摘要:
This invention relates to a pre-mixing type burner suitable for use as a heat source for hot water heater or hot air heater. Conventional premixing type burner of this kind has a flame port section (4) having a multiplicity of slit-like flame ports (5) arranged at a right angle to the wall of a combustion chamber. The flame port (4) has a greater thickness at the central portion than at the end portions and is provided with a flat flame port surface. A passage (2) for supplying secondary air is provided at the central part of the flame port section. This conventional arrangement suffers a disadvantageous poor ignition or generation of resonance noise. If the burner is so designed that a small attached flame is formed at the flame port (5), ignition is improved but resonance noise is produced, and vice versa. The invention was made in view of the problem discussed. Namely, the invention provides a projection (41) on the portion of the flame port surface adjacent to the combustion chamber wall (15) such that, between the projection (41) and the combustion chamber wall (15), there is formed a gap (42) which constitutes a flame port. An attached flame is formed at the portion of the flame port (5) except the portion where the gap (42) is formed, thereby to improve the ignition, while a flame (preferably, a large one) which functions to prevent the perturbation of the attached flame is formed at the gap (42) thereby to prevent the generation of the resonance noise.
摘要:
An apparatus for immediate ignition of waste gases and their smokeless burning which is built into a cylindrical stack, for the flow of waste gases. Near the top of the stack, there is positioned, coaxially, a steam-air pipe for supplying a mixture of steam and air. The steam and air are introduced into the pipe, by means of radial tubes, connected to a circular manifold on the outside of the stack. A circular cover plate or baffle over the steam-air pipe is supported by a plurality of broad strips equally spaced circumferentially, around the periphery of the steam-air pipe. There are a plurality of radial support arms between the stack and the steam-air pipe. These can be made from angle iron of sufficient width, the purpose being to deflect upwardly flow of the annular column of gas, to break it into a plurality of spaced circular segments of gas, the space above the arms protects a stable flame, for instant reignition of the mixture of gas, air and steam.
摘要:
A three-stage liquid fuel burner designed to combust fuel efficiently at a temperature less than 2600.degree. F. to substantially inhibit fixation of polluting nitrogen compounds, the burner including three concentric cylindrical chambers of increasing diameter and staggered length, with provision for gradual introduction of air longitudinally through the chambers for full stoichiometric combustion, fuel being injected into the innermost chamber with air supplied below stoichiometric proportion for in complete combustion, the partially combusted gases passing longitudinally to a secondary outer chamber where air is supplied to approximately stoichiometric proportion, the relatively fully combusted gases passing longitudinally to a tertiary outermost chamber where air is supplied to nearly twice stoichiometric proportion.
摘要:
An elongated burner, which produces a stream of metal oxide soot, comprises three adjacent housings. A centrally disposed housing contains a linear array of orifices for issuing a gas-oxygen mixture to produce a linear flame. Disposed on opposite sides of the central housing are two housings having orifices for issuing into the flame two linear streams of metal halide vapor. Gaps between the central and outer housings permit air to be aspired for stabilizing the flame. Additional flame stabilization may be achieved by providing a shield along the entire perimeter of the halide vapor streams to prevent the random aspiration of air into the sides of the flame.
摘要:
A burner in which steam is utilized to atomize fluid fuels such as natural gas and fuel oils. The burner includes a first tubular housing having a first outlet defined at one end; and a second tubular housing fixedly mounted within the first housing having an end which defines an exit adjacent and enclosed by the first outlet and so mounted to define an annular space between the housings. The burner further includes a plurality of fuel nozzles mounted within the second housing wherein an initial mixture of steam and a fluid fuel is formed and from which the initial mixture is emitted toward the exit and a confluence with air flowing in said annular passage so that a combustible mixture is formed; and a turbulator ring mounted within and at the exit to define a sharp-edged orifice and a narrow annular orifice.
摘要:
A gas fueled singeing burner for singeing treatment of flat textiles having an elongated burner body, preferably of extruded aluminum in two sections which are bolted together, a gas chamber in the body, longitudinally extending burner slits formed by two parallel straight line openings in communication with the gas chamber via a longitudinal gap whose width is equal to the distance between the burner slits and on which is fitted an elongated distributor strip having indented upper portions forming the burner slits. Tightening of the body sections also tightens the distributor slits. Cooling passageways may be provided above the gas chamber and on each side of the distributor refractory, bricks may be bolted to the top on each side of the flame from the slits.
摘要:
Apparatus for producing carbon black in which a plug choke is variably positionable along the length of the first reaction section to vary its length or, at the extreme position of the choke, to eliminate the first section.
摘要:
A process and apparatus for heating a liquid in at least one vertically disposed externally heated tube on the inner surface of which the liquid flows in the form of a trickling film, characterized in that the internal space of the tube is kept under a gas pressure which is higher than the vapor pressure of the liquid in the trickling film.
摘要:
A heat pipe with limited heat transfer capabilities in one direction. The heat pipe, which transfers heat in one direction in normal fashion, also transfers heat in the reverse direction, but only up to a prescribed point, beyond which the reverse heat flow cuts off. It operates because of the use of a limited liquid filling and at least one artery which is closed at the normal evaporator end and open ended at the normal condenser end.