Sealed Catalyst Unit Replacement for Continuous Reactor Operation
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Solution Overview
Problem
Existing catalyst replacement in reactors requires plant shutdown, leading to increased operational and investment costs, safety hazards, and system pressure fluctuations due to gas leakage during maintenance.
Innovation Solution
A reactor design with a sealing housing and movable cover and sealing elements allows catalyst units to be replaced during operation, preventing gas leakage and maintaining system integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the plant is shut down for catalyst replacement, then the catalyst can be replaced, but the plant throughput is reduced and operational costs increase
Solution Approach 1:
The catalyst system is divided into multiple independent catalyst units that can be replaced individually. Each catalyst unit is a self-contained module with catalyst modules arranged in a grid-like metal frame, allowing one unit to be replaced while others remain in operation to maintain plant throughput
Solution Approach 2:
The reactor design incorporates movable cover elements and sealing mechanisms that enable dynamic access to catalyst units during operation. The first and second movable cover elements can be opened to remove a catalyst unit while the reactor remains operational, and the sealing elements maintain system integrity throughout the replacement process
2Productivity
If the reactor casing is opened during operation for catalyst replacement, then catalyst replacement during operation becomes possible, but exhaust gas escapes and system pressure fluctuates
Solution Approach 1:
Sealing elements are positioned in advance at strategic locations within the reactor casing before catalyst replacement begins. These pre-positioned sealing elements automatically engage with the movable cover elements to create sealed compartments, preventing exhaust gas leakage before the actual catalyst removal occurs
Solution Approach 2:
Sealing elements act as intermediaries between the open reactor casing and the catalyst unit being replaced. These elements create temporary sealed barriers that allow the catalyst unit to be removed while preventing exhaust gas from escaping into the environment, thus mediating between the need for access and the need for containment
3Duration of action of stationary object
If a larger quantity of catalyst is installed to extend maintenance cycles, then the maintenance cycle is extended, but the pressure drop across the exhaust gas cleaning unit increases
Solution Approach 1:
The total catalyst quantity is segmented into multiple catalyst units distributed throughout the reactor. This segmentation allows the system to maintain a large total catalyst volume for extended maintenance cycles while distributing the pressure drop across multiple smaller units rather than one large unit, reducing the overall pressure drop across the exhaust gas cleaning unit
Data Source
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AI summary
The invention relates to a reactor, in particular a reactor for cleaning exhaust gases. The reactor has several housing openings leading into a housing shaft, the housing shafts being equipped with catalyst units. Each housing shaft of the reactor has a sealing housing which, by means of a suitable arrangement of sealing elements and cover elements, allows the catalyst units to be replaced during operation of the reactor without any air exchange between the reactor's external environment and the respective housing shaft.