Pneumatic atomization fan-shaped spraying device

Abstract

A pneumatic atomization fan-shaped spraying device comprises a gun barrel, a first-stage atomization device and a second-stage atomization device. A compressed air guide pipe and a gun barrel solution flow channel are arranged on the gun barrel, a solution flow section flow channel is arranged between a first-stage atomizing nozzle and a first-stage atomizing shell of the first-stage atomizing device, and the first-stage atomizing nozzle is fixedly connected with the compressed air guide pipe. And the second-stage atomization device comprises a second-stage connecting pipe connected to the first-stage atomization shell and a second-stage atomization nozzle connected to the second-stage connecting pipe, and the spraying end of the second-stage atomization nozzle is of a flat structure. The two-stage atomizing nozzles are arranged on the spraying device, so that the solution spraying flow of the spraying device can be adjusted, the solution flow can be uniformly distributed during parallel operation of the multiple spraying guns, meanwhile, the spraying form of the solution can be in a flat fan shape through the two-stage atomizing nozzles, flue gas can be well covered, a denitration medium can be well mixed with the flue gas, and higher denitration efficiency is obtained.

Description

Technical Field

[0001] The utility model relates to the field of stock removal, in particular to a pneumatic atomization fan-shaped injection device. Background Art

[0002] Selective non-catalytic reduction (SNCR) refers to the process of reducing nitrogen oxides in flue gas to harmless nitrogen and water by injecting a reducing agent into a "temperature window" suitable for denitrification reaction without the action of a catalyst. This technology generally uses ammonia, urea or hydroxyamine as a reducing agent to reduce NOx in the furnace. In the original injection technology, the medium flow hole adopts a fixed size, and the relative position of the nozzle and the nozzle housing is fixed and cannot be adjusted. This structure is easily affected by processing errors and assembly errors and is prone to inconsistent solution flow rates of each spray gun, that is, when multiple spray guns are operated in parallel, the solution flow rates of each spray gun are inconsistent when the same amount of compressed air is given. At present, throttling adjustment is performed by connecting a valve in series at the front end of the spray gun medium inlet, but due to factors such as valve diameter, the actual performance is not ideal.

[0003] At the same time, in the original injection technology, the solution is cone-shaped after injection, and the cone angle is small, resulting in a limited contact area between the working medium and the vertical flue gas after atomization. At the same time, the boiler flue gas mostly flows in parallel in the SNCR reaction zone, which further causes the flue gas to not mix well with the denitrification medium, thereby affecting the denitrification efficiency, becoming a problem that troubles users and manufacturers. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pneumatic atomization fan-shaped spray device to solve the technical problems raised in the above-mentioned background technology.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A pneumatic atomization fan-shaped spray device comprises a gun barrel, a primary atomization device and a secondary atomization device; the gun barrel comprises a sealed shell and a compressed air conduit movably mounted in the sealed shell, a solution conduit is fixed on the sealed shell, and a gun barrel solution flow channel is formed between the inner wall of the solution conduit and the outer wall of the compressed air conduit.

[0007] The primary atomizing device comprises a primary atomizing shell and a primary atomizing nozzle coaxially mounted on the primary atomizing shell, the primary atomizing nozzle is fixedly connected to a compressed air conduit, a primary atomizing nozzle is provided with a primary atomizing nozzle compressed air flow channel connected to the compressed air conduit, and a primary pressurized atomizing chamber is provided on the primary atomizing shell, which is directly opposite to the primary atomizing nozzle compressed air flow channel and connected to a barrel solution flow channel; the primary atomizing nozzle comprises a conical section and a cylindrical section, the primary atomizing nozzle is gap-fitted in the primary atomizing shell, and a solution flow cross-section flow channel connected to the primary pressurized atomizing chamber is formed between the outer conical surface of the primary atomizing nozzle conical section and the inner conical surface of the primary atomizing shell.

[0008] The secondary atomizing device comprises a secondary connecting pipe connected to the primary atomizing housing and a secondary atomizing nozzle connected to the secondary connecting pipe, wherein the injection end of the secondary atomizing nozzle is a flat structure.

