Denitration device for flue gas treatment of coal-fired boiler

Abstract

The utility model relates to the technical field of flue gas treatment, in particular to a denitration device for flue gas treatment of a coal-fired boiler. Comprising a treatment box, a round pipe with the two ends penetrating through the top and the bottom of the treatment box respectively is arranged in the treatment box, the treatment box and the round pipe are arranged in a sliding mode, the round pipe is rotationally arranged in the treatment box, a plurality of hollow discs are fixedly connected to the round pipe in a vertical array mode, and the hollow discs are arranged in the treatment box; and the hollow disc is communicated with the interior of the circular tube. According to the utility model, when flue gas is exhausted through the exhaust holes, is in contact with a wet desulfurization agent and is subjected to desulfurization and denitrification treatment, the hollow disc rotates and vertically reciprocates at the same time, so that the flue gas exhausted through the exhaust holes can be in complete contact with the wet desulfurization agent; the whole area of the wet desulfurization agent can play a role in desulfurization and denitrification treatment on the flue gas, the utilization rate of the wet desulfurization agent is increased, and waste of the wet desulfurization agent is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to a denitrification device for treating flue gas from a coal-fired boiler. Background Art

[0002] In industrial production, flue gas accounts for about 90% of the pollutant emissions from the combustion of combustible materials such as coal and fuel. About 1 / 4 of the total sulfur dioxide emissions are caused by coal burning in thermal power plants. The main goals of controlling coal-fired pollution and industrial flue gas treatment are denitrification, desulfurization and dust removal.

[0003] The utility model with authorization announcement number CN217287866U provides a dry-wet integrated flue gas desulfurization and denitrification device, which is evenly discharged to the wet desulfurizer through the flue gas exhaust mechanism for full contact. The contact sufficiency is high, which effectively improves the efficiency of the wet desulfurization and denitrification reaction of the flue gas.

[0004] The above-mentioned dry-wet integrated flue gas desulfurization and denitrification device allows the flue gas to be discharged through the exhaust holes. Since the position of the exhaust holes remains unchanged, the flue gas can only contact one position of the wet desulfurizer. Some areas of the wet desulfurizer do not contact the flue gas, resulting in the wet desulfurizer cannot be fully utilized, resulting in a waste of part of the wet desulfurizer. In view of this, we propose a denitrification device for coal-fired boiler flue gas treatment. Summary of the Invention

[0005] The purpose of the utility model is to provide a denitrification device for treating flue gas from a coal-fired boiler, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, one of the purposes of the present invention is to provide a denitrification device for treating flue gas from a coal-fired boiler, comprising a treatment box, wherein a circular tube is provided inside the treatment box, with both ends respectively passing through the top and bottom of the treatment box, the treatment box and the circular tube are slidingly arranged between them, and the circular tube is rotatably arranged inside the treatment box, and a plurality of hollow disks are fixedly connected in a vertical array at a position where the outer wall of the circular tube is located inside the treatment box, and the hollow disk is arranged inside the treatment box, and the hollow disk is connected to the inside of the circular tube, and a plurality of discharge holes are opened in a circular array on the side wall of the hollow disk, An annular mesh cylinder is fixedly connected between the top and bottom surfaces inside the processing box, and the inside of the annular mesh cylinder is filled with wet desulfurization agent. A hollow disk is arranged inside the annular mesh cylinder and the wet desulfurization agent. The lower end of the circular tube is fixedly connected to a bottom plate, and the bottom plate seals the bottom of the circular tube. Two telescopic rods are fixedly connected to the lower surface of the bottom plate, and the lower ends of the two telescopic rods are fixedly connected to a driven disk. The outer wall of the driven disk is rotatably connected to a base frame, and a rotating mechanism and a reciprocating mechanism are provided on the base frame. The rotating mechanism is used to drive the driven disk to rotate, and the reciprocating mechanism is used to drive the base plate to move back and forth vertically.

[0007] As a further improvement of this technical solution, the rotating mechanism includes a CNC servo motor installed on one side of the base frame, a driving wheel is coaxially fixedly connected to the output shaft of the CNC servo motor, and a transmission belt is connected to the outer side of the driving wheel and the driven disk.

[0008] As a further improvement of the present technical solution, the reciprocating mechanism includes a reciprocating screw rotatably connected to the driven disk, a square tube is threadedly connected to the outer side of the reciprocating screw, the upper end of the square tube is rotatably connected to the lower surface of the base plate, a square guide frame is slidingly sleeved on the outer side of the square tube, and the lower end of the square guide frame is fixedly connected to the base frame.

