초록 ▼

A process and apparatus for burning fuel includes supplying fuel and primary air to the upstream end portion of a longitudinally extending precombustion chamber having a longitudinally extending outer wall. Fuel and primary air are flowed in a longitudinal downstream direction through the precombust

A process and apparatus for burning fuel includes supplying fuel and primary air to the upstream end portion of a longitudinally extending precombustion chamber having a longitudinally extending outer wall. Fuel and primary air are flowed in a longitudinal downstream direction through the precombustion chamber while self-sustained combustion is maintained in the precombustion chamber by partially precombusting, mixing and heating the mixture of fuel and primary air. The uncombusted fuel and combustion products are flowed through a primary nozzle at the downstream end of the precombustion chamber. Secondary air is flowed longitudinally in a downstream direction through a longitudinally extending secondary air chamber having a longitudinally extending outer wall surrounding the outer wall of the precombustion chamber. The longitudinally flowing secondary air is heated while it cools the outer wall of precombustion chamber. The secondary air is mixed with the uncombusted fuel and combustion products exiting the primary nozzle. The secondary air, uncombusted fuel and combustion products are flowed through a secondary nozzle at the downstream end of the secondary air chamber. The mixture of secondary and uncombusted fuel are combusted.

대표청구항 ▼

A jet burner comprising: longitudinally extending precombustion chamber means for longitudinally flowing, partially precombusting, mixing and heating fuel and primary air to maintain self-sustained combustion, the precombustion chamber means including a longitudinally extending thermally conductive

A jet burner comprising: longitudinally extending precombustion chamber means for longitudinally flowing, partially precombusting, mixing and heating fuel and primary air to maintain self-sustained combustion, the precombustion chamber means including a longitudinally extending thermally conductive outer wall, an upstream end portion and a downstream end portion, the upstream end portion including means for porting primary air into the precombustion chamber means and means for porting fuel into the precombustion chamber means, the downstream end portion including means for porting uncombusted fuel and combustion products out of the precombustion chamber means; primary nozzle means at the downstream end portion of the precombustion chamber means for directing the flow of uncombusted fuel and combustion products exiting from the downstream end portion of the precombustion chamber means, said primary nozzle means being formed by the downstream end portion of the outer wall of the precombustion chamber and being a convergent-divergent shaped jet nozzle; longitudinally extending secondary air chamber means surrounding the outer wall of the precombustion chamber means for flowing secondary air longitudinally along the outer wall of the precombustion chamber means and for receiving a transfer of heat from the precombustion chamber means to cool the outer wall of the precombustion chamber and heat secondary air within the secondary air chamber, the secondary air chamber means including a longitudinally extending outer wall, an upstream end portion and a downstream end portion, the upstream end portion including means for porting secondary air into the secondary air chamber means, the downstream end portion including means for porting secondary air out of the secondary air chamber means proximate to the primary nozzle means, for mixing the secondary air with the uncombusted fuel and combustion products exiting from the primary nozzle means and for combusting the mixture of secondary air and uncombusted fuel; and secondary nozzle means at the downstream end portion of the secondary air chamber means for directing the flow of secondary air, uncombusted fuel and combustion products exiting from the secondary air chamber means and the primary nozzle means.