Small-flow large-angle solution nozzle

Abstract

The utility model provides a small-flow large-angle solution nozzle. The small-flow large-angle solution nozzle comprises a flow regulating valve, a compressed air inlet, a urea solution inlet, a nozzle base and a solution nozzle body. The solution nozzle comprises a gas-mist mixing cabin and an atomizing nozzle; a compressed air inlet and a urea solution inlet are respectively formed in two opposite sides of the lower part of the nozzle base; a flow regulating valve is arranged at the bottom of the nozzle base; an atomizing nozzle is arranged at the top of the nozzle base, a urea solution outlet and compressed air outlets are formed in the atomizing nozzle, the urea solution outlet is located in the center of the atomizing nozzle, and the multiple compressed air outlets are arranged around the urea solution outlet at intervals. According to the small-flow and large-angle solution nozzle, small-distance and large-diffusion-surface dispersed spraying is achieved, urea atomized liquid drops sprayed to the wall of a pipeline can be effectively reduced, and corrosion of the solution to the pipeline is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of urea solution nozzles, and in particular relates to a small flow rate, large angle solution nozzle. Background Technology

[0002] Urea solution nozzles are widely used in the flue gas denitrification industry. Their main purpose is to spray the urea solution required for the denitrification process into the process pipeline. During spraying, the urea solution is atomized into fine droplets by the compressed air sprayed from the nozzle, which facilitates the vaporization, pyrolysis and denitrification reaction of the urea solution.

[0003] To cater to market demands, existing urea solution nozzles on the market typically have a spray length of around 3 meters and a coverage area diameter of approximately 0.5 to 1 meter, suitable for flues and conventional urea pyrolysis furnaces. However, in some confined engineering spaces where the urea pyrolysis furnace cannot be made very large, the aforementioned nozzles are not suitable for such conditions in order to ensure the residence time of the urea atomized solution within the furnace and to guarantee the efficiency of urea cracking. Utility Model Content

[0004] In view of this, the present invention aims to provide a small flow rate, large angle solution nozzle to shorten the atomization spray length, which can effectively reduce the amount of urea atomized droplets sprayed onto the pipe wall and reduce the corrosion of the pipe by the solution.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A small-flow, large-angle solution nozzle includes a flow regulating valve, a compressed air inlet, a urea solution inlet, a nozzle base, and a solution nozzle. The solution nozzle includes an aerosol mixing chamber and an atomizing nozzle. The lower part of the nozzle base has a compressed air inlet and a urea solution inlet on opposite sides, and a flow regulating valve is located at the bottom of the nozzle base. An atomizing nozzle is located at the top of the nozzle base, with a urea solution outlet and a compressed air outlet on the atomizing nozzle. The urea solution outlet is located at the center of the atomizing nozzle, and multiple compressed air outlets are spaced around the urea solution outlet. The atomizing nozzle connects to the aerosol mixing chamber, and the front end of the atomizing nozzle is connected to the atomizing nozzle, which has multiple atomizing nozzle holes.

[0007] A urea solution tube is inserted inside the nozzle base. The outer wall of the urea solution tube and the inner wall of the nozzle base form an annular compressed air channel. This compressed air channel is connected to the atomizing nozzle and is correspondingly provided with multiple compressed air outlets. One end of the urea solution tube is connected to the urea solution outlet, and the other end is connected to the urea solution inlet through an outlet pipe. The urea solution inlet is provided with a sealing ring.

[0008] Furthermore, the urea solution tube is positioned along the center of the compressed air channel.

[0009] Furthermore, the urea solution pipe and the outlet pipe are connected as an integral structure, and the integral structure is L-shaped.

[0010] Furthermore, the flow regulating valve is a needle-type flow regulating valve, which includes an adjusting nut, a screw, a fixing nut, and a valve plug. The valve plug is fitted at the connection between the urea solution pipe and the outlet pipe to regulate the flow rate in the urea solution pipe.

[0011] Furthermore, the nozzle base and the solution nozzle are detachably connected by internal and external threads.

[0012] Furthermore, the outer wall of the atomizing nozzle is provided with the external thread and the first nut, and the lower end of the aerosol mixing chamber is provided with the internal thread and the second nut.

[0013] Furthermore, the atomizing nozzle includes a spherical surface, and a plurality of atomizing nozzles are formed on the spherical surface and spaced apart around the top of the spherical surface.