[0009] As a further improvement of the present technical solution, a second motor is fixedly connected to the bottom surface of the chassis, and bevel gears are fixedly connected to the output shaft of the second motor and the lower end of the reciprocating screw, and the two bevel gears are meshed with each other.

[0010] As a further improvement of the present technical solution, the upper end of the circular tube is rotatably connected to an air inlet pipe, an exhaust pipe is fixedly connected to one side of the processing box near the bottom, and a plurality of support rods are fixedly connected to the lower surface of the processing box, and the support rods and the lower surface of the base frame are located on the same horizontal plane.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The denitrification device for treating flue gas from a coal-fired boiler has a wet desulfurization agent that desulfurizes and denitrates the flue gas when the flue gas is discharged through the exhaust holes and contacts the wet desulfurization agent. At the same time, the hollow disc moves vertically back and forth during rotation, so that the flue gas discharged from the exhaust holes can fully contact the wet desulfurization agent, so that the entire area of the wet desulfurization agent can play a role in desulfurizing and denitrifying the flue gas, thereby improving the utilization rate of the wet desulfurization agent and avoiding waste of the wet desulfurization agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 It is a structural diagram of the rotating mechanism and reciprocating mechanism of the utility model;

[0016] Figure 4 It is a partial exploded view of the reciprocating mechanism and driven disc combination of the utility model;

[0017] Figure 5 This is a structural diagram of the chassis and driven disc of the utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Processing box; 11. Exhaust pipe; 12. Support rod;

[0020] 2. Round tube; 21. Hollow disk; 22. Exhaust holes; 23. Air inlet pipe; 24. Bottom plate;

[0021] 3. Annular mesh drum; 31. Wet desulfurization agent;

[0022] 4. Base frame; 5. Driven plate; 6. Telescopic rod;

[0023] 7. Rotating mechanism; 71. CNC servo motor; 72. Driving pulley; 73. Transmission belt;

[0024] 8. Reciprocating mechanism; 81. Reciprocating screw; 82. Square cylinder; 83. Square guide frame; 84. Second motor; 85. Bevel gear. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0026] See also Figure 1-Figure 2As shown, one of the purposes of this embodiment is to provide a denitrification device for treating flue gas from a coal-fired boiler, comprising a treatment box 1, a plurality of support rods 12 fixedly connected to the lower surface of the treatment box 1, the lower ends of the plurality of support rods 12 touching the ground, stably placing the treatment box 1 on the ground, a circular tube 2 with two ends respectively passing through the top and bottom of the treatment box 1 is provided inside the treatment box 1, a sliding arrangement is set between the treatment box 1 and the circular tube 2, and the circular tube 2 is rotatably set inside the treatment box 1, a plurality of hollow disks 21 are fixedly connected to the circular tube 2 in a vertical array, the hollow disk 21 is set inside the treatment box 1, the hollow disk 21 is connected to the interior of the circular tube 2, a plurality of discharge holes 22 are opened in a circular array on the side wall of the hollow disk 21, the discharge holes 22 are connected to the interior of the hollow disk 21, and the upper end of the circular tube 2 is rotatably connected to the air inlet pipe 23. After the air inlet pipe 23 is connected to the flue, the flue gas in the flue enters the interior of the circular tube 2 through the air inlet pipe 23. The flue gas in the circular tube 2 then enters the interior of several hollow disks 21 respectively and is discharged through several exhaust holes 22. An annular mesh tube 3 is fixedly connected between the top and bottom surfaces of the interior of the treatment box 1. The interior of the annular mesh tube 3 is filled with a wet desulfurizer 31. The hollow disk 21 is arranged inside the annular mesh tube 3 and the wet desulfurizer 31. After the flue gas discharged from the exhaust holes 22 contacts the wet desulfurizer 31 through the mesh holes of the annular mesh tube 3, the wet desulfurizer 31 desulfurizes and denitrifies the flue gas. An exhaust pipe 11 is fixedly connected to a position near the bottom of one side of the treatment box 1. The flue gas after desulfurization and denitrification is discharged from the treatment box 1 through the exhaust pipe 11, so that the device can quickly desulfurize and denitrify the flue gas.

