Low-nitrogen energy-saving spray gun used on kiln

Abstract

A low-nitrogen energy-saving spray gun used on a kiln comprises a first gun body, a second gun body, a gun barrel, a gun cap and a combustion-supporting air spraying piece. The front end of the first gun body is connected to the rear end of the second gun body, the interior of the first gun body communicates with the interior of the second gun body, and the first gun body is provided with a combustion-supporting air connector pipe. The combustion-supporting air spraying piece is installed in the second gun body and provided with a channel, and the channel is of an inward spiral channel structure. The utility model provides the low-nitrogen energy-saving spray gun used on the kiln according to the content, which overcomes the defects of insufficient combustion, high energy consumption and high nitrogen oxide content of a common kiln spray gun in the prior art, and overcomes the defects that combustion-supporting air of a premixing type energy-saving spray gun is easy to be excessive, and the energy consumption is low in the combustion process. The coking phenomenon is caused by high possibility of tempering; and the generation of nitrogen oxides is relatively high.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln spray guns, in particular to a low-nitrogen energy-saving spray gun used on a kiln. Background Art

[0002] The kiln spray guns used in the production of building ceramics mainly include ordinary spray guns and premixed energy-saving spray guns. The above two types of spray guns have certain defects, such as incomplete combustion, high energy consumption, and high nitrogen oxides. The premixed energy-saving spray gun has been designed and optimized. Although the combustion efficiency is improved compared to ordinary spray guns, it is easy to have excessive combustion air, and it is easy to flash back during the combustion process, causing coking and high nitrogen oxide generation. Utility Model Content

[0003] The utility model aims to provide a low-nitrogen energy-saving spray gun for use on a kiln, which solves the defects of ordinary kiln spray guns in the prior art, such as incomplete combustion, high energy consumption, and high nitrogen oxides, as well as the problem that the combustion-supporting air of the premixed energy-saving spray gun is prone to excessive, and it is easy to flash back during the combustion process, resulting in coking and high nitrogen oxide generation.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A low-nitrogen energy-saving spray gun used in a kiln furnace comprises a first gun body, a second gun body, a gun barrel, a gun cap and a combustion-supporting air spray piece;

[0006] The front end of the first gun body is connected to the rear end of the second gun body, the interior of the first gun body is connected to the interior of the second gun body, and the first gun body is provided with a combustion-supporting air interface pipe;

[0007] The combustion-supporting air spray piece is installed inside the second gun body, and the combustion-supporting air spray piece is provided with a channel, and the channel is an inward spiral channel structure, one end of the channel is connected to the rear end of the second gun body, and the other end of the channel is connected to the front end of the second gun body;

[0008] One end of the gun barrel is installed on the first gun body, and one end of the gun barrel is provided with a gas interface, the other end of the gun barrel is installed on one side of the combustion-supporting air spray piece, and the gun cap is installed on the other side of the combustion-supporting air spray piece, the gun cap is connected to the gun barrel through the combustion-supporting air spray piece, and the gun cap is provided with a wind cap hole, and the gun cap is connected to the interior of the front end of the second gun body through the wind cap hole.

[0009] Furthermore, the combustion-supporting air spray piece is provided with a through hole, one end of the through hole is connected to the gun barrel, and the other end of the through hole is connected to the gun cap.

[0010] Specifically, the channel is provided with an air inlet and an air outlet;

[0011] The air inlet and the air outlet are staggered, and the distance between the air inlet and the through hole is greater than the distance between the air outlet and the through hole;

[0012] The plurality of air inlets are arranged on the rear end surface of the combustion-supporting air spray piece, and the plurality of air inlets are evenly arranged along the circumferential direction of the combustion-supporting air spray piece.

[0013] The plurality of air outlets are arranged on the front end surface of the combustion-supporting air spray piece, and the plurality of air outlets are evenly arranged along the circumferential direction of the combustion-supporting air spray piece.

[0014] Preferably, the hood hole is arranged obliquely, with one end of the hood hole facing the rear end inside the gun cap, and the other end of the hood hole facing the front end outside the gun cap.

[0015] In some embodiments, the rear end of the second gun body can be detachably mounted on the front end of the first gun body.

[0016] Furthermore, the second gun body is made of silicon carbide.

[0017] Specifically, the combustion-supporting air interface pipe is tilted, with one end of the combustion-supporting air interface pipe facing the front end inside the first gun body, and the other end of the combustion-supporting air interface pipe facing the rear end outside the first gun body.

