Theoretical Foundations of The Aerodynamics of An Improved Bag Filter Device Utilising Composite Filter Fabric

This article examines the theoretical justification of the aerodynamic resistance of an advanced bag filter apparatus. The total pressure loss within the device is interpreted as the summation of losses occurring during the intake of the dust-laden gas stream, its longitudinal axial movement within the filter sleeve, the radial filtration process through the composite filter medium, and local resistances encountered within the housing and the purified gas discharge zones. The microstructural characteristics of the filter fabric, based on a combination of polyester, glass fibre, and basalt fibre—including parameters such as thickness, specific contact surface area, the fraction of open zones, and the degree of dust cake formation—are considered the primary determining factors of the radial resistance coefficient. Consequently, an analytical approach is proposed that enables the evaluation of the total aerodynamic resistance while accounting for the actual microstructural state of the composite filter fabric.

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