[0009] In the above-mentioned utility model, further, a first-stage nozzle outer circumferential solution flow channel connected to the barrel solution flow channel is arranged on the outer cylindrical surface of the first-stage atomizing nozzle cylindrical section, and a first-stage atomizing shell shoulder solution flow channel respectively connected to the solution flow section flow channel and the first-stage nozzle outer circumferential solution flow channel is arranged on the shoulder of the first-stage atomizing shell.

[0010] In the above utility model, further, a threaded seat coaxial with the primary atomizing shell is fixedly provided on the primary atomizing shell, the solution conduit is threadedly connected to the outer wall of the threaded seat, the primary atomizing nozzle is threadedly connected to the inner wall of the threaded seat, and the threaded seat is provided with a threaded seat solution flow channel which is respectively connected to the barrel solution flow channel and the outer circumferential solution flow channel of the primary nozzle.

[0011] In the above utility model, further, the end of the compressed air conduit away from the primary atomizing nozzle is connected to a locking nut abutting against the side wall of the sealing shell, and the end of the compressed air conduit away from the primary atomizing nozzle is provided with a flat rotating head.

[0012] In the above utility model, further, a solution connector connected to the solution flow channel of the gun barrel is fixedly arranged on the solution conduit, a compressed air sealing flow channel connected to the compressed air conduit is arranged on the compressed air conduit, and a compressed air connector connected to the compressed air sealing flow channel is fixedly connected to the sealing shell.

[0013] In the above utility model, further, a cylindrical groove is provided in the compressed air sealing flow channel area of ​​the compressed air conduit.

[0014] In the above utility model, further, sealing rings are arranged on the inner walls of the compressed air conduits on both sides of the compressed air sealing flow channel.

[0015] The beneficial effects of the utility model are:

[0016] The present application can adjust the cross-sectional size of the solution flow channel through a compressed air duct, and then adjust the solution injection flow rate of the injection device, so that the solution flow rate can be evenly distributed when multiple spray guns are operated in parallel. At the same time, the two-stage atomizing nozzle can make the solution injection shape flat fan-shaped, which can cover the flue gas well, so that the denitrification medium can be well mixed with the flue gas, and a higher denitrification efficiency can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of the barrel of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of part A;

[0020] Figure 4 for Figure 2 A partial enlarged view of part B;

[0021] Figure 5 It is a cross-sectional view of the primary atomization device of the utility model;

[0022] Figure 6 It is a cross-sectional view of the two-stage atomization device of the utility model;

[0023] Figure 7 for Figure 6 A partial enlarged view of part C in the middle;

[0024] Figure 8 It is a cross-sectional view of the first-stage atomizing nozzle of the utility model;

[0025] Fig. 9 for Figure 8 Bottom view of

[0026] Fig.10 It is a cross-sectional view of the threaded seat of the utility model;

[0027] Fig.11 for Fig.10 A top view of

[0028] Fig.12 It is a cross-sectional view of the utility model;

[0029] Fig.13 for Fig.12 A partial enlarged view of part D in the middle;

[0030] Fig.14 for Fig.12 A partial enlarged view of part E in the middle;

[0031] Fig.15 for Fig.12 A partial enlarged view of part F in the middle.

[0032] In the figure, 1-gun barrel, 2-primary atomizing device, 3-secondary atomizing device, 101-solution connector, 102-compressed air connector, 103-locking nut, 104-sealing shell, 105-compressed air conduit, 106-solution conduit, 107-cylindrical groove, 108-sealing ring, 109-flat rotor, 201-threaded seat, 202-primary atomizing shell, 203-primary atomizing nozzle, 301-secondary connecting pipe, 302-secondary atomizing nozzle, A01-compressed air sealing flow channel, A02-gun barrel compressed air flow channel, A03-gun barrel solution flow channel, B01-threaded seat solution flow channel, B02-primary nozzle outer circumference solution flow channel, B03-primary atomizing shell shoulder solution flow channel, B04-solution flow cross-section flow channel, B05-primary atomizing nozzle compressed air flow channel, B06-primary pressurized atomizing chamber, C01-primary atomizing solution flow channel. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0035] Embodiment 1:

[0036] A pneumatic atomizing fan-shaped spray device, see attached Figure 1 As shown, it includes a gun barrel 1, a primary atomizing device 2 and a secondary atomizing device 3; see the attached Figure 2 As shown, the gun barrel 1 includes a sealed housing 104 and a compressed air conduit 105 movably mounted inside the sealed housing 104, and a solution conduit 106 is fixed to the sealed housing 104. Fig.12As shown, a barrel solution flow channel A03 is formed between the inner wall of the solution conduit 106 and the outer wall of the compressed air conduit 105, and the inner cavity of the compressed air conduit 105 is a barrel compressed air flow channel A02.

[0037] See attached Figure 5 As shown, the primary atomizing device 2 includes a primary atomizing housing 202 and a primary atomizing nozzle 203 coaxially mounted on the primary atomizing housing 202. Fig.12 As shown, the primary atomizing nozzle 203 is fixedly connected to the compressed air conduit 105. Fig.13 As shown, the primary atomizing nozzle 203 is provided with a primary atomizing nozzle compressed air flow channel B05 which is connected to the barrel compressed air flow channel A02 of the compressed air conduit 105. The primary atomizing housing 202 is provided with a primary pressurized atomizing chamber B06 which is directly opposite to the primary atomizing nozzle compressed air flow channel B05 and is connected to the barrel solution flow channel A03. The primary atomizing nozzle 203 specifically includes a conical section and a cylindrical section, and the primary atomizing nozzle 203 is loosely fitted in the primary atomizing housing 202. Fig.13 As shown, a solution flow channel B04 connected to the primary pressurized atomizing chamber B06 is formed between the outer conical surface of the conical section of the primary atomizing nozzle 203 and the inner conical surface of the primary atomizing housing 202. When the primary atomizing nozzle 203 moves to the left, the cross-sectional area of ​​the solution flow channel B04 becomes smaller. Similarly, when the primary atomizing nozzle 203 moves to the right, the cross-sectional area of ​​the solution flow channel B04 becomes larger. During use, by adjusting the position of the primary atomizing nozzle 203 in the primary atomizing housing 202, the purpose of adjusting the solution injection flow rate of the injection device is achieved.

[0038] See attached Figure 6 and attached Fig.12 As shown, the secondary atomization device 3 includes a secondary connecting pipe 301 connected to the primary atomization housing 202 and a secondary atomization nozzle 302 connected to the secondary connecting pipe 301. Figure 7 As shown, the injection end of the secondary atomizing nozzle 302 is a flat structure.

[0039] Continue to refer to the attached Figure 2 and attached Fig.12 As shown, a solution connector 101 connected to the gun barrel solution flow channel A03 is fixedly provided on the solution conduit 106. Fig.15 As shown, the compressed air conduit 105 is provided with a barrel compressed air flow channel A02 and a communicating compressed air sealing flow channel A01. Figure 3 As shown, a cylindrical groove 107 is provided in the compressed air sealing flow channel A01 area of ​​the compressed air conduit 105 to ensure the cross-sectional area for compressed air circulation.

[0040] As attached Figure 2 As shown, a compressed air connector 102 communicating with the compressed air sealing flow channel A01 is fixedly connected to the sealed housing 104. Figure 4 As shown, sealing rings 108 are provided on the inner walls of the compressed air conduits 105 on both sides of the compressed air sealing flow channel A01 to prevent the compressed air in the compressed air sealing flow channel A01 from leaking to the barrel solution flow channel A03 or leaking to the outside.