[0018] Preferably, the angle between the combustion-supporting air interface pipe and the first gun body is in the range of 50°-70°.

[0019] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0020] Through the inward spiral channel structure of the channel, the trajectory of the combustion-supporting air is changed to a mode of converging inward while advancing in a spiral, so that the mixture of the combustion-supporting air and the fuel gas becomes not only more uniform, but also the speed of outward injection is accelerated, so that the high-temperature airflow can quickly leave the nozzle of the spray gun and quickly enter the kiln. The combustion-supporting air does not need very high pressure to push, and the air volume of the combustion-supporting air can be reduced, achieving the effect of energy saving and low nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a low-nitrogen energy-saving spray gun according to one embodiment of the present utility model;

[0022] Figure 2 yes Figure 1 A magnified view of point A;

[0023] Figure 3 This is a schematic diagram of the structure of the air inlet and the air outlet of one embodiment of the utility model;

[0024] Among them: the first gun body 1, the combustion-supporting air interface pipe 11, the second gun body 2, the gun barrel 3, the gas interface 31, the gun cap 4, the wind cap hole 41, the combustion-supporting air spray piece 5, the channel 51, the air inlet 511, the air outlet 512, and the through hole 52. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", "inner side", "outer side", "inner end", "outer end", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, which are used to distinguish and describe the features, without distinction of order or importance. In the description of the present utility model, unless otherwise specified, "multiple" means more than two.

[0027] In one embodiment of the present invention, Figure 1-3As shown, a low-nitrogen energy-saving spray gun used on a kiln comprises a first gun body 1, a second gun body 2, a gun barrel 3, a gun cap 4 and a combustion-supporting air spray piece 5; the front end of the first gun body 1 is connected to the rear end of the second gun body 2, the interior of the first gun body 1 is communicated with the interior of the second gun body 2, and the first gun body 1 is provided with a combustion-supporting air interface pipe 11; the combustion-supporting air spray piece 5 is installed in the interior of the second gun body 2, and the combustion-supporting air spray piece 5 is provided with a channel 51, and the channel 51 is an inward spiral channel structure, and one end of the channel 51 is communicated with the second At the rear end inside the gun body 2, the other end of the channel 51 is connected to the front end inside the second gun body 2; one end of the gun barrel 3 is installed on the first gun body 1, and one end of the gun barrel 3 is provided with a gas interface 31, the other end of the gun barrel 3 is installed on one side of the combustion-supporting air spray piece 5, and the gun cap 4 is installed on the other side of the combustion-supporting air spray piece 5, the gun cap 4 is connected to the gun barrel 3 through the combustion-supporting air spray piece 5, and the gun cap 4 is provided with a wind cap hole 41, and the gun cap 4 is connected to the interior of the front end of the second gun body 2 through the wind cap hole 41. In the present embodiment, the first gun body 1 is provided with a combustion-supporting air interface pipe 11, and the combustion-supporting air interface pipe 11 is connected to the interior of the rear end of the second gun body 2 through the interior of the first gun body 1, one end of the gun barrel 3 is installed on the first gun body 1, and one end of the gun barrel 3 protrudes from the first gun body 1, and the gas interface 31 is located on the outside of the first gun body 1, and the channel 51 is an inward spiral channel structure. Specifically, the distance from the air inlet of the channel 51 to the center of the combustion-supporting air spray piece 5 is greater than the distance from the air outlet of the channel 51 to the center of the combustion-supporting air spray piece 5. When working, the gas enters the interior of the gun barrel 3 from the gas interface 31, and then enters the interior of the gun cap 4 through the combustion-supporting air spray piece 5, and then enters from the wind cap hole 41 of the gun cap 4 At the same time as the fuel gas is being transported, combustion-supporting air enters the interior of the rear end of the second gun body 2 from the combustion-supporting air interface pipe 11 through the interior of the first gun body 1, and then enters the interior of the front end of the second gun body 2 through the channel 51 of the inward spiral structure of the combustion-supporting air spray blade 5, and is mixed with the fuel gas and burned. The present application uses the inward spiral channel structure of the channel 51 to change the running trajectory of the combustion-supporting air into a mode of converging inward while advancing in a spiral, thereby making the mixing of the combustion-supporting air and the fuel gas not only more uniform, but also faster in outward spraying, so that the high-temperature airflow can quickly leave the spray gun port and quickly enter the kiln. The combustion-supporting air does not need to be pushed at a very high pressure, and the air volume of the combustion-supporting air can be reduced, thereby achieving the effect of energy saving and low nitrogen.

