Burners, burner oil guns and burner oil gun nozzles

Abstract

The present invention relates to a burner, a burner oil gun and a burner oil gun nozzle. The burner oil gun nozzle comprises: an air inlet (13); an oil inlet (11); an oil emulsifying section (15), which is connected to the air inlet (13) through a first gas duct (14) and is connected to the oil inlet (11) through a first oil duct (22) so that the oil is emulsified therein; and an oil atomizing section, which is connected to both the oil emulsifying section (15) and the air inlet (13) so that the oil emulsified by the oil emulsifying section (15) is atomized therein. By applying the technical solution of the present invention, the oil is first emulsified in the oil emulsifying section to reduce the viscosity of the oil, and then enters the oil atomizing section for atomization. Therefore, the burner oil gun nozzle can atomize heavy oil with high viscosity well, improves the adaptability of the nozzle to oils of different qualities, and reduces the requirements of the nozzle on the quality of the oil.

Description

Technical Field

[0001] The invention relates to the field of burners, and in particular to a burner, a burner oil gun and a burner oil gun nozzle. Background Art

[0002] In recent years, with the rapid development of infrastructure projects in my country, a large number of asphalt mixing plants have been built across the country. At present, the burners used in asphalt mixing plants can be divided into two types according to the fuel type: gas type and oil type. As for the oil type burner, it is mainly divided into oil supply system, combustion system and air supply system, among which the oil supply system provides continuous and stable heavy oil fuel for the device; the combustion system atomizes the heavy oil into fine particles and ignites them through the ignition device; the air supply system provides air swirl to blow the heavy oil particles and flames to the designated working area to dry the aggregate. However, due to certain defects in the nozzle structure design of the current heavy oil atomizing oil gun, the current oil gun has the following problems: 1. The atomization process is highly dependent on the oil quality. When the oil quality is poor, the atomization effect is difficult to guarantee, and thus coking, carbon deposition and other undesirable phenomena are often formed, which seriously affects the service life of the oil gun; 2. Since the existing structure cannot purge the residual heavy oil in the atomization structure of the oil gun after the flameout, and there is a large amount of dust in the drying drum, the residual heavy oil in the oil gun condenses and absorbs the dust, which will cause blockage in the oil gun structure, seriously affecting the normal use of the oil gun; 3. At present, most oil guns only consider the atomization effect of heavy oil, and pay less attention to the combustion organization of heavy oil. In the combustion process of oil mist, the mixing effect of heavy oil and combustion-supporting air is not ideal, which seriously affects the combustion efficiency of heavy oil; 4. At present, most oil guns pay little attention to the low-nitrogen combustion organization, resulting in a large amount of nitrogen oxides in the high-temperature and oxygen-rich areas during the combustion of heavy oil, posing a serious threat to the environment. Summary of the invention

[0003] The present invention aims to provide a burner, a burner oil gun and a burner oil gun nozzle, so as to improve the problem in the related art that the nozzle has high requirements on the quality of oil.

[0004] According to an invention of an embodiment of the present invention, a burner oil gun nozzle is provided, and the burner oil gun nozzle comprises:

[0005] Air intake;

[0006] Oil inlet department;

[0007] an oil emulsifying portion, which is in communication with the air inlet portion through the first air pore and is in communication with the oil inlet portion through the first oil pore, so that the oil is emulsified therein; and

[0008] The oil atomizing section is connected with the oil emulsifying section and the air inlet section so that the oil emulsified by the oil emulsifying section can be atomized therein.

[0009] In some embodiments,

[0010] The oil emulsification portion includes an annular cavity extending along the circumference of the nozzle;

[0011] The oil atomization part comprises a plurality of atomization channels arranged along the circumference of the annular cavity, and the atomization channels are communicated with the annular cavity.

[0012] In some embodiments, the burner oil gun nozzle further includes a plurality of second oil channels arranged in one-to-one correspondence with the atomizing channels, and the second oil channels include an inlet communicating with the annular cavity and an outlet communicating with the atomizing channels.

