Dynamic mixer with nozzle structure

Abstract

The utility model belongs to the technical field of mixer, especially a dynamic mixer with spray pipe structure, including the hollow and both ends open shell and setting in the venturi pipe of shell, the venturi pipe one end is air inlet, the other end is mixed gas outlet, the shell is formed with gas inlet chamber between venturi pipe, is equipped with the gas inlet pipe of intercommunication gas inlet chamber on the shell, be equipped with the spray pipe in the throat pipe of venturi pipe, one end of spray pipe is connected on the lateral wall of throat pipe, and intercommunication gas inlet chamber, the end face on the other end of spray pipe is equipped with the air hole, the lateral wall on spray pipe is equipped with a plurality of small holes along the axial interval setting, the utility model mixes the effectual good, effectively reduces the emission of nitrogen oxides, reduces a series of troubles caused by the mixer mixes the bad.

Description

Technical Field

[0001] This utility model belongs to the field of mixer technology, and specifically refers to a dynamic mixer with a nozzle structure. Background Technology

[0002] Chinese invention patent (publication number CN110906333A, application date 2019.12.13, publication date 2020.03.24) discloses a mixer installed in a gas combustion system to mix air and gas to form a combustible mixture. The mixer includes: a venturi tube having an air inlet, a gas inlet, and a mixed gas outlet; the venturi tube having a central axis and a throat located along the central axis between the air inlet and the mixed gas outlet; the gas inlet being located at the throat; and an adjusting component disposed in the venturi tube and downstream of the throat, the adjusting component being drivable to move along the central axis toward or away from the throat, thereby changing the gas flow area within the venturi tube.

[0003] The shortcomings of the above-mentioned mixer are: simply using high-velocity air to impact the combustion gas for mixing results in poor mixing effect, high nitrogen oxide emissions, and a tendency for backfire and flameout. Utility Model Content

[0004] The purpose of this invention is to provide a dynamic mixer with a nozzle structure, which has a good mixing effect, effectively reduces nitrogen oxide emissions, and reduces a series of malfunctions caused by poor mixing.

[0005] This utility model is implemented as follows:

[0006] A dynamic mixer with a nozzle structure includes a hollow outer shell with openings at both ends and a venturi tube disposed within the outer shell. One end of the venturi tube is an air inlet, and the other end is a mixed gas outlet. A gas intake chamber is formed between the outer shell and the venturi tube. A gas intake pipe communicating with the gas intake chamber is provided on the outer shell. A nozzle is provided inside the throat of the venturi tube. One end of the nozzle is connected to the side wall of the throat and communicates with the gas intake chamber. An outlet hole is provided on the end face of the other end of the nozzle. Multiple small holes are spaced apart along the axial direction on the side wall of the nozzle.

[0007] In the aforementioned dynamic mixer with a nozzle structure, multiple nozzles are evenly distributed around the circumference.

[0008] In the above-mentioned dynamic mixer with a nozzle structure, multiple nozzles are evenly distributed around the circumference to form nozzle groups. Multiple nozzle groups are distributed along the axial direction of the throat, and the nozzles of adjacent nozzle groups are staggered.

[0009] In the aforementioned dynamic mixer with a nozzle structure, the orifice is disposed on the side wall of the nozzle near the outlet of the mixed gas.

[0010] In the aforementioned dynamic mixer with a nozzle structure, multiple through holes are evenly distributed around the sidewall of the throat, which connect the gas intake chamber and the inner cavity of the throat. The through holes are located on the side of the nozzle near the air inlet.

[0011] In the above-mentioned dynamic mixer with a nozzle structure, the nozzle includes a hollow tube body with openings at both ends. One end of the tube body is provided with a connector and the other end is covered with a cover plate. The connector penetrates the side wall of the throat tube and is fixedly installed on the throat tube. The connector is provided with an air passage hole that connects the gas inlet chamber and the inner cavity of the tube body. The air outlet hole is provided on the cover plate.

[0012] In the aforementioned dynamic mixer with a nozzle structure, the connector is threaded to the sidewall of the throat, and the air passage is a hexagonal hole.

[0013] In the aforementioned dynamic mixer with a nozzle structure, the connector and the throat can also be fixed by welding.

[0014] In the aforementioned dynamic mixer with a nozzle structure, the venturi tube further includes an inlet straight pipe, a converging pipe, a diverging pipe, and an outlet straight pipe. The converging pipe connects the inlet straight pipe and the throat, and the diverging pipe connects the throat and the outlet straight pipe. The end of the inlet straight pipe away from the converging pipe is the air inlet, and the end of the outlet straight pipe away from the diverging pipe is the mixed gas outlet. The converging pipe, the throat, the diverging pipe, and the outer casing form the gas intake chamber.

