FIELD: fuel burning devices.
SUBSTANCE: proposed ejection burner has body with branch pipes for delivery of combustion components, stabilizer, purging ports and injector additionally provided with mixing ejector consisting of body, contraction passage, fuel and oxidizer supply pipe unions; its construction makes it possible to regulate sectional areas of ejecting and ejected flows due to change of penetration of oxidized supply pipe union into contraction passage of ejector. Widening of flow of fuel-and-gas mixture in injector is made in two sections at different taper angles; diameter of spherical cover exceeds diameter of flow section of injector. Purging ports are made in form of three-stage system; first-stage purging ports are made in form of holes in burner body; second-stage purging ports are made in form of row of holes in combustion chamber; their flow sections change by means of regulating ring moved over surface of combustion chamber; third-stage purging port is made in form of coaxial circular passage copying the combustion chamber geometry. Stabilizer tube is twisted in form of cylindrical spiral. Proposed burner makes it possible to improve quality of mixing and evaporability of fuel in injector and to obtain complete combustion of fuel at extended range of stable operation by excess air coefficient.
EFFECT: enhanced efficiency; enhanced stability of combustion.
The invention relates to a device for burning fuel resources and can be used to provide thermal effects in the processes of various technological purposes: disinfection, incineration, heating, drying, thermal treatment in waste management systems, installations for heating air metallurgical furnaces, etc. Prospectively using ejection burner for clean combustion of heavy liquid fuels and oil refining, efficient post-combustion flue and pyrolysis gases.
Known burner is designed for burning liquid or gaseous fuel, comprising a housing, swirl, perforated camera, aperture, fitting compressed air and fuel (see the Vortex effect and its application in engineering /Sat. Materials of all-Union scientific-technical conference. - Kuibyshev, 1988. - Pp.92).
The disadvantage of this design is the low completeness of combustion, the inability to work on different grades of fuel, differing in viscosity (kerosene, diesel fuel) or on the phase state (gas or liquid), and the presence of complex ignition system and a narrow range of stability of the coefficient of excess air.
Closest to the technical nature of the proposed device is a burner, comprising a housing with Petruk the mi supply components burning, the injector, regulator and purge window (SU 1763804 A1, F 23 14/38. Burner, 23.09.92, bull.№35).
The disadvantage of this design is inefficient system of formation and homogenization of the flow of air-fuel mixture, low combustion completeness and reliability of ignition, a narrow range of stable operation, the inability to use the alternative ignition systems.
The technical result of the invention is to improve the quality of mixing, the increase in the degree of esperandote fuel injector, an increase in the completeness of fuel combustion, expansion of the range of stable operation for ejection of the burner by the air excess factor, enabling the use of different ignition systems, improving the efficiency of cooling of the combustion chamber, improving the reliability of ignition of air-fuel mixture, increasing the reliability of the stabilization of the flame front, reducing the startup time of ejection of the burner, improving combustion stability.
The essence of the proposed technical solution is that the ejection burner, comprising a housing with connections for supplying components of combustion, nozzle, regulator and inlet ports, and the nozzle further comprises mixing ejector consisting of a body, confused channel, fittings supply of fuel and oxidant, the construction of which p is positioned to regulate the area of flow sections euchrysea and the ejected streams by changing the depth of penetration fitting feed oxidant confused in the ejector channel. The expansion of the stream of fuel-air mixture in the nozzle occurs at two sites with different angles of taper and the diameter of the spherical cap is larger than the diameter of flow area of the nozzle. Vent window made in the form of a three-tier system, the inlet ports of the first stage are the holes in the burner housing, inlet ports of the second stage is the number of holes in the combustion chamber, the area of passage sections which are changed by moving the adjustment ring on the surface of the combustion chamber, the purge window, the third stage coaxial annular channel, repeating geometry of the combustion chamber. Tube stabilizer is folded in the form of a cylindrical helix.
Mixing ejector in the design of the nozzle is introduced to improve the quality of mixing. To increase the degree of esperandote fuel the expansion of the flow of air-fuel mixture in the nozzle occurs at two sites with different angles of taper and the diameter of the spherical cap is larger than the diameter of the flow part. To increase combustion efficiency and extend the range of stable operation of the air excess factor system vent window made a three. Inlet ports of the first stage are the holes in the burner housing. Their geometry provides the convenience of applying various si is the ignition (rags, small gas burner device). Inlet ports of the second stage is the number of holes in the combustion chamber, the area of passage sections which are changed by moving the adjustment ring on the surface of the combustion chamber. To increase the efficiency of cooling of the combustion chamber purge window, the third stage is a coaxial annular channel, repeating the geometry of the camera. To improve the reliability of ignition and stabilization of the flame front, as well as to reduce the startup time of ejection of the burner and enhance the stability of the combustion tube of the stabilizer is folded in the form of a cylindrical helix.
The invention is illustrated by drawings: figure 1 is a longitudinal section of the ejection of the burner with the recommendations section, figure 2 is a longitudinal section of the nozzle plane, which is the mixing eductor.