[0013] In some embodiments,

[0014] The plurality of atomization channels are all inclined in a clockwise direction relative to the axial direction of the annular cavity and in a direction close to the outlet thereof; or

[0015] The plurality of atomization channels are all inclined in a counterclockwise direction relative to the axial direction of the annular cavity and in a direction close to the outlet thereof.

[0016] In some embodiments, a plurality of partitions arranged along the circumference of the annular cavity are provided in the annular cavity to divide the annular cavity into a plurality of emulsification cavities, and each emulsification cavity is correspondingly provided with at least one atomization channel.

[0017] In some embodiments, the burner oil gun nozzle also includes a gas chamber connected to the air inlet through a second gas channel, the gas chamber is sleeved inside the annular cavity, and the inlet of the atomization channel is connected to the gas chamber.

[0018] In some embodiments, the atomizing channel extends from the gas chamber to the outer surface of the nozzle.

[0019] In some embodiments, the burner oil gun nozzle includes a conical portion, the atomizing channel includes a first atomizing channel and a second atomizing channel, the first atomizing channel and the second atomizing channel both have an atomized oil outlet located on the outer surface of the conical portion, and the atomized oil outlet of the first atomizing channel and the atomized oil outlet of the second atomizing channel are at different positions in the axial direction of the nozzle.

[0020] In some embodiments, the angle between the first atomizing channel and the radial direction of the nozzle is different from the angle between the second atomizing channel and the radial direction of the nozzle.

[0021] In some embodiments, the first atomizing holes and the second atomizing holes are alternately arranged in a circumferential direction of the nozzle.

[0022] According to another aspect of the present invention, a burner oil gun is further provided. The burner oil gun comprises the burner oil gun nozzle mentioned above.

[0023] According to another aspect of the present invention, a burner is further provided. The burner comprises the burner oil gun nozzle mentioned above.

[0024] By applying the technical solution of the present invention, the oil is first emulsified in the oil emulsification section to reduce the viscosity of the oil, and then enters the oil atomization section for atomization. Therefore, the burner oil gun nozzle can atomize heavy oil with higher viscosity very well, thereby improving the nozzle's adaptability to oils of different qualities and reducing the nozzle's requirements for oil quality.

[0025] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic structural diagram of a burner oil gun according to an embodiment of the present invention is shown;

[0028] Figure 2 Shows Figure 1 A schematic diagram of the cross-sectional structure of the burner oil gun at AA shown;

[0029] Figure 3 A schematic diagram of the structure of a burner oil gun nozzle according to an embodiment of the present invention is shown;

[0030] Figure 4 Shows Figure 3 A schematic diagram of the cross-sectional structure at BB of the burner oil gun nozzle shown;

[0031] Figure 5 A schematic diagram of the structure of a burner oil gun nozzle according to an embodiment of the present invention is shown;

[0032] Figure 6 Shows Figure 5 The schematic diagram of the cross-sectional structure at CC of the burner oil gun nozzle shown;

[0033] Figure 7 A schematic structural diagram of a base of a burner oil gun nozzle according to an embodiment of the present invention is shown;

[0034] Figure 8 A schematic diagram of the top view of the base of the burner oil gun nozzle according to an embodiment of the present invention is shown;

[0035] Fig. 9 A schematic diagram of the structure of a base of a burner oil gun nozzle in a bottom view according to an embodiment of the present invention is shown;

[0036] Fig.10 A schematic structural diagram of a burner oil gun nozzle of an embodiment of the present invention is shown;

[0037] Fig.11 Shows Fig.10 A schematic diagram of the cross-sectional structure of the nozzle at DD shown;

[0038] Fig.12 A schematic diagram showing the structure of a burner oil gun nozzle from a bottom up view according to an embodiment of the present invention; and

[0039] Fig.13 A schematic diagram of the top structure of a burner oil gun nozzle according to an embodiment of the present invention is shown.

