Ammonia-air mixer

Abstract

The utility model discloses an ammonia-air mixer which comprises a mixer shell, an air inlet is arranged at the front end of the mixer shell, a mixed gas outlet is arranged at the rear end of the mixer shell, an ammonia gas inlet pipe is arranged close to the air inlet, and the ammonia gas inlet pipe penetrates through the mixer shell and extends into the mixer shell. The mixer is characterized in that a turbulent flow mechanism is arranged in the mixer shell, the turbulent flow mechanism is arranged between the ammonia gas inlet pipe and the mixed gas outlet, the turbulent flow mechanism comprises a turbulent flow shaft and turbulent flow blades, the turbulent flow shaft is rotationally connected to the mixer shell, and the multiple turbulent flow blades are fixedly connected to the turbulent flow shaft. According to the utility model, the mixing uniformity of ammonia gas and air can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitric acid production, in particular to an ammonia-air mixer. Background Art

[0002] Nitric acid is a strong oxidizing and corrosive inorganic acid. It is one of the six inorganic acids and an important chemical raw material. The ammonia oxidation method is the main way to produce nitric acid in industrial production. The main process is to pass a mixture of ammonia and air into a hot platinum-rhodium alloy mesh. Under the catalysis of the alloy mesh, ammonia is oxidized to nitric oxide. The generated nitric oxide is further oxidized to nitrogen dioxide using the residual oxygen after the reaction, and then the nitrogen dioxide is passed into water to produce nitric acid.

[0003] The ammonia-air mixer is an important device used to mix ammonia and air. Whether the ammonia and air are mixed evenly has become an important factor affecting subsequent work. In view of this, technical personnel in the industry have also made certain improvements to the existing ammonia-air mixers. Although certain effects have been achieved, there is still room for improvement. Utility Model Content

[0004] The utility model aims to provide an ammonia-air mixer, which can further improve the uniformity of mixing ammonia and air.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ammonia-air mixer, comprising a mixer shell, an air inlet is arranged at the front end of the mixer shell, a mixed gas outlet is arranged at the rear end of the mixer shell, an ammonia inlet pipe is arranged near the air inlet, the ammonia inlet pipe penetrates the mixer shell and extends into the mixer shell, and is characterized in that a spoiler mechanism is arranged in the mixer shell, the spoiler mechanism is arranged between the ammonia inlet pipe and the mixed gas outlet, the spoiler mechanism comprises a spoiler shaft and a spoiler blade, the spoiler shaft is rotatably connected to the mixer shell, a plurality of spoiler blades are arranged, and the plurality of spoiler blades are fixedly connected to the spoiler shaft.

[0006] As a preferred embodiment of the present technical solution, a plurality of flow-turbulating mechanisms are provided, and the plurality of flow-turbulating mechanisms are staggered along the axial direction of the mixer housing.

[0007] As a preferred embodiment of the present technical solution, the spoiler axes of the spoiler mechanisms are not on the same plane.

[0008] As a preferred embodiment of the present technical solution, one end of the spoiler shaft is rotatably connected to the mixer housing, and the other end is suspended.

[0009] As a preferred embodiment of the present technical solution, the ammonia inlet pipe includes a vertical section and a horizontal section, the vertical section passes through the mixer shell, the horizontal section is located in the mixer shell, and the outlet of the horizontal section faces the mixed gas outlet.

[0010] As a preferred embodiment of the present technical solution, the ammonia inlet pipe includes a vertical section and a horizontal section, the vertical section passes through the mixer shell, the horizontal section is located inside the mixer shell, the outlet of the horizontal section faces the mixed gas outlet and is closed, and the horizontal section is provided with multiple through holes.

[0011] As a preferred embodiment of the present technical solution, the axes of the mixer housing, the air inlet, the mixed gas outlet and the horizontal section are coaxial.

