A boiler reciprocating shock wave sootblowing system

Abstract

The present invention relates to the field of boiler soot cleaning technology, specifically a boiler reciprocating shock wave soot blowing system, comprising a furnace wall, a pulse trough and a guide trough, a first pulse pot and a second pulse pot are fixedly installed on one side of the furnace wall, a second pulse conduit and a first pulse conduit are fixedly installed on the bottom of the first pulse pot and the second pulse pot respectively, two pipe sleeves are fixedly installed inside the furnace wall, one end of the first pulse conduit and the second pulse conduit are extended to one side of the furnace wall through the pipe sleeve. The present invention can carry out soot blowing from both sides and the middle of the furnace, can comprehensively blow soot inside the boiler, and can blow soot instantly, can avoid fly ash being driven by the soot blowing medium to scour and wear the heating surface at high speed and for a long time, and is safer for long-term use. At the same time, the staff can start the motor with the pulse trough for reciprocating movement, so that the spray hood can accurately blow soot at different positions.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler soot cleaning, in particular to a boiler reciprocating shock wave soot blowing system. Background Art

[0002] After long-term use, the boiler needs to clean the internal ash. There are three types of ash in the boiler, namely high-temperature coking, dry loose ash and low-temperature ash. The presence of these ash deposits can easily induce safety accidents, reduce thermal efficiency, reduce boiler output, shorten boiler service life and reduce economic benefits.

[0003] Since the presence of ash accumulation in the boiler will affect the normal use of the boiler, it is necessary to clean the ash accumulation inside the boiler. Traditional cleaning technologies mainly include cleaning agent cleaning, steel ball cleaning, vibration cleaning, acoustic cleaning, compressed air blowing cleaning, steam soot blowing and hydraulic soot blowing, among which steam soot blowing is the mainstream and most commonly used. After using steam soot blowing, the water generated by the steam needs to be removed, which is very inconvenient. In addition, steam will lower the temperature of the flue gas and increase the humidity of the flue gas. In addition, the SO2 and SO3 contained in the flue gas inside the boiler will combine with water vapor to condense to form low-temperature ash accumulation, so the use of steam soot blowing will increase the tendency of acid dew. Therefore, in order to solve the above problems, we have made improvements and proposed a boiler reciprocating shock wave soot blowing system. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The present invention provides a reciprocating shock wave sootblowing system for a boiler, comprising a furnace wall, a pulse trough, and a guide trough. A first pulse pot and a second pulse pot are fixedly mounted on one side of the furnace wall. A second pulse conduit and a first pulse conduit are fixedly mounted on the bottoms of the first pulse pot and the second pulse pot, respectively. Two pipe sleeves are fixedly mounted inside the furnace wall. One end of the first pulse conduit and the second pulse conduit extend to one side of the furnace wall through the pipe sleeves. The tops of the first pulse pot and the second pulse pot are connected to ignition and premixed gas pipelines. One end of the ignition and premixed gas pipelines is connected to a gas distribution ignition device. One end of the second pulse conduit is connected to the middle position of one side of the guide trough. A clamping strip is provided on both sides of the top of the guide trough. A slot is provided on both sides of the pulse trough. The guide trough and the pulse trough are slidably connected to the clamping strip and the slot. A mounting plate is fixedly mounted on both sides of the back of the guide trough. A screw is rotatably mounted between the two mounting plates. A motor is fixedly mounted on one side of the furnace wall. One end of the screw passes through the corresponding mounting plate and the furnace wall and is fixedly connected to the output end of the motor.

[0006] As a preferred technical solution of the present invention, the gas distribution ignition device includes an acetylene delivery pipe, a pressure box, an acetylene pressure-stabilizing valve, an oxygen delivery pipe, an exhaust valve, an igniter, a temperature sensor, a water cooling jacket, an oxygen and air flame arrester, an acetylene flame arrester, a pipeline control box, a compressed air pressure-stabilizing valve and a compressed air delivery pipe, wherein the oxygen and air flame arrester and the acetylene flame arrester are both connected to one end of the ignition and premixed gas pipeline.