[0040] In the figure:

[0041] 1. Base; 2. First tube body; 3. Annular cavity; 4. Second tube body; 5. Fastening nut; 6. Base; 7. Nozzle; 8. Oil inlet of oil gun; 9. Oil inlet of oil gun; 10. Atomizing channel; Atomizing channel; 11. Oil inlet part; 12. Second gas channel; 13. Air inlet part; 14. First gas channel; 15. Oil emulsification part; 15a. First annular groove; 15b. Second annular groove; 16. Gas chamber; 16a. First concave cavity; 16b. Second concave cavity; 17. Second oil channel; 18. First atomizing channel; 19. Second atomizing channel; 21. First partition plate; 22. First oil channel; 23. First air inlet; 24. Second air inlet; 31. Second partition plate; 32. Positioning groove; 33. Inlet of second oil channel; 34. Inlet of atomizing channel. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figure 1 The structure diagram of the burner oil gun of the embodiment of the present invention is shown; Figure 2 Shows Figure 1 A schematic diagram of the cross-sectional structure of the burner oil gun at AA shown; Figure 3The schematic diagram of the structure of the burner oil gun nozzle of this embodiment is shown; Figure 4 Shows Figure 3 A schematic diagram of the cross-sectional structure at BB of the burner oil gun nozzle shown; Figure 5 The structure diagram of the burner oil gun nozzle of the embodiment of the present invention is shown; Figure 6 Shows Figure 5 Schematic diagram of the cross-sectional structure at CC of the burner oil gun nozzle shown.

[0044] Combination Figures 1 to 2 As shown, the burner oil gun of this embodiment includes a rod-shaped portion, a burner oil gun nozzle connected to the end of the rod-shaped portion, an oil gun oil inlet 8 and an oil gun air inlet 9 connected to the nozzle. The rod-shaped portion includes a first tube body 2 for circulating oil and a second tube body 4 sleeved outside the first tube body 2. The burner oil gun also includes a fastening nut 5 for fixing the nozzle on the rod-shaped portion.

[0045] The inner cavity of the first tube body 2 is connected to the oil gun oil inlet 8 to transport the oil introduced by the oil gun oil inlet 8 to the burner oil gun nozzle. The annular cavity 3 between the first tube body 2 and the second tube body 4 is connected to the oil gun air inlet 9 to transport the gas introduced by the oil gun air inlet 9 to the nozzle. The burner oil gun also includes a base 1 provided at one end of the rod-shaped portion away from the nozzle. The base 1 is provided with a cavity connected to the oil gun oil inlet 8, and the cavity is connected to the first tube body 2. The base 1 is welded to the above-mentioned rod-shaped portion.

[0046] The burner oil gun also includes an oil inlet pipe, which is welded to the base 1 and communicates with the cavity on the base 1. The port of the oil inlet pipe at one end away from the base 1 forms an oil inlet port 8 of the oil gun.

[0047] The burner oil gun also includes an air inlet pipe, which is welded to the second tube body 4 and communicates with the annular cavity 3 between the second tube body 4 and the first tube body 2. The port of the air inlet pipe away from the end of the second tube body 4 forms an oil gun air inlet 9.

[0048] Combination Figures 3 to 6 as well as Figure 8 As shown, the burner oil gun nozzle includes an air inlet 13, an oil inlet 11, an oil emulsifying portion 15 and an oil atomizing portion. The oil emulsifying portion 15 is connected to the air inlet 13 through the first gas duct 14, and is connected to the oil inlet 11 through the first oil duct 22, so that the oil is emulsified therein. The oil atomizing portion is connected to both the oil emulsifying portion 15 and the air inlet 13, so that the oil emulsified by the oil emulsifying portion 15 is atomized therein.

