Power station boiler flue gas denitration device

Abstract

The utility model relates to the technical field of boiler flue gas treatment, and discloses a power station boiler flue gas denitration device which comprises supporting frames, one sides of the four supporting frames are fixedly connected with the same tank body, tank covers are arranged on the upper side and the lower side of the tank body, a demisting layer is arranged on the middle lower portion of the inner side of the tank body, and the demisting layer is arranged on the middle lower portion of the inner side of the tank body. A rotating rod is rotatably connected to the middle of the top end of the demisting layer, an impeller is fixedly connected to the outer side of the rotating rod, a plurality of stirring rods are fixedly connected to the periphery of the outer side of the rotating rod at equal intervals, a water pump is fixedly connected to the left side of the tank body, and the output end of the water pump penetrates through the tank body and communicates with a first spraying pipeline frame; the input end of the water pump communicates with a liquid inlet pipe. According to the utility model, the impeller can rotate along with the flowing-in speed of a catalyst so as to drive the stirring rod to rotate, so that flue gas in the tank body can be stirred and can fully react with the catalyst, and the flue gas denitration treatment efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas treatment, in particular to a flue gas denitration device for a power station boiler. Background Art

[0002] The power plant boiler is one of the core equipment in the power station. It is mainly used to heat water to generate steam to drive the steam turbine to generate electricity. The design and operation of the power plant boiler directly affects the power generation efficiency, environmental emissions and safe and stable operation of the power plant. Therefore, it plays a very important role in the power industry.

[0003] Power station boilers generally use coal or natural gas for combustion. The combustion of coal, natural gas and other fuels in power generation boilers produces gases that are prone to form haze and acid rain. These flue gases need to be purified by flue gas denitrification equipment before being discharged into the atmosphere to reduce pollution to the atmospheric environment.

[0004] However, most of the existing power plant boiler flue gas denitrification devices on the market only achieve denitrification by injecting catalysts into the tank to react with the flue gas. However, since there is no stirring device, the flue gas contacts the catalyst slowly, which reduces the flue gas treatment efficiency. As a result, the flue gas is not effectively treated and continues to be discharged into the atmosphere, which increases environmental pollution and fails to meet the needs of users. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a power station boiler flue gas denitrification device, aiming to improve the problem that the power station boiler flue gas denitrification device in the prior art cannot control the contact efficiency between the flue gas and the catalyst, thereby reducing the flue gas denitrification efficiency.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a power station boiler flue gas denitrification device, comprising a support frame, one side of four support frames is fixedly connected to the same tank body, the upper and lower sides of the tank body are provided with a tank cover, a demisting layer is provided at the middle and lower part of the inner side of the tank body, a rotating rod is rotatably connected to the middle part of the top of the demisting layer, an impeller is fixedly connected to the outer side of the rotating rod, a plurality of stirring rods are equidistantly fixedly connected to the outer side of the rotating rod, a water pump is fixedly connected to the left side of the tank body, the output end of the water pump passes through the tank body and is connected to a first spray pipe frame, the input end of the water pump is connected to a liquid inlet pipe, the top of the liquid inlet pipe is connected to a connecting pipe, the right end of the connecting pipe passes through the tank body and is connected to a second spray pipe frame, the outer sides of the first spray pipe frame and the connecting pipe are provided with electric valves, a plurality of through holes are equidistantly opened around the bottom of the first spray pipe frame and the second spray pipe frame, a filter plate is provided at the middle and upper part of the inner side of the tank body, and a disassembly mechanism is provided on one side of the filter plate.

[0007] As a further description of the above technical solution:

[0008] The disassembly mechanism includes connecting rods, one ends of the multiple connecting rods are respectively fixedly connected to the left and right ends of one side of the corresponding tank cover, and the other ends of the multiple connecting rods are respectively fixedly connected to the corresponding filter plates and one side of the demisting layer. Bolts are threadedly connected to the left and right sides of the lower middle part of the outer side of the tank body, and one end of the bolts penetrates the tank body and the demisting layer in turn. Holes are opened on the left and right sides of the filter plate, and a spring is fixedly connected to one side of the inner side of the hole. One end of the spring is fixedly connected to a limiting rod, and one end of the two limiting rods respectively penetrates the left and right sides of the tank body.

[0009] As a further description of the above technical solution:

[0010] The middle part of the top end of the upper tank cover is connected with an air outlet pipe, and the left end of the lower tank cover is connected with an air inlet pipe.

