Environment-friendly anti-rotation dust removal device for iron-making blast furnace

Abstract

The utility model relates to the technical field of dust removal of iron-making blast furnaces, and particularly discloses an environment-friendly anti-swirling dust removal device for an iron-making blast furnace, which comprises a shell and an anti-swirling structure, the anti-swirling structure is provided with a column casing and a conical cylinder, and a limiting ring is embedded in the column casing, so that the limiting ring is divided into two gas channels, namely a resistance groove and a gas inlet groove; according to the device, the speed of the deswirling airflow at the bottom of the conical cylinder can be continuously reduced, so that the deswirling airflow can take out the airflow without particles, the probability of a swirling phenomenon is reduced, meanwhile, the particles brought up by the deswirling airflow can be blocked, and stable separation of the airflow is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal for iron-making blast furnaces, in particular to an environmentally friendly anti-swirl dust removal device for iron-making blast furnaces. Background Art

[0002] During the production process of iron-making blast furnaces, the coal gas contains a large amount of solid particles, such as coal powder and slag. If these particles are discharged into the atmosphere, they will cause serious pollution to the environment and endanger people's health. Therefore, the main function of the environmentally friendly dust removal device for iron-making blast furnaces is to separate these solid particles from the coal gas and meet emission standards to protect the environment and people's health.

[0003] At present, the environmentally friendly dust removal device used in iron-making blast furnaces mainly separates these particles from the gas flow through the effects of centrifugal force and gravity. However, when the dust collector rotates in the opposite direction to transport the gas flow after the particles are separated, some particles at the bottom that have not completely fallen may be rolled up again, causing a swirling phenomenon. Utility Model Content

[0004] The purpose of the utility model is to solve the problem of swirl phenomenon that is easy to occur in the prior art, and to propose an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace, comprising a shell and an anti-swirl device;

[0007] The anti-rotation device is arranged inside the housing;

[0008] Wherein, an outlet pipe is arranged above the shell and an air inlet is arranged on the side; and the anti-rotation device is arranged below the air inlet.

[0009] The anti-rotation device includes a cone, a column, and a fixing rod;

[0010] The two ends of the fixing rod are respectively connected to the bottom of the cone and the shell to fix the position of the cone;

[0011] The conical cylinder and the cylindrical cylinder are coaxially arranged, and a gap is provided between the two to form an air inlet groove.

[0012] The column is in the shape of a hollow cylinder, and a resistance groove is provided in the middle of the inner wall. The resistance groove includes an arc-shaped upper wall and a straight side wall. The arc-shaped upper wall is connected to the straight side wall, and the arc-shaped upper wall intersects with the inner wall of the column. The straight side wall is connected to the lower surface of the column through an arc-shaped chamfer.

[0013] Furthermore, a restriction ring is provided in the resistance groove, and the restriction ring is fixed to the resistance groove by connecting the restriction ring through a connecting block, so that there is a gap between the restriction ring and the resistance groove, thereby dividing the restriction ring into two channels. The gas in the resistance groove collides and decelerates, and after merging into the air inlet groove, it can also decelerate the gas in the air inlet groove.

[0014] The upper part of the cone is conical, the middle part is cylindrical, and the lower part is in the shape of an inverted truncated cone. The cylindrical middle part of the cone is located above the column, and the diameter of the lower surface of the cylindrical middle part of the cone is larger than the inner diameter of the column, which has the effect of suppressing and decelerating particulate matter during reverse rotation; the conical upper part of the cone prevents part of the airflow from impacting the cone during the downward process, causing dust in the airflow to accumulate above the cone.

[0015] The diameter of the lower surface of the cylindrical middle portion of the cone is larger than the diameter of the upper surface of the inverted truncated cone-shaped bottom portion of the cone, thereby blocking the gas swirling in the air inlet groove.

[0016] Preferably, the fixing rods are distributed equidistantly in a circular array.

[0017] Preferably, the connecting blocks are distributed equidistantly in a circular array.

[0018] Preferably, the upper surface of the restriction ring is arc-shaped, and the lower surface is inclined and tilted downward toward the column side to block particles brought up by the counter-rotating airflow.

[0019] Preferably, the linear side wall of the resistance groove is inclined and tilted downward toward the cone side, thereby decelerating the bottom rotation.

[0020] Furthermore, the upper surface of the column is inclined and tilted downward toward the cone, so that when rotating forward, the falling particles can be accelerated, and when rotating backward, the particles at the bottom can be blocked and decelerated.

[0021] Preferably, the angle between the upper surface of the column and the central axis of the column is between 40 and 50 degrees.

[0022] Preferably, the bottom angle of the cone is rounded.

[0023] The housing includes a cyclone, a limiting block, a filter element, and a bottom collecting hopper;

[0024] The bottom collecting hopper is fixedly connected to the bottom of the cyclone; the limiting block is a circular ring structure, installed inside the cyclone and above the air inlet; the filter element is fixedly connected to the inner side of the limiting block, and works together with the limiting block to prevent particles from flowing out.

