Dust removal system for treating moisture-containing and dust-containing flue gas

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By designing a dust removal system with multiple dust reduction and dehumidification treatment, the existing dust removal box is prone to dust bonding and blockage, achieving more efficient dust removal and dehumidification effects, and extending the service life of the filler.

CN222567238UActive Publication Date: 2025-03-07LIAONING DEHONG CONSTR ENG TECH CO LTD

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Patent Information

Application Number: CN202420856956.0
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-24
Publication Date: 2025-03-07
Estimated Expiration: 2034-04-24

AI Technical Summary

Technical Problem

When dealing with damp dust-containing flue gases, existing dust removal boxes are prone to dust bonding, hardening and pipeline blockage, resulting in frequent replacement of dust removal and dehumidification fillers.

Method used

A dust removal system is designed, including a dust removal box, an intake pipe, an outlet pipe, a dust removal and dehumidification filler, a first and second circulation passages, a back plate, a spray rack and a liquid collecting cover. The flue gas dripped through the micropores to perform a first dust reduction, then the second dust reduction is performed on the arc-shaped impact surface, and then the third dust reduction is performed on the water sprayed through the spray rack, and finally the fourth dust reduction and dehumidification are performed at the dust removal and dehumidification filler.

Benefits of technology

Through multiple dust reduction and dehumidification treatment, dust bonding and blockage are significantly reduced, the service life of dust removal and dehumidification fillers is extended, and the dust removal efficiency and system reliability are improved.

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Abstract

The utility model aims to provide a dust removal system for treating wet and dusty flue gas, which comprises a dust removal box, a gas inlet pipeline and a gas outlet pipeline, the gas inlet pipeline and the gas outlet pipeline are connected to the dust removal box, and the interior of the dust removal box is divided into a first circulation channel and a second circulation channel by a first partition plate in the flue gas flowing direction. A back plate is arranged at the communication position of the first circulation channel and the second circulation channel. Flue gas flowing in the first circulation channel flows into the second circulation channel after making contact with the back plate, and a liquid collecting cover is arranged at the bottom of the dust removal and dehumidification filler. The utility model relates to the technical field of industrial dust removal, in the dust removal system, after flue gas enters the dust removal system, the flue gas can be subjected to primary dust removal through water dripping from micropores; the flue gas collides with the back plate during circulation, and secondary dust falling is carried out; when the smoke dust continues to circulate, the smoke dust makes contact with primary liquid of water sprayed by the spraying frame, and third dust falling work is carried out; and when the smoke dust continues to circulate, the smoke dust contacts with the dust removal and dehumidification filler to perform fourth dust falling and dehumidification work.

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Description

Technical Field

[0001] The utility model relates to the technical field of industrial dust removal, in particular to a dust removal system for treating wet and dusty flue gas. Background Art

[0002] In the iron ore sintering production process, a primary mixer moistens and mixes the various raw materials after configuration. These raw materials include iron ore powder, fuel, sintered ore, dust ash, quicklime, etc. A large amount of dust is raised when the raw materials are transported; and in the process of adding water and mixing, the quicklime digests with water to release heat and generate a large amount of steam, and the steam will entrain a part of fine particles to form wet dust. The wet dust is mainly discharged from the drum feed port of the mixer. Since the flue gas dust enters the dust removal box for dehumidification and dust reduction treatment before being discharged, and the flue gas dust has high humidity and high viscosity, in the prior art, the wet dust enters the dust removal box and directly contacts with the dust removal and dehumidification filler for dust removal and dehumidification, which causes the smoke to contact all the wet dust at the dust removal and dehumidification filler in the dust removal box, and then it becomes easy to compact and harden. After long-term use, dust adhesion and pipeline blockage are very likely to occur, and the dust removal and dehumidification filler needs to be replaced, otherwise most of the dust removal and dehumidification functions will be lost. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a dust removal system for treating wet and dusty flue gas, which solves the problem that the existing dust removal box has a single dust removal and dehumidification method, which causes the equipment to be easily adhered and blocked by dust.

[0004] To achieve the above-mentioned purpose, the utility model is implemented by the following technical solutions: a dust removal system for treating wet dusty flue gas, the dust removal system comprising a dust removal box and an air inlet duct and an air outlet duct connected to the dust removal box, a dust removal and dehumidification filler is installed at the inner cavity of the dust removal box close to the air outlet duct, a first flow channel and a second flow channel are separated by a first partition along the flue gas flow direction in the dust removal box, and a back plate is provided at the connection between the first flow channel and the second flow channel;

[0005] Wherein, the smoke flowing in the first circulation channel contacts the back plate and flows into the second circulation channel;

[0006] A spray rack is installed on the second circulation channel, and the spray rack is provided with circulation holes for smoke to enter the dust removal and dehumidification filler through the second circulation channel.

