Tail gas denitration detection device

Abstract

The utility model discloses a tail gas denitration detection device, including filter box, the left side intercommunication of filter box has first air pipe, the inside slide coupling of filter box has filter board, the top extension of filter board to the top of filter box and fixedly connected with handle, the left side intercommunication of first air pipe has filter frame, the inside fixedly connected with filter screen of filter frame. The utility model discloses adopting tail gas to carry out first -stage rough filtration to filter board first, and then through filter screen to complete second -stage fine filtration, layer by layer, effectively intercepts the complex impurity in tail gas, avoids its blockage sampling pipeline. Meanwhile, adopting annular distribution's sampling hole and high temperature -resistant, corrosion -resistant sampling probe, greatly promoted the comprehensiveness and reliability of sampling, ensure that the tail gas sample of collection can accurately reflect the real situation of power station tail gas, significantly enhance the detection effect, and the device has the advantages of good detection effect and detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of denitrification detection technology, specifically to a tail gas denitrification detection device. Background Technology

[0002] In land-based power plants, fuel combustion produces large amounts of nitrogen oxides (NOx). x The exhaust gas from power plants is often treated with denitrification technology to reduce nitrogen oxide pollution. Accurately detecting the nitrogen oxide content in the denitrified exhaust gas is crucial for evaluating the denitrification effect and ensuring that the power plant's exhaust gas meets emission standards.

[0003] Existing exhaust gas denitrification detection devices have some problems when applied to land-based power plants. The exhaust gas from power plants has a complex composition, containing not only nitrogen oxides but also a large amount of dust. These impurities can easily clog sampling pipes, affecting the normal operation of the detection device and the accuracy of the detection results. Therefore, it is necessary to develop an exhaust gas denitrification detection device specifically designed for land-based power plants to improve the accuracy, stability, and real-time performance of the detection, and ensure the environmentally friendly operation of the power plant. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a tail gas denitrification detection device with the advantages of good detection effect and accuracy. It solves the problem that when existing tail gas denitrification detection devices are applied to land-based power plants, the tail gas composition of the power plant is complex. In addition to nitrogen oxides, it also contains a large amount of dust. These impurities can easily clog the sampling pipes, affecting the normal operation of the detection device and the accuracy of the detection results.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tail gas denitrification detection device, comprising a filter box, a first air duct connected to the left side of the filter box, a filter plate slidably connected inside the filter box, the top of the filter plate extending to the top of the filter box and fixedly connected to a handle, a filter frame connected to the left side of the first air duct, a filter screen fixedly connected inside the filter frame, the filter screen being fan-shaped and evenly distributed in a ring inside the filter frame, a second air duct connected to the left side of the filter frame, a sampling head disposed inside the second air duct, a number of sampling holes disposed on the surface of the sampling head, the sampling holes being evenly distributed in a ring on the surface of the sampling head, a sampling tube connected to the left side of the sampling head, the end of the sampling tube away from the sampling head extending to the outside of the second air duct and fixedly connected to a sampling pump, a detection component fixedly connected to the surface of the second air duct via a bracket, and the outlet of the sampling pump communicating with the detection component.

[0006] As a preferred embodiment of this utility model, a scraper frame is slidably connected inside the filter box, the top of the scraper frame extends to the top of the filter box, and an electric cylinder is fixedly connected to the back of the filter box, with the output end of the electric cylinder fixedly connected to the scraper frame.

[0007] As a preferred embodiment of this utility model, the filter frame is rotatably connected to a rotating shaft, a brush holder is fitted on the surface of the rotating shaft, the brush holder is in contact with the filter screen, and a fan blade is fixedly connected to the right side of the rotating shaft.

[0008] As a preferred embodiment of this invention, a mounting block is fixedly connected to the top of the filter plate, and the mounting block is fixedly connected to the filter box by bolts.

[0009] As a preferred embodiment of this utility model, the surfaces of the filter box and the first air duct are both connected to a storage box, and the interior of the storage box is slidably connected to a drawer, the front of the drawer extending to the front of the storage box and fixedly connected to a handle.

[0010] As a preferred embodiment of this invention, the detection component includes a nitrogen oxide sensor, an oxygen sensor, and a temperature sensor.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model employs a first-stage coarse filtration process using a filter plate followed by a second-stage fine filtration using a filter screen. This multi-stage process effectively intercepts complex impurities in the exhaust gas, preventing them from clogging the sampling pipes. Simultaneously, the use of annularly distributed sampling holes and high-temperature and corrosion-resistant sampling probes greatly enhances the comprehensiveness and reliability of the sampling, ensuring that the collected exhaust gas samples accurately reflect the true condition of the power plant's exhaust gas and significantly improving the detection effect. This device boasts the advantages of excellent detection effect and accuracy.