[0041] In the specific implementation process of the pneumatic atomization fan-shaped spray device provided by the present application, the solution is connected through the solution connector 101, and the compressed air is connected through the compressed air connector 102. The compressed air enters the barrel compressed air flow channel A02 through the compressed air sealing flow channel A01, and finally enters the primary atomizing nozzle compressed air flow channel B05 of the primary atomizing nozzle 203. The solution enters the solution flow cross-sectional flow channel B04 through the barrel solution flow channel A03, and finally flows into the primary pressurized atomizing chamber B06. The solution in the primary pressurized atomizing chamber B06 is primarily atomized under the action of the compressed air in the primary atomizing nozzle compressed air flow channel B05. The solution after the primary atomization enters the primary atomizing solution flow channel C01 of the secondary connecting pipe 301. Finally, the primary atomized solution is sprayed after the flow direction setting and secondary atomization of the secondary atomizing nozzle 302. During the spraying process, the flat structure of the secondary atomizing nozzle 302 shapes the atomized liquid into a flat fan shape. In this process, the compressed air conduit 105 drives the primary atomizing nozzle 203 to move leftward or rightward along the primary atomizing housing 202 to adjust the cross-sectional area of ​​the solution flow channel B04, thereby achieving the purpose of adjusting the solution injection flow rate of the injection device.

[0042] Embodiment 2:

[0043] In this embodiment, see the attached Figure 8 , Attachment Fig. 9 And attached Fig.14 As shown, in order to ensure the flow cross-sectional area of ​​the solution in the clearance fit area between the primary atomizing nozzle 203 and the primary atomizing housing 202, a primary nozzle outer circumferential solution flow channel B02 connected to the barrel solution flow channel A03 is provided on the outer cylindrical surface of the cylindrical section of the primary atomizing nozzle 203. Secondly, in order to ensure the continuity of the solution entering the solution flow cross-sectional flow channel B04, refer to the attached Fig.12 As shown, the shoulder of the primary atomizing shell 202 is provided with a primary atomizing shell shoulder solution flow channel B03 which is respectively connected to the solution flow cross-sectional flow channel B04 and the primary nozzle outer circumferential solution flow channel B02. The primary atomizing shell shoulder solution flow channel B03 can buffer the solution to ensure the continuity of the solution entering the solution flow cross-sectional flow channel B04.

[0044] Further, in this embodiment, in order to better adjust the cross-sectional area of ​​the solution flow channel B04 by adjusting the position of the primary atomizing nozzle 203, continue to refer to the attached Figure 5 and attached Fig.12 As shown, a threaded seat 201 coaxial with the primary atomizing housing 202 is fixedly arranged on the primary atomizing housing 202, the solution conduit 106 is threadedly connected to the outer wall of the threaded seat 201, and the primary atomizing nozzle 203 is threadedly connected to the inner wall of the threaded seat 201. Fig.10 and attached Fig.11 As shown, the threaded seat 201 is provided with a threaded seat solution flow channel B01 which is respectively connected with the gun barrel solution flow channel A03 and the first-level nozzle outer circumference solution flow channel B02. During use, the first-level atomizing nozzle 203 can be driven to move along the length direction of the internal thread of the threaded seat 201 by rotating the end of the rotating compressed air conduit 105, thereby adjusting the cross-sectional area of ​​the solution flow channel B04. The solution in the gun barrel solution flow channel A03 can enter the first-level nozzle outer circumference solution flow channel B02, the first-level atomizing housing shoulder solution flow channel B03 and the solution flow channel B04 behind through the threaded seat solution flow channel B01 on the threaded seat 201.

[0045] For further information, see Appendix Figure 2 As shown, the end of the compressed air conduit 105 away from the primary atomizing nozzle 203 is connected to a locking nut 103 abutting against the side wall of the sealing housing 104. During implementation, when it is necessary to rotate the compressed air conduit 105, the locking nut 103 is loosened. When the primary atomizing nozzle 203 is adjusted to a suitable position, the locking nut 103 is tightened to prevent the compressed air conduit 105 from rotating during use. More preferably, a flat rotating head 109 is provided at the end of the compressed air conduit 105 away from the primary atomizing nozzle 203 to facilitate the twisting of the compressed air conduit 105.

