A cooking appliance is provided, including a multi-level gas burner with a body having a lower burner section on a lower side and an upper burner section on an upper side. The lower burner section is separated from the upper burner section. The lower side of the body has a first injection point for receiving a first air-gas mixture for the lower burner section and a second injection point for receiving a second air-gas mixture for the upper burner section. The first injection point is partitioned from the second injection point thereby separating the first air-gas mixture from the second air-gas mixture. The body includes a passageway fluidly connecting the second injection point on the lower side of the body to the upper burner section on the upper side of the body.

A fuel gas nozzle used in a microturbine includes a first chamber, a second chamber connected to the first chamber, a pilot fuel gas pipe, a main fuel gas pipe and an intake pipe. An intake zone and a mixing zone are respectively formed in the first chamber and the second chamber and are communicated with each other. The pilot fuel gas pipe is for introducing a first fuel gas into a downstream of the second chamber. The main fuel gas pipe is for introducing a second fuel gas into the mixing zone via the intake zone. The intake pipe is for introducing an air into the mixing zone. A centerline of the intake pipe is not intersected with a centerline of the second chamber, so as to induce a vortex flow field of the air flowing into the mixing zone for mixing the air and the second fuel gas.

An apparatus that regulates the size and intensity of a torch flame by controlling the release of oxygen and a fuel, such as propane. The apparatus releases oxygen and fuel by pivoting a flame control plate that opens and closes mini ball valves using a mini ball connecting bracket. The further forward the plate is pivoted, the more open the valves become increasing the size and intensity of the torch flame. Slotted holes at different angles on the mini ball valve connecting bracket cause the apparatus to release oxygen first resulting in a quiet flame ignition and to release oxygen last to blow out the last flow of fuel, resulting in a safe operation.

A cooking appliance is provided, including a multi-level gas burner with a body having a lower burner section on a lower side and an upper burner section on an upper side. The lower burner section is separated from the upper burner section. The lower side of the body has a first injection point for receiving a first air-gas mixture for the lower burner section and a second injection point for receiving a second air-gas mixture for the upper burner section. The first injection point is partitioned from the second injection point thereby separating the first air-gas mixture from the second air-gas mixture. The body includes a passageway fluidly connecting the second injection point on the lower side of the body to the upper burner section on the upper side of the body.

A high turn down ratio flare tip assembly, that allows for both low and high flowrate and pressure flows using a single flare. The flare assembly comprising a nozzle tube connected to the waste stream fuel inlet at one end. The other end of the flare tip assembly providing a seat for a conical structure with flow through orifices/ports that allow the waste stream to flow therethrough during low pressure operation. The conical structure connected to one end of a connecting rod, the connecting rod extending longitudinally downward through the nozzle tube and connected to a spring assembly. The flare tip assembly is designed to allow low flow and pressure to pass through the cone orifices, and during high flow and pressure operation, the cone is unseated from the nozzle tube, allowing the waste stream to flow therethrough. The flare tip assembly also includes a slotted/holed shroud that allows for smokeless combustion of the waste stream during high flow and pressure conditions.

A high turn down ratio flare tip assembly, that allows for both low and high flowrate and pressure flows using a single flare. The flare assembly comprising a nozzle tube connected to the waste stream fuel inlet at one end. The other end of the flare tip assembly providing a seat for a conical structure with flow through orifices/ports that allow the waste stream to flow therethrough during low pressure operation. The conical structure connected to one end of a connecting rod, the connecting rod extending longitudinally downward through the nozzle tube and connected to a spring assembly. The flare tip assembly is designed to allow low flow and pressure to pass through the cone orifices, and during high flow and pressure operation, the cone is unseated from the nozzle tube, allowing the waste stream to flow therethrough. The flare tip assembly also includes a slotted/holed shroud that allows for smokeless combustion of the waste stream during high flow and pressure conditions.

A combustion system for a coal fired furnace having a windbox includes a source of a mixture of pulverized coal and air, and a splitter that receives the mixture and splits it into first and second mixed streams. A first nozzle receives the first mixed stream and discharges it into the furnace. A separator receives the second mixed stream and separates it into an air stream and a coal rich stream. An air conduit connected between the separator and the source of the mixture causes at least some of the air stream to be fed back into the mixture. A second nozzle receives the coal rich stream and discharges it into the furnace. A third nozzle receives support air from the windbox and discharges it into the furnace in a combustion supporting relationship with respect to the coal rich stream.

An injet for a gas burner includes a first gas orifice and a second gas orifice. An injet body defines an air passage and a gas passage. The first and second gas orifices are mounted to the injet body. A pneumatically actuated gas valve blocks a flow of gaseous fuel through the gas passage to the second gas orifice in a closed configuration. The pneumatically actuated gas valve is configured to adjust from the closed configuration to an open configuration in response to a flow of air through the air passage. A flow restriction body is disposed upstream of the pneumatically actuated gas valve. The flow restriction body defines a through hole via which air is flowable to pneumatically actuated gas valve.

A fuel gas nozzle used in a microturbine includes a first chamber, a second chamber connected to the first chamber, a pilot fuel gas pipe, a main fuel gas pipe and an intake pipe. An intake zone and a mixing zone are respectively formed in the first chamber and the second chamber and are communicated with each other. The pilot fuel gas pipe is for introducing a first fuel gas into a downstream of the second chamber. The main fuel gas pipe is for introducing a second fuel gas into the mixing zone via the intake zone. The intake pipe is for introducing an air into the mixing zone. A centerline of the intake pipe is not intersected with a centerline of the second chamber, so as to induce a vortex flow field of the air flowing into the mixing zone for mixing the air and the second fuel gas.

A device for controlling a fuel-oxidizer mixture for a premix gas burner, comprises: an intake duct for admitting the mixture into the burner; an injection duct, connected to the intake duct to supply the fuel; a monitoring device for checking the state of combustion in the burner; a gas regulating valve; a fan located in the intake duct; a control unit for controlling the speed of rotation of the fan between a first and a second rotation speed, corresponding to a minimum flow rate of oxidizer (Qmin) and a maximum flow rate of oxidizer (Qmax), respectively; a regulator coupled to the intake duct and having a first aperture, adjustable through a first shutter, and a second aperture, adjustable through a second shutter. The control unit is configured to drive the gas regulating valve in real time.