A dense-phase burner for fuel in a thermal power plant

Abstract

The present invention provides a fuel dense-phase burner for a thermal power plant, belonging to the technical field of burners. It includes a main air supply box, a blower, an air inlet box, a flame jet pipe, a pump support, a fuel pump, a feed pipe, a conveying pipe, an atomizer, a feed pipe, a main fuel injection pipe, a main fuel injection head, an auxiliary fuel pipe, an auxiliary combustion fuel injection pipe, an auxiliary combustion fuel injection head, an air pump fixing bracket, an auxiliary air pump, an igniter support and an igniter. A ventilation cavity is arranged inside the main air supply box, and the blower is fixedly installed in communication with the main air supply box. The air inlet box is fixedly installed in communication with the input end of the main air supply box. The double-air combustion system is formed by sending air through the main air supply box and compressing part of the air by the auxiliary air pump to cooperate with the fuel for combustion support, which greatly increases the contact area between the fuel and the air, enables the fuel to burn fully, avoids energy waste, improves the energy-saving performance in use, and a air volume control mechanism is arranged in the air inlet box to control the size of the air intake volume, making it more energy-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and in particular to a fuel dense-phase burner for thermal power plants. Background Art

[0002] A burner is a general term for a device that sprays and mixes fuel and air in a certain way for combustion. At present, for existing combustion equipment on the market, since the fuel mostly has insufficient contact with air in the combustion chamber, the fuel cannot be fully burned, resulting in coking or carbon deposition at the nozzle, which causes the nozzle to be blocked, and further leads to poor energy-saving performance of the burner, resulting in waste of energy. Summary of the Invention

[0003] The purpose of the present invention is to provide a fuel dense-phase burner for thermal power plants. The burner passes air into the main air supply box through a blower and an air inlet box arranged on both sides of the input end of the main air supply box, enters the flame spraying pipe, and forms a dual-air combustion system in cooperation with the compressed air introduced through the auxiliary fuel pipe, increasing the air intake of the combustion reaction, greatly increasing the contact area between the fuel and air, enabling the fuel to burn fully, improving the combustion efficiency, avoiding waste of energy, and improving the energy-saving performance during use.

[0004] The present invention provides a fuel dense-phase burner for thermal power plants, including: a main air supply box, a fuel pump, and a flame spraying pipe. A ventilation cavity is arranged inside the main air supply box. A blower and an air inlet box connected to it are respectively installed on both sides of one end of the main air supply box. The flame spraying pipe is installed at the other end of the main air supply box. An air volume control mechanism for controlling the size of the air intake is installed in the air inlet box. The inlet of the fuel pump is connected to a feed pipe, the outlet of the fuel pump is connected to an atomizer through a delivery pipe, the outlet of the atomizer is connected to a main fuel spraying pipe through a feeding pipe, an auxiliary fuel pipe is connected to the feeding pipe, the auxiliary fuel pipe is connected to an auxiliary combustion fuel spraying pipe, the main fuel spraying pipe and the auxiliary combustion fuel spraying pipe are fixedly installed inside the flame spraying pipe, main fuel spraying heads and auxiliary combustion fuel spraying heads are respectively installed at the ends of the main fuel spraying pipe and the auxiliary combustion fuel spraying pipe, and an igniter is arranged on one side of the main fuel spraying head and the auxiliary combustion fuel spraying head.

[0005] Preferably, the fuel pump is fixedly installed on the surface of a pump support, and the end of the feed pipe away from the fuel pump is externally connected to a fuel tank.

[0006] Preferably, an air pump fixing frame is fixedly installed on the outer side wall of the main air supply box, an auxiliary air pump is fixedly installed on the air pump fixing frame, and the outlet of the auxiliary air pump is connected to the auxiliary fuel pipe.

[0007] Preferably, one end of the main fuel injection pipe and the auxiliary combustion fuel injection pipe are respectively bent and passed through the outer wall of the main air supply box, and are respectively connected to the material supply pipe and the auxiliary fuel pipe. A first one-way valve and a second one-way valve are respectively installed on the material supply pipe and the auxiliary fuel pipe, and the first one-way valve and the second one-way valve are respectively used to control the flow directions of the fuel and the auxiliary fuel.

