Flue gas treatment device for coal-fired boiler

Abstract

The utility model discloses a coal-fired boiler flue gas treatment device, which relates to the field of coal-fired boiler flue gas treatment and comprises a dust removal box, a cooling box and a denitration box, a spraying mechanism is arranged in the dust removal box, a cooling mechanism is arranged in the cooling box, and an S-shaped pipe is arranged in the cooling box through the cooling mechanism. A fan is arranged at the bottom of one side, far away from the dust removal box, of the cooling box; an exhaust pipe is arranged at the bottom of the outer side wall of the denitration box; the device has the advantages that the S-shaped pipe can effectively prolong the flowing time of smoke in the cooling box, heat of the S-shaped pipe can be fully absorbed by water, heat in the smoke can be removed, the device is prevented from being damaged due to the fact that the temperature of the smoke is too high, and the supporting plate moves left and right in the dust removal box; the support can move left and right in the sliding groove through the sliding plate along with movement of the water pipe, the water pipe is supported, winding is avoided, the spraying range is effectively expanded, and the spraying and dust removing effect on smoke is better.

Description

Technical Field

[0001] The utility model relates to the field of coal-fired boiler smoke treatment, in particular to a coal-fired boiler smoke treatment device. Background Art

[0002] The coal-fired boiler flue gas treatment device is a device used to treat the flue gas generated by a coal-fired boiler. The main purpose of this device is to remove harmful substances in the flue gas, such as sulfur dioxide, nitrogen oxides, dust, etc., in order to meet environmental emission requirements.

[0003] After searching, the patent number CN210874633U discloses a coal-fired boiler flue gas treatment device, which includes a shell, an air inlet equalizing pipe, a bracket, an air guide plate, an ash hopper, a middle box, an upper box and a smoke exhaust device. Although the larger particles first pass through the ash hopper for natural sedimentation, the bag only needs to filter the fine particles, which can greatly reduce the resistance of the flue gas treatment device and reduce energy consumption. However, the heat treatment effect in the flue gas is not good, which makes the device easy to be damaged during the subsequent treatment of the flue gas. For this reason, we propose a coal-fired boiler flue gas treatment device. Utility Model Content

[0004] The utility model aims to solve the problem that the existing coal-fired boiler flue gas treatment device has poor heat treatment effect on the flue gas, which leads to easy damage to the device during subsequent treatment of the flue gas.

[0005] In order to solve the above technical problems, the technical solution of the utility model is a coal-fired boiler flue gas treatment device, comprising a dust removal box, a cooling box and a denitrification box, the dust removal box is provided with a spray mechanism, the cooling box is provided with a cooling mechanism, the cooling box is provided with an S-shaped pipe through the cooling mechanism, the cooling box is provided with a fan at the bottom of the cooling box away from the dust removal box, and an exhaust pipe is provided on the outer wall of the denitrification box at the bottom.

[0006] As a further solution of the utility model: the cooling mechanism includes a horizontal frame, a plurality of card slots are opened on the horizontal frame, a spray pipe is arranged on the top of the S-shaped tube, a water pump is arranged at the bottom end of the cooling box, and the output end of the water pump is connected to a water pipe.

[0007] As a further solution of the utility model: the two groups of cross frames are symmetrically arranged and arranged between the two inner walls of the cooling box by welding, the S-shaped tube is arranged in the inner position of the cooling box through the cross frame matching slot, and the end of the S-shaped tube away from the spray tube is connected to the output end of the fan.

[0008] As a further solution of the utility model: the spray mechanism includes a support plate, the two inner walls of the dust removal box are provided with transverse grooves on both sides of the support plate, a threaded rod is provided between the two inner walls of the transverse groove, a slider is provided on the threaded rod and is located inside the transverse groove for sliding, the dust removal box is provided with a motor connected to the threaded rod, and a plurality of groups of nozzles are provided at the bottom end of the support plate.

[0009] As a further solution of the utility model: sliding grooves are provided on both inner side walls of the dust removal box and located above the transverse grooves, a slide plate is slidably provided inside the sliding grooves, and a bracket is provided at one end of the slide plate.

[0010] As a further solution of the utility model: the bracket is slidably arranged on the inner wall of the dust removal box along the slide groove through a slide plate, the end of the water pipe away from the water pump is connected to the support plate, and the hollow support plate is connected to the nozzle, and the water pipe is set on the bracket.

[0011] The above technical solution is adopted: the cross frames are respectively arranged in groups of two at the top and bottom of the S-shaped tube through the card slots, and then the cross frames are fixed to the inside of the cooling box by welding, and the cooling box is filled with a sufficient amount of water. The flue gas generated by the coal-fired boiler is sucked out by the fan, and then the fan transmits the flue gas to the inside of the S-shaped tube to make it move inside the cooling box. The S-shaped tube can effectively increase the flow time of the flue gas inside the cooling box, so that its own heat can be fully absorbed by the water, thereby removing the heat in the flue gas and preventing the flue gas temperature from being too high to damage the device.

