A high concentration NOx detection device

Abstract

The utility model discloses a high concentration NOx detection device, including mixing jar body, the one side of mixing jar body is connected with high concentration NOx storage jar through first pipeline, the other side of mixing jar body is connected with high concentration NOx storage jar through second pipeline, and first pipeline one end is equipped with first divergent pipe through first connecting pipe, and second pipeline one end is equipped with second divergent pipe through second connecting pipe, is equipped with overflow pipe on mixing jar body, is equipped with detection box and NOx sensor on overflow pipe, the utility model discloses through being equipped with first divergent pipe and second divergent pipe of the bottom of mixing jar body, and first divergent pipe and second divergent pipe are alternately equipped with a plurality of transversely, make can with NOx gas and oxygen even distribution in mixing jar body realizes the purpose of sufficient mixing, and the gas of mixing completion flows out through overflow pipe and completes mixing, and utilize the NOx sensor detection mixed completion gas's NOx concentration of being equipped with on overflow pipe, convenient for improving the efficiency of NOx mixing.

Description

Technical Field

[0001] This utility model relates to the field of eddy current detection probe technology, specifically a high-concentration NOx detection device. Background Technology

[0002] The primary use of the mixture of NOx (nitrogen oxides) and O2 (oxygen) is in a key step of the industrial production of nitric acid. NO is oxidized to NO2, which then reacts with water to produce nitric acid. In industrial production, nitrogen oxides (NOx) and oxygen react under high-temperature conditions to produce nitrogen dioxide (NO2), which then reacts with water to produce nitric acid (HNO3). This is the core process for producing nitric acid. Simultaneously, in atmospheric pollution scenarios, NOx and oxygen participate in photochemical reactions under ultraviolet radiation, interacting with other pollutants (such as sulfur oxides and hydrocarbons) to form new substances such as ozone, aldehydes, and sulfates, exacerbating air pollution.

[0003] A prior art NOx gas concentration detection platform, with application number 202010559942.9, includes a light source, a gas chamber, a spectrometer, and a mounting platform. The gas chamber, spectrometer, and light source are mounted on the mounting platform in a modular fashion. The light source is connected to the gas chamber via optical fiber, and the gas chamber is connected to the spectrometer via optical fiber. A heating device is installed on the gas chamber to heat the gas inside. A temperature sensor is also installed in the gas chamber to measure the temperature inside. This invention uses ultraviolet differential absorption spectroscopy to directly measure the NOx gas concentration in the gas. It has a heating and temperature control function to prevent water vapor from affecting the detection effect and a buffer device to prevent environmental vibration from affecting the detection on the mounting platform. However, it is not convenient for NOx gas and oxygen to mix fully, resulting in a relatively slow mixing rate, which affects the efficiency of NOx mixing detection. Utility Model Content

[0004] The purpose of this invention is to provide a high-concentration NOx detection device to solve the problem in the prior art that it is not easy to fully mix NOx gas and oxygen, resulting in a slow mixing rate and thus affecting the efficiency of NOx mixing detection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-concentration NOx detection device, comprising a mixing tank and a PLC control cabinet for operation, wherein a high-concentration NOx storage tank is connected to one side of the mixing tank via a first pipe, and a high-concentration oxygen storage tank is connected to the other side of the mixing tank via a second pipe, wherein a first diverging pipe is provided at one end of the first pipe via a first connecting pipe, and a second diverging pipe is provided at one end of the second pipe via a second connecting pipe, wherein multiple first and second diverging pipes are arranged alternately in the transverse direction, and an overflow pipe is provided at the upper end of the mixing tank, wherein a detection box and a NOx sensor are provided on the overflow pipe.

[0006] Furthermore, the first pipe and the second pipe are respectively located on both sides of the bottom of the mixing tank, and both the first pipe and the second pipe are equipped with flow valves.

