Nozzle, nozzle wall and compressed air energy storage afterburning chamber

Abstract

The invention discloses a nozzle, a nozzle wall and a compressed air energy storage afterburning chamber. The nozzle includes a plurality of back-spray guns, a plurality of main fuel guns and a central fuel cylinder, a swirl wind tube and a direct current wind tube coaxially arranged from the center to the outside; a spiral atomizing nozzle is arranged at the outlet end of the central fuel cylinder; a swirl blade is arranged at the outlet end of the swirl wind tube in the annular gap between the central fuel cylinder and the swirl wind tube; the outlet end of the direct current wind tube has a tapered section, the small end of the tapered section is connected to the outer wall of the outlet end of the swirl wind tube, and a plurality of circular holes are opened on the tapered section, and the diameter of the outer circular hole is greater than the diameter of the inner circular hole; a plurality of back-spray guns and a plurality of main fuel guns are alternately and evenly arranged on the outer periphery of the direct current wind tube; the outlet of the back-spray gun is located downstream of the tapered section of the direct current wind tube and faces the tapered section; the outlet of the main fuel gun is inclined from the inside to the outside in the radial direction of the direct current wind tube. The nozzle has a simple structure, low investment, and well takes into account the characteristics of combustion chamber temperature, combustion efficiency and pollutant control.

Description

Technical Field

[0001] The invention belongs to the technical field of clean fuel combustion and relates to a nozzle, a nozzle wall and a compressed air energy storage afterburning chamber. Background Art

[0002] At present, under the dual carbon goals, in order to solve the contradiction between supply and demand of new energy power generation, we continue to develop large-scale, long-cycle, low-cost and high-efficiency energy storage technologies. Compressed air energy storage technology is one of the energy storage technologies that meet this requirement. The earliest developed technology is supplementary combustion compressed air energy storage technology, which has the characteristics of large energy storage power and small investment. The nozzle structure of the supplementary combustion chamber in the system is the core component of the system, which directly affects the supplementary combustion temperature, NOx emissions and burnout rate, and also affects the system energy storage efficiency. The current spray gun structure has problems such as low combustion temperature, incomplete combustion and high NOx emissions. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a nozzle, a nozzle wall and a compressed air energy storage and combustion chamber. The nozzle has a simple structure and low investment, and takes into account the characteristics of combustion chamber temperature, combustion efficiency and pollutant control.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A nozzle comprises a plurality of back-spray guns and a plurality of main fuel guns, and a central fuel cylinder, a swirl air cylinder and a direct current air cylinder which are coaxially arranged in sequence from the center to the outside;

[0006] The outlet end of the central fuel cylinder is provided with a spiral atomizing nozzle; the annular gap between the central fuel cylinder and the swirl wind cylinder is provided with a swirl blade at the outlet end of the swirl wind cylinder;

[0007] The outlet end of the DC air duct has a tapered section, the small end of the tapered section is connected to the outer wall of the outlet end of the cyclone air duct, and the tapered section is provided with a plurality of circles of circular holes with different radii; in the radial direction of the tapered section, in two adjacent circles of circular holes, the diameter of the outer circular hole is greater than the diameter of the inner circular hole;

[0008] A plurality of back-spray guns and a plurality of main fuel spray guns are alternately and evenly arranged on the periphery of the DC air cylinder;

[0009] The outlet of the back-spray gun is located downstream of the tapered section of the DC air duct and faces the tapered section;

[0010] The outlet of the main fuel spray gun is inclined from inside to outside in the radial direction of the DC air cylinder.

[0011] Preferably, the inner cavity at the outlet end of the central fuel cylinder is provided with a spiral structure, and the spiral structure and the outlet end of the central fuel cylinder together constitute the spiral atomizing nozzle;

[0012] The overall structure of the spiral structure is a conical structure with a constant pitch and a gradually changing radius;

[0013] The spiral structure is arranged at the outlet end of the central fuel cylinder in such a manner that the large end of the spiral structure is located upstream of the fuel flow direction in the central fuel cylinder, and the small end of the spiral structure is located downstream of the fuel flow direction in the central fuel cylinder.

[0014] Preferably, the top angle of the spiral structure is in the range of 60° to 75°, and the small end of the spiral structure is flush with the outlet end surface of the central fuel cylinder.

