Furnace sncri denitration nozzle

Abstract

The utility model relates to the field of boiler denitration atomizing spray gun, especially to a furnace SNCR denitration spray head, aim at overcoming the technical problem that because of adopting the mixed cavity premixing mode in the related technology, the high pressure atomized material in the mixed cavity forms back pressure to the low pressure ammonia gas, thereby hindering the ammonia gas from entering the mixed cavity, and further making the ammonia gas unable to be smoothly sprayed. The furnace SNCR denitration spray head is provided with ammonia gas jet and atomized material jet which are respectively sprayed to the flow cone and flow to the spray hole along the flow cone. The negative pressure area formed by the impact position of high-speed atomized material jet on the flow cone is used to suck the ammonia gas jet into the atomized material jet for mixing and spraying together, without the need of mixed cavity premixing, avoiding the generation of back pressure, thereby improving the denitration effect. The technical problem that the existing denitration spray head adopts the mixed cavity premixing mode, the high pressure atomized material in the mixed cavity forms back pressure to the low pressure ammonia gas, thereby hindering the ammonia gas from entering the mixed cavity, and further making the ammonia gas unable to be smoothly sprayed is overcome.

Description

Technical Field

[0001] This utility model relates to the field of denitrification atomizing spray guns for furnaces and kilns, and particularly to a furnace and kiln SNCR denitrification nozzle. Background Technology

[0002] In the denitrification process of furnaces and kilns, in order to control the concentration of nitrogen atomized substances in the flue gas, ammonia gas needs to be atomized and sent into the flue gas duct through denitrification nozzles. Existing denitrification nozzles are equipped with a mixing chamber, whose function is to pre-mix ammonia gas with the atomized substance before spraying it out through the nozzle to achieve the atomization effect. Specifically, ammonia gas and the atomized substance are first transported to the mixing chamber for mixing, and the resulting mixture is then sprayed out through the nozzle. However, when the ammonia gas pressure and flow rate are low, because the pressure and flow rate of the atomized substance are much higher than that of the ammonia gas, a high-pressure zone is generated in the mixing chamber, which in turn creates back pressure, hindering the smooth flow of ammonia gas into the mixing chamber. Ultimately, this prevents the ammonia gas from being sprayed out normally and completing the atomization process.

[0003] Existing denitrification nozzles have a technical problem: the use of a mixing chamber premixing method causes the high-pressure atomized material in the mixing chamber to create back pressure on the low-pressure ammonia gas, thus hindering the ammonia gas from entering the mixing chamber and preventing the ammonia gas from being sprayed out smoothly. Utility Model Content

[0004] The purpose of this utility model is to provide a furnace SNCR denitrification nozzle to overcome the technical problem in related technologies where the high-pressure atomized material in the mixing chamber forms a back pressure on the low-pressure ammonia gas due to the use of a mixing chamber premixing method, thereby hindering the ammonia gas from entering the mixing chamber and thus preventing the ammonia gas from being sprayed out smoothly.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] The SNCR denitrification nozzle for furnaces and kilns provided by this utility model includes:

[0007] A nozzle and a flow-dividing spray cap are provided, the flow-dividing spray cap being installed on the nozzle, which has an ammonia gas nozzle and an atomized substance nozzle. The flow-dividing spray cap has a guide cone and an outlet hole, the guide cone being axially aligned with the ammonia gas nozzle. The ammonia jet ejected from the ammonia gas nozzle and the atomized substance jet ejected from the atomized substance nozzle respectively impact the tip and sidewall of the guide cone, and are guided by the guide cone, moving along the outer wall of the guide cone towards the outlet hole, and exiting from the outlet hole. The velocity of the atomized substance jet is greater than the velocity of the ammonia gas jet, and a negative pressure zone is formed at the impact position of the atomized substance jet on the guide cone. This negative pressure is used to draw the ammonia gas jet into the atomized substance jet and mix it.

[0008] Specifically, the ammonia nozzle is located at the center of the nozzle, and multiple atomizing nozzles and multiple ejection holes correspond one-to-one and are evenly distributed around the axis of the guide cone. The ejection holes are inclined and fit against the sidewall of the guide cone to guide the fluid flowing along the outer wall of the guide cone to the ejection holes.