[0049] In the technical solution of this embodiment, the oil is first emulsified in the oil emulsification section 15 to reduce the viscosity of the oil, and then enters the oil atomization section for atomization. Therefore, the burner oil gun nozzle can atomize heavy oil with higher viscosity very well, thereby improving the nozzle's adaptability to oils of different qualities and reducing the nozzle's requirements for oil quality.

[0050] In this embodiment, the air inlet 13 includes an annular groove, which is provided on the end surface of the nozzle adjacent to one end of the rod-shaped portion, so as to communicate with the annular cavity between the first tube body 2 and the second tube body 4. The oil inlet 11 is provided on the end surface of the nozzle adjacent to one end of the rod-shaped portion, so as to communicate with the inner cavity of the first tube body 2.

[0051] The oil emulsification part 15 includes an annular cavity extending along the circumference of the nozzle; the oil atomization part includes a plurality of atomization channels 10 arranged along the circumference of the annular cavity, and the first atomization channel 10 is connected to the annular cavity.

[0052] The nozzle comprises a base 6 and a spray head 7 arranged on the base 6. The base 6 is arranged at one end of the spray head 7 adjacent to the rod-shaped portion. Figure 7 FIG. 4 shows a schematic diagram of the structure of the base 6 of this embodiment. Figure 8 FIG. 4 shows a schematic diagram of the top view of the base 6 of this embodiment. Fig. 9 FIG. 4 shows a schematic diagram of the bottom view of the base 6 of this embodiment. Fig.10 FIG. 2 shows a schematic diagram of the structure of the nozzle 7 of this embodiment. Fig.11 Shows Fig.10 Schematic diagram of the cross-sectional structure of the nozzle at DD shown. Fig.12 The bottom view of the structure of the nozzle of this embodiment is shown.

[0053] Combination Figures 7 to 12 As shown, the annular cavity of the oil emulsifying portion 15 includes a first annular groove 15a provided on the end surface of the base 6 adjacent to the nozzle 7 and a second annular groove 15b provided on the end surface of the nozzle 7 adjacent to the base 6. Figures 7 to 9 As shown, the first gas channel 14 and the first oil channel 22 are both arranged on the base 6. The gas inlet 13 and the oil inlet 11 are also arranged on the end surface of the base 6 away from the nozzle 7.

[0054] In some embodiments, the base 6 comprises an inverting disc.

[0055] In some embodiments, the width of the first annular groove 15a is 3 to 5 mm. The width of the second annular groove 15b is consistent with the width of the first annular groove 15a.

[0056] A plurality of partitions are arranged along the circumference of the annular cavity to divide the annular cavity into a plurality of emulsification chambers. The annular cavity includes a plurality of emulsification chambers arranged one-to-one corresponding to a plurality of atomization channels 10 . The atomization channels 10 are connected to the corresponding chambers through the second oil channel 17 .

[0057] In some embodiments, the first gas channel 14 and the second oil channel 17 are coaxially arranged so that the gas ejected from the first gas channel 14 can smoothly deliver the oil emulsified in the oil emulsification section 15 into the atomization channel 10 through the second oil channel 17, which is beneficial to reducing flow resistance.

[0058] The partitions include a first partition 21 disposed in the first annular groove 15a and a second partition 31 disposed in the second annular groove 15b. The first partition 21 and the second partition 31 are disposed one-to-one. The first partition 21 and the corresponding second partition 31 are located at the same angle in the circumferential direction of the nozzle.

[0059] like Figure 7 As shown, the first partition plate 21 protrudes from the surface of the base 6 facing the nozzle 7, as shown in FIG. Fig.12 As shown, a positioning groove 32 is provided on the second partition plate 31, and the portion of the first partition plate 21 protruding from the base 7 and facing the nozzle 7 is inserted into the positioning groove 32 on the second partition plate 31 to divide the annular cavity into a plurality of emulsification chambers.

