Refractory burner tiles having improved emissivity and combustion apparatus employing the same

Abstract

The performance of a combustion apparatus is improved by providing a burner tile therein which includes a coating of a high-emissivity (high-E) material. Preferably, the high-E material has an emissivity of greater than about 0.80, usually between about 0.85 to about 0.98. In some embodiments, the high-E material has an emissivity of about 0.92. The coating thickness on of the high-E material on the burner tile can be between about 0.0005 to about 0.025 inch, preferably between about 0.001 to about 0.002 inch. In especially preferred embodiments, the high-E material is ceramic. A burner tile comprising a coating layer of the high-emissivity material may therefore be incorporated into a combustion apparatus so as to improve its combustion performance.

Description

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

Reference will hereinafter be made to the accompanying drawings FIGURE which is a partial cross-sectional elevational schematic view of a combustion apparatus employing the high-E coated burner tiles of the present invention.

Claims

1. A method of improving performance of a combustion apparatus comprising providing a burner tile in the combustion apparatus which includes a coating of a high-emissivity (high-E) material.

2. Method as in claim 1, wherein the high-E material has an emissivity of greater than about 0.80.

3. Method as in claim 1, wherein the high-E material has an emissivity of between about 0.85 to about 0.98.

4. Method as in claim 1, wherein the high-E material has an emissivity of about 0.92.

5. Method as in claim 1, wherein the coating has a thickness of between about 0.0005 to about 0.025 inch.

6. Method as in claim 1, wherein the coating has a thickness of between about 0.001 to about 0.002 inch.

7. Method as in claim 1, wherein the high-E material is ceramic.

8. A burner tile for a combustion apparatus comprising a coating layer of a high-emissivity material.

9. Burner tile as in claim 8, wherein the high-E material has an emissivity of greater than about 0.80.

10. Burner tile as in claim 9, wherein the high-E material has an emissivity of between about 0.85 to about 0.98.

11. Burner tile as in claim 9, wherein the high-E material has an emissivity of about 0.92.

12. Burner tile as in claim 9, wherein the coating has a thickness of between about 0.0005 to about 0.025 inch.

13. Burner tile as in claim 9, wherein the coating has a thickness of between about 0.001 to about 0.002 inch.

14. A combustion apparatus comprising a burner tile as in any one of claims 8-13.