Low nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner

Abstract

The present invention relates to the technical field of pulverized coal burners, and discloses a low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner, including a burner outer tube. The low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner connects the burner outer tube and the radial air duct through a connecting block and an electric push rod, and the electric push rod is remotely controlled to work, so that the output end of the electric push rod can drive the radial air duct to move left and right as a whole on the inner side of the burner outer tube. The air duct between the radial air duct and the burner outer tube passes swirl wind, so the movement of the radial air duct increases or decreases the cross-sectional area of ​​the swirl wind duct, thereby adjusting the wind pressure and wind speed of the air outlet, and the micro-motor drives the driving gear to rotate, so that the driven gear rotates, and the driven gear drives the connecting rod to rotate, and then drives multiple connecting rods and swirl plates to rotate as a whole, and the angle of the swirl plate is adjusted, so that the inclination angle of the swirl wind is adjusted, and the purpose of convenient adjustment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pulverized coal burners, in particular to a low-nitrogen supersonic energy-saving automatic regulating six-air-duct pulverized coal burner. Background Art

[0002] Pulverized coal burner refers to equipment that can make pulverized coal burn fully in a short time and produce high-temperature vortex. Low nitrogen refers to the production of lower nitrogen oxide gas, and supersonic refers to accelerating the combustible mixture to a supersonic state, which can obtain a large flare, high smoke temperature, high smoke density, low smoke loss and strong convection.

[0003] There are various types of pulverized coal burners on the market. For example, Chinese patent CN 102679339 B mentions a medium-frequency heating stable combustion pulverized coal burner, which includes a pulverized coal burner shell, a non-metallic pulverized coal partition plate, a metal pulverized coal partition plate, a medium-frequency heating coil, a second- and third-level pulverized coal partition plate, a secondary air box and a secondary air cyclone. A primary air inlet is arranged at the upstream position of the pulverized coal burner shell, a non-metallic pulverized coal partition plate and a second- and third-level pulverized coal partition plate are arranged in the middle of the pulverized coal burner shell from upstream to downstream, a metal pulverized coal partition plate is arranged inside the non-metallic pulverized coal partition plate, and a medium-frequency heating coil is arranged between the non-metallic pulverized coal partition plate and the metal pulverized coal partition plate, and the medium-frequency heating coil is connected to the terminal. A secondary air box is arranged at the downstream position outside the pulverized coal burner shell, and a secondary air inlet is arranged on the secondary air box. A secondary air swirler is arranged at the outlet of the secondary air box to increase the stability and adaptability of the pulverized coal burner. However, the device is not convenient for adjusting the air volume of various winds, which makes it difficult to control the length and size of the flame. In addition, there is no mounting structure on the outside of the burner, and it can only be supported by welding on a simple bracket. It cannot be installed and disassembled, which makes subsequent maintenance difficult. Therefore, a low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner is proposed to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a low-nitrogen supersonic energy-saving automatically adjustable six-air duct pulverized coal burner, which has the advantages of convenient adjustment and convenient disassembly and assembly, and solves the problem that the device is inconvenient to adjust the air volume of various winds, resulting in difficulty in controlling the length and size of the flame, and there is no mounting structure on the outside of the burner, so it can only be supported by welding on a simple bracket, and cannot be installed and disassembled, resulting in difficulty in later maintenance.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of convenient adjustment and convenient disassembly and assembly, the present invention provides the following technical scheme: a low-nitrogen supersonic energy-saving automatic adjustment six-air-channel pulverized coal burner, comprising an outer tube of a burner, a radial air duct is movably installed on the inner side of the outer tube of the burner, a pulverized coal pipe is movably installed on the inner side of the radial air duct, a central tube is movably installed on the inner side of the pulverized coal pipe, a fuel pipeline is movably installed on the inner side of the central tube, the radial air duct, the pulverized coal pipe and the outer sides of the central tube are all fixedly connected with an air inlet pipe, the outer side of the outer tube of the burner is fixedly connected with an axial air duct, the outer side of the axial air duct is fixedly installed with an electric valve, the tops of the outer tube of the burner and the radial air duct are fixedly installed with connecting blocks, electric push rods are fixedly connected between the connecting blocks, a number of fixed blocks are fixedly installed on the inner side wall of the radial air duct, a rotating rod is movably installed between two of the fixed blocks, and a swirl plate is fixedly installed on the outer side of the rotating rod A connecting rod is fixedly connected between the swirl sheets, a driven gear is fixedly installed on the outside of the connecting rod, a micro motor is fixedly installed inside the pulverized coal pipe, a driving gear is fixedly connected to the output end of the micro motor, the driving gear and the driven gear are meshed with each other, a plug plate is fixedly installed on the outside of the burner outer tube, a mounting seat is movably installed at the bottom of the burner outer tube, a slot is opened on the top of the mounting seat, a placement slot is opened on the top of the mounting seat, a rubber pad is fixedly installed inside the placement slot, a support block is movably installed inside the slot, a movable rod is fixedly installed at the bottom of the support block, a movable plate is fixedly installed at the bottom of the movable rod, a telescopic rod is fixedly installed at the bottom of the movable plate, a hydraulic cylinder is fixedly installed at the bottom of the movable plate, mounting plates are fixedly installed on the left and right sides of the plug plate, and fixing bolts are fixedly installed on the top of the mounting plate.

