Abstract
This paper deals with testing of filters on the basis of visualization of filtration process. A filtration material can be damaged by flow of the filtered medium, high pressure drop and long-term adverse conditions. These negative effects can cause extensive damage of the filtration textile and filtration efficiency decreases. The filter can be also fractured during manufacturing, processing or by improper manipulation. A testing of a purposely damaged filtration textile is described in the article. Experiments were performed on the filtration setup which permits an optical entrance to the position where a sample of filter is placed. A laser sheet is directed into this place. Scattered light from seeding particles in front of and behind the filter is captured by a digital camera. Images from the camera are analyzed and the filtration efficiency versus time and also versus position can be obtained. Measuring chain including light scattering theory and measuring of light intensity by a digital camera are also discussed in the article.
Highlights
One of the most important filtration parameters is the filtration efficiency
The filtration process is visualized in time and versus position
Measuring chain including light scattering theory and measuring of light intensity by a digital camera are discussed in the article
Summary
One of the most important filtration parameters is the filtration efficiency. The filtration process is visualized in time and versus position. This testing method allows detecting local places with lower filtration efficiency and finding fractures in a filtration media. Measuring chain including light scattering theory and measuring of light intensity by a digital camera are discussed in the article. Non-woven filtration materials are used in wide range of industries. This paper is scoped on liquid filtration. The most important liquid filtration applications are in food, pharmaceutics, portable water, hydraulic oils, fuels and solvents. Many different kinds of filtration media which differ by materials, construction and performance characteristics are made. The filtration materials are used in a wide range of operating conditions. The filtration properties can change suddenly or gradually during the filtration process and it is needed to detect the defects [1]
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