Portable flue gas sampling and measuring integrated probe device

Abstract

The utility model discloses a portable flue gas sampling and measuring integrated probe device which comprises a measuring cavity, a primary filter element and a secondary filter element are arranged at the front end of the measuring cavity, a reverse blowing opening is formed in the front end of the secondary filter element and communicated with a calibration pipe, and a reflecting mirror and a glass window are arranged at the other end of the measuring cavity. An oxygen measuring sensor is connected to the glass window, part of the glass window penetrates out of the measuring cavity, an adjusting frame is further installed at one end of the outer side of the glass window, and a light inlet end lens and a light outlet end lens are installed on the adjusting frame. According to the utility model, the flue gas filtering unit, the blowback unit, the calibration unit, the real-time temperature monitoring unit, the oxygen content measuring unit and the flue gas component measuring unit are integrally designed on the integrated measuring device, so that the functions of quick response and real-time measurement are realized.

Description

Technical Field

[0001] The utility model relates to a portable integrated probe device for flue gas sampling and measurement. Background Art

[0002] With the progress of human society and science and technology, electricity has occupied the most important position in production and activities. The continuous development of the power industry has also brought about related environmental pollution problems. The high energy consumption and strong pollution problems of thermal power plants, which account for more than half of the world's production, have never been fundamentally solved. The combustion of coal not only produces a large amount of coal dust and dust, but also produces harmful gases such as carbon dioxide, sulfide and nitrogen oxides, which cause great pollution to the environment. Therefore, many countries and regions have introduced strict air pollution control regulations and emission standards, which stipulate the emission limits of nitrogen oxides and sulfur dioxide during fuel combustion, and prompt enterprises to adopt technical means to control emissions.

[0003] Through research, it is found that accurate measurement of flue gas components has a great impact on pollution control and emissions. Inaccurate or delayed measurement will directly affect the accuracy of ammonia injection. When the amount of ammonia injection is less than the NOx content that can occur in the flue, it will directly lead to over-emission and damage the atmospheric environment. Excessive ammonia injection will damage the flue and various instruments on the flue wall due to excessive adhesion of ammonia, causing blockage, accumulation and corrosion, etc. Therefore, accurate and efficient measurement of flue gas components cannot be ignored in the thermal power generation industry.

[0004] Under the existing measurement and control technology, there are various methods for measuring common nitrogen oxides and sulfur dioxide, including chemiluminescence, ultraviolet fluorescence, etc. According to different measurement principles, the industry has corresponding NOx and SO2 measurement, monitoring and control technologies based on this principle.

[0005] The prior art has the following disadvantages:

[0006] 1. The extraction NOx measurement system is very complicated and cumbersome from dilution sampling to local heating and then to analyzer measurement. There are measurement delays and a large amount of maintenance. At the same time, due to the measurement delay, it is unable to quickly reflect the rapid dynamic changes of the volume fraction of the gas to be measured in the flue gas in real time, and it still has certain limitations. In addition, the measurement of flue gas components under the extraction principle is divided into separate component measurement modes according to the principle, which makes the measurement more troublesome.

[0007] 2. Although the measurement response time of the in-situ measuring instrument is much faster than that of the extraction type, and the system is no longer complicated, the integration of the flue gas sampling unit and the measuring unit generally has a large structure volume and is not light enough. To achieve complete flue gas sampling, measurement and instrument calibration backflush and other functions, more structural units need to cooperate with each other, which is inconvenient to maintain.

[0008] In order to solve these problems, the present utility model is hereby proposed. Utility Model Content

[0009] The utility model aims to provide a portable integrated probe device for flue gas sampling and measurement.

[0010] One purpose of the utility model can be achieved by the following technical solutions:

[0011] A portable integrated flue gas sampling and measurement probe device comprises a measuring cavity, wherein a primary filter element and a secondary filter element are arranged at the front end of the measuring cavity, a back-blowing port is arranged at the front end of the secondary filter element, and a calibration tube is connected to the back-blowing port, and a reflector and a glass window are arranged at the other end of the measuring cavity, an oxygen measuring sensor is connected to the glass window, and part of the glass window passes through the measuring cavity, and an adjustment frame is also installed at one end outside the glass window, and a light input end lens and a light output end lens are installed on the adjustment frame.

[0012] Preferably, the oxygen sensor is a zirconium oxide probe.

