Denitration inlet NOX sampling and analyzing device

Abstract

The utility model relates to the technical field of flue gas sampling analysis, and discloses a denitration inlet NOX sampling analysis device which comprises a gas inlet pipe, two groups of second sampling pipes are arranged on the gas inlet pipe, and first sampling pipes are fixedly communicated with the second sampling pipes. When the blades rotate, a first bevel gear drives a first reciprocating screw rod to rotate through a second bevel gear, then a third bevel gear drives a second reciprocating screw rod to rotate through a fourth bevel gear, and due to the fact that spiral sliding openings are formed in the first reciprocating screw rod and the second reciprocating screw rod, a rotating lantern ring slides along the spiral sliding openings; at the moment, the cleaning annular plate is in contact with the inner wall of the second sampling pipe and the inner wall of the first sampling pipe while sliding, so that the effect of automatically hanging the inner wall of the sampling pipeline and then cleaning the pipeline is achieved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas sampling and analysis technology, and more specifically, to a NOx sampling and analysis device for denitrification inlet. Background Technology

[0002] Combined cycle gas turbine power generation is a highly efficient and clean power generation technology that has been widely used in China's power industry. With the continuous advancement of power industry technology and the deepening of people's understanding of environmental protection, achieving ultra-low emissions of harmful gases in power plant flue gas has become an important task for the power industry. Currently, the denitrification technology routes for gas turbine waste heat boilers include the use of low-NOx combustion technology and SCR denitrification technology. Among them, SCR denitrification technology, namely selective catalytic reduction denitrification technology, mainly utilizes the reduction characteristics of NH3 on NOx to reduce NOx into nitrogen (N2) and water (H2O) that are harmless to the environment under the action of a catalyst.

[0003] However, in practical applications, due to the high dust concentration in NOx, the dust and particulate matter mixed inside the sample can affect the analysis results during sampling and analysis. Furthermore, during the sampling process, dust and particulate matter can adhere to the inner wall of the sampling device, affecting the representativeness of the sample. Moreover, long-term dust accumulation can cause blockage of the pipeline, affecting the working efficiency of the device. In order to solve the problem of dust and particulate matter adhering to the inner wall of the pipeline and affecting the use of the device, we propose a denitrification inlet NOx sampling and analysis device. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a denitrification inlet NOx sampling and analysis device, which has the advantage of automatically cleaning the inner wall of the sampling pipe.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a NOx sampling and analysis device for denitrification inlets, comprising:

[0006] An air inlet tube is provided with two sets of second sampling tubes, and a first sampling tube is fixedly connected to the second sampling tube. The first sampling tube is fixedly inserted into the air inlet tube.

[0007] A cleaning mechanism is disposed inside the second sampling tube;

[0008] A filtration mechanism is provided on the air inlet pipe;

[0009] The cleaning mechanism includes blades, the central axis of which is rotatably inserted through the bottom of a first sampling tube. A first bevel gear is fixedly connected to one end of the central axis of the blades. A second bevel gear is meshed with the first bevel gear. A first reciprocating screw is fixedly connected to the second bevel gear. The first reciprocating screw is rotatably inserted through the second sampling tube. A third bevel gear is fixedly sleeved on the top end of the first reciprocating screw. A fourth bevel gear is meshed with the third bevel gear. A second reciprocating screw is fixedly connected to the fourth bevel gear. One end of the second reciprocating screw is rotatably connected to the inner wall of the second sampling tube. Rotating collars are slidably sleeved on both the second and first reciprocating screws. Cleaning ring plates are slidably connected to the inner walls of the second and first sampling tubes. An annular groove is formed inside the cleaning ring plate, and the rotating collar is slidably connected to the annular groove.

[0010] As a preferred embodiment of this utility model, a slag discharge pipe is fixedly connected to the second sampling tube, and an electronic valve is installed on the slag discharge pipe.

[0011] As a preferred technical solution of this utility model, the outer surfaces of the first reciprocating screw and the second reciprocating screw are each provided with two helical sliding mouths with opposite directions, the intersection of the two helical sliding mouths is connected, and the ends of the two helical sliding mouths are connected to each other.