[0012] The water pump transfers the water inside the cooling box to the inside of the support plate through the water pipe, and then sprays it out through the nozzle to spray the flue gas, thereby removing the dust in the flue gas. During this process, the motor is started to make it rotate forward and reverse in a cycle, so that the threaded rod drives the slider to repeatedly move left and right inside the horizontal groove, and then the support plate moves left and right inside the dust removal box. During this process, the bracket will move left and right inside the slide groove through the slide plate as the water pipe moves, supporting the water pipe to avoid entanglement, effectively expanding the spray range and achieving better spray dust removal effect on the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a coal-fired boiler flue gas treatment device in an embodiment of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the cooling box in the embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the partial structure of the dust removal box in the embodiment of the utility model;

[0016] Figure 4 It is a schematic structural diagram of the dust removal box and the support plate in the embodiment of the utility model.

[0017] In the figure: 1. Dust removal box; 2. Cooling box; 3. Fan; 4. Denitrification box; 5. Exhaust pipe; 6. Cooling mechanism; 7. S-shaped pipe; 8. Cross frame; 9. Slot; 10. Spray pipe; 11. Water pump; 12. Water pipe; 13. Spray mechanism; 14. Cross groove; 15. Threaded rod; 16. Slider; 17. Slide; 18. Slide plate; 19. Bracket; 20. Support plate; 21. Nozzle; 23. Motor. DETAILED DESCRIPTION

[0018] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other. Embodiment 1

[0019] See also Figure 1-Figure 4 The utility model provides a technical solution: a coal-fired boiler flue gas treatment device, including a dust removal box 1, a cooling box 2 and a denitrification box 4, a spray mechanism 13 is arranged inside the dust removal box 1, a cooling mechanism 6 is arranged inside the cooling box 2, an S-shaped pipe 7 is arranged inside the cooling box 2 through the cooling mechanism 6, a fan 3 is arranged at the bottom of the cooling box 2 away from the dust removal box 1, and an exhaust pipe 5 is arranged on the outer wall of the denitrification box 4 and at the bottom.

[0020] See also Figure 2 and Figure 3 The cooling mechanism 6 includes a horizontal frame 8, on which a plurality of card slots 9 are provided, a spray pipe 10 is provided on the top of the S-shaped tube 7, a water pump 11 is provided at the bottom end of the cooling box 2, and a water pipe 12 is connected to the output end of the water pump 11.

[0021] The two sets of cross frames 8 are symmetrically arranged and welded between the two inner walls of the cooling box 2. The S-shaped tube 7 is arranged inside the cooling box 2 through the cross frames 8 and the slots 9. The end of the S-shaped tube 7 away from the spray tube 10 is connected to the output end of the fan 3.

[0022] When in use, the staff places the S-shaped tube 7 inside the cooling box 2, and respectively clamps the cross frames 8 at the top and bottom positions of the S-shaped tube 7 through the slots 9 in groups of two, and then fixes the cross frames 8 to the cooling box 2 by welding, fills the cooling box 2 with a sufficient amount of water, and the flue gas generated by the coal-fired boiler is sucked out by the fan 3, and then the fan 3 transmits the flue gas to the S-shaped tube 7 to move it inside the cooling box 2. The S-shaped tube 7 can effectively increase the flow time of the flue gas in the cooling box 2, so that its own heat can be fully absorbed by water, thereby removing the heat in the flue gas and preventing the flue gas temperature from being too high to damage the device. The cooled flue gas is sprayed into the dust removal box 1 through the spray pipe 10. Embodiment 2

[0023] See also Figure 1-Figure 4 The utility model provides a technical solution: a coal-fired boiler flue gas treatment device, including a dust removal box 1, a cooling box 2 and a denitrification box 4, a spray mechanism 13 is arranged inside the dust removal box 1, a cooling mechanism 6 is arranged inside the cooling box 2, an S-shaped pipe 7 is arranged inside the cooling box 2 through the cooling mechanism 6, a fan 3 is arranged at the bottom of the cooling box 2 away from the dust removal box 1, and an exhaust pipe 5 is arranged on the outer wall of the denitrification box 4 and at the bottom.

[0024] See also Figure 4 The spray mechanism 13 includes a support plate 20, and transverse grooves 14 are provided on both inner walls of the dust removal box 1 and on both sides of the support plate 20. A threaded rod 15 is provided between the two inner walls of the transverse groove 14, and a slider 16 is slidably provided on the threaded rod 15 and inside the transverse groove 14. A motor 23 connected to the threaded rod 15 is provided on the dust removal box 1, and a plurality of groups of nozzles 21 are provided at the bottom end of the support plate 20.

[0025] Slide grooves 17 are provided on both inner side walls of the dust removal box 1 and above the transverse groove 14 . A slide plate 18 is slidably provided inside the slide groove 17 . A bracket 19 is provided at one end of the slide plate 18 .

[0026] The bracket 19 is slidably arranged on the inner wall of the dust removal box 1 along the slide groove 17 through the slide plate 18, and the end of the water pipe 12 away from the water pump 11 is connected to the support plate 20, and the support plate 20 is hollow and connected to the nozzle 21, and the water pipe 12 is mounted on the bracket 19.