[0015] In the aforementioned dynamic mixer with a nozzle structure, the end of the nozzle with an air outlet is positioned toward the axis of the throat.

[0016] In the aforementioned dynamic mixer with a nozzle structure, the diameter of the air outlet is larger than the diameter of the small hole.

[0017] The outstanding advantages of this utility model compared to the prior art are:

[0018] This invention features a nozzle installed inside the throat of a venturi tube, with an outlet hole on the end face of the nozzle. Multiple small holes are spaced axially along the side wall of the nozzle, ensuring uniform distribution of the combustion gas within the throat. This uniformly distributed gas collides and mixes with air, resulting in excellent mixing and effectively reducing nitrogen oxide emissions. This, in turn, reduces a series of malfunctions caused by poor mixing in the mixer. Furthermore, compared to mixers of the same volume, this invention provides better mixing and reduces the requirements for the internal flow rate of the mixer. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the present invention.

[0020] Figure 2 This is a perspective view of the present invention.

[0021] Figure 3 This is the three-dimensional nozzle of the present invention. Figure 1 .

[0022] Figure 4 This is the three-dimensional nozzle of the present invention. Figure 2 .

[0023] Reference numerals: 1. Outer shell; 2. Venturi tube; 21. Throat; 22. Inlet straight pipe; 23. Converging pipe; 24. Diverging pipe; 25. Outlet straight pipe; 3. Gas inlet chamber; 4. Gas inlet pipe; 5. Nozzle; 51. Pipe body; 52. Connector; 53. Cover plate; 6. Gas outlet; 7. Small hole; 8. Through hole; 9. Gas passage hole. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4:

[0025] A dynamic mixer with a nozzle structure includes a hollow outer shell 1 with openings at both ends and a venturi tube 2 disposed inside the outer shell 1. One end of the venturi tube 2 is an air inlet and the other end is a mixed gas outlet. A gas intake chamber 3 is formed between the outer shell 1 and the venturi tube 2. A gas intake pipe 4 is provided on the outer shell 1 to communicate with the gas intake chamber 3. A nozzle 5 is provided inside the throat 21 of the venturi tube 2. One end of the nozzle 5 is connected to the side wall of the throat 21 and communicates with the gas intake chamber 3. An outlet hole 6 is provided on the end face of the other end of the nozzle 5. A plurality of small holes 7 are provided axially at intervals on the side wall of the nozzle 5.

[0026] Figure 1 Solid arrows indicate the direction of gas flow, while dashed arrows indicate the direction of air flow.

[0027] The working principle of this utility model is as follows: Figure 1-4 As shown, air enters the throat 21 of the venturi tube 2 through the air inlet of the venturi tube 2, and the fuel gas enters the nozzle 5 through the fuel gas inlet pipe 4 and the fuel gas inlet chamber 3, and then enters the throat 21 through the outlet hole 6 and the small hole 7 to mix with the air and then flow out from the mixed gas outlet of the venturi tube 2.

[0028] This invention features a nozzle 5 installed inside the throat 21 of a venturi tube 2, with an outlet 6 on the end face of the nozzle 5. Multiple small holes 7 are spaced axially along the side wall of the nozzle 5, ensuring that the combustion gas is evenly distributed within the throat 21. This evenly distributed combustion gas collides and mixes with air, resulting in a good mixing effect and effectively reducing nitrogen oxide emissions. This, in turn, reduces a series of malfunctions caused by poor mixing in the mixer. Furthermore, compared to mixers of the same volume, this invention provides a better mixing effect and reduces the requirements for the internal flow rate of the mixer.

[0029] For better blending results, such as Figure 1 , 2 As shown, the nozzle 5 has multiple nozzles evenly distributed around its circumference.

[0030] To further improve the mixing effect, such as Figure 1 , 2 As shown, multiple nozzles 5 are evenly distributed around the circumference to form nozzle groups. Multiple nozzle groups are distributed along the axial direction of the throat 21, and the nozzles 5 of adjacent nozzle groups are staggered. In this embodiment, three nozzle groups are distributed along the axial direction of the throat 21. The middle nozzle group has four nozzles 5, and the nozzle groups on both sides each have eight nozzles 5.

[0031] Preferably, the small hole 7 is disposed on the side wall of the nozzle 5 near the outlet of the mixed gas.

[0032] To further improve the mixing effect, such as Figure 1 , 2 As shown, multiple through holes 8 are evenly distributed around the side wall of the throat pipe 21. The through holes 8 connect the gas intake chamber 3 and the inner cavity of the throat pipe 21. The through holes 8 are located on the side of the nozzle 5 near the air inlet.

