In this diploma work we studied the properties of gas and fume discharges at flame cutting, plasma cutting and MIG/MAG welding, and their influence on human health. We have defined the most widely used principles of air filtration and described them. We concluded that the best air filtration device is air filtration machine with cartridge filter. It offers the best air filtration in all of mentioned working procedures. Within this diploma work, we calculated the necessary airflow, pressure drop, necesssary power of fan and designed the basic construction of mobile air filtration device with simple water prefilter and cartridge main filter.
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