The invention discloses an opposed-injection aluminum melting furnace uniform combustion system which comprises: a furnace body, a first heat storage unit, a second heat storage unit, and four fuel injection guns disposed diagonally on two end walls of the furnace body comprising a first fuel injection gun located on the first end wall of the furnace body adjacent to the second heat storage unit, a second fuel injection gun located on the second end wall of the furnace body adjacent to the first heat storage unit, a third fuel injection gun on the second end wall of the furnace body adjacent to the second heat storage unit, and a fourth fuel injection gun located on the first end wall of the furnace body adjacent to the first heat storage unit, the gas injection direction of the first fuel injection gun is parallel with that of the second fuel injection gun with a spacing H between the axes thereof, the gas injection direction of the third fuel injection gun is parallel with that of the fourth fuel injection gun, with a spacing H between the axes thereof, and the spacing H between the axes is set to a quarter to one tenth of the furnace body width, such that the gas entering the chamber are oppositely-injected to form a swirling flow.

Disclosed herein are a fluid sand falling type circulating fluidized bed boiler with a plurality of risers for preventing erosion and corrosion of water tubes and increasing combustion efficiency, and a method of operating the same. The fluid sand falling type circulating fluidized bed boiler with a plurality of risers includes a boiler section into which fuel and oxidizer are injected, a riser section connected to the boiler section so that the fuel and fluid sand supplied from the boiler section are introduced from the bottom of the riser section and flow up, and a relay section provided on the boiler section to supply the fluid sand having passed through the riser section to the boiler section, wherein the fuel is injected from the top of the boiler section and burned while flowing down therein.

A method for controlling a catalytic combustion apparatus having a heater capable of heating fuel to be supplied to a catalyst includes a step of supplying oxidant gas to the catalytic combustion apparatus, and an injection step of injecting the fuel into the catalytic combustion apparatus. The injection step also includes an electric power feeding step of supplying electric power to the heater, and a setting step of setting an injection amount of the fuel to be injected into the catalytic combustion apparatus in response to output of the heater.

The invention discloses an opposed-injection aluminum melting furnace uniform combustion system which comprises: a furnace body, a first heat storage unit, a second heat storage unit, and four fuel injection guns disposed diagonally on two end walls of the furnace body comprising a first fuel injection gun located on the first end wall of the furnace body adjacent to the second heat storage unit, a second fuel injection gun located on the second end wall of the furnace body adjacent to the first heat storage unit, a third fuel injection gun on the second end wall of the furnace body adjacent to the second heat storage unit, and a fourth fuel injection gun located on the first end wall of the furnace body adjacent to the first heat storage unit, the gas injection direction of the first fuel injection gun is parallel with that of the second fuel injection gun with a spacing H between the axes thereof, the gas injection direction of the third fuel injection gun is parallel with that of the fourth fuel injection gun, with a spacing H between the axes thereof, and the spacing H between the axes is set to a quarter to one tenth of the furnace body width, such that the gas entering the chamber are oppositely-injected to form a swirling flow.

A high temperature combustion device is provided that is configured to enable dynamic changes in the combustion environment to provide neutral, oxidizing, or reducing combustion environments. The device may include a blast tube and an air blower configured to motivate air through the blast tube. A nozzle for atomizing a fuel, such as vegetable oil, and more preferably waste vegetable oil, may be disposed in the blast tube. A fuel pump may be configured to motivate the fuel to exit the nozzle. An air supply line may be in fluid communication with the nozzle and may be configured to supply high-pressure air to the nozzle. The high-pressure air may exit the nozzle with the fuel in a first direction, and air motivated through the blast tube by the air blower may pass around the nozzle in a second direction that is substantially parallel to the first direction.

An injector of a propellant combustion member, the injector including a first feed and a second feed; the first feed being connected to a plurality of feed chimneys arranged around a longitudinal axis; the second feed being configured so as to feed an injection chamber; and the injection chamber being connected to a plurality of feed sheaths with injection orifices, each feed chimney being surrounded by a coaxial feed sheath; the injector including a takeoff chamber connected to a takeoff duct for taking off the second propellant, the takeoff chamber being arranged in such a manner as to take off the second liquid propellant from the injection chamber; and it is configured to achieve uniform injection of the second propellant via the injection orifices.

Disclosed herein are a fluid sand falling type circulating fluidized bed boiler with a plurality of risers for preventing erosion and corrosion of water tubes and increasing combustion efficiency, and a method of operating the same. The fluid sand falling type circulating fluidized bed boiler with a plurality of risers includes a boiler section into which fuel and oxidizer are injected, a riser section connected to the boiler section so that the fuel and fluid sand supplied from the boiler section are introduced from the bottom of the riser section and flow up, and a relay section provided on the boiler section to supply the fluid sand having passed through the riser section to the boiler section, wherein the fuel is injected from the top of the boiler section and burned while flowing down therein.

A method for controlling a catalytic combustion apparatus having a heater capable of heating fuel to be supplied to a catalyst includes a step of supplying oxidant gas to the catalytic combustion apparatus, and an injection step of injecting the fuel into the catalytic combustion apparatus. The injection step also includes an electric power feeding step of supplying electric power to the heater, and a setting step of setting an injection amount of the fuel to be injected into the catalytic combustion apparatus in response to output of the heater.

An injector of a propellant combustion member, the injector including a first feed and a second feed; the first feed being connected to a plurality of feed chimneys arranged around a longitudinal axis; the second feed being configured so as to feed an injection chamber; and the injection chamber being connected to a plurality of feed sheaths with injection orifices, each feed chimney being surrounded by a coaxial feed sheath; the injector including a takeoff chamber connected to a takeoff duct for taking off the second propellant, the takeoff chamber being arranged in such a manner as to take off the second liquid propellant from the injection chamber; and it is configured to achieve uniform injection of the second propellant via the injection orifices.