[0025] Furthermore, the shell is fixed by a fixing frame.

[0026] Preferably, a connecting ring is fixedly connected to the bottom of the bottom collecting hopper.

[0027] Compared with the prior art, the present invention provides an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace, which has the following beneficial effects:

[0028] 1. The environmentally friendly anti-swirl dust removal device for iron-making blast furnaces provided by the present invention can continuously decelerate the anti-swirl airflow at the bottom of the cone by providing a specially shaped cone and column, so that the anti-swirl airflow can carry out the airflow after it is separated from the particulate matter, reducing the probability of the swirl phenomenon and improving the efficiency of dust removal.

[0029] 2. The environmentally friendly anti-swirl dust removal device for iron-making blast furnaces provided by the present invention is provided with a column and a restriction ring, so that particles can fall quickly. At the same time, it can further block the particles brought up by the counter-swirling airflow to ensure the stable separation of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace proposed in the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace proposed in the utility model;

[0032] Figure 3 This is a schematic diagram of an anti-swirl device for an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace proposed in the utility model;

[0033] Figure 4 This is a cross-sectional schematic diagram of an anti-swirl device of an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace proposed by the utility model;

[0034] In the figure: 1. Cyclone; 2. Fixing frame; 3. Outlet pipe; 4. Air inlet; 5. Limiting block; 6. Filter element; 7. Cone; 8. Column; 9. Fixing rod; 10. Bottom collecting hopper; 11. Connecting ring; 12. Limiting ring; 13. Resistance groove; 14. Connecting block; 15. Air inlet groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0037] Example 1

[0038] like Figure 1 、 2 The figures show an environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace and a schematic diagram of the internal structure of a cyclone. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace comprises a housing and an anti-swirl device, which is disposed within the housing. The housing comprises a cyclone 1, a limiting block 5, a filter element 6, and a bottom collecting hopper 10. The anti-swirl device comprises a cone 7, a column 8, and a fixing rod 9. The housing is fixedly connected to the outer surface of the cyclone 1 via a fixing bracket 2. An outlet pipe 3 is provided above the housing, and an air inlet 4 is provided on the side of the housing. The anti-swirl device is disposed below the air inlet 4. The bottom collecting hopper 10 is fixedly connected to the bottom of the cyclone 1; the bottom of the bottom collecting hopper 10 is fixedly connected to a connecting ring 11; the limiting block 5 is a circular ring structure, installed on the inside of the cyclone 1, above the air inlet 4; the filter element 6 is fixedly connected to the inside of the limiting block 5, and works together with the limiting block 5 to block the particulate matter in the gas flow when the reverse-rotating gas flow escapes through the outlet pipe 3, preventing these particulate matter from being discharged and polluting the environment. The column 8 is fixed to the inside of the cyclone 1; the cone 7 is coaxially arranged with the column 8, and is connected to the bottom collecting hopper 10 by a fixing rod 9 and fixed to the inside of the column 8 to ensure the stability of the cone 7 when in use. The fixing rods 9 are evenly distributed in a circular array.

[0039] like Figure 3 、 4 The figure shows an anti-swirl device of an environmentally friendly anti-swirl dust removal device for an iron-making blast furnace and its cross-sectional schematic diagram. The column 8 is a hollow cylindrical shape, and a resistance groove 13 is provided in the middle of the inner wall. The resistance groove 13 includes an arc-shaped upper wall and a straight side wall. The arc-shaped upper wall is connected to the straight side wall, and the arc-shaped upper wall intersects with the inner wall of the column 8. The straight side wall is connected to the lower surface of the column 8 by an arc-shaped chamfer.

[0040] The upper surface of the column 8 is inclined and tilted downward toward the cone 7. The angle between the upper surface of the column 8 and the central axis of the column is 42 degrees. During forward rotation, the falling particles can be accelerated, and during reverse rotation, the particles at the bottom can be blocked and decelerated, greatly improving the convenience of using the equipment.

[0041] The linear sidewall of the resistance groove 13 is inclined and tilted downward toward the cone 7 , thereby decelerating the bottom swirl of the coal gas flow.

[0042] The cone 7 and the column 8 are coaxially arranged with a gap therebetween to form an air inlet groove 15 ; when in use, the air inlet groove 15 can be used in conjunction with the column 8 to allow falling particles to fall quickly.

[0043] Furthermore, a restriction ring 12 is provided inside the resistance groove 13. The restriction ring 12 is connected to the resistance groove 13 by a connecting block 14 for fixing, so that a gap exists between the restriction ring 12 and the resistance groove 13. The connecting blocks 14 are evenly distributed in a circular array. The upper surface of the restriction ring 12 is arc-shaped, and the lower surface is inclined, and is inclined downward toward the column 8 to block particulate matter brought up by the counter-rotating airflow. The restriction ring 12 divides into two channels, wherein the gas flow entering the resistance groove 13 collides and decelerates in the resistance groove 13, and after merging into the air inlet groove 15, it also decelerates the gas flow in the air inlet groove 15.

