Power station boiler flue gas sampling device

Abstract

The utility model discloses a power station boiler flue gas sampling device, which relates to the technical field of sampling devices and comprises a flue gas sampling shell, an air pump is mounted on the outer wall of the flue gas sampling shell, a sampling pipe is mounted at the air inlet end of the air pump, an air outlet pipe is mounted at the air outlet end of the air pump, and the air outlet pipe is communicated into the flue gas sampling shell. An analysis instrument is mounted on one side of the inner wall of the flue gas sampling shell; a filtering mechanism is arranged on the outer wall of the sampling pipe; a cooling mechanism is arranged on the outer wall of the air outlet pipe. According to the utility model, the filter mechanism is mounted, so that particles in flue gas can be filtered by using the filter screen, and when the particles adsorbed by the filter screen need to be cleaned, the filter frame can be cleaned after being detached, so that the particles in the flue gas can be conveniently and continuously filtered; dust is prevented from entering the flue gas sampling shell and being adsorbed on an analytical instrument, and meanwhile, the accuracy of a measurement result is improved; the cooling mechanism is mounted to cool the flue gas, so that the analysis instrument is prevented from being damaged due to over-high temperature of the flue gas.

Description

Technical Field

[0001] The present application relates to the technical field of sampling devices, and in particular to a flue gas sampling device for a power station boiler. Background Art

[0002] The power plant boiler flue gas sampling device is a device specially used for sampling the flue gas of power plant boilers. It is an important part of the power plant environmental monitoring system. It is mainly used to achieve accurate and reliable sampling of flue gas samples emitted by the boiler for subsequent pollutant concentration analysis and treatment effect evaluation. It generally extracts the flue gas sample from the flue through a sampling probe and transmits it to the analytical instrument through a sampling tube to detect its concentration.

[0003] Patent document CN213985877U discloses a flue gas sampling device for boiler energy efficiency testing, which discloses that "it includes a box body, an operation panel is provided on the upper part of the side wall of the box body, a flue gas analyzer is provided on the inner bottom wall of the box body, a first through-tube is provided through the top of the flue gas analyzer, one end of the first through-tube is fixedly connected to a chamber, one end of the first through-tube is fixedly connected to a fourth through-tube inside the chamber, a row of baffles is fixedly connected to the inner side wall of the fourth through-tube, an air cooler is fixedly connected to the upper part of the inner side wall of the chamber, one end of the fourth through-tube is fixedly connected to the outside of the chamber with a second through-tube, one end of the second through-tube is fixedly connected to a third through-tube, and one end of the third through-tube is fixedly and slidably connected to a sleeve on the outside of the box body. In the utility model, sampling can be performed at different points in the boiler, which ensures the accuracy of the data and can effectively protect the instrument."

[0004] However, the boiler energy efficiency test flue gas sampling device in the above-mentioned public document mainly considers the ability to sample different points in the boiler, ensures data accuracy, and can effectively protect the instrument, but does not consider the inconvenience of filtering larger particles in the flue gas, preventing impurities from being adsorbed into the interior of the analytical instrument, and removing impurities at the same time to improve the accuracy of the measurement results. In the existing technology, because the flue gas will carry particulate dust, the particulate dust will enter the flue gas sampling shell during the circulation of the flue gas and be adsorbed on the analytical instrument, and a large amount of particulate dust will affect the accuracy of the measurement results.

[0005] In view of this, it is necessary to develop a filtering mechanism that can filter larger particles in the flue gas to prevent impurities from being adsorbed into the interior of the analytical instrument. At the same time, removing impurities can improve the accuracy of measurement results. Summary of the Invention

[0006] In response to the above problems, the present application provides a power station boiler flue gas sampling device, which enables the power station boiler flue gas sampling device to have a flue gas filtering function.