[0007] Furthermore, both the first connecting pipe and the second connecting pipe are configured as arc-shaped pipes, and multiple first and second diverging pipes are provided at equal intervals.

[0008] Furthermore, the first and second diverging tubes are provided with air outlets on their upper sides, and multiple air outlets are provided at equal intervals.

[0009] Furthermore, a stirring shaft is rotatably mounted on the top of the mixing tank via a bearing, and upper and lower stirring blades are mounted on the lower end of the stirring shaft via a mounting base.

[0010] Furthermore, one end of the stirring shaft is connected to an electric motor via a gear set, and the electric motor is fixedly installed on the top of the mixing tank.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a first and second diverging pipe located at the bottom of the mixing tank, with multiple first and second diverging pipes arranged alternately laterally. Multiple gas outlets are located on the upper side of the first and second diverging pipes, enabling the uniform distribution of NOx gas and oxygen within the mixing tank for thorough mixing. The mixing rate is relatively fast. The mixed gas flows out through an overflow pipe, and a NOx sensor on the overflow pipe detects the NOx concentration of the mixed gas, thus improving the efficiency of NOx mixing.

[0012] This invention utilizes a stirring shaft mounted on the top of a mixing tank via a bearing. The lower end of the stirring shaft is equipped with upper and lower stirring blades via a mounting base. One end of the stirring shaft is connected to an electric motor via a gear set, and the electric motor is fixedly mounted on the top of the mixing tank. This allows the stirring shaft and stirring blades to be rotated and adjusted in the upper part of the mixing tank by the electric motor and gear set, enabling a second dynamic mixing of NOx gas and oxygen, which is beneficial for further improving the uniformity of the NOx gas and oxygen mixture. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a first-view structural diagram of the internal structure of the mixing tank of this utility model; Figure 3 This is a structural diagram of the internal second-view plate of the mixing tank of this utility model.

[0014] In the diagram: 1. Mixing tank; 2. NOx storage tank; 3. First pipeline; 4. Flow valve; 5. Second pipeline; 6. Oxygen storage tank; 7. Second connecting pipe; 8. First connecting pipe; 9. First diverging pipe; 10. Second diverging pipe; 11. Gas outlet; 12. Stirring shaft; 13. Gear set; 14. Motor; 15. Overflow pipe; 16. Detection box; 17. NOx sensor; 18. Lower stirring blade; 19. Upper stirring blade; 20. Mounting base; 21. PLC control cabinet. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 , Figure 2 , Figure 3 In this embodiment of the present invention, a high-concentration NOx detection device includes a mixing tank 1 and a PLC control cabinet 21 for operation. A high-concentration NOx storage tank 2 is connected to one side of the mixing tank 1 via a first pipe 3, and a high-concentration oxygen storage tank 6 is connected to the other side of the mixing tank 1 via a second pipe 5. A first diverging pipe 9 is provided at one end of the first pipe 3 via a first connecting pipe 8, and a second diverging pipe 10 is provided at one end of the second pipe 5 via a second connecting pipe 7. Multiple first diverging pipes 9 and second diverging pipes 10 are arranged alternately laterally. Both the first connecting pipe 8 and the second connecting pipe 7 are arranged in an arc shape, and the first diverging pipe 9 and the second diverging pipe 10 are arranged in an arc shape. Multiple diverging pipes 10 are evenly spaced. The first diverging pipe 9 and the second diverging pipe 10 are provided with gas outlets 11 on their upper sides, and multiple gas outlets 11 are evenly spaced, so that NOx gas and oxygen can be evenly distributed in the mixing tank 1 to achieve the purpose of thorough mixing and a fast mixing rate. The mixing tank 1 is provided with an overflow pipe 15 at the upper end. The overflow pipe 15 is provided with a detection box 16 and a NOx sensor 17. The mixed gas flows out through the overflow pipe 15 to complete the mixing, and the NOx concentration of the mixed gas is detected by the NOx sensor 17 provided on the overflow pipe 15, which helps to improve the efficiency of NOx mixing production.