[0044] The cone 7 has a conical upper portion, a cylindrical middle portion, and an inverted truncated cone lower portion. The cylindrical middle portion of the cone 7 is located above the column 8, and the diameter of the lower surface of the cylindrical middle portion of the cone 7 is larger than the inner diameter of the column 8, thereby suppressing and slowing down particles during reverse rotation. The diameter of the lower surface of the cylindrical middle portion of the cone 7 is larger than the diameter of the upper surface of the inverted truncated cone-shaped bottom portion of the cone 7, thereby also suppressing and slowing down particles during reverse rotation.

[0045] The bottom corner of the cone 7 is rounded.

[0046] In the present invention, when in use, the gas flow enters the interior of the cyclone 1 through the air inlet 4 and rotates inside the cyclone 1. During the rotation, some particles directly enter the bottom collecting hopper 10 through the air inlet groove 15 between the column 8 and the cone 7, and then are separated and collected. As the gas flow continues to downward, the flow rate of the gas flow continues to decrease, causing the particles to continue to fall, and the particles can be quickly separated through the inclined surface of the upper surface of the column 8; after most of the particles in the gas flow are separated, when the reverse rotation is performed, the straight side wall of the resistance groove 13 is inclined downward toward the cone 7 side, and is connected to the lower surface of the column 8 through an arc-shaped chamfer, so that the lower part of the inner wall of the column 8 is convex, which can preliminarily restrict the particles at the bottom. At the same time, the presence of the resistance groove 13 will cause the reverse rotating airflow to bend and slow down, and collide with the airflow passing through the air inlet groove 15, so that the airflow is further decelerated, further reducing the probability of the vortex phenomenon.

[0047] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace, characterized in that: It includes a housing and an anti-rotation device; the anti-rotation device is arranged inside the housing; An outlet pipe (3) is provided above the shell, and an air inlet (4) is provided on the side; the anti-rotation device is provided below the air inlet (4); The anti-rotation device comprises a cone (7), a column (8), and a fixing rod (9); The two ends of the fixing rod (9) are respectively connected to the bottom of the cone (7) and the shell; The conical cylinder (7) and the cylindrical cylinder (8) are coaxially arranged, and a gap exists between the two to form an air inlet groove (15); The column (8) is in the shape of a hollow cylinder, and a resistance groove (13) is provided in the middle of the inner wall. The resistance groove (13) includes an arc-shaped upper wall and a straight side wall. The arc-shaped upper wall is connected to the straight side wall, and the arc-shaped upper wall intersects with the inner wall of the column (8). The straight side wall is connected to the lower surface of the column (8) through an arc-shaped chamfer. A restriction ring (12) is provided in the resistance groove (13), and the restriction ring (12) is connected to the resistance groove (13) via a connecting block (14) for fixation, so that a gap exists between the restriction ring (12) and the resistance groove (13).

2. The environmentally friendly anti-swirl dust removal device for ironmaking blast furnace according to claim 1, characterized in that: The upper portion of the cone (7) is conical, the middle portion is cylindrical, and the lower portion is in the shape of an inverted truncated cone. The cylindrical middle portion of the cone (7) is located above the column (8), and the outer diameter of the cylindrical middle portion of the cone (7) is greater than the inner diameter of the column (8).

3. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 2, characterized in that: The diameter of the lower surface of the cylindrical middle portion of the cone (7) is greater than the diameter of the upper surface of the inverted truncated cone-shaped bottom portion of the cone (7).

4. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The upper surface of the restriction ring (12) is in an arc shape; The lower surface of the restriction ring (12) is inclined and tilted downward toward the column (8).

5. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The upper surface of the column (8) is inclined and tilts downward toward the cone (7); The angle between the upper surface of the column (8) and the central axis of the column (8) is between 40 and 50 degrees.

6. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The linear side wall of the resistance groove (13) is inclined and slopes downward toward the cone (7).

7. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The housing comprises a cyclone (1), a limiting block (5), a filter element (6), and a bottom collecting hopper (10); The bottom collecting hopper (10) is fixedly connected to the bottom of the cyclone (1); the limiting block (5) is a circular ring structure, installed inside the cyclone (1) and above the air inlet (4); the filter element (6) is fixedly connected to the inner side of the limiting block (5).

8. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The fixing rods (9) are distributed equidistantly in a circular array; The connecting blocks (14) are distributed equidistantly in a ring array.

9. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 1, characterized in that: The bottom corner of the cone (7) is rounded.

10. The environmentally friendly anti-swirl dust removal device for an ironmaking blast furnace according to claim 7, characterized in that: The housing is fixed by a fixing frame (2); A connecting ring (11) is fixedly connected to the bottom of the bottom collecting hopper (10).

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