Flue gas low-temperature denitration device for coal-fired power plant

Abstract

The utility model relates to the technical field of flue gas treatment equipment, in particular to a coal-fired power plant flue gas low-temperature denitration device which comprises a denitration mechanism, a connecting shell arranged on the denitration mechanism, a connecting pipe arranged on the connecting shell and a plurality of guide plates movably arranged in the connecting shell. The opening and closing assembly is arranged in the connecting shell and is used for driving the flow guide plate to move through flue gas, so that the blade is driven to scrape off adhered impurities on the outer surface of the flow guide plate, and according to the flue gas low-temperature denitration device for the coal-fired power plant, the arranged opening and closing assembly can move in the flow guide plate; the movable frame arranged in the flow guide plate can be driven to move, the two blades are arranged at the top of the movable frame, the blades can scrape off impurities adhering to the flow guide plate and can prevent the impurities from adhering to the flow guide plate, and therefore the linkage assembly drives the opening and closing assembly to remove the impurities adhering to the flow guide plate. Therefore, high linkage and synchronism are achieved.

Description

Technical Field

[0001] The present utility model relates to the technical field of flue gas treatment equipment, and specifically relates to a low-temperature denitration device for flue gas in coal-fired power plants. Background Technique

[0002] The low-temperature denitration device for flue gas in coal-fired power plants is an environmental protection device used to reduce nitrogen oxides emitted during coal-fired power generation. Nitrogen oxides are one of the main pollutants in the flue gas of coal-fired power plants and have serious negative impacts on the atmospheric environment and human health.

[0003] However, during actual use, when the existing low-temperature denitration device for flue gas in coal-fired power plants is in use, during the deep peak shaving process, it is necessary to heat up water, and heating up water will generate more water vapor. Since a large amount of flue gas is generated after coal combustion, a flow guide plate is provided inside the pipeline. In order to prevent flue gas eddy currents during deep peak shaving and to enable the flue gas to enter evenly by opening the flow guide plate, the flue gas will enter the next process through the flow guide plate inside the low-temperature denitration device for flue gas in coal-fired power plants.

[0004] At this time, the flue gas will be mixed with water vapor, so that sulfur oxides and nitrogen oxides in the flue gas are both mixed with water vapor. Therefore, a certain amount of sulfates and nitrates will be generated. For this reason, the sulfates and nitrates generated by the mixture will adhere to the flow guide plate, adhering to the outer surface of the flow guide plate, which will increase the flow resistance of the flue gas to be discharged, making it impossible to accurately control the voltage load when the low-temperature denitration device for flue gas in coal-fired power plants is performing deep peak shaving. For this reason, we propose a low-temperature denitration device for flue gas in coal-fired power plants. Content of the Utility Model

[0005] One technical problem to be solved by this application is: how to design a low-temperature denitration device for flue gas in coal-fired power plants that can scrape off the impurities adhering to the flow guide plate.

[0006] To solve the above technical problem, the embodiment of this application provides a low-temperature denitration device for flue gas in coal-fired power plants, including a denitration mechanism, a connection shell provided on the denitration mechanism, a connection pipe provided on the connection shell, and a plurality of flow guide plates movably provided inside the connection shell. It also includes:

[0007] A moving frame, the moving frame is provided on the side of the flow guide plate;

[0008] Blades, there are two blades, both are provided on the top of the moving frame, and are used to scrape off the impurities adhering to the outer surface of the flow guide plate;

[0009] An opening and closing assembly, the opening and closing assembly is provided inside the connection shell, and is used to drive the flow guide plate to move through the flue gas, so as to drive the blades to scrape the impurities adhering to the outer surface of the flow guide plate.

[0010] In some embodiments, the opening and closing assembly includes a connecting column disposed on the side surface of the diversion plate. The end surface of the connecting column is disposed on the inner wall of the connecting shell. The other end of the connecting column is provided with a shaft rod. The end surface of the shaft rod is disposed on the inner wall of the connecting shell. A straight groove is formed on the side surface of the diversion plate. The outer surface of the moving frame is movably disposed inside the straight groove. A moving cylinder is movably sleeved on the outer surface of the shaft rod.

[0011] In some embodiments, a spring is sleeved on the outer surface of the shaft rod. The two ends of the spring are respectively disposed at one end of the connecting column and the end surface of the moving cylinder. A connecting clip is disposed on the outer surface of the moving cylinder. A fixed clip is disposed at the bottom of the moving frame. A straight rod is movably disposed between the interiors of the connecting clip and the fixed clip. A linkage assembly for driving the moving cylinder to move is disposed on the end surface of the shaft rod.