Ejection burner (figure 1) contains a pipe for supplying compressed air 1, which is attached to the casing ejection of the burner 2 and is connected to the stabilizer 3 by means of the fitting 4. Tube stabilizer 3 is folded in the form of a cylindrical helix. Combustion air-fuel mixture is carried out in the combustion chamber 5. Vent window made in the form of a three-tier system. The purge box 6 third stage ejection is a coaxial annular channel between the Cam is Roy combustion 5 and the casing 7. Inlet ports 8 of the second stage ejection, representing the number of holes in the combustion chamber 5, the overlap of the adjusting ring 9, which is moved over the surface of the combustion chamber. To put the cross-section shows the inlet ports 10 of the first stage of ejection, which are openings in the case of ejection of the burner 2. The nozzle 11 includes mixing ejector (figure 2), consisting of a housing 12 and confused channel 13 that receives the oxidant through the nozzle 14 and the fuel through the nozzle of the fuel 15. Mixing ejector is mounted tangentially to the chamber tangential input 16. The swirl chamber 17 and the conical chamber 18 have a diffuser sections with different angles of taper. The nozzle ends of the spherical cap 19 of a diameter greater than the diameter of the flow area of the nozzle. The swirl chamber, the conical chamber and a spherical cap are used for shaping and homogenization of the swirling flow of the combustible mixture, after which the combustion chamber 5 through the nozzle diaphragm 20.
Ejection burner works as follows. Compressed air from the compressor through the pipe 1 and the sensor 4 is supplied to the stabilizer 3, made in the form of a heat exchanger, which heats the hot stream of products of combustion and enters the mixing ejector through the nozzle 14. In sosite Inom the ejector air, being an active thread, ejective fuel, which is supplied under pressure from the pressure system through the nozzle of the fuel supply 15, and then formed in a mixing ejector air-fuel mixture in the form of a swirling stream is confused through the channel 13 into the chamber tangential entry nozzle 16. Further mixing and preparation of the combustible mixture occurs in the vortex chamber 17, the conical chamber 18 and the spherical cap 19. Finally prepared for combustion of the fuel-air mixture flowing from the nozzle diaphragm 20 into the combustion chamber 5, where the ignition from an external source into the run mode and the recirculation zones of the hot products of combustion produced near the stabilizer 3 - mode autostabilization. As an external source may be a rags soaked in flammable substance (e.g., kerosene), or small gas burner device. Additional air ejectives in the combustion zone through a three-stage system of the inlet ports 6, 8, 10. Regulation of air flow through the second stage ejection is carried out by moving the adjusting ring 9 on the surface of the combustion chamber 5, in which there is a change in the extent of flow areas of the inlet ports 8. The purge box 6 also serves to cool the combustion chamber 5.
1. Ejection burner, comprising a housing with connections for supplying components of combustion, nozzle, regulator and inlet ports, wherein the nozzle further comprises mixing ejector consisting of a body, confused channel, fittings supply of fuel and oxidant, which design allows you to adjust the square through-ejecting sections and the ejected streams by changing the depth of penetration fitting feed oxidant confused in the ejector channel.
2. Ejection burner according to claim 1, characterized in that the expansion of the flow of air-fuel mixture in the nozzle occurs at two sites with different angles of taper and the diameter of the spherical cap is larger than the diameter of flow area of the nozzle.
3. Ejection burner according to claim 1, characterized in that the inlet ports made in the form of a three-tier system, the inlet ports of the first stage are the holes in the burner housing, inlet ports of the second stage is the number of holes in the combustion chamber, the area of passage sections which are changed by moving the adjustment ring on the surface of the combustion chamber, the purge window, the third stage coaxial ring ka is al, repeating geometry of the combustion chamber.
4. Ejection burner according to claim 1, characterized in that the tube of the stabilizer is folded in the form of a cylindrical helix.
FIELD: power engineering; burning fuel in various thermal plants and heat exchange apparatus.
SUBSTANCE: proposed multi-jet burner has combustion chamber which is closed on one side and is provided with outer and inner perforated tubes; it is made in form of double tube and is provided with distributing unit for smooth distribution of gas-and-air mixture; it is made in form of cone mounted in inner tube with its vertex directed towards gas-and-air mixture flow; ratio of diameter of outer tube to diameter of inner tube is no less than 1.2 and ratio of area of holes of inner perforated tube to area of holes of outer perforated tube is no less than 1.7. proposed burner excludes back-flash and enhances stable operation due to smooth distribution of gas-and-air flow, thus ensuring stable combustion over entire length of burner.
EFFECT: enhanced safety and reliability.
FIELD: burners for combustion of gas.
SUBSTANCE: gas burner comprises air duct with a nozzle, gas duct coaxially mounted inside the air duct, and conical mixer. The end part of the air duct is provided with a row of openings uniformly arranged over the air duct at an acute angle to the axis of the burner. The axis of the opening is directed to the toroidal groove in the inner cylindrical surface of the nozzle. The gas duct is provided with a head with at least six ports which are eccentrically and uniformly arranged with respect to the axis of the burner at an acute angle to the axis of the burner. The ports in the air duct are inclined at an angle of 30-60o to the burner axis. The ports in the gas duct are inclined to the axis of the burner at an acute angle of 30-60o.
