Dedusting device for desulfurization and denitrification of furnace flue gas

Abstract

The dust removal device comprises a heat exchange box, the right side of the top of the heat exchange box is communicated with a water supplementing pipe, an inner cavity of the heat exchange box is provided with a flue gas pipe, the rear side of the inner cavity of the heat exchange box is fixedly connected with a temperature sensor, and the bottom of the front side of the heat exchange box is communicated with a drainage pipe. Through cooperative use of the heat exchange box, the water supplementing pipe, the flue gas pipe, the temperature sensor and the drainage pipe, heat in flue gas can be recycled, resources can be effectively utilized, dust removal elements such as a dust removal net can be protected after the flue gas temperature is reduced, element aging caused by high temperature is prevented, and the service life of the flue gas is prolonged. Through cooperative use of the dust removal box, the flow division pipe, the purification pipe, the blowing pipe, the nozzles, the partition plate, the dust removal nets, the detection rods, the air speed sensor, the conveying pipe and the communicating pipe, the two dust removal nets are arranged, dust removal work can be alternately carried out, and the dust removal nets can be conveniently replaced without shutdown.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal devices, in particular to a dust removal device for desulfurization and denitrification of furnace flue gas. Background Art

[0002] Desulfurization and denitrification equipment, desulfurization is to remove sulfur dioxide in flue gas, and denitrification is mainly to remove nitrogen oxides in flue gas. These two substances will form acid rain when entering the atmosphere. Acid rain is very harmful to humans, so the country has been advocating environmental protection. Flue gas fueled by coal contains these substances, especially thermal power plants. When building thermal power plants, desulfurization must be built at the same time. When desulfurizing and denitrifying the smoke dust, large particles of impurities in the smoke dust need to be processed to avoid large particles of impurities affecting the treatment effect. Filters are currently used to remove large particles of impurities. When the filter is blocked, it is difficult to detect and clear the blockage in time, which reduces the filtering effect. For this reason, a dust removal device for furnace flue gas desulfurization and denitrification is proposed to solve the above problems. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a dust removal device for desulfurization and denitrification of furnace flue gas, which has the advantages of alternating dust removal and easy maintenance.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions, a technical solution adopted by a dust removal device for desulfurization and denitrification of furnace flue gas: it includes a heat exchange box, the right side of the top of the heat exchange box is connected to a water supply pipe, the inner cavity of the heat exchange box is provided with a flue gas pipe, the rear side of the inner cavity of the heat exchange box is fixedly connected to a temperature sensor, the bottom of the front side of the heat exchange box is connected to a drain pipe, a dust collection box is provided on the right side of the heat exchange box, the other end of the flue gas pipe is connected to a diversion pipe, the front side of the diversion pipe is connected to a purification pipe, the front end of the purification pipe is connected to a blowing pipe, the front side of the surface of the blowing pipe is connected to a nozzle, the inner cavity of the dust collection box is fixedly connected to a partition, a dust collection net is provided between the two partitions, detection rods are fixedly connected to both sides of the inner cavity of the dust collection box, the rear side of the detection rod is fixedly connected to a wind speed sensor, the front side of the dust collection box is connected to a delivery pipe, and the front end of the delivery pipe is connected to a connecting pipe.

[0007] As a preferred solution, a driving motor is fixedly connected to the top of the heat exchange box, and a mixing rod is fixedly connected to the output end of the driving motor.

[0008] As a preferred solution, the flue gas pipes are distributed in a U-shaped pattern in the heat exchange box, and a control valve is connected to the surface of the drain pipe.

[0009] As a preferred solution, the number of the partitions is four, and the four partitions are cross-staggered.

[0010] As a preferred solution, the inner cavity of the partition is provided with an anti-movement groove adapted to the dust removal net, and the surfaces of the purification pipe and the delivery pipe are both connected with automatic control valves.

