The nozzle for the combustion of heavy fuel
(57) Abstract:Usage: for the combustion of heavy liquid fuels in process furnaces and boilers. The inventive mixed fuel and spray in the annular gap axial cylinder to act on the part of the flow fluctuation generated in the ring resonator. 2 C.p. f-crystals, 1 Il. The invention relates to energy and can be used for the combustion of heavy liquid fuels in process furnaces and boilers.Known burner for combustion of heavy fuels with coaxial pipes for fuel and spray agent, and the fuel nozzle is in the form of an annular slit, inclined in the direction against the flow of the nebulizer (1). The disadvantage of this construction of the nozzle is relatively narrow range of stable operation at variable loads for fuel.Closest to the technical nature of the claimed object is a burner for combustion of heavy fuels containing peripheral and a Central tube forming the Central and annular channels for the passage, respectively, and fuel spray (oxidizer), while the Central pipe has on the side surface of the fuel nozzle the reconstruction of the nozzle is a relatively low efficiency of atomization of fuel and in this regard, a relatively large flow of the spray agent, which ultimately leads to lower steady operation at variable loads for fuel.The aim of the invention is to improve the quality of atomization of the fuel and increase the range of stable operation of the injector.This objective is achieved in that the axis of the tubes are displaced relative to each other by the value of (), which is determined from the relation:
= (Dp- DC) /0,05-0,1/,
where Dpand DC- the diameter of the peripheral and Central pipes, respectively. The fuel nozzle is made larger cross-section of the annular channel and divides the annular channel height from the swirler to the end of the Central pipe at the top (hinbottom (hnzone ) with the ratio of their heights as 3:1, and the peripheral surface of the pipe in the plane of the end caps are made of a ring resonator Hartmann.For stable rotation of the flow in the annular channel of the nozzle, it is advisable on the inner peripheral surface of the pipe in the upper area of the annular channel to perform a spiral groove with outputs in the base of the resonator.To improve the characteristics of the torch nozzle is expedient in the end Pereyaslavl nozzle for the combustion of heavy fuel oil (longitudinal section).The nozzle for the combustion of heavy fuel consists of a peripheral pipe 1 and the Central pipe 2 for feeding the atomizer and fuel, respectively. Moreover, the axis of the pipes 1 and 2 are displaced relative to each other by the value () that is defined from the relation:
= (Dp- DC)/0.05-0.1/,
where Dpand DC- the diameter of the peripheral and Central pipes, respectively. With this displacement of the pipes 1 and 2 relative to each other in longitudinal section of the nozzle is formed of two channels with different cross-sections. In the side surface of the pipe 2 in a larger cross-section of the annular channel is made of the fuel nozzle 3. Below the nozzle 3 in the annular channel swirl 4. At the end of the Central pipe 2 made the cover 5. The nozzle 3 for supplying fuel is located at the height of the annular channel from the swirler 4 until the end of the tube 2 in such a way that divides the volume on the top (hin) and lower (hnarea ratio of the heights hin: hn= 3 : 1. On the surface of the pipe 1 in the plane of the stub 5 is made of a ring resonator Hartmann 6. The surface of the pipe 2 in the upper zone (hin) the annular channel can be provided with an annular groove 7 with outputs in the base of the resonator 6. The end of the pipe 1 provided with a cone 8 with toplami 9 in the base of it.
= (Dp- DC) (0,05oC 0,1),
where Dpand DC- the diameter of the peripheral and Central pipes, respectively,
and the fuel nozzle is made larger cross-section of the annular channel and divides the annular channel at its height from the swirler to the end of the Central pipe on the top of the hinand lower hnareas with the ratio of their heights as 3 : 1, and the peripheral surface of the Oia heavy fuel under item 1, characterized in that on the inner peripheral surface of the pipe in the upper area of the annular channel made a spiral groove with outputs in the base of the resonator.3. The nozzle for the combustion of heavy fuel PP.1 and 2, characterized in that the peripheral end of the tube is placed a cone nozzles at its base.
SUBSTANCE: nozzle has mixing chamber whose section arranged downstream of the radial nozzles of the first sprayer is conical. The nozzles of the third sprayer are arranged over the periphery at the outlet of the conical section of the chamber. The nozzles of the third sprayer are connected with the ring row of the passages of the first sprayer. The nozzles of the third sprayer are mounted at an angle of to the vertical axis of the nozzle and under an angle of to its plane.
