Atomizing spray gun for flue gas treatment

Abstract

The invention discloses an atomizing spray gun for flue gas treatment, and belongs to the technical field of spray guns. An atomizing spray gun for flue gas treatment comprises a fixing base, the fixing base is tubular in appearance, the atomizing spray gun further comprises a mixer and a spray head which are connected to the two ends of the fixing base respectively, a mixing cavity is formed in the mixer, and the two ends of the mixer are provided with an air inlet and an output port respectively. The air inlet and the output port are both communicated with the mixing cavity; the liquid inlet is formed in the outer wall of the mixer, the liquid inlet is perpendicular to the mixing cavity, the liquid inlet is communicated with the mixing cavity through a mounting hole, and a porous component for dispersing liquid is arranged in the mounting hole; according to the invention, the liquid can be crushed for at least three times, the flow and pressure selection range is expanded, and flue gas treatment under various working conditions is met, so that the atomization effect can be obviously improved, and the utilization rate of a reducing agent is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of spray guns, in particular to an atomizing spray gun for flue gas treatment. Background Art

[0002] The atomizing spray gun for flue gas treatment is a device that can decompose liquid into fine droplets. It is mainly used in many fields such as industrial environmental management. Its working principle is to use the power of high-speed airflow and low-pressure liquid itself to break the liquid into tiny particles when it is sprayed out, forming a mist distribution. In the process of flue gas treatment of coal-fired boilers, gas boilers, biomass boilers, waste heat boilers, and waste incineration boilers, a kind of atomizing spray gun for flue gas treatment is also used. It is mainly used to inject reducing agents into the flue gas.

[0003] During the flue gas treatment process, it was found that as the hazardous waste flue gas treatment enters the boiler combustion treatment, the corrosive gas and dust in the flue gas increase, which will cause the corrosion and wear of the nozzle to accelerate; and the amount of hazardous waste flue gas input will change constantly, and the reducing agent for treating the flue gas will also change accordingly, which requires the spray gun flow change range to increase, but the existing spray gun flow atomization range cannot meet it, and the reducing agent injection amount can only be increased, which will cause the denitrification rate to decrease and the cost to increase. Excessive injection of reducing agent and long-term injection of reducing agent will cause certain corrosion damage to the boiler. In summary, the spray gun does not mix the gas and liquid sufficiently, resulting in larger atomized particles entering the flue gas, and the treatment effect on the flue gas is not ideal, resulting in insufficient utilization of the reducing agent. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the spray gun does not mix the gas and liquid sufficiently, resulting in larger atomized particles entering the flue gas, less than ideal flue gas treatment effect, and insufficient utilization of the reducing agent, and to propose an atomizing spray gun for flue gas treatment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An atomizing spray gun for flue gas treatment comprises a fixed base, which is tubular in shape, and also comprises: a mixer and a nozzle, which are respectively connected to the two ends of the fixed base, wherein a mixing chamber is provided inside the mixer, and an air inlet and an outlet are respectively provided at the two ends of the mixer, and the air inlet and the outlet are both connected to the mixing chamber; a liquid inlet is arranged on the outer wall of the mixer, wherein the liquid inlet is vertically arranged to the mixing chamber, and the liquid inlet and the mixing chamber are connected through a mounting hole, and a porous component for dispersing liquid is provided in the mounting hole.

[0006] In order to improve the atomization effect of the liquid, preferably, the porous component includes a short tube inserted in the mounting hole, the lower port of the short tube is open, the upper end of the short tube is provided with an upper hole connected to the mixing chamber, the outer wall of the short tube is provided with symmetrically arranged side holes, and the side holes are connected to the mixing chamber, and the side holes are perpendicular to the upper hole and the air inlet.

[0007] In order to enhance the breaking effect of gas on liquid, preferably, the gas inlet is connected to the mixing chamber via a fine hole, and both ends of the fine hole are chamfered.

