Metallurgical Vessel Cooling Panels Segmented for Quick Relining
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Solution Overview
Problem
Metallurgical vessels used in the HIsmelt process face challenges due to continuous operation as pressure vessels at high temperatures, requiring long-term sealing and quick relining, with limited access for internal water cooling panel replacement without compromising the integrity of the outer shell.
Innovation Solution
The metallurgical vessel features a series of cooling panels with lateral projections and tubular connections to the outer shell, allowing for coolant flow and refractory lining, enabling individual panel replacement without disrupting the pressure vessel integrity, using elongate arcuate panels with zigzag formations and pin connections for secure mounting and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling panels are internally mounted in the vessel shell, then cooling efficiency is improved, but accessibility for panel replacement deteriorates
Solution Approach 1:
The cooling system is divided into multiple separate cooling panels that can be individually removed and replaced. Each panel is a discrete component with projection elements that engage with the shell interior, allowing selective maintenance of individual panels without affecting the entire cooling system or requiring vessel shutdown for extended periods.
2Productivity
If the vessel operates continuously as a pressure vessel, then productivity is improved, but the complexity of maintaining sealing integrity deteriorates
Solution Approach 1:
Projection elements are pre-formed on the cooling panels during manufacturing, and corresponding receptacles are pre-formed in the shell interior. This preliminary preparation of mating features ensures that when panels are removed and reinstalled during maintenance, the sealing interfaces are already properly positioned and shaped, simplifying the reassembly process and maintaining pressure vessel integrity without requiring complex sealing procedures.
3Reliability
If cooling panels are made robust for high-temperature pressure vessel operation, then reliability is improved, but ease of panel removal and replacement deteriorates
Solution Approach 1:
The robust cooling panels are segmented into discrete removable units with projection elements that provide mechanical engagement with the shell interior receptacles. This segmentation allows the panels to be designed with sufficient structural integrity for high-temperature pressure service while enabling individual panel removal through the projection-receptacle interface, facilitating maintenance without requiring complete system disassembly.
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 design ensures continuous operation and efficient cooling of refractory materials, allowing for extended vessel life and quick relining without compromising the pressure vessel's integrity, reducing refractory erosion and enabling prolonged operation without significant downtime.
Implementation Method 1
each panel having internal passages for flow of coolant therethrough
Implementation Method 2
coolant flow and refractory lining, enabling individual panel replacement
Data Source
AI summary
Cooling panels (31) are attached to the shell (11) of a metallurgical vessel to form an internal lining of the shell. Each panel (31) comprises a coolant flow tube (36) bent to form inner and outer panel sections (37, 38) of zig-zag formation. Panel mounting pins (43) connected to the outer panel section (38) by connector straps project laterally outwardly from the panel through openings (45) in the shell and tubular shell protrusions (46) surrounding the openings (45). The ends of pins (43) are connected to the outer ends of protrusions (46) by welding metal discs (47) thus forming connections exteriorly of the shell in a way which seals the openings (45). Coolant inlet and outlet connectors (42) for the panel project outwardly through openings (48) in the shell and surrounding tubular protrusions (49) and connections are made by welding discs (51) between the connectors (42) and protrusions (49).