Catalytic Converter Shell Extension for Capacity Revamping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing catalytic converters face challenges in increasing capacity without replacing the entire unit, as the existing cartridge has limited spare volume for additional catalyst, making cost-effective revamping difficult.
Innovation Solution
An additional shell is installed on the pressure vessel's flange to extend it axially, creating more room for catalyst, allowing for the addition of new catalyst beds and modified inter-bed cooling systems within the same vessel, maintaining the original shell and minimizing costly replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional catalyst is added to increase converter capacity, then productivity increases, but the existing cartridge has limited spare volume making the addition difficult
Solution Approach 1:
The patent extends the pressure vessel in the axial direction by adding a shell extension, utilizing the unused axial dimension to accommodate additional catalyst volume. This dimensional extension provides the necessary space for increased catalyst capacity without requiring radial expansion or complete vessel replacement.
2Productivity
If the entire converter is replaced to increase capacity, then productivity increases, but the cost increases significantly
Solution Approach 1:
The patent divides the pressure vessel into segments: the original vessel is retained and an additional shell extension is added. This segmentation allows the existing functional components to be preserved while only adding the necessary extension, significantly reducing revamping costs compared to complete replacement.
Solution Approach 2:
The patent designs the shell extension with pre-integrated support structures, distributors, and collectors that are prepared in advance for installation. This preliminary preparation of components facilitates easier and more cost-effective integration into the existing vessel during the revamping process.
3Quantity of substance
If the pressure vessel is extended axially to accommodate more catalyst, then catalyst volume increases, but the structural complexity increases
Solution Approach 1:
The patent merges the original pressure vessel with the shell extension to form an integrated axial extension structure. The support structures, distributors, and collectors are designed to connect seamlessly between the original and extended portions, creating a unified system that accommodates additional catalyst while maintaining structural coherence.
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 method allows for a cost-effective increase in catalyst volume and capacity without replacing the pressure vessel, enabling the addition of new catalyst beds and modified cooling systems, thus enhancing the converter's output while minimizing operational disruptions and costs.
Implementation Method 1
An inter-bed heat exchanger transfers heat from the effluent of a catalyst bed to a cooling medium by indirect (i.e. without mixing) heat exchange
Implementation Method 2
Use of a fresh gas charge as a cooling medium allows preheating the gas charge with heat removed from the effluent
Data Source
AI summary
A method for revamping a catalytic converter wherein: said catalytic converter comprises a pressure vessel and a catalytic cartridge containing at least one catalyst bed, the pressure vessel includes a cylindrical shell with a full aperture and includes a removable cover of said aperture, and the catalytic cartridge is removable through said upper aperture, and the method includes: installing an additional shell over the aperture of the original shell, thus obtaining an axially extended shell of the pressure vessel; providing an axially extended catalytic cartridge having an axially extended room for holding catalyst in the so obtained axially extended shell.