[0012] As a preferred embodiment of the present technical solution, the mixer shell is cylindrical, and the mixer shell includes an upper semicircular shell and a lower semicircular shell. Upper flanges are arranged on both sides of the lower end of the upper semicircular shell, and lower flanges are arranged on both sides of the upper end of the lower semicircular shell. The upper semicircular shell and the lower semicircular shell are detachably connected through the upper flange and the lower flange, and a sealing ring is arranged between the upper flange and the lower flange.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a spoiler mechanism in a mixer shell, the spoiler mechanism includes a spoiler shaft and spoiler blades, the spoiler shaft is rotatably connected to the mixer shell, a plurality of spoiler blades are provided, and the plurality of spoiler blades are fixedly connected to the spoiler shaft, when the mixed gas flows in the shell, the spoiler shaft is driven to rotate, and the spoiler shaft drives the spoiler blades to rotate, thereby disturbing the mixed gas, changing the flow direction of the mixed gas, enhancing the mixing uniformity of the mixed gas, and improving the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 This is another structural schematic diagram of the utility model.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0018] Figure 4 This is another schematic diagram of the cross-sectional structure of the present invention.

[0019] In the figure: 1. mixer housing; 1.1. upper semicircular shell; 1.2. lower semicircular shell; 1.3. upper flange; 1.4. lower flange; 2. ammonia inlet pipe; 2.1. through hole; 3. spoiler shaft; 4. spoiler blade. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model is an ammonia-air mixer, comprising a mixer shell 1, an air inlet is arranged at the front end of the mixer shell 1, a mixed gas outlet is arranged at the rear end of the mixer shell 1, an ammonia inlet pipe 2 is arranged near the air inlet, the ammonia inlet pipe 2 penetrates the mixer shell 1 and extends into the mixer shell 1, a spoiler mechanism is arranged in the mixer shell 1, the spoiler mechanism is arranged between the ammonia inlet pipe 2 and the mixed gas outlet, the spoiler mechanism comprises a spoiler shaft 3 and a spoiler blade 4, the spoiler shaft 3 is rotatably connected to the mixer shell 1, a plurality of spoiler blades 4 are arranged, and a plurality of spoiler blades 4 are fixedly connected to the spoiler shaft 3.

[0022] When the utility model is implemented, a plurality of spoiler mechanisms are arranged, and the plurality of spoiler mechanisms are staggered along the axial direction of the mixer housing 1. The spoiler shaft 3 rotates on the mixer housing 1 through a bearing. The bearing seat of the bearing can be embedded in the mixer housing 1, or can be directly arranged on the mixer housing 1. Both ends of the spoiler shaft 3 can rotate on the mixer housing 1 through bearings, or one end can be rotatably connected to the mixer housing 1, and the other end can be suspended, that is, the suspended end has a certain distance from the mixer housing 1; the spoiler shaft 3 can also be arranged on the same side of the mixer housing 1 at a certain interval, or can be not on the same plane, that is, the spoiler shaft 3 can be in any direction in space to achieve the purpose of sufficient spoiler.

[0023] When the utility model is implemented, the ammonia intake pipe 2 includes a vertical section and a horizontal section. A part of the vertical section is outside the mixer shell 1, and a part passes through the mixer shell 1 to enter the shell. The horizontal section is located in the mixer shell 1, and the outlet of the horizontal section faces the mixed gas outlet. The ammonia intake pipe 2 can also be set to another structure, that is, the outlet of the horizontal section faces the mixed gas outlet and is closed, and the horizontal section is provided with multiple through holes 2.1. After entering the ammonia intake pipe 2, ammonia is sprayed out from the through holes 2.1 of the horizontal section and is mixed with the air for the first time at the through holes 2.1. The through holes 2.1 can be arranged on the two side surfaces and the lower side of the ammonia intake pipe 2. Because the upper side is blocked by the vertical section, the through holes 2.1 do not need to be provided with the upper side.