[0007] As a preferred technical solution of the present invention, the pressure box is sleeved on the outside of the acetylene delivery pipe and the compressed air delivery pipe, and the acetylene pressure stabilizing valve and the compressed air pressure stabilizing valve are respectively installed on the surfaces of the acetylene delivery pipe and the compressed air delivery pipe located inside the pressure box.

[0008] As a preferred technical solution of the present invention, the pipeline control box is sleeved on the outside of the acetylene delivery pipe, the oxygen delivery pipe and the compressed air delivery pipe, and the surfaces of the acetylene delivery pipe, the oxygen delivery pipe and the compressed air delivery pipe located inside the pipeline control box are all provided with solenoid valves, one end of the oxygen delivery pipe and the compressed air delivery pipe are connected to the top of the oxygen and air flame arrester, and one end of the acetylene delivery pipe is connected to the top of the acetylene flame arrester.

[0009] As a preferred technical solution of the present invention, two water cooling jackets and two temperature sensors are fixedly installed on the outer surface of the ignition and premixed gas pipeline, and the two temperature sensors are respectively located on one side of the two water cooling jackets.

[0010] As a preferred technical solution of the present invention, an igniter and an exhaust valve are fixedly installed on the outer surface of the ignition and premixed gas pipeline, the igniter is located on one side of the two water-cooling jackets and between the two temperature sensors, and the exhaust valve is located on one side of the igniter.

[0011] As a preferred technical solution of the present invention, spray hoods are fixedly installed on both sides of the top of the pulse trough, triangular blocks are fixedly installed on both sides of the inside of the pulse trough, and the length of the pulse trough is greater than half the length of the guide trough.

[0012] As a preferred technical solution of the present invention, a connecting block is fixedly installed at the middle position of the back of the pulse groove, an internal threaded sleeve is threadedly installed on the surface of the screw rod, and one end of the connecting block is fixedly connected to the surface of the internal threaded sleeve.

[0013] The beneficial effects of the present invention are:

[0014] The boiler's reciprocating shock wave soot blowing system ignites the gas inside the pulse tank through an igniter, generating a thermal explosion. The thermal explosion in the pulse tank generates a strong compression shock wave that enters the furnace through the pulse duct and propagates everywhere. When passing through the ash layer in the furnace, it produces a "punch, suck, and pull" effect and a "pressure micro-explosion" effect, causing the ash to collapse, break up, and detach from the attached surface, thereby removing the ash from the furnace.

[0015] The boiler reciprocating shock wave soot blowing system blows soot from both sides and the middle of the furnace respectively, which can comprehensively blow soot inside the boiler and can blow soot instantly, so as to avoid fly ash being driven by the soot blowing medium to erode the heating surface at high speed and for a long time, and is safer for long-term use. At the same time, the staff can start the motor to drive the screw to rotate, and the internal threaded sleeve of the screw moves, and the internal threaded sleeve drives the pulse slot to move left and right inside the furnace body through the connecting block. At this time, the spray hood will move with the pulse slot, so that different positions can be accurately blown soot. By controlling the forward and reverse rotation of the motor, the internal threaded sleeve can be controlled to reciprocate, so that the pulse slot moves back and forth inside the furnace body, so as to perform reciprocating soot blowing inside the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of a boiler reciprocating shock wave sootblowing system according to the present invention;

[0018] Figure 2 This is one of the three-dimensional views of a pulse trough of a boiler reciprocating shock wave sootblowing system according to the present invention;

[0019] Figure 3 This is a three-dimensional diagram of a boiler reciprocating shock wave sootblowing system according to the present invention;

[0020] Figure 4 This is the second stereoscopic view of a pulse trough of a boiler reciprocating shock wave sootblowing system according to the present invention;

