Flat Blade Array for SCR Flow Redirection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid flow redirection technologies in SCR systems face challenges in achieving uniform flow conditions across the catalyst layer, leading to flow disturbances and uneven catalyst depletion, often requiring costly and complex solutions like turning vanes and straightening grids.
Innovation Solution
A transverse array of flat blades mounted at an angle within the plenum redirects fluid flow, providing a cost-effective and structurally advantageous solution by simulating optimal blade height, spacing, and angle configurations to achieve desired flow quality without the need for supplemental downstream conditioning devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If turning vanes are used for flow redirection, then flow quality is improved, but device complexity and cost increase
Solution Approach 1:
The flow redirection function is segmented into multiple discrete flat blades arranged in an array, rather than using a single complex turning vane structure. Each blade independently contributes to flow redirection, allowing the system to achieve high flow quality through distributed simple elements rather than concentrated complex geometry
Solution Approach 2:
The invention changes the geometric parameters of the redirection elements from curved aerodynamic shapes (turning vanes) to flat planar surfaces (blades). By optimizing parameters such as blade spacing, blade angle, and array configuration, the system achieves effective flow redirection and conditioning without requiring complex curved geometries
2Manufacturing precision
If turning vanes are used for flow redirection, then flow quality is improved, but installation and maintenance cost increase
Solution Approach 1:
The invention replaces expensive, complex turning vane assemblies with inexpensive flat blades that can be manufactured from standard materials. The simple geometry of flat blades makes them cheaper to manufacture, install, and replace, while still achieving the required flow conditioning function
Solution Approach 2:
Instead of using complex curved surfaces to redirect flow, the invention inverts the approach by using flat surfaces arranged in an array. This inverted geometry simplifies manufacturing and installation while maintaining flow redirection effectiveness
3Stability of the object's composition
If straightening grids are placed downstream, then flow uniformity is improved, but device complexity and space requirements increase
Solution Approach 1:
The invention merges the flow redirection function with the flow straightening function into a single integrated array structure. The flat blades simultaneously perform both redirection and conditioning, eliminating the need for separate downstream straightening grids and reducing overall device complexity
Solution Approach 2:
The flat blade array is designed to perform multiple functions: flow redirection and flow straightening/conditioning. This multi-functional design eliminates the need for separate dedicated straightening devices, reducing space requirements and simplifying the overall system configuration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves high downstream flow quality and reduces installation complexity and costs by ensuring uniform flow redirection, enhancing the performance of SCR systems while maintaining mechanical and economic considerations.
Implementation Method 1
a transverse array of flat blades positioned at an angle oblique to the first flow direction to redirect the fluid flow from the first flow direction to the second flow direction
Implementation Method 2
A common straightening grid configuration involves placing a grid of parallel or crisscrossing blades edgewise in the redirected flow, to smooth the flow passing through the grid
Data Source
AI summary
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.