Nitrogen dioxide sensing device suitable for high temperature and high pressure

Abstract

The utility model provides a nitrogen dioxide sensing device suitable for high temperature and high pressure, which comprises an ejector, a detection sensing part and a terminal strip, the ejector is connected with the detection sensing part, and the ejector is connected with the detection sensing part and the terminal strip; the ejector is connected with an ejector flowmeter and an ejector electromagnetic valve; the detection sensing part comprises a metal filter, a detection sensing part electromagnetic valve, a gas tank, a detection sensing part flowmeter, a polymeric membrane filter and a nitrogen dioxide analyzer, the ejector is adopted to replace a common drainage tube, detected gas can be more stably guided to the detection sensing part in a high-temperature and high-pressure environment, and the detection sensing part can be used for detecting nitrogen dioxide in the high-temperature and high-pressure environment. The heat shield is additionally arranged on the detection sensing part, so that stable operation of all parts is guaranteed, and the situation that the nitrogen dioxide sensing device fails or is consumed too fast due to the high-temperature and high-pressure environment is reduced.

Description

Technical Field

[0001] The utility model relates to the field of environmental monitoring, in particular to a nitrogen dioxide sensing device applicable to high temperature and high pressure. Background Art

[0002] Nitrogen dioxide will pollute the atmospheric environment, exacerbate the formation of the ozone hole, affect the photosynthesis of plants, reduce air quality, and lead to the imbalance of the ecosystem. At the same time, nitrogen dioxide will damage the human nervous system, immune system, respiratory system, etc. Therefore, it is necessary to monitor the emission of nitrogen dioxide. In high-energy-consuming industrial and mining enterprises such as refineries, chemical plants, and steel plants, there are working conditions of high temperature and high pressure. The nitrogen dioxide sensing device will malfunction or be damaged too quickly due to the high temperature and high pressure environment. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a nitrogen dioxide sensing device applicable to high temperature and high pressure. By using an ejector to replace the commonly used drainage pipe, in a high temperature and high pressure environment, the measured gas can be more stably guided to the detection and sensing part. An insulating cover is installed on the detection and sensing part to ensure the stable operation of each component and reduce the situation that the nitrogen dioxide sensing device malfunctions or is damaged too quickly due to the high temperature and high pressure environment.

[0004] To achieve the above purpose, the utility model has taken the following technical solutions.

[0005] A nitrogen dioxide sensing device applicable to high temperature and high pressure includes an ejector, a detection and sensing part, and a terminal block. The ejector is connected to the detection and sensing part, and the ejector, the detection and sensing part are connected to the terminal block; the ejector is connected to an ejector flowmeter and an ejector solenoid valve; the detection and sensing part includes a metal filter, a detection and sensing part solenoid valve, a gas tank, a detection and sensing part flowmeter, a polymer membrane filter, and a nitrogen dioxide analyzer. The metal filter is connected to the detection and sensing part solenoid valve, the detection and sensing part solenoid valve is connected to the gas tank and the detection and sensing part flowmeter, the detection and sensing part flowmeter is connected to the polymer membrane filter, and the polymer membrane filter is connected to the nitrogen dioxide analyzer.

[0006] Further, an insulating cover is provided on the detection and sensing part.

[0007] Further, the gas tank includes a zero gas tank and a nitrogen dioxide gas tank.

[0008] Further, the filtering aperture of the metal filter is larger than that of the polymer membrane filter.

[0009] Further, input contacts and output contacts corresponding to the injector, the injector flowmeter, the injector solenoid valve, the detection sensor solenoid valve, the detection sensor flowmeter, and the nitrogen dioxide analyzer are provided on the terminal block.

[0010] Further, the metal filter is disposed close to the injector.

[0011] The positive effects of the utility model applicable to the high-temperature and high-pressure nitrogen dioxide sensing device are as follows:

[0012] By using an injector to replace the commonly used drainage pipe, the utility model can more stably guide the gas to be measured to the detection sensor part in a high-temperature and high-pressure environment. A heat insulation cover is installed on the detection sensor part to ensure the stable operation of each component and reduce the situation that the nitrogen dioxide sensing device fails or wears out too quickly due to the high-temperature and high-pressure environment. Description of the Drawings

[0013] Figure 1 is a schematic diagram provided by an embodiment of the utility model.

[0014] The reference numerals in the figure are respectively:

[0015] 1. Injector; 2. Terminal block; 3. Metal filter; 4. Detection sensor solenoid valve; 5. Gas tank; 6. Detection sensor flowmeter; 7. Polymer membrane filter; 8. Nitrogen dioxide analyzer; 9. Heat insulation cover; 10. Injector flowmeter; 11. Injector solenoid valve. Detailed Embodiments

[0016] The following provides the detailed embodiments of the utility model applicable to the high-temperature and high-pressure nitrogen dioxide sensing device in conjunction with the accompanying drawings. However, it should be noted that the detailed embodiments are not used to limit the specific implementation of the utility model. Any similar structure and its similar changes of the utility model should be included in the protection scope of the utility model. The description of the following embodiments refers to the attached drawings to illustrate specific embodiments in which the utility model can be implemented. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., are only references to the directions of the attached drawings. Therefore, the directional terms used are for explaining and understanding the utility model, rather than for limiting the utility model.