[0008] Preferably, the air volume control mechanism includes a cylinder bracket, a wind control cylinder, a hinge joint, a wind control shaft and a wind control plate. The cylinder bracket is fixedly installed on the outer wall of the air inlet box, the wind control cylinder is fixedly installed on the cylinder bracket, the output end of the wind control cylinder is hinged to the hinge joint, the wind control shaft is rotatably installed inside the air inlet box, one end of which extends out of the air inlet box and is fixedly installed with the hinge joint, and the wind control plate is fixedly installed on the wind control shaft.

[0009] Preferably, the air volume control mechanism further includes an opening degree meter and an opening degree pointer. The opening degree meter is fixedly installed on the outer wall of the air inlet box, the opening degree pointer is fixedly sleeved on the end of the wind control shaft located outside the air inlet box, and the numerical range of the opening degree meter corresponds to the rotation angle range of the opening degree pointer.

[0010] Preferably, two groups of symmetrically arranged sealing strips are fixedly installed on both side edges of the wind control plate.

[0011] Preferably, an igniter bracket is fixedly installed on the main fuel injection pipe and the auxiliary combustion fuel injection pipe, the igniter is fixedly installed on the igniter bracket, and the ignition point of the igniter is arranged outside the main fuel injection head.

[0012] Preferably, an anti-vibration block, an anti-vibration bracket and a flame deflector are further arranged at the output end of the main fuel injection pipe. Two fixed insertion holes are arranged on the anti-vibration block. The main fuel injection pipe and the auxiliary combustion fuel injection pipe are respectively tightly inserted into the two fixed insertion holes. The anti-vibration bracket is fixedly installed outside the anti-vibration block, the flame deflector is fixedly installed on the anti-vibration bracket, and the outer edge of the flame deflector is in close contact with the inner wall of the flame spraying pipe. A flame diversion port is arranged on the flame deflector.

[0013] Preferably, both the main fuel injection pipe and the auxiliary combustion fuel injection pipe are high-temperature resistant metal pipes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Start the fuel pump, suck fuel through the feed pipe and transport it to the delivery pipe through the fuel pump. Then, the delivery pipe transports the fuel to the atomizer to atomize the fuel. After that, it is shunted through the feed pipe to the main spray pipe and the auxiliary fuel pipe. Then, the fuel in the auxiliary fuel pipe is transported to the auxiliary combustion spray pipe. After that, the fuel in the main spray pipe and the auxiliary combustion spray pipe is ejected through the main spray head and the auxiliary combustion spray head. When starting the fuel pump, start the igniter at the same time. The igniter ignites the fuel ejected from the main spray head and the auxiliary combustion spray head to make the fuel burn. When starting the fuel pump, start the air blower at the same time. The air blower sucks air through the air inlet box, and then the air is transported to the flame pipe through the main air supply box. After that, the air is ejected through the flame pipe. The air flowing through the flame pipe is ejected to the combustion area through the main spray head and the auxiliary combustion spray head, increasing the contact between the combustion reaction and the air. And the outward ejection of the flame is controlled by the air volume control mechanism. During the combustion process, start the auxiliary gas pump to compress a small amount of air by the auxiliary gas pump. Then, the output end of the auxiliary gas pump transports the compressed air to the auxiliary fuel pipe. Then, through the auxiliary fuel pipe, the compressed air entrains the fuel and transports it to the auxiliary combustion spray head. The air and fuel are ejected through the auxiliary combustion spray head, further increasing the contact amount between the combustion reaction and the air, and assisting the complete combustion of the fuel. A dual-air combustion system is formed by the main air supply box and the auxiliary gas pump, greatly increasing the contact between the fuel and the air, making the fuel burn fully, avoiding energy waste, and improving the energy efficiency in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the burner of the present invention;

[0018] Figure 2 Connection structural schematic diagram of the fuel pipeline part of the burner of the present invention;

[0019] Figure 3 is Figure 2 Enlarged structural schematic diagram of area A in;

[0020] Figure 4 is Figure 1 Enlarged structural schematic diagram of area B in;

[0021] Figure 5 Enlarged structural schematic diagram of the air volume control mechanism of the present invention;

[0022] Figure 6This is a schematic diagram of the installation structure of the flame deflector in the present invention.

