Abstract: A method for manufacturing a liquid fueled rocket engine involves forming a first flange in apposition to a top end of a first tube, fixing an injector head to the first flange to form an inner shell liner assembly, shaping the inner shell liner assembly, forming a second flange in apposition to a top end of a second tube, positioning the inner shell assembly inside the second flanged tube and fixing the second flange to the injector head. Rocket engines manufactured using the method have performance superior to existing rocket engines in at least one parameter.

Abstract: This invention provides a system and method for efficiently and completely combusting oil in mixture with particulate solids. A furnace (kiln) having a feed nozzle with a lead screw drives the mixture from a feed hopper. This nozzle includes forced-air jets/ports at its tip providing makeup air and allowing atomization of the mixture. The nozzle thereby directs the mixture into a rotating combustion chamber that is tilted downwardly from the front toward a solid waste outlet port at the rear. Uncombusted fuel and air backflow to an upper, secondary chamber near the primary chamber front, and are completely combusted at a high temperature. Gasses exit a flue that can include a heat exchanger. This heat exchanger can be operatively connected to a heating device or other mechanism that converts the heat into usable energy. The nozzle can include a cone with axially tilted air ports about its perimeter.

Abstract: A furnace-heating combustion apparatus that allows adjustment of a ratio between the amount of primary air and the amount of secondary air. A double-tube elongate burner extends through a rear wall portion of an air box disposed away from a furnace wall. The leading end portion of the burner is disposed inside a tube section such that a secondary air conduit is formed between an outer circumferential face of the leading end portion and an inner circumferential face of the tube section. A primary air conduit is provided at the leading end portion of the burner to introduce the air inside the air box from the rear end portion and cause it to flow toward the leading end portion. A burner supporting means is provided for to allow adjustment of the position of the burner in the longitudinal direction relative to the rear wall of the air box.

Abstract: A pulverized coal-fired boiler efficiently supplies air to a central part of a furnace and the neighborhood of a furnace wall, thereby promoting mixture with combustion gas, and reducing both NOx and CO. The main after air ports are structured so as to jet air having a large momentum for enabling arrival at the central part of the furnace, and the sub-after air ports are structured so as to jet air having a small momentum to the neighborhood of the wall face of the furnace, and a sectional center of each of the sub-after air ports is within a range from 1 to 5 times of a caliber of the main after air ports from a sectional center of each of the main after air ports.

Abstract: The grate is used for burning a granular fuel material, for instance a biomass material, to be fed onto a loading area of the grate while a primary air feed is coming from below the grate. The grate includes a perforated bed floor having a downwardly-sloping upper surface converging towards a discharge opening where char is concentrated as the granular fuel material is burned during operation. The grate also includes an elongated and bottom-perforated char-receiving conduit positioned immediately under the bed floor. The char-receiving conduit has an inlet end positioned under the discharge opening, and an outlet end that is opposite the inlet end. The char-receiving conduit downwardly slopes between the inlet end and the outlet end. A method of burning a granular fuel material is also disclosed. The proposed concept can increase the overall thermal efficiency of a heat generator and reduce gas and particle emissions in the atmosphere.

Abstract: A pneumatic fuel distributor for solid fuel boilers is described incorporating in various embodiments one or more of the following features: a converging nozzle section, a converging adjustable orifice section and an integral trajectory plate. The nozzle, orifice and trajectory plate are preferably all interconnected and rotate together about a common axis. The orifice damper is, in one embodiment, a rotating convergent section and independently adjustable. The unit preferably incorporates a viewing glass and access port and the rotating components are preferably removable for maintenance. The unit is preferably reversible for left or right hand installation and the trajectory plate is easily replaceable.

Abstract: A combustor assembly in a coal burning power plant includes a combustor housing that defines a combustion zone in which pulverized coal is burned, at least one burner that introduces pulverized coal into the combustion zone, and an overfire air port that injects air into the combustor housing above the combustion zone, the overfire air port being generally not movable with respect to the combustor housing. The combustor assembly further includes a nozzle assembly associated with the overfire air port. The nozzle assembly includes a flow directing structure disposed within the overfire air port, which flow directing structure is tiltable with respect to the overfire air port to effect a change in a flow direction of the air being injected into the combustor housing through the overfire air port.

Abstract: The present invention relates to a combustion chamber comprising an enclosure (1) having at least one fuel injection means (2), at least one oxidizer injection means (3) and at least one combustion fumes withdrawal means (5), wherein enclosure (1) has the shape of a bent closed tube of any section, and the fuel (2) and oxidizer (3) injection means are arranged on enclosure (1) so as to be offset by an angle ? formed by each of the oxidizer and fuel injection positions with respect to centre (C) of the enclosure, ranging between 10° and 90°, and wherein the oxidizer injection means is a means of injecting an oxidant that is a gas with an oxygen concentration above 90%.

Abstract: A nozzle system for a fluidized bed including a pipe for insertion through an air distributor plate in the fluidized bed and extending up through a refractory material on the air distributor plate. A shaft is received in the pipe and has a washer and a collar which supports the shaft on the distal end of the pipe. A cap includes a top surface supported by a skirt, defining a protected annular exhaust space between the shaft and the cap skirt. Spaced discreet supports extend inwardly from the cap skirt supporting and centering the cap on the shaft.