[0007] To achieve the purpose of this application, this application provides the following technical solutions:

[0008] A power station boiler flue gas sampling device comprises: a flue gas sampling shell, an outer wall of the flue gas sampling shell is installed with an air pump, an air inlet end of the air pump is installed with a sampling tube, and an air outlet end of the air pump is installed with an air outlet pipe, the air outlet pipe leads to the interior of the flue gas sampling shell, and an analytical instrument is installed on one side of the inner wall of the flue gas sampling shell;

[0009] The outer wall of the sampling tube is provided with a filter mechanism, and the filter mechanism includes a mounting plate, the mounting plate is provided on the outer wall of the sampling tube, the inner wall of the mounting plate is provided with a splicing groove, a disassembly stud is provided through the splicing groove, and a disassembly nut is installed around the outer wall of the disassembly stud;

[0010] A filter frame is installed on one side wall of the installation plate away from the disassembly nut. The outer wall of the filter frame is close to the disassembly stud, and a filter screen is installed on the inner wall. A cleaning groove is provided on the top and a discharge groove is provided on the bottom. The inner walls of the cleaning groove and the discharge groove are installed with sealing plugs.

[0011] In a possible implementation, the filter mechanism further includes a cleaning rod, an outer wall of the cleaning rod is mounted with a cleaning scraper, and the cleaning rod and the cleaning scraper are used to clean the filter screen through the cleaning groove.

[0012] In a possible implementation, a cooling mechanism is provided on the outer wall of the air outlet pipe. The cooling mechanism includes a cooling rack. The cooling rack is provided at the end of the air outlet pipe, and a cooling bag is installed on the inner wall.

[0013] In a possible implementation, the cooling mechanism further includes a cooling water tank and a cooling water pump. The cooling water tank is installed at a corner of the inner wall of the smoke sampling shell, and the cooling water pump is installed at the bottom of the smoke sampling shell.

[0014] In a possible implementation, the water inlet of the cooling water pump extends to the interior of the cooling water tank, and the water outlet is installed with a water supply pipe, one end of which extends to the interior of the cooling bag.

[0015] In a possible implementation, a circulation tube is connected to a side of the cooling bag away from the water supply tube.

[0016] In a possible implementation, the other end of the flow tube leads into a flow box.

[0017] In a possible implementation, a positioning magnetic block is embedded in the bottom of the smoke sampling shell, and an adsorption magnetic block is adsorbed on the top of the positioning magnetic block.

[0018] In a possible implementation, the adsorption magnetic block is fixedly installed on the bottom of the flow box.

[0019] In a possible implementation, an operating door panel is installed on the outer wall of the smoke sampling shell, and an exhaust pipe is provided on the top.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The utility model is equipped with a filter mechanism, which can filter larger particles in the flue gas, prevent impurities from being adsorbed into the interior of the analytical instrument, and facilitate the removal of impurities. When it is necessary to clean the particles adsorbed by the filter, the filter frame can be disassembled and cleaned, thereby facilitating the filter mechanism to continuously filter the particles in the flue gas, preventing dust from entering the flue gas sampling shell and being adsorbed on the analytical instrument, thereby improving the accuracy of the measurement results;

[0022] 2. The utility model is equipped with a cooling mechanism to cool the flue gas, thereby avoiding damage to the analytical instrument due to excessively high flue gas temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application.

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the filter frame of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the cleaning scraper block of the utility model.

[0028] In the figure: 1. Flue gas sampling shell; 2. Operating door panel; 3. Vacuum pump; 4. Sampling tube; 5. Analytical instrument; 6. Exhaust pipe; 7. Exhaust pipe; 8. Mounting plate; 9. Filter frame; 10. Filter screen; 11. Disassembly and assembly studs; 12. Splicing groove; 13. Disassembly and assembly nuts; 14. Cleaning groove; 15. Discharge chute; 16. Sealing plug; 17. Cleaning rod; 18. Cleaning scraper; 19. Cooling rack; 20. Cooling bag; 21. Cooling water tank; 22. Cooling water pump; 23. Water supply pipe; 24. Circulation pipe; 25. Circulation box; 26. Positioning magnet; 27. Adsorption magnet. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features indicated. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; and in the description of this application, unless otherwise specified, "plurality" means two or more.

[0031] Example 1

[0032] See Figure 1-4 The embodiment of the present application provides a power plant boiler flue gas sampling device, comprising: a flue gas sampling shell 1, an operating door panel 2 and an air pump 3 are installed on the outer wall of the flue gas sampling shell 1, a sampling tube 4 is installed at the air inlet end of the air pump 3, and an air outlet pipe 7 is installed at the air outlet end, the air outlet pipe 7 leads to the interior of the flue gas sampling shell 1, an exhaust pipe 6 is provided on the top of the flue gas sampling shell 1, and an analysis instrument 5 is installed on one side of the inner wall of the flue gas sampling shell 1.