[0027] The flue gas discharged through the plurality of discharge holes 22 can only contact one position of the wet desulfurizer 31. Some areas of the wet desulfurizer 31 do not contact the flue gas, so that the wet desulfurizer 31 cannot desulfurize and denitrify the flue gas, resulting in the wet desulfurizer 31 being unable to be fully utilized. To avoid this situation, refer to Figure 1-Figure 5The lower end of the circular tube 2 is fixedly connected to a bottom plate 24, and two telescopic rods 6 are fixedly connected to the lower surface of the bottom plate 24. The lower ends of the two telescopic rods 6 are fixedly connected to a driven disk 5. The outer wall of the driven disk 5 is rotatably connected to the base frame 4. The lower surfaces of the support rods 12 and the base frame 4 are located on the same horizontal plane. The lower surfaces of the support rods 12 and the base frame 4 also touch the ground. A rotating mechanism 7 and a reciprocating mechanism 8 are provided on the base frame 4. The rotating mechanism 7 is used to drive the driven disk 5 to rotate alternately in forward and reverse directions. When the driven disk 5 rotates, the driven disk 5 drives the bottom plate 24, the circular tube 2, the hollow disk 21 and the discharge hole 22 to rotate synchronously through the two telescopic rods 6, so that the discharge hole 22 can rotate horizontally to adjust the direction of the exhaust gas, so that the wet desulfurizer 31 is located positively in the hollow disk 21 The outer area can fully play the role of purifying flue gas. The reciprocating mechanism 8 is used to drive the bottom plate 24 to move back and forth vertically. When the bottom plate 24 moves back and forth vertically, the bottom plate 24 drives the circular tube 2, the hollow disk 21 and the discharge hole 22 to move back and forth vertically synchronously, so that the discharge hole 22 can vertically adjust the position of the exhaust flue gas in contact with the wet desulfurizer 31, and vertically expand the area of the wet desulfurizer 31 to purify the flue gas. By keeping the bottom plate 24 rotating during the vertical reciprocating movement, the flue gas discharged from the discharge hole 22 can be fully in contact with the wet desulfurizer 31, so that the entire area of the wet desulfurizer 31 can play the role of desulfurization and denitrification of the flue gas, thereby improving the utilization rate of the wet desulfurizer 31 and avoiding waste of the wet desulfurizer 31.

[0028] In order to drive the driven disc 5 to rotate, the structure of the rotating mechanism 7 is detailed below. Figure 3 The rotating mechanism 7 includes a CNC servo motor 71 installed on one side of the base frame 4. A driving wheel 72 is coaxially fixedly connected to the output shaft of the CNC servo motor 71. A transmission belt 73 is connected to the outer side of the driving wheel 72 and the driven disk 5. After the CNC servo motor 71 is started, its output shaft drives the driving wheel 72 to rotate, and the driving wheel 72 drives the driven disk 5 to rotate through the transmission belt 73.

[0029] In order to drive the bottom plate 24 to move back and forth vertically, the structure of the reciprocating mechanism 8 is detailed below. Figure 3 and Figure 4The reciprocating mechanism 8 includes a reciprocating screw 81 rotatably connected to the side wall of the driven disk 5, and a square cylinder 82 is threadedly connected to the outer side of the reciprocating screw 81. The upper end of the square cylinder 82 is rotatably connected to the lower surface of the bottom plate 24. A square guide frame 83 is provided on the outer side of the square cylinder 82. The lower end of the square guide frame 83 is fixedly connected to the bottom frame 4. The square guide frame 83 limits the vertical movement of the square cylinder 82. The bottom surface of the bottom frame 4 is fixedly connected to a second motor 84. The output shaft of the second motor 84 and the lower end of the reciprocating screw 81 are fixedly connected to a bevel gear 85. The two bevel gears 85 are connected to each other. When the second motor 84 is engaged, its output shaft drives one of the bevel gears 85 to rotate. Through the meshing transmission of the two bevel gears 85, the other bevel gear 85 drives the reciprocating screw 81 to rotate. Through the threaded connection between the reciprocating screw 81 and the square cylinder 82, the square cylinder 82 is made to move vertically back and forth, and the bottom plate 24 moves vertically back and forth synchronously with the square cylinder 82. When the bottom plate 24 moves vertically, the telescopic rod 6 is correspondingly extended and retracted, so that the driven disc 5 can still drive the bottom plate 24 to rotate through the telescopic rod 6, so that the exhaust hole 22 is rotated horizontally to adjust the direction of exhaust gas.