[0023] Description of the reference numerals:

[0024] 1. Main air supply box; 2. Air blower; 3. Air inlet box; 4. Flame pipe; 5. Pump support; 6. Fuel pump; 7. Feed pipe; 8. Delivery pipe; 9. Atomizer; 10. Feeding pipe; 11. Main spraying pipe; 12. Main spraying head; 13. Auxiliary fuel pipe; 14. Auxiliary combustion spraying pipe; 15. Auxiliary combustion spraying head; 16. Air pump fixing bracket; 17. Auxiliary air pump; 18. Igniter bracket; 19. Igniter; 20. Cylinder bracket; 21. Air control cylinder; 22. Hinge joint; 23. Air control shaft; 24. Air control plate; 25. Anti-vibration block; 26. Anti-vibration support; 27. Flame deflector; 28. First check valve; 29. Second check valve; 30. Opening meter; 31. Opening pointer; 32. Sealing strip. Specific embodiments

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The fuel rich-phase burner of the thermal power plant of the present invention can increase the air intake of the combustion reaction, increase the contact area between the fuel and the air, increase the combustion efficiency, and control the magnitude of the air intake to improve the combustion energy saving.

[0029] As Figures 1 to 6 shown, the above-mentioned fuel rich-phase burner of the thermal power plant includes a main air supply box 1, a fuel pump 6, and a flame jet pipe 4. A ventilation cavity is arranged inside the main air supply box 1. A blower 2 and an air inlet box 3 are respectively installed on both sides of one end of the main air supply box 1 and are in communication with it. The flame jet pipe 4 is installed at the other end of the main air supply box 1. An air volume control mechanism for controlling the magnitude of the air intake is installed in the air inlet box 3. The fuel pump 6 is fixedly installed on the surface of the pump support 5. Its inlet end is connected with a feed pipe 7. The end of the feed pipe 7 far from the fuel pump 6 is externally connected to a fuel tank. The outlet of the fuel pump 6 is connected to an atomizer 9 through a delivery pipe 8. The atomizer 9 is used for atomizing the fuel. The outlet of the atomizer 9 is connected to a main fuel injection pipe 11 through a feed pipe 10. An auxiliary fuel pipe 13 is connected to the feed pipe 10. The auxiliary fuel pipe 13 is in communication with an auxiliary combustion fuel injection pipe 14. A gas pump fixing bracket 16 is fixedly installed on the outer side wall of the main air supply box 1. An auxiliary combustion gas pump 17 is fixedly installed on the gas pump fixing bracket 16. The outlet of the auxiliary combustion gas pump 17 is connected to the auxiliary fuel pipe 13. The main fuel injection pipe 11 and the auxiliary combustion fuel injection pipe 14 are fixedly installed inside the flame jet pipe 4. Main fuel injection heads 12 and auxiliary combustion fuel injection heads 15 are respectively installed at the end parts of the main fuel injection pipe 11 and the auxiliary combustion fuel injection pipe 14. An igniter 19 is arranged on one side of the main fuel injection head 12 and the auxiliary combustion fuel injection head 15. Igniter brackets 18 are fixedly installed on the main fuel injection pipe 11 and the auxiliary combustion fuel injection pipe 14. The igniter 19 is fixedly installed on the igniter bracket 18, and the ignition point of the igniter 19 is arranged outside the main fuel injection head 12.

