Smoke dust cooling system of submerged arc furnace

Abstract

The utility model discloses a submerged arc furnace smoke dust cooling system which comprises a cooling dust removal assembly, and the cooling dust removal assembly comprises a dust removal box, a water inlet pipe, a filter plate, a first spraying pipe, a first spraying head, a cooling box, a second spraying pipe, a conveying pipe, a second spraying head, a rotating rod, an air distribution plate and a pushing blade. And one side of the dust removal box communicates with the bottom end of the cooling box through a connecting pipe. Dust impurities in flue gas can be filtered through the filter plate, a water source is input into the first spraying pipe through the water inlet pipe, the first spraying pipe is in contact with the flue gas while the filter plate is flushed, first dust removal and cooling of the flue gas are achieved at the moment, the cooling and dust removal effects on the flue gas are improved under the cooperation of the pushing blade and the rotating rod, and the dust removal effect of the flue gas is improved. Compared with the prior art, by arranging the filter plate, the air distribution plate and other structures, the flue gas cooling and dedusting device achieves two times of cooling and dedusting operation on the flue gas, and improves the cooling and dedusting effects.

Description

Technical Field

[0001] The utility model relates to a cooling system, in particular to a dust cooling system for submerged arc furnace, belonging to the technical field of dust cooling. Background Technique

[0002] The submerged arc furnace is a high-temperature device, and its main raw materials are ore and reducing agent. After the raw materials enter the furnace, a reduction reaction occurs at the high temperature of the molten pool, generating high-temperature dust-containing combustible gases including CO, CH4, and H2. These gases are collectively referred to as furnace gas, also known as flue gas. The temperature of the flue gas is high and it contains a large amount of dust, so a flue gas dust removal and cooling system is connected to the flue pipe of the submerged arc furnace;

[0003] It is known that the Chinese publicly authorized patent (Publication No.: CN204329654U) discloses a structure of a sedimentation and cooling chamber for the top flue gas of a submerged arc furnace. By setting structures such as a sedimentation chamber, a heat insulation layer, an operation door, a cooling water spraying device, and a wind door, it can cool and remove dust from the flue gas in the sedimentation chamber by using water mist and external cold air;

[0004] Although it realizes the cooling and dust removal of the flue gas, it only removes dust through water mist, lacks the filtration of the flue gas, and the dust removal effect is poor. Moreover, it lacks a air distribution structure, and it is difficult for the flue gas and water mist to contact evenly, and the cooling effect is also poor. Therefore, a dust cooling system for submerged arc furnace is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a dust cooling system for submerged arc furnace to solve one of the problems raised in the above background technique.

[0006] The utility model is implemented by the following technical solution: A dust cooling system for submerged arc furnace includes a cooling and dust removal component. The cooling and dust removal component includes a dust removal box, a water inlet pipe, a filter plate, a first spray pipe, a first spray head, a cooling box, a second spray pipe, a conveying pipe, a second spray head, a rotating rod, a air distribution plate, and a pushing blade;

[0007] One side of the dust removal box is communicated with the bottom end of the cooling box through a connecting pipe. The filter plates are fixedly connected to the inner side wall of the dust removal box at equal intervals. The water inlet pipe is fixedly connected and communicated with the first spray pipe. The first spray heads are installed on the lower surface of the first spray pipe at equal intervals. One side of the first spray pipe is attached to one side of the filter plate. The air distribution plate is fixedly connected to the lower part of the inner side wall of the cooling box. The second spray pipe is fixedly connected to the top end of the rotating rod. The pushing blade is fixedly connected to the bottom of the outer side wall of the rotating rod. One end of the conveying pipe is rotatably connected and communicated with the second spray pipe. The second spray heads are installed on the lower surface of the second spray pipe at equal intervals.

[0008] As a further preference of this technical solution: The conveying pipe is installed inside the cooling box, the first spray pipe is installed on the inner top wall of the dust removal box, and the water inlet pipe is installed inside the dust removal box.

[0009] As a further preference of this technical solution: The pushing blade is located below the air distribution plate, the rotating rod is rotatably connected inside the cooling box, and air distribution holes are evenly formed inside the air distribution plate.

[0010] As a further preference of this technical solution: A smoke exhaust pipe is installed at the top end of the cooling box.

[0011] As a further preference of this technical solution: A wire mesh demister is installed at the top of the inner side wall of the cooling box, and the wire mesh demister is located above the second spray pipe.

[0012] As a further preference of this technical solution: A second sewage pipe is installed on one side of the lower surface of the cooling box.

[0013] As a further preference of this technical solution: A first sewage pipe is installed on one side of the lower surface of the dust removal box.

[0014] As a further preference of this technical solution: A smoke inlet pipe is installed on the side of the dust removal box away from the cooling box.

