VERFAHREN UND VORRICHTUNG ZUR RUECKGEWINNUNG VON UEBERSCHUESSIGEM PULVER AUS PULVERBESCHICHTUNGSKABINEN

摘要

The invention relates to a process and device for the recovery of excess powder from powder coating booths (10). The excess powder is sucked out of the booths via cyclones (14) by means of ventilators, an acceleration section (16) being provided between the respective booths (10) and the cyclones (14), in which section the powder is accelerated so that it flows into the cyclones (14) at a sufficiently high flow speed, as a result of which the degree of precipitation efficiency is raised. The acceleration section can have a sieve (24) connected in front of it in order to sieve the powder and separate out foreign bodies and particles of dirt at an early stage. The cyclones (14) can be operated alternately so that one cyclone (14) is emptied whilst the other carries on running and vice versa without the operation of the powder coating booth (10) having to be interrupted. On the floor (34) of the booth a narrow-mesh web (36) is installed at an angle, to which air is fed from below, as a result of which powder which drops in the booth (10) and falls to the floor, is loosened up and carried out at the foot end of the booth. In order to remove very fine dust from the exhaust air, a tape filter is connected downstream of the ventilator, from which tape filter the powder deposited on it can be sucked off by means of a vacuum cleaner.