[0030] In use, start the fuel pump 6. After that, the fuel pump 6 sucks fuel from the fuel tank through the feed pipe 7 and transports it to the delivery pipe 8 through the fuel pump 6. Then, the delivery pipe 8 transports the fuel to the atomizer 9, and the fuel is atomized by the atomizer 9. After that, it is divided and transported to the main spray pipe 11 and the auxiliary fuel pipe 13 through the feed pipe 10. Then, the fuel in the auxiliary fuel pipe 13 is transported to the auxiliary combustion spray pipe 14. After that, the fuel in the main spray pipe 11 and the auxiliary combustion spray pipe 14 is ejected through the main spray head 12 and the auxiliary combustion spray head 15. When starting the fuel pump 6, start the igniter 19 at the same time. The igniter 19 ignites the fuel ejected from the main spray head 12 and the auxiliary combustion spray head 15 to make the fuel burn. When starting the fuel pump 6, start the air blower 2 at the same time. The air blower 2 sucks air through the air inlet box 3, and then the air is transported to the flame pipe 4 through the main air supply box 1. After that, the air is ejected through the flame pipe 4. The air flowing through the flame pipe 4 passes through the combustion area ejected by the main spray head 12 and the auxiliary combustion spray head 15, increasing the contact between the combustion reaction and the air, and controlling the outward jet of the flame through the wind control mechanism. During the combustion process, start the auxiliary gas pump 17 to compress a small amount of air by the auxiliary gas pump 17. After that, the output end of the auxiliary gas pump 17 transports the compressed air to the auxiliary fuel pipe 13. Then, through the auxiliary fuel pipe 13, the compressed air entrains the fuel and transports it to the auxiliary combustion spray head 15, and the air and fuel are ejected through the auxiliary combustion spray head 15, further increasing the contact amount between the combustion reaction and the air, assisting the complete combustion of the fuel. By setting the double-air combustion system, the contact between the fuel and the air is greatly increased, the fuel is fully burned, energy waste is avoided, and the energy-saving performance in use is improved.

[0031] As a preferred solution of this embodiment, one ends of the main spray pipe 11 and the auxiliary combustion spray pipe 14 are respectively bent and pass through the outer wall of the main air supply box 1 near one end of the flame pipe 4, and are respectively connected to the feed pipe 10 and the auxiliary fuel pipe 13. The first one-way valve 28 and the second one-way valve 29 are respectively installed on the feed pipe 10 and the auxiliary fuel pipe 13. The first one-way valve 28 and the second one-way valve 29 are respectively used to control the one-way flow of the atomized fuel in the feed pipe 10 and the fuel and air in the auxiliary fuel pipe 13, avoiding their backflow and improving the use stability.

[0032] As a preferred solution of this embodiment, the air volume control mechanism includes a cylinder bracket 20, a wind control cylinder 21, a hinge joint 22, a wind control shaft 23, and a wind control plate 24. Among them, the cylinder bracket 20 is fixedly installed on the outer wall of one end of the air inlet box 3, the wind control cylinder 21 is fixedly installed on the cylinder bracket 20, the output end of the wind control cylinder 21 is hinged to the hinge joint 22, the wind control shaft 23 is rotatably installed inside the air inlet box 3, one end of which extends out of the air inlet box 3 and is fixedly installed with the hinge joint 22, and the wind control plate 24 is fixedly installed on the wind control shaft 23. When the wind control cylinder 21 is started, the output end of the wind control cylinder 21 is hinged with the hinge joint 22 to drive the hinge joint 22 to swing, then the swinging hinge joint 22 drives the wind control shaft 23 to swing, and further drives the wind control plate 24 to swing. By swinging the wind control plate 24, the air inlet rate at the air inlet box 3 is controlled, and thus the air volume of the equipment is controlled. The air volume is autonomously controlled according to the combustion demand, improving the practicality of use.

[0033] Furthermore, the air volume control mechanism further includes an opening meter 30 and an opening pointer 31. The opening meter 30 is fixedly installed on the outer wall of the air inlet box 3, the opening pointer 31 is fixedly sleeved on the end of the wind control shaft 23 located outside the air inlet box 3, and the numerical range of the opening meter 30 corresponds to the rotation angle range of the opening pointer 31. As the wind control shaft 23 swings, it drives the opening pointer 31 to swing. The swinging opening pointer 31 cooperates with the opening meter 30 to display the opening size of the air inlet of the air inlet box 3 in real time, and thus more intuitively control the air intake volume, improving the practicality of use.

[0034] Even further, two groups of symmetrically arranged sealing strips 32 are fixedly installed on both side edges of the wind control plate 24. By setting the sealing strips 32, when the wind control plate 24 swings to the horizontal state, the sealing strips 32 are in close contact with the inner side wall of the air inlet box 3 to block the air inlet box 3, ensuring the sealing performance when ventilation is not allowed, and improving the practicality of use.

