Filter assembly to separate solids from gas flow, especially at laser cutting and welding machines, wets retained solids and/or filter with water to prevent fires or explosions

摘要

To separate solid dust and metal particles (34) from a gas flow (18), it passes through a fine filter (20). The fine filter and/or the retained solid deposit is wetted with a non-flammable liquid continuously and/or in cycles. The liquid, of or containing water, is in the form of finest droplets, aerosols, mist or vapor. The wetting unit (70) has a jet (40) where the gas channel (14) enters the filter housing (12). The wetting unit is connected to a sensor (76) to measure the temperature of the clean gas, the moisture content (78) of the clean gas, and the filter resistance (80).