GB1469712A - Washing gas - Google Patents

Abstract

1469712 Washing gases AIR-INDUSTRIE 18 March 1974 [20 March 1973] 12003/74 Heading B1R An installation for washing a polluted gas from for example a paint spray booth 1 comprises a vertically-orientated trickling channel 3 whose cross-section decreases in a downward direction and down which the gas to be cleaned flows, washing liquid distributing devices 6 for trickling washing liquid down the inner walls of channel 3 so that it leaves the lower end thereof in a continuous sheet and a wall 7 arranged transverse to the gas flow and having a perimeter equal or substantially equal to the perimeter of the lower end of the channel 3. The surface of wall 7 may be convex or cuspoid or the wall itself may be adjustable by being formed of (a) two flaps 7a, 7b (Fig. 3, not shown) which are adjustable by jacks or (b) a deformable wall 15 (Figure 5) fixed in a sealed manner on support 16 so as to define a sealed space 17 into which fluid may be passed from pressure source 19 to alter the volume of 17. Wall 7 may be moved relative to 3 in the Fig. 1 embodiment by threaded rods 12. A protuberance 8 is fitted to the upper side of wall 7. In a further embodiment (Figure 8), the lower end of 3 has a complementary wall 23, with a lower part 24 forming a separation slot 25 with the perimeter of channel 3, and a retaining wall 28, so forming a reserve volume 27 communicating with a zone under suction from fan 5 with respect to the lower end of channel 3. In yet a further embodiment (Figure 6), the transverse wall is provided by blocks of concrete resting on the bottom of the receiver basin 9.