[0035] As a preferred solution of this embodiment, a vibration-proof block 25, a vibration-proof bracket 26, and a flame deflector 27 are further provided at the output end of the main spray pipe 11. Two fixed insertion holes are provided on the vibration-proof block 25, and the main spray pipe 11 and the combustion-supporting spray pipe 14 are respectively tightly inserted into the two fixed insertion holes. The vibration-proof bracket 26 is fixedly installed on the outside of the vibration-proof block 25, the flame deflector 27 is fixedly installed on the vibration-proof bracket 26, and the outer edge of the flame deflector 27 is in close contact with the inner wall of the spray pipe 4. A flame diversion port is provided on the flame deflector 27. Through the cooperation of the vibration-proof block 25, the vibration-proof bracket 26, and the flame deflector 27, the main spray pipe 11 and the combustion-supporting spray pipe 14 can be fixed, preventing the main spray pipe 11 and the combustion-supporting spray pipe 14 from shaking during the fuel injection process and avoiding flame splashing. By providing a flame diversion port on the flame deflector 27, the flame injection direction can be controlled, further avoiding flame splashing and improving the use stability.

[0036] In this embodiment, both the main fuel injection pipe 11 and the combustion-supporting fuel injection pipe 14 are high-temperature resistant metal pipes to prevent the pipe body from being damaged by the high temperature generated during combustion.

[0037] The working principle of the dense-phase burner for power plant fuel of the present invention is as follows:

[0038] During operation, start the fuel pump 6. The fuel pump 6 sucks the fuel in the fuel tank through the feed pipe 7 and transports it to the delivery pipe 8 through the fuel pump 6. Then the delivery pipe 8 transports the fuel to the atomizer 9, and the fuel is atomized by the atomizer 9. After that, it is shunted and transported to the main fuel injection pipe 11 and the auxiliary fuel pipe 13 through the feed pipe 10. Then the fuel in the auxiliary fuel pipe 13 is transported to the combustion-supporting fuel injection pipe 14. After that, the fuel in the main fuel injection pipe 11 and the combustion-supporting fuel injection pipe 14 is ejected through the main fuel injection head 12 and the combustion-supporting fuel injection head 15. When starting the fuel pump 6, start the igniter 19 at the same time. The igniter 19 ignites the fuel ejected from the main fuel injection head 12 and the combustion-supporting fuel injection head 15 to make the fuel burn. When starting the fuel pump 6, start the air blower 2 at the same time. The air blower 2 sucks air through the air inlet box 3, and then the air is transported to the flame jet pipe 4 through the main air supply box 1. After that, the air is ejected through the flame jet pipe 4. The air flowing through the flame jet pipe 4 passes through the combustion area ejected by the main fuel injection head 12 and the combustion-supporting fuel injection head 15, increasing the contact between the combustion reaction and the air, and controlling the outward jet of the flame through the wind force. During the combustion process, start the combustion-supporting gas pump 17 to compress a small amount of air by the combustion-supporting gas pump 17. Then the output end of the combustion-supporting gas pump 17 transports the compressed air to the auxiliary fuel pipe 13. Then, through the auxiliary fuel pipe 13, the compressed air entrains the fuel and transports it to the combustion-supporting fuel injection head 15. The air and fuel are ejected through the combustion-supporting fuel injection head 15, further increasing the contact amount between the combustion reaction and the air and assisting the complete combustion of the fuel.

[0039] For the dense-phase burner for power plant fuel of the present invention, its installation method, connection method or setting method are all common mechanical methods, and any implementation that can achieve its beneficial effects can be carried out.

[0040] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel dense-phase burner for a thermal power plant, characterized in that, Including: A main air supply box (1), a fuel pump (6) and a flame spraying pipe (4). There is a ventilation cavity inside the main air supply box (1). On both sides of one end of the main air supply box (1), a blower (2) and an air inlet box (3) connected to it are respectively installed. The flame spraying pipe (4) is installed at the other end of the main air supply box (1). An air volume control mechanism for controlling the magnitude of the air intake volume is installed in the air inlet box (3). The inlet of the fuel pump (6) is connected with a feed pipe (7). The outlet of the fuel pump (6) is connected to an atomizer (9) through a delivery pipe (8). The outlet of the atomizer (9) is connected to a main fuel injection pipe (11) through a fuel delivery pipe (10). A secondary fuel pipe (13) is connected to the fuel delivery pipe (10). The secondary fuel pipe (13) is connected to a secondary combustion fuel injection pipe (14). An air pump fixing bracket (16) is fixedly installed on the outer side wall of the main air supply box (1). An auxiliary air pump (17) is fixedly installed on the air pump fixing bracket (16). The outlet of the auxiliary air pump (17) is connected to the secondary fuel pipe (13). The main fuel injection pipe (11) and the secondary combustion fuel injection pipe (14) are fixedly installed inside the flame spraying pipe (4). Main fuel injection nozzles (12) and secondary combustion fuel injection nozzles (15) are respectively installed at the end parts of the main fuel injection pipe (11) and the secondary combustion fuel injection pipe (14). An igniter (19) is arranged on one side of the main fuel injection nozzle (12) and the secondary combustion fuel injection nozzle (15).