[0017] like Figure 1 and Figure 3As shown, the first pipe 3 and the second pipe 5 are respectively set on both sides of the bottom of the mixing tank 1, and both the first pipe 3 and the second pipe 5 are equipped with flow valves 4 to facilitate control of the amount of gas added.

[0018] like Figure 2 and Figure 3 As shown, in order to improve the uniformity of NOx gas and oxygen mixing, a stirring shaft 12 is rotatably provided at the top of the mixing tank 1 via a bearing. The lower end of the stirring shaft 12 is provided with an upper stirring blade 19 and a lower stirring blade 18 via a mounting base 20. One end of the stirring shaft 12 is connected to a motor 14 via a gear set 13, and the motor 14 is fixedly installed at the top of the mixing tank 1. This allows the stirring shaft 12 and stirring blades to be driven by the motor 14 and the gear set 13 to rotate and adjust in the upper part of the mixing tank 1, which enables the NOx gas and oxygen to be dynamically mixed again, which is beneficial to further improve the uniformity of NOx gas and oxygen mixing.

[0019] The working principle and usage process of this utility model are as follows: During use, the first diverging pipe 9 and the second diverging pipe 10 are provided at the bottom of the mixing tank 1, and multiple first diverging pipes 9 and the second diverging pipes 10 are alternately arranged in the horizontal direction. Multiple gas outlets 11 are provided on the upper side of the first diverging pipes 9 and the second diverging pipes 10, so that NOx gas and oxygen can be evenly distributed in the mixing tank 1 to achieve the purpose of thorough mixing. The mixing rate is relatively fast. The mixed gas flows out through the overflow pipe 15 to complete the mixing. The NOx concentration of the mixed gas is detected by the NOx sensor 17 provided on the overflow pipe 15, which helps to improve the NOx mixing efficiency.

[0020] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-concentration NOx detection device, comprising a mixing tank (1), characterized in that: One side of the mixing tank (1) is connected to a high-concentration NOx storage tank (2) via a first pipe (3), and the other side of the mixing tank (1) is connected to a high-concentration oxygen storage tank (6) via a second pipe (5). One end of the first pipe (3) is provided with a first divergence pipe (9) via a first connecting pipe (8), and one end of the second pipe (5) is provided with a second divergence pipe (10) via a second connecting pipe (7). Multiple first divergence pipes (9) and second divergence pipes (10) are arranged alternately in the horizontal direction. An overflow pipe (15) is provided at the upper end of the mixing tank (1), and a detection box (16) and a NOx sensor (17) are provided on the overflow pipe (15).

2. The high-concentration NOx detection device according to claim 1, characterized in that: The first pipe (3) and the second pipe (5) are respectively located on both sides of the bottom of the mixing tank (1), and both the first pipe (3) and the second pipe (5) are equipped with flow valves (4).

3. The high-concentration NOx detection device according to claim 1, characterized in that: The first connecting pipe (8) and the second connecting pipe (7) are both set as arc-shaped pipes, and the first diverging pipe (9) and the second diverging pipe (10) are both provided with multiple pipes at equal intervals.

4. The high-concentration NOx detection device according to claim 3, characterized in that: The first radiating tube (9) and the second radiating tube (10) are provided with air outlets (11) on their upper sides, and multiple air outlets (11) are provided at equal intervals.

5. The high-concentration NOx detection device according to claim 1, characterized in that: The mixing tank (1) has a stirring shaft (12) rotatably mounted on the top of the tank via a bearing. The lower end of the stirring shaft (12) is provided with an upper stirring blade (19) and a lower stirring blade (18) via a mounting base (20).

6. The high-concentration NOx detection device according to claim 5, characterized in that: One end of the stirring shaft (12) is connected to an electric motor (14) via a gear set (13), and the electric motor (14) is fixedly installed on the top of the mixing tank (1).

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