EFFECT: enhanced efficiency.
1 cl, 2 dwg
SUBSTANCE: burner is made of well of specified length (up to 650 mm). The fuel flowing through stabilizer of fuel supply enters the fuel supply pipe and then through fuel nozzles to the mixing chamber of the nozzle. The fuel jet impacts on the conical hollow in the working face of the deflector, thus enhancing the spraying of fuel. The compressed steam enters the ring passage defined by the fuel and steam supply pipes. The steam then enters the first (hydraulic) spraing stage of the mixing chamber through the steam nozzles drilled in the swirler radially and tangentially. The mixing chamber is interposed between the hydraulic deflector and exit section of the fuel nozzle. The steam entrains the fuel jet broken down with the deflector and then continues to break it in the second (gas) spraying stage, in the zone around the rod of the hydraulic deflector.
EFFECT: improved quality of spraying.
3 cl, 4 dwg
FIELD: mechanical engineering; gas-turbine engines.
SUBSTANCE: proposed gas-turbine engine has central stage arranged in gas duct of engine from its part arranged higher relative to direction of main gas flow to part lower in direction of main gas flow and provided with exhaust gas cone forming device in direction of main gas flow, and guide arrangement. Gas-turbine engine has group of blades, group of fuel nozzles and group of igniters. Guide arrangement is located in zone of edge of exhaust gas cone-forming device arranged higher relative to direction of main gas flow. Group of blades is located in gas duct out of the limits of central stage. Blades are provided with atomizing guides extending through blades. Fuel nozzles are installed on inner ends of corresponding atomizing guides. Each nozzle is provided with input, output and passage between input and output. Passage has part arranged to direct fuel flow to first part of passage surface located across and widening downwards in direction of flow with subsequent deflection fuel flow by first part of surface and its outlet from nozzle. Igniters are arranged in corresponding atomizing guides for igniting fuel from corresponding fuel nozzle.
EFFECT: provision of reliable lighting up in afterburner, improved recirculation of fuel in flow.
13 cl, 8 dwg
FIELD: power engineering.
SUBSTANCE: coaxial jet nozzle comprises hollow tip that connects the space of one of the fuel components with the combustion zone and bushing that embraces the tip to define a ring space and connects the space of the other fuel component with the combustion zone. The exit section of the tip is provided with the radial grooves so that the periphery of the central jet bounded by the generatrices of the beams is no more than 3s, and the beam length is 2.3-2.5s, where s is the beam thickness.
EFFECT: enhanced completeness of combustion.
1 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: module of burner for gas generator consists of two-step spreader of two-component mixture flow, of two component supplying tubes running from two-step two component mixture spreader, and of face plate of burner, where there pass tubes for supply of two-component mixture. The face plate contains a cooling system designed for plate cooling. Further, the module of the gas generator burner consists of circular nozzles built in the face plate of the burner; also each circular nozzle envelops a corresponding tube supplying two-component mixture. The two-step flow spreader of two component mixture flow contains a main cavity consisting of spreaders of flow of the first step and of secondary cavities diverging from the main cavity on further ends of the spreaders of the first step. Also each secondary cavity comprises the spreaders of flow of the second step. Tubes for supply of two-component mixture run from each secondary cavity on the further ends of the spreaders of the second step flow. The face plate of the burner contains a porous metal partition with nozzles passing through it; the cooling system has a porous metal partition cooled with reagents infiltrating through the porous metal face plate. The face plate of the burner contains a back plate, a front plate and a channel of cooling medium between the back and front plates. The cooling system contains the cooling medium channel. In the cooling system cooling medium flows through this channel to cool the front plate. The front plate contains transition metal. The burner module additionally contains conic elements running through the back plate and the front plate; also each conic element is installed on the end of each tube for supply of two component mixture. Each conic element contains a circular nozzle.
EFFECT: raised efficiency of installation for gasification of carbon containing materials.
20 cl, 8 dwg
FIELD: machine building.