[0021] Figure 5 It is a side view of a pulse trough of a boiler reciprocating shock wave sootblowing system according to the present invention;

[0022] Figure 6 The invention is a boiler reciprocating shock wave soot blowing system Figure 5 Schematic diagram of the enlarged structure at B in the middle;

[0023] Figure 7 The invention is a boiler reciprocating shock wave soot blowing system Figure 5 Schematic diagram of the structure at AA in the middle;

[0024] Figure 8 This is a structural schematic diagram of a gas distribution and ignition device for a boiler reciprocating shock wave sootblowing system according to the present invention;

[0025] In the figure: 1. Gas distribution and ignition device; 2. Ignition and premixed gas pipeline; 3. Furnace wall; 4. First pulse tank; 5. Pipe sleeve; 6. First pulse guide tube; 7. Second pulse guide tube; 8. Motor; 9. Ejection hood; 10. Screw rod; 11. Pulse groove; 12. Guide groove; 13. Mounting plate; 14. Internal threaded sleeve; 15. Connecting block; 16. Triangular block; 17. Second pulse tank; 18. Slot; 19. Card strip; 20. Acetylene delivery pipe; 21. Pressure box; 22. Acetylene pressure-stabilizing valve; 23. Oxygen delivery pipe; 24. Compressed air delivery pipe; 25. Compressed air pressure-stabilizing valve; 26. Pipeline control box; 27. Acetylene flame arrester; 28. Oxygen and air flame arrester; 29. ​​Water cooling jacket; 30. Temperature sensor; 31. Ignitor; 32. Exhaust valve. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] See also Figure 1-8The present invention provides a technical solution: a technical solution of a boiler reciprocating shock wave soot blowing system, comprising a furnace wall 3, a pulse groove 11 and a guide groove 12, a first pulse tank 4 and a second pulse tank 17 are fixedly installed on one side of the furnace wall 3, a second pulse guide tube 7 and a first pulse guide tube 6 are fixedly installed on the bottom of the first pulse tank 4 and the second pulse tank 17 respectively, two pipe sleeves 5 are fixedly installed inside the furnace wall 3, one end of the first pulse guide tube 6 and the second pulse guide tube 7 are extended to one side of the furnace wall 3 through the pipe sleeve 5, the top of the first pulse tank 4 and the second pulse tank 17 are connected to the ignition and premixed gas pipeline 2, one end of the ignition and premixed gas pipeline 2 is connected to the gas distribution ignition device 1, one end of the second pulse guide tube 7 is connected to the middle position of one side of the guide groove 12, and the gas distribution ignition device 1 is used to ignite the first pulse tank 4 and the second pulse tank 17. A mixture of acetylene and oxygen is transported in the furnace, and the gas inside the first pulse tank 4 and the second pulse tank 17 is ignited by the igniter 31, resulting in a thermal explosion. The thermal explosion in the first pulse tank 4 and the second pulse tank 17 will generate a strong compression shock wave, which will enter the furnace and the pulse tank 11 through the first pulse conduit 6 and the second pulse conduit 7 respectively. The compression shock wave entering the furnace will propagate around the outside of the furnace, while the shock wave entering the pulse tank 11 will enter the middle of the furnace through the eruption hood 9 and propagate around. When passing through the ash layer in the furnace, a "punch suction and pull" effect and a "pressure micro-explosion" effect will occur, causing the ash to collapse, break up, and detach from the attached surface, thereby removing the ash from the furnace. By blowing soot from the outside and the middle of the furnace respectively, the interior of the boiler can be fully blown.