[0008] In order to facilitate the connection of equipment providing liquid and gas, further, the liquid inlet, gas inlet and outlet are respectively threadedly connected with a first threaded tube, a second threaded tube and a third threaded tube, and sealing rings are installed in the liquid inlet, gas inlet and outlet.

[0009] In order to improve the installation stability and sealing of the short tube, further, the outer wall of the lower end of the short tube is fixedly connected to a limit plate, a limit groove is provided between the installation hole and the liquid inlet, and the limit plate is clamped in the limit groove.

[0010] In order to enhance the mixing effect of liquid and gas, further, the internal fixing sleeve of the fixed base is provided with a gun rod passing through both ends thereof, the nozzle is threadedly connected to one end of the gun rod, and the end of the fixed base is threadedly connected to a protective sleeve sleeved on the gun rod and the outer wall of the nozzle, the protective sleeve and the nozzle are both made of TIC alloy steel, and the other end of the gun rod is connected to a third threaded tube.

[0011] In order to improve the sealing and stability between the gun rod and the mixer, further, an inner tube is sleeved inside the third threaded tube, an annular plate is fixedly connected to one end of the inner tube close to the air inlet, the annular plate is located between the third threaded tube and the sealing ring, the outer wall of the inner tube and the inner wall of the third threaded tube are both provided with annular grooves, the gun rod is inserted in the annular groove and is threadedly connected to the outer wall of the inner tube.

[0012] In order to make the nozzle suitable for various occasions, preferably, a spray port is provided at the end of the nozzle, and the shape of the spray port is conical or V-shaped.

[0013] In order to further enhance the mixing effect of gas and liquid, a long rod colinear with its axis is provided in the gun barrel, and a plurality of turntables are rotatably mounted on the outer wall of the long rod. The outer walls of the plurality of turntables are fixedly connected with a plurality of circumferentially distributed short plates, and the side walls of the short plates are provided with inclined surfaces and through holes.

[0014] In order to facilitate the disassembly and replacement of the short plate, further, the inner wall of the long rod is fixedly connected with a cross bar, the side wall of the cross bar is provided with a slot, and the long rod is fixedly connected with an insert block inserted in the slot.

[0015] Compared with the prior art, the present invention provides an atomizing spray gun for flue gas treatment, which has the following beneficial effects: 1. The atomizing spray gun for flue gas treatment, through the action of the mixer and the nozzle, the liquid will be broken at least three times, and the flow rate and pressure selection range are expanded to meet the flue gas treatment of various working conditions, thereby significantly improving the atomization effect and further improving the utilization rate of the reducing agent.

[0016] 2. The atomizing spray gun for flue gas treatment, through the flowing mixture, will push the short plate to revolve around the long rod under the action of the inclined surface, and the through holes on the outer wall of the short plate will further break up the liquid, so that the atomization effect of the spray gun is further improved.

[0017] 3. The atomizing spray gun for flue gas treatment can make the nozzle less susceptible to corrosion through the protective cover and nozzle made of TIC alloy steel, thereby increasing the service life of the nozzle and facilitating the maintenance of the nozzle.

