A method of operating a combustion burner to heat a furnace. Fuel and combustion air are supplied into a combustion zone and ignited. Additional combustion air is supplied into the atmosphere outside of the combustion zone. The amount of additional combustion air supplied outside of the combustion zone is decreased as a temperature of the atmosphere inside the furnace increases such that the content of nitrogen oxides (NOx), as corrected for 3% O.sub.2 (cNOx (3% O.sub.2)), in the gases generated by combustion of the fuel and the combustion air and emitted from the furnace maintained below a predetermined value.

In a combustion apparatus provided with: a combustion box having a connection flange part for connecting a heat exchanger to an upper end of the combustion box; a partition plate disposed inside the combustion box for partitioning space inside the combustion box into a combustion chamber and an air supply chamber which lies under the combustion chamber; and a plurality of laterally arrayed burners which are elongated longitudinally, the internal volume of the combustion box is increased without increasing a height dimension or without enlarging the connection flange part, thereby restraining the occurrence of resonance sounds. A drawn part projecting laterally outward of the combustion box is provided in such a portion of each side-plate part as is above the partition plate, over a predetermined range in the vertical and longitudinal directions. An upper side of the drawn part is preferably positioned below the upper end of the burners, and is preferably parallel with the upper end of the burners.

The present disclosure is generally directed to a burner and boiler/furnace for pressurized oxy-combustion boilers and furnaces. The disclosure includes a design of a burner and boiler for a staged, pressurized oxy-combustion (SPOC) technology process and designs that affect wall heat flux. The disclosure further includes the introduction of wall rings to increase, for example, advection.

Various aspects provide for a multistage fluidized bed reactor, particularly comprising a volatilization stage and a combustion stage. The gas phases above the bed solids in the respective stages are separated by a wall. An opening (e.g., in the wall) provides for transport of the bed solids from the volatilization stage to the combustion stage. Active control of the gas pressure in the two stages may be used to control residence time. Various aspects provide for a fuel stream processing system having a pretreatment reactor, a combustion reactor, and optionally a condensation reactor. The condensation reactor receives a volatiles stream volatilized by the volatilization reactor. The combustion reactor receives a char stream resulting from the removal of the volatiles by the volatilization reactor.

A household stove burner with upper intake air and super-high power includes cup body, distributor base, central distributor, outer ring distributor, ignition needle, induction needle, air intake base, central air intake tube, left air intake tube, right air intake tube, gap between central air intake tube, light tube portion of central tube. The gap between left air intake tube and light tube portion of left outer ring tube, gap is between right tube and light tube portion of right outer ring air intake tube, a lower end of air intake cavity of distributor base is docked with outer ring pre-mixing cavity, outer interface of outer ring distributor is inserted into outer ring fuel gas tank, inner ring wall plate of outer ring fuel gas tank inserted into outer ring distributor. Outer ring flame stabilizing slot to prevent generation of outer ring firm flame to improve dissipation performance.

A burner system for a cooking device has at least one burner surface wherein the at least one burner surface is designed in such a way that the burner system has a low minimum power density with homogeneous temperature distribution at the same time. In a first aspect, the burner system includes a fuel supply and a first burner surface for burning the fuel that is provided downstream of the fuel supply. The burner system includes a second burner surface for afterburning that is separate from the first burner surface and is provided downstream from the first burner surface. Moreover, a method for operating the burner system is shown.

A boiler performs mixed-fuel combustion of a sulfur-containing fuel and ammonia as a fuel, and includes a furnace having a plurality of wall parts, a burner installed on at least one of the wall parts of the furnace, and an ammonia injection port that is configured to cause the ammonia to be burned as the fuel to flow along an inner wall surface of the wall part where the burner is not installed.

A fire pit includes an engine having at least one wall defining an inner chamber. At least one primary air aperture is defined through the inner chamber wall at a first, lower level, and at least one secondary air aperture is defined through the inner chamber wall at a second, upper level. A fuel grate is supported within the inner chamber at a level between the lower level and the upper level.

Disclosed is a system and method for the combustion of biomass material employing a swirling fluidized bed combustion (SFBC) chamber, and preferably a second stage combustion carried out in a cyclone separator. In the combustion chamber, primary air is introduced from a bottom air box that fluidizes the bed material and fuel, and staged secondary air is introduced in the tangential direction and at varied vertical positions in the combustion chamber so as to cause the materials in the combustion chamber (i.e., the mixture of air and particles) to swirl. The secondary air injection can have a significant effect on the air-fuel particle flow in the combustion chamber, and more particularly strengthens the swirling flow, promotes axial recirculation, increases particle mass fluxes in the combustion chamber, and retains more fuel particles in the combustion chamber. This process increases the residence time of the particle flow. The turbulent flow of the fuel particles and air is well mixed and mostly burned in the combustion chamber, with any unburned waste and particles being directed to the cyclone separator, where such unburned waste and particles are burned completely, and flying ash is divided and collected in a container connected to the cyclone separator, while dioxin production is significantly minimized if not altogether eliminated. A Stirling engine along with cooling system and engine control box is integrated with the SFBC chamber to produce electricity from the waste combustion process. Residual heat in the flue gas may be captured after the combustion chamber and directed to a fuel feeder to first dry the biomass. System exhaust is directed to a twisted tube-based shell and tube heat exchanger (STHE) and may produce hot water for space heating.

A household stove burner with upper intake air and super-high power includes cup body, distributor base, central distributor, outer ring distributor, ignition needle, induction needle, air intake base, central air intake tube, left air intake tube, right air intake tube, gap between central air intake tube, light tube portion of central tube. The gap between left air intake tube and light tube portion of left outer ring tube, gap is between right tube and light tube portion of right outer ring air intake tube, a lower end of air intake cavity of distributor base is docked with outer ring pre-mixing cavity, outer interface of outer ring distributor is inserted into outer ring fuel gas tank, inner ring wall plate of outer ring fuel gas tank inserted into outer ring distributor. Outer ring flame stabilizing slot to prevent generation of outer ring firm flame to improve dissipation performance.