Abstract: A gas burner of a low noise, high load combustion type, which produces a flame of a mixture gas prepared or mixed preliminarily. In this burner, an inner flame of a laminar flow is formed and then secondary air of a turbulent flow is supplied to an outer flame portion of a trailing stream of the inner flame from secondary air ports. The inner flame is provided in the form of a laminar flame, and secondary air is thus supplied to an outer flame portion of the inner flame, so that combustion takes place at a low noise level. In addition, since the secondary air is supplied at a turbulent flow, the secondary air may be fixed with an outer flame quickly, thus enabling high load burning or combustion. Furthermore, in case secondary air is supplied from secondary air ports in the form of a laminar flow at a relatively high flow velocity, and then rendered turbulent, downstream of the secondary air ports, then the size of a burner may be reduced, with an accompanying simplified construction.

Abstract: In a burner assembly connected with a combustion chamber at a fuel inlet of said combustion chamber, the improvement of which comprising a fuel duct which is connected at its one end to said fuel inlet and contains therein a fuel injection nozzle, ignition rod and air-fuel mixture diffuser, a blower means which has an outlet for blowing an air through said outlet of the blower means and said fuel duct into said combustion chamber, and a conduit member coupled to said inlet of the blower means, whereby pneumatic oscillation plane progressive waves are converted into plane stationary waves to thereby reduce progressive energy of said pneumatic oscillation plane progressive waves.

Abstract: A flare stack gas burner for waste combustible gas from oil refineries, chemical plants, oil production rigs, LPG and other marketing terminals, pipe lines and the like is disclosed which includes a stack for waste gas delivery with an air delivery pipe therein with a plurality of outwardly extending hollow vanes at the top with fixed inclined nozzles along the tops of the vanes for discharge of air into the combustible gas advancing in the stack in a plurality of flat inclined streams at an inclination from the horizontal in a hollow frustoconical vortex combustion path, the inclined streams contacting combustible gas on each face and into the vortex path and around the exterior for completing combustion.

Abstract: A burner can, including a noise suppressing cavity, for use in the combustor assembly of a gas turbine engine to minimize the combustion noise emitted by the engine, is disclosed. The cavity is mounted at an end of the burner can that includes a fuel nozzle for injection of fuel into the interior of the burner can and is in acoustic communication with the interior of the burner can via a perforated metal sheet that forms a partition between the burner can and the cavity. The cavity is dimensioned and arranged in view of the acoustic transmission system formed by the burner can and the duct system that interconnects the burner can with the engine turbine stage to exhibit an acoustic impedance which minimizes the propagation of combustion noise from the burner can through the engine turbine stages to thereby reduce the engine noise level.

Abstract: A combustor is described for use in populated areas which may be elevated, and mounted on the roof of a building or which may be mounted on the ground, the combustor being adapted for waste gas having a very low btu content, or is a very dirty gas containing tars and particulate material, or is a very low pressure gas which has insufficient kinetic energy to mix readily with air, an upright combustion chamber open at the top being employed surrounded by an acoustical fence to reduce transmission of noise from the combustion and from secondary air supplied over the fence to reduce wind effect, and to reduce light transmission from the combustion process, the burners being disposed beneath a radiation floor and being independent and separately removable for cleaning without shut down of the combustor.

Abstract: A flare burner of the ground flare type for incinerating waste combustible gas from refineries and the like is disclosed, for use in populated areas, which has a plurality of waste gas burner heads for simultaneous operation at the same level, which may be utilized as a ground flare or which may, in a modified form, be elevated and provided with a bottom heat shield, which can have additional combustible liquid waste burners in one or more side walls, the flare burner having a combustion chamber with an improved panel construction and a fence of the knock out type to minimize wind effects and to provide an acoustical barrier so that noise transmission horizontally from the lower air inlets is greatly reduced.

Abstract: A silencer device for an industrial burner is adapted to be positioned over the air intake orifice of the burner tube of the industrial burner and provides two separate air intake paths. One of the air paths is through a central outer port and then between a cylindrical noise suppressing core member, having a perforated conical face on one end backed by a noise absorbent material, and the inner perforated wall of a toroid-shaped member. The other air path is through circumferential openings at the rear end of the silencer device.