[0028] There are clamping strips 19 on both sides of the top of the guide groove 12, and slots 18 on both sides of the pulse groove 11. The guide groove 12 and the pulse groove 11 are slidably connected through the clamping strips 19 and the slots 18. Mounting plates 13 are fixedly installed on both sides of the back of the guide groove 12, and a screw rod 10 is rotatably installed between the two mounting plates 13. A motor 8 is fixedly installed on one side of the furnace wall 3. One end of the screw rod 10 passes through the corresponding mounting plate 13 and the furnace wall 3 and is fixedly connected to the output end of the motor 8. By controlling the forward and reverse rotation of the motor 8, the internal threaded sleeve 14 can be controlled to reciprocate, so that the pulse groove 11 moves back and forth left and right inside the furnace body, thereby performing reciprocating soot blowing inside the furnace body.

[0029] The gas distribution ignition device 1 includes an acetylene delivery pipe 20, a pressure box 21, an acetylene pressure-stabilizing valve 22, an oxygen delivery pipe 23, an exhaust valve 32, an igniter 31, a temperature sensor 30, a water-cooling jacket 29, an oxygen and air flame arrester 28, an acetylene flame arrester 27, a pipeline control box 26, a compressed air pressure-stabilizing valve 25 and a compressed air delivery pipe 24. The oxygen and air flame arrester 28 and the acetylene flame arrester 27 are both connected to one end of the ignition and premixed gas pipeline 2. The provision of the oxygen and air flame arrester 28 and the acetylene flame arrester 27 can prevent the flame from entering the interior of the acetylene delivery pipe 20, the oxygen delivery pipe 23 and the compressed air delivery pipe 24 after ignition.

[0030] The pressure box 21 is sleeved on the outside of the acetylene delivery pipe 20 and the compressed air delivery pipe 24. The acetylene delivery pipe 20 and the compressed air delivery pipe 24 are respectively installed with an acetylene pressure-stabilizing valve 22 and a compressed air pressure-stabilizing valve 25 on the surface inside the pressure box 21. The acetylene pressure-stabilizing valve 22 and the compressed air pressure-stabilizing valve 25 can keep the pressures of acetylene and compressed air within a certain range.

[0031] The pipeline control box 26 is sleeved on the outside of the acetylene delivery pipe 20, the oxygen delivery pipe 23 and the compressed air delivery pipe 24. The surfaces of the acetylene delivery pipe 20, the oxygen delivery pipe 23 and the compressed air delivery pipe 24 located inside the pipeline control box 26 are all provided with solenoid valves. One end of the oxygen delivery pipe 23 and the compressed air delivery pipe 24 are connected to the top of the oxygen and air flame arrester 28, and one end of the acetylene delivery pipe 20 is connected to the top of the acetylene flame arrester 27. The opening or closing of the acetylene delivery pipe 20, the oxygen delivery pipe 23 and the compressed air delivery pipe 23 can be controlled by the solenoid valve.

[0032] Two water cooling jackets 29 and two temperature sensors 30 are fixedly installed on the outer surface of the ignition and premixed gas pipeline 2. The two temperature sensors 30 are respectively located on one side of the two water cooling jackets 29. The temperature sensors 30 can detect the temperature inside the ignition and premixed gas pipeline 2.

[0033] An igniter 31 and an exhaust valve 32 are fixedly installed on the outer surface of the ignition and premixed gas pipeline 2. The igniter 31 is located on one side of the two water-cooling jackets 29 and between the two temperature sensors 30. The exhaust valve 32 is located on one side of the igniter 31. The igniter 31 can ignite the gas inside the first pulse tank 4 and the second pulse tank 17 to produce a thermal explosion.

[0034] The two sides of the top of the pulse groove 11 are fixedly installed with the spray hood 9, and the two sides of the inside of the pulse groove 11 are fixedly installed with the triangular blocks 16. The length of the pulse groove 11 is greater than half the length of the guide groove 12. The triangular blocks 16 are set to increase the anti-deformation ability of both sides of the pulse groove 11. Since the length of the pulse groove 11 is greater than half the length of the guide groove 12, when the pulse groove 11 moves to one side of the guide groove 12, the second pulse conduit 7 can still be connected to the inside of the pulse groove 11.