[0012] In some embodiments, the linkage assembly includes a driven wheel movably disposed on the inner wall of the connecting shell. A transmission wheel is sleeved on the outer surface of the shaft rod. The driven wheel and the transmission wheel are meshed with each other. A first wedge block is disposed at one end of the driven wheel close to the connecting column. A fixing plate is disposed on the outer surface of the moving cylinder. A second wedge block is disposed on the side surface of the fixing plate. The outer surfaces of the first wedge block and the second wedge block are movably connected to each other.

[0013] In some embodiments, the gear ratio of the driven wheel to the transmission wheel is 10:1.

[0014] In some embodiments, a guiding groove is formed on the side surface of the diversion plate. A guiding block is disposed on the inner wall of the moving frame. The outer surface of the guiding block is movably disposed on the inner wall of the guiding groove.

[0015] In some embodiments, a connecting assembly for replacing the blade is disposed on the outer surface of the moving frame. The connecting assembly includes a screw movably disposed inside the blade. A threaded groove is formed on the top of the moving frame. The outer surface of the screw is threadedly connected to the inner wall of the threaded groove.

[0016] This utility model has at least the following beneficial effects:

[0017] 1. The opening and closing assembly provided can move inside the diversion plate, drive the moving frame disposed inside the diversion plate to move. Two blades are disposed on the top of the moving frame. The blades can scrape off the impurities adhered to the diversion plate, prevent the impurities from adhering to the diversion plate, and prevent the flowing resistance of the flue gas to be discharged from increasing. Therefore, the voltage load can be accurately controlled.

[0018] 2. The linkage assembly provided can drive the linkage assembly to move when multiple diversion plates rotate driven by the flue gas, so that the linkage assembly drives the opening and closing assembly to remove the impurities adhered to the diversion plate. Therefore, it has high linkage and synchronism. Description of the Drawings

[0019] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 This is a schematic diagram of the connection shell and the opening and closing assembly of the present utility model;

[0021] Figure 3 This is a schematic diagram of the opening and closing assembly, the moving frame and the blade of the present utility model;

[0022] Figure 4 This is a schematic diagram of the opening and closing assembly and the flow guide plate of the present utility model;

[0023] Figure 5 This is a schematic diagram of the linkage assembly of the present utility model;

[0024] Figure 6 This is a schematic diagram of the opening and closing assembly of the present utility model;

[0025] Figure 7 This is a schematic diagram of the flow guide plate and the moving frame of the present utility model;

[0026] Figure 8 This is a schematic diagram of the moving frame and the connection assembly of the present utility model;

[0027] Figure 9 This is an exploded schematic diagram of the moving frame, the blade and the connection assembly of the present utility model;

[0028] Figure 10 is Figure 9 An enlarged schematic diagram at A.

[0029] In the figure: 1, pin removal mechanism; 2, connecting pipe; 3, connection shell; 4, flow guide plate; 5, opening and closing assembly; 51, straight groove; 52, straight rod; 53, moving cylinder; 54, shaft rod; 55, connecting column; 56, spring; 57, connecting clip; 58, fixed clip; 6, moving frame; 7, blade; 8, linkage assembly; 81, driven wheel; 82, first wedge block; 83, driving wheel; 84, second wedge block; 85, fixing plate; 9, guide block; 10, guide groove; 11, connection assembly; 111, threaded groove; 112, screw. Detailed Description of the Preferred Embodiments

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1-7 , this utility model provides a technical solution:

[0033] A low-temperature denitration device for flue gas in a coal-fired power plant, including a denitration mechanism 1, a connection shell 3 arranged on the denitration mechanism 1, a connection pipe 2 arranged on the connection shell 3, and a plurality of flow guiding plates 4 movably arranged inside the connection shell 3. The end face of the connection pipe 2 is communicated with the next process. It also includes:

[0034] A moving frame 6, which is arranged on the side of the flow guiding plate 4;

[0035] Blades 7, there are two blades 7, both are arranged on the top of the moving frame 6, used to scrape off the impurities adhered to the outer surface of the flow guiding plate 4. The side of the blade 7 is closely attached to one side of the flow guiding plate 4, which can better remove the impurities on the outer surface of the flow guiding plate 4;

[0036] An opening and closing assembly 5, which is arranged inside the connection shell 3, used to drive the flow guiding plate 4 to move through the flue gas, so as to drive the blade 7 to scrape off the adhered impurities on the outer surface of the flow guiding plate 4.