[0033] In one possible embodiment, a filter mechanism is provided on the outer wall of the sampling tube 4. The filter mechanism includes a mounting plate 8. The mounting plate 8 is provided on the outer wall of the sampling tube 4. The inner wall of the mounting plate 8 is provided with a splicing groove 12. A disassembly stud 11 is provided through the splicing groove 12. A disassembly nut 13 is installed around the outer wall of the disassembly stud 11.

[0034] A filter frame 9 is installed on one side of the installation plate 8 away from the disassembly nut 13. The outer wall of the filter frame 9 is in close contact with the disassembly stud 11. A filter screen 10 is installed on the inner wall. A cleaning groove 14 is provided on the top and a discharge groove 15 is provided on the bottom. Sealing plugs 16 are installed on the inner walls of the cleaning groove 14 and the discharge groove 15.

[0035] The filter mechanism also includes a cleaning rod 17, the outer wall of the cleaning rod 17 is installed with a cleaning scraper 18, and the cleaning rod 17 and the cleaning scraper 18 can clean the filter screen 10 through the cleaning groove 14;

[0036] Specifically, the filtering mechanism is used to filter larger particles in the flue gas to prevent impurities from being adsorbed into the interior of the analysis instrument 5, while removing impurities and improving the accuracy of the measurement results.

[0037] In a possible embodiment, a cooling mechanism is provided on the outer wall of the outlet pipe 7, and the cooling mechanism includes a cooling rack 19, which is provided at the end of the outlet pipe 7, and a cooling bag 20 is installed on the inner wall of the cooling rack 19;

[0038] The cooling mechanism also includes a cooling water tank 21, which is installed at a corner of the inner wall of the smoke sampling shell 1. A cooling water pump 22 is also installed at the bottom of the smoke sampling shell 1, and the water inlet end of the cooling water pump 22 extends to the interior of the cooling water tank 21. A water supply pipe 23 is installed at the water outlet end of the cooling water pump 22, and one end of the water supply pipe 23 extends to the interior of the cooling bag 20.

[0039] The cooling bag 20 is connected to one end of the flow pipe 24 on the side away from the water supply pipe 23;

[0040] Specifically, the cooling mechanism is used to cool the gas to avoid damage to the analysis instrument 5 due to excessive gas temperature.

[0041] In a possible embodiment, the other end of the flow tube 24 leads into the flow box 25 .

[0042] In a possible embodiment, a positioning magnetic block 26 is embedded in the bottom of the smoke sampling shell 1 , an adsorption magnetic block 27 is adsorbed above the positioning magnetic block 26 , and the adsorption magnetic block 27 is fixedly installed on the bottom of the flow box 25 .

[0043] Here's how this application works:

[0044] In order to prevent particulate dust in the flue gas from entering the flue gas sampling shell 1 and being adsorbed in the analytical instrument 5, the exhaust pump sucks the flue gas from the power station boiler flue gas pipe into the sampling tube 4 when working, and discharges it into the flue gas sampling shell 1 through the outlet pipe 7. The analytical instrument 5 detects the flue gas concentration and then discharges the flue gas through the exhaust pipe 6.

[0045] The filter frame 9 is first moved to the outside of the installation and disassembly plate 8, and then the disassembly stud 11 is passed through the interior of the splicing groove 12, and the disassembly nut 13 is installed on the outside of the disassembly stud 11, and the filter frame 9 is installed. The filter screen 10 is used to filter the particles in the flue gas, and the cleaning groove 14 and the discharge groove 15 are sealed by the sealing plug 16; when the particles adsorbed by the filter screen 10 need to be cleaned, the filter frame 9 can be disassembled and cleaned, and the sealing plug 16 can also be removed. The cleaning rod 17 and the cleaning scraper 18 are moved from the cleaning groove 14 to one side of the filter screen 10, and the cleaning rod 17 is dragged to drive the cleaning scraper 18 to move to scrape and clean one side of the filter screen 10, and the discharge groove 15 discharges the scraped material, thereby facilitating the filtration of the particles in the flue gas, preventing dust from entering the flue gas sampling shell 1 and being adsorbed in the analyzer 5, and improving the accuracy of the measurement results.