[0013] 2. This utility model uses a scraper frame and an electric cylinder. The electric cylinder extends or retracts, which in turn drives the scraper frame to move up or down. When the scraper frame moves up and down, it scrapes off the impurities accumulated on the right side of the filter plate. The scraped impurities fall into the storage box on the right side. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front sectional view of the filter box, the first air duct, and the second air duct of this utility model.

[0016] Figure 3 This is a schematic diagram of the filter frame structure of this utility model;

[0017] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Filter box; 2. Filter plate; 3. First air duct; 4. Filter frame; 5. Filter screen; 6. Second air duct; 7. Sampling head; 8. Sampling hole; 9. Sampling tube; 10. Sampling pump; 11. Detection assembly; 12. Electric cylinder; 13. Scraper frame; 14. Rotating shaft; 15. Brush frame; 16. Fan blade; 17. Storage box; 18. Drawer; 19. Mounting block. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 4 As shown, a tail gas denitrification detection device includes a filter box 1. A first air duct 3 is connected to the left side of the filter box 1. A filter plate 2 is slidably connected inside the filter box 1. The top of the filter plate 2 extends to the top of the filter box 1 and is fixedly connected to a handle. A filter frame 4 is connected to the left side of the first air duct 3. A filter screen 5 is fixedly connected inside the filter frame 4. The filter screen 5 is fan-shaped and is evenly distributed in a ring inside the filter frame 4. A second air duct 6 is connected to the left side of the filter frame 4. A sampling head 7 is provided inside the second air duct 6. A number of sampling holes 8 are provided on the surface of the sampling head 7 and are evenly distributed in a ring on the surface of the sampling head 7. A sampling tube 9 is connected to the left side of the sampling head 7. The end of the sampling tube 9 away from the sampling head 7 extends to the outside of the second air duct 6 and is fixedly connected to a sampling pump 10. A detection component 11 is fixedly connected to the surface of the second air duct 6 through a bracket. The outlet of the sampling pump 10 is connected to the detection component 11.

[0021] refer to Figure 2 A scraper frame 13 is slidably connected inside the filter box 1. The top of the scraper frame 13 extends to the top of the filter box 1. An electric cylinder 12 is fixedly connected to the back of the filter box 1. The output end of the electric cylinder 12 is fixedly connected to the scraper frame 13.

[0022] As a technical optimization of this utility model, by setting up the scraper frame 13 and the electric cylinder 12, the electric cylinder 12 extends or retracts, thereby driving the scraper frame 13 to move up or down. When the scraper frame 13 moves up and down, it will scrape off the impurities accumulated on the right side of the filter plate 2. The scraped impurities will fall into the storage box 17 on the right side. A sealing ring is provided between the filter box 1 and the filter plate 2 to fill the gap between the filter box 1 and the filter plate 2. The sealing ring is not shown.

[0023] refer to Figure 2 The filter frame 4 is rotatably connected to a rotating shaft 14. A brush holder 15 is fitted on the surface of the rotating shaft 14. The brush holder 15 is in contact with the filter screen 5. A fan blade 16 is fixedly connected to the right side of the rotating shaft 14.

[0024] As a technical optimization of this utility model, by setting up the rotating shaft 14, brush holder 15 and fan blade 16, when the airflow flows to the left, the airflow will drive the fan blade 16 to rotate, which in turn drives the brush holder 15 and the rotating shaft 14 to rotate. The brush holder 15 can sweep away the impurities accumulated on the right side of the filter screen 5. The swept impurities fall into the storage box 17 on the right side of the filter screen 5. In actual use, the airflow velocity is relatively large, which can drive the fan blade 16 to rotate.

[0025] refer to Figure 4 A mounting block 19 is fixedly connected to the top of the filter plate 2, and the mounting block 19 is fixedly connected to the filter box 1 by bolts.

[0026] As a technical optimization of this utility model, the filter plate 2 can be disassembled and assembled by setting the mounting block 19 and bolts, which makes it easier for the operator to replace or maintain the filter plate 2.

[0027] refer to Figure 2 The surfaces of the filter box 1 and the first air duct 3 are connected to the storage box 17. The inside of the storage box 17 is slidably connected to the drawer 18. The front of the drawer 18 extends to the front of the storage box 17 and is fixedly connected to the handle.

[0028] As a technical optimization of this utility model, through the arrangement of storage box 17 and drawer 18, the impurities cleaned from the surface of filter screen 5 and filter plate 2 fall into drawer 18 inside storage box 17. The operator can pull out drawer 18 from the front to clean the impurities inside drawer 18. A sealing gasket is provided between storage box 17 and drawer 18 to fill the gap between storage box 17 and drawer 18. The sealing gasket is not shown. The above-mentioned sealing gasket and sealing ring are common existing technologies, and will not be described in detail in this application.

[0029] refer to Figure 1 The detection component 11 includes a nitrogen oxide sensor, an oxygen sensor, and a temperature sensor.