[0012] As a preferred embodiment of this utility model, a limiting groove is provided on the inner wall of both the second sampling tube and the first sampling tube, and the surface of the cleaning ring plate is slidably connected to the inner wall of the limiting groove.

[0013] As a preferred embodiment of this utility model, a gas supply pipe is fixedly connected to the second sampling tube, and an air inlet pipe is connected to the gas supply pipe. Both the gas supply pipe and the air inlet pipe are equipped with electronic valves.

[0014] As a preferred technical solution of this utility model, the exhaust end of the gas supply pipe is fixedly connected to a filter chamber, and a number of extraction slots are installed inside the filter chamber. A filter plate is slidably connected inside the extraction slot, and a sliding groove is opened on one side of the filter plate. A baffle is slidably connected inside the sliding groove.

[0015] As a preferred technical solution of this utility model, the extraction slot and the baffle are provided with an opening, and a fixing component is provided inside the opening. The extraction slot and the baffle are fixed by the fixing component.

[0016] As a preferred embodiment of this utility model, the fixing component includes a sleeve rod, a square rod is slidably connected inside the sleeve rod, a rotating screw is rotatably connected to one side of the square rod, the rotating screw is threadedly sleeved with one side of the sleeve rod, a first hinge rod is hinged on the square rod, a second hinge rod is hinged to one end of the first hinge rod, and one end of the second hinge rod is hinged to the surface of the sleeve rod.

[0017] As a preferred embodiment of this utility model, a knob is fixedly connected to one end of the rotating screw, and the knob is provided with anti-slip texture.

[0018] As a preferred embodiment of this utility model, the bottom of the filter chamber is connected to an exhaust pipe, and one end of the exhaust pipe is connected to a detector.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model, by setting up blades, a first reciprocating screw, a cleaning ring plate, and a rotating collar, allows the first bevel gear to drive the first reciprocating screw to rotate via the second bevel gear when the blades rotate. Subsequently, the third bevel gear drives the second reciprocating screw to rotate via the fourth bevel gear. Since both the first and second reciprocating screws are provided with helical sliding ports, the rotating collar will slide along the helical sliding ports, thereby driving the cleaning ring plate to slide along the limiting groove. At this time, the cleaning ring plate will contact the inner walls of the second and first sampling tubes while sliding, thereby achieving the effect of automatically cleaning the inner walls of the sampling pipes.

[0021] 2. This utility model, by setting a rotating screw, a sleeve rod, a second hinge rod, and a first hinge rod, when the rotating screw rotates, it will drive the sleeve rod to slide along the square rod. At the same time, the sleeve rod will drive the second hinge rod to rotate around the hinge point with the sleeve rod, and then drive the first hinge rod to rotate around the hinge point with the square rod. At this time, the first and second hinge rods will gradually flatten during the rotation, thereby releasing the locking and fixing of the filter plate. At this time, the baffle can drive the filter plate to be pulled out from the inside of the extraction groove, thereby achieving the effect of convenient filter element replacement and disassembly. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the cleaning mechanism structure of this utility model;

[0024] Figure 3 This is a cross-sectional view of the cleaning mechanism of this utility model;

[0025] Figure 4This is a schematic diagram of the filter mechanism structure of this utility model;

[0026] Figure 5 This is an exploded view of the filtration mechanism of this utility model;

[0027] Figure 6 This is a cross-sectional view of the fixing component of this utility model;

[0028] In the diagram: 1. Inlet pipe; 2. Second sampling pipe; 3. First sampling pipe; 4. Slag discharge pipe; 5. Exhaust pipe; 6. First reciprocating screw; 7. Blade; 8. First bevel gear; 9. Second bevel gear; 10. Third bevel gear; 11. Fourth bevel gear; 12. Second reciprocating screw; 13. Cleaning ring plate; 14. Limiting groove; 15. Gas delivery pipe; 16. Rotating collar; 17. Inlet pipe; 18. Electronic valve; 19. Filter chamber; 20. Extraction groove; 21. Filter plate; 22. Baffle; 23. Detector; 24. Port; 25. Square rod; 26. Sleeve rod; 27. Rotating screw; 28. First hinge rod; 29. ​​Second hinge rod; 30. Knob. Detailed Implementation

[0029] 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.

