SNCR (selective non-catalytic reduction) denitration spray gun with cooling effect

Abstract

The utility model provides an SNCR (selective non-catalytic reduction) denitration spray gun with a cooling effect, which comprises a gun barrel and a gun body communicated with the gun barrel, one end of the gun barrel extends into a denitration chamber, an air cooling heat dissipation shell is arranged on the surface of the gun barrel in the denitration chamber, and the air cooling heat dissipation shell is communicated with the gun body. An air inlet hole and an air outlet hole which are communicated with the interior of the air-cooling heat dissipation shell are formed in the middle of the top and the middle of the bottom of the air-cooling heat dissipation shell respectively, the ends, away from the air-cooling heat dissipation shell, of the air inlet hole and the air outlet hole are communicated with air pipes respectively, and the two axial ends of the air-cooling heat dissipation shell are connected with the surface of the gun barrel in a sealed mode. One side of the gun body is communicated with a liquid inlet pipe and an air inlet pipe, and one end of the liquid inlet pipe and one end of the air inlet pipe are respectively communicated with liquid ammonia and compressed air. Through the arrangement of the air cooling heat dissipation shell, the air inlet hole, the air outlet hole and the air pipe, flowing air does not enter the denitration cavity, so that the denitration reaction effect is not influenced by the flowing air; the denitration reaction stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of SNCR denitration, in particular to an SNCR denitration spray gun with cooling effect. Background Art

[0002] The SNCR denitrification spray gun is an important component in the SNCR denitrification equipment. The denitrification spray gun is used to transport amino groups and react with the flue gas in the equipment to reduce and remove NOx in the flue gas to generate nitrogen and water. The main structure of the existing SNCR denitrification spray gun is a gun body and a gun barrel. One side of the gun body is connected to liquid ammonia and compressed air, and the end of the gun barrel extends into the denitrification equipment. However, the structural design is simple, and the gun barrel is used for a long time in the high-temperature denitrification chamber. The gun barrel temperature is too high, which is not conducive to the normal denitrification reaction. However, the structure of the existing SNCR spray gun air cooling gun barrel allows flowing air to enter the denitrification chamber, making the reaction unstable. Utility Model Content

[0003] The problem to be solved by the utility model is that the cooling structure allows air to enter the denitration chamber, thus affecting the reaction.

[0004] In order to solve the above technical problems, the utility model provides an SNCR denitrification spray gun with a cooling effect, comprising a gun barrel and a gun body connected to the gun barrel, one end of the gun barrel extends into a denitrification chamber, and an air-cooled heat dissipation shell is provided on the surface of the gun barrel in the denitrification chamber, and an air inlet and an air outlet connected to the interior are respectively provided in the middle of the top and the bottom of the air-cooled heat dissipation shell, and the air inlet and the air outlet are respectively connected to air ducts at one end away from the air-cooled heat dissipation shell, and the air-cooled heat dissipation shell is sealed and connected to the surface of the gun barrel at both ends of its axial direction.

[0005] Preferably, one side of the gun body is connected with a liquid inlet pipe and an air inlet pipe, and one end of the liquid inlet pipe and the air inlet pipe are connected with liquid ammonia and compressed air respectively.

[0006] Preferably, the surface of the gun barrel extending into the denitrification chamber is provided with cooling fins, and the cooling fins are covered inside the air-cooled heat dissipation shell.

[0007] Preferably, the injection end of the gun barrel is provided with an atomizing nozzle.

[0008] Preferably, the top and bottom of the air-cooled heat dissipation shell are respectively provided with protective tubes covering the outside of the air duct.

[0009] Preferably, the air duct is a high temperature resistant air duct.

[0010] Preferably, the air-cooled heat dissipation shell is made of high temperature resistant and corrosion resistant material.

[0011] Preferably, a deflector connected to the air inlet is installed above the inner wall of the air-cooled heat dissipation shell, and radial sides of the deflector guide the air flowing out of the air inlet to flow toward the surface of the gun barrel.

[0012] Preferably, the air-cooled heat sink shell is provided with fixing flanges at both ends in the axial direction, and the fixing flanges are provided with mounting screws for mounting and fixing the air-cooled heat sink shell.

[0013] Preferably, one end of the air duct inside the air inlet hole away from the air-cooled heat dissipation shell is connected to an air supply device, and one end of the air duct inside the air outlet hole away from the air-cooled heat dissipation shell is connected to an air exhaust device.

[0014] Compared with the prior art, the utility model provides a SNCR denitrification spray gun with cooling effect, which has the following beneficial effects:

[0015] 1. The utility model is provided with an air-cooled heat sink shell, an air inlet hole, an air outlet hole and an air duct. The air-cooled heat sink shell is a cylindrical shell with a cavity inside. The gun barrel is inserted into the cavity. Both ends of the air-cooled heat sink shell are sealed and connected to the gun barrel. Flowing air enters the air-cooled heat sink shell from the air inlet hole and is discharged from the air outlet hole, thereby taking away the heat on the surface of the gun barrel to achieve the effect of cooling the gun barrel. At the same time, the flowing air does not enter the denitration chamber, so that the denitration reaction effect is not affected by the flowing air, thereby ensuring the stability of the denitration reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the gun barrel and gun body structure of the utility model;

[0018] Figure 3 It is a cross-sectional view of the air-cooled heat dissipation shell structure of the utility model.