[0015] Preferably, the back-spray gun adopts an L-shaped back-spray gun, which includes a first side and a second side that are perpendicular to each other, wherein the first side is parallel to the axis of the DC air duct, and the second side is perpendicular to the axis of the DC air duct and is arranged along the radial direction of the DC air duct, and the outlet of the L-shaped back-spray gun is arranged on the second side; along the axial direction of the DC air duct, the second side does not protrude from the outlet end of the cyclone air duct, and the end of the second side extends to the outer edge of the cyclone air duct.

[0016] Preferably, the second side is provided with two rows of outlets along the length direction of the second side on the side facing the tapered section of the DC air duct, and each row of outlets includes a number of circular outlets arranged at equal intervals; in each row of outlets, the axis of the outlet is perpendicular to the axis of the second side and the angle between the axis of the first side and the axis is 30°~45°.

[0017] Preferably, the main fuel spray gun includes a straight pipe section and an inclined section connected to the outlet of the straight pipe section, the straight pipe section is parallel to the axis of the DC air cylinder, the outlet of the straight pipe section is flush with the outlet of the swirl air cylinder, and the inclined section is inclined from inside to outside in the radial direction of the DC air cylinder.

[0018] Preferably, the angle between the straight pipe section and the axis of the inclined section is 10° to 30°, and the distance from the end of the inclined section to the plane where the cyclone duct outlet is located is 100 to 150 mm.

[0019] The present invention further provides a nozzle wall, the nozzles of the nozzle wall adopt the nozzles of the present invention as described above.

[0020] Preferably, three layers of nozzles are arranged on the nozzle wall, the three layers of nozzles include a central nozzle located in the center, a sub-outer layer of nozzles arranged on the circumference of the central nozzle, and an outermost layer of nozzles arranged on the outer circumference of the sub-outer layer of nozzles; the circle where the central nozzle and the sub-outer layer of nozzles are located is concentric with the circle where the outermost layer of nozzles are located; the sub-outer layer of nozzles contains a number of nozzles arranged at equal intervals, and the outermost layer of nozzles contains a number of nozzles arranged at equal intervals; the injection direction of each nozzle in the sub-outer layer of nozzles is inclined toward the injection direction of the central nozzle, and the intersection angle between the injection direction of each nozzle in the sub-outer layer of nozzles and the injection direction of the central nozzle is 30°~60°, the injection direction of each nozzle in the outermost layer of nozzles is away from the injection direction of the central nozzle, and the intersection angle between the injection direction of each nozzle in the outermost layer of nozzles and the injection direction of the central nozzle is 10°~30°.

[0021] The present invention also provides a compressed air energy storage afterburning chamber, the nozzle wall of the compressed air energy storage afterburning chamber adopts the nozzle wall of the present invention as described above.

[0022] The present invention has the following beneficial effects:

[0023] The gas fuel at the center of the nozzle of the present invention passes through the atomizing device, and the gas fuel is sprayed out of the nozzle in a cone shape to mix with the outer circle swirl wind, ensuring that the central gas fuel is fully mixed with the combustion-supporting air, ensuring the combustion stability of the central area, and a number of back-spray guns for back-spraying gas fuel are arranged along the circumference of the outer ring, and an air outlet (i.e., the circular hole) is designed along the circumference in the back-spraying area of ​​the tapered section of the DC wind tube, and the air outlet gradually expands along the radial direction, on the one hand, the back-sprayed gas fuel of the back-spray gun is burned in a fuel-rich and low-oxygen state to produce a reducing atmosphere CO, thereby realizing a reduction reaction of NOx in the central area and eliminating NOx generation in the central area; on the other hand, due to the structural design of the DC air outlet (i.e., the circular hole), the propagation length of the flame in this area is controlled, and the actual flame length is controllable, ensuring complete combustion in a shorter afterburning chamber; the main fuel spray gun is designed to spray outward, on the one hand, flame diffusion combustion can be realized to reduce NOx emissions, and on the other hand, due to the stable combustion of the flame in the central area of ​​the burner, the high-temperature flue gas in the central area will squeeze out the outermost DC wind and diffuse to the surroundings, providing combustion-supporting air for the main fuel spray gun, ensuring the full combustion of the main fuel. In summary: the design of the nozzle mainly considers two aspects: on the one hand, it ensures combustion stability and realizes stable combustion in the afterburner chamber, thereby ensuring energy storage efficiency; on the other hand, it fully considers the narrow space of the afterburner chamber and the NOx and CO generated during the combustion process, ensuring sufficient combustion while controlling NOx emissions.