[0030] like Figures 1 to 6 As shown, this utility model provides a NOx sampling and analysis device for denitrification inlets, comprising:

[0031] The air inlet pipe 1 is provided with two sets of second sampling pipes 2. The first sampling pipe 3 is fixedly connected to the second sampling pipe 2. The first sampling pipe 3 is fixedly inserted into the air inlet pipe 1.

[0032] The cleaning mechanism is located inside the second sampling tube 2;

[0033] A filter mechanism is installed on the air inlet pipe 1;

[0034] The cleaning mechanism includes a blade 7, the central axis of which is rotatably inserted through the bottom of the first sampling tube 3. A first bevel gear 8 is fixedly connected to one end of the central axis of the blade 7. A second bevel gear 9 is meshed with the first bevel gear 8. A first reciprocating screw 6 is fixedly connected to the second bevel gear 9. The first reciprocating screw 6 is rotatably inserted through the second sampling tube 2. A third bevel gear 10 is fixedly sleeved at the top of the first reciprocating screw 6. A fourth bevel gear 11 is meshed with the third bevel gear 10. A second reciprocating screw 12 is fixedly connected to the fourth bevel gear 11. One end of the second reciprocating screw 12 is rotatably connected to the inner wall of the second sampling tube 2. Rotating collars 16 are slidably sleeved on both the second reciprocating screw 12 and the first reciprocating screw 6. A cleaning ring plate 13 is slidably connected to the inner walls of the second sampling tube 2 and the first sampling tube 3. An annular groove is opened inside the cleaning ring plate 13. The rotating collar 16 is slidably connected to the annular groove.

[0035] As the flue gas inside the intake pipe 1 flows, it drives the blade 7 to rotate, which in turn drives the second bevel gear 9 to rotate via the first bevel gear 8. At this time, the first reciprocating screw 6 drives the fourth bevel gear 11 to rotate via the third bevel gear 10, which in turn drives the second reciprocating screw 12 to rotate. The first reciprocating screw 6 and the second reciprocating screw 12 drive the rotating collar 16 to rotate and move simultaneously, thereby causing the cleaning ring plate 13 to slide along the inner wall of the second sampling tube 2 and the first sampling tube 3, thereby scraping away impurities on the inner wall of the second sampling tube 2 and the first sampling tube 3.

[0036] The second sampling tube 2 is fixedly connected to the slag discharge pipe 4, and an electronic valve is installed on the slag discharge pipe 4.

[0037] Due to the installation of the slag discharge pipe 4, the impurities scraped from the inside of the second sampling pipe 2 will be discharged into the inside of the air inlet pipe 1 through the slag discharge pipe 4.

[0038] The outer surfaces of the first reciprocating screw 6 and the second reciprocating screw 12 are each provided with two helical sliding mouths in opposite directions. The intersection of the two helical sliding mouths is connected, and the ends of the two helical sliding mouths are connected to each other.

[0039] Due to the arrangement of the first reciprocating screw 6 and the second reciprocating screw 12, the cleaning ring plate 13 can reciprocate through the spiral sliding openings on the surfaces of the first reciprocating screw 6 and the second reciprocating screw 12.

[0040] In this design, both the second sampling tube 2 and the first sampling tube 3 have a limiting groove 14 on their inner walls, and the surface of the cleaning ring plate 13 is slidably connected to the inner wall of the limiting groove 14.

[0041] The limiting groove 14 limits the movement trajectory of the cleaning ring plate 13.

[0042] Among them, the second sampling tube 2 is fixedly connected to the gas supply pipe 15, the gas supply pipe 15 is connected to the gas inlet pipe 17, and both the gas supply pipe 15 and the gas inlet pipe 17 are equipped with electronic valves 18.

