The present disclosure relates to systems and methods that are useful for controlling one or more aspects of a power production plant. More particularly, the disclosure relates to power production plants and methods of carrying out a power production method utilizing different fuel chemistries. Combustion of the different fuel mixtures can be controlled so that a defined set of combustion characteristics remains substantially constant across a range of different fuel chemistries.

A heating system can include certain pressure sensitive features. These features can be configured to change from a first position to a second position based on a pressure of a fuel flowing into the feature. These features can include, fuel selector valves, pressure regulators, burner nozzles, and oxygen depletion sensor nozzles, among other features.

A dual fuel heating system can be used in a gas appliance. A dual fuel heating system can have a fuel selector valve for selecting between a first fuel and a second fuel different from the first. The dual fuel heating system can include a regulator unit configured to regulate the pressure of the two different fuels. The selector valve determines which flow path for which fuel is open and which is closed.

Systems and methods are disclosed that may include providing a dual fuel burner in a superheater truck to burn wellhead gas produced from a wellhead in a first fuel burner and burn at least one of methane, ethane, propane, butane, gasoline, diesel, liquified natural gas (LNG), natural gas liquids (NGLs), and wellhead gas in a second fuel burner to heat water and/or other chemicals used in hydrocarbon production and/or well completion processes, including, but not limited to hydraulic fracturing (fracking). The first fuel burner may be integrated with the second fuel burner such that fuel rail fingers of the first fuel burner are interstitially spaced with fuel rail fingers of the second fuel burner. The first fuel burner and the second fuel burner may be operated independently from each other. The first fuel burner and the second fuel burner may alternatively be operated simultaneously with each other.

Systems and methods are disclosed that may include producing wellhead gas from a wellbore, removing hydrocarbons and/or other particulates from the wellhead gas produced from the wellbore to maximize and/or provide a consistent BTU level to the wellhead gas, and burning the wellhead gas in a wellhead gas burner to heat water and/or other chemicals used in hydrocarbon production and/or well completion processes, including, but not limited to hydraulic fracturing (fracking). The wellhead gas burner may also be configured as a primary heat source and integrated with a traditional gas burner system configured as a supplemental heat source. The wellhead gas burner and the traditional gas burner may also be operated simultaneously. The wellhead gas burner may also be mounted to a mobile superheater truck.

A combined combustion burner and a combustion apparatus including the combined combustion burner. The combined combustion burner may include a center tube forming a center passage configured to supply cooling air, a fuel tube surrounding the center tube and forming a fuel passage through which premixed fuel mixed with solid fuel and primary air is sprayed, a secondary tube surrounding the fuel tube and forming a secondary passage through which secondary air is sprayed, and an additional spray nozzle inserted inside the center tube and configured to spray auxiliary fuel containing ammonia.

Method and kiln for the firing of base ceramic articles (BC) comprising: a firing chamber inside which the base ceramic articles (BC) to be fired are conveyed; at least one burner for burning a combustion mixture to heat the firing chamber and to fire the base ceramic articles (BC); first and second feeding device for feeding, respectively, a fuel mixture and an oxidizer to the burner; an identification unit configured to assess the type of fuel mixture and a control assembly which is configured to activate the feeding device and/or the second feeding device depending on the temperature detected in the firing chamber, and to adjust the activation of the second feeding device depending on the type of fuel mixture and on the flow rate of the fuel mixture and on the flow rate of the oxidizer.

Pilot fuel injectors for combustors of gas turbine engines are provided. The pilot fuel injectors include a swirler having an exit into a combustion chamber of the combustor and a nozzle located within the swirler. The nozzle includes a primary fuel circuit configured to atomize fuel dispensed therethrough and a secondary fuel circuit having a first sub circuit having at least one injection aperture a first injection depth from the exit of the swirler and a second subcircuit having at least one second injection aperture located at a second injection depth from the exit of the swirler, wherein the first injection depth is greater than the second injection depth.

A cooking grill includes a container defining a combustion area and a cooking surface over the combustion area. The grill features a pellet burner unit disposed within the container under the cooking surface and a pellet feeding device arranged to feed pellets into the burner unit. The burner unit comprises a trough into which the pellets are fed. The trough is mounted in a movable support which can be pulled out from within the container. The feeding device includes a removable cartridge for containing pellets and a receptacle for receiving the cartridge inserted thereon so that the cartridge supplies pellets for transfer to the pellet burner unit. In addition, a gas burner system is arranged in the container adjacent to the pellet burner unit so as to apply heat from the gas burner system to the cooking surface in addition to or as an alternative to the pellet burner unit.

A method for controlled operation of a heated industrial furnace having a furnace chamber is provided. Fuel is conducted into the furnace chamber virtually without combustion air and a gaseous oxygen carrier is also conducted. The supply of fuel and the gaseous oxygen carrier is controlled by a control loop. A first adjustable manipulated variable in the form of a flow of fuel and/or a second adjustable manipulated variable in the form of a flow of the gaseous oxygen carrier is set by a final controlling element. In the control loop, an energy requirement is determined and fed to a quantitative control and to a quantitative fuel control for the fuel. The flow of the gaseous oxygen carrier is determined as a process value of a flow of the gaseous oxygen carrier and the flow of fuel is determined as a process value of a volumetric flow of fuel.