[0014] Compared with existing technologies, the small-flow, large-angle solution nozzle of this invention has the following advantages:

[0015] The small-flow, large-angle solution nozzle of this invention, through the compressed air inlet, urea solution inlet, nozzle base, and solution nozzle on the solution nozzle, enables the injection of urea solution required for the denitrification process into the pipeline, and can shorten the atomization spray length, effectively reducing the amount of urea atomized droplets sprayed onto the pipeline wall and reducing the corrosion of the pipeline by the solution; by adjusting the flow rate in the urea solution pipe through the flow regulating valve, it can support the delivery of small-flow urea solution. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of the solution nozzle according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the nozzle base and solution nozzle assembly according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the atomizing nozzle structure according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the solution nozzle structure according to an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1-Flow regulating valve; 3-Urea solution inlet; 4-Sealing ring; 5-Outlet pipe; 6-Urea solution pipe; 7-Compressed air inlet; 8-Valve plug; 9-Nozzle base; 10-First nut; 11-Second nut; 12-Aerosol mixing chamber; 13-Atomizing nozzle; 15-Compressed air outlet; 16-Urea solution outlet; 18-Atomizing nozzle; 19-Compressed air passage; 20-Solution nozzle; 21-Atomizing nozzle; 22-Adjusting nut; 23-Screw; 24-Fixing nut. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 3 As shown, a small-flow, large-angle solution nozzle includes a flow regulating valve 1, a compressed air inlet 7, a urea solution inlet 3, a nozzle base 9, and a solution nozzle 20. The solution nozzle 20 includes an aerosol mixing chamber 12 and an atomizing nozzle 13. The lower part of the nozzle base 9 has the compressed air inlet 7 and the urea solution inlet 3 respectively located on opposite sides. The flow regulating valve 1 is located at the bottom of the nozzle base 9. The top of the nozzle base 9 has an atomizing nozzle 21 with a urea solution outlet 16 and a compressed air outlet 15. The urea solution outlet 16 is located at the center of the atomizing nozzle 21, and multiple compressed air outlets 15 are spaced around the urea solution outlet 16. The atomizing nozzle 21 is connected to the aerosol mixing chamber 12, and the front end of the atomizing nozzle 13 is connected to the atomizing nozzle 13. Multiple atomizing nozzle holes 18 are provided on the atomizing nozzle 13.

[0026] A urea solution tube 6 is inserted inside the nozzle base 9. The outer wall of the urea solution tube 6 and the inner wall of the nozzle base 9 form an annular compressed air channel 19. The compressed air channel 19 is connected to the atomizing nozzle 21 and is correspondingly arranged with multiple compressed air outlets 15. One end of the urea solution tube 6 is connected to the urea solution outlet 16, and the other end is connected to the urea solution inlet 3 through the outlet pipe 5. The urea solution inlet 3 is provided with a sealing ring 4.

[0027] The working principle of a small-flow, large-angle solution nozzle is as follows: Compressed air enters the nozzle base 9 through the compressed air inlet 7, is delivered to the atomizing nozzle 21 through the compressed air channel 19, and is then sent into the aerosol mixing chamber 12 through multiple compressed air outlets 15 on the atomizing nozzle 21. The multiple compressed air outlets 15 serve to disperse pressure, shorten the atomization spray length, and effectively reduce the amount of urea atomized droplets sprayed onto the pipe wall, thus reducing the corrosion of the pipe by the solution. Urea solution is delivered into the aerosol mixing chamber 12 through the urea solution inlet 3, outlet pipe 5, and urea solution pipe 6, and then through the urea solution outlet 16. The urea solution is mixed with the compressed air for effective atomization. The flow rate in the urea solution pipe 6 can be adjusted by the flow regulating valve to support the delivery of small-flow urea solution. In addition, multiple atomizing nozzle holes 18 are opened on the atomizing nozzle 13 to disperse the spray, which is conducive to the effective atomization of the urea solution and effectively reduces the reaction time.

[0028] The annular compressed air channel 19 is formed between the outer wall of the urea solution pipe 6 and the inner wall of the nozzle base 9, and is sealed by the sealing ring 4 to prevent compressed air leakage. The structure is compact and facilitates the installation of the pyrolysis furnace in a small space.

[0029] like Figure 1 As shown, the urea solution pipe 6 is arranged along the center of the compressed air channel 19. The urea solution pipe 6 and the outlet pipe 5 are connected as an integral structure, which is L-shaped. The structure is compact, easy to manufacture, and reduces production costs.

