Oxygen-oil centrifugal atomizer

 

The invention relates to the combustion of liquid fuel to the injectors to burn oxygen and liquid fuels, and the nozzle has an outer casing containing the first input end, a second output end for exit of the flame combustion and which defines a combustion chamber and a longitudinal X axis; means for supplying fuel to enter the stream of sprayed fuel on the input end and the direction of its outlet end and means for supplying oxygen to the input of oxygen into the input end and for its direction to the outlet end, and means for supplying oxygen has many outlets for oxygen, located on a circle around the fuel and angled radially inwards in the direction of the output end and directed obliquely relative to the X-axis for education thereby converging cone flow of oxygen, which crosses the flow of fuel in the first, located along the flow area, and means for supplying fuel actually has a Central outlet opening having an inner surface in the form of a diverging cone, which forms the fuel as it flows from there, with the inner surface of the diverging cone contains the first surface rachodes is amagosa cone further comprises a second surface diverging cone, adjacent to the first surface of the diverging cone, and the first surface of the diverging cone has a higher angle from the X axis than the second surface of the divergent cone. The invention allows to reduce the amount of Noxin the combustion products. 15 C.p. f-crystals, 9 Il.

The invention relates to a burner for burning liquid fuel and, in particular, but not exclusively, relates to an oil burner having a low allocation of NOxand to the use of vortex technology to ensure complete or substantially complete combustion.

In the application for U.S. patent US-A-3685740 proposed oxygen-oil nozzle type jet nozzle comprising a cylindrical combustion chamber having an open discharge end, and pilot plate with separate holes for oxygen and fuel located at the opposite end of the camera. Serving the longitudinal axis of the oxygen holes elongated in directions converging at one point with the longitudinal axis of the camera, but if this is rejected, non-overlapping position, so that points on the respective axes, which are more closely approach the axis of the camera, determine transversely located ploskostyami parallel to the axis of the chamber for mixing of oxygen and fuel in the plane and the plane of closest approach. Provided by the means for regulating the longitudinal position of the firing plate on the chamber axis and thereby closer approximation of the location of the plate relative to the output of the camera to define the shape emerging from the nozzle of the flame. This nozzle also has a water cooled jacket, which runs until the tip of the nozzle to thereby cooling the tip during the injection. Despite the fact that the nozzle is able to give several different kinds of flame, these kinds of have a tendency to create turbulence, and therefore, they are unstable in some cases. It is also noteworthy that this nozzle design is designed for thorough mixing of the oxygen with the fuel, so that the nozzles were hot, completely burnt in the flame gases. Thus, the required cooling of the tip of the nozzle and, consequently, the overall efficiency of the nozzle should be reduced, because part of the energy produced by the combustion heat will be lost from the cooling water in the cooling jacket. In addition, this nozzle is relatively noisy, and despite the fact that it produces lower amounts of harmful substances such kakutou mixing of oxygen with the fuel, when these secretions is still enough to cause problems.

The present invention is the creation of a liquid-fuel nozzle, which reduces and possibly eliminates the problems associated with the above device.

The problem is solved in that the burner for combustion of oxygen and liquid fuel having an external casing containing the first input end, a second output end for exit of the flame combustion and which defines a combustion chamber and a longitudinal X axis; means for supplying fuel to enter the stream of sprayed fuel on the input end and the direction of its outlet end and means for supplying oxygen to the input of oxygen into the input end and for its direction to the outlet end, and means for supplying oxygen has many outlets for oxygen, located on a circle around the fuel and angled radially inwards in the direction of the output end and directed obliquely relative to the X-axis for education thereby converging cone flow of oxygen, which crosses the flow of fuel in the first above in the course of the flow area, and means for supplying fuel actually has a Central output othersd it follows from thence, thus the inner surface of the diverging cone contains the first surface of the diverging cone adjacent to the Central outlet, according to the invention, the inner surface of the diverging cone further comprises a second surface diverging cone adjacent to the first surface of the diverging cone, and the first surface of the diverging cone has a higher angle from the X axis than the second surface of the divergent cone.

Preferably, the first surface of the diverging cone is the anglefrom 15 to 30orelative to the second surface of the divergent cone, more preferably, from 20 to 25orelative to the second surface of the divergent cone.

The second surface of the diverging cone rejected at an anglefrom 30 to 40othe X-axis, and the angleis between 30 and 35o. Generally, the greater the angle shiftthe more full the length of the flame, and Vice versa.