[0060] In some embodiments, the depth of the positioning 32 is 1 to 2 mm. The first baffle 21 protrudes from the surface of the base 6 adjacent to the spray head by 1 to 2 mm.

[0061] Combination Figure 4 , 6 As shown in FIGS. 11 and 12 , the burner oil gun nozzle also includes a plurality of second oil channels 17 arranged one-to-one corresponding to the atomizing channels 10 , and the second oil channels 17 include a second oil channel inlet 33 connected to the annular cavity and a second oil channel outlet connected to the atomizing channel 10 .

[0062] In some embodiments, the second oil channel 17 and the corresponding atomizing channel 10 are located in the same plane. In some embodiments, the angle between the atomizing channel 10 and the radial direction of the nozzle is 40 to 50 degrees. The angle between the first gas channel 14 and the radial direction of the nozzle is 60 to 70 degrees. The diameter of the first gas channel 14 is 1 to 2 mm. The diameter of the atomizing channel 10 is 3 to 6 mm.

[0063] The multiple atomizing channels 10 are all inclined counterclockwise or clockwise relative to the axial direction of the annular cavity along the direction close to its outlet, so that the oil in the multiple atomizing channels 10 is sprayed out in the form of a swirl. When the atomized oil passes through the multiple atomizing channels, it will be sprayed out from the atomizing channels in a spiral shape. The double swirl interactive mixing mode between the oil swirl and the combustion air swirl can improve the mixing degree of the two, reduce the input amount of combustion air, improve the combustion efficiency of the fuel, and reduce nitrogen oxide emissions. In some embodiments, the inclination angle of the atomizing channel 10 relative to the axial direction of the annular cavity is 20 to 30 degrees.

[0064] Combination Figures 3 to 6 as well as Fig.12 As shown, the burner oil gun nozzle further includes a gas chamber 16 , which is sleeved inside the annular cavity, and the inlet 34 of the atomizing channel 10 is in communication with the gas chamber 16 .

[0065] A plurality of atomizing channels 10 are arranged along the circumference of the gas chamber 16. The atomizing channels 10 extend from the gas chamber 16 to the outer surface of the nozzle.

[0066] The nozzle further includes a second gas hole 12 connecting the gas inlet 13 and the gas chamber 16. In some embodiments, a plurality of second gas holes 12 are arranged along the circumference of the gas chamber 16.

[0067] The gas chamber 16 is sleeved in the annular chamber of the oil emulsifying portion 15 , and the distance between the gas chamber 16 and the annular chamber is 3 to 4 mm.

[0068] Combination Figures 7 to 12 As shown, the nozzle includes a base 6 and a nozzle 7 disposed on the base 6. The gas chamber 16 includes a first concave cavity 16a disposed on the surface of the base 6 facing the nozzle 7 and a second concave cavity 16b disposed on the surface of the nozzle 7 facing the base 6. The first concave cavity 16a and the second concave cavity 16b together form the gas chamber 16.

[0069] like Figure 8 and 9 As shown, the air inlet 13 includes a first air inlet 23 communicating with the first air channel 14 and a second air inlet 24 communicating with the second air channel 12 .

[0070] Part of the gas introduced into the air inlet 13 enters the oil emulsification section 15 through the first gas channel 14 , and the other part enters the gas chamber 16 through the second gas channel 12 and then enters each atomization channel 10 arranged along the circumference of the gas chamber 16 .

[0071] The oil introduced into the oil inlet 11 enters the oil emulsification section 15 through the first oil channel 22, and the oil is emulsified under the action of the gas introduced by the first gas channel 14. The emulsified oil enters the atomization channel 10 through the second oil channel 17, and the oil in the atomization channel 10 is atomized under the action of the gas from the gas chamber 16.

