Burner tiles

There are two primary shapes for fhe ouflef nozzle of industrial burners round or rectangular. Figure 1.41 shows identical heaters with the same number of burners, but with different burner shapes round flame and flat flame. Round flames are fhe predominant shape used in industry. Most of the burners discussed in this book are predominantly round. This is often due to the lower cost of making round shapes compared to making rectangular shapes. It is also often due to the burner tile where round shapes generally require less maintenance... 

The reaction takes place within sight of both the product and the furnace refractories, both of which absorb some reaction heat (unlike a burner tile of quarl)... 

A technology often used delays the burning so that most of it occurs out in the furnace rather than inside the burner tile (or quarl), then it is possible to inspirate inert furnace gases into the combustion air and/or fuel being supplied to the combustion reaction. 

Case 2 Roofs, Walls, Burner Tiles If combustion gases are directed toward or across these surfaces, they become more porous, lose strength, slump, and even melt. Very dense refractories should be used at least near the surfaces exposed to gases hotter than zone temperature. Generally, a higher percentage of alumina makes a refractory more dense, and therefore less subject to the above problems. Strict attention to refractory installation instructions will minimize these problems. For burner tile installation, refer to the Appendix. 

Another excellent application for anchors and hangers is in on-site rammed or cast refractory burner tiles for cases where the burner manufacturer does not provide a kiln-fired burner tile. These are usually for large burners. Figure 9.9 is a typical drawing provided by a burner manufacturer, with detailed dimensions and angles that... 

Silicon-nitride rotors, blades, rings, and burner tiles for gas turbines... 

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