[0018] 4. The atomizing spray gun for flue gas treatment meets various working conditions through the three designed nozzle structures, provides a variety of choices and combinations, and the nozzle adopts British cone connection to ensure the sealing requirements and is easy to maintain and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the axonometric structure of an atomizing spray gun for flue gas treatment proposed by the present invention from a first perspective; Figure 2 This is a schematic diagram of an axonometric cross-section structure of an atomizing spray gun for flue gas treatment proposed by the present invention; Figure 3 A schematic diagram of the partial cross-section structure of an atomizing spray gun for flue gas treatment proposed by the present invention Figure 1 ; Figure 4 This is a schematic diagram of the cutaway structure of a protective cover of an atomizing spray gun for flue gas treatment proposed by the present invention; Figure 5 A schematic diagram of the partial cross-section structure of an atomizing spray gun for flue gas treatment proposed by the present invention Figure 2 ; Figure 6 This is a schematic diagram of the cross-sectional structure of a mixer of an atomizing spray gun for flue gas treatment proposed by the present invention; Figure 7 This is a schematic diagram of the short tube isometric structure of an atomizing spray gun for flue gas treatment proposed by the present invention; Figure 8 This is a schematic diagram of an axonometric cutaway structure of a fixed base of an atomizing spray gun for flue gas treatment proposed by the present invention; Fig. 9This is a schematic diagram of the short-plate axonometric structure of an atomizing spray gun for flue gas treatment proposed by the present invention; Fig.10 Schematic diagram of the nozzle structure of a smoke treatment atomizing spray gun proposed by the present invention Figure 1 ; Fig.11 Schematic diagram of the nozzle structure of a smoke treatment atomizing spray gun proposed by the present invention Figure 2 ; Fig.12 Schematic diagram of the nozzle structure of a smoke treatment atomizing spray gun proposed by the present invention Figure 3 .

[0020] In the figure: 1. fixed base; 2. gun barrel; 3. protective cover; 4. mixer; 5. nozzle; 6. air inlet; 7. liquid inlet; 8. mixing chamber; 9. fine hole; 10. mounting hole; 11. first threaded tube; 12. second threaded tube; 13. third threaded tube; 14. inner tube; 15. annular plate; 16. annular groove; 17. sealing ring; 18. short tube; 19. limiting plate; 20. side hole; 21. upper hole; 22. limiting groove; 23. spray nozzle; 24. long rod; 25. turntable; 26. short plate; 27. inclined surface; 28. through hole; 29. ​​cross bar; 30. plug-in block; 31. output port. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position 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 therefore cannot be understood as a limitation on the present invention.

[0023] Embodiment 1: Reference Figure 1-Figure 12 A smoke treatment atomizing spray gun includes a fixed base 1, the fixed base 1 is tubular in shape, and further includes: a mixer 4 and a nozzle 5 for crushing liquid, respectively connected to the two ends of the fixed base 1, wherein the end of the nozzle 5 is provided with a spray port 23 for spraying atomized liquid, and the shape of the spray port 23 is conical (such as Fig.10 As shown, the actual radial section shape is an isosceles trapezoid (such as Fig.12 As shown, the actual radial section shape is V-shaped) or multiple circular holes distributed around the circumference (such as Fig.11 As shown, in practice, the radial cross-section of each circular hole is a rectangle), the three forms are used in different occasions to meet various working conditions, providing a variety of choices and combinations, the number of spray ports 23 of the porous nozzle 5 is 6, the interior of the mixer 4 is provided with a mixing chamber 8 for mixing gas and liquid, and the two ends of the mixer 4 are respectively provided with an air inlet 6 for conveying compressed air and an outlet 31 for discharging the mixed liquid, and the air inlet 6 and the outlet 31 are both connected to the mixing chamber 8; the liquid inlet 7 for conveying liquid into the mixing chamber 8 is arranged on the outer wall of the mixer 4, wherein the liquid inlet 7 and the mixing chamber 8 are vertically arranged, and the liquid inlet 7 and the mixing chamber 8 are connected through the mounting hole 10, and a porous component for dispersing the liquid is provided in the mounting hole 10.

[0024] Specifically, when in use, the gas is transported to the air inlet 6, and the liquid is transported to the liquid inlet 7. The porous component in the liquid inlet 7 can cause the liquid to be broken and atomized three times, and finally it will be sprayed out from the spray port 23 of the nozzle 5. Under the action of three times of breaking, the atomization particle size of the liquid is reduced, which significantly improves the atomization effect, thereby improving the utilization rate of the reducing agent.

[0025] Embodiment 2: Reference Figure 1-Figure 2 as well as Figure 5-Figure 7 , which is basically the same as Example 1, and further discloses a specific implementation scheme of the porous component.