[0072] In this embodiment, the extension direction of the atomizing channel 10 intersects with the radial direction of the nozzle. The atomizing channel 10 includes a first atomizing channel 18 and a second atomizing channel 19, and the angle between the second atomizing channel 19 and the radial direction of the nozzle is different from the angle between the first atomizing channel 18 and the radial direction of the nozzle. In some embodiments, the angle between the first atomizing channel 18 and the radial direction of the nozzle is 45 degrees, and the angle between the second atomizing channel 19 and the radial direction of the nozzle is 60 degrees.

[0073] The nozzle is conical, and the first atomizing channel 18 and the second atomizing channel 19 both extend from the gas chamber 16 toward the outer surface of the nozzle. Therefore, since the angle between the second atomizing channel 19 and the radial direction of the nozzle is different from the angle between the first atomizing channel 18 and the radial direction of the nozzle, the atomizing oil outlet of the first atomizing channel 18 located on the outer surface of the nozzle and the atomizing oil outlet of the second atomizing channel 19 located on the outer surface of the nozzle are at different positions in the axial direction of the nozzle, and the atomizing oil outlet of the first atomizing channel 18 and the atomizing oil outlet of the second atomizing channel 19 are also at different positions in the radial direction of the nozzle.

[0074] The atomized oil outlet of the first atomizing channel 18 is farther from the center line of the nozzle in the radial direction of the nozzle than the atomized oil outlet of the second atomizing channel 19. The atomized oil outlet of the second atomizing channel 19 is closer to the top of the nozzle than the atomized oil outlet of the first atomizing channel 18 in the axial direction of the nozzle.

[0075] The atomized oil outlet of the first atomizing channel 18 and the atomized oil outlet of the second atomizing channel 19 constitute two layers of atomized oil outlets. Among them, the oil sprayed from the atomized oil outlet of the first atomizing channel 18 located in the outer layer is oxygen-rich combustion, and a certain amount of harmful gases such as nitrogen oxides will be produced during the combustion process. The oil sprayed from the atomized oil outlet of the second atomizing channel 19 located in the inner layer has less contact with oxygen, so its combustion mode is oxygen-poor combustion, and reducing gases such as carbon monoxide will be produced during its combustion process. Carbon monoxide gas can reduce nitrogen oxides under high temperature conditions to reduce nitrogen oxide emissions and achieve low-nitrogen combustion.

[0076] In some embodiments, the first atomizing holes 18 and the second atomizing holes 19 are alternately arranged in the circumferential direction of the nozzle.

[0077] In some embodiments, the diameter of the atomized oil outlet of the first atomizing channel 18 located in the outer layer is 3 to 5 mm, and the diameter of the atomized oil outlet of the second atomizing channel 19 located in the inner layer is 2 to 3 mm. The two atomized oil outlets of different diameters are alternately arranged in the circumferential direction of the nozzle, thereby achieving the grading of the oil flow rate and avoiding the phenomenon of incomplete combustion.

[0078] The atomizing channel 10 of the burner oil gun nozzle of the present embodiment is connected to the air inlet 13 through two paths, one path is the first air inlet 23, the first gas channel 14, the oil emulsification part 15, the second oil channel 17 and the atomizing channel 10, and the other path is the second air inlet 24, the second gas channel 12, the gas chamber 16 and the atomizing channel 10. After the burner stops burning, the high-pressure gas introduced by the air inlet 13 can purge the oil atomizing part through the above-mentioned two paths to solve the problem of the nozzle being easily blocked.

[0079] The embodiments of the present invention have the following beneficial effects compared with the related art:

