Liquid-Cooled Cantilever Shelf for Refractory Furnace Walls
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Solution Overview
Problem
Refractory brick walls in vertically oriented furnaces face severe wear, corrosion, and weight-bearing issues, leading to potential catastrophic failures due to the conventional practice of directing the entire weight of the brick wall lining down to its ring footing, which results in uneven wear and increased risk of collapse.
Innovation Solution
The implementation of modular liquid-cooled cantilever support shelves made of copper, which are fixed to the horizontal web-rings of steel containment shells, redistribute the weight of the upper refractory brick tiers onto the steel containment shell, relieving the lower portion of the brick wall and allowing for controlled thermal expansion and wear without sudden collapse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the entire weight of the refractory brick wall lining is directed vertically down to the ring footing, then the structural support is simplified, but the lower refractory bricks experience excessive wear and increased risk of catastrophic failure
Solution Approach 1:
The invention divides the continuous refractory brick wall into separate tiers by introducing horizontal cantilever shelves at intermediate levels. Each shelf supports the weight of the brick tier above it, transferring the load to the steel containment shell rather than passing it through the lower bricks. This segmentation eliminates the cumulative weight burden on lower bricks, preventing catastrophic failure while maintaining structural integrity.
2Device complexity
If conventional brick wall construction is used without intermediate support, then the device complexity is low, but the campaign life is limited due to wear and corrosion of lower bricks
Solution Approach 1:
By segmenting the brick wall into tiers supported by intermediate cantilever shelves, the invention allows each tier to be maintained independently. The lower bricks are relieved of weight stress and can corrode or wear beyond conventional limits without compromising overall structural stability, thereby extending the furnace campaign life and enabling targeted maintenance of worn sections.
3Reliability
If liquid-cooled cantilever shelves are added to support upper brick tiers, then the reliability and campaign life are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention introduces liquid-cooled cantilever shelves as intermediary support structures between the upper and lower brick tiers. These shelves serve as mediators that bear the weight of upper tiers and transfer it directly to the steel containment shell, protecting the lower bricks from excessive load. The liquid cooling system prevents the shelves from overheating, ensuring their structural integrity in the high-temperature furnace environment.
Solution Approach 2:
The cantilever shelves are constructed using composite design, combining refractory brick or castable material for thermal resistance with embedded cooling channels for thermal management. This composite structure allows the shelves to withstand both mechanical loads and high temperatures, resolving the contradiction between added complexity and improved reliability.
4Duration of action of stationary object
If the lower refractory bricks are allowed to corrode and thin beyond conventional limits, then the campaign life is extended, but the risk of sudden collapse increases without intermediate support
Solution Approach 1:
The invention segments the load-bearing function from the lower bricks by introducing intermediate cantilever shelves. This allows the lower bricks to be permitted to corrode and thin beyond conventional limits without creating a collapse risk, as the shelves carry the structural load. The segmentation creates a safety buffer that decouples brick thickness from structural integrity.
Solution Approach 2:
The cantilever shelves act as a preemptive cushioning structure that prevents catastrophic failure before it can occur. By providing intermediate support, the shelves create a safety margin that allows the lower bricks to deteriorate without immediately compromising structural safety, enabling extended operation with monitored degradation.
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 solution reduces the risk of sudden brick lining wall collapse, extends the campaign life of the furnace by allowing the lower brick to corrode and thin beyond conventional limits without failing, and enables targeted maintenance and rebuilding of worn parts without replacing the entire brick structure.
Implementation Method 1
modular liquid-cooled cantilever support shelves made of copper
Implementation Method 2
liquid-cooled cantilever support shelves
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
At least one row of fixed copper coolers are arranged in a furnace in a cantilevered horizontal shelf inside and fastened to an external steel ring support and the steel containment shell. These shelves redirect and take all the weight of refractory brick and floating cooling blocks that are stacked on above. Each fixed copper cooler in the shelves cantilever shoulder-to-shoulder over any refractory brick and floating cooling blocks that may be stacked beneath to relieve that lower portion of the wall from the weight of the upper wall. When relieved of such weight, the risks of sudden catastrophic failure of the lower walls is reduced. These bricks in the lower walls can also be allowed to wear and thin beyond what would be reasonable in a conventional design without any cantilevered shelving