[0026] The above-mentioned porous component includes a short tube 18 inserted into the mounting hole 10, the lower end of the short tube 18 is open, the upper end of the short tube 18 is provided with an upper hole 21 connected to the mixing chamber 8, the outer wall of the short tube 18 is provided with symmetrically arranged side holes 20, and the side holes 20 are connected to the mixing chamber 8, the side holes 20 are perpendicular to the upper hole 21 and the air inlet 6, the liquid inlet 7, the air inlet 6 and the outlet 31 are respectively threadedly connected with the first threaded tube 11, the second threaded tube 12 and the third threaded tube 13, and the liquid inlet 7, the air inlet 6 and the outlet 31 are all installed with sealing rings 17, and the sealing rings 17 can significantly improve the overall sealing performance.

[0027] Specifically, when in use, the gas is transported to the second threaded tube 12, and the liquid is transported to the first threaded tube 11. The gas entering the second threaded tube 12 will enter the mixing chamber 8 through the fine hole 9, and the liquid entering the first threaded tube 11 will first enter the short tube 18, and then enter the mixing chamber 8 from the side hole 20 and the upper hole 21 on the short tube 18. The liquid will first be efficiently broken, and the three streams of liquid will be further broken by the gas entering the mixing chamber 8. During this period, the mutually perpendicular side holes 20 and the upper hole 21 will make the gas-liquid mixing effect better, so as to make the subsequent atomization effect better, and the broken liquid will be broken and atomized for the third time in the nozzle 5, and finally will be sprayed out from the spray port 23 of the nozzle 5. Under the three-time breaking action, the atomization particle size of the liquid is reduced, which significantly improves the atomization effect, thereby improving the utilization rate of the reducing agent.

[0028] The air inlet 6 and the mixing chamber 8 are connected via a fine hole 9, the diameter of which is smaller than the inner diameter of the second threaded tube 12, and both ends of the fine hole 9 are provided with chamfers. When the gas enters the mixing chamber 8, the gas will first pass through the fine hole 9. Since the diameter of the fine hole 9 is smaller than the inner diameter of the second threaded tube 12, the gas will be compressed, and the impact force of the compressed gas will be stronger, thereby making the gas have a better crushing effect on the liquid.

[0029] The outer wall of the lower end of the above-mentioned short tube 18 is fixedly connected to the limiting plate 19, and a limiting groove 22 is provided between the mounting hole 10 and the liquid inlet 7. The limiting plate 19 is clamped in the limiting groove 22. Therefore, when the first threaded tube 11 is installed, the tightened first threaded tube 11 will press the sealing ring 17 onto the limiting plate 19, thereby improving the sealing between the limiting plate 19 and the limiting groove 22, and then improving the installation sealing of the short tube 18.

[0030] In practice, due to the optimization of the structure of the mixer 4, the spray gun can achieve the atomization requirements under the condition of small gas-hydraulic pressure (0.2MPA), and realize atomization at a small flow rate (10L / H). Within a certain pressure range (0.2-0.4MPa), the flow adjustment range is expanded to meet the needs of various working conditions.

[0031] Embodiment three: Reference Figure 1-Figure 4 , which is basically the same as the second embodiment, and further, a specific implementation scheme for protecting the nozzle 5 is specifically added.

[0032] The internal fixed sleeve of the fixed base 1 is provided with a gun barrel 2 passing through both ends thereof, and the nozzle 5 is threadedly connected to one end of the gun barrel 2. The appearance of the gun barrel 2 is a long tube. The end of the fixed base 1 is threadedly connected to a protective sleeve 3 sleeved on the outer wall of the gun barrel 2 and the nozzle 5. The materials of the protective sleeve 3 and the nozzle 5 are both TIC alloy steel. The other end of the gun barrel 2 is connected to the third threaded tube 13.

[0033] Specifically, when the crushed liquid is discharged from the third threaded tube 13, the liquid will also enter the long tubular gun barrel 2, so the liquid will be more fully mixed and crushed in a longer channel, and the TIC alloy steel protective cover 3 can protect the nozzle 5, making the nozzle 5 less susceptible to corrosion and increasing the service life of the nozzle 5.