[0080] Generally, the atomization of the Y-type oil gun commonly used at present mainly relies on the pressure difference generated by the high-speed flow of the atomizing gas in the atomizing channel to "suck" the heavy oil into the atomizing channel. If the atomized oil quality is poor, due to the high viscosity and poor fluidity of the heavy oil, the difficulty of the heavy oil entering the atomizing channel will increase, and the atomization efficiency and atomization quality of the heavy oil will be difficult to guarantee. In view of this problem, the annular cavity of the oil emulsification part 15 of this embodiment is divided into multiple chambers. The oil is pre-emulsified using multiple chambers, and each emulsification chamber is correspondingly provided with a corresponding first gas channel 14. The first gas channel 14 directly introduces high-pressure air into the emulsification chamber to pre-emulsify the oil flowing through the chamber. The emulsified oil contains a large number of tiny bubbles. These bubbles not only reduce the viscosity of the oil and ensure the oil supply of the atomizing channel 10, but also expand and rupture after the emulsified oil enters the atomizing channel 10 to impact the heavy oil, accelerate the breakage of the oil, improve the atomization quality, and achieve efficient and rapid atomization of heavy oil.

[0081] In addition, partitions are provided between the emulsification chambers corresponding to the atomization channels 10, which avoids the influence between adjacent emulsification chambers, reduces the probability of large bubbles, and makes the oil output of each atomization channel of the oil gun more uniform. In addition, the diameter of the emulsification gas channel is much smaller than that of the atomization gas channel, and the setting of this structure does not have a significant impact on the gas consumption and oil output of the oil gun.

[0082] Generally, when the burner is turned off, a small amount of heavy oil will remain in the atomization structure. The heavy oil remaining inside the structure will cause blockage to the oil gun atomization nozzle after condensation, absorption and dust attachment, which will not only cause great inconvenience to production work but also greatly reduce the service life of the nozzle. However, since the heavy oil passage and the atomization gas passage in the general oil gun structure are two relatively independent passages, the method of using atomization gas to purge the oil gun cannot completely blow out the heavy oil in the atomization structure. The emulsification channel and emulsification chamber proposed in the present invention realize the connection between the heavy oil passage and the atomization gas passage inside the atomization structure. When the atomization gas is used to purge the atomization structure after the equipment is turned off, the remaining heavy oil in the structure can be completely blown out to avoid blockage.

[0083] Generally, heavy oil will be directly sprayed into the combustion chamber after being atomized by the oil gun. The mixing of oil mist and external combustion-supporting gas in the combustion chamber is mainly achieved by the swirl formed by the cyclone disk structure to stir the oil mist. In this mixing process, the oil mist is mainly in a passive mixing state. The mixing degree and movement mode of the oil mist completely depend on the swirl intensity formed by the cyclone disk. In order to improve the mixing degree of the oil mist and the gas, the amount of combustion-supporting air sent by the blower is often more than 2 to 3 times the normal combustion gas consumption. These excessive combustion-supporting air not only takes away a large amount of heat and reduces the utilization rate of the fuel, but also directly causes the oxygen-rich combustion of the heavy oil fuel, increasing the emission of pollutants such as nitrogen oxides. The present invention proposes an atomization channel structure with a spiral angle, through which the oil mist is sprayed in a spiral direction, so that the oil mist is actively mixed with the combustion-supporting air, thereby improving the mixing effect between the oil mist and the combustion-supporting air, improving the combustion efficiency of the heavy oil, and reducing the air delivery of the blower and the emission of nitrogen oxides.

[0084] Generally, the angles between all the atomizing channels of the oil gun and the axis of the oil gun are kept the same, and the atomized oil mist particles are ejected outward in a hollow conical area. Under such conditions, the heavy oil combustion process is a single-stage combustion, and a large amount of nitrogen oxide emissions will be generated under the high temperature and oxygen-rich conditions in the combustion chamber during the combustion process. The present invention proposes a structure in which the atomizing channels and the axis of the oil gun are cross-arranged at two different angles. This arrangement method will cause the oil mist ejected by the oil gun to be in two inner and outer conical areas, wherein the outer conical area is more likely to contact with oxygen during the combustion process, and the combustion in this area is oxygen-rich combustion, and a certain amount of nitrogen oxides will be generated during the full combustion process, while the inner conical area is less in contact with oxygen, and the combustion in this area is oxygen-poor combustion, and a certain amount of incompletely burned carbon monoxide will be generated during the combustion process. Under the high temperature conditions in the combustion chamber, reducing gases such as carbon monoxide can reduce the nitrogen oxides generated in the oxygen-rich area, reducing the generation of nitrogen oxides, and the emission of nitrogen oxides can be greatly reduced by this oxygen-rich and oxygen-poor staged combustion method. In addition, the inner and outer layers of atomization channels also adopt a structure with two different diameters arranged crosswise. This arrangement can control the proportion of the inner and outer layers of fuel, achieve graded fuel distribution, and avoid excessive oil output in the internal oxygen-poor zone and incomplete combustion of heavy oil.