[0011] As a further description of the above technical solution:

[0012] A controller is fixedly connected to the middle part of the left side of the tank body, and the controller is electrically connected to the water pump and the electric valve respectively.

[0013] As a further description of the above technical solution:

[0014] A protective cover is arranged on the outer side of the controller, and one side of the protective cover is rotatably connected to the left side of the tank body.

[0015] As a further description of the above technical solution:

[0016] The middle part of the bottom end of the tank cover at the lower side is connected with a collecting pipe, and the outer side of the bottom of the collecting pipe is threadedly connected with a sealing cover.

[0017] As a further description of the above technical solution:

[0018] The sizes of the demisting layer and the filter plate are matched with the internal size of the tank body.

[0019] As a further description of the above technical solution:

[0020] An observation window is arranged in the middle of the front side of the tank body.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the external catalyst can be pumped into the first spray pipe frame by a water pump, and then the catalyst will be discharged through the through holes on the first spray pipe frame. At this time, the gas entering the tank body from the air inlet pipe will first pass through the demisting layer to leave the impurities it carries in the demisting layer. At the same time, the impeller will rotate with the speed of the catalyst flowing in, thereby driving the stirring rod to rotate, and the flue gas inside the tank body can be stirred so that it can fully react with the catalyst, thereby improving the flue gas denitrification treatment efficiency and meeting the needs of users.

[0023] 2. In the utility model, the limit rods on both sides are pressed, and the extrusion force on the spring will drive the limit rods to enter the holes. At this time, the filter plate can be removed by moving the upper tank cover upwards, and the limit fixation of the demisting layer can be released by loosening the bolts. Then, the corresponding tank cover can be moved downwards, and the internal structure of the tank body can be taken out for maintenance and cleaning. Cleaning the internal structure of the tank body is relatively simple, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a power station boiler flue gas denitrification device proposed by the utility model;

[0025] Figure 2 This is a structural cross-sectional view of a power station boiler flue gas denitration device proposed by the utility model;

[0026] Figure 3 for Figure 2 A magnified image of point A;

[0027] Figure 4 The utility model is a schematic diagram of the partial structure of a power station boiler flue gas denitrification device.

[0028] Legend:

[0029] 1. Support frame; 2. Disassembly mechanism; 201. Connecting rod; 202. Bolt; 203. Hole; 204. Spring; 205. Limit rod; 3. Tank body; 4. Tank cover; 5. Demisting layer; 6. Rotating rod; 7. Impeller; 8. Water pump; 9. Liquid inlet pipe; 10. First spray pipe frame; 11. Connecting pipe; 12. Second spray pipe frame; 13. Through hole; 14. Filter plate; 15. Electric valve; 16. Stirring rod; 17. Inlet pipe; 18. Collecting pipe; 19. Sealing cover; 20. Outlet pipe; 21. Controller; 22. Protective cover; 23. Observation window. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in 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 in 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.

[0031] Reference Figure 1 , Figure 2 and Figure 4 The utility model provides an embodiment: a power station boiler flue gas denitrification device, including a support frame 1, one side of four support frames 1 is fixedly connected to the same tank body 3, the upper and lower sides of the tank body 3 are provided with a tank cover 4, the inner middle and lower part of the tank body 3 is provided with a demisting layer 5, the top middle part of the demisting layer 5 is rotatably connected with a rotating rod 6, the outer side of the rotating rod 6 is fixedly connected with an impeller 7, the outer side of the rotating rod 6 is equidistantly fixedly connected with a plurality of stirring rods 16, the left side of the tank body 3 is fixedly connected with a water pump 8, the output end of the water pump 8 passes through the tank body 3 and is connected with a first spray pipe frame 10, the water pump The input end of 8 is connected with a liquid inlet pipe 9, the top of the liquid inlet pipe 9 is connected with a connecting pipe 11, the right end of the connecting pipe 11 passes through the tank body 3 and is connected with the second spray pipe frame 12, the outer sides of the first spray pipe frame 10 and the connecting pipe 11 are provided with electric valves 15, the bottoms of the first spray pipe frame 10 and the second spray pipe frame 12 are equidistantly provided with a plurality of through holes 13, a filter plate 14 is provided at the middle and upper part of the inner side of the tank body 3, a disassembly mechanism 2 is provided on one side of the filter plate 14, and the sizes of the demisting layer 5 and the filter plate 14 are matched with the internal size of the tank body 3;

