Inlet airflow guiding device of blast furnace gas dust removal box body

Abstract

The utility model relates to the technical field of blast furnace gas dust removal, in particular to a blast furnace gas dust removal box inlet airflow guide device which comprises a dust removal box body, a dust suction port and an ash outlet, the upper half portion of the dust removal box body is a cylindrical section, the lower half portion of the dust removal box body is a conical section, and the ash outlet is communicated with the top of the dust removal box body. A supporting plate is fixedly connected in the dust removal box main body, a plurality of filter bags for filtering light dust are arranged below the supporting plate, a guide pipe penetrates through the left side of the dust removal box main body, one end of the guide pipe is communicated with a coal gas conveying pipe, and valves are arranged on one side of the dust outlet and one side of the coal gas conveying pipe. Dust in blast furnace gas is discharged more easily through the arc-shaped guide device arranged in the dust removal box main body, and the moisture degree of the lower half part of the dust removal box main body is reduced through the moisture-proof device arranged below the guide device, so that the dust discharge effect is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace gas dust removal, in particular to an inlet airflow guide device for a blast furnace gas dust removal box. Background Art

[0002] At present, blast furnaces in iron-making plants are gradually becoming larger. The combustible gas produced as a by-product in the blast furnace iron-making process is blast furnace gas. Since blast furnace gas contains a large amount of smoke dust, dust removal boxes are usually equipped to filter the smoke dust. The common ways for gas to enter dust removal boxes on the market are mostly horizontal entry or dispersed entry using guide grilles.

[0003] The requirements of high oxygen enrichment and high utilization coefficient of blast furnaces result in low blast furnace top temperature and high moisture content in coal gas. The dust removal box in the downstream process is difficult to discharge ash due to humidity, especially in winter when the temperature drops. The blast furnace is loaded with inventory and the temperature is even lower, which has a serious impact on the downstream process. Therefore, a blast furnace gas dust removal box inlet airflow guide device is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide an airflow guide device for the inlet of a blast furnace gas dust removal box to solve the problem of difficulty in dust discharge caused by moisture in the dust removal box.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The ash outlet and the dust collecting box of claim 1, wherein the dust collecting box has a bottom surface and a bottom surface. The dust collecting box has a bottom surface and a bottom surface. The dust collecting box has a bottom surface and a bottom surface.

[0007] Preferably, one end of the dust suction port is connected to a dust suction element, and one end of the ash outlet is connected to a coal ash collection unit.

[0008] Preferably, the guide pipe is an arc-shaped curved pipe, and the outlet of the guide pipe faces away from the filter bag and directly downward.

[0009] Preferably, a sealing sleeve is tightly fitted on the outer side of the guide tube, and the other side of the sealing sleeve is fixedly connected to the dust removal box body.

[0010] Preferably, a wear-resistant lining layer is fixedly connected to the inner side of the guide tube, and the wear-resistant lining layer is composed of ceramic blocks.

[0011] Preferably, the connecting pipe is fixedly connected to the dust removal box body, a moisture-proof bag is tightly fitted in the connecting pipe, and the moisture-proof bag is filled with solid desiccant.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In the utility model, the blast furnace gas is transmitted from the gas delivery pipe to the guide pipe through the provided dust collecting box body, dust suction port, ash outlet, filter bag, support plate, gas delivery pipe, guide pipe and valve. Since the blast furnace gas is corrosive and the gas carries dust through quickly, it will produce strong scouring. A wear-resistant lining layer in the form of ceramic blocks is provided in the guide pipe to protect the inner wall of the guide pipe from being easily damaged. The gas goes out from the outlet directly below the guide pipe and will not be immediately attracted by the dust suction port. Large particles of impurities and moist ash blocks in the gas fall to the ash outlet. The dust suction port performs preliminary separation on light dust, thereby reducing the workload of the filter bag and extending the service life of the filter bag. The outlet end of the guide pipe is inclined downward toward the ash outlet. The gas airflow direction is consistent with the ash discharge direction. At the same time, when the gas delivery pipe is conveying ash, the airflow direction The impact force is generated in the ash discharge direction to assist the ash discharge, so that the dust box body can discharge