| 摘要 |
PURPOSE:To contrive an improvement of a combustion state and combustion efficiency, by providing a supply pipe for air enriched with O2 along a specific side part of either a fuel injection pipe or a primary air ijection pipe. CONSTITUTION:A fuel injection pipe 12 is provided at the axis part of rotary kiln 11, and mixture of pulverized coal with air for transference is supplied to a fuel injection pipe by a fuel supply pipe 13, primary air is supplied by a primary air supply pipe 14, both of them are injected from the tip of the fuel injection pipe 12, and secondary air is supplied by a secondary air supply pipe 15 through a clinker box 16. Although air enriched with O2 is supplied by a supply pipe 17 for air enriched with O2, the supply pipe 17 is provided along a specific side part of the fuel injection pipe 12. With this, combustion exhaust gas quantity can be reduced, and then thermal efficiency can be improved. |