[0013] Preferably, a fixing plate is fixed on the outer side of the glass window, and a fixing nut is installed on the fixing plate.

[0014] Furthermore, a switch manual valve is installed on the fixed plate.

[0015] Preferably, the primary filter element and the secondary filter element are flue gas filtration units, the back-blowing port is a back-blowing unit, the calibration tube is a calibration unit, temperature sensor 1 and temperature sensor 2 are real-time temperature monitoring units, the oxygen sensor is an oxygen measurement unit, and the light input end lens and the light output end lens are flue gas component measurement units.

[0016] Furthermore, the measuring cavity is connected to an ejector, one end of the ejector is an air inlet, and the other end is an exhaust pipe outlet.

[0017] Furthermore, temperature sensor 1 and temperature sensor 2 are arranged inside the measuring cavity.

[0018] Beneficial technical effects:

[0019] 1. The utility model realizes the functions of rapid response and real-time measurement by centrally designing a flue gas filtration unit, a backflush unit, a calibration unit, a real-time temperature monitoring unit, an oxygen measurement unit, and a flue gas component measurement unit on an integrated measuring device.

[0020] 2. The present invention reduces the maintenance workload by designing an integrated and lightweight flue gas sampling and measuring device. During inspection or regular maintenance, only the integrated device needs to be maintained or replaced separately, which greatly reduces the maintenance workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a side structural schematic diagram of the integrated probe device of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the integrated probe device of the utility model when viewed from the left.

[0024] In the figure: 1. fixing plate; 2. measuring chamber; 3. oxygen sensor; 4. adjusting bracket; 5. air inlet; 6. ejector; 7. tail pipe outlet; 8. temperature sensor 1; 9. secondary filter element; 10. primary filter element; 11. backflush outlet; 12. temperature sensor 2; 13. reflector; 14. glass window; 15. fixing nut; 16. switch manual valve; 17. calibration tube; 18. pressure sensor; 19. light input end lens; 20. light output end lens. DETAILED DESCRIPTION

[0025] The following will be combined with 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 of 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.

[0026] like Figure 1 and Figure 2 As shown, a portable integrated probe device for flue gas sampling and measurement includes a measuring chamber 2, a primary filter element 10 and a secondary filter element 9 are arranged at the front end of the measuring chamber 2, a back-blowing port 11 is arranged at the front end of the secondary filter element 9, and the back-blowing port 11 is connected to a calibration tube 17. A reflector 13 and a glass window 14 are arranged at the other end of the measuring chamber 2, and an oxygen sensor 3 is connected to the glass window 14. The oxygen sensor 3 is a zirconium oxide probe; part of the glass window 14 passes through the measuring chamber 2, and an adjustment frame 4 is also installed at one end of the outer side of the glass window 14. The adjustment frame 4 is installed with a light-input end lens 19 and a light-output end lens 20.

[0027] A fixing plate 1 is fixed to the outside of the glass window 14 , and the fixing plate 1 is used to fix the entire portable flue gas sampling and measurement integrated probe device.

[0028] A fixing nut 15 and a switch manual valve 16 are installed on the fixing plate 1.

[0029] The light input end lens 19 and the light output end lens 20 collect light and converge it into the spectrometer.

[0030] The primary filter element 10 and the secondary filter element 9 are flue gas filtering units, the back-blowing port 11 is a back-blowing unit, the calibration tube 17 is a calibration unit, the temperature sensor 1 8 and the temperature sensor 2 12 are real-time temperature monitoring units, the oxygen sensor 3 is an oxygen measurement unit, and the light input end lens 19 and the light output end lens 20 are flue gas component measurement units.

[0031] The measuring chamber 2 is connected to an ejector 6, one end of the ejector 6 is an air inlet 5, and the other end is an exhaust pipe port 7. A temperature sensor 1 8 and a temperature sensor 2 12 are arranged inside the measuring chamber 2.

[0032] The temperature sensor 1 8 and the temperature sensor 2 12 use temperature measuring wires.

[0033] It also includes a pressure sensor 18, which is an external measurement pipeline provided by the gas pressure sensor.

[0034] The fixed plate 1 is provided with pipeline interfaces of the air inlet 5 and the tail gas pipe outlet 7. For neatness and to prevent air leakage, the pipelines are all led out from the bottom.

[0035] The switch manual valve 16 supports the integrated probe device.