[0046] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A pneumatic atomizing fan-shaped spray device, characterized in that: The invention comprises a gun barrel (1), a primary atomizing device (2) and a secondary atomizing device (3); the gun barrel (1) comprises a sealed shell (104) and a compressed air conduit (105) movably mounted inside the sealed shell (104); a solution conduit (106) is fixed to the sealed shell (104); a gun barrel solution flow channel (A03) is formed between the inner wall of the solution conduit (106) and the outer wall of the compressed air conduit (105); The primary atomizing device (2) comprises a primary atomizing housing (202) and a primary atomizing nozzle (203) coaxially mounted on the primary atomizing housing (202); the primary atomizing nozzle (203) is fixedly connected to a compressed air conduit (105); the primary atomizing nozzle (203) is provided with a primary atomizing nozzle compressed air flow channel (B05) communicating with the compressed air conduit (105); the primary atomizing housing (202) is provided with a primary atomizing nozzle compressed air flow channel (B05) directly facing the primary atomizing nozzle compressed air flow channel (B05) A first-stage pressurized atomizing chamber (B06) is provided which is connected to the first-stage pressurized atomizing chamber (B06) and the first-stage atomizing nozzle (203) includes a conical section and a cylindrical section. The first-stage atomizing nozzle (203) is fitted into the first-stage atomizing shell (202) with a clearance. A solution flow cross-section flow channel (B04) connected to the first-stage pressurized atomizing chamber (B06) is formed between the outer conical surface of the conical section of the first-stage atomizing nozzle (203) and the inner conical surface of the first-stage atomizing shell (202). The secondary atomization device (3) comprises a secondary connecting pipe (301) connected to the primary atomization housing (202) and a secondary atomization nozzle (302) connected to the secondary connecting pipe (301); the injection end of the secondary atomization nozzle (302) is a flat structure.

2. A pneumatic atomization fan-shaped spray device according to claim 1, characterized in that: A primary nozzle outer circumferential solution flow channel (B02) connected to a barrel solution flow channel (A03) is provided on the outer cylindrical surface of the cylindrical section of the primary atomizing nozzle (203), and a primary atomizing shell shoulder solution flow channel (B03) connected to a solution flow cross-sectional flow channel (B04) and the primary nozzle outer circumferential solution flow channel (B02) is provided on the shoulder of the primary atomizing shell (202).

3. A pneumatic atomization fan-shaped spray device according to claim 2, characterized in that: A threaded seat (201) coaxial with the primary atomizing shell (202) is fixedly provided on the primary atomizing shell (202); a solution conduit (106) is threadedly connected to the outer wall of the threaded seat (201); a primary atomizing nozzle (203) is threadedly connected to the inner wall of the threaded seat (201); and a threaded seat solution flow channel (B01) which is respectively connected to a gun barrel solution flow channel (A03) and a primary nozzle outer circumferential solution flow channel (B02) is provided on the threaded seat (201).

4. A pneumatic atomization fan-shaped spray device according to claim 3, characterized in that: The end of the compressed air conduit (105) away from the primary atomizing nozzle (203) is connected to a locking nut (103) abutting against the side wall of the sealing shell (104), and the end of the compressed air conduit (105) away from the primary atomizing nozzle (203) is provided with a flat rotating head (109).

5. The pneumatic atomization fan-shaped spray device according to claim 1, characterized in that: The solution conduit (106) is fixedly provided with a solution connector (101) in communication with the gun barrel solution channel (A03); the compressed air conduit (105) is provided with a compressed air sealing channel (A01) in communication with the compressed air conduit (105); and the sealing housing (104) is fixedly connected with a compressed air connector (102) in communication with the compressed air sealing channel (A01).

6. The pneumatic atomization fan-shaped spray device according to claim 5, characterized in that: A cylindrical groove (107) is provided in the compressed air sealing flow channel (A01) region of the compressed air conduit (105).

7. The pneumatic atomization fan-shaped spray device according to claim 6, characterized in that: Sealing rings (108) are provided on the inner walls of the compressed air conduits (105) on both sides of the compressed air sealing flow channel (A01).

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