SUBSTANCE: pneumatic burner consists of gas and fuel supplying pipes, fuel nozzle, hollow case and flange. The fuel nozzle consists of two cylinder sections and one conic section. A circular diaphragm with profiled elliptic orifices is installed in the hollow case. The orifices are inclined relative to axis of the fuel nozzle at angle equal to angle of taper of a coaxial conic channel. The fuel nozzle can additionally contain a guiding tip with diffusion hole. The gas supplying pipe is preferably set tangentially to the hollow case. The burner can additionally have the coaxial conic channel formed with the hollow case and the guiding tip with the diffusion hole. Geometry of the coaxial conic channel is preferably made controlled.
EFFECT: reduced operational pressure fall of fuel; increased radial and circumferential uniformity of fuel distribution in spray; control of distribution of drops around diameters.
5 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: atomiser of, primarily, liquid-propellant rocket engine comprises casing with fuel feed adapter. Note here that the latter is arranged inside said case at pylons while its channel is connected with fuel chamber via bores made in said pylons. In includes the sleeve arranged with ring clearance at said case to make circular gaseous oxidiser channel connected with oxidiser chamber via channels in the casing between its wall and fuel feed pylons. Adapter channel is closed at its inlet while its inner chamber communicates with ring gap between adapter and said sleeve via radial bores made at outlet. Note here that sleeve outlet has stepped expansion with its chamber connected with fuel chamber via tangential channels made in sleeve wall. In compliance with one version, sleeve outlet expansion accommodated hollow cylinder making an extension of sleeve inner channel to make ring gap with ring expansion outlet cylindrical surface. Chamber of said dap communicates via tangential bores with fuel chamber. Axial bore is made at adapter end. Stepped expansion is made at adapter outlet. Note here that bores equally spaced in circle and at angle to adapter axis are made at adapter end. Stepped expansion is made at adapter outlet. Note here that bores equally spaced in circle and at angle to adapter axis are made at adapter end located in the plane of sleeve tangential bores.
EFFECT: higher completeness combustion and better mix formation.
5 cl, 11 dwg
SUBSTANCE: fuel tube for a burner, and namely for a gas turbine burner, includes an end that has a surface for nozzles, as well as at least two fuel nozzles. The surface for the nozzles is equipped with splines between the fuel nozzles and is made in the form of an annular conical surface. The splines pass through the above surface perpendicular to the circumferential direction of the annular surface. The end is made in the form of a flattened cone. The side surface of the flattened cone forms the surface for the nozzles.
EFFECT: invention is aimed at increasing the nozzle service life.
7 cl, 3 dwg
FIELD: energy engineering.
SUBSTANCE: device comprises a shell with a shaped inlet and outlet, mounted on the frame, a pilot burner located inside the shell, a mixing head representing two toroid-shaped collectors located on the same axis, in which the pneumatic nozzles connecting them are set, at that one collector is connected to the system of feeding compressed air or steam and the other collector is connected to the hydrocarbon fluid feeding system.
EFFECT: increase in efficiency and completeness of combustion process of hydrocarbon fluid.
2 cl, 4 dwg
FIELD: fire safety.
SUBSTANCE: pneumatic nozzle comprises the fluid and the gas supply systems and the nozzle, the liquid supply system is carried out in two directions comprising the axial liquid supply through the inlet pipe and the confuser and the cylindrical nozzle, connected in series and coaxial with it, and the tangential liquid supply is carried out through the housing in the form of a cylindrical-conical sleeve, coaxial with the cylindrical nozzle, on the cylindrical part thereof the annular vortex chamber with the liquid supply pipe is fixed. Along the annular chamber edges, two rows of inlet fluid tangential channels are provided, each row comprising at least three tangential channels connecting the annular chamber with the cylindrical cavity of the housing, to which the circular plate is coaxially fixed, located perpendicularly to the axis of the annular vortex chamber and rigidly connected to the cylindrical cavity of the housing in its end section, and a slotted nozzle is attached perpendicularly to the circular plate. The slot nozzle is made combined and consisting of two mutually perpendicular rectangular parallelepipeds with throttle through openings of a rectangular cross section, connected with the housing cavity, and the divider of the two-phase flow is attached coaxially to the circular plate, to its peripheral portion, formed as a perforated conical surface surrounding the slotted nozzle with throttle through openings of a rectangular cross section connected to the housing cavity.
EFFECT: increased efficiency of the gas-drop jet formation and expanding its supply area.
2 cl, 2 dwg