Cylindrical NOx Removal Device with Segmented Catalyst Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional NOx removal devices for diesel engines face challenges in ease of assembly and durability due to the need for large cutters and reduced durability from engine vibrations, especially in marine diesel engines.
Innovation Solution
The NOx removal device features a cylindrical container body divided into imaginary sections with catalyst units having rectangular, triangular, or trapezoidal cross-sections, with notches for gas flow and cushioning materials, eliminating the need for cutters and enhancing assembly and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a large cutter is used to divide the catalyst element, then the catalyst element can be divided into sectors for insertion into the cylindrical container, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The catalyst element is divided into multiple sectors along radial lines, allowing each sector to be independently inserted into the cylindrical container. This segmentation enables easier assembly without requiring a large cutter, as each smaller sector can be handled and positioned separately within the container body.
Solution Approach 2:
The catalyst element is wrapped cylindrically around a mandrel to form a three-dimensional cylindrical structure, then divided radially. This dimensional approach allows the catalyst to be formed in situ within the container geometry, eliminating the need for complex external cutting operations and large cutters.
2Ease of operation
If the catalyst element is divided into multiple sectors for assembly, then the catalyst can be inserted into the cylindrical container, but the durability to withstand engine vibrations is reduced
Solution Approach 1:
Multiple catalyst sectors are combined within the cylindrical container to form a complete catalytic structure. The sectors are positioned adjacent to each other radially, creating a unified catalyst assembly that maintains structural integrity and durability while still allowing for easier assembly compared to handling a single large catalyst piece.
Solution Approach 2:
The cylindrical container provides localized structural support and containment for each catalyst sector. This local containment structure protects the individual sectors while maintaining overall catalyst integrity, enhancing durability against vibrations while preserving assembly advantages.
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
This configuration simplifies assembly, prevents catalyst element displacement, and ensures durability even in vibrating marine diesel engine environments, eliminating the need for cutters and improving reaction efficiency.
Implementation Method 1
contains NOx removal catalyst elements
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A container body 11 contains a plurality of catalyst units 12, each including catalyst elements 22 and a housing frame body 21 that contains the elements and is square in cross section. In the cross section of the container body, a horizontally and vertically symmetric imaginary octagon S is assumed to be inscribed in the container body, and the imaginary octagon is assumed to contain a plurality of imaginary rectangular sections and a plurality of imaginary triangular sections between the imaginary rectangular sections and the outline of the imaginary octagon, and the housing frame bodies for the catalyst elements are formed with cross sections coinciding with the sections.