Air suction and filtering systems wood industry

Wood

How to choose the best suction and filtering system for wood

For an adequate technical/economic design, it is necessary to know the specific type of the processing and the relative production cycle, the type and model of machines to be aspirated and the relative waste to be produced. Assessing the correct delivery, the particle size, the percentage of dusts or moisture we are going to design, according to the territorial location, the best solution for the aspiration, filtration, disposal or recycling

For the design of the plant, it is necessary to konw: - The required air flow for each machine. The value is normally supplied by the manufacturers of the machines; - Failing that, the section of the suction outlets on each machine; - The maximum symultaneity of working of the machines;

The table below can be of help for the calculation of the air transport speed in circular ducts, in function of "concentration and specific weight", dependent on the type of material aspirated (and eventually on the moisture)

SPEED M/S CONCENTRATION SPECIFIC WEIGHT KM/M3
20 23 600 750 100 140
23 26 750 900 140 180
26 30 900 1100 180 240
30 35 1100 1350 240 320
ATEX: Are considered potentially explosive, the wood dusts with particle size less than 500 micron and concentration (LEL) of 30 gr/m
ATEX ZONE CLASSIFICATION
20 CONTINUOUS PRESENCE
21 POSSIBLE PRESENCE DURING THE NORMAL WORKING HOURS OF THE PLANT
22 NO PRESENCE OR JUST SHORT PERIODS PRESENCE

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  • 16 novembre 2016

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