Denitration Catalyst Structure with Interlocking Convex Strips
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Solution Overview
Problem
Prior denitration catalyst units experience increased pressure loss and decreased denitration ratios due to bending of platy catalyst elements during operation, which narrows the flow path and affects efficiency.
Innovation Solution
A denitration catalyst unit comprising platy catalyst elements with edges aligned on the gas-inflow and gas-outflow sides, featuring alternating flat and concavo-convex parts with convex strips obliquely disposed at angles between 50° and 85°, ensuring intersection points within a specific range to maintain flow path uniformity and prevent bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If platy catalyst elements are used in conventional denitration catalyst units, then denitration efficiency can be achieved, but pressure loss increases and denitration ratio decreases due to bending of catalyst elements during operation
Solution Approach 1:
The patent applies preliminary action by pre-forming concavo-convex parts on the catalyst elements and arranging them in advance to prevent bending during operation. The convex parts are positioned to interlock with adjacent elements, creating a rigid framework before thermal stress occurs, thus preventing flow path narrowing and maintaining pressure loss levels.
Solution Approach 2:
The patent uses curvature by introducing concavo-convex parts with specific curved geometries on the catalyst elements. These curved surfaces allow for flexible interlocking arrangements that maintain structural integrity while accommodating thermal expansion, preventing the elements from bending and maintaining consistent flow paths.
2Productivity
If platy catalyst elements are stacked in conventional arrangements, then catalytic activity is provided, but flow path uniformity deteriorates due to edge bending during operation
Solution Approach 1:
The patent applies preliminary action by pre-forming concavo-convex parts on the catalyst elements and arranging them in advance to prevent bending during operation. The convex parts are positioned to interlock with adjacent elements, creating a rigid framework before thermal stress occurs, thus preventing flow path narrowing and maintaining pressure loss levels.
Solution Approach 2:
The patent applies local quality by creating concavo-convex parts only at specific locations on the catalyst elements rather than uniformly across the entire surface. The convex parts are strategically positioned at edges and corners where bending is most likely to occur, providing localized reinforcement where needed while maintaining overall catalytic activity.
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 a high denitration ratio with low pressure loss, reducing initial running costs by maintaining flow path integrity and enhancing catalytic performance.
Implementation Method 1
In the presence of a denitration catalyst, nitrogen oxides contained in gas discharged from fireplaces of a boiler in thermal power plants or various factories, or fireplaces of garbage incinerators are decomposed to purify the discharged gas
Data Source
AI summary
Denitration catalyst unit, comprising two or more platy catalyst elements, wherein the platy catalyst element has an edge located on gas-inflow side, an edge located on gas-outflow side and edges located on either side of the platy catalyst element, the platy catalyst elements are piled so as to align the edges located on gas-inflow side and the edges located on either side of the platy catalyst elements respectively, each of the platy catalyst elements alternately has more than one flat part in the shape of a flat plate and more than one concavo-convex part in the shape of platy convex strips on the upper and lower surfaces, the platy convex strips are parallel to one another and are obliquely disposed at an angle θ of not less than 50° and not more than 85° to an extending direction of the edge located on gas-inflow side of the platy catalyst element so that a ridge of the platy convex strip on the upper surface of one of the platy catalyst elements intersects with a ridge of the platy convex strip on the lower surface of another of the platy catalyst elements adjacent, at least one of the intersection points is within a range x of more than 0 mm and less than 25 mm inward from the edge located on gas-inflow side of the platy catalyst element.