[0030] like Figure 2 As shown, the flow regulating valve 1 is a needle-type flow regulating valve, which includes an adjusting nut 22, a screw 23, a fixing nut 24, and a valve plug 8. The valve plug 8 is fitted at the connection between the urea solution pipe 6 and the outlet pipe 5 and is used to regulate the flow rate in the urea solution pipe 6. Preferably, the flow regulating valve 1 is a needle-type flow regulating valve, also known as a needle valve, which is a fine-tuning valve with a needle-shaped valve plug. In this embodiment, a needle valve is used to regulate the flow rate of the urea solution in the urea solution pipe 6.

[0031] like Figure 2 As shown, the nozzle base 9 and the solution nozzle 20 are detachably connected by internal and external threads. The outer wall of the atomizing nozzle 21 is provided with the external thread and the first nut 10, and the lower end of the aerosol mixing chamber 12 is provided with the internal thread and the second nut 11. The solution nozzle 20 is relatively independent of the nozzle base 9 and can be fitted onto the nozzle base 9, making it easy to disassemble and replace the solution nozzle 20.

[0032] like Figure 4The atomizing nozzle 13 shown includes a spherical surface 17, on which a plurality of atomizing nozzles 18 are formed and spaced apart around the top of the spherical surface 17. The atomizing nozzles 18 are dispersed outwards along the spherical surface 17 to expand the spray coverage area and achieve wide-angle spraying; furthermore, the dispersed arrangement of the atomizing nozzles 18 shortens the length of the solution atomized spray; this makes it effective for applications in small-volume pyrolysis furnaces within confined spaces. The atomizing nozzle 13 with its small distance and large diffusion surface effectively reduces the amount of urea atomized droplets sprayed onto the pipe wall, reducing corrosion of the pipe by the solution.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low flow, high angle solution nozzle characterized by: The system includes a flow regulating valve (1), a compressed air inlet (7), a urea solution inlet (3), a nozzle base (9), and a solution nozzle (20). The solution nozzle (20) includes an aerosol mixing chamber (12) and an atomizing nozzle (13). The nozzle base (9) is provided with a compressed air inlet (7) and a urea solution inlet (3) on opposite sides of its lower part. The nozzle base (9) is provided with a flow regulating valve (1). The nozzle base (9) is provided with an atomizing nozzle (21) on its top. The atomizing nozzle (21) has a urea solution outlet (16) and a compressed air outlet (15). The urea solution outlet (16) is located at the center of the atomizing nozzle (21). Multiple compressed air outlets (15) are spaced around the urea solution outlet (16). The atomizing nozzle (21) is connected to the aerosol mixing chamber (12). The front end of the aerosol mixing chamber (12) is connected to the atomizing nozzle (13). Multiple atomizing nozzle holes (18) are provided on the atomizing nozzle (13). A urea solution tube (6) is inserted inside the nozzle base (9). The outer wall of the urea solution tube (6) and the inner wall of the nozzle base (9) form an annular compressed air channel (19). The compressed air channel (19) is connected to the atomizing nozzle (21) and is correspondingly provided with multiple compressed air outlets (15). One end of the urea solution tube (6) is connected to the urea solution outlet (16), and the other end is connected to the urea solution inlet (3) through the outlet tube (5). The urea solution inlet (3) is provided with a sealing ring (4).

2. The low-flow, high-angle solution nozzle of claim 1, wherein: The urea solution tube (6) is positioned at the center of the compressed air channel (19).

3. The low-flow, high-angle solution nozzle of claim 1, wherein: The urea solution tube (6) and the outlet tube (5) are connected as an integral structure, and the integral structure is L-shaped.

4. The low-flow, high-angle solution nozzle of claim 3, wherein: The flow regulating valve (1) is a needle flow regulating valve. The needle flow regulating valve includes an adjusting nut (22), a screw (23), a fixing nut (24), and a valve plug (8). The valve plug (8) is fitted at the connection between the urea solution pipe (6) and the outlet pipe (5) and is used to regulate the flow rate in the urea solution pipe (6).

5. The low-flow, high-angle solution nozzle of claim 1, wherein: The nozzle base (9) and the solution nozzle (20) are connected in a detachable manner by internal and external threads.

6. The small-flow-rate, large-angle solution nozzle according to claim 5, characterized in that: The outer wall of the atomizing nozzle (21) is provided with the external thread and the first nut (10), and the lower end of the aerosol mixing chamber (12) is provided with the internal thread and the second nut (11).

7. The low-flow, high-angle solution nozzle of claim 1, wherein: The atomizing nozzle (13) includes a spherical surface (17), and a plurality of atomizing nozzles (18) are formed on the spherical surface (17) and are spaced apart around the top of the spherical surface (17).

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