Abstract: The invention is directed to an optimized two-chamber eductor based incinerator system. The two-chamber optimized incinerator system includes a primary and a secondary combustion chamber, the system having a single fuel fired burner located in one of the secondary combustion chamber, or the eductor. The system also includes an eductor connecting the primary combustion chamber to the secondary combustion chamber, the eductor creating a recirculation flow through the first and the second combustion chambers.

Abstract: A new design for a low swirl burner is disclosed in which natural draft rather than a motorized pump is used to move a fuel-air mixture through the burner. This new design enables the burn off of gas at refineries in an environment where electric motors cannot be used because of the potential for sparks, which could trigger explosions. Additional modifications to the burner, including the introduction of flue gas to the burner allows for the reduction of NOx gas to meet current emission control targets, without the need for further post combustion emission control systems.

Abstract: The invention relates to a burner (B) for firing a combustion chamber, having a supply duct (Z1) for supplying combustion gas or combustion air into the combustion chamber, wherein the burner (B) has an inlet opening (E) via which flue gas (4) can flow into the supply duct (Z1). To be able to adjust the flow rate of the flue gas (4) flowing into the supply duct (Z1), the burner (B) comprises an adjustable throttle device (D).

Abstract: A method of preparing an oxidant stream comprising: burning a combustion mixture comprising (a) one or more fuel composition and (b) oxidant comprising a first oxygen content of about 10 mole % or more and a first carbon dioxide (CO2) gas content of about 68 mole % or more on a dry basis, the burning producing a flue gas comprising CO2 gas, water vapor, and unreacted oxygen; separating from the flue gas a recycle stream; mixing at least a portion of the recycle stream having a first pressure with a sufficient amount of an oxygen stream having a second pressure which is sufficiently higher than the first pressure to entrain at least a portion of the recycle stream in the oxidant stream and to produce the oxidant stream having a second oxygen content of 10 mole % or more and a second CO2 gas content of about 68 mole % or more on a dry basis.

Abstract: A furnace system 10 including a combustion vessel 12 having an outlet end 19 and at least one aperture 20, 22 extending into an interior area 14 defined by the combustion vessel. The furnace system 10 includes a flue duct 42 coupled to the outlet end 19 and in fluid communication with the interior area. A recirculation duct 55 extends from the flue duct 42 to one or more of the apertures 20, 22 and provides fluid communication between the flue duct 42 and the interior area 14.

Abstract: A process and an apparatus for the thermal incineration of oxidizable substances in a process gas are proposed, whereby the process gas is conveyed through an afterburning apparatus 10 comprising, inter alia, a combustion chamber 18 and a process gas outlet 24 in order to remove purified exhaust gas from the process gas outlet 24, and to mix said purified gas in with the process gas in order to maintain a constant concentration of the process gas.

Abstract: A butterfly-type step subassembly includes a substantially planar valve disc member having a peripheral groove formed in opposite surfaces thereof. Projecting inwardly from the internal walls of the subassembly housing are two non-coplanar, generally semicircular valve seat members having passageway(s) in them communicating outside the housing with a source of purified gas(es). The passageways terminate interiorly in apertures in respective recesses in the seat members positioned to be brought into communication with said grooves when said valve disc member is in substantial contact with said seat members. Means are provided to supply said purified gas(es) to said passageways in response to the movement of said planar disc member to the nominally closed position so that said gas(es) flow into the contact region between the disc and seat members under sufficient pressure to prevent said effluent from flowing through said valve when nominally closed.

Abstract: Temperature of exhaust gases from a fluidized-bed boiler is lowered by means of heat exchange and dust entrained in the exhaust gases is efficiently collected by a dust collector. Part of the gases discharged from the dust collector are mixed with heated combustion air and are charged into a fluidized bed. Therefore, problems caused by dust entrained in the exhaust gases to be mixed with the combustion air as well as the cold corrosion problem can be substantially solved so that the technique for reducing the NO.sub.x contents in the exhaust gases from the fluidized-bed boiler is satisfactorily established.

Abstract: A solid fuel boiler or furnace with a flue gas-air mixture introduced into the fuel grate is disclosed. The flue gas is mixed with air such that approximately 30% of the mixture is flue gas. By providing this mixture under the burning fuel bed, the temperature of the fuel bed is lowered and excess oxygen is reduced. A more reactive fuel bed results providing various advantages including improved boiler operation and a clinker-free fuel bed.

Abstract: A system of wood combustion employing forced draft is disclosed and comprises a forced draft air and flue arrangement which is utilized with a typical wood heater or wood stove. The forced air and flue arrangement includes a blower, a plenum on which the blower is attached, a panel to which the plenum is attached having air inlets formed therethrough, the air inlets being internal to the plenum, and a flue arrangement attached to the other side of the panel. The flue arrangement includes ducts leading from the air inlets, the ducts having air nozzle slits formed on the other end thereof which are communicable with the internal portions of the wood heater or wood stove. Forced air from the blower enters the combustion chamber through the air nozzle slits. Immediately adjacent to the air nozzle slits and formed as a portion of the flue arrangement is an internal flue outlet for providing an exhaust exit for combustion gases, the flue outlet being communicable with an exhaust pipe.

Abstract: This invention relates to a burning furnace of hot gas recirculation type for minimizing fuel cost. The furnace includes a cyclone which receives dust-containing exhaust gases. One or more secondary air-introducing nozzles are provided for the cyclone at top of or in close proximity to the upper end of the cyclone leading concentrically to a flue gas passage such as funnel. Upon introducing secondary air under pressure into the cyclone, a downwardly directing swirling air flow is formed therein for the separation of heavier dust together with part of the fed exhaust gases. The thus separated air-hot gas mixture including heavier dust particles is returned to initial stage of the furnace for the recirculation through the furnace.

Abstract: A solid fuel burner utilizing at least two stacked chambers one of which contains a combustion bed for the solid fuel burning process. A second chamber below the first bed containing chamber serves to combust volatile gases unburned in the first chamber with the aid of an oxidizing rejector.