[0009] Specifically, the atomizing nozzle is inclined towards the ammonia nozzle along the ejection direction, so that the impact position of the atomizing jet on the guide cone is close to the ammonia nozzle, thereby making the generated negative pressure zone closer to the ammonia nozzle and shortening the distance between the ammonia jet and the atomizing jet.

[0010] Specifically, the impact position of the atomized jet on the guide cone is located at the inlet of the nozzle. The atomized jet forms a negative pressure zone at the inlet of the nozzle, which enhances the entrainment effect of the negative pressure zone on the ammonia jet.

[0011] Specifically, the impact angle between the atomized jet and the guide cone is set to an acute angle, making it easier for the atomized jet to flow along the conical sidewall of the guide cone towards the nozzle, while preventing the backflow of the atomized jet into the ammonia nozzle.

[0012] Specifically, the nozzle is further provided with a conical opening, which is located at the end of the ammonia gas nozzle and is spaced apart from the guide cone. The ammonia jet is ejected from the gap between the guide cone and the conical opening, thereby precisely delivering the ammonia jet into the negative pressure zone, and thus achieving the mixing of the ammonia jet and the atomized jet.

[0013] Specifically, the gap between the guide cone and the cone opening is smaller than the size of the nozzle, thereby preventing the backflow of the atomized jet into the ammonia nozzle and further reducing the impact of the backflow of the atomized jet on the ammonia jet.

[0014] Specifically, it also includes a supply pipe, which comprises a nozzle base, an ammonia gas pipe, and an atomizing material pipe. The nozzle base is connected to the ammonia gas pipe, forming an ammonia fluid channel. The nozzle base is connected to the atomizing material pipe, forming an atomized material channel. The nozzle base is installed at the end of the nozzle furthest from the diverter cap. The ammonia fluid channel is connected to the ammonia nozzle, and the atomized material channel is connected to the atomizing nozzle. The ammonia fluid channel and the atomized material channel are not connected.

[0015] Specifically, the nozzle base is provided with an ammonia fluid orifice and an atomized material orifice. The ammonia fluid orifice is located at the center of the nozzle base, and multiple atomized material orifices are evenly distributed around the axis of the ammonia fluid orifice. The ammonia tube is inserted into the atomized material tube, dividing the diameter of the atomized material tube into a non-connected central region and an annular region. The central region communicates with the ammonia fluid orifice to form the ammonia fluid channel. The annular region communicates with each of the atomized material orifices to form the atomized material channel.

[0016] Specifically, the supply pipe further includes a connecting sealing plate, an ammonia pipe connector, and an atomizing tube connector. The connecting sealing plate is installed at the end of the atomizing tube away from the nozzle base and is sleeved on the ammonia pipe to seal the annular opening formed by the atomizing tube and the ammonia pipe, thereby sealing the annular region. The ammonia pipe connector is installed on the side of the connecting sealing plate away from the atomizing tube and is sleeved on the ammonia pipe, communicating with the central region. The atomizing tube connector is installed on the side wall of the atomizing tube and communicates with the annular region.

[0017] Based on the above technical solutions, the beneficial effects of this utility model are analyzed as follows:

[0018] This utility model provides a furnace SNCR denitrification nozzle, comprising:

[0019] A nozzle and a flow-dividing spray cap are provided, the flow-dividing spray cap being installed on the nozzle, which has an ammonia gas nozzle and an atomized substance nozzle. The flow-dividing spray cap has a guide cone and an outlet hole, the guide cone being axially aligned with the ammonia gas nozzle. The ammonia jet ejected from the ammonia gas nozzle and the atomized substance jet ejected from the atomized substance nozzle respectively impact the tip and sidewall of the guide cone, and are guided by the guide cone, moving along the outer wall of the guide cone towards the outlet hole, and exiting from the outlet hole. Because the pressure of the atomized substance jet is greater than that of the ammonia gas jet, and the impact position of the atomized substance jet on the guide cone is closer to the outlet hole than that of the ammonia gas jet, the atomized substance jet creates a negative pressure on the ammonia gas jet, the negative pressure being used to draw the ammonia gas jet into the atomized substance jet and mix it.

