Removable Ash Shield for SCR Catalyst Particulate Diversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for removing particulate matter from spaces around and between catalyst blocks in SCR devices are inefficient, leading to catalyst erosion and reduced NOx removal effectiveness, and require welded ash shields that complicate maintenance and installation.
Innovation Solution
A particulate diverter device comprising a wall-contacting portion, tensioning portion, and L-shaped or V-shaped anchoring elements that create a seal between catalyst blocks and the enclosure, allowing for easy installation and maintenance without welding, thereby diverting particulate matter away from catalyst blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welded ash shields are installed around catalyst blocks, then particulate matter is diverted away from catalyst blocks, but installation complexity increases and maintenance becomes difficult
Solution Approach 1:
The ash shield system is segmented into removable individual shields that can be independently installed and removed, rather than a permanent welded structure. This allows maintenance personnel to access catalyst blocks by simply removing the shields without destructive procedures.
Solution Approach 2:
The ash shields are designed to be dynamic and removable rather than static and permanent. The shields can be easily installed and removed to facilitate catalyst block maintenance, transforming the system from a fixed welded structure to a flexible removable one.
2Reliability
If welded ash shields are used, then particulate diversion is effective, but catalyst block access for cleaning and replacement is restricted
Solution Approach 1:
The shield system is divided into separate removable segments that can be easily taken off to expose catalyst blocks for cleaning and replacement, then reinstalled to restore particulate diversion functionality.
Solution Approach 2:
The ash shields are designed as temporary protective elements that are removed during maintenance operations and then recovered/reinstalled after maintenance is complete, rather than being permanent welded structures.
3Strength
If welding is used to install ash shields, then structural integrity is achieved, but risk of weld splatter damage to catalyst increases
Solution Approach 1:
The welding operation is completely extracted/removed from the installation process. Instead of welding ash shields to catalyst blocks, the shields are designed to be mechanically attached or freely positioned, eliminating the harmful weld splatter effect entirely.
Solution Approach 2:
The potential harm of weld splatter is converted into a benefit by completely avoiding welding near the catalyst. The design accepts slight reduction in shield attachment strength in exchange for eliminating catalyst damage risk, which is then compensated by proper shield positioning and material selection.
4Reliability
If ash shields are installed after catalyst blocks are in place, then particulate diversion is provided, but installation time and labor increase
Solution Approach 1:
The ash shields are designed to be pre-fabricated and ready-for-installation components that can be quickly attached to catalyst blocks without requiring complex on-site welding or customization, reducing installation time and labor requirements.
Data Source
AI summary
The present invention generally relates to devices for diverting contaminants into catalyst blocks; and in particular to devices for diverting particulate matter such as powdered and/or solid contaminants away from spaces around and between catalyst blocks.