[0017] See Figure 1A nitrogen dioxide sensing device applicable to high temperature and high pressure, comprising an ejector 1, a detection and sensing part, and a terminal block 2. The ejector 1 is connected to the detection and sensing part, and the ejector 1, the detection and sensing part, and the terminal block 2 are connected. The ejector 1 is connected to an ejector flowmeter 10 and an ejector solenoid valve 11. The detection and sensing part includes a metal filter 3, a detection and sensing part solenoid valve 4, a gas tank 5, a detection and sensing part flowmeter 6, a polymer membrane filter 7, and a nitrogen dioxide analyzer 8. The metal filter 3 is connected to the detection and sensing part solenoid valve 4. The detection and sensing part solenoid valve 4 is connected to the gas tank 5 and the detection and sensing part flowmeter 6. The detection and sensing part flowmeter 6 is connected to the polymer membrane filter 7. The polymer membrane filter 7 is connected to the nitrogen dioxide analyzer 8.

[0018] The ejector 1 uses an air ejector 1. The function of the ejector 1 is to direct the measured gas to the detection and sensing part. In the working condition where the dust content in the flue gas is high, the ejector 1 may be blocked and corroded, and it is necessary to remove the ejector 1 from the furnace wall and clean the air holes. In this embodiment, the air inlet flow rate of the ejector 1 is 8 - 12 liters per minute, and the applicable temperature of the ejector 1 is 1500 degrees Celsius. The length of the ejector 1 is 500 - 1500 millimeters. In this embodiment, an ejector 1 with a length of 1200 millimeters is used. The ejector 1 uses AC230V, 60HZ.

[0019] The ejector 1 is connected to the ejector flowmeter 10 and the ejector solenoid valve 11 through a copper pipe. The copper pipe is used for containing air. The diameter of the copper pipe is 4 - 12 millimeters. In this embodiment, a 10 - millimeter copper pipe is used. When the air pressure is less than 300Kpa, a pressure reducing valve is not required. When it is higher than 300Kpa, a pressure reducing valve needs to be added.

[0020] The ejector 1 is connected to the detection and sensing part through a Teflon tube. The diameter of the Teflon tube is 4 - 8 millimeters. In this embodiment, a 6 - millimeter Teflon tube is used. When the gas pressure of the detection and sensing part is less than 100Kpa, a pressure reducing valve is not required. When it is higher than 1300Kpa, a pressure reducing valve needs to be added.

[0021] The detection and sensing part is provided with a heat insulation cover 9. The heat insulation cover 9 is provided with a heat insulation coating, and the heat insulation coating uses a zirconium diboride coating. The gas tank 5 includes a zero - point gas tank 5 and a nitrogen dioxide gas tank 5. The gas tank 5 is used for calibrating the data of the nitrogen dioxide analyzer 8. The metal filter 3 is arranged close to the ejector 1. The filtration aperture of the metal filter 3 is larger than that of the polymer membrane filter 7. In the working condition where the dust content in the flue gas is high, multiple metal filters 3 can be arranged.

[0022] The terminal block 2 is provided with input contacts and output contacts corresponding to the injector 1, the injector flowmeter 10, the injector solenoid valve 11, the detection and sensing unit solenoid valve 4, the detection and sensing unit flowmeter 6, and the nitrogen dioxide analyzer 8.

[0023] The flue gas to be measured is led to the detection and sensing unit through the injector 1. First, it passes through the metal filter 3 to filter out large particulate dust, then through the detection and sensing unit solenoid valve 4, then through the detection and sensing unit flowmeter 6, then through the polymer membrane filter 7, and finally reaches the nitrogen dioxide analyzer 8 for the analysis of the nitrogen dioxide content.

[0024] By using the injector 1 to replace the commonly used drainage pipe, the utility model can more stably guide the gas to be measured to the detection and sensing unit in a high-temperature and high-pressure environment. An insulation cover 9 is installed on the detection and sensing unit to ensure the stable operation of each component and reduce the situation that the nitrogen dioxide sensing device fails or wears out too quickly due to the high-temperature and high-pressure environment.

Claims

1. A nitrogen dioxide sensing device applicable to high temperature and high pressure, characterized in that, It includes an injector, a detection and sensing part, and a terminal block. The injector is connected to the detection and sensing part, and the injector and the detection and sensing part are connected to the terminal block; the injector is connected to an injector flowmeter and an injector solenoid valve; the detection and sensing part includes a metal filter, a detection and sensing part solenoid valve, a gas tank, a detection and sensing part flowmeter, a polymer membrane filter, and a nitrogen dioxide analyzer. The metal filter is connected to the detection and sensing part solenoid valve, the detection and sensing part solenoid valve is connected to the gas tank and the detection and sensing part flowmeter, the detection and sensing part flowmeter is connected to the polymer membrane filter, and the polymer membrane filter is connected to the nitrogen dioxide analyzer.

2. The high-temperature and high-pressure nitrogen dioxide sensing device according to claim 1, wherein, The detection and sensing part is provided with a heat shield.

3. The high-temperature and high-pressure nitrogen dioxide sensing device according to claim 1, wherein The gas tank includes a zero gas tank and a nitrogen dioxide gas tank.

4. The high-temperature and high-pressure nitrogen dioxide sensing device according to claim 1, characterized in that, The filtering aperture of the metal filter is larger than that of the polymer membrane filter.

5. The high-temperature and high-pressure nitrogen dioxide sensing device according to claim 1, wherein Input contacts and output contacts corresponding to the injector, the injector flowmeter, the injector solenoid valve, the detection and sensing part solenoid valve, the detection and sensing part flowmeter, and the nitrogen dioxide analyzer are provided on the terminal block.

6. The high-temperature and high-pressure nitrogen dioxide sensing device according to claim 1, characterized in that, The metal filter is arranged close to the injector.

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