[0024] The nozzle wall of the present invention is designed based on the principle of a single nozzle. Two main reasons are considered. On the one hand, the spray guns arranged in the central area are for direct injection combustion, and the secondary layer is for axial inward injection combustion. These two layers can ensure the combustion stability and combustion temperature in the afterburner, thereby ensuring the energy storage efficiency; the outer layer sprays outward along the axial direction to control the flame length and NOx emissions, ensuring efficient and low-pollution combustion in the narrow space of the afterburner. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1( a ) is a schematic diagram of a first overall structure of a nozzle of the present invention; FIG1( b ) is a schematic diagram of a second overall structure of a nozzle of the present invention;

[0026] FIG2 (a) is a front view of the nozzle wall of the present invention; FIG2 (b) is a longitudinal section view of the nozzle wall of the present invention

[0027] FIG3 (a) is a front view of the L-type back-spray gun of the present invention; FIG3 (b) is a bottom view of the L-type back-spray gun of the present invention; FIG3 (c) is a right view of the L-type back-spray gun of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the main fuel spray gun of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the spiral structure of the present invention;

[0030] Among them, 1 is the central fuel cylinder, 2 is the swirl wind cylinder, 3 is the L-type back-spray gun, 3-1 is the L-type back-spray gun outlet, 4 is the main fuel gun, 4-1 is the straight pipe section, 4-2 is the inclined section, 5 is the DC wind cylinder, 5-1 is the tapered section, 6 is the spiral atomizing nozzle, 6-1 is the spiral structure, 7 is the central fuel inlet channel, 8 is the swirl wind inlet channel, 9 is the DC wind inlet channel, 10 is the L-type gun fuel inlet, 11 is the main fuel gun fuel inlet, 12 is the central nozzle, 13 is the sub-outer layer nozzle, 14 is the outermost layer nozzle, and 15 is a circular hole. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] As shown in FIG. 1 (a) and FIG. 1 (b), the nozzle of the present invention comprises a plurality of L-shaped back-spray guns 3 and a plurality of main fuel spray guns 4, and a central fuel cylinder 1, a swirl air cylinder 2 and a DC air cylinder 5 which are coaxially arranged in sequence from the center to the outside; a spiral atomizing nozzle 6 is provided at the outlet end of the central fuel cylinder 1, and the specific form of the spiral atomizing nozzle 6 can be: a spiral structure 6-1 is provided in the inner cavity at the outlet end of the central fuel cylinder 1, and the spiral structure 6-1 and the outlet end of the central fuel cylinder 1 together constitute the spiral atomizing nozzle 6. Specifically, refer to Figure 5The overall structure of the spiral structure 6-1 is a tapered structure with the same pitch and a gradually changing radius. Combined with Figure 1 (a), the spiral structure is arranged at the outlet end of the central fuel cylinder 1 in the following manner: the large end of the spiral structure is located upstream of the fuel flow direction in the central fuel cylinder 1, and the small end of the spiral structure is located downstream of the fuel flow direction in the central fuel cylinder 1. The top angle of the spiral structure ranges from 60° to 75°, which can ensure that the central gas fuel is ejected from the central area with the largest possible atomization and diffusion angle, with the optimal value being 70°. The spiral structure 6-1 is designed mainly to achieve conical diffusion combustion after the central gas fuel is ejected. Figure 5 As shown, half of the top angle (i.e., angle E) is 30°~45°, and the small end of the spiral structure is flush with the outlet end surface of the central fuel cylinder 1; the annular gap between the central fuel cylinder 1 and the swirl wind cylinder 2 is provided with swirl blades at the outlet end of the swirl wind cylinder 2; referring to FIG1(a), the outlet end of the DC wind cylinder 5 has a tapered section 5-1, the small end of the tapered section 5-1 is connected to the outer wall of the outlet end of the swirl wind cylinder 2, and the tapered section is provided with a plurality of circular holes 15 on its circumferences of different radii, as shown in FIG1(a). The figure shows that there are three circles of circular holes 15, each of which is evenly arranged with a plurality of circular holes 15 of the same diameter. From the inner circle to the outer circle, the diameter of the circular holes 15 increases gradually. As shown in FIG. 1 (a) and FIG. 1 (b), a plurality of L-shaped back-spray guns 3 and a plurality of main fuel spray guns 4 are alternately and evenly arranged on the outer periphery of the DC air cylinder 5. FIG. 1 (a) and FIG. 1 (b) show the situation of 6 main fuel spray guns 4 and 6 L-shaped back-spray guns 3. The L-shaped back-spray gun 3 includes a first side and a second side perpendicular to each other. In the embodiment, the first side is parallel to the axis of the DC air cylinder 5, the second side is perpendicular to the axis of the DC air cylinder 5 and is arranged along the radial direction of the DC air cylinder 5, and the outlet of the L-shaped back-spray gun 3 is arranged on the second side; in the axial direction of the DC air cylinder 5, the second side does not protrude from the outlet end of the cyclone air cylinder 2, and the end of the second side extends to the outer edge of the cyclone air cylinder 2; referring to Figures 3 (a) to 3 (c), the second side is provided with two rows of outlets along the length direction of the second side on one side of the tapered section of the DC air cylinder 5, as shown in Figure 3 (b). For example, the upper three L-shaped back-spray gun outlets 3-1 are in one row, and the lower three L-shaped back-spray gun outlets 3-1 are in one row; each row of outlets includes a number of circular outlets arranged at equal intervals, and Figures 3 (a) to 3 (c) show three circular outlets in each row; see Figure 3 (c) In each row of outlets, the axis of the outlet is perpendicular to the axis of the second side and the angle C with the axis of the first side is 30°~45°. The purpose of this angle design is to achieve fuel diffusion in this area and achieve sufficient mixing. The optimal value is 45°. The design of the L-shaped back-spray gun 3 is, on the one hand, to cooperate with the central flame so that the central flame and the flame formed by the L-shaped back-spray gun 3 do not separate from the root of the burner; on the other hand, it plays a role in connecting the central flame with the main flame formed by the main fuel. Refer to Figures 1 (a), 1 (b) and Figure 4The main fuel spray gun 4 includes a straight pipe section 4-1 and an inclined section 4-2 connected to the outlet of the straight pipe section. The straight pipe section 4-1 is parallel to the axis of the DC air duct 5. The outlet of the straight pipe section is flush with the outlet of the swirl air duct 2. The inclined section is inclined from the inside to the outside in the radial direction of the DC air duct 5. Specifically, the angle D between the axis of the straight pipe section 4-1 and the inclined section 4-2 is 10°~30°. The purpose of this angle design is to achieve the outward deflection of the outlet wind direction in this area and provide combustion-supporting air for the main gas spray gun. The optimal value is 20°; the distance between the end of the inclined section 4-2 and the plane where the outlet of the swirl air duct 2 is located is 100~150mm. Based on the mixed combustion distance, in order to achieve mixed combustion of three layers of fuel and each self-combustion air in the axial direction, and then achieve stratified combustion, the optimal value of this distance is 150mm.