[0037] The opening and closing assembly 5 includes a connecting column 55 arranged on the side of the flow guiding plate 4. The end face of the connecting column 55 is arranged on the inner wall of the connection shell 3. The other end of the connecting column 55 is provided with a shaft rod 54. The end face of the shaft rod 54 is arranged on the inner wall of the connection shell 3. A straight groove 51 is opened on the side of the flow guiding plate 4. The outer surface of the moving frame 6 is movably arranged inside the straight groove 51. A moving cylinder 53 is movably sleeved on the outer surface of the shaft rod 54. The arranged moving frame 6 can move inside the straight groove 51 to play a limiting role.

[0038] A spring 56 is sleeved on the outer surface of the shaft rod 54. The two ends of the spring 56 are respectively arranged at one end of the connecting column 55 and the end face of the moving cylinder 53. A connecting clip 57 is arranged on the outer surface of the moving cylinder 53. A fixed clip 58 is arranged at the bottom of the moving frame 6. A straight rod 52 is movably arranged between the inside of the connecting clip 57 and the fixed clip 58. A linkage assembly 8 for driving the moving cylinder 53 to move is arranged on the end face of the shaft rod 54. The arranged spring 56 can drive the moving cylinder 53 to reset. The moving cylinder 53 can drive the fixed clip 58 to move through the connecting clip 57 and the straight rod 52.

[0039] The linkage assembly 8 includes a driven wheel 81 movably arranged on the inner wall of the connecting shell 3. A transmission wheel 83 is sleeved on the outer surface of the shaft rod 54. The driven wheel 81 and the transmission wheel 83 are meshed with each other. One end of the driven wheel 81 close to the connecting column 55 is provided with a first wedge block 82. A fixing plate 85 is arranged on the outer surface of the moving cylinder 53. A second wedge block 84 is arranged on the side surface of the fixing plate 85. The outer surfaces of the first wedge block 82 and the second wedge block 84 are movably connected to each other. By rotating the driven wheel 81, the first wedge block 82 is driven to move, so that the first wedge block 82 can drive the second wedge block to move.

[0040] The gear ratio of the driven wheel 81 and the transmission wheel 83 is 10:1. The ratio of 10:1 of the driven wheel 81 and the transmission wheel 83 can make the driven wheel 81 rotate one circle when the transmission wheel 83 rotates ten circles. Therefore, the deflector 4 can be scraped when it rotates ten times.

[0041] A guiding groove 10 is formed on the side surface of the deflector 4. A guiding block 9 is arranged on the inner wall of the moving frame 6. The outer surface of the guiding block 9 is movably arranged on the inner wall of the guiding groove 10. The arrangement of the guiding block 9 and the guiding groove 10 plays a guiding role when the moving frame 6 moves.

[0042] When using this device, first, impurities adhere to the outer surface of the deflector 4. When the deflector 4 rotates, it can drive the connecting column 55 arranged on the side surface to rotate. The connecting column 55 drives the shaft rod 54 to rotate. The shaft rod 54 drives the transmission wheel 83 arranged on the outer surface to rotate. The transmission wheel 83 drives the driven wheel 81 with meshed tooth surfaces to rotate. The driven wheel 81 drives the first wedge block 82 arranged on the end surface to rotate. When the transmission wheel 83 rotates ten circles, the driven wheel 81 rotates one circle. At this time, the inclined surfaces of the first wedge block 82 and the second wedge block 84 are in contact with each other. The second wedge block 84 drives the fixing plate 85 to move. The fixing plate 85 drives the moving cylinder 53 arranged on the side surface to rotate. The inside of the moving cylinder 53 slides on the outer surface of the shaft rod 54. At the same time, the moving cylinder 53 drives the spring 56 arranged on the end surface to deform. At the same time, the moving cylinder 53 drives the connecting clip 57 arranged on the outer surface to move. The connecting clip 57 drives the straight rod 52 arranged inside to move. The straight rod 52 drives the fixed clip 58 arranged on the outer surface to move. The fixed clip 58 drives the moving frame 6 arranged on the side surface to move. The moving frame 6 moves on the outer surface of the deflector 4. Therefore, the moving frame 6 can drive the blade 7 to scrape the outer surface of the moving frame 6. When the first wedge block 82 moves away from the second wedge block 84, the spring 56 resets, driving the moving cylinder 53 to reset, thereby driving the blade 7 and the moving frame 6 to reset. Therefore, the impurities on the outer surface of the deflector 4 can be removed.