[0028] like Figure 1-3As shown, the combustion-supporting air spray piece 5 is provided with a through hole 52, one end of the through hole 52 is connected to the gun barrel 3, and the other end of the through hole 52 is connected to the gun cap 4. In this embodiment, the through hole 52 is passed through the middle of the combustion-supporting air spray piece 5, the end of the gun barrel 3 is mounted on the rear end face of the combustion-supporting air spray piece 5, and the gun cap 4 is mounted on the front end face of the combustion-supporting air spray piece 5. The interior of the gun cap 4 is connected to the interior of the gun barrel 3 through the through hole 52, thereby ensuring that the fuel gas can enter the interior of the gun cap 4 and be sprayed out from the air cap hole 41.

[0029] like Figure 2-3 As shown, the channel 51 is provided with an air inlet 511 and an air outlet 512; the air inlet 511 and the air outlet 512 are staggered, and the distance between the air inlet 511 and the through hole 52 is greater than the distance between the air outlet 512 and the through hole 52; a plurality of the air inlets 511 are provided at the rear end face of the combustion-supporting air spray blade 5, and a plurality of the air inlets 511 are evenly arranged along the circumferential direction of the combustion-supporting air spray blade 5, a plurality of the air outlets 512 are provided at the front end face of the combustion-supporting air spray blade 5, and a plurality of the air outlets 511 are evenly arranged along the circumferential direction of the combustion-supporting air spray blade 5. In this embodiment, the combustion-supporting air spray blade 5 is provided with eight channels 51, the eight air inlets 511 are provided at the rear end face of the combustion-supporting air spray blade 5, and the eight air outlets 512 are provided at the front end face of the combustion-supporting air spray blade 5. The eight air inlets 511 are staggered with the corresponding eight air outlets 512, respectively. Specifically, the distance between the air inlet 511 and the through hole 52 is greater than the distance between the air outlet 512 and the through hole 52, thereby forming an inward-rotating air outlet structure, and the air outlet 512 can be closer to the wind cap hole 41 of the gun cap 4, so that the fuel gas and combustion-supporting air are easy to mix and burn.

[0030] like Figure 2 As shown, the hood hole 41 is tilted, one end of the hood hole 41 faces the rear end inside the gun cap 4, and the other end of the hood hole 41 faces the front end outside the gun cap 4. In this embodiment, the hood hole 41 is tilted, and the air inlet end of the hood hole 41 faces the rear end inside the gun cap 4, while the air outlet end of the hood hole 41 faces the front end outside the gun cap 4, which not only conforms to the flow direction of the gas, but also facilitates the gas ejected from the hood hole 41 to meet and mix with the combustion-supporting air of the air outlet 512, thereby ensuring uniform mixing and improving mixing efficiency.

[0031] like Figure 1As shown, the rear end of the second gun body 2 can be detachably mounted on the front end of the first gun body 1. In this embodiment, the front end of the second gun body 2 serves as the spray gun port, and the front end of the second gun body 2 is usually designed with traditional high-temperature stainless steel. After long-term use, the spray wall port is prone to problems such as burn deformation and slag falling. The second gun body 2 is set to be detachably mounted on the first gun body 1, which makes it easy to disassemble and replace the second gun body 2 without scrapping the entire spray gun, thereby reducing the cost of use. Specifically, the second gun body 2 can be detachably mounted on the first gun body 1 through a screw and nut connection structure. It should be noted that the disassembly structure of the second gun body 2 and the first gun body 1 includes but is not limited to a screw and nut disassembly structure.

[0032] In the present embodiment, the material of the second gun body 2 is set to be silicon carbide material, which has high hardness, can resist wear and scratches well, has high temperature resistance, can work stably for a long time in a high temperature environment, has high thermal conductivity, can achieve rapid heat dissipation, has high corrosion resistance, can work stably in various chemical media such as acid, alkali, and salt, as well as has high strength and high rigidity, can resist deformation and deformation well. Combining the above advantages, the second gun body 2 is not prone to problems such as burning deformation and slagging, thereby extending the service life of the spray gun.