[0007] Preferably, the back plate includes an arc-shaped impact surface formed on the surface thereof, so that the smoke flowing in the first circulation channel flows into the second circulation channel along the arc-shaped impact surface.

[0008] Preferably, the arc-shaped impact surface includes an arc-shaped surface portion provided at the bottom and in contact with the first circulation channel and / or the second circulation channel, and a straight surface portion provided on the arc-shaped surface portion, and the straight surface portion and the arc-shaped surface portion have a smooth transition.

[0009] Preferably, the back plate further comprises a plurality of second partitions formed on the arc-shaped impact surface, a plurality of groove portions are separated by the second partitions, and a plurality of protrusion structures are arranged in the groove portions.

[0010] Preferably, the protruding structure comprises a protruding end, and a first curved surface and a second curved surface are formed along the protruding end and extending toward the bottom surface of the groove portion on both sides.

[0011] Preferably, a liquid collecting cover is provided at the bottom of the dust removal and dehumidification filler, and the liquid collecting cover includes a plane portion and a funnel portion;

[0012] The spray rack is fixed on the plane portion, and a third flow channel connected to the liquid collecting cover is formed on the top of the spray rack;

[0013] An overflow hole is formed at the bottom of the funnel portion, and a liquid outlet end of the overflow hole is arranged close to the top of the back plate.

[0014] Preferably, the first partition is located below the spray rack, and the first partition receives the water sprayed by the spray rack and allows the water to drip downward into the first circulation channel.

[0015] Preferably, a grid is installed on the first partition, and a plurality of metal mesh plates are detachably connected to the grid, and a plurality of micro holes are opened on the metal mesh plates for water to drip downwards.

[0016] Beneficial Effects

[0017] By using a dust removal system for treating wet and dusty flue gas provided by the utility model, compared with the prior art, in the dust removal system, after the flue gas enters, it can firstly perform the first dust reduction through the water liquid dripping from the micropores; when the flue gas circulates, it collides with the back plate, at this time, the dust in the flue gas first contacts the back plate, so that most of it is extended and adhered to the back plate, and the second dust reduction is performed; when the flue gas continues to circulate, it contacts the initial water liquid sprayed from the spray rack, and the third dust reduction is performed; when the flue gas continues to circulate, it contacts the dust removal and dehumidification filler, and the fourth dust reduction and dehumidification are performed. At the same time, the water liquid dripping from the dust removal and dehumidification filler can also clean the dust on the back plate, and moisten the surface of the back plate to enhance the adsorption effect of the dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the dust removal box of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the back plate of the utility model;

[0020] Figure 3 For this utility model Figure 2 Sectional view at AA;

[0021] Figure 4 This is a schematic diagram of the first partition structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the grid structure of the utility model.

[0023] Explanation of symbols in the figure

[0024] 1. Air inlet duct, 2. Dust removal box, 3. First partition, 4. First circulation channel, 5. Back plate, 51. Arc impact surface, 51a. Straight surface, 51b. Arc surface, 52. Second partition, 53. Groove portion, 54. Raised structure, 54a. Raised end, 54b. First curved surface, 54c. Second curved surface, 6. Spray rack, 7. Circulation hole, 8. Second circulation channel, 9. Liquid collecting cover, 10. Overflow hole, 11. Dust removal and dehumidification filler, 12. Air outlet duct, 13. Grid, 14. Metal mesh, 15. Micropores, 16. Third circulation channel. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. As long as the effect of the utility model can be exerted, various changes can be made to the implementation scheme.

[0026] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0027] Reference Figure 1-5 A dust removal system for treating wet and dusty flue gas according to the present embodiment is described.

[0028] Embodiment 1, as Figure 1-3 As shown, the dust removal system includes a dust removal box 2 and an air inlet pipe 1 and an air outlet pipe 12 connected to the dust removal box 2. Specifically, the air inlet pipe 1 is connected to the bottom of the side wall of the dust removal box 2, and the air outlet pipe 12 is connected to one side of the top of the dust removal box 2, so that the wet dust-containing flue gas can rise from bottom to top. A dust removal and dehumidification filler 11 is installed in the inner cavity of the dust removal box 2 close to the air outlet pipe 12. The wet dust-containing flue gas contacts the dust removal and dehumidification filler 11 during the rising process to remove water vapor and dust in the flue gas.

[0029] Different from the prior art, a first flow channel 4 and a second flow channel 8 are separated by a first partition plate 3 along the flue gas flow direction in the dust removal box 2, and a back plate 5 is provided at the connecting point of the first flow channel 4 and the second flow channel 8; wherein, the flue gas flowing in the first flow channel 4 contacts the back plate 5 and then flows into the second flow channel 8; the flow direction of the flue gas is affected by the first partition plate 3 and is separated into the first flow channel 4 and the second flow channel 8, thereby extending the flow time of the flue gas, so that the dust in the flue gas can fall or increase the time for being processed.