[0008] Preferably, the burner outer tube, radial air duct, pulverized coal tube, central tube and fuel pipeline are all hollow cylinders with two sides missing.

[0009] Preferably, the output end of the electric push rod is fixedly connected to the right connecting block, and the mounting seat is a rectangular parallelepiped with a hollow interior.

[0010] Preferably, every two of the fixing blocks form a group, and several groups of the fixing blocks are evenly distributed on the inner side of the radial air duct in a ring array.

[0011] Preferably, the number of the plug plates is two, and the two plug plates are symmetrically distributed on the left and right sides of the central axis of the burner outer tube.

[0012] Preferably, the placement groove is semicircular in shape, and the diameter of the placement groove is matched with the outer diameter of the burner outer tube.

[0013] Preferably, the bottom of the insert plate contacts the top of the support block, and the hydraulic cylinder is located on the bottom wall of the inner cavity of the mounting seat.

[0014] Preferably, the telescopic rod consists of a sleeve and a sleeve rod, and the sleeve rod is movably mounted inside the sleeve.

[0015] Preferably, the tops of the mounting plate and the mounting seat are each provided with a plurality of screw holes, and the fixing bolts penetrate through the screw holes and extend into the interior of the mounting seat.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner, which has the following beneficial effects:

[0018] 1. The low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner connects the burner outer tube and the radial air duct through two connecting blocks and an electric push rod. The electric push rod is remotely controlled to work, so that the output end of the electric push rod can drive the radial air duct to move left and right as a whole on the inner side of the burner outer tube. The air duct between the radial air duct and the burner outer tube passes into swirl wind. Therefore, the movement of the radial air duct increases or decreases the cross-sectional area of ​​the swirl wind duct, so as to adjust the wind pressure and wind speed at the air outlet. The micro motor drives the driving gear to rotate, so that the driven gear rotates, and the driven gear drives the connecting rod to rotate, thereby driving multiple connecting rods and swirl plates to rotate as a whole. The angle of the swirl plate is adjusted, so that the inclination angle of the swirl wind is adjusted, thereby achieving the purpose of convenient adjustment.

[0019] 2. The low-nitrogen supersonic energy-saving automatic adjustment six-duct pulverized coal burner is installed by placing the outer tube of the burner in the placement groove in the mounting seat, and the plug plate on the outside of the outer tube of the burner is also inserted into the slot. The plug plate is supported by the support block, and then the fixing bolts on the mounting plate are tightened to complete the installation. When disassembling, the bolts are unscrewed, and the movable plate is driven to rise by the hydraulic cylinder. The movable plate then drives the movable rods on both sides to rise, and then pushes the support block upward, and pushes the plug plate out of the slot, so that the outer tube of the burner is automatically moved out without manual lifting, thereby achieving the purpose of convenient disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner proposed by the present invention;

[0021] Figure 2 A top view of the installation base of the low-nitrogen supersonic energy-saving automatic adjustment six-air-duct pulverized coal burner proposed by the present invention;

[0022] Figure 3 This is a left view of the burner outer tube of the low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner proposed by the present invention;

[0023] Figure 4The low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner proposed by the present invention Figure 3 Enlarged view of point A in the middle.