[0030] As a technical optimization of this utility model, the detection component 11 includes a nitrogen oxide sensor, an oxygen sensor, and a temperature sensor. The nitrogen oxide sensor is a high-precision electrochemical sensor, capable of quickly and accurately detecting nitrogen oxide content. The oxygen sensor detects the oxygen content in the exhaust gas, and the temperature sensor detects the exhaust gas temperature, providing data for temperature compensation of the detection results. The detection component 11 also includes a data processing and transmission system, which includes a data processing module and a communication module. The data processing module receives the detection signal output by the detection component 11, calculates the actual nitrogen oxide content in the exhaust gas using a built-in algorithm program, and compares it with emission standards. The communication module transmits the detection results and analysis data to a remote monitoring center via wired or wireless means. A protective shell encapsulates the multiple components within the detection component 11. The protective shell is made of high-strength, high-temperature resistant material. The aforementioned detection component 11 is a common existing technology and is common knowledge to those skilled in the art, therefore, it will not be described in detail in this application.

[0031] The working principle and usage process of this utility model are as follows: When the power plant exhaust gas is emitted, the cooled exhaust gas enters the filter box 1 and undergoes first-stage filtration through the filter plate 2. Then, the exhaust gas enters the first air duct 3 and then the filter screen 5 in the filter frame 4 undergoes second-stage filtration through the filter screen 5. Finally, it enters the second air duct 6 and is transported to the next process. The diameter of the filter holes on the surface of the filter plate 2 is larger than that on the surface of the filter screen 5. The sampling head 7 has sampling holes 8 distributed in a ring on its surface. The operator starts the sampling pump 10, so that part of the exhaust gas is drawn into the detection component 11 through the sampling head 7 and the sampling tube 9, and then the exhaust gas is detected and processed. The use of the ring-distributed sampling holes 8 and the high-temperature and corrosion-resistant sampling probe improves the representativeness and reliability of the sampling, ensuring that the collected exhaust gas sample can accurately reflect the real situation of the power plant exhaust gas, thereby improving the detection accuracy. This device can be connected to the exhaust gas delivery pipeline through a flange, thereby improving the practicality of the device. At the same time, the filter box 1, the first air duct 3, the filter frame 4, and the second air duct 6 can all be disassembled individually, which facilitates the maintenance of this device.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tail gas denitrification detection device, comprising a filter box (1), characterized in that: The filter box (1) is connected to a first air duct (3) on its left side. A filter plate (2) is slidably connected inside the filter box (1). The top of the filter plate (2) extends to the top of the filter box (1) and is fixedly connected to a handle. A filter frame (4) is connected to the left side of the first air duct (3). A filter screen (5) is fixedly connected inside the filter frame (4). The filter screen (5) is fan-shaped and is evenly distributed in a ring inside the filter frame (4). A second air duct (6) is connected to the left side of the filter frame (4). The second air duct (6) is connected to the inside of the filter frame (4). A sampling head (7) is provided, and sampling holes (8) are provided on the surface of the sampling head (7). The number of sampling holes (8) is several, and the sampling holes (8) are evenly distributed in a ring on the surface of the sampling head (7). A sampling tube (9) is connected to the left side of the sampling head (7). The end of the sampling tube (9) away from the sampling head (7) extends to the outside of the second air duct (6) and is fixedly connected to a sampling pump (10). A detection component (11) is fixedly connected to the surface of the second air duct (6) through a bracket. The air outlet of the sampling pump (10) is connected to the detection component (11).

2. The exhaust gas denitrification detection device according to claim 1, characterized in that: The filter box (1) is slidably connected to a scraper frame (13), the top of which extends to the top of the filter box (1). An electric cylinder (12) is fixedly connected to the back of the filter box (1), and the output end of the electric cylinder (12) is fixedly connected to the scraper frame (13).

3. The exhaust gas denitrification detection device according to claim 1, characterized in that: The filter frame (4) is rotatably connected to a rotating shaft (14), and a brush holder (15) is fitted on the surface of the rotating shaft (14). The brush holder (15) is in contact with the filter screen (5), and a fan blade (16) is fixedly connected to the right side of the rotating shaft (14).

4. The exhaust gas denitrification detection device according to claim 1, characterized in that: The top of the filter plate (2) is fixedly connected to an installation block (19), and the installation block (19) is fixedly connected to the filter box (1) by bolts.

5. The exhaust gas denitrification detection device according to claim 1, characterized in that: The surfaces of the filter box (1) and the first air duct (3) are connected to a storage box (17). The storage box (17) is slidably connected to a drawer (18). The front of the drawer (18) extends to the front of the storage box (17) and is fixedly connected to a handle.

6. The exhaust gas denitrification detection device according to claim 1, characterized in that: The detection component (11) includes a nitrogen oxide sensor, an oxygen sensor, and a temperature sensor.

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