[0035] A connecting block 15 is fixedly installed in the middle position on the back of the pulse groove 11, and an internal threaded sleeve 14 is threadedly installed on the surface of the screw rod 10. One end of the connecting block 15 is fixedly connected to the surface of the internal threaded sleeve 14. The staff can start the motor to drive the screw rod 10 to rotate, and the internal threaded sleeve 14 of the screw rod 10 moves. The internal threaded sleeve 14 drives the pulse groove 11 to move left and right inside the furnace body through the connecting block 15. At this time, the spray hood 9 will move with the pulse groove 11, so that accurate soot blowing can be performed on different positions.

[0036] Working Principle: When using the reciprocating shock wave sootblowing system for a boiler, the guide trough 12 is first installed at an appropriate position in the boiler. Then, a mixed gas containing acetylene and oxygen is delivered to the first pulse tank 4 and the second pulse tank 17 through the gas distribution ignition device 1. The gas inside the first pulse tank 4 and the second pulse tank 17 is ignited by the igniter 31, causing a thermal explosion. The thermal explosion in the first pulse tank 4 and the second pulse tank 17 will generate a strong compression shock wave, which will enter the furnace and the pulse trough 11 through the first pulse duct 6 and the second pulse duct 7 respectively. The compression shock wave entering the furnace will propagate around the outside of the furnace, while the shock wave entering the pulse trough 11 will enter the center of the furnace through the ejection hood 9 and propagate around. When passing through the ash layer in the furnace, a "punch suction and pull" effect and a "pressure micro-explosion" effect will occur, causing the ash to collapse, break up, and detach from the attached surface, thereby removing the ash from the furnace. By blowing the furnace from the outside and the center respectively, the boiler interior can be fully sootblown.

[0037] The thermal explosion in the first pulse tank 4 and the second pulse tank 17 will also cause the instantaneous explosion pressure in the tank and the physical explosion caused by the pressure relief at the outlet interface of the first pulse duct 6 and the spray hood 9 will also generate a compression shock wave, which also has the effect of cleaning dust.

[0038] The pulse jet ejected at high speed from the first pulse duct 6 and the outlet of the eruption hood 9 following the shock wave can have a strong purging effect on the accumulated dust within its coverage area. At the same time, due to the instantaneous high temperature of the pulse jet, it has a certain "thermal shock cracking" effect on the compacted dust scale directly impacted by it. With the vibration of the accumulated dust surface caused by thermal explosion, physical explosion, compression shock wave and high-speed pulse jet, it also has an obvious high-frequency alternating inertial force cleaning effect.

[0039] The staff can start the motor to drive the screw 10 to rotate, and the internal threaded sleeve 14 of the screw 10 moves. The internal threaded sleeve 14 drives the pulse slot 11 to move left and right inside the furnace body through the connecting block 15. At this time, the spray hood 9 will move with the pulse slot 11, so that accurate soot blowing can be performed on different positions. By controlling the forward and reverse rotation of the motor 8, the internal threaded sleeve 14 can be controlled to reciprocate, so that the pulse slot 11 moves back and forth inside the furnace body, so that soot blowing can be performed reciprocatingly inside the furnace body.