[0085] The above are merely exemplary embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A burner oil gun nozzle, characterized in that: include: Air intake (13); Oil inlet (11); An oil emulsification portion (15) is connected to the air inlet portion (13) through a first gas hole (14), and is connected to the oil inlet portion (11) through a first oil hole (22), so that the oil is emulsified therein; as well as The oil atomization section is in communication with the oil emulsification section (15) and the air intake section (13), so that the oil emulsified by the oil emulsification section (15) is atomized therein. The oil emulsification portion (15) comprises an annular cavity extending along the circumference of the burner oil gun nozzle; The oil atomization portion comprises a plurality of atomization channels (10) arranged along the circumference of the annular cavity, wherein the atomization channels (10) are in communication with the annular cavity. The burner oil gun nozzle also includes a gas chamber (16) connected to the air inlet (13) via a second gas channel (12); the gas chamber (16) is sleeved inside the annular cavity; and the inlet (34) of the atomizing channel (10) is connected to the gas chamber (16).

2. The burner oil gun nozzle according to claim 1, characterized in that: It also includes a plurality of second oil channels (17) arranged in one-to-one correspondence with the atomization channels (10), wherein the second oil channels (17) include a second oil channel inlet (33) connected to the annular cavity and a second oil channel outlet connected to the atomization channel (10).

3. The burner oil gun nozzle according to claim 1, characterized in that: The plurality of atomization channels (10) are all inclined in a clockwise direction relative to the axial direction of the annular cavity and in a direction close to the outlet thereof; or The plurality of atomization channels (10) are all inclined in a counterclockwise direction relative to the axial direction of the annular cavity and in a direction close to the outlet thereof.

4. The burner oil gun nozzle according to claim 1, characterized in that: A plurality of partitions arranged along the circumference of the annular cavity are provided in the annular cavity to divide the annular cavity into a plurality of emulsification cavities, and each of the emulsification cavities is correspondingly provided with at least one atomization channel (10).

5. The burner oil gun nozzle according to claim 1, characterized in that: The atomization channel (10) extends from the gas chamber (16) to the outer surface of the nozzle.

6. The burner oil gun nozzle according to claim 1, characterized in that: The nozzle comprises a conical portion, wherein the atomizing channel (10) comprises a first atomizing channel (18) and a second atomizing channel (19), wherein the first atomizing channel (18) and the second atomizing channel (19) both have an atomizing oil outlet located on the outer surface of the conical portion, and the atomizing oil outlet of the first atomizing channel (18) and the atomizing oil outlet of the second atomizing channel (19) are located at different positions in the axial direction of the nozzle.

7. The burner oil gun nozzle according to claim 6, characterized in that: The angle between the first atomizing hole (18) and the radial direction of the nozzle is different from the angle between the second atomizing hole (19) and the radial direction of the nozzle.

8. The burner oil gun nozzle according to claim 6, characterized in that: The first atomization channels (18) and the second atomization channels (19) are arranged alternately in the circumferential direction of the nozzle.

9. A burner oil gun, characterized in that: A burner oil gun nozzle comprising the burner oil gun nozzle according to any one of claims 1 to 8.

10. A burner, characterized in that: A burner oil gun nozzle comprising the burner oil gun nozzle according to any one of claims 1 to 8.

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