[0033] Structure of nozzle 5: as follows Figure 1-4 As shown, the nozzle 5 includes a hollow tube 51 with openings at both ends. One end of the tube 51 is provided with a connector 52 and the other end is covered with a cover plate 53. The connector 52 penetrates the side wall of the throat 21 and is fixedly installed on the throat 21. The connector 52 is provided with an air passage 9 that connects the gas inlet chamber 3 and the inner cavity of the tube 51. The air outlet 6 is provided on the cover plate 53.

[0034] Connection structure between connector 52 and throat 21: connector 52 is connected to the side wall of throat 21 by thread. The air passage 9 is a hexagonal hole, which facilitates the rotation of connector 52 through air passage 9, thereby disassembling and assembling nozzle 5.

[0035] The structure of Venturi tube 2: as follows Figure 1 , 2As shown, the Venturi tube 2 also includes an inlet straight pipe 22, a converging pipe 23, a diverging pipe 24, and an outlet straight pipe 25. The converging pipe 23 connects the inlet straight pipe 22 and the throat 21, and the diverging pipe 24 connects the throat 21 and the outlet straight pipe 25. The end of the inlet straight pipe 22 away from the converging pipe 23 is the air inlet, and the end of the outlet straight pipe 25 away from the diverging pipe 24 is the mixed gas outlet. The converging pipe 23, the throat 21, the diverging pipe 24, and the outer casing 1 form the gas intake chamber 3.

[0036] Furthermore, the end of the nozzle 5 with the air outlet 6 is positioned toward the axis of the throat 21.

[0037] Furthermore, the diameter of the vent 6 is larger than the diameter of the small hole 7.

[0038] Compared to the original mixers that typically only have small gaps or holes on the side wall of the throat, this invention changes the gas outlet from a surface arrangement to a three-dimensional arrangement.

[0039] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A dynamic mixer with a nozzle structure, characterized in that: It includes a hollow shell (1) with openings at both ends and a venturi tube (2) disposed inside the shell (1). One end of the venturi tube (2) is an air inlet and the other end is a mixed gas outlet. A gas intake chamber (3) is formed between the shell (1) and the venturi tube (2). A gas intake pipe (4) is provided on the shell (1) to connect with the gas intake chamber (3). A nozzle (5) is provided in the throat (21) of the venturi tube (2). One end of the nozzle (5) is connected to the side wall of the throat (21) and connects with the gas intake chamber (3). An air outlet (6) is provided on the end face of the other end of the nozzle (5). Multiple small holes (7) are provided axially at intervals on the side wall of the nozzle (5).

2. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The nozzle (5) has multiple nozzles evenly distributed around its circumference.

3. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The nozzle (5) has multiple nozzles evenly distributed around its circumference to form a nozzle group. The nozzle group has multiple nozzles distributed along the axial direction of the throat (21), and the nozzles (5) of two adjacent nozzle groups are staggered.

4. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The small hole (7) is located on the side wall of the nozzle (5) near the outlet of the mixed gas.

5. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The throat (21) has multiple through holes (8) evenly distributed around its sidewall. The through holes (8) connect the gas intake chamber (3) and the inner cavity of the throat (21). The through holes (8) are located on the side of the nozzle (5) near the air inlet.

6. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The nozzle (5) includes a hollow tube (51) with openings at both ends. One end of the tube (51) is provided with a connector (52) and the other end is covered with a cover plate (53). The connector (52) penetrates the side wall of the throat (21) and is fixedly installed on the throat (21). The connector (52) is provided with an air passage (9) that connects the gas inlet chamber (3) and the inner cavity of the tube (51). The air outlet (6) is provided on the cover plate (53).

7. A dynamic mixer with a nozzle structure according to claim 6, characterized in that: The connector (52) is connected to the side wall of the throat (21) by a thread, and the air passage (9) is a hexagonal hole.

8. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The Venturi tube (2) also includes an inlet straight pipe (22), a converging pipe (23), a diverging pipe (24), and an outlet straight pipe (25). The converging pipe (23) connects the inlet straight pipe (22) and the throat (21). The diverging pipe (24) connects the throat (21) and the outlet straight pipe (25). The end of the inlet straight pipe (22) away from the converging pipe (23) is the air inlet. The end of the outlet straight pipe (25) away from the diverging pipe (24) is the mixed gas outlet. The converging pipe (23), the throat (21), the diverging pipe (24) and the outer casing (1) form the gas intake chamber (3).

9. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The nozzle (5) is provided with an air outlet (6) at the end facing the axis of the throat (21).

10. A dynamic mixer with a nozzle structure according to claim 1, characterized in that: The diameter of the vent (6) is larger than the diameter of the small hole (7).

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