For the design of filtering separators, a wide variety of information is required for the dimensioning, design, mode of operation and choice of materials:
The basis for the design of filtering separators is knowledge of the volume flow to be cleaned. This is either process-related or dependent on the conditions of the extraction (e.g. dust protection at the workplace).
Important influencing factors are:
A starting point for determining air quantities is the so-called acquisition speed at open surfaces, inlet openings, hoods and machine cladding
Q [ m 3 /min ] = F [ m 2 ] xv [ m/s ] x 60
As a first approximation, the size of the required filter can be determined using the following equation:
Q = volume flow of the permeated gas
A = extension filter area
f = specific filter surface load
An essential parameter of the filtering separator is the filter surface load. The filter surface load is generally between 0.5 m 3 /(m 2 min) and 2.5 m 3 /(m 2 min), but in individual cases it can also be significantly higher. Usual pressure differences are in the range of 400 Pa to 1,500 Pa. These areas are determined by the aspects:
Properties of the particles to be separated (e.g. particle size distribution, agglomeration behavior):
Typical filter surface loads for filtration separators with pressure surge cleaning
The specific filter surface load influences the effectiveness and the degree of separation of the dust extractor.