[0015] Advantages of the present utility model: The present utility model can filter dust impurities in the flue gas through the filter plate. Water source is input into the first spray pipe through the water inlet pipe. While flushing the filter plate, the water source contacts with the flue gas, and at this time, the first dust removal and cooling of the flue gas are realized. Then the flue gas flows into the cooling box. Under the cooperation of the pushing blade and the rotating rod, the second spray pipe rotates to spray water mist, and the water mist fully contacts with the flue gas. At the same time, under the action of the air distribution plate, the flue gas flows evenly upward and fully contacts with the water mist, thereby improving the cooling and dust removal effects of the flue gas and realizing the second dust removal and cooling of the flue gas. Compared with the prior art, the present utility model realizes two cooling and dust removal operations on the flue gas by setting structures such as a filter plate and an air distribution plate, and improves the cooling and dust removal effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a structural schematic diagram of the present utility model;

[0018] Figure 2 Structural schematic diagram of the dust removal box of the present utility model;

[0019] Figure 3 Schematic diagram of the connection between the first spray pipe and the first spray head of the present utility model;

[0020] Figure 4 Structural schematic diagram of the air distribution plate of the present utility model;

[0021] Figure 5 Structural schematic diagram of the cooling box of the present utility model.

[0022] In the figure: 101, cooling and dust removal assembly; 11, dust removal box; 12, water inlet pipe; 13, filter plate; 14, first spray pipe; 15, first spray head; 16, cooling box; 17, second spray pipe; 18, conveying pipe; 19, second spray head; 20, rotating rod; 21, air distribution plate; 22, pushing blade; 24, wire mesh demister; 25, smoke exhaust pipe; 31, first sewage discharge pipe; 32, second sewage discharge pipe; 33, smoke inlet pipe. Specific embodiments

[0023] 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.

[0024] Embodiment

[0025] Please refer to Figures 1 - 5 , the present utility model provides a technical solution: a submerged arc furnace dust cooling system, including a cooling and dust removal assembly 101, and the cooling and dust removal assembly 101 includes a dust removal box 11, a water inlet pipe 12, a filter plate 13, a first spray pipe 14, a first spray head 15, a cooling box 16, a second spray pipe 17, a conveying pipe 18, a second spray head 19, a rotating rod 20, an air distribution plate 21 and a pushing blade 22;

[0026] One side of the dust removal box 11 is communicated with the bottom end of the cooling box 16 through a connecting pipe, the filter plate 13 is fixedly connected to the inner side wall of the dust removal box 11 at equal intervals, the water inlet pipe 12 is fixedly connected and communicated with the first spray pipe 14, the first spray heads 15 are installed on the lower surface of the first spray pipe 14 at equal intervals, one side of the first spray pipe 14 is attached to one side of the filter plate 13, the air distribution plate 21 is fixedly connected to the lower part of the inner side wall of the cooling box 16, the second spray pipe 17 is fixedly connected to the top end of the rotating rod 20, the pushing blade 22 is fixedly connected to the bottom of the outer side wall of the rotating rod 20, one end of the conveying pipe 18 is rotatably connected and communicated with the second spray pipe 17, and the second spray heads 19 are installed on the lower surface of the second spray pipe 17 at equal intervals;

[0027] The cooling and dust removal assembly 101 is used to cool down and remove dust from the off-gas of the submerged arc furnace. When the off-gas enters the dust removal box 11, the first cooling and dust removal of the off-gas is carried out, with dust removal being the main focus at this time. When the off-gas enters the cooling box 16, the second cooling and dust removal of the off-gas is carried out, with cooling being the main focus at this time.

[0028] In this embodiment, specifically: The conveying pipe 18 is installed inside the cooling box 16, the first spray pipe 14 is installed on the inner top wall of the dust removal box 11, and the water inlet pipe 12 is installed inside the dust removal box 11. Water source is input into the first spray pipe 14 through the water inlet pipe 12. Under the action of the first nozzle 15, the water source is sprayed onto the surface of the filter plate 13, thereby flushing the filter plate 13 to prevent the filter holes of the filter plate 13 from being blocked.

[0029] In this embodiment, specifically: The pushing blade 22 is located below the air distribution plate 21, the rotating rod 20 is rotatably connected inside the cooling box 16, and air distribution holes are evenly formed inside the air distribution plate 21. Thus, when the off-gas enters the cooling box 16, the off-gas pushes the pushing blade 22, the pushing blade 22 drives the rotating rod 20 to rotate, and the rotating rod 20 drives the second spray pipe 17. Therefore, the second spray pipe 17 can be rotated to spray water mist, so that the water mist fully contacts the off-gas, and the off-gas flows evenly upward after passing through the air distribution plate 21 and fully contacts the water mist, thereby improving the cooling and dust removal effects on the off-gas.

[0030] In this embodiment, specifically: A smoke exhaust pipe 25 is installed at the top end of the cooling box 16, and the off-gas after cooling and dust removal can be discharged through the smoke exhaust pipe 25.