[0030] The CNC servo motor 71 is connected to an external computer device, and the external computer device can accurately control the rotation direction and rotation angle of the output shaft of the CNC servo motor 71. When the computer device controls the output shaft of the CNC servo motor 71 to rotate forward, the driven disk 5 drives the two telescopic rods 6 to rotate forward. When the telescopic rods 6 rotate to a position in contact with the square guide frame 83, the output shaft of the CNC servo motor 71 rotates forward to the maximum angle. At this time, the CNC servo motor 71 stops rotating forward, and then the output shaft of the CNC servo motor 71 is changed to reverse rotation. When the output shaft of the CNC servo motor 71 drives the driven disk 5 to rotate reversely, the driven disk 5 drives the telescopic rod 6 to rotate reversely to a position in contact with the square guide frame 83, the CNC The output shaft of the servo motor 71 is reversed to the maximum angle, at which time the CNC servo motor 71 stops reversing, and the output shaft of the CNC servo motor 71 is switched to the forward rotation state again, and this reciprocating process causes the output shaft of the CNC servo motor 71 to continuously switch between forward rotation and reverse rotation, and there will be no situation where the square guide frame 83 blocks the rotation of the telescopic rod 6. In the process of the driven disk 5 driving the hollow disk 21 to rotate forward and reverse a certain angle, the exhaust hole 22 is rotated horizontally to adjust the direction of exhausting smoke, and the output shaft speed of the CNC servo motor 71 is kept constant at a slower speed to prevent the driven disk 5 from rotating too fast, causing the connection between the two ends of the telescopic rod 6 and the driven disk 5 and the bottom plate 24 to be damaged due to large shear force.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A denitrification device for treating flue gas from a coal-fired boiler, comprising a treatment box (1), characterized in that: The processing box (1) is provided with a circular tube (2) with two ends passing through the top and bottom of the processing box (1) respectively. The processing box (1) and the circular tube (2) are slidably arranged between them, and the circular tube (2) is rotatably arranged inside the processing box (1). A plurality of hollow disks (21) are fixedly connected in a vertical array on the circular tube (2). The hollow disks (21) are arranged inside the processing box (1). The hollow disks (21) and the inside of the circular tube (2) are connected. A plurality of discharge holes (22) are opened in an annular array on the side wall of the hollow disk (21). An annular mesh cylinder (3) is fixedly connected between the top and bottom surfaces of the processing box (1). The inside of the annular mesh cylinder (3) is filled with A wet desulfurizer (31) is provided, wherein the hollow disk (21) is arranged inside the annular mesh cylinder (3) and the wet desulfurizer (31); the lower end of the circular tube (2) is fixedly connected to a bottom plate (24); the bottom plate (24) blocks the bottom of the circular tube (2); two telescopic rods (6) are fixedly connected to the lower surface of the bottom plate (24); the lower ends of the two telescopic rods (6) are fixedly connected to a driven disk (5); the outer wall of the driven disk (5) is rotatably connected to a base frame (4); a rotating mechanism (7) and a reciprocating mechanism (8) are provided on the base frame (4); the rotating mechanism (7) is used to drive the driven disk (5) to rotate; and the reciprocating mechanism (8) is used to drive the bottom plate (24) to move back and forth vertically.

2. The denitrification device for treating flue gas from a coal-fired boiler according to claim 1, characterized in that: The rotating mechanism (7) comprises a numerical control servo motor (71) mounted on one side of the chassis (4); a driving wheel (72) is coaxially fixedly connected to the output shaft of the numerical control servo motor (71); and a transmission belt (73) is connected to the outer side of the driving wheel (72) and the driven disc (5).

3. The denitrification device for treating flue gas from a coal-fired boiler according to claim 1, characterized in that: The reciprocating mechanism (8) includes a reciprocating screw (81) rotatably connected to the driven disc (5), a square cylinder (82) is threadedly connected to the outer side of the reciprocating screw (81), the upper end of the square cylinder (82) is rotatably connected to the lower surface of the base plate (24), and a square guide frame (83) is provided on the outer side of the square cylinder (82) in a sliding sleeve, and the lower end of the square guide frame (83) is fixedly connected to the base frame (4).

4. The denitrification device for treating flue gas from a coal-fired boiler according to claim 3, characterized in that: A second motor (84) is fixedly connected to the bottom surface of the base frame (4), and a bevel gear (85) is fixedly connected to the output shaft of the second motor (84) and the lower end of the reciprocating screw rod (81), and the two bevel gears (85) are meshed with each other.

5. The denitrification device for treating flue gas from a coal-fired boiler according to claim 1, characterized in that: The upper end of the circular tube (2) is rotatably connected to an air inlet pipe (23), and a position near the bottom of one side of the processing box (1) is fixedly connected to an exhaust pipe (11). The lower surface of the processing box (1) is fixedly connected to a plurality of support rods (12), and the support rods (12) and the lower surface of the base frame (4) are located on the same horizontal plane.

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