[0043] When the electronic valve 18 on the intake pipe 17 is closed, the flue gas will enter the interior of the gas delivery pipe 15. When the electronic valve 18 on the gas delivery pipe 15 is closed, the intake pipe 17 will draw in external air to enter the interior of the second sampling pipe 2 and the first sampling pipe 3, thereby discharging the flue gas inside the second sampling pipe 2 and the first sampling pipe 3.

[0044] Among them, the exhaust end of the gas supply pipe 15 is fixedly connected to the filter chamber 19. Several sets of extraction slots 20 are installed inside the filter chamber 19. Filter plates 21 are slidably connected inside the extraction slots 20. A sliding groove is opened on one side of the filter plate 21. A baffle 22 is slidably connected inside the sliding groove.

[0045] The sliding groove design allows for easy and direct replacement of the filter plate 21.

[0046] The extraction slot 20 and the baffle 22 are provided with openings 24, and a fixing component is provided inside the opening 24. The extraction slot 20 and the baffle 22 are fixed by the fixing component.

[0047] The fixed components facilitate the disassembly and fixing of the baffle 22.

[0048] The fixing component includes a sleeve rod 26, a square rod 25 is slidably connected inside the sleeve rod 26, a rotating screw 27 is rotatably connected to one side of the square rod 25, the rotating screw 27 is threadedly sleeved with one side of the sleeve rod 26, a first hinge rod 28 is hinged on the square rod 25, a second hinge rod 29 is hinged to one end of the first hinge rod 28, and one end of the second hinge rod 29 is hinged to the surface of the sleeve rod 26.

[0049] When the rotating screw 27 rotates, it will drive the sleeve 26 to move along the square rod 25. At this time, the second hinge rod 29 will drive the first hinge rod 28 to rotate around the hinge point with the square rod 25 during the rotation. When the hinge point between the second hinge rod 29 and the first hinge rod 28 moves to the top, the extraction slot 20 and the baffle 22 will be locked and fixed through the through port 24.

[0050] One end of the rotating screw 27 is fixedly connected to a knob 30, and the knob 30 is provided with anti-slip texture.

[0051] The knob 30 makes it easy to rotate the screw 27.

[0052] The bottom of the filter chamber 19 is connected to an exhaust pipe 5, and one end of the exhaust pipe 5 is connected to a detector 23.

[0053] Thanks to the detector 23, the exhaust gas emitted from the exhaust pipe 5 can be detected.

[0054] Working principle and usage process of this utility model:

[0055] When the flue gas flows through the inlet pipe 1, it will drive the blade 7 to rotate, which in turn drives the second bevel gear 9 to rotate through the first bevel gear 8. At this time, the first reciprocating screw 6 will drive the third bevel gear 10 to rotate, which in turn drives the second reciprocating screw 12 to rotate through the fourth bevel gear 11. Since both the first reciprocating screw 6 and the second reciprocating screw 12 are provided with spiral sliding mouths, the rotating collar 16 will slide along the spiral sliding mouths, which will drive the cleaning ring plate 13 to slide along the limiting groove 14. At this time, the cleaning ring plate 13 will contact the inner wall of the second sampling pipe 2 and the first sampling pipe 3 while sliding, thereby achieving the effect of automatically cleaning the inner wall of the sampling pipe.

[0056] When the filter element inside the filter chamber 19 needs to be replaced, rotate the knob 30. During this rotation, the rotating screw 27 will drive the sleeve 26 to slide along the surface of the square rod 25. At the same time, the sleeve 26 will drive the second hinge rod 29 to rotate around the hinge point with the sleeve 26, which in turn will drive the first hinge rod 28 to rotate around the hinge point with the square rod 25. During this rotation, the first hinge rod 28 and the second hinge rod 29 will gradually flatten, thereby releasing the locking and fixing of the filter plate 21. At this time, the baffle 22 will be able to pull the filter plate 21 out from the inside of the extraction slot 20, thus achieving the effect of convenient filter element replacement and disassembly.

[0057] 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.