[0024] When the utility model is implemented, the axes of the mixer housing 1, the air inlet, the mixed gas outlet and the horizontal section are coaxial. The mixer housing 1 is cylindrical, and the mixer housing 1 includes an upper semicircular shell 1.1 and a lower semicircular shell 1.2. Upper flanges 1.3 are arranged on both sides of the lower end of the upper semicircular shell 1.1, and lower flanges 1.4 are arranged on both sides of the upper end of the lower semicircular shell 1.2. The upper flange 1.3 and the lower flange 1.4 are both provided with threaded holes. After the threaded holes are provided with bolts, the upper semicircular shell 1.1 and the lower semicircular shell 1.2 are detachably connected through the upper flange 1.3 and the lower flange 1.4, and a sealing ring is arranged between the upper flange 1.3 and the lower flange 1.4. This structure can facilitate the maintenance of the spoiler mechanism in the mixer housing 1.

[0025] When the utility model is working, air enters from the air inlet of the mixer housing, ammonia enters from the ammonia inlet pipe, and after a through hole is set in the horizontal section of the ammonia inlet pipe, ammonia is sprayed out from the through hole, and is mixed with the air for the first time here. Then, the mixer of ammonia and air reaches the spoiler mechanism, which pushes the spoiler shaft of the spoiler mechanism to rotate, and the spoiler shaft drives the spoiler blades to rotate to disturb the mixed gas, and the forward direction of the mixed gas is changed. The mixed gas is mixed again here, and flows out from the mixed gas outlet of the mixer housing after passing through the spoiler mechanism to enter the next process. The utility model arranges a spoiler mechanism in the mixer housing, and the spoiler mechanism can better disturb the mixed gas, so that the mixing of the mixed gas is more sufficient, and the uniformity of the mixing is improved.

[0026] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An ammonia-air mixer, comprising a mixer housing, an air inlet is arranged at the front end of the mixer housing, a mixed gas outlet is arranged at the rear end of the mixer housing, an ammonia inlet pipe is arranged near the air inlet, the ammonia inlet pipe penetrates the mixer housing and extends into the mixer housing, characterized in that: A spoiler mechanism is arranged in the mixer housing, and the spoiler mechanism is arranged between the ammonia inlet pipe and the mixed gas outlet. The spoiler mechanism includes a spoiler shaft and a spoiler blade. The spoiler shaft is rotatably connected to the mixer housing, and a plurality of spoiler blades are arranged, and the plurality of spoiler blades are fixedly connected to the spoiler shaft.

2. The ammonia-air mixer according to claim 1, characterized in that: The spoiler mechanisms are arranged in plurality, and the spoiler mechanisms are arranged alternately along the axis direction of the mixer housing.

3. The ammonia-air mixer according to claim 2, characterized in that: The spoiler axes of the spoiler mechanism are not on the same plane.

4. The ammonia-air mixer according to claim 3, characterized in that: One end of the spoiler shaft is rotatably connected to the mixer housing, and the other end is suspended.

5. The ammonia-air mixer according to claim 1, characterized in that: The ammonia inlet pipe comprises a vertical section and a horizontal section, the vertical section passes through the mixer shell, the horizontal section is located in the mixer shell, and the outlet of the horizontal section faces the mixed gas outlet.

6. The ammonia-air mixer according to claim 1, characterized in that: The ammonia inlet pipe comprises a vertical section and a horizontal section. The vertical section passes through the mixer shell, and the horizontal section is located inside the mixer shell. The outlet of the horizontal section faces the mixed gas outlet and is closed. The horizontal section is provided with a plurality of through holes.

7. The ammonia-air mixer according to claim 5, characterized in that: The axes of the mixer housing, the air inlet, the mixed gas outlet and the horizontal section are coaxial.

8. The ammonia-air mixer according to claim 1, characterized in that: The mixer shell is cylindrical and includes an upper semicircular shell and a lower semicircular shell. Upper flanges are arranged on both sides of the lower end of the upper semicircular shell, and lower flanges are arranged on both sides of the upper end of the lower semicircular shell. The upper semicircular shell and the lower semicircular shell are detachably connected through the upper flange and the lower flange, and a sealing ring is arranged between the upper flange and the lower flange.

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