[0033] The working principle of the nozzle of the present invention is as follows:

[0034] The central gas fuel passes through the atomizing device, and the gas fuel injection nozzle is conical and mixed with the outer circle swirl wind, ensuring that the central gas fuel is fully mixed with the combustion-supporting air, ensuring the combustion stability of the central area, and a number of L-shaped back-spray gas fuel spray guns are arranged along the circumference of the outer ring, and circumferential air outlets are designed in the back-spray area, and the air outlets are gradually expanded radially. On the one hand, the L-shaped back-spray gas fuel spray guns are burned in a fuel-rich and low-oxygen state to produce a reducing atmosphere CO, thereby realizing the reduction reaction of NOx in the central area and eliminating the generation of NOx in the central area; on the other hand, due to the structural design of the DC air outlet, the propagation length of the flame in this area is controlled, and the actual flame length is controllable to ensure complete combustion in a shorter afterburning chamber; the main fuel spray gun is designed to spray outward, which can realize flame diffusion combustion and reduce NOx emissions on the one hand, and on the other hand, due to the stable flame combustion in the central area of ​​the burner, the high-temperature flue gas in the central area will squeeze out the outermost DC air and diffuse to the surroundings, providing combustion-supporting air for the main fuel spray gun, ensuring the full combustion of the main fuel. In summary: the design of the nozzle mainly considers two aspects: on the one hand, it ensures combustion stability and realizes stable combustion in the afterburner chamber, thereby ensuring energy storage efficiency; on the other hand, it fully considers the narrow space of the afterburner chamber and the NOx and CO generated during the combustion process, ensuring sufficient combustion while controlling NOx emissions.