[0024] In the figure: 1 burner outer tube, 2 radial air duct, 3 pulverized coal pipe, 4 center tube, 5 fuel oil pipeline, 6 air inlet pipe, 7 axial air duct, 8 electric valve, 9 connecting block, 10 electric push rod, 11 fixed block, 12 rotating rod, 13 swirl plate, 14 connecting rod, 15 driven gear, 16 micro motor, 17 driving gear, 18 plug board, 19 mounting seat, 20 slot, 21 placement slot, 22 rubber pad, 23 support block, 24 movable rod, 25 movable plate, 26 telescopic rod, 27 hydraulic cylinder, 28 mounting plate, 29 fixing bolt. DETAILED DESCRIPTION

[0025] 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, not all of the embodiments. 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.

[0026] See also Figure 1-4The invention discloses a low-nitrogen supersonic energy-saving automatic regulating six-air-channel pulverized coal burner, comprising a burner outer tube 1, a radial air duct 2 is movably installed on the inner side of the burner outer tube 1, a pulverized coal pipe 3 is movably installed on the inner side of the radial air duct 2, a central tube 4 is movably installed on the inner side of the pulverized coal pipe 3, a fuel pipe 5 is movably installed on the inner side of the central tube 4, the burner outer tube 1, the radial air duct 2, the pulverized coal pipe 3, the central tube 4 and the fuel pipe 5 are all hollow cylinders with both sides missing, the radial air duct 2, the pulverized coal pipe 3 and the central tube 4 are all fixedly connected with an air inlet pipe 6 on the outer side, and an axial air duct 7 is fixedly connected to the outer side of the burner outer tube 1, and the central air, coal air and swirl air are respectively introduced into the central tube 4, the pulverized coal pipe 3 and the radial air duct 2 through the air inlet pipe 6, and the pulverized coal is carried into the central tube 4, the pulverized coal pipe 3 and the radial air duct 2 when introduced. In, the fuel is then introduced through the fuel pipeline 5, and the axial wind is introduced through the axial wind duct 7 outside the burner outer tube 1 to mix with the swirl wind, and finally a high-temperature flame can be sprayed out at the left end of the burner outer tube 1. An electric valve 8 is fixedly installed on the outside of the axial wind duct 7. The model of the electric valve 8 can be VLV26T. The size of the axial flow wind can be adjusted to control the flame shape by controlling the electric valve 8. A connecting block 9 is fixedly installed on the top of the burner outer tube 1 and the radial wind duct 2. An electric push rod 10 is fixedly connected between the connecting blocks 9. The model of the electric push rod 10 can be Y802-4. A number of fixed blocks 11 are fixedly installed on the inner wall of the radial wind duct 2. Every two fixed blocks 11 form a group, and several groups of fixed blocks 11 are evenly distributed in the radial direction in a ring array. On the inner side of the air duct 2, a rotating rod 12 is movably installed between the two fixed blocks 11, and a swirl sheet 13 is fixedly installed on the outer side of the rotating rod 12. A connecting rod 14 is fixedly connected between the swirl sheets 13, and a driven gear 15 is fixedly installed on the outer side of the connecting rod 14. A micro motor 16 is fixedly installed inside the pulverized coal pipe 3. The model of the micro motor 16 can be YNT-01. The burner outer tube 1 and the radial air duct 2 are connected through two connecting blocks 9 and an electric push rod 10. The electric push rod 10 is remotely controlled to work, so that the output end of the electric push rod 10 can drive the radial air duct 2 to move left and right as a whole on the inner side of the burner outer tube 1. The air duct between the radial air duct 2 and the burner outer tube 1 passes into the swirl air, so the movement of the radial air duct 2 increases the cross-sectional area of ​​the swirl air duct Increase or decrease, so as to adjust the wind pressure and wind speed at the air outlet, and the micro motor 16 drives the driving gear 17 to rotate, so that the driven gear 15 rotates, and the driven gear 15 drives the connecting rod 14 to rotate, and then drives multiple connecting rods 14 and the swirl plate 13 to rotate as a whole, the angle of the swirl plate 13 is adjusted, so that the inclination angle of the swirl wind is adjusted, and the purpose of convenient adjustment is achieved. The output end of the micro motor 16 is fixedly connected with the driving gear 17, and the driving gear 17 and the driven gear 15 are meshed with each other. A plug plate 18 is fixedly installed on the outside of the burner outer tube 1. The number of the plug plates 18 is two, and the two plug plates 18 are symmetrically distributed on the left and right sides of the central axis of the burner outer tube 1. A mounting seat 19 is movably installed at the bottom of the burner outer tube 1.The output end of the electric push rod 10 is fixedly connected to the right connecting block 9. The mounting seat 19 is a rectangular parallelepiped with a hollow interior. A slot 20 is provided on the top of the mounting seat 19. A placement slot 21 is provided on the top of the mounting seat 19. The shape of the placement slot 21 is semicircular. The diameter of the placement slot 21 is adapted to the outer diameter of the burner outer tube 1. A rubber pad 22 is fixedly installed inside the placement slot 21. The rubber pad 22 cushions the burner outer tube 1 to prevent vibration and collision during installation or operation, thereby playing a protective role. A support block 23 is movably installed inside the slot 20. A movable rod 24 is fixedly installed at the bottom of the support block 23. A movable plate 25 is fixedly installed at the bottom of the movable rod 24. A telescopic rod 26 is fixedly installed at the bottom of the movable plate 25. The telescopic movement of the telescopic rod 26 guides the lifting and lowering of the movable plate 25, thereby enhancing the stability of the device. The telescopic rod 26 is composed of a sleeve and a sleeve rod. The sleeve rod is movably installed on the inner side of the sleeve. A hydraulic cylinder 27 is fixedly installed at the bottom of the movable plate 25. The model of the hydraulic cylinder 27 can be SH 01308, the bottom of the insert plate 18 contacts the top of the support block 23, the hydraulic cylinder 27 is located on the bottom wall of the inner cavity of the mounting seat 19, the left and right sides of the insert plate 18 are fixedly installed with mounting plates 28, the top of the mounting plate 28 is fixedly installed with fixing bolts 29, the tops of the mounting plate 28 and the mounting seat 19 are provided with a number of screw holes, the fixing bolts 29 penetrate the screw holes and extend to the inside of the mounting seat 19, by placing the burner outer tube 1 in the placement groove 21 in the mounting seat 19, the burner The plug plate 18 on the outside of the burner outer tube 1 is also inserted into the slot 20. The plug plate 18 is supported by the support block 13, and then the fixing bolts 29 on the mounting plate 28 are tightened to complete the installation. When disassembling, the bolts 29 are unscrewed, and the hydraulic cylinder 27 is used to drive the movable plate 25 to rise. The movable plate 25 then drives the movable rods 24 on both sides to rise, and then pushes the support block 23 upward to push the plug plate 18 out of the slot 20, so that the burner outer tube 1 is automatically moved out without manual lifting, achieving the purpose of convenient disassembly and assembly.