[0020] In practical applications, the ammonia jet ejected from the ammonia nozzle impacts the tip of the guide cone, moves along the outer wall of the guide cone towards the ejection hole, and is ejected from the ejection hole. Similarly, the atomized jet ejected from the atomizing nozzle impacts the conical sidewall of the guide cone, moves along the outer wall of the guide cone towards the ejection hole, and is ejected from the ejection hole.

[0021] Because the pressure of the atomized jet is greater than that of the ammonia jet, and the impact position of the atomized jet on the guide cone is closer to the nozzle than that of the ammonia jet on the guide cone, a local negative pressure zone is formed at the impact position of the atomized jet on the guide cone. The negative pressure in the negative pressure zone draws the ammonia jet into the atomized jet and completes the mixing, and then sprays it out together through the nozzle.

[0022] As can be seen, compared with existing technologies, the SNCR denitrification nozzle of this furnace is equipped with an ammonia jet and an atomized jet, which are respectively sprayed towards the guide cone and guided by the guide cone to be ejected from the nozzle orifice. The negative pressure zone formed at the impact position of the high-speed atomized jet on the guide cone is used to entrain the ammonia jet into the atomized jet for mixing and then ejecting them together. Premixing in a mixing chamber is not required, thus avoiding back pressure and improving the denitrification effect.

[0023] This invention overcomes the technical problem of existing denitrification nozzles, where the use of a mixing chamber premixing method causes high-pressure atomized substances in the mixing chamber to create back pressure on low-pressure ammonia, thus hindering ammonia from entering the mixing chamber and preventing ammonia from being sprayed out smoothly. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the structure of the SNCR denitrification nozzle for furnaces provided in this embodiment of the present invention.

[0026] icon:

[0027] 100. Nozzle; 101. Ammonia nozzle; 102. Atomized material nozzle; 103. Conical nozzle;

[0028] 200. Flow divider cap; 201. Flow guide cone; 202. Spray hole;

[0029] 300, Supply pipe; 310, Nozzle base; 301, Ammonia fluid hole; 302, Atomized material hole; 320, Ammonia pipe; 330, Atomized material pipe; 340, Connecting sealing plate; 350, Ammonia pipe connector; 360, Atomized material pipe connector. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] Existing denitrification nozzles have a technical problem: the use of a mixing chamber premixing method causes the high-pressure atomized material in the mixing chamber to create back pressure on the low-pressure ammonia gas, thus hindering the ammonia gas from entering the mixing chamber and preventing the ammonia gas from being sprayed out smoothly.

[0034] In view of this, the present invention provides a furnace SNCR denitrification nozzle, comprising:

[0035] A nozzle 100 and a flow-dividing nozzle 200 are provided. The flow-dividing nozzle 200 is installed on the nozzle 100, which has an ammonia nozzle 101 and an atomizing nozzle 102. The flow-dividing nozzle 200 has a guide cone 201 and an outlet hole 202, with the guide cone 201 axially aligned with the ammonia nozzle 101. The ammonia jet ejected from the ammonia nozzle 101 and the atomizing jet ejected from the atomizing nozzle 102 impact the tip and sidewall of the guide cone 201, respectively, and are guided by the guide cone 201, moving along the outer wall of the guide cone 201 towards the outlet hole 202, and exiting from the outlet hole 202. The velocity of the atomizing jet is greater than that of the ammonia jet, and a negative pressure zone is formed at the impact position of the atomizing jet on the guide cone 201. This negative pressure is used to draw the ammonia jet into the atomizing jet and mix it.