[0027] Specifically, the water pump 11 transmits the water inside the cooling box 2 to the inside of the support plate 20 through the water pipe 12, and then sprays it out through the nozzle 21 to spray the flue gas, thereby removing dust in the flue gas. During this process, the motor 23 is started to make it rotate forward and reverse in a cycle, so that the threaded rod 15 drives the slider 16 to repeatedly move left and right inside the transverse groove 14, and then the support plate 20 moves left and right inside the dust removal box 1. During this process, the bracket 19 will move left and right inside the slide groove 17 through the slide plate 18 as the water pipe 12 moves, supporting the water pipe 12 to avoid entanglement, effectively expanding the spray range to achieve a better spray dust removal effect on the flue gas, and then the flue gas is transmitted to the denitrification box 4 for denitrification treatment and then discharged through the exhaust pipe 5.

[0028] Working principle: the staff places the S-shaped tube 7 inside the cooling box 2, and respectively clamps the cross frames 8 at the top and bottom of the S-shaped tube 7 through the slots 9 in groups of two, and then fixes the cross frames 8 inside the cooling box 2 by welding, and fills the cooling box 2 with sufficient water. The flue gas generated by the coal-fired boiler is sucked out by the fan 3, and then the fan 3 transmits the flue gas to the inside of the S-shaped tube 7 to move it inside the cooling box 2. The S-shaped tube 7 can effectively increase the flow time of the flue gas inside the cooling box 2, so that its own heat can be fully absorbed by the water, thereby removing the heat in the flue gas and preventing the flue gas temperature from being too high to damage the device. The cooled flue gas is sprayed into the dust removal box 1 through the spray pipe 10. The water pump 11 transmits the water inside the cooling box 2 to the inside of the support plate 20 through the water pipe 12, and then sprays it out through the nozzle 21 to spray the flue gas, thereby removing the dust in the flue gas. In this process, the motor 23 is started to make it rotate forward and reverse in a cycle, so that the threaded rod 15 drives the slider 16 to repeatedly move left and right inside the transverse groove 14, and then the support plate 20 moves left and right inside the dust removal box 1. In this process, the bracket 19 will move left and right inside the slide groove 17 through the slide plate 18 as the water pipe 12 moves, supporting the water pipe 12 to avoid entanglement, effectively expanding the spray range to achieve a better spray dust removal effect on the flue gas, and then the flue gas is transmitted to the denitrification box 4 for denitrification treatment and then discharged through the exhaust pipe 5.

[0029] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A coal-fired boiler flue gas treatment device, comprising a dust removal box (1), a cooling box (2) and a denitrification box (4), characterized in that: The dust removal box (1) is provided with a spray mechanism (13) inside, the cooling box (2) is provided with a cooling mechanism (6) inside, an S-shaped pipe (7) is provided inside the cooling box (2) through the cooling mechanism (6), a fan (3) is provided at the bottom of the cooling box (2) away from the dust removal box (1), and an exhaust pipe (5) is provided on the outer wall of the denitration box (4) at the bottom.

2. A coal-fired boiler flue gas treatment device according to claim 1, characterized in that: The cooling mechanism (6) comprises a cross frame (8) on which a plurality of card slots (9) are formed, a spray pipe (10) is arranged on the top of the S-shaped tube (7), a water pump (11) is arranged at the bottom end of the cooling box (2), and the output end of the water pump (11) is connected to a water pipe (12).

3. A coal-fired boiler flue gas treatment device according to claim 2, characterized in that: The two groups of cross frames (8) are symmetrically arranged and are arranged between the two inner side walls of the cooling box (2) by welding. The S-shaped tube (7) is arranged in a position inside the cooling box (2) through the cross frame (8) and the slot (9). The end of the S-shaped tube (7) away from the spray tube (10) is connected to the output end of the fan (3).

4. A coal-fired boiler flue gas treatment device according to claim 1, characterized in that: The spray mechanism (13) comprises a support plate (20), transverse grooves (14) are provided on both inner side walls of the dust removal box (1) and at both sides of the support plate (20), a threaded rod (15) is provided between the two inner side walls of the transverse groove (14), a slider (16) is slidably provided on the threaded rod (15) and inside the transverse groove (14), a motor (23) connected to the threaded rod (15) is provided on the dust removal box (1), and a plurality of groups of spray heads (21) are provided at the bottom end of the support plate (20).

5. A coal-fired boiler flue gas treatment device according to claim 4, characterized in that: Slide grooves (17) are provided on both inner side walls of the dust removal box (1) and located above the transverse groove (14). A slide plate (18) is slidably provided inside the slide groove (17). A bracket (19) is provided at one end of the slide plate (18).

6. A coal-fired boiler flue gas treatment device according to claim 5, characterized in that: The support (19) is slidably arranged on the inner wall of the dust removal box (1) along the slide groove (17) via the slide plate (18); the end of the water pipe (12) away from the water pump (11) is connected to the support plate (20); the hollow part of the support plate (20) is connected to the nozzle (21); and the water pipe (12) is mounted on the support (19).

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