Outlet openings for supplying oxygen are located radially inward at an angle offrom 5 to 10orelative to the X-axis and KOs the ode mounted on the node injector within the combustion chamber, and the node nozzle capable of moving in the axial direction along the X-axis, allowing thereby to change the axial position of the outlet openings for the fuel and oxygen within the combustion chamber, and a Central outlet for the fuel and the first surface of the diverging cone form part of a single element, which is installed with the possibility of dismantling at the site of injection.

The nozzle also includes a means of venting from the output end towards the exit of the flame burning and vehicle exhaust contains a number of output holes for air, located on a circle and at a distance of around outlets for oxygen, thus the output of the air hole are angled radially inward relative to the X-axis and obliquely relative to the x axis.

Preferably, the outlet openings for air are arranged obliquely relative to the X-axis in the same direction as the outlet for oxygen.

The nozzle includes means for changing the flow rate, which provides a flow of air into and issue from the nozzle, and the supply of oxygen and/or fuel into and issue from the nozzle.

When such a curved tapered surface, according to which rste, moves along the first surface of the diverging cone before you get out of it in the main thread at the point of inflection, where the first surface is transferred to the second, thus improving the mixing of oxygen and liquid fuels. By combining this model of regulation of slow mixing flow and make the flow laminar flow with an internal recirculation (i.e., inside the flame) gaseous products of combustion and oxidants, you may find that this nozzle emits a low amount of CO, NOxand sooty allocations, and the conical nozzle design reduces noise compared to 120 dB in the preceding technical solutions. It is very easy to quickly change the shape of the flame coming out of the nozzle, and, by reducing soot, when using injector (because inside the flame is the recirculation of the gaseous products of combustion and oxidizer due to the effect of turbulence formed soot burns without residue in the last part of the flame) occurs very bright flame. The nozzle generates a flame having two sections of combustion: the first adjacent to the outlet for the fuel which is enriched fuel zone, and second, sleduushie the combustion zone at a distance from the nozzle to prevent overheating of the nozzle and the adjacent refractory parts, eliminating the need for any water cooling. The division of the flame into two areas known as "zoning", and the point at which closed both plots, referred to as "point zoning" (generally, the longer the length of the first zone, compared to the length of the second zone, the greater the zoning and Vice versa). Zoning decreases inversely proportional to the size of the outlet openings for fuel and oxygen.

As mentioned earlier, the first surface of the diverging cone may be at an anglefrom 15 to 30orelative angle of the second surface, more preferably, from 20 to 25o. The change of angleaffect the overall length of the flame, as well as improves or worsens the mixing of fuel with oxygen in accordance with such fuel properties as viscosity, density, temperature, etc.

In a particularly preferred construction, the nozzle has means for changing the axial position of the outlet openings for the fuel and oxygen within the combustion chamber, to thereby change the shape of the discharge from the nozzle. Means to supply fuel and oxygen can be installed, for example, on the site of the injector within the combustion chamber, and a host of injectors I have fuel and oxygen within the combustion chamber.

The outlet for the fuel can be used as the outlet for the oil, and means for supplying oxygen can be used to supply oxygen, air or oxygen-enriched air.

In some cases, applications for combustion is advantageous to additionally submit an air or oxygen-enriched air. This is achieved mainly through the implementation of a variety of output air holes arranged concentrically around the outlet for oxygen, at some distance from them, and outlet openings for air are of the form, to direct the flow of air radially inward relative to the X axis and to the exit for her. Outlet openings for air preferably placed obliquely in the same direction as the outlet for oxygen.

The present invention will be further specifically described by using examples only with reference to the following drawings, in which: Fig.1 shows a view in partial section of an oxygen-fuel injector according to the present invention; Fig. 2 shows a cross section of the node of the nozzle shown in Fig.1; Fig. 3 presents a top view of the node of the nozzle is given in the direction of the arrow a in Fig.2; in Fig.5 presents the next cross section of the node nozzle and shows the associated flow of Fig.6 shows a vertical projection of the end portion of the node of the nozzle in the direction of arrow W in Fig.3; Fig. 7a presents a cross-section of another variant of the node injector according to the present invention; Fig. 7b presents a vertical projection of the end portion of the unit injector of Fig.7a, Fig. 7C is a cross-section of the node nozzle of Fig.7a and 7b, modified for burning gaseous fuel.