[0046] In order to avoid the situation where the flue gas temperature is high and the analytical instrument 5 is damaged, the operating door panel 2 is first opened, and water is added to the cooling water tank 21. Then the cooling water pump 22 transports the water to the cooling bag 20 through the water supply pipe 23. When the flue gas passes through the cooling rack 19, the flow of water inside the cooling bag 20 causes the flue gas to be cooled. Then the circulation pipe 24 can transport the heat-exchanged water to the circulation box 25, and by pulling the circulation box 25 to remove the adsorption magnetic block 27 from the positioning magnetic block 26, the circulation box 25 can be disassembled, which is convenient for taking out and discharging the heat-exchanged water, thereby continuously cooling the flue gas temperature.

[0047] The above embodiments are intended only to illustrate the technical solutions of the present application and are not intended to limit them. The present application is not limited to the precise structures described above and illustrated in the accompanying drawings, and it cannot be assumed that the specific implementation of the present application is limited to these descriptions. For those skilled in the art of the present application, any changes and modifications made without departing from the concept of the present application should be deemed to fall within the scope of protection of the present application.

Claims

1. A power station boiler flue gas sampling device, characterized in that: include: A flue gas sampling shell (1), wherein an air pump (3) is installed on the outer wall of the flue gas sampling shell (1), a sampling tube (4) is installed at the air inlet end of the air pump (3), and an air outlet pipe (7) is installed at the air outlet end, the air outlet pipe (7) leads to the interior of the flue gas sampling shell (1), and an analysis instrument (5) is installed on one side of the inner wall of the flue gas sampling shell (1); The outer wall of the sampling tube (4) is provided with a filter mechanism, and the filter mechanism includes a mounting plate (8), the mounting plate (8) is arranged on the outer wall of the sampling tube (4), the inner wall of the mounting plate (8) is provided with a splicing groove (12), a disassembly stud (11) is provided through the splicing groove (12), and a disassembly nut (13) is installed around the outer wall of the disassembly stud (11); A filter frame (9) is installed on one side wall of the installation plate (8) away from the disassembly nut (13), the outer wall of the filter frame (9) is in close contact with the disassembly stud (11), a filter screen (10) is installed on the inner wall, a cleaning groove (14) is provided on the top, and a discharge groove (15) is provided on the bottom, and sealing plugs (16) are installed on the inner walls of the cleaning groove (14) and the discharge groove (15).

2. The power plant boiler flue gas sampling device according to claim 1, characterized in that: The filtering mechanism further comprises a cleaning rod (17), the outer wall of which is mounted a cleaning scraper (18), and the cleaning rod (17) and the cleaning scraper (18) are used to clean the filter screen (10) through the cleaning groove (14).

3. The power plant boiler flue gas sampling device according to claim 1, characterized in that: The outer wall of the air outlet pipe (7) is provided with a cooling mechanism, and the cooling mechanism includes a cooling frame (19). The cooling frame (19) is arranged at the end of the air outlet pipe (7), and a cooling bag (20) is installed on the inner wall.

4. The power plant boiler flue gas sampling device according to claim 3, characterized in that: The cooling mechanism further comprises a cooling water tank (21) and a cooling water pump (22); the cooling water tank (21) is installed at a corner of the inner wall of the smoke sampling shell (1); and the cooling water pump (22) is installed at the bottom of the smoke sampling shell (1).

5. The power plant boiler flue gas sampling device according to claim 4, characterized in that: The water inlet end of the cooling water pump (22) extends to the interior of the cooling water tank (21), and the water outlet end is provided with a water supply pipe (23), one end of which extends to the interior of the cooling bag (20).

6. The power station boiler flue gas sampling device according to claim 5, characterized in that: A circulation pipe (24) is connected to the side of the cooling bag (20) away from the water supply pipe (23).

7. The power plant boiler flue gas sampling device according to claim 6, characterized in that: The other end of the circulation tube (24) leads to the circulation box (25).

8. The power station boiler flue gas sampling device according to claim 1, characterized in that: A positioning magnetic block (26) is embedded in the bottom of the smoke sampling shell (1), and an adsorption magnetic block (27) is adsorbed above the positioning magnetic block (26).

9. The power plant boiler flue gas sampling device according to claim 8, characterized in that: The adsorption magnetic block (27) is fixedly mounted on the bottom of the flow box (25).

10. The power plant boiler flue gas sampling device according to claim 1, characterized in that: An operating door panel (2) is installed on the outer wall of the smoke sampling housing (1), and an exhaust pipe (6) is provided on the top.

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