[0011] As a preferred solution, the number of the purification pipe, the blowing pipe, the dust removal net, the wind speed sensor and the conveying pipe is two each, and the front side of the dust removal box is fixedly connected to a controller.

[0012] As a preferred solution, the top of the dust removal box is movably connected to a rotating rod through a bearing, the top of the rotating rod is fixedly connected to a pressure plate, the surface of the rotating rod is sleeved with a return spring, the bottom of the pressure plate is fixedly connected to a limiting rod, the top of the dust removal net is fixedly connected to a mounting plate, the front side of the top of the dust removal box is fixedly connected to the limiting plate, and the inner cavity of the limiting plate is provided with a limiting groove adapted to the limiting rod.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the utility model provides a dust removal device for desulfurization and denitrification of furnace flue gas, which has the following beneficial effects.

[0015] 1. Through the coordinated use of heat exchange boxes, water supply pipes, flue gas pipes, temperature sensors and drainage pipes, the heat in the flue gas can be recovered and utilized, which not only effectively utilizes resources but also protects dust removal components such as dust removal nets after lowering the flue gas temperature, preventing aging of components caused by high temperature.

[0016] 2. Through the coordinated use of the dust removal box, diversion pipe, purification pipe, blowing pipe, nozzle, partition, dust removal net, detection rod, wind speed sensor, conveying pipe and connecting pipe, and by setting two dust removal nets, dust removal work can be performed alternately, which is convenient for replacing the dust removal net without stopping the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic top view of a cross-sectional view of the dust removal box of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the heat exchange box of the utility model;

[0020] Figure 4 For this utility model Figure 1 Enlarged view of point A in the middle.

[0021] In the figure: 1. Heat exchange box; 2. Water supply pipe; 3. Flue gas pipe; 4. Temperature sensor; 5. Drain pipe; 6. Dust removal box; 7. Diverter pipe; 8. Purification pipe; 9. Blowing pipe; 10. Nozzle; 11. Partition; 12. Dust removal net; 13. Detection rod; 14. Wind speed sensor; 15. Delivery pipe; 16. Connecting pipe; 17. Drive motor; 18. Mixing rod; 19. Control valve; 20. Automatic valve; 21. Controller; 22. Pressure plate; 23. Mounting plate; 24. Limit plate. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] The heat exchange box 1, water supply pipe 2, flue gas pipe 3, temperature sensor 4, drain pipe 5, dust removal box 6, diversion pipe 7, purification pipe 8, blowing pipe 9, nozzle 10, partition 11, dust removal net 12, detection rod 13, wind speed sensor 14, delivery pipe 15, connecting pipe 16, drive motor 17, mixing rod 18, control valve 19, automatic control valve 20, controller 21, pressure plate 22, mounting plate 23 and limit plate 24 components of the present application are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods. Example 1:

[0026] See also Figure 1-4In order to achieve the purpose of cooling the flue gas, this embodiment provides the following technical solutions, which specifically disclose: it includes a heat exchange box 1, a water supply pipe 2 is connected to the right side of the top of the heat exchange box 1, a flue gas pipe 3 is provided in the inner cavity of the heat exchange box 1, a temperature sensor 4 is fixedly connected to the rear side of the inner cavity of the heat exchange box 1, a drive motor 17 is fixedly connected to the top of the heat exchange box 1, and a mixing rod 18 is fixedly connected to the output end of the drive motor 17. The flue gas pipe 3 is distributed in a mouth shape in the heat exchange box 1, and a control valve 19 is connected to the surface of the drain pipe 5. External flue gas enters the flue gas pipe 3, and the flue gas pipe 3 forms a heat exchange with the medium in the heat exchange box 1 to cool the flue gas. During the heat exchange process, the drive motor 17 drives the mixing rod 18 to rotate, and the mixing rod 18 makes the medium flow continuously, so that the medium is heated evenly. When the medium temperature reaches a preset value, the control valve 19 on the surface of the drain pipe 5 is opened to discharge the heated medium outward. Example 2:

[0027] See also Figure 1-4In order to achieve the purpose of alternating dust removal, this embodiment provides the following technical solutions, which specifically disclose: a dust removal box 6 is provided on the right side of the heat exchange box 1, the other end of the flue gas pipe 3 is connected to a diversion pipe 7, the front side of the diversion pipe 7 is connected to a purification pipe 8, the front end of the purification pipe 8 is connected to a blowing pipe 9, the front side of the surface of the blowing pipe 9 is connected to a nozzle 10, the inner cavity of the dust removal box 6 is fixedly connected to a partition 11, a dust removal net 12 is provided between the two partitions 11, both sides of the inner cavity of the dust removal box 6 are fixedly connected to a detection rod 13, the rear side of the detection rod 13 is fixedly connected to a wind speed sensor 14, the front side of the dust removal box 6 is connected to a delivery pipe 15, and the delivery pipe 1 5 is connected to the front end of the connecting pipe 16, the number of partitions 11 is four, and the four partitions 11 are cross-staggered. The inner cavity of the partition 11 is provided with an anti-movement groove adapted to the dust removal net 12. The surfaces of the purification pipe 8 and the delivery pipe 15 are connected with an automatic control valve 20. The purification pipe 8, the blowing pipe 9, the dust removal net 12, the wind speed sensor 14 and the delivery pipe 15 are two in number. The front side of the dust removal box 6 is fixedly connected to the controller 21. The top of the dust removal box 6 is movably connected to the rotating rod through the bearing. The top of the rotating rod is fixedly connected to the pressure plate 22. The surface of the rotating rod is provided with a reset spring. The bottom of the pressure plate 22 is fixedly connected to the limit rod. The dust removal net The top of 12 is fixedly connected with a mounting plate 23, the front side of the top of the dust removal box 6 is fixedly connected with a limit plate 24, the inner cavity of the limit plate 24 is provided with a limit groove adapted to the limit rod, the flue gas after heat exchange and cooling enters the diversion pipe 7 through the flue gas pipe 3, first open the automatic control valve 20 on the surface of the left purification pipe 8, the flue gas is blown to the dust removal net 12 on the left through the blowing pipe 9 and the nozzle 10 on the left, the dust removal net 12 on the left filters the impurities in the flue gas, and the external negative pressure fan sucks the purified flue gas out through the delivery pipe 15 and the connecting pipe 16. During the purification process, the wind speed sensor 14 detects the air flow rate. When the air flow rate decreases, it means that the left There are many impurities sticking to the surface of the side dust removal net 12, which affects the filtering effect. At this time, close the automatic control valve 20 on the surface of the left purification pipe 8, open the automatic control valve 20 on the surface of the right purification pipe 8, repeat the above steps to purify the flue gas, and then deflect the pressure plate 22 to one side to make the limit rod at the bottom of the pressure plate 22 disengage from the corresponding limit groove, and then lift the left mounting plate 23 upward. The mounting plate 23 will bring the left dust removal net 12 upward, and reinsert the new dust removal net 12 into the anti-movement groove of the left partition 11. Under the reset action of the reset spring, the limit rod is driven to reinsert into the limit groove of the limit plate 24 to complete the replacement of the dust removal net 12.