Oxy-fuel injector 10 shown as an example in Fig. 1, consists of a tubular or cylindrical casing 12 having a first input end 12A, a second output end 12b to exit a burning flame and the longitudinal axis X and the Central pipe 14 for supplying fuel between the inlet end 12A and an output end 12b is attached to stainless steel node 16 of the nozzle, shown in more detail in Fig.2-6. Pipe 14 for supplying fuel ends almost in the Central exhaust outlet 18 located on the X-axis and having a generally inner surface 20 in the form of a diverging cone, through which the fuel as it enters the centric and the distance around the Central discharge opening 18 for fuel and angled radially inward relative to the output end 12b and obliquely relative to the axis X, for education thereby whirling converging cone of oxygen, which crosses the fuel flow in the first zone Z1 upstream. Next, with reference only to Fig.1, it should be noted that the means for supplying oxygen contains, in addition, the channel 24 formed between the casing 12 and tubing 14 for supplying fuel and oxygen is supplied through the inlet 26 and then goes along the channel 24 so that it approached the rear surface 16A of the node 16 of the nozzle, from which the oxygen is supplied in a variety of outlets 22 which terminate in a point, which is located inside the surface 20. "Normally diverging inner surface 20 actually comprises two, first and second surfaces 20A, 20b divergent cone (see Fig.2), and located along the flow surface 20A has a larger divergence angle relative to the X axis, disposed against the flow surface 20b (the angle between the two surfaces defined by). In Fig. 2 angleapproximately 23oand the angle of deviationsurface 20b from the X-axis is approximately 35o. To the surfaces 20A, 20b of the diverging cone is defined around the circumference of the phantom axis of the outlet openings 22, as shown in the figures).

In the process, at least some portion of the liquid fuel flowing along located along the flow surface 20A before to separate from the place of its connection with the property, against the flow surface 20b, thus slowing it enters the main stream of fuel and improving its mixing with oxygen.

It is evident from Fig.2 shows that each of the outlet openings 22 for oxygen is located radially inward at an angle offrom 5 to 10othe X-axis, resulting in each stream of oxygen is directed radially inward, so that it intersects with the stream of fuel coming out of the Central outlet 18. From the top view in Fig.3 shows that each of the outlet openings 22 for oxygen is obliquely angledconstituting from 20 to 30oabout the axis X. In Fig.4 presents in more detail the trajectory of inlet 22 for supplying oxygen as they pass from the end 16A to the surface 20. The corners of the outlet openings for oxygen, the divergent conical nozzle 20 and the ratio of velocity of the oxygen and fuel are very important and determine �://img.russianpatents.com/chr/8856.gif">surface 20b from the 30o40o(preferably from 30o35o) provides the leaking fuel from the Central discharge opening 18 to receive further smooth movement and a relatively long, narrow, straight jet, having essentially laminar nature of the flow. It completely contrasts with many previous technical solutions, in which the fuel is injected in a manner that causes a turbulent flow regime. A number of holes 22 for oxygen located so as to direct the flow of oxygen radially inward at an angle of5oup to 10othe X-axis, are such to cause the slow mixing of the oxygen with the fuel flow so as to maintain in the zone Z1 mode essentially with a high content of fuel, while in the zone Z2 - mode with reduced content of fuel. The advantage of this device is the appearance by slowing down the mixing area to the bright glow, which begins at approximately 300 to 500 mm from the nozzle, and this prevents overheating of the nozzle and any refractory materials, there are close to vyhodnoy>oWith and, thus, do not need cooling nozzle water. You can maintain a higher temperature, if the use of such alloys, as INCOALLOY, CuproNickel or Monel 400, or if you can provide water cooling, although water cooling can be combined using all nozzles of a material with high thermal conductivity and high corrosion resistance, such as CuproNickel. Enriched fuel zone Z1 extends approximately the length from 300 to 500 mm and ends at the beginning of the second, somewhat larger zone Z2, where the main combustion. The length of the second zone Z2 can be adjusted by changing the angleexhaust nozzle, or node 16 of the nozzle, the inside of the casing or housing 12, which is known from the preceding technical solutions. Although it should be clear that the angleusually must be installed for each design nozzle separately, the position of the node 16 of the nozzle can be changed along the X-axis by actuation of the motor 36 (Fig.1), which in turn moves the pipe 14 of the fuel supply and the node 16 of the nozzle in the axial direction along the axis X. the more involved the node 16 of the nozzle, the more influence this output end 12b is camping. The reduction of turbulence in the result associated with the length of the flame and the change in recycling and, thus, allows to change the shape of the flame to meet the needs of the customer. Obviously, if the node 16 of the nozzle is positioned so that its end is flush with the outlet, the end 12b should be shortened, if there is any interference and shape of the flame is determined largely by the shape, position, and orientation angles themselves outlets for fuel.

Next, a more specific consideration of Fig.3 and 4, it should be clear that the output hole 22 for oxygen also placed obliquely at an anglerelative to the longitudinal axis X, thereby providing a degree of turbulence of the flow of oxygen, which rotates in the direction of arrow R around the Central fuel flow. Angle20o30opreferably from 20oup to 25oprovides sufficient turbulence the effect of recirculation, which should occur in the zone Z2 burning, so that any residual undesirable combustion products recycled and mixed with the residual2for full or there is a flame.