[0032] Specifically, the catalyst from the outside can be pumped into the first spray pipe frame 10 through the water pump 8, and these catalysts can be evenly discharged through the through hole 13. At the same time, the flue gas in the tank body 3 will first pass through the carefully designed demisting layer 5. In this layer, the impurities carried by the flue gas are cleverly trapped in the demisting layer 5, thereby ensuring the purity of the flue gas. Then the pure flue gas continues to move upward and meets the catalyst. In this process, the impeller 7 plays a vital role. With the inflow of the catalyst, the impeller 7 will cleverly rotate, and this rotation action further drives the rotation of the stirring rod 16. This stirring allows the flue gas to have a more sufficient contact and reaction with the catalyst, thereby significantly improving the denitrification efficiency of the flue gas.

[0033] Reference Figure 2 and Figure 3The disassembly mechanism 2 includes a connecting rod 201, one end of each of the connecting rods 201 is fixedly connected to the left and right ends of the corresponding tank cover 4, and the other ends of each of the connecting rods 201 are fixedly connected to the corresponding filter plate 14 and one side of the demisting layer 5, respectively. Bolts 202 are threadedly connected to the left and right sides of the lower middle part of the outer side of the tank body 3, and one end of the bolt 202 passes through the tank body 3 and the demisting layer 5 in sequence. Holes 203 are provided on the left and right sides of the filter plate 14, and a spring 204 is fixedly connected to one side of the hole 203. One end of the spring 204 is fixedly connected to a limiting rod 205, and one end of the two limiting rods 205 passes through the left and right sides of the tank body 3 respectively.

[0034] Specifically, after a period of use, the device needs to be maintained and cleaned. At this time, the limit rods 205 on both sides are pressed, and the force of the spring 204 being squeezed will drive the limit rods 205 into the holes 203. This design cleverly realizes the rapid disassembly of the filter plate 14. Subsequently, the filter plate 14 can be easily removed by moving the upper tank cover 4 upwards. For further internal maintenance, the staff only needs to loosen the bolts 202 to release the limit fixation of the demisting layer 5, and then move the corresponding tank cover 4 downwards, and the demisting layer 5 can also be removed smoothly. At this time, the internal structure of the tank body 3 is completely exposed, which is convenient for the staff to carry out cleaning and maintenance work, ensuring the normal operation of the device and extending its service life.

[0035] Reference Figure 1 and Figure 2 The top middle of the upper tank cover 4 is connected with an air outlet pipe 20, the left end of the lower tank cover 4 is connected with an air inlet pipe 17, the bottom middle of the lower tank cover 4 is connected with a collecting pipe 18, and the bottom outer side of the collecting pipe 18 is threadedly connected with a sealing cover 19;

[0036] Specifically, the exhaust pipe 20 can facilitate the exhaust of the flue gas after denitration, while the intake pipe 17 can facilitate the flue gas to enter the tank body 3, and the collection pipe 18 can collect the catalyst or water flow after spraying.

[0037] Reference Figure 1 A controller 21 is fixedly connected to the middle of the left side of the tank body 3, and the controller 21 is electrically connected to the water pump 8 and the electric valve 15 respectively. A protective cover 22 is arranged on the outside of the controller 21, and one side of the protective cover 22 is rotatably connected to the left side of the tank body 3;

[0038] Specifically, the operation of the water pump 8 and the electric valve 15 can be controlled by the controller 21, and the protective cover 22 can protect the controller 21 from being damaged by external factors.

[0039] Reference Figure 1 , an observation window 23 is provided in the middle of the front side of the tank body 3;

[0040] Specifically, the observation window 23 can be used to facilitate the staff to check the internal conditions of the tank body 3 at any time, and can respond in time when encountering special situations.

