Patent ID: 8413967

Claim:
A wet scrubber tray for a counter-current liquid gas contact device having walls defining an upright housing with a gas inlet and having means for passing gas upwardly therethrough, comprising: a perforated bottom plate provided with substantially symmetrically spaced relatively large openings to form an open area therethrough; equal height side stiffeners extending from first opposing edges of the perforated bottom plate and oriented substantially perpendicularly with respect thereto; and one or more intermediate stiffeners in between the side stiffeners and connected thereto and to the bottom plate, the stiffeners serving to increase the stiffness to mass ratio of the tray which increases the tray's natural frequency in order to decrease the tray's susceptibility to vibration-induced cracking; wherein each intermediate stiffener is L-shaped and has a long leg and a short leg, and has a plurality of tabs extending from a bottom edge of the long leg, each tab being aligned with a corresponding slot in the bottom plate.