Abstract: A flare for the burning of waste gases which is designed to provide a minimum of noise and smoke pollution, comprising a vertical stack having a shroud in the form of a cylinder surrounding, and spaced outwardly from, the top portion of the stack, and extending above the top of the stack. The space between the shroud and the stack is closed off by an annular plate which serves to support the shroud from the stack. At the top of the shroud is a steam manifold which carries a plurality of steam nozzles spaced angularly around the inner face of the manifold, so as to direct high velocity steam jets inwardly and upwardly toward the axis of the stack. The nozzles are placed on the inner face of the manifold so as to be substantially below and inside of the outer contour of the manifold and the shroud. The outer circumference of the shroud near its bottom end is perforated with a plurality of circumferentially spaced openings through which air can pass to the annular space between the shroud and the stack.

Abstract: A combination oil and gas burner is shown with the noise attendant upon the delivery of the primary and secondary air for combustion and the noise of the combustion muffled or suppressed by sound absorbing material disposed to reduce sound transmission to a low level.

Abstract: A gas valve and mixing tube for a gas burner are held frictionally together by a plastic bushing which fits around the hood of the valve and within the upstream end of the mixing tube. The body of the bushing and a flange thereon maintain adjacent parts of the valve and tube out of metal-to-metal contact to eliminate rattling. The bushing is short enough not to interfere with the primary air inlet opening. Interior ribs in the bushing permit articulation of the valve and tube to facilitate installation in cramped quarters. The bushing and internal ribs are tapered to facilitate assembly of the three parts.

Abstract: A flare gas burner is described for the smokeless combustion of flare gas at low noise level with the flare gas mixed with steam at the end of the flare burner, the steam being introduced into the flare gas flow and at the center of the vortex of the flow. The apparatus includes vanes to mix the gases and steam and acoustically lined baffling to reduce noise.

Abstract: A flare gas burner is described for the smokeless combustion of flare gas at low noise level with the flare gas delivered in a hollow whirling path for burning, ignited and burned with air and steam delivered interiorly and exteriorly, also in whirling paths intersecting or overlapping the delivered flare gas, additional steam being supplied at the outer margin of the outer air path, a diffuser being provided for the interior air and steam. The structure is also provided with a diode in the gas path to prevent flashback and with accoustically lined baffling to reduce noise.

Abstract: A drying plant utilizing a flame jet comprises a jet burner supporting device which is provided over a treatment tank, and a sound arresting device which is formed at a burner inserting port in the upper surface of the treatment tank. A jet burner drawn out of the treatment tank is inclined to bring the fore end of the burner close to an ignition device, thus to ignite the burner. While observing the ignited burner externally through a transparent tube, combustion is controlled to establish the perfect combustion. Loud noises at the adjustment of the combustion are prevented by the sound arresting device from being given forth to the outside. A matter to-be-dried, such as paper manufacture sludge, supplied into the treatment tank is crushed by flames of the jet burner at high temperature and at high speed without being burnt. The treated matter is taken out as the dried matter.

Abstract: A combustion system, such as a recuperator in a furnace, has a combustion chamber, a burner which communicates with the combustion chamber and tends in operation to produce acoustic waves leading to the development of vibrations, and a conduit communicating with the burner and supplying thereto a stream of fuel fluid. The development of the waves and vibrations is precluded by providing in the conduit upstream of the burner a compartment having a volume equal to forty times the product of the cross-sectional area and the diameter of the conduit so that the acoustical waves originating in the burner are reflected, and the conduit is further intermediate the burner and the compartment so constructed as to be of unobstructed cross-section and has a length equal to substantially one-quarter of the wave length of sound waves which would develop if the vibrations were allowed to occur.

Abstract: A noiseless premix burner comprising a cylindrical housing which is attached to the outer covering of the furnace wall, and closed at its opposite end by a closure plate which supports a concentric burner tube which extends from the closure plate through an opening in the furnace wall to the interior of the furnace. A gas fuel line is inserted along the axis of the burner tube. Pressurized fuel gas flows through an orifice in the fuel line in an expanding flow. The proximal end of the burner tube has a venturi type throat construction. The annular space between the burner tube and the cylindrical housing comprises two plenums, one adjacent the outer wall of the furnace supplying secondary air, which passes into the furnace through a narrow annular gap between the burner tube and the furnace lining.

Abstract: A heat exchanger which includes a core of heat transmitting metal having a plurality of cylindrical passages directed therein. Heat supply means, such as a combustion chamber, is associated with the core and a heat transfer medium, such as water, is introduced into the passages in a spiral manner wherein the medium rotates within the passages to reduce boundary effects improving heat transfer characteristics. The heat exchange is characterized by its ability to efficiently transfer heat in a concise configuration.