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When a fabric filter is continuously operated for a long period, its pressure loss parameters vary with time, because of plugging in fabric interstices and fatigue of the fabric structure. Analysis of the variation of the pressure loss parameters is important for the design and operation of a fabric filter.In this paper, the variation with time of the pressure loss parameters is calculated from field data of three kinds of multicompartment fabric filters by use of our new analytical method. The pressure loss parameter "A" of the fabric and residual dust layer increases rapidly during the first few months after start-up, and then gradually. levels off. Another pressure loss parameter "B" of the secondary dust layer remains nearly constant since the beginning of operation. The product of the parameter "B" and the inlet dust concentration "c" is numerically obtained by the method mentioned above, and therefore the variation of the product "Bc" indicates the variation of the inlet dust concentration "c" at least for a relatively short period.
粉体工学会の論文