[0019] In the figure: 1. gun barrel; 2. gun body; 3. air-cooled heat sink; 4. air inlet; 5. air outlet; 6. air duct; 7. liquid inlet pipe; 8. air inlet pipe; 9. cooling fins; 10. atomizing nozzle; 11. protective tube; 12. air guide cover; 13. fixing flange. DETAILED DESCRIPTION

[0020] The utility model relates to a SNCR denitrification spray gun with cooling effect, such as Figure 1-3As shown, it includes a gun barrel 1 and a gun body 2 connected to the gun barrel 1, one end of the gun barrel 1 extends into the denitration chamber, an air-cooled heat dissipation shell 3 is arranged on the surface of the gun barrel 1 in the denitration chamber, an air-cooled heat dissipation shell 3 is respectively provided at the top and the middle of the bottom of the air-cooled heat dissipation shell 3 to connect to the inside thereof, an air inlet 4 and an air outlet 5 are respectively arranged at one end of the air inlet 4 and the air outlet 5 away from the air-cooled heat dissipation shell 3 to connect to an air duct 6, the air-cooled heat dissipation shell 3 is sealed and connected to the surface of the gun barrel 1 at both ends of its axial direction, the gun barrel 1 and the gun body 2 are arranged, the gun barrel 1 and the gun body 2 are connected, the injection end of the gun body 2 extends into the denitration equipment, one side of the gun body 2 is connected to liquid ammonia and compressed air, and the compressed air is The compressed air pushes the liquid ammonia into the gun barrel 1, and the liquid ammonia is ejected and discharged from the end of the gun barrel 1 and enters the denitration chamber. By arranging the air-cooled heat dissipation shell 3, the air inlet 4, the air outlet 5 and the air duct 6, the air-cooled heat dissipation shell 3 is a cylindrical shell with a cavity inside. The gun barrel 1 is penetrated in the cavity. Both ends of the air-cooled heat dissipation shell 3 are sealed and connected to the gun barrel 1. The flowing air enters the air-cooled heat dissipation shell 3 from the air inlet 4 and is discharged from the air outlet 5, thereby taking away the heat on the surface of the gun barrel 1, achieving the effect of cooling the gun barrel 1. At the same time, the flowing air does not enter the denitration chamber, so that the denitration reaction effect is not affected by the flowing air, thereby ensuring the stability of the denitration reaction.

[0021] In an embodiment of the utility model, one side of the gun body 2 is connected with a liquid inlet pipe 7 and an air inlet pipe 8, and one end of the liquid inlet pipe 7 and the air inlet pipe 8 are respectively connected with liquid ammonia and compressed air. By setting the above structure, liquid ammonia and compressed air respectively enter the gun body 2, and the liquid ammonia is pushed into the gun barrel 1 by the compressed air, thereby increasing the flow rate of liquid ammonia and increasing the liquid ammonia spraying distance.

[0022] In an embodiment of the utility model, a heat dissipation fin 9 is provided on the surface of the gun barrel 1 extending into the denitrification chamber, and the heat dissipation fin 9 is covered inside the air-cooled heat dissipation shell 3. By providing the heat dissipation fin 9, the surface area of ​​the gun barrel 1 is increased, so that the heat of the gun barrel 1 is dissipated faster, and the heat is taken away by the flowing air, thereby achieving a better cooling effect of the gun barrel 1.

[0023] In the embodiment of the utility model, the spray end of the gun barrel 1 is provided with an atomizing nozzle 10. By providing the atomizing nozzle 10, liquid ammonia is sprayed through the atomizing nozzle 10, so that the liquid ammonia is atomized, thereby increasing the reaction area of ​​the liquid ammonia.

[0024] In an embodiment of the utility model, the top and bottom of the air-cooled heat dissipation shell 3 are respectively provided with a protective tube 11 covering the outside of the air duct 6. By providing the protective tube 11, the air duct 6 is covered in the protective tube 11, which prevents corrosive substances from contacting the air duct 6, thereby protecting the air duct 6. The protective tube 11 here can be made of stainless steel.

[0025] In an embodiment of the utility model, the air duct 6 is a high temperature resistant air duct 6. By setting the high temperature resistant air duct 6, the high temperature resistance of the air duct 6 is improved, so that the air duct 6 can be used in a high temperature working environment. The high temperature resistant air duct 6 here is made of silicone coated glass fiber cloth.

[0026] In the embodiment of the utility model, the air-cooled heat dissipation shell 3 is made of high-temperature resistant and corrosion-resistant materials. By setting the above-mentioned structure, the high-temperature resistant and corrosion-resistant properties of the air-cooled heat dissipation shell 3 are improved, so that the air-cooled heat dissipation shell 3 can be used in a high-temperature and highly corrosive working environment. Here, the air-cooled heat dissipation shell 3 can be made of stainless steel.