2. The dense-phase burner for fuel in a thermal power plant according to claim 1, wherein The fuel pump (6) is fixedly installed on the surface of a pump support (5). The end of the feed pipe (7) far from the fuel pump (6) is externally connected to a fuel tank.

3. The dense-phase burner for fuel in a thermal power plant according to claim 1, characterized in that, One ends of the main fuel injection pipe (11) and the secondary combustion fuel injection pipe (14) respectively bend through the outer side wall of the main air supply box (1) and are respectively connected to the fuel delivery pipe (10) and the secondary fuel pipe (13). A first one-way valve (28) and a second one-way valve (29) are respectively installed on the fuel delivery pipe (10) and the secondary fuel pipe (13). The first one-way valve (28) and the second one-way valve (29) are respectively used to control the flow directions of the fuel and the secondary fuel.

4. The fuel dense-phase burner for thermal power plant according to claim 1, characterized in that, The air volume control mechanism includes a cylinder bracket (20), a wind control cylinder (21), a hinge joint (22), a wind control shaft (23) and a wind control plate (24). The cylinder bracket (20) is fixedly installed on the outer wall of the air inlet box (3). The wind control cylinder (21) is fixedly installed on the cylinder bracket (20). The output end of the wind control cylinder (21) is hinged to the hinge joint (22). The wind control shaft (23) is rotatably installed inside the air inlet box (3). One end of it extends out of the air inlet box (3) and is fixedly installed with the hinge joint (22). The wind control plate (24) is fixedly installed on the wind control shaft (23).

5. The dense-phase burner for fuel in a thermal power plant according to claim 4, wherein The air volume control mechanism further includes an opening meter (30) and an opening pointer (31). The opening meter (30) is fixedly installed on the outer wall of the air inlet box (3). The opening pointer (31) is fixedly sleeved on the outer end of the air control shaft (23) located outside the air inlet box (3), and the numerical range of the opening meter (30) corresponds to the rotation angle range of the opening pointer (31).

6. The dense-phase burner for fuel in a thermal power plant according to claim 4, characterized in that, Two sets of symmetrically arranged sealing strips (32) are fixedly installed on the two side edges of the air control plate (24).

7. The fuel rich-phase burner for thermal power plant according to claim 1, characterized in that, An igniter bracket (18) is fixedly installed on the main fuel injection pipe (11) and the auxiliary combustion fuel injection pipe (14). The igniter (19) is fixedly installed on the igniter bracket (18), and the ignition point of the igniter (19) is set outside the main fuel injection head (12).

8. The fuel dense-phase burner for a thermal power plant according to claim 1, characterized in that, The output end of the main fuel injection pipe (11) is further provided with an anti-vibration block (25), an anti-vibration bracket (26) and a flame deflector (27). Two fixed insertion holes are provided on the anti-vibration block (25). The main fuel injection pipe (11) and the auxiliary combustion fuel injection pipe (14) are respectively tightly inserted into the two fixed insertion holes. The anti-vibration bracket (26) is fixedly installed on the outside of the anti-vibration block (25). The flame deflector (27) is fixedly installed on the anti-vibration bracket (26), and the outer edge of the flame deflector (27) is in close contact with the inner wall of the flame spraying pipe (4). A flame diversion port is provided on the flame deflector (27).

9. The fuel dense-phase burner for thermal power plants according to claim 1, characterized in that, Both the main fuel injection pipe (11) and the auxiliary combustion fuel injection pipe (14) are high-temperature resistant metal pipes.

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