[0034] The third threaded tube 13 is sleeved with an inner tube 14, and an annular plate 15 is fixedly connected to one end of the inner tube 14 close to the air inlet 6. The annular plate 15 is located between the third threaded tube 13 and the sealing ring 17. The outer wall of the inner tube 14 and the inner wall of the third threaded tube 13 are both provided with annular grooves 16. The gun barrel 2 is inserted into the annular groove 16 and is threadedly connected to the outer wall of the inner tube 14.

[0035] Specifically, the crushed liquid will enter the inner tube 14 in the output port 31, and then enter the gun barrel 2, and then enter the protective cover 3 from the gun barrel 2. The design of the inner tube 14 will make the replacement of the gun barrel 2 more convenient, and the design of the annular groove 16 can ensure the sealing of the gun barrel 2, and the annular plate 15 can further improve the sealing of the inner tube 14.

[0036] Embodiment 4: Reference Figure 8-Figure 9 , which is basically the same as Example 3, and further, a specific implementation plan for improving the liquid crushing effect is specifically added.

[0037] The gun barrel 2 is provided with a long rod 24 colinear with its axis, and a plurality of rotating disks 25 are rotatably mounted on the outer wall of the long rod 24. The outer walls of the plurality of rotating disks 25 are fixedly connected with a plurality of short plates 26 distributed circumferentially, and the side walls of the short plates 26 are provided with inclined surfaces 27 and through holes 28. The inclined surfaces 27 make the short plates 26 have the function of fan blades. The inner wall of the long rod 24 is fixedly connected with a cross bar 29, and the side wall of the cross bar 29 is provided with a slot. The long rod 24 is fixedly connected with an insert block 30 inserted in the slot. Specifically, when the mixture passes through the gun barrel 2, the flowing mixture will push the short plate 26 to revolve around the long rod 24 under the action of the inclined surface 27, and the through hole 28 on the outer wall of the short plate 26 will further break up the liquid, so that the atomization effect of the spray gun is further improved. When the short plate 26 needs to be taken out for cleaning or replacement, the gun barrel 2 is first disassembled, and then the long rod 24 is pulled to pull the plug 30 at the end of the long rod 24 out of the slot, thereby facilitating the maintenance of the short plate 26.

[0038] When the atomizing spray gun for flue gas treatment is used, the gas is transported to the second threaded tube 12 and the liquid is transported to the first threaded tube 11. The gas entering the second threaded tube 12 will enter the mixing chamber 8 through the fine hole 9, and the liquid entering the first threaded tube 11 will first enter the short tube 18, and then enter the mixing chamber 8 from the side hole 20 and the upper hole 21 on the short tube 18. The liquid will first be efficiently broken, and the three streams of liquid will be further broken by the gas entering the mixing chamber 8. During this period, the mutually perpendicular side holes 20 and the upper hole 21 will make the gas-liquid mixing effect better, so as to make the subsequent atomization effect better. The broken liquid will enter the inner tube 14 in the output port 31, and then enter the gun barrel 2, and then will be broken and atomized for the third time in the nozzle 5, and finally will be sprayed out from the spray port 23 of the nozzle 5. Under the three-time breaking action, the atomization particle size of the liquid is reduced, which significantly improves the atomization effect, thereby improving the utilization rate of the reducing agent.