[0027] In the embodiment of the utility model, a deflector 12 connected to the air inlet hole 4 is installed above the inner wall of the air-cooled heat dissipation shell 3, and the radial sides of the deflector guide the air flowing out of the air inlet hole 4 to flow toward the surface of the barrel 1. By setting the deflector, the air flowing out of the air inlet hole 4 flows downward in a direction parallel to the axial direction of the barrel 1, so that the air on the surface of the barrel 1 is more uniform and the cooling effect is better.

[0028] In the embodiment of the utility model, the air-cooled heat sink shell 3 is provided with fixing flanges 13 at both ends of the axial direction, and the fixing flanges 13 are provided with mounting screws for mounting and fixing the air-cooled heat sink shell 3. By setting the fixing flanges 13 and the mounting screws, and using the mounting screws for matching installation, the air-cooled heat sink shell 3 is installed and fixed.

[0029] In an embodiment of the utility model, the end of the air duct 6 inside the air inlet hole 4 away from the air-cooled heat dissipation shell 3 is connected to an air supply device, and the end of the air duct 6 inside the air outlet hole 5 away from the air-cooled heat dissipation shell 3 is connected to an exhaust device. By setting the above structure, the air supply device transports air into the air inlet hole 4 through the air duct 6, and the exhaust device exhausts air from the air-cooled heat dissipation shell 3 through the air duct 6, so that the air flow speed is faster and the air cooling efficiency is improved.

[0030] When in use, first, the air-cooled heat sink 3 and the gun barrel 1 are installed and fixed, and the air-cooled heat sink 3 is covered on the surface of the gun barrel 1, and the heat sink fins 9 are located inside the air-cooled heat sink 3. The fixing flange 13 and the denitrification equipment are installed and fixed by installing the screw and the denitrification equipment. Then, the liquid ammonia and the compressed air are respectively input into the liquid inlet pipe 7 and the air inlet pipe 8. The compressed air pushes the liquid ammonia into the gun barrel 1, and the liquid ammonia is discharged from the injection end of the gun barrel 1. The atomized liquid ammonia is formed through the atomizing nozzle 10, and then the air is transported into the air duct 6 through the air supply equipment. The flowing air enters the air inlet 4 from the air duct 6 and then enters the air-cooled heat sink 3. After passing through the guide cover 12, the air flows downward in a direction parallel to the axial direction of the gun barrel 1, taking away the heat from the surface of the gun barrel 1. At the same time, the flowing air enters the air outlet 5, and the exhaust equipment discharges the air from the air-cooled heat sink 3 through the air duct 6.

[0031] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A SNCR denitrification spray gun with a cooling effect, comprising a gun barrel (1) and a gun body (2) connected to the gun barrel (1), characterized in that: One end of the gun barrel (1) extends into the denitration chamber, and a wind-cooled heat dissipation shell (3) is arranged on the surface of the gun barrel (1) in the denitration chamber. An air inlet (4) and an air outlet (5) connected to the interior of the air-cooled heat dissipation shell (3) are respectively provided in the middle of the top and bottom of the air-cooled heat dissipation shell (3). The air inlet (4) and the air outlet (5) are respectively connected to air ducts (6) at one end away from the air-cooled heat dissipation shell (3). The air-cooled heat dissipation shell (3) is sealed and connected to the surface of the gun barrel (1) at both ends of its axial direction.

2. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: One side of the gun body (2) is connected to a liquid inlet pipe (7) and an air inlet pipe (8), and one end of the liquid inlet pipe (7) and the air inlet pipe (8) are respectively connected to liquid ammonia and compressed air.

3. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The surface of the gun barrel (1) extending into the denitration chamber is provided with heat dissipation fins (9), and the heat dissipation fins (9) are covered inside the air-cooled heat dissipation shell (3).

4. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The spray end of the gun barrel (1) is provided with an atomizing nozzle (10).

5. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The top and bottom of the air-cooled heat dissipation shell (3) are respectively provided with protective tubes (11) which are arranged outside the air duct (6).

6. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The air duct (6) is a high temperature resistant air duct.

7. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The air-cooled heat dissipation shell (3) is made of high temperature resistant and corrosion resistant material.

8. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: A deflector (12) connected to the air inlet hole (4) is installed above the inner wall of the air-cooled heat dissipation shell (3), and the deflector (12) guides the air flowing out of the air inlet hole (4) to flow toward the surface of the gun barrel (1) on both sides of the radial direction of the gun barrel (1).

9. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: The air-cooled heat dissipation shell (3) is provided with fixing flanges (13) at both ends in the axial direction, and the fixing flanges (13) are provided with mounting screws for mounting and fixing the air-cooled heat dissipation shell (3).

10. The SNCR denitrification spray gun with cooling effect according to claim 1, characterized in that: One end of the air duct (6) inside the air inlet hole (4) away from the air-cooled heat dissipation shell (3) is connected to an air supply device, and one end of the air duct (6) inside the air outlet hole (5) away from the air-cooled heat dissipation shell (3) is connected to an air exhaust device.

Images