EFFECT: enhanced stability of combustion and efficiency.
2 cl, 3 dwg
FIELD: methods of burning hydrocarbon fuel.
SUBSTANCE: proposed method of combustion of hydrocarbon fuel includes separate delivery of fuel and air to burner; fuel is delivered mainly to central area of air flow and is burnt over periphery of flame at excess air mode and at excess of fuel in central area of flame; vapor is fed to central area of flame and field of acoustic oscillations is applied. Burner proposed for burning the gaseous hydrocarbon fuel includes air box, hollow gas manifold with outlet gas holes; it is coaxially arranged inside vapor swirler manifold made in form of hollow cylindrical body with profiled passages and mounted in cylindrical body at radial clearance; cylindrical body has nozzle hole; one end face of vapor swirler is blanked-off and opposite end face is smoothly engageable with nozzle hole in body. Burner for combustion of liquid hydrocarbon fuel includes air box and injector mounted on fuel swirler and vapor swirler which are mounted in cylindrical body at radial clearance; said cylindrical body is provided with nozzle unit made in form of hollow detachable cap with holes over spherical end face; mounted at spaced relation inside this cap is cap of smaller diameter and similar in shape; smaller cap has holes which are coaxial to outer cap; outer cap is provided with additional holes; inner cap is not provided with such holes.
EFFECT: reduction of nitrogen oxide emissions by power-generating boilers at enhanced combustion of fuel.
5 cl, 5 dwg
FIELD: methods of burning pulverized fuel.
SUBSTANCE: proposed method includes preparation of fuel for burning, delivery of fuel, transportation of high-pressure air, mixing air with pulverized fuel and delivery of high-concentrated aeromixture to boiler burners. Transporting air is ozonized before mixing it with pulverized fuel ; part of ozonized fuel is delivered to transport of pulverized fuel and remaining part is delivered autonomous passage of burner to flame root via pipe line.
EFFECT: steady ignition of pulverized fuel; enhanced efficiency of burning process.
FIELD: methods of combustion of hydrocarbon fuels.
SUBSTANCE: the invention is dealt with the method of combustion of a hydrocarbon fuel in a burner. The method of combustion of hydrocarbon fuel in a burner provides, that along the burner external surface a non-corroding technical atmosphere is set in motion, chosen from a group including steam, CO 2 , nitrogen or their mixture. In the capacity of the non-corroding technical aerosphere they use steam. Combustion is carried out at the presence of steam. At least a part of the non-corroding aerosphere is added to the hydrocarbon fuel. The non-corroding aerosphere is used in an amount sufficient to dilute or replace a corroding technical aerosphere existing around the external surface of the burner. The invention allows to avoid a corrosive spraying of the metal and carbonization of the industrial burners exposed to action of the corroding technical aerosphere.
EFFECT: the invention allows to prevent a corrosive spraying of the metal and carbonization of the industrial burners.
5 cl, 1 dwg
FIELD: combustion apparatus using fluent fuel.
SUBSTANCE: burner comprises casing made of a scroll, hollow shaft for fuel supply arranged inside the casing, sucking and exhausting branch pipes for air secured to the casing, nozzle mounted in the conical sleeve, diffuser, and drive. The shaft is mounted for rotation and provided with blades of the fan. The nozzle and conical sleeve are secured to the hollow shaft. The drive is secured to the casing inside the sucking branch pipe. The branch pipe is mounted with a space relation to the casing to provide a space for air flow. The shaft of the drive is hollow to provide fuel flow to the nozzle. The shaft of the drive and hollow shaft of the burner are axially aligned and interconnected. The drive shaft is provided with emulsifier for generating emulsion or suspension and supplying fuel and/or water emulsion and cock for fuel supply.
EFFECT: enhanced efficiency.
2 cl, 1 dwg
FIELD: combustion apparatus for fluent fuels.
SUBSTANCE: method comprises supplying gas to be burnt out from the head of the burner of the torch plant in the combustion zone. The composition of gases is variable. The gas flow rate varies from 1m/s to 3.5 of sound speed due to generating excess static pressure of gas from 0.00001 MPa/cm2 to 3.0 MPa/cm2 by the movable control device. The gas jet is turbulent with a cone angle from 2o to 155o.
EFFECT: enhanced efficiency.
FIELD: methods for burning of solid fuel.
SUBSTANCE: the method for salvaging of trinitrotoluene, whose term of safe storage has expired consists in the fact that trinitrotoluene is fed to the combustion chamber in a melted state (at a temperature of 80 to 90 C) and burnt off in the atmosphere of gaseous fuel-methane not containing oxygen in its composition, as a result of burning due to own oxygen of trinitrotoluene, a great amount of own carbon (soot) is extracted, which then finds industrial application. For burning of trinitrotoluene use is made of an installation including a combustion chamber, pressure regulators for delivery of molten trinitrotoluene and gaseous fuel (methane), electric igniter and a filter for catching soot.
EFFECT: provided safe method for salvaging of trinitrotoluene in the combustion chamber in the atmosphere of gaseous fuel (methane).
2 cl, 1 dwg