A gas-fired burner for a drying drum of an asphalt mixing plant, such that the burner preferably has a central primary air duct (6), which opens into a combustion zone (4) via a swirl body (2). The burner has gas supply openings (9) in the area of the circumferential boundaries of the swirl body (2) for supplying fuel gas to the primary air for firing the burner. It has been shown that a stable and well-developed flame can be produced over a very large load range with such burners according to the disclosure.

The gas turbine combustor and the operation method thereof are designed to minimize visualization of exhaust gas from the gas turbine upon switching of the gas turbine fuel from the oil fuel to the gas fuel. Upon switching of the combustion by the pilot burner from the oil burning to the gas burning, the gas fuel is supplied to the main burners so as to start the gas burning. Then the gas fuel is supplied to the pilot burner to start the gas burning.

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.

Disclosed is a mixed combustion system fueled with ammonia, hydrogen and natural gas, which comprises a furnace chamber, a combustor, a heat exchanger, a mixer and a storage tank, the combustor and a conical combustion cavity are installed in the furnace chamber, the storage tank is provided with a first branch pipeline through a conveying pipe to be connected with the heat exchanger, the heat exchanger is connected with an inlet of the mixer, and an outlet of the mixer is connected with a fuel inlet of the combustor; and the conveying pipe is provided with a second branch pipeline connected with an ejector port of a first ejector, the first ejector is installed on a flue gas recirculating pipe connected with a furnace chamber flue gas exhaust pipeline, and the other end of the flue gas recirculating pipe is connected with an auxiliary fuel inlet of the combustor.

A gas turbine combustor includes: multiple gaseous fuel nozzles to inject gaseous fuel; a manifold to distribute gaseous fuel to the multiple gaseous fuel nozzles; a burner flange to secure a burner to an end cover; and a burner body to connect the manifold and the burner flange. Gaseous fuel passages are provided in the end cover, the burner flange, and the burner body. The gaseous fuel passage communicates with the manifold. A second manifold is provided in the burner flange. The gaseous fuel passage is provided in the burner body to make the second manifold communicate with the first mentioned manifold.

A heating assembly can be used with one of a first fuel type or a second fuel type different than the first. The heating assembly can include a housing have a first actuation member and a second actuation member. The first and second actuation members can be positioned within respective first and second fuel hook-ups. The first and second actuation members can be configured such that connecting a fuel source to the heater assembly moves one of the actuation members from a first position to a second position to control flow through the heating assembly.

A safety pressure switch can be used with a gas appliance. The gas appliance can be a single fuel or a dual fuel appliance for use with one of a first fuel type or a second fuel type different than the first. The safety pressure switch can be fluidly connected to a fuel input and electrically coupled to a pilot assembly.

A heating assembly can be used in a dual fuel heater to mix air with fuel to be combusted at the burner. The heating assembly can include a burner, a first nozzle, a second nozzle, a first conduit and a second conduit. The first conduit can have an opening configured to allow air to mix with fuel injected into the first conduit by the first nozzle.

An end apparatus (1) for a burner configured to generate a flame, comprising a supply conduit (5) for supplying a comburent and a combustion head (2) at least partially inserted into the supply conduit (5) so as to define a passage gap (9) between the combustion head (2) and the supply conduit (5) for a flow of comburent (C). In particular, the combustion head (2) comprises a plurality of outer openings (11), arranged outside the passage gap (9), configured to emit a first flow of fuel (F1) outside the flow of comburent and a plurality of inner openings (12) arranged at and/or inside the passage gap (9) adapted to introduce a second flow of fuel (F2, F2) inside the flow of a comburent.

Disclosed is an electronic control system connected to a gas judgment assembly with an oxygen depletion sensor assembly and a sensor such as an ion induction needle to determine whether a flame is present. The gas judgment assembly includes a nozzle associated with the oxygen depletion sensor assembly that is large enough to permit a flame if the fuel is liquid propane, but small enough to prevent a flame if the fuel is natural gas, and send a signal indicating a flame or no flame status to the control system. The control system can thereafter determine whether a flame is present and, if so, conclude that liquid propane fuel is being directed to the gas judgment assembly while the system is in the natural gas mode. The control system can then open a relay, disconnecting current flow to a solenoid valve if a flame is sensed.