Burner Tile With Density Gradient For Erosion Resistance
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Solution Overview
Problem
Existing burner tiles face challenges with high velocity fuel combustion, requiring high fire resistance, heat resistance, erosion resistance, and thermal shock resistance, while also being lightweight and easy to handle, with issues such as fiber scattering, cracking, and poor moldability in current ceramic fiber and castable material-based solutions.
Innovation Solution
A burner tile composed of a molded inorganic fiber product with a high bulk density region along the inner circumferential surface and a lower density region in the intermediate and outer regions, formed by rolling inorganic fiber blankets with different densities, and an inorganic binder, allowing for excellent erosion resistance and thermal shock resistance without the need for preheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic fiber blankets are laminated to form a burner tile, then thermal shock resistance is improved, but fiber scattering occurs under high velocity combustion conditions
Solution Approach 1:
The patent uses a composite structure combining ceramic fiber blankets with a binder material to create a stabilized burner tile that maintains thermal shock resistance while preventing fiber scattering under high velocity combustion conditions
Solution Approach 2:
The patent modifies the physical and chemical parameters of the ceramic fiber blanket by controlling bulk density, fiber orientation, and binder content to achieve both thermal shock resistance and erosion resistance simultaneously
2Reliability
If castable material is used for burner tile, then fire resistance is improved, but the material may explode due to insufficient drying
Solution Approach 1:
The patent employs a porous inorganic fiber blanket structure that allows controlled moisture evacuation during drying, preventing explosive failures while maintaining fire resistance through the inherent refractory properties of the fiber material
Solution Approach 2:
The patent replaces the traditional castable material system with an inorganic fiber blanket system that eliminates the explosion risk associated with moisture trapping while maintaining comparable fire resistance performance
3Reliability
If rammed and molded product is used, then fire resistance is improved, but high skill is required in molding
Solution Approach 1:
The patent uses a flexible inorganic fiber blanket that can be easily molded into the desired burner tile shape without requiring high-skill molding operations, while the fired product maintains excellent fire resistance
Solution Approach 2:
The patent employs a moldable inorganic fiber blanket that simplifies the molding process, reducing the need for highly skilled labor while maintaining product quality
4Ease of operation
If burner tile is made lightweight, then ease of handling is improved, but erosion resistance deteriorates
Solution Approach 1:
The patent creates a burner tile with non-uniform density distribution, where the inner layer has higher bulk density for erosion resistance and the outer layers have lower bulk density for lightweight handling, achieving both requirements simultaneously
Data Source
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AI summary
Provided is a burner tile that has good fire resistance, good heat resistance, good erosion resistance, and good thermal shock resistance. A burner tile includes a molded inorganic fiber product and has a burner main hole extending therethrough in a furnace interior-exterior direction. The burner tile comprises: high bulk density part that extends along an inner circumferential surface of the main hole and has a higher bulk density than intermediate part located between the inner circumferential surface and an outer surface of the burner tile. The burner tile includes outer part formed by rolling a plurality of superposed inorganic fiber blankets having different bulk densities.