[0027] To sum up, the low-nitrogen supersonic energy-saving automatic adjustment six-air duct pulverized coal burner connects the burner outer tube 1 and the radial air duct 2 through two connecting blocks 9 and an electric push rod 10. The electric push rod 10 is remotely controlled to work, so that the output end of the electric push rod 10 can drive the radial air duct 2 to move left and right as a whole on the inner side of the burner outer tube 1. The air duct between the radial air duct 2 and the burner outer tube 1 passes into a swirl wind. Therefore, the movement of the radial air duct 2 increases or decreases the cross-sectional area of ​​the swirl wind duct, thereby adjusting the wind pressure and wind speed at the air outlet. The micro motor 16 drives the active gear 17 to rotate, so that the driven gear 15 rotates, and the driven gear 15 drives the connecting rod 14 to rotate, thereby driving multiple connecting rods 14 and the swirl plate 13 to rotate as a whole. The angle of the swirl plate 13 is adjusted, so that the inclination angle of the swirl wind is adjusted, thereby achieving the purpose of convenient adjustment.

[0028] The outer tube 1 of the burner is placed in the placement groove 21 in the mounting seat 19, and the plug plate 18 on the outer side of the outer tube 1 of the burner is also inserted into the slot 20. The plug plate 18 is supported by the support block 23, and then the fixing bolts 29 on the mounting plate 28 are tightened to complete the installation. When disassembling, the bolts 29 are unscrewed, and the movable plate 25 is driven to rise by the hydraulic cylinder 27. The movable plate 25 then drives the movable rods 24 on both sides to rise, and then pushes the support block 23 to move up, and pushes the plug plate 18 out of the slot 20, so that the outer tube 1 of the burner is automatically moved out without manual lifting, thereby achieving the purpose of convenient disassembly and assembly, solving the problem that the device is inconvenient to adjust the air volume of various winds, resulting in the length and size of the flame being difficult to control, and there is no mounting structure on the outside of the burner, which can only be welded on a bracket with a simple structure for support, and cannot be installed and disassembled, resulting in difficulty in later maintenance.

