Wet scrubber tray

Abstract

An improved wet scrubber tray provides increased resistance to vibration-induced cracking. The tray is self supporting to eliminate wastage of raw material, and additional internal stiffeners added to the tray make multiple intermediate stiffeners. The connection of the intermediate stiffeners to th e perforated bottom plate is changed to eliminate the shop weld in the bottom plate. The holes in the perforated bottom plate are repositioned so that the y are moved away from the boundaries of the tray to reduce their influence on boundary conditions. The thickness of the tray material may be increased to lower the vibratory stresses. The mechanism for holding the trays themselves within the spray absorber tower is changed so that the trays are now held do wn by plate material that is attached to the support grid, but not to the trays . Three field welds are applied to the sides of each tray to hold the trays in place relative to each other and are strategically placed to allow adjacent side stiffeners to act together as a composite section, thus increasing their strength. Elastomeric material such as neoprene is used at the tray-to-grid attachments to increas e the damping of the system. Formed features in the trays such as single or multip le ribs, bosses, domes or dimples may also be provided to increase tray stiffne ss or influence wet scrubber performance.

Description

Technical field [0001] This application relates to methods and equipment for obtaining gas-liquid countercurrent contact, such as a wet scrubber, which involves contacting a slurry or solution containing an active material as a chemical reaction absorption medium with a flue gas containing sulfur oxides. More particularly, this application relates to an improved tray structure and gas-liquid contact equipment of the structure. Background technique [0002] Used to remove sulfur oxides (SO) from flue gas produced by the combustion of fossil fuels x ) The wet scrubbing gas-liquid contact system is known. See, for example, U.S. Patent No. 4,263,021 by Downs et al., the content of which is therefore fully incorporated herein by reference. Steam / its generation and use, 41st edition, Kitto and Stultz, Eds., Copyright 2005, The Babcock & Wilcox Company, where Chapter 35 provides a method for removing SO x For additional details of the wet scrubber system, its content is therefore full...

AI Technical Summary

Problems solved by technology

Such a situation affects the state of the supported boundary of the porous bottom slab in such a way that cascading failures occur

Such a chain reaction compromises the integrity of the perforated bottom plate, resulting in a large portion of the perforated bottom plate falling off, reducing tray utilization efficiency and creating the potential for debris to be sucked into the slurry recirculation pump

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