[0039] When the mixture passes through the gun barrel 2, the flowing mixture will push the short plate 26 to revolve around the long rod 24 under the action of the inclined surface 27, and the through holes 28 on the outer wall of the short plate 26 will further break up the liquid, so that the atomization effect of the spray gun is further improved.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An atomizing spray gun for flue gas treatment, comprising a fixed base (1), characterized in that: The fixed base (1) has a tubular shape and further comprises: The mixer (4) and the nozzle (5) are connected to the two ends of the fixed base (1) respectively. The mixer (4) is provided with a mixing chamber (8) inside, and an air inlet (6) and an outlet (31) are provided at two ends of the mixer (4), respectively, and the air inlet (6) and the outlet (31) are both in communication with the mixing chamber (8); A liquid inlet (7) is arranged on the outer wall of the mixer (4). The liquid inlet (7) and the mixing chamber (8) are arranged vertically, the liquid inlet (7) and the mixing chamber (8) are connected via a mounting hole (10), and a porous component for dispersing liquid is provided in the mounting hole (10).

2. The atomizing spray gun for flue gas treatment according to claim 1, characterized in that: The porous component comprises a short tube (18) inserted into the mounting hole (10), the lower end of the short tube (18) being open, the upper end of the short tube (18) being provided with an upper hole (21) communicating with the mixing chamber (8), the outer wall of the short tube (18) being provided with symmetrically arranged side holes (20), the side holes (20) being connected with the mixing chamber (8), and the side holes (20) being perpendicular to the upper hole (21) and the air inlet (6).

3. The atomizing spray gun for flue gas treatment according to claim 1, characterized in that: The air inlet (6) and the mixing chamber (8) are connected via a fine hole (9), and both ends of the fine hole (9) are provided with chamfers.

4. The atomizing spray gun for flue gas treatment according to claim 1, characterized in that: A spray port (23) is provided at the end of the spray head (5), and the shape of the spray port (23) is conical or V-shaped.

5. The atomizing spray gun for flue gas treatment according to claim 2, characterized in that: The liquid inlet (7), the air inlet (6) and the outlet (31) are respectively threadedly connected with a first threaded tube (11), a second threaded tube (12) and a third threaded tube (13), and the liquid inlet (7), the air inlet (6) and the outlet (31) are each installed with a sealing ring (17).

6. The atomizing spray gun for flue gas treatment according to claim 2, characterized in that: The outer wall of the lower end of the short tube (18) is fixedly connected to a limit plate (19), a limit groove (22) is provided between the mounting hole (10) and the liquid inlet (7), and the limit plate (19) is clamped in the limit groove (22).

7. The atomizing spray gun for flue gas treatment according to claim 5, characterized in that: The internal fixed sleeve of the fixed base (1) is provided with a gun rod (2) penetrating through both ends thereof, the nozzle (5) is threadedly connected to one end of the gun rod (2), and the end of the fixed base (1) is threadedly connected to a protective sleeve (3) sleeved on the outer wall of the gun rod (2) and the nozzle (5), the protective sleeve (3) and the nozzle (5) are both made of TIC alloy steel, and the other end of the gun rod (2) is connected to a third threaded tube (13).

8. The atomizing spray gun for flue gas treatment according to claim 7, characterized in that: The gun barrel (2) is provided with a long rod (24) colinear with its axis, and a plurality of rotating disks (25) are rotatably mounted on the outer wall of the long rod (24). The outer walls of the plurality of rotating disks (25) are fixedly connected with a plurality of circumferentially distributed short plates (26), and the side walls of the short plates (26) are provided with inclined surfaces (27) and through holes (28).

9. The atomizing spray gun for flue gas treatment according to claim 8, characterized in that: The inner wall of the long rod (24) is fixedly connected to a cross rod (29), the side wall of the cross rod (29) is provided with a slot, and the long rod (24) is fixedly connected to an insert block (30) inserted into the slot.

10. The atomizing spray gun for flue gas treatment according to claim 7, characterized in that: An inner tube (14) is sleeved inside the third threaded tube (13); an annular plate (15) is fixedly connected to one end of the inner tube (14) close to the air inlet (6); the annular plate (15) is located between the third threaded tube (13) and the sealing ring (17); an annular groove (16) is provided on the outer wall of the inner tube (14) and the inner wall of the third threaded tube (13); the gun rod (2) is inserted into the annular groove (16) and is threadedly connected to the outer wall of the inner tube (14).

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