[0036] When in use, the flue gas enters the measuring chamber 2 after passing through the primary filter element 10 and the secondary filter element 9, and is discharged from the tail gas pipe port 7. In the measuring chamber 2, according to the ultraviolet differential measurement principle, NOx and SO2 molecules absorb light of certain wavelengths. According to this principle, the volume concentration of NOx and SO2 in the measuring chamber can be measured in real time. Since the space of the measuring chamber 2 is small and the flue gas is updated quickly, it can achieve fast response and accurate measurement of nitrogen oxides and sulfur dioxide.

[0037] This integrated structure realizes dust filtration, flue gas collection, sample gas calibration, negative pressure state measurement, temperature measurement, NOx measurement, SO2 measurement, and O2 measurement. The lightweight integrated design enhances the operating stability of the equipment and reduces maintenance workload.

[0038] Because the molecules of flue gas components are directly affected by molecular thermal motion, in the case of in-situ sampling, the temperature performance under different working conditions is different, and the temperature interference directly affects the measurement results. In order to ensure the accuracy and repeatability of the measurement results, the in-situ instrument measurement and the cavity instrument heating are used to directly eliminate the temperature interference. The measurement unit is combined with the gas path sampling unit, and the dual heat conduction method of setting a high-temperature heating source through the flue's own heat source and the protective cover is used to strictly control the influence of the gas Brownian motion on the accuracy of the measurement results under the condition of changing working conditions.

[0039] Through in-situ probe sampling and direct measurement, real-time response and accurate measurement of flue gas components can be achieved, which can respond ahead of the measurement method based on the extraction principle, and is conducive to the realization of denitrification and desulfurization projects under more accurate automatic control, making precise ammonia injection automatic control more efficient. At the same time, the invention of the portable integrated flue gas sampling and measurement probe device has also optimized the measurement stability and operating efficiency of the in-situ instrument from the perspective of structural design, making the in-situ instrument more complete in function, more integrated in system, more stable in operation, and easier to maintain.

[0040] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A portable integrated smoke sampling and measuring probe device, comprising a measuring chamber (2), characterized in that: The front end of the measuring chamber (2) is provided with a primary filter element (10) and a secondary filter element (9), the front end of the secondary filter element (9) is provided with a backflush port (11), the backflush port (11) is connected to a calibration tube (17), the other end of the measuring chamber (2) is provided with a reflector (13) and a glass window (14), the glass window (14) is connected with an oxygen sensor (3), a part of the glass window (14) passes through the measuring chamber (2), an adjustment frame (4) is also installed at one end outside the glass window (14), and a light input end lens (19) and a light output end lens (20) are installed on the adjustment frame (4).

2. The portable integrated smoke sampling and measuring probe device according to claim 1 is characterized in that: The oxygen sensor (3) is a zirconium oxide probe.

3. The portable integrated smoke sampling and measuring probe device according to claim 2 is characterized in that: A fixing plate (1) is fixed on the outside of the glass window (14).

4. The portable integrated smoke sampling and measuring probe device according to claim 3 is characterized in that: A fixing nut (15) is installed on the fixing plate (1).

5. The portable integrated smoke sampling and measuring probe device according to claim 3 is characterized in that: The fixed disk (1) is provided with an on / off manual valve (16).

6. The portable integrated smoke sampling and measuring probe device according to claim 2 is characterized in that: The primary filter element (10) and the secondary filter element (9) are smoke filtering units, the back-blowing port (11) is a back-blowing unit, the calibration tube (17) is a calibration unit, and the temperature sensor 1 (8) and the temperature sensor 2 (12) are real-time temperature monitoring units.

7. The portable integrated smoke sampling and measuring probe device according to claim 2 is characterized in that: The oxygen sensor (3) is an oxygen quantity measuring unit, and the light input end lens (19) and the light output end lens (20) are flue gas component measuring units.

8. The portable integrated smoke sampling and measuring probe device according to claim 1 is characterized in that: The measuring chamber (2) is connected to an ejector (6), one end of the ejector (6) is an air inlet (5), and the other end is an exhaust pipe outlet (7).

9. The portable integrated smoke sampling and measuring probe device according to claim 8 is characterized in that: A temperature sensor (8) is arranged inside the measuring cavity (2).

10. The portable integrated smoke sampling and measuring probe device according to claim 8, characterized in that: A second temperature sensor (12) is arranged inside the measuring cavity (2).

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