[0036] Based on the above technical solutions, the SNCR denitrification nozzle for furnaces and kilns provided by this utility model can achieve the following technical effects:

[0037] The SNCR denitrification nozzle of this furnace is equipped with an ammonia jet and an atomized jet, which are respectively injected into a guide cone 201 and flow along the side wall of the guide cone 201 towards the nozzle 202. The negative pressure zone formed by the impact position of the high-speed atomized jet on the guide cone 201 is used to entrain the ammonia jet into the atomized jet for mixing and then spraying it out together. Premixing in the mixing chamber is not required, thus avoiding back pressure and improving the denitrification effect. This overcomes the technical problem of existing denitrification nozzles, where the high-pressure atomized material in the mixing chamber creates back pressure on the low-pressure ammonia gas due to the premixing method, thereby hindering the ammonia gas from entering the mixing chamber and preventing it from being sprayed out smoothly.

[0038] The following combination Figure 1 The structure and shape of the SNCR denitrification nozzle for furnaces and kilns provided in this embodiment are described in detail below:

[0039] In this embodiment, the ammonia nozzle 101 is located at the center of the nozzle 100, and multiple atomizing nozzles 102 and multiple ejection holes 202 correspond one-to-one and are evenly distributed around the axis of the guide cone 201. The ejection holes 202 are inclined and fit against the side wall of the guide cone 201 to guide the fluid flowing along the outer wall of the guide cone 201 to the ejection holes 202.

[0040] Regarding the structural composition of nozzle 100, specifically:

[0041] To improve the suction efficiency of the ammonia jet under negative pressure, in this embodiment, the atomizing nozzle 102 is tilted towards the ammonia nozzle 101 along the ejection direction, so that the impact position of the atomizing jet on the guide cone 201 is close to the ammonia nozzle 101. This makes the generated negative pressure zone closer to the ammonia nozzle 101, shortens the distance between the ammonia jet and the atomizing jet, enhances the suction effect of ammonia, and improves the mixing efficiency.

[0042] To further improve the suction efficiency of the ammonia jet under negative pressure, in this embodiment, the impact position of the atomized jet on the guide cone 201 is located at the inlet of the nozzle 202. The atomized jet forms a negative pressure zone at the inlet of the nozzle 202, which enhances the entrainment effect of the negative pressure zone on the ammonia jet, thereby more effectively sucking in the ammonia jet and mixing it with the atomized jet.

[0043] To reduce backflow and diversion when the atomized jet impacts the guide cone 201, in this embodiment, the impact angle between the atomized jet and the guide cone 201 is set to an acute angle. This reduces backflow and diversion caused by the impact, making it easier for the atomized jet to flow along the conical sidewall of the guide cone 201 towards the nozzle 202, while preventing the backflow of the atomized jet from flowing back into the ammonia nozzle 101.

[0044] To improve the efficiency of ammonia jetting into the negative pressure zone and shorten the required mixing time, in this embodiment, the nozzle 100 is further provided with a conical opening 103. The conical opening 103 is located at the end of the ammonia nozzle 101 and is spaced apart from the guide cone 201. The ammonia jet is ejected from the gap between the guide cone 201 and the conical opening 103, thereby accurately delivering the ammonia jet into the negative pressure zone, and thus achieving efficient mixing of the ammonia jet and the atomized jet.

[0045] To further reduce the interference of the atomized jet backflow on the ammonia jet, in this embodiment, the gap between the guide cone 201 and the cone opening 103 is smaller than the size of the nozzle 202, thereby preventing the atomized jet backflow from entering the ammonia nozzle 101 and further reducing the impact of the atomized jet backflow on the ammonia jet.

[0046] In this embodiment, a supply pipe 300 is also included, comprising a nozzle base 310, an ammonia pipe 320, and an atomizing material pipe 330. The nozzle base 310 is connected to the ammonia pipe 320, forming an ammonia fluid channel. The nozzle base 310 is connected to the atomizing material pipe 330, forming an atomized material channel. The nozzle base 310 is installed at the end of the nozzle 100 away from the diverter cap 200. The ammonia fluid channel is connected to the ammonia nozzle 101, and the atomized material channel is connected to the atomizing nozzle 102. The ammonia fluid channel and the atomized material channel are not connected.