[0035] The present invention also provides a nozzle wall, and the nozzles of the nozzle wall adopt the nozzles of the present invention as described above. As shown in FIG. 2 (a) and FIG. 2 (b), three layers of nozzles are arranged on the nozzle wall of the present invention, and the three layers of nozzles include a central nozzle 12 located in the center, a sub-outer layer nozzle 13 arranged in the circumferential direction of the central nozzle 12, and an outermost layer nozzle 14 arranged in the circumferential direction of the outer periphery of the sub-outer layer nozzle; the circle where the central nozzle 12 and the sub-outer layer nozzle are located is concentric with the circle where the outermost layer nozzle is located; the sub-outer layer nozzle contains a number of nozzles arranged at equal intervals, and the outermost layer nozzle contains a number of nozzles arranged at equal intervals; as shown in FIG. 2 (b), the spray direction of each nozzle in the sub-outer layer nozzle is inclined toward the spray direction of the central nozzle 12, and the intersection angle between the spray direction of each nozzle in the sub-outer layer nozzle and the spray direction of the central nozzle 12 is 30°~60°, and the intersection angle is mainly for making the L-shaped back spray The spray gun back spray fully diverges and diffuses to achieve full mixing of combustion air and fuel. The optimal value is 45°, which is the same as the angle B in Figure 2 (b). The dotted edge of angle B is perpendicular to the injection direction of the central nozzle 12. The injection direction of each nozzle in the outermost nozzle is away from the injection direction of the central nozzle 12. The intersection angle between the injection direction of each nozzle in the outermost nozzle and the injection direction of the central nozzle 12 is 10°~30°. The design of this angle is mainly for the purpose of achieving outward diffusion combustion of the main fuel and reducing NOx emissions. The optimal value is 20°; the size of this angle is the same as the angle A shown in Figure 2 (b). Of the two sides of angle A, one is perpendicular to the injection direction of the central nozzle 12, and the other is perpendicular to the injection direction of the nozzle in the outermost nozzle.

[0036] The working principle of the nozzle wall of the present invention is as follows: the design is based on the principle of a single nozzle. Two main reasons are considered. On the one hand, the spray guns arranged in the central area are for direct injection combustion, and the secondary layer is for axial inward injection combustion. These two layers can ensure the combustion stability and combustion temperature in the afterburning chamber, thereby ensuring the energy storage efficiency; the outer layer sprays outward along the axial direction to control the flame length and NOx emissions, ensuring efficient and low-pollution combustion in the narrow space of the afterburning chamber. From the above, it can be seen that, on the one hand, the present invention uses the arrangement of the afterburning nozzle to fully diffuse and burn the gas fuel and the combustion-supporting air in the combustion chamber, eliminate local high-temperature areas, and achieve the control of thermal NOx emissions; on the other hand, for a single nozzle, the combustion method based on swirl wind can well control the flame length and the matching of the combustion chamber. At the same time, the nozzle arrangement in the central area can well ensure the temperature of the combustion chamber, provide high-temperature air for the compressed air energy storage technology, and achieve the high-temperature effect of the afterburning while taking into account the effects of pollutant emissions and burnout rate. On the one hand, the present invention can effectively solve the NOx and CO problems generated by the combustion of gas fuel, while taking into account the requirements of the narrow combustion chamber structure and the combustion temperature. On the other hand, the device has a simple structure, low investment cost, and is economical and practical.