[0058] 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 NOx sampling and analysis device for denitrification inlets, characterized in that, Including: An air inlet tube (1) is provided with two sets of second sampling tubes (2), and a first sampling tube (3) is fixedly connected to the second sampling tube (2). The first sampling tube (3) is fixedly inserted through the air inlet tube (1). A cleaning mechanism is disposed inside the second sampling tube (2); A filter mechanism is provided on the air inlet pipe (1); The cleaning mechanism includes a blade (7), the central axis of which is rotatably inserted through the bottom of the first sampling tube (3). A first bevel gear (8) is fixedly connected to one end of the central axis of the blade (7). A second bevel gear (9) meshes with the first bevel gear (8). A first reciprocating screw (6) is fixedly connected to the second bevel gear (9). The first reciprocating screw (6) rotatably inserts through the second sampling tube (2). A third bevel gear (10) is fixedly sleeved at the top of the first reciprocating screw (6). 0) A fourth bevel gear (11) is meshed with the upper part, and a second reciprocating screw (12) is fixedly connected to the fourth bevel gear (11). One end of the second reciprocating screw (12) is rotatably connected to the inner wall of the second sampling tube (2). A rotating collar (16) is slidably sleeved on both the second reciprocating screw (12) and the first reciprocating screw (6). A cleaning ring plate (13) is slidably connected to the inner wall of the second sampling tube (2) and the first sampling tube (3). An annular groove is opened inside the cleaning ring plate (13), and the rotating collar (16) is slidably connected to the annular groove.

2. The NOx sampling and analysis device for denitrification inlet according to claim 1, characterized in that: The second sampling tube (2) is fixedly connected to a slag discharge pipe (4), and an electronic valve is installed on the slag discharge pipe (4).

3. The NOx sampling and analysis device for denitrification inlet according to claim 1, characterized in that: The outer surfaces of the first reciprocating screw (6) and the second reciprocating screw (12) are provided with two helical sliding mouths with opposite directions. The intersection of the two helical sliding mouths is connected, and the ends of the two helical sliding mouths are connected to each other.

4. The NOx sampling and analysis device for denitrification inlet according to claim 1, characterized in that: The inner walls of the second sampling tube (2) and the first sampling tube (3) are provided with limiting grooves (14), and the surface of the cleaning ring plate (13) is slidably connected to the inner wall of the limiting groove (14).

5. The NOx sampling and analysis device for denitrification inlet according to claim 1, characterized in that: The second sampling tube (2) is fixedly connected to a gas supply pipe (15), and the gas supply pipe (15) is connected to an air inlet pipe (17). Both the gas supply pipe (15) and the air inlet pipe (17) are equipped with electronic valves (18).

6. The NOx sampling and analysis device for denitrification inlet according to claim 5, characterized in that: The exhaust end of the gas supply pipe (15) is fixedly connected to a filter chamber (19). Several sets of extraction slots (20) are installed inside the filter chamber (19). A filter plate (21) is slidably connected inside the extraction slot (20). A sliding groove is opened on one side of the filter plate (21). A baffle (22) is slidably connected inside the sliding groove.

7. The NOx sampling and analysis device for denitrification inlet according to claim 6, characterized in that: The extraction slot (20) and the baffle (22) are provided with an opening (24), and a fixing component is provided inside the opening (24). The extraction slot (20) and the baffle (22) are fixed by the fixing component.

8. The NOx sampling and analysis device for denitrification inlet according to claim 7, characterized in that: The fixing component includes a sleeve rod (26), a square rod (25) is slidably connected inside the sleeve rod (26), a rotating screw (27) is rotatably connected to one side of the square rod (25), the rotating screw (27) is threadedly sleeved with one side of the sleeve rod (26), a first hinge rod (28) is hinged on the square rod (25), a second hinge rod (29) is hinged to one end of the first hinge rod (28), and one end of the second hinge rod (29) is hinged to the surface of the sleeve rod (26).

9. The NOx sampling and analysis device for denitrification inlet according to claim 8, characterized in that: A knob (30) is fixedly connected to one end of the rotating screw (27), and the knob (30) is provided with anti-slip texture.

10. The NOx sampling and analysis device for denitrification inlet according to claim 6, characterized in that: The bottom of the filter chamber (19) is connected to an exhaust pipe (5), and one end of the exhaust pipe (5) is connected to a detector (23).

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