[0047] In this embodiment, the nozzle base 310 is provided with an ammonia fluid orifice 301 and atomized material orifices 302. The ammonia fluid orifice 301 is located at the center of the nozzle base 310, and multiple atomized material orifices 302 are evenly distributed around the axis of the ammonia fluid orifice 301. An ammonia tube 320 is inserted into the atomized material tube 330, dividing the diameter of the atomized material tube 330 into a non-connected central region and an annular region. The central region is connected to the ammonia fluid orifice 301, forming an ammonia fluid channel. The annular region is connected to each atomized material orifice 302, forming an atomized material channel. The dimensions of the ammonia tube 320 and the atomized material tube 330 should be such that the diameter ratio of the central region and the annular region matches the flow rate ratio of ammonia to atomized material.

[0048] In this embodiment, the supply pipe 300 further includes a connecting sealing plate 340, an ammonia pipe connector 350, and an atomizing pipe connector 360. The connecting sealing plate 340 is installed at the end of the atomizing pipe 330 away from the nozzle base 310 and is sleeved on the ammonia pipe 320 to seal the annular opening formed by the atomizing pipe 330 and the ammonia pipe 320, thereby sealing the annular area. The ammonia pipe connector 350 is installed on the side of the connecting sealing plate 340 away from the atomizing pipe 330 and is sleeved on the ammonia pipe 320, communicating with the central area. The atomizing pipe connector 360 is installed on the side wall of the atomizing pipe 330 and communicates with the annular area.

[0049] In summary, the specific working process of the SNCR denitrification nozzle for furnaces and kilns provided in this embodiment is as follows:

[0050] The ammonia fluid channel consists of an ammonia pipe connector 350, an ammonia pipe 320, an ammonia fluid hole 301, and an ammonia nozzle 101 connected in sequence. The ammonia supplied by the ammonia fluid channel is ejected from the ammonia nozzle 101 to form an ammonia jet that impacts the guide cone 201.

[0051] The atomized material channel consists of atomized material pipe connector 360, an ammonia pipe 320, an annular area between the ammonia pipe 320, an atomized material orifice 302, and an atomized material nozzle 102 connected in sequence. The atomized material provided by the atomized material channel is ejected from the atomized material nozzle 102 to form an atomized material jet that impacts the guide cone 201.

[0052] The ammonia jet ejected from ammonia nozzle 101 impacts the tip of guide cone 201 and exits through the gap between cone 103 and guide cone 201. Guided by guide cone 201, the ammonia jet moves along the outer wall of guide cone 201 towards the ejection hole 202 and is ejected from ejection hole 202. The atomized jet ejected from atomized nozzle 102 impacts the conical sidewall of guide cone 201 and, guided by guide cone 201, moves along the outer wall of guide cone 201 towards the ejection hole 202 and is ejected from ejection hole 202. The impact point of the atomized jet on guide cone 201 is also the inlet of ejection hole 202.

[0053] Because the pressure of the atomized jet is greater than that of the ammonia jet, and the impact position of the atomized jet on the guide cone 201 is closer to the nozzle 202 than that of the ammonia jet on the guide cone 201, a local negative pressure zone is formed at the inlet of the nozzle 202. The negative pressure of the negative pressure zone draws the ammonia jet into the atomized jet and completes the mixing, and then sprays it out together through the nozzle 202.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A furnace / kiln SNCR denitrification nozzle, characterized in that, include: A nozzle (100) and a flow divider cap (200), wherein the flow divider cap (200) is installed on the nozzle (100), and the nozzle (100) is provided with an ammonia nozzle (101) and an atomized material nozzle (102); The diversion nozzle (200) is provided with a guide cone (201) and an outlet hole (202), and the guide cone (201) is axially aligned with the ammonia nozzle (101); The ammonia jet ejected from the ammonia nozzle (101) and the atomized jet ejected from the atomized nozzle (102) respectively impact the tip and sidewall of the guide cone (201), and are guided by the guide cone (201) to move along the outer wall of the guide cone (201) towards the ejection hole (202), and are ejected from the ejection hole (202); The velocity of the atomized jet is greater than that of the ammonia jet. A negative pressure zone is formed at the impact position of the atomized jet on the guide cone (201). The negative pressure is used to draw the ammonia jet into the atomized jet and mix it.

