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Flow control method and apparatus

Image Number 2 for United States Patent #8141588.

An apparatus and method for redirecting fluid flow in a plenum provides flow performance (quality), structural, and economic advantages by using an array of flat blades that is mounted at an angle with respect to the inlet (upstream) fluid flow, such that the blades are tilted with respect to that flow and correspondingly redirect the flow in a desired direction. The apparatus, also referred to as a "GSG" or "graduated straightening grid," has a range of applications, and offers a number of performance, structural, and economic advantages in large-scale applications. As a particular, but non-limiting example, one or more embodiments of the flow-redirecting apparatus taught herein are configured for use in Selective Catalytic Reduction (SCR) systems where catalytic reactors are used for scrubbing industrial flue gases.

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