[0040] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0041] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A boiler reciprocating shock wave soot blowing system, comprising a furnace wall (3), a pulse groove (11) and a guide groove (12), characterized in that: A first pulse tank (4) and a second pulse tank (17) are fixedly installed on one side of the furnace wall (3), and a second pulse conduit (7) and a first pulse conduit (6) are fixedly installed on the bottom of the first pulse tank (4) and the second pulse tank (17), respectively. Two pipe sleeves (5) are fixedly installed inside the furnace wall (3), and one end of the first pulse conduit (6) and the second pulse conduit (7) are extended to one side of the furnace wall (3) through the pipe sleeves (5). The tops of the first pulse tank (4) and the second pulse tank (17) are connected to an ignition and premixed gas pipeline (2), and one end of the ignition and premixed gas pipeline (2) is connected to a gas distribution ignition device (1). The second pulse conduit (7) One end of the guide groove (12) is connected to the middle position of one side of the guide groove (12), and a clamping strip (19) is provided on both sides of the top of the guide groove (12). A slot (18) is provided on both sides of the pulse groove (11). The guide groove (12) and the pulse groove (11) are slidably connected through the clamping strip (19) and the slot (18). Mounting plates (13) are fixedly installed on both sides of the back of the guide groove (12), and a screw rod (10) is rotatably installed between the two mounting plates (13). A motor (8) is fixedly installed on one side of the furnace wall (3), and one end of the screw rod (10) passes through the corresponding mounting plate (13) and the furnace wall (3) and is fixedly connected to the output end of the motor (8); The gas distribution ignition device (1) comprises an acetylene delivery pipe (20), a pressure box (21), an acetylene pressure stabilizing valve (22), an oxygen delivery pipe (23), an exhaust valve (32), an igniter (31), a temperature sensor (30), a water cooling jacket (29), an oxygen and air flame arrester (28), an acetylene flame arrester (27), a pipeline control box (26), a compressed air pressure stabilizing valve (25) and a compressed air delivery pipe (24), wherein the oxygen and air flame arrester (28) and the acetylene flame arrester (27) are both connected to one end of the ignition and premixed gas pipeline (2); A connecting block (15) is fixedly installed at the middle position of the back side of the pulse slot (11), an internal thread sleeve (14) is threadedly installed on the surface of the screw rod (10), and one end of the connecting block (15) is fixedly connected to the surface of the internal thread sleeve (14).

2. A boiler reciprocating shock wave sootblowing system according to claim 1, characterized in that: The pressure box (21) is sleeved on the outside of the acetylene delivery pipe (20) and the compressed air delivery pipe (24), and the acetylene pressure stabilizing valve (22) and the compressed air pressure stabilizing valve (25) are respectively installed on the surfaces of the acetylene delivery pipe (20) and the compressed air delivery pipe (24) located inside the pressure box (21).

3. A boiler reciprocating shock wave sootblowing system according to claim 1, characterized in that: The pipeline control box (26) is sleeved on the outside of the acetylene delivery pipe (20), the oxygen delivery pipe (23) and the compressed air delivery pipe (24); solenoid valves are provided on the surfaces of the acetylene delivery pipe (20), the oxygen delivery pipe (23) and the compressed air delivery pipe (24) located inside the pipeline control box (26); one end of the oxygen delivery pipe (23) and the compressed air delivery pipe (24) are connected to the top of the oxygen and air flame arrester (28); and one end of the acetylene delivery pipe (20) is connected to the top of the acetylene flame arrester (27).

4. A boiler reciprocating shock wave sootblowing system according to claim 1, characterized in that: Two water cooling jackets (29) and two temperature sensors (30) are fixedly mounted on the outer surface of the ignition and premixed gas pipeline (2), and the two temperature sensors (30) are respectively located on one side of the two water cooling jackets (29).

5. The boiler reciprocating shock wave sootblowing system according to claim 1, characterized in that: An igniter (31) and an exhaust valve (32) are fixedly mounted on the outer surface of the ignition and premixed gas pipeline (2). The igniter (31) is located on one side of the two water-cooling jackets (29) and between the two temperature sensors (30). The exhaust valve (32) is located on one side of the igniter (31).

6. The boiler reciprocating shock wave sootblowing system according to claim 1, characterized in that: Spray covers (9) are fixedly mounted on both sides of the top of the pulse groove (11), triangular blocks (16) are fixedly mounted on both sides of the interior of the pulse groove (11), and the length of the pulse groove (11) is greater than half the length of the guide groove (12).

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