Next, a brief treatment again to Fig.1 it is seen that the actuating mechanism in the form of the engine 36 and the device with the rack and the gear 38, 40 are provided on the remote end of the fuel channel 14 and are capable of moving the above-mentioned channel and node 16 of the nozzle in the axial direction along the X-axis to change the axial position of the outputs 18, 22 for fuel and oxygen within the combustion chamber and, thus, to change the shape of the output system of the nozzle, as is known from the technical solutions. The pumps 34 and 42 in Fig. 1 are used to supply fuel and oxygen into the combustion chamber with the required flow rate and at a speed sufficient to obtain approximately equal velocities of oxygen and fuel at the point of zoning. In practice, the ratio of velocity oxygen:fuel from their respective outlets from 1: 1 to 10:1 will give the same speed at the point of zoning; in the illustrated preferred nozzle is the ratio of the speeds of approximately 2:1.

In the process, presents the nozzle reduces the formation of nitrogen oxides due to the combination of slow mixing of the fuel with oxygen while providing a laminar flow and internal recirculation. Such sposoben fuel length of approximately from 300 to 500 mm, the second longer zone, where the main combustion. Both areas have their own characteristics, and in the first, Z1, there is a very low temperature and weak light, which thus prevents the formation of NOxand overheating of the nozzle and/or neighbouring parts of refractory material, while the neighboring zone Z2 is much more hot. As described above, the length of the second zone Z2 can be adjusted angular position of the holes for oxygen and retraction of the node 16 of the nozzle with the nozzle inside the casing 12. Zone Z2 has a very bright glow, and the main part of the fuel burns completely, at least partially, with the emergence of the effect of recirculation due to the turbulence of the oxygen around the fuel flow. Thus, while preventing the formation of NOx, and educated soot, causing an increase in fluorescence, burns without residue. In addition, this nozzle design can significantly reduce noise levels compared to 120 dB in the preceding technical solutions.

Radial anglethe outlet openings 22 for oxygen identifies a characteristic of the slow mixing and transparent blue, is awarene and appropriate internal recirculation with a sooty flame. The change of angleimpact, and thus determines the regulation of the length of the flame and the formation of NOxwhile angleaffects the width of the flame, glow, and education NOx. The diameter of the Central openings 18 for more fuel than the injectors conventional type and provides at least part of the required ratio of rates of oxygen and fuel. The angle of taperof the 30o40opreferably from about 30o35odefines the complete stabilization of the flame in a wide range of forms of expiration (i.e., deviation), as well as the reduction of industrial noise.

Next, with reference to Fig.7a-7C, in which elements that are identical to those already described are indicated by numbers with a dash, is illustrated by the following variant of the present invention.

Circumference around and at a distance from the outlet openings 22' for oxygen is the number of output holes 50 to supply air or oxygen-enriched air into the combustion zone. Output apertures 50 for air is angled inward relative to the X axis, but at an angle somewhat greater than the second zones Z1 and Z2 (see Fig.5). Output apertures 50 for air, in addition, directed obliquely in the same direction as the outlet openings 22' for oxygen (see Fig.7b), in order to add positive effect of turbulence caused by the oblique arrangement of the outlet openings 22' for oxygen. You can get the same advantage in facilitating the further development of turbulence at an oblique arrangement of the outlet openings 50 for the air in the opposite direction relative to the slanted direction of the outlet openings 22' for oxygen (not shown).

In the variant shown in Fig.7a, the vehicle fuel supply consists of a node cap 52a, on the front end of which is provided the first surface 20A' divergent cone which is coaxial with the axis X and is installed with the possibility of dismantling inside the node 16' nozzles. This provides a particular advantage of the device, as it allows you to quickly remove the node cap 52' for the prevention or repair, or for changing the angle of the first surface of the divergent cone, which may be desirable if you change the type of fuel supplied to the injector. In Fig.7C, for example, shows the site of cap 52b in which the first surface 54 is the same of coal burning gaseous fuel, where there is no need for the presence of inflection at an inner conical surface, to cause the fuel to separate out.

As known from the art, there are tools for changing the flow of fuel, oxygen and air both inside and outside the nozzle, in order to finely adjust the combustion process in a particular use.

In nozzles of conventional type are usually formed of long, lazy flame when applying 21% oxygen (i.e. air), and turbulent, strong, short flame at 100% oxygen. During testing it was found that the nozzle of the present invention remains practically constant characteristics over the entire range of values of oxygen enrichment, especially the length and width of the flame, and visible changes within the range of the oxygen enrichment was detected only for the temperature and luminosity of the flame.

