. Mostly, we think of it as the removal of solid particles from a mixture containing both solids and liquids. Usually, a tool that contains some form of pores is used, which allows the fluid portion, but not the solid portion, to pass through.

Introduction to filtration

Filtration is used to separate particles and fluid in a suspension, where the fluid can be a gas, liquid, or supercritical fluid. Depending on the application, either one or both components can be isolated. Both textile fibers and fabric form an essential part of filtration.

What are filter fabrics?

Filter fabrics are most commonly geotextile fabrics for drainage and erosion control applications and can be segmented into woven and nonwoven. The main utility of filter fabrics is to filter solids from liquids. (filter fabrics containing both synthetic fibers and wool fibers capture dust particles through additional electrostatic charge properties, which enhances initial filtration efficiency without increases to airflow resistance, and especially for capture submicron particles.)

Dry Filtration

Dry filtration is the process of separating solid particles from air streams to reduce dust and particulate emissions to protect employees and the environment. Oversized solids in the air streams get caught by a filtration medium reducing the contamination of the air streams. Depending on the thickness of the filtration medium, air streams might still contain solid particles.

Dry Filtration Media

In their applications, the filter media may be expected to operate for long periods, frequently in the most demanding physical and chemical conditions; therefore, the filter performance is crucial to the success of the industrial operation.

Wet filtration

Wet filtration systems remove solids from liquids by flowing the contaminated liquid through a filter media that will retain the solids and allow only clean product to pass through. Liquid filtration is the removal of solids from liquids by flowing the contaminated liquid through a filter media that will retain the solids and allow only clean product to pass through. Using a wet filtration medium to remove a volume of solids from a liquid requires that the medium should contain uniform pores smaller than the smallest particle to be removed. It should also be strong enough and possess sufficient area to hold the required volume of solids.

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