[0043] Embodiment 2

[0044] Please refer to Figures 8-10 , this utility model provides a technical solution:

[0045] Different from Embodiment 1, a connection component 11 for replacing the blade 7 is arranged on the outer surface of the moving frame 6. The connection component 11 includes a screw 112 movably arranged inside the blade 7. A threaded groove 111 is formed at the top of the moving frame 6, and the outer surface of the screw 112 is threadedly connected to the inner wall of the threaded groove 111.

[0046] When it is necessary to replace the blade 7 on the moving frame 6, the screw 112 needs to be rotated out of the threaded groove 111, so that the blade 7 can be replaced. Finally, the screw 112 can be tightened into the threaded groove 111 formed at the top of the moving frame 6.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present utility have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility. The scope of the present utility is defined by the appended claims and their equivalents.

Claims

1. A flue gas low-temperature denitration device for a coal-fired power plant, comprising a denitration mechanism (1), a connection shell (3) arranged on the denitration mechanism (1), a connection pipe (2) arranged on the connection shell (3), and a plurality of flow guide plates (4) movably arranged inside the connection shell (3), characterized in that: It further includes: A moving frame (6), which is arranged on the side of the deflector (4); Blades (7), there are two blades (7), both are arranged on the top of the moving frame (6) for scraping off the impurities adhered to the outer surface of the deflector (4); An opening and closing component (5), which is arranged inside the connection shell (3) and is used to drive the deflector (4) to move through the flue gas, thereby driving the blades (7) to scrape off the adhered impurities on the outer surface of the deflector (4).

2. The low-temperature denitration device for flue gas of a coal-fired power plant according to claim 1, characterized in that: The opening and closing component (5) includes a connecting column (55) arranged on the side of the deflector (4), the end face of the connecting column (55) is arranged on the inner wall of the connection shell (3), the other end of the connecting column (55) is provided with a shaft rod (54), the end face of the shaft rod (54) is arranged on the inner wall of the connection shell (3), a straight groove (51) is opened on the side of the deflector (4), the outer surface of the moving frame (6) is movably arranged inside the straight groove (51), and a moving cylinder (53) is movably sleeved on the outer surface of the shaft rod (54).

3. The low-temperature denitration device for flue gas of a coal-fired power plant according to claim 2, characterized in that: A spring (56) is sleeved on the outer surface of the shaft rod (54), both ends of the spring (56) are respectively arranged at one end of the connecting column (55) and the end face of the moving cylinder (53), a connecting clip (57) is arranged on the outer surface of the moving cylinder (53), a fixed clip (58) is arranged at the bottom of the moving frame (6), and a straight rod (52) is movably arranged between the interiors of the connecting clip (57) and the fixed clip (58), and a linkage component (8) for driving the moving cylinder (53) to move is arranged at the end face of the shaft rod (54).

4. The low-temperature denitration device for flue gas of a coal-fired power plant according to claim 3, wherein: The linkage component (8) includes a driven wheel (81) movably arranged on the inner wall of the connection shell (3), a transmission wheel (83) is sleeved on the outer surface of the shaft rod (54), the driven wheel (81) and the transmission wheel (83) are meshed with each other, a first wedge block (82) is arranged at one end of the driven wheel (81) close to the connecting column (55), a fixing plate (85) is arranged on the outer surface of the moving cylinder (53), a second wedge block (84) is arranged on the side of the fixing plate (85), and the outer surfaces of the first wedge block (82) and the second wedge block (84) are movably connected to each other.

5. The flue gas low-temperature denitration device for a coal-fired power plant according to claim 4, characterized in that: The gear ratio of the driven wheel (81) and the transmission wheel (83) is 10:

1.

6. The low-temperature denitration device for flue gas of a coal-fired power plant according to claim 5, wherein: A guiding groove (10) is opened on the side of the deflector (4), a guiding block (9) is arranged on the inner wall of the moving frame (6), and the outer surface of the guiding block (9) is movably arranged on the inner wall of the guiding groove (10).

7. The low-temperature denitration device for flue gas of a coal-fired power plant according to claim 6, characterized in that: A connection component (11) for replacing the blades (7) is arranged on the outer surface of the moving frame (6), the connection component (11) includes a screw (112) movably arranged inside the blade (7), a threaded groove (111) is opened on the top of the moving frame (6), and the outer surface of the screw (112) is threadedly connected to the inner wall of the threaded groove (111).

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