In addition to all the benefits mentioned above, the nozzle in accordance with the present invention is particularly suitable for use in the processes of melting and casting of ferrous and non-ferrous materials such as glass production, and processing steel in General and in electric arc furnaces in particular.

2. Nozzle under item 1, characterized in that the first surface (20A) divergent cone is the anglefrom 15 to 30orelative to the second surface (20b) divergent cone.

3. Nozzle under item 1 or 2, characterized in that the first surface (20A) divergent cone is the anglefrom 20 to 25orelative to the second surface (20b) divergent cone.

4. The injector according to any one of paragraphs. 1-3, characterized in that the second surface (I) divergent cone rejected at an anglefrom 30 to 40orelative to the x axis.

5. Nozzle under item 4, characterized in that the angleis between 30 and 35o.

6. The injector according to any one of paragraphs. 1-5, characterized in that the outlet openings (22) for supplying oxygen are located radially inward at an angle offrom 5 to 10orelative to the x axis.

7. The injector according to any one of paragraphs. 1-5, characterized in that the outlet openings (22) for feeding color is any one of paragraphs. 1-7, characterized in that the feed means(14, 18; 22, 24, 26) fuel and oxygen are mounted on the hub (16) of the nozzle within the combustion chamber, and the node (16) of the nozzle can move in the axial direction along the X-axis, allowing thereby to change the axial position of the outlet openings for the fuel and oxygen within the combustion chamber.

9. Nozzle under item 8, characterized in that the Central outlet opening (18) for fuel and the first surface (20A) divergent cone forms a part of a single element (52a), which is installed with the possibility of dismantling on site (16) of the nozzle.

10. The injector according to any one of paragraphs. 1-9, characterized in that it contains means of air release from the output end (12b) in the direction of exit of the flame burning.

11. Nozzle under item 10, characterized in that the means of air release contains the number of output holes (50) for air, located on a circle and at a distance around the vents (22) for oxygen.

12. The nozzle on p. 11, characterized in that the outlet (50) for air are angled radially inward with respect to axis X.

13. Nozzle under item 11 or 12, characterized in that the outlet (50) for air placed obliquely relative to olno the X-axis in the same direction, that and outlet openings (22) for oxygen.

15. The injector according to any one of paragraphs. 10-14, characterized in that it contains means for changing the flow rate, which provides a flow of air into and issue from the nozzle.

16. The injector according to any one of the preceding paragraphs, characterized in that it contains means for changing the flow rate, which supply oxygen and/or fuel into and issue from the nozzle.

 

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5 cl, 1 dwg

FIELD: power engineering.

SUBSTANCE: spray unit comprises a spray sleeve fixed at the end installed as capable of rotating a driven hollow shaft, the end of which, protruding into a cavity of the spray sleeve, is made as capable of fixation of a spray nut on it, coaxially with a longitudinal axis of the spray sleeve. The driven hollow shaft is made as capable of rotation with frequency of 7500-8000 rpm. The spray sleeve is installed in the cavity of a controlled outlet nozzle (arranged in the form of a cone), arranged as capable of reciprocal displacement along a hub of a fan impeller and fixed with the spray nut, by means of a threaded joint with the possibility to replace the spray sleeve of one length and/or taper with a spray sleeve of another length and/or taper, besides, the controlling outlet nozzle coaxially covers the spray sleeve, and its rear side faces the boiler furnace. The surface of the fan impeller facing the spray sleeve is equipped with a cylindrical ledge coaxial with the axis of rotation of the hollow shaft, at the same time the bottom of the spray sleeve is equipped with a ledge, with a cylindrical bore in the end, arranged with the capability of tight fit on the cylindrical ledge of the fan impeller. In the spray nut wall there are spray holes arranged preferably as equidistant from each other. The rear side of the spray nut is equipped with a circular groove, the outer edge of which is made as capable of tight adjacency to the surface of the spray sleeve bottom. In the bottom of the spray sleeve there is a through hole capable of connecting the circular groove cavity and cavity of the fan 6 impeller jacket. In the volume of the spray nut, in gaps between spray holes, there are through air directing openings arranged as preferably equidistant from each other, and their longitudinal axes are aligned along the axis of symmetry of the spray nut, which matches the longitudinal axis of the driven hollow shaft, preferably at the angle to the surface of the spray sleeve.

EFFECT: invention provides for high-quality spraying of highly viscous heavy fuel with extended duration of burner operation intervals between treatments of the spray sleeve.

1 dwg

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