Claims

1. A nozzle, characterized in that: It comprises a plurality of back-spraying guns and a plurality of main fuel spraying guns (4), and a central fuel cylinder (1), a swirl air cylinder (2) and a direct current air cylinder (5) which are coaxially arranged in sequence from the center to the outside; The outlet end of the central fuel cylinder (1) is provided with a spiral atomizing nozzle (6); the annular gap between the central fuel cylinder (1) and the swirl wind cylinder (2) is provided with a swirl blade at the outlet end of the swirl wind cylinder (2); The outlet end of the DC air cylinder (5) has a tapered section, the small end of the tapered section is connected to the outer wall of the outlet end of the cyclone air cylinder (2), and the tapered section is provided with a plurality of circles of circular holes (15) on the circumference of a plurality of circles of different radii; in the radial direction of the tapered section, in two adjacent circles of circular holes, the diameter of the outer circular hole (15) is greater than the diameter of the inner circular hole (15); A plurality of back-spray spray guns and a plurality of main fuel spray guns (4) are arranged alternately and evenly on the outer periphery of the DC air cylinder (5); The outlet of the back-spray gun is located downstream of the tapered section of the DC air cylinder (5) and faces the tapered section; The outlet of the main fuel spray gun (4) is inclined from inside to outside in the radial direction of the DC air cylinder (5); The back-spray gun adopts an L-shaped back-spray gun (3), and the L-shaped back-spray gun (3) comprises a first side and a second side which are perpendicular to each other, wherein the first side is parallel to the axis of the DC wind tube (5), the second side is perpendicular to the axis of the DC wind tube (5) and is arranged along the radial direction of the DC wind tube (5), and the outlet of the L-shaped back-spray gun (3) is arranged on the second side; along the axial direction of the DC wind tube (5), the second side does not protrude from the outlet end of the cyclone wind tube (2), and the end of the second side extends to the outer edge of the cyclone wind tube (2); The second side is provided with two rows of outlets along the length direction of the second side on a side facing the tapered section of the DC air duct (5), each row of outlets comprising a plurality of circular outlets arranged at equal intervals; in each row of outlets, the axis of the outlet is perpendicular to the axis of the second side and the angle between the axis of the first side and the axis is 30° to 45°; The main fuel spray gun (4) comprises a straight pipe section and an inclined section connected to an outlet of the straight pipe section, wherein the straight pipe section is parallel to the axis of the DC air cylinder (5), the outlet of the straight pipe section is flush with an outlet of the swirl air cylinder (2), and the inclined section is inclined from inside to outside in the radial direction of the DC air cylinder (5).

2. A nozzle according to claim 1, characterized in that: The inner cavity of the outlet end of the central fuel cylinder (1) is provided with a spiral structure, and the spiral structure and the outlet end of the central fuel cylinder (1) together constitute the spiral atomizing nozzle (6); The overall structure of the spiral structure is a conical structure with a constant pitch and a gradually changing radius; The spiral structure is arranged at the outlet end of the central fuel barrel (1) in such a manner that the large end of the spiral structure is located upstream in the direction of fuel flow in the central fuel barrel (1), and the small end of the spiral structure is located downstream in the direction of fuel flow in the central fuel barrel (1).

3. A nozzle according to claim 2, characterized in that: The top angle of the spiral structure is in the range of 60° to 75°, and the small end of the spiral structure is flush with the outlet end surface of the central fuel cylinder (1).

4. A nozzle according to claim 1, characterized in that: The included angle between the axis of the straight pipe section and the inclined section is 10° to 30°, and the distance between the end of the inclined section and the plane where the outlet of the cyclone duct (2) is located is 100 to 150 mm.

5. A nozzle wall, characterized in that: The nozzle of the nozzle wall is the nozzle described in any one of claims 1-4.

6. A nozzle wall according to claim 5, characterized in that: The nozzle wall is provided with three layers of nozzles, the three layers of nozzles comprising a central nozzle (12) located in the center, a sub-outer layer of nozzles arranged in the circumferential direction of the central nozzle (12), and an outermost layer of nozzles arranged in the circumferential direction of the outer periphery of the sub-outer layer of nozzles; the circle where the central nozzle (12) and the sub-outer layer of nozzles are located is concentric with the circle where the outermost layer of nozzles are located; the sub-outer layer of nozzles comprises a plurality of nozzles arranged at equal intervals, and the outermost layer of nozzles comprises a plurality of nozzles arranged at equal intervals; the spray direction of each nozzle in the sub-outer layer of nozzles is inclined toward the spray direction of the central nozzle (12), and the intersection angle between the spray direction of each nozzle in the sub-outer layer of nozzles and the spray direction of the central nozzle (12) is 30° to 60°; the spray direction of each nozzle in the outermost layer of nozzles is away from the spray direction of the central nozzle (12), and the intersection angle between the spray direction of each nozzle in the outermost layer of nozzles and the spray direction of the central nozzle (12) is 10° to 30°; All the nozzles in the three-layer nozzle are the nozzles described in any one of claims 1 to 4.

7. A compressed air energy storage afterburning chamber, characterized in that: The nozzle wall of the compressed air energy storage afterburning chamber adopts the nozzle wall described in any one of claims 5 or 6.

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