2. The furnace SNCR denitrification nozzle according to claim 1, characterized in that: The ammonia nozzle (101) is located at the center of the nozzle (100), and the plurality of atomizing nozzles (102) and the plurality of ejection holes (202) correspond one-to-one and are evenly distributed around the axis of the guide cone (201); The ejector hole (202) is inclined and fits against the side wall of the guide cone (201) to guide the fluid flowing along the outer wall of the guide cone (201) to the ejector hole (202).

3. The furnace SNCR denitrification nozzle according to claim 2, characterized in that: The atomizing nozzle (102) is inclined towards the ammonia nozzle (101) along the ejection direction, so that the impact position of the atomizing jet on the guide cone (201) is close to the ammonia nozzle (101), thereby making the generated negative pressure zone closer to the ammonia nozzle (101).

4. The furnace SNCR denitrification nozzle according to claim 3, characterized in that: The impact position of the atomized jet on the guide cone (201) is located at the inlet of the nozzle (202). The atomized jet forms a negative pressure zone at the inlet of the nozzle (202), which enhances the entrainment effect of the negative pressure zone on the ammonia jet.

5. The furnace SNCR denitrification nozzle according to claim 4, characterized in that: The impact angle between the atomized jet and the guide cone (201) is set to an acute angle, which makes it easier for the atomized jet to flow along the conical sidewall of the guide cone (201) towards the nozzle (202), while preventing the backflow of the atomized jet into the ammonia nozzle (101).

6. The furnace SNCR denitrification nozzle according to claim 5, characterized in that: The nozzle (100) is also provided with a conical opening (103), which is located at the end of the ammonia nozzle (101) and is spaced apart from the guide cone (201); The ammonia jet is ejected from the gap between the guide cone (201) and the cone opening (103), thereby accurately delivering the ammonia jet into the negative pressure zone, and thus achieving the mixing of the ammonia jet and the atomized jet.

7. The furnace SNCR denitrification nozzle according to claim 6, characterized in that: The gap between the guide cone (201) and the cone opening (103) is smaller than the size of the nozzle (202), thereby preventing the atomized jet from flowing back into the ammonia nozzle (101).

8. The furnace SNCR denitrification nozzle according to claim 2, characterized in that: It also includes a supply pipe (300), which includes a nozzle base (310), an ammonia pipe (320), and an atomizing pipe (330); The nozzle base (310) is connected to the ammonia pipe (320) to form an ammonia fluid channel; The nozzle base (310) is connected to the atomizing tube (330) to form an atomizing material channel; The nozzle base (310) is installed at the end of the nozzle (100) away from the diverter cap (200). The ammonia fluid channel is connected to the ammonia nozzle (101), and the atomized material channel is connected to the atomized material nozzle (102). The ammonia fluid channel and the atomized material channel are not connected.

9. The furnace SNCR denitrification nozzle according to claim 8, characterized in that: The nozzle base (310) is provided with an ammonia fluid hole (301) and an atomized material hole (302). The ammonia fluid hole (301) is located at the center of the nozzle base (310), and a plurality of atomized material holes (302) are evenly distributed around the axis of the ammonia fluid hole (301). The ammonia tube (320) is inserted into the atomizing tube (330), and divides the diameter of the atomizing tube (330) into a non-connected central region and an annular region; The central region is connected to the ammonia fluid hole (301) to form the ammonia fluid channel; The annular region is connected to each of the atomized material holes (302) to form the atomized material channel.

10. The furnace SNCR denitrification nozzle according to claim 9, characterized in that: The supply pipe (300) also includes a connecting sealing plate (340), an ammonia pipe connector (350), and an atomized material pipe connector (360); The connecting sealing plate (340) is installed at the end of the atomizing tube (330) away from the nozzle base (310) and sleeved on the ammonia tube (320) to block the annular opening formed by the atomizing tube (330) and the ammonia tube (320), thereby sealing the annular area. The ammonia pipe connector (350) is installed on the side of the connecting sealing plate (340) away from the atomizing tube (330) and sleeved on the ammonia tube (320). The ammonia pipe connector (350) is connected to the central area. The atomizing tube connector (360) is installed on the side wall of the atomizing tube (330) and communicates with the annular area.

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