Preparation and Characterization of Porous Composite Filter Medium by Polytetrafluoroethylene Foam Coating

Park, Byung Hyun; Lee, Myong‐Hwa; Kim, Sang Bum; Kim, Gyung Soo; Jo, Young Min

doi:10.3155/1047-3289.60.2.137

Cited by 21 publications

(7 citation statements)

References 5 publications

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“…Figure 7 shows the filter cleaning efficiency, " d , as defined in eq (5). It is a relative correlation factor between the residual pressure drop and the initial pressure drop: where ÁP Lo , ÁP Hi , and ÁP Li represent the pressure drop of a fresh filter medium without any dust deposit, the highest pressure drop at the ith filtration cycle, which means the maximum allowable pressure drop, and the residual pressure drop right after the ith cleaning, respectively (Park et al, 2010). Filter cleaning efficiency gradually decreased as dust filtration continuously proceeded.…”

Section: Resultsmentioning

confidence: 99%

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Influence of pleat geometry on filter cleaning in PTFE/glass composite filter

Park

Lee

et al. 2012

Journal of the Air & Waste Management Association

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A pleated filter bag is often used to treat exhaust gas in many industrial applications, due to its fairly high dust collection efficiency and relatively low pressure drop. This work deals with the optimum pleating geometries of a pleated filter made with a newly developed PTFE/glass composite filter. It was found that pleating geometries, including pleat height and pleat pitch, directly affect the cleaning efficiency. The design index, a, which stands for the ratio of pleat height to pleat pitch, is 1.48 for optimum operation. When the a value was higher than 1.48, the pressure drop across the pleated filter medium increased, resulting in a decreased cleaning interval due to the difficulty of filter cleaning. Therefore, it is necessary that the optimum pleating geometry should be determined by employing the dimensionless parameter, a, in the design of cartridge filters.Implications: A pleated filter bag is often used to treat exhaust gas in many industrial applications due to its fairly high dust collection efficiency and relatively low pressure drop. The present paper introduces an optimum design configuration to make a pleated filter with newly developed PTFE/glass composite filter media. A dimensionless parameter that is the ratio of pleat height to pleat pitch should be considered to make the best quality pleated filter.

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Section: Resultsmentioning

confidence: 99%

“…The PTFE/glass composite filter, which consists of a PTFE film that is 0.1 mm thick and a glass mat that is 0.8 mm thick, was made by a foam coating method. This filter has excellent thermal resistance and a high filtration performance (Park et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Influence of pleat geometry on filter cleaning in PTFE/glass composite filter

Park

Lee

et al. 2012

Journal of the Air & Waste Management Association

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“…Detailed preparation of the test filter was described in an earlier article (Park et al, 2010). As shown in Fig.…”

Section: Test Filtermentioning

confidence: 99%

“…Maintaining a consistent value of residual pressure drop would indicate that the cleaning is working very well. Although the test filter was composed of two heterogeneous layers, most of the introduced particulate matters could be collected on the upper layer of PTFE rather than inside the pore channels (see the details in Park et al, 2010). Therefore, operation pressure resistance would depend mainly on the filter surface.…”

Section: Filter Cleaning By Back-flushingmentioning

confidence: 99%

Filtration Characteristics of Fine Particulate Matters in a PTFE/Glass Composite Bag Filter

Park

Kim

et al. 2012

Aerosol Air Qual. Res.

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Bag houses are often used to control particulate matters and recover valuable resources in various industries. A bag filter is the most important component in a bag house system, and thus it is important to develop the best-quality filter media and determine the optimum operating conditions of a bag house system. This study focused on particle penetrations under an operating condition of a bag house system, and investigated the relationship between dust clogging and dust penetration as a function of pressure drops across the filter medium. The results showed a minimum collection efficiency of 80% for 0.45 μm particles at the initial stage of filtration, although this quickly recovered and remained over 99.99% with a pressure drop greater than 20 mmH 2 O with a newly developed porous filter (air permeability = 5.78 × 10 −11 m 2 ). Furthermore, the recovery time depended strongly on particle size. While it was inversely proportional to the particle size at the initial stage of filtration, it showed no difference for particles larger than 0.725 μm due to its uniform dust cake as filter cleaning proceeded.

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“…While the study of composite materials has largely been dominated by a focus on dense materials [2,3], porous composite materials have recently attracted considerable attention and have been identified for promising applications as bone scaffolds in biomedicine [4][5][6][7][8][9][10]; shielding layers in electrical engineering [11,12]; shock dissipators in structural engineering [13]; and as catalysts and filters in chemical engineering [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%