[0041] Working principle: When using the device, first connect the external flue gas pipeline with the air inlet pipe 17, and then the flue gas will enter the tank body 3 through the air inlet pipe 17. At this time, open the water pump 8 and the electric valve 15 on the first spray pipe frame 10. The water pump 8 will draw the external catalyst into the first spray pipe frame 10 through the liquid inlet pipe 9, and then discharge it through the through hole 13. The flue gas entering the tank body 3 will first pass through the demisting layer 5 to leave the impurities it carries in the demisting layer 5 and then move upward. At this time, the impeller 7 will rotate with the speed of the catalyst flowing in, thereby driving the stirring rod 16 to rotate, and the flue gas inside the tank body 3 can be stirred so that it can fully react with the catalyst, thereby improving the flue gas denitrification efficiency and meeting the needs of the user. Then close the electric valve 15 on the first spray pipe frame 10, and open the valve. Open the electric valve 15 on the connecting pipe 11. At this time, the external water source can be pumped into the second spray pipe frame 12 through the water pump 8 to spray and clean the flue gas after denitrification. The cleaned flue gas will be filtered again through the filter plate 14 and then discharged through the exhaust pipe 20. After the device has been used for a period of time, press the limit rods 205 on both sides. At this time, the force of the spring 204 being squeezed will drive the limit rods 205 to enter the holes 203. At this time, the filter plate 14 can be removed by moving the upper tank cover 4 upwards, and the limit fixation of the demisting layer 5 can be released by loosening the bolts 202. Then, the corresponding tank cover 4 can be moved downward to remove it, and the internal structure of the tank body 3 can be taken out for maintenance and cleaning. Cleaning the internal structure of the tank body 3 is relatively simple, which can reduce the workload of the staff and improve the practicability of the device.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power station boiler flue gas denitrification device, comprising a support frame (1), characterized in that: One side of the four support frames (1) is fixedly connected to the same tank body (3), the upper and lower sides of the tank body (3) are both provided with a tank cover (4), a demisting layer (5) is provided at the middle and lower part of the inner side of the tank body (3), a rotating rod (6) is rotatably connected to the middle part of the top of the demisting layer (5), an impeller (7) is fixedly connected to the outer side of the rotating rod (6), a plurality of stirring rods (16) are fixedly connected to the outer side of the rotating rod (6) at equal intervals, a water pump (8) is fixedly connected to the left side of the tank body (3), an output end of the water pump (8) passes through the tank body (3) and is connected to a first spray pipe frame (10), and the water pump The input end of the tank (8) is connected to a liquid inlet pipe (9), the top of the liquid inlet pipe (9) is connected to a connecting pipe (11), the right end of the connecting pipe (11) passes through the tank body (3) and is connected to a second spray pipe frame (12), the outer sides of the first spray pipe frame (10) and the connecting pipe (11) are both provided with electric valves (15), the bottoms of the first spray pipe frame (10) and the second spray pipe frame (12) are both equidistantly provided with a plurality of through holes (13), a filter plate (14) is provided at the middle and upper part of the inner side of the tank body (3), and a disassembly mechanism (2) is provided on one side of the filter plate (14).

2. A power station boiler flue gas denitrification device according to claim 1, characterized in that: The disassembly mechanism (2) comprises a connecting rod (201), one end of each of the connecting rods (201) is fixedly connected to the left and right ends of a corresponding tank cover (4), and the other ends of each of the connecting rods (201) are fixedly connected to the corresponding filter plate (14) and one side of the demisting layer (5). Bolts (202) are threadedly connected to the left and right sides of the lower middle part of the outer side of the tank body (3), and one end of each of the bolts (202) passes through the tank body (3) and the demisting layer (5) in sequence. Holes (203) are provided on the left and right sides of the filter plate (14), and a spring (204) is fixedly connected to one side of the hole (203). One end of each of the springs (204) is fixedly connected to a limiting rod (205), and one end of each of the two limiting rods (205) passes through the left and right sides of the tank body (3).

3. A power station boiler flue gas denitrification device according to claim 1, characterized in that: The middle part of the top end of the upper tank cover (4) is connected to an air outlet pipe (20), and the left end of the lower tank cover (4) is connected to an air inlet pipe (17).

4. A power station boiler flue gas denitrification device according to claim 1, characterized in that: A controller (21) is fixedly connected to the middle portion of the left side of the tank body (3), and the controller (21) is electrically connected to the water pump (8) and the electric valve (15) respectively.

5. A power station boiler flue gas denitrification device according to claim 4, characterized in that: A protective cover (22) is arranged on the outside of the controller (21), and one side of the protective cover (22) is rotatably connected to the left side of the tank body (3).

6. A power station boiler flue gas denitrification device according to claim 1, characterized in that: The middle of the bottom end of the lower tank cover (4) is connected to a collecting pipe (18), and the outer side of the bottom of the collecting pipe (18) is threadedly connected to a sealing cover (19).

7. A power station boiler flue gas denitrification device according to claim 1, characterized in that: The sizes of the demisting layer (5) and the filter plate (14) are matched with the internal size of the tank body (3).

8. A power station boiler flue gas denitrification device according to claim 1, characterized in that: An observation window (23) is provided in the middle of the front side of the tank body (3).

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