[0030] The second circulation channel 8 is provided with a spray rack 6, which is provided with a circulation hole 7 for the smoke to enter the dust removal and dehumidification filler 11 through the second circulation channel 8. When the smoke flows into the second circulation channel 8, the water sprayed by the spray rack 6 contacts the dust in the smoke to reduce the dust, and the smoke after the dust reduction continues to move upward through the circulation hole 7 and enters the dust removal and dehumidification filler 11.

[0031] In one embodiment, the back plate 5 includes an arc-shaped impact surface 51 formed on its surface, so that the smoke flowing in the first circulation channel 4 flows into the second circulation channel 8 along the arc-shaped impact surface 51. The surface of the back plate 5 is designed to be arc-shaped, so that the smoke can smoothly enter the second circulation channel 8 through the arc-shaped surface; after entering the second circulation channel 8, the smoke is sprayed by the spray rack 6 to reduce dust.

[0032] The back plate 5 also includes a plurality of second partitions 52 formed on the arc-shaped impact surface 51, and a plurality of grooves 53 are separated by the second partitions 52. A plurality of protruding structures 54 are provided in the grooves 53. It should be explained in detail that the protruding structures 54 include protruding ends 54a, and a first curved surface 54b and a second curved surface 54c are formed along the protruding ends 54a to extend to the bottom surfaces of the grooves 53 on both sides.

[0033] After the smoke enters the dust removal box 2 through the air intake duct 1, it impacts the arc-shaped impact surface 51 of the back plate 5 along the first circulation duct 4. At this time, the dust in the smoke first contacts the back plate 5, so that most of it is extended and adhered to the back plate 5, and most of the dust is processed. As the dust accumulates, it becomes hardened, and because the arc-shaped impact surface 51 is a concave-convex second partition 52 and a groove portion 53, the hardened dust is easier to fall off. The hardened dust in the groove 53 passes through the convex end 54a and the first curved surface 54b and the second curved surface 54c on both sides, so that the dust can naturally fall downward according to the curved surface design of the first curved surface 54b and the second curved surface 54c, and there will be no dead angle that makes it difficult for the hardened dust to fall off.

[0034] Embodiment 2, as Figure 1As shown, the dust removal system includes a dust removal box 2 and an air inlet duct 1 and an air outlet duct 12 connected to the dust removal box 2. A dust removal and dehumidification filler 11 is installed in the inner cavity of the dust removal box 2 close to the air outlet duct 12. A first flow channel 4 and a second flow channel 8 are separated by a first partition 3 in the dust removal box 2 along the flue gas flow direction. A back plate 5 is arranged at the connection between the first flow channel 4 and the second flow channel 8; the back plate 5 includes an arc-shaped impact surface 51 formed on its surface, and the arc-shaped impact surface 51 includes an arc-shaped surface 51b arranged at the bottom and in contact with the first flow channel 4 and / or the second flow channel 8, and a straight surface 51a arranged on the arc-shaped surface 51b, and the straight surface 51a and the arc-shaped surface 51b are smoothly transitioned. The back plate 5 also includes a plurality of second partitions 52 formed on the arc-shaped impact surface 51, and a plurality of grooves 53 are separated by the second partitions 52.

[0035] A liquid collecting cover 9 is arranged at the bottom of the dust removal and dehumidification filler 11, and the liquid collecting cover 9 includes a plane portion and a funnel portion; the spray frame 6 is fixed on the plane portion, and a third flow channel 16 connected to the liquid collecting cover 9 is formed on the top of the spray frame 6; an overflow hole 10 is formed at the bottom of the funnel portion, and the liquid outlet end of the overflow hole 10 is arranged close to the top of the back plate 5. Optionally, the overflow hole 10 is arranged close to the straight surface portion 51a.

[0036] In this embodiment, after the flue gas passes through the spray rack 6 to reduce dust, it enters the dust removal and dehumidification filler 11 through the third circulation channel 16 for dehumidification and dust removal. The moisture condensed on the surface of the dust removal and dehumidification filler 11 forms water droplets and gathers and drips downward, gathering in the liquid collecting cover 9 and flowing out through the overflow hole 10. The flowing liquid falls to the straight surface part 51a, and then slides down along the arc surface part 51b. During the sliding process, it contacts the dust compacted on the back plate 5. The sliding water can slide down with the dust, thereby achieving the purpose of removing the dust on the surface of the back plate 5; and making the surface of the back plate 5 moist, which is easier to adsorb the dust in the flue gas.