Abstract: Disclosed is a combustor including a baffle plate having at least one through baffle hole and at least one fuel nozzle extending through the at least one baffle hole. At least one shroud is secured to the baffle plate and includes at least one piston ring disposed at the shroud. The at least one piston ring is configured to meter a flow of diluent between the at least one shroud and the at least one fuel nozzle. Further disclosed is a method for providing diluent to a combustor including providing a piston ring gap defined by at least one piston ring disposed at a baffle plate and a fuel nozzle extending through a through hole in the baffle plate. The diluent is flowed through the piston ring gap toward at least one airflow hole in the fuel nozzle.

Abstract: A device for optimizing coal-air proportions entering a furnace is disclosed. The invention generally comprises a burner nozzle having two ends and an outer tube forming a perimeter of the burner nozzle; an entry spool having a rear wall and defining an inlet port at one of the ends of the burner nozzle; an inner tube formed within the burner nozzle; an annular blade chamber defined between the outer tube and the inner tube; and, a blade formed within the blade chamber configured as an extension of the rear wall of the entry spool, the blade twisted to form a spiral around the inner tube, wherein fuel particles can be separated from a primary air stream and collected on the blade to form a coal-concentrated stream for entry into the furnace. As a result, three separate streams are injected into the furnace, thereby minimizing NOx through the concentration of solid fuel.

Abstract: An Overfire Air (OFA) port design and method for use in a furnace system is disclosed. The OFA port design effectively reduces the amount of harmful pollutants emitted into the atmosphere upon discharge from an associated furnace.

Abstract: A register for use in conjunction with kraft recovery boilers or bark-fired boilers utilizes a pair of shaped damper foils to reduce turbulence and induce laminar flow of air from an associated windbox through a port in the boiler. The foils are mounted for constant minimal separation from an exit nozzle to reduce transitional discontinuities which induce turbulence. A curved plenum is also provided to reduce internal turbulence within the plenum.

Abstract: In a recovery boiler for burning spent liquor of a pulp mill, a combustion chamber has heat transfer walls formed of tubes, at least one vertical heat transfer surface formed of tubes, and superheaters in an upper part of the combustion chamber for recovering heat generated by combustion and for cooling flue gases. The at least one vertical heat transfer surface divides the combustion chamber in a transverse direction into two combustion spaces.

Abstract: An apparatus for self cleaning a thermal oxidizer that is thermally treating and decontaminating gases is disclosed. The apparatus for self cleaning the thermal oxidizer can clean the accumulated dust out from inside the thermal oxidizer without requiring disassembly of the unit. The apparatus for self cleaning can also accomplish this cleaning cycle without interrupting the normal operation of the thermal oxidizer. Dust cleaned out from the apparatus for self cleaning the thermal oxidizer is decontaminated by the same thermal treatment that decontaminates the gases processed by the thermal oxidizer. Many of the existing thermal oxidizers already in operation can be retrofitted to become self cleaning thermal oxidizers. It is also possible to include the apparatus for self cleaning in a new thermal oxidizer.

Abstract: Apparatus for installation in an associated coal pipe for directing pulverized coal to an associated furnace assembly that includes a housing having an inlet, an outlet, and an access port intermediate the inlet and the outlet. The apparatus also includes a generally circular orifice, a tray dimensioned and configured for carrying and engaging the orifice and apparatus. The chamber is generally aligned with the access port and is dimensioned and configured for receiving the tray with the orifice carried thereon. The apparatus in the housing defining a chamber allows sliding movement of the tray with the orifice carried thereon into and out of the chamber through the access port.

Abstract: The secondary air nozzle for furnaces has a curved base body which is provided with pins for holding a ceramic protective casing. A protective strip which projects radially from the base body is arranged along the longest line of curvature proceeding from the nozzle opening until beyond the curved part, its radial dimension corresponding at least to the thickness of the ceramic protective casing. The protective strip is constructed as a rib which projects radially from the base body and is outfitted with pins for supporting the ceramic body.

Abstract: In a steam generating boiler having a bottom wall supporting a char bed and sidewalls with ports through which air is admitted for combustion of combustible species in the char bed and emanating therefrom, combustion is improved by introducing an oxygen-containing gas into a lower central zone of the boiler, from at least one point remote from the sidewalls to thereby cause intimate mixing of the oxygen contained in the gas with the combustible species.

Abstract: A process for thermally converting components of gas currents contaminating the environment and equipment for performing the process. Combustion serving for the primary heat production is performed in the gas current to be converted thermically and in a plurality of places in proper distribution. In such a manner, gas currents next to the flames produced in the course of combustion are heated to high temperatures and by utilizing the secondary heat quantity arising in the course of the thermic conversion taking place quickly in the vicinity of the flames, the process of thermal conversion is further accelerated.

Abstract: A furnace using pelletized wood as a fuel and a system for controlling the operation of the furnace are described. Pelletized wood stored in a hopper is fed into the combustion chamber of the furnace from an elevated position; and combustion of the pelletized wood is controlled by microprocessor-based circuit which receives input signals representative of the interior and exterior temperatures of the building, the air flow and the level of fuel in the combustion chamber and processes this information in accordance with a predetermined program to switch the furnace into one of two modes. In the `low` mode, the exterior temperature is below a certain value for example, 0.degree. C., but the interior temperature is above it. In this case a fire is maintained in the combustion chamber in anticipation of the interior temperature falling beneath this value.