[0029] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-nitrogen supersonic energy-saving automatic regulating six-air-channel pulverized coal burner, comprising a burner outer tube (1), characterized in that: A radial air duct (2) is movably mounted on the inner side of the burner outer tube (1), a pulverized coal pipe (3) is movably mounted on the inner side of the radial air duct (2), a central tube (4) is movably mounted on the inner side of the pulverized coal pipe (3), a fuel oil pipeline (5) is movably mounted on the inner side of the central tube (4), an air inlet pipe (6) is fixedly connected to the outer side of the radial air duct (2), the pulverized coal pipe (3) and the central tube (4), an axial air duct (7) is fixedly connected to the outer side of the burner outer tube (1), an electric valve (8) is fixedly mounted on the outer side of the axial air duct (7), and the fuel oil pipeline (5) is fixedly mounted on the inner side of the central tube (4). A connection block (9) is fixedly installed on the top of the burner outer tube (1) and the radial air duct (2), an electric push rod (10) is fixedly connected between the connection blocks (9), a plurality of fixed blocks (11) are fixedly installed on the inner wall of the radial air duct (2), a rotating rod (12) is movably installed between two of the fixed blocks (11), a swirl plate (13) is fixedly installed on the outer side of the rotating rod (12), a connecting rod (14) is fixedly connected between the swirl plates (13), and a driven gear (15) is fixedly installed on the outer side of the connecting rod (14). A micro motor (16) is fixedly installed inside the pulverized coal pipe (3), a driving gear (17) is fixedly connected to the output end of the micro motor (16), the driving gear (17) and the driven gear (15) are meshed with each other, a plug plate (18) is fixedly installed on the outside of the burner outer tube (1), a mounting seat (19) is movably installed at the bottom of the burner outer tube (1), a slot (20) is provided at the top of the mounting seat (19), a placement groove (21) is provided at the top of the mounting seat (19), and the inside of the placement groove (21) is fixedly installed A rubber pad (22) is installed, a support block (23) is movably installed inside the slot (20), a movable rod (24) is fixedly installed at the bottom of the support block (23), a movable plate (25) is fixedly installed at the bottom of the movable rod (24), a telescopic rod (26) is fixedly installed at the bottom of the movable plate (25), a hydraulic cylinder (27) is fixedly installed at the bottom of the movable plate (25), mounting plates (28) are fixedly installed on both left and right sides of the plug plate (18), and a fixing bolt (29) is fixedly installed on the top of the mounting plate (28).

2. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The burner outer tube (1), radial air duct (2), pulverized coal tube (3), central tube (4) and fuel oil pipeline (5) are all hollow cylinders with two sides missing.

3. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The output end of the electric push rod (10) is fixedly connected to the right connecting block (9), and the mounting seat (19) is a rectangular parallelepiped with a hollow interior.

4. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: Every two of the fixing blocks (11) form a group, and a plurality of groups of the fixing blocks (11) are evenly distributed on the inner side of the radial air duct (2) in a ring array.

5. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The number of the insert plates (18) is two, and the two insert plates (18) are symmetrically distributed on the left and right sides of the central axis of the burner outer tube (1).

6. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The placement groove (21) is in the shape of a semicircle, and the diameter of the placement groove (21) is matched with the outer diameter of the burner outer tube (1).

7. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The bottom of the insert plate (18) contacts the top of the support block (23), and the hydraulic cylinder (27) is located on the bottom wall of the inner cavity of the mounting seat (19).

8. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The telescopic rod (26) is composed of a sleeve and a sleeve rod, and the sleeve rod is movably mounted inside the sleeve.

9. The low-nitrogen supersonic energy-saving automatic adjustment six-airway pulverized coal burner according to claim 1 is characterized in that: The tops of the mounting plate (28) and the mounting seat (19) are both provided with a plurality of screw holes, and the fixing bolts (29) penetrate through the screw holes and extend into the interior of the mounting seat (19).

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