[0037] Embodiment three, as Figure 1 , 4 , 5, a dust removal system for treating wet dusty flue gas, the dust removal system comprising a dust removal box 2 and an air inlet duct 1 and an air outlet duct 12 connected to the dust removal box 2, a dust removal and dehumidification filler 11 is installed in the inner cavity of the dust removal box 2 close to the air outlet duct 12, a first flow channel 4 and a second flow channel 8 are separated by a first partition plate 3 in the dust removal box 2 along the flue gas flow direction, and a back plate 5 is provided at the connection between the first flow channel 4 and the second flow channel 8;

[0038] The first partition plate 3 is located below the spray rack 6 , and receives the water sprayed by the spray rack 6 and allows the water to drip downward into the first circulation channel 4 .

[0039] A grid frame 13 is installed on the first partition plate 3, and a plurality of metal mesh plates 14 are detachably connected to the grid frame 13. The metal mesh plates 14 are provided with a plurality of micro holes 15 for water to drip downward.

[0040] When smoke enters the first circulation channel 4 through the air intake duct 1, the first step of spraying and dust reduction is performed through the micropores 15. The water on the micropores 15 comes from the liquid sprayed by the spray rack 6, and the liquid is received and collected by the first partition plate 3. Specifically, the liquid sprayed by the spray rack 6 falls on the metal mesh plate 14 for collection and then drips downward through the micropores 15.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal system for treating wet dusty flue gas, the dust removal system comprising a dust removal box (2) and an air inlet duct (1) and an air outlet duct (12) connected to the dust removal box (2), a dust removal and dehumidification filler (11) being installed in the inner cavity of the dust removal box (2) close to the air outlet duct (12), characterized in that: A first circulation channel (4) and a second circulation channel (8) are separated by a first partition plate (3) along the flue gas flow direction in the dust removal box (2), and a back plate (5) is provided at the connection point between the first circulation channel (4) and the second circulation channel (8); The smoke flowing in the first circulation channel (4) contacts the back plate (5) and then flows into the second circulation channel (8); A spray rack (6) is installed on the second circulation channel (8), and a circulation hole (7) is opened on the spray rack (6) for allowing smoke to enter the dust removal and dehumidification filler (11) through the second circulation channel (8).

2. A dust removal system for treating wet dusty flue gas according to claim 1, characterized in that: The back plate (5) comprises an arc-shaped impact surface (51) formed on its surface, so that the smoke flowing in the first circulation channel (4) flows into the second circulation channel (8) along the arc-shaped impact surface (51).

3. A dust removal system for treating wet dusty flue gas according to claim 2, characterized in that: The arc-shaped impact surface (51) comprises an arc-shaped surface portion (51b) arranged at the bottom and in contact with the first circulation channel (4) and / or the second circulation channel (8), and a straight surface portion (51a) arranged on the arc-shaped surface portion (51b), wherein the straight surface portion (51a) and the arc-shaped surface portion (51b) have a smooth transition.

4. A dust removal system for treating wet dusty flue gas according to claim 2, characterized in that: The back plate (5) further comprises a plurality of second partitions (52) formed on the arc-shaped impact surface (51), a plurality of groove portions (53) are separated by the second partitions (52), and a plurality of protruding structures (54) are arranged in the groove portions (53).

5. A dust removal system for treating wet dusty flue gas according to claim 4, characterized in that: The protruding structure (54) comprises a protruding end (54a), and a first curved surface (54b) and a second curved surface (54c) are formed along the protruding end (54a) and extending toward the bottom surface of the groove portion (53) on both sides.

6. A dust removal system for treating wet dusty flue gas according to claim 1, characterized in that: A liquid collecting cover (9) is provided at the bottom of the dust removal and dehumidification filler (11), and the liquid collecting cover (9) comprises a plane portion and a funnel portion; The spray frame (6) is fixed on the plane portion, and a third flow channel (16) connected to the liquid collecting cover (9) is formed on the top of the spray frame (6); An overflow hole (10) is formed at the bottom of the funnel portion, and a liquid outlet end of the overflow hole (10) is arranged close to the top of the back plate (5).

7. A dust removal system for treating wet dusty flue gas according to claim 1, characterized in that: The first partition plate (3) is located below the spray rack (6), and the first partition plate (3) receives the water sprayed by the spray rack (6) and allows the water to drip downward into the first circulation channel (4).

8. A dust removal system for treating wet dusty flue gas according to claim 7, characterized in that: A grid frame (13) is installed on the first partition plate (3), and a plurality of metal mesh plates (14) are detachably connected to the grid frame (13). The metal mesh plates (14) are provided with a plurality of micro holes (15) for water to drip downwards.