[0033] like Figure 1 As shown, the combustion-supporting air interface pipe 11 is tilted, one end of the combustion-supporting air interface pipe 11 faces the front end inside the first gun body 1, and the other end of the combustion-supporting air interface pipe 11 faces the rear end outside the first gun body 1. In this embodiment, the combustion-supporting air interface pipe 11 is tilted, and the air inlet end of the combustion-supporting air interface pipe 11 faces the rear end outside the first gun body 1, and the air outlet end of the combustion-supporting air interface pipe 11 faces the front end inside the first gun body 1, so that the combustion-supporting air enters the first gun body 1 and moves along the front end of the first gun body 1 to ensure the air supply efficiency. Furthermore, compared with the traditional structure perpendicular to the gun body, the tilted combustion-supporting air interface pipe 11 can reduce the resistance of the combustion-supporting air when it enters the spray gun, with less kinetic energy loss, which is conducive to mixing with the fuel gas under low wind pressure.

[0034] like Figure 1-3 As shown, the angle between the combustion-supporting air interface pipe 11 and the first gun body 1 is in the range of 50°-70°. In this embodiment, the angle between the combustion-supporting air interface pipe 11 and the first gun body 1 is set to 50°-70°, which can ensure that the combustion-supporting air can still be fully mixed with the fuel gas under low wind pressure. Preferably, the mixing effect is best when the angle between the combustion-supporting air interface pipe 11 and the first gun body 1 is 60°.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-nitrogen energy-saving spray gun used on a kiln, characterized in that: It includes a first gun body, a second gun body, a gun barrel, a gun cap and a combustion-supporting air spray piece; The front end of the first gun body is connected to the rear end of the second gun body, the interior of the first gun body is connected to the interior of the second gun body, and the first gun body is provided with a combustion-supporting air interface pipe; The combustion-supporting air spray piece is installed inside the second gun body, and the combustion-supporting air spray piece is provided with a channel, and the channel is an inward spiral channel structure, one end of the channel is connected to the rear end of the second gun body, and the other end of the channel is connected to the front end of the second gun body; One end of the gun barrel is installed on the first gun body, and one end of the gun barrel is provided with a gas interface, the other end of the gun barrel is installed on one side of the combustion-supporting air spray piece, and the gun cap is installed on the other side of the combustion-supporting air spray piece, the gun cap is connected to the gun barrel through the combustion-supporting air spray piece, and the gun cap is provided with a wind cap hole, and the gun cap is connected to the interior of the front end of the second gun body through the wind cap hole.

2. A low-nitrogen energy-saving spray gun for use on a kiln according to claim 1, characterized in that: The combustion-supporting air spray piece is provided with a through hole, one end of the through hole is connected to the gun barrel, and the other end of the through hole is connected to the gun cap.

3. A low-nitrogen energy-saving spray gun for use on a kiln according to claim 2, characterized in that: The channel is provided with an air inlet and an air outlet; The air inlet and the air outlet are staggered, and the distance between the air inlet and the through hole is greater than the distance between the air outlet and the through hole; The plurality of air inlets are arranged on the rear end surface of the combustion-supporting air spray piece, and the plurality of air inlets are evenly arranged along the circumferential direction of the combustion-supporting air spray piece. The plurality of air outlets are arranged on the front end surface of the combustion-supporting air spray piece, and the plurality of air outlets are evenly arranged along the circumferential direction of the combustion-supporting air spray piece.

4. The low-nitrogen energy-saving spray gun used on a kiln according to claim 1, characterized in that: The wind cap hole is arranged obliquely, one end of the wind cap hole faces the rear end inside the gun cap, and the other end of the wind cap hole faces the front end outside the gun cap.

5. The low-nitrogen energy-saving spray gun used on a kiln according to claim 1, characterized in that: The rear end of the second gun body is detachably mounted on the front end of the first gun body.

6. A low-nitrogen energy-saving spray gun for use on a kiln according to claim 5, characterized in that: The material of the second gun body is silicon carbide.

7. The low-nitrogen energy-saving spray gun used on a kiln according to claim 1, characterized in that: The combustion-supporting air interface pipe is tilted, with one end of the combustion-supporting air interface pipe facing the front end inside the first gun body, and the other end of the combustion-supporting air interface pipe facing the rear end outside the first gun body.

8. A low-nitrogen energy-saving spray gun for use on a kiln according to claim 7, characterized in that: The included angle between the combustion-supporting air interface pipe and the first gun body is in the range of 50°-70°.

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