[0028] The working principle of the present invention is as follows: external flue gas enters the flue gas pipe 3, and the flue gas pipe 3 forms a heat exchange with the medium in the heat exchange box 1 to cool the flue gas. During the heat exchange process, the driving motor 17 drives the mixing rod 18 to rotate. The mixing rod 18 makes the medium flow continuously and heats the medium evenly. When the temperature of the medium reaches the preset value, the control valve 19 on the surface of the drain pipe 5 is opened to discharge the heated medium outward. The flue gas cooled by heat exchange enters the diversion pipe 7 through the flue gas pipe 3. The automatic control valve 20 on the surface of the left purification pipe 8 is opened first. The flue gas is blown to the dust removal net 12 on the left through the blowing pipe 9 and the nozzle 10 on the left. The dust removal net 12 on the left filters the impurities in the flue gas. The external negative pressure fan passes the conveying pipe 15 and the connecting pipe 16 to discharge the purified medium. The flue gas is sucked out, and the wind speed sensor 14 detects the air flow rate during the purification process. When the air flow rate decreases, it means that there are more impurities sticking to the surface of the left dust removal net 12, which affects the filtering effect. At this time, close the automatic control valve 20 on the surface of the left purification pipe 8, open the automatic control valve 20 on the surface of the right purification pipe 8, repeat the above steps to purify the flue gas, and then the pressure plate 22 can be deflected to one side to make the limit rod at the bottom of the pressure plate 22 disengage from the corresponding limit groove, and then the left mounting plate 23 can be lifted up, and the mounting plate 23 will bring the left dust removal net 12 upward, and the new dust removal net 12 will be reinserted into the anti-movement groove of the left partition 11. Under the reset action of the reset spring, the limit rod is driven to be reinserted into the limit groove of the limit plate 24 to complete the replacement of the dust removal net 12.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A dust removal device for desulfurization and denitrification of furnace flue gas, comprising a heat exchange box (1), characterized in that: The right side of the top of the heat exchange box (1) is connected to a water supply pipe (2), the inner cavity of the heat exchange box (1) is provided with a flue gas pipe (3), the rear side of the inner cavity of the heat exchange box (1) is fixedly connected to a temperature sensor (4), the bottom of the front side of the heat exchange box (1) is connected to a drain pipe (5), the right side of the heat exchange box (1) is provided with a dust removal box (6), the other end of the flue gas pipe (3) is connected to a diversion pipe (7), the front side of the diversion pipe (7) is connected to a purification pipe (8), the front end of the purification pipe (8) is connected to A blowing pipe (9) is provided, and the front side of the surface of the blowing pipe (9) is connected to a nozzle (10); the inner cavity of the dust removal box (6) is fixedly connected to a partition (11), and a dust removal net (12) is provided between the two partitions (11); both sides of the inner cavity of the dust removal box (6) are fixedly connected to detection rods (13), and the rear side of the detection rod (13) is fixedly connected to a wind speed sensor (14); the front side of the dust removal box (6) is connected to a delivery pipe (15), and the front end of the delivery pipe (15) is connected to a connecting pipe (16).

2. A dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The top of the heat exchange box (1) is fixedly connected to a drive motor (17), and the output end of the drive motor (17) is fixedly connected to a mixing rod (18).

3. The dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The flue gas pipe (3) is distributed in a U-shaped pattern in the heat exchange box (1), and a control valve (19) is connected to the surface of the drain pipe (5).

4. The dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The number of the partitions (11) is four, and the four partitions (11) are cross-staggered in design.

5. The dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The inner cavity of the partition (11) is provided with an anti-movement groove adapted to the dust removal net (12), and the surfaces of the purification pipe (8) and the delivery pipe (15) are both connected to an automatic control valve (20).

6. The dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The number of the purification pipe (8), the blowing pipe (9), the dust removal net (12), the wind speed sensor (14) and the conveying pipe (15) is two, and the front side of the dust removal box (6) is fixedly connected to a controller (21).

7. The dust removal device for desulfurization and denitrification of furnace flue gas according to claim 1, characterized in that: The top of the dust removal box (6) is movably connected to a rotating rod through a bearing, the top of the rotating rod is fixedly connected to a pressure plate (22), the surface of the rotating rod is provided with a return spring, the bottom of the pressure plate (22) is fixedly connected to a limiting rod, the top of the dust removal net (12) is fixedly connected to a mounting plate (23), the front side of the top of the dust removal box (6) is fixedly connected to a limiting plate (24), and the inner cavity of the limiting plate (24) is provided with a limiting groove adapted to the limiting rod.

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