[0031] In this embodiment, specifically: A wire mesh demister 24 is installed at the top of the inner side wall of the cooling box 16. The wire mesh demister 24 is located above the second spray pipe 17. The water droplets in the off-gas after cooling and dust removal can be adsorbed through the wire mesh demister 24 to prevent the water droplets from being discharged through the smoke exhaust pipe 25.

[0032] In this embodiment, specifically: A second sewage discharge pipe 32 is installed on one side of the lower surface of the cooling box 16. Thus, the water source sprayed by the second spray pipe 17 can be discharged through the second sewage discharge pipe 32.

[0033] In this embodiment, specifically: A first sewage discharge pipe 31 is installed on one side of the lower surface of the dust removal box 11. Thus, the water source sprayed by the first spray pipe 14 can be discharged through the first sewage discharge pipe 31.

[0034] In this embodiment, specifically: A smoke inlet pipe 33 is installed on one side of the dust removal box 11 away from the cooling box 16. Thus, the off-gas discharged from the submerged arc furnace can flow into the dust removal box 11 through the smoke inlet pipe 33.

[0035] Working principle or structural principle. During use, the flue gas discharged from the submerged arc furnace flows into the dust removal box 11 through the smoke inlet pipe 33. The flue gas containing dust contacts the filter plate 13, and the dust impurities in the flue gas can be filtered through the filter plate 13. Water source is input into the first spray pipe 14 through the water inlet pipe 12. Under the action of the first spray head 15, the water source is sprayed onto the surface of the filter plate 13, thereby flushing the filter plate 13 to avoid clogging of the filter holes of the filter plate 13. At the same time, the water source contacts the flue gas, and at this time, the first dust removal and temperature reduction of the flue gas are achieved;

[0036] Then the flue gas flows into the temperature reduction box 16. When the flue gas flows, it pushes the pushing blades 22. The pushing blades 22 drive the rotating rod 20 to rotate, and the rotating rod 20 drives the second spray pipe 17, so that the second spray pipe 17 can rotate and spray water mist, enabling the water mist to fully contact the flue gas. The flue gas flows evenly upward after passing through the air distribution plate 21 and fully contacts the water mist, thereby improving the temperature reduction and dust removal effects of the flue gas and achieving the second dust removal and temperature reduction of the flue gas. After the dust removal and temperature reduction, the flue gas passes through the wire mesh demister 24 and is discharged through the exhaust pipe 25.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A submerged arc furnace dust cooling system, characterized in that: The cooling and dust removal component (101) comprises a dust removal box (11), a water inlet pipe (12), a filter plate (13), a first spray pipe (14), a first nozzle (15), a cooling box (16), a second spray pipe (17), a delivery pipe (18), a second nozzle (19), a rotating rod (20), an air distribution plate (21) and a push blade (22); One side of the dust removal box (11) is connected to the bottom end of the cooling box (16) through a connecting pipe, the filter plate (13) is equidistantly fixedly connected to the inner wall of the dust removal box (11), the water inlet pipe (12) is fixedly connected to and connected with the first spray pipe (14), the first spray head (15) is equidistantly installed on the lower surface of the first spray pipe (14), one side of the first spray pipe (14) is attached to one side of the filter plate (13), the air distribution plate (21) is fixedly connected to the lower part of the inner wall of the cooling box (16), the second spray pipe (17) is fixedly connected to the top end of the rotating rod (20), the pushing blade (22) is fixedly connected to the bottom of the outer wall of the rotating rod (20), one end of the conveying pipe (18) is rotatably connected to and connected with the second spray pipe (17), and the second spray head (19) is equidistantly installed on the lower surface of the second spray pipe (17).

2. The submerged arc furnace dust cooling system according to claim 1, characterized in that: The delivery pipe (18) is installed inside the cooling box (16), the first spray pipe (14) is installed on the inner top wall of the dust removal box (11), and the water inlet pipe (12) is installed inside the dust removal box (11).

3. The submerged arc furnace dust cooling system according to claim 2, characterized in that: The push blade (22) is located below the air distribution plate (21), the rotating rod (20) is rotatably connected to the inside of the cooling box (16), and the inside of the air distribution plate (21) is evenly provided with air distribution holes.

4. The submerged arc furnace dust cooling system according to claim 3, characterized in that: A smoke exhaust pipe (25) is installed at the top end of the cooling box (16).

5. The submerged arc furnace dust cooling system according to claim 4, characterized in that: A wire mesh demister (24) is installed on the top of the inner wall of the cooling box (16), and the wire mesh demister (24) is located above the second spray pipe (17).

6. The submerged arc furnace dust cooling system according to claim 5, characterized in that: A second sewage pipe (32) is installed on one side of the lower surface of the cooling box (16).

7. The submerged arc furnace dust cooling system according to claim 6, characterized in that: A first sewage discharge pipe (31) is installed on one side of the lower surface of the dust removal box (11).

8. The submerged arc furnace dust cooling system according to claim 7, characterized in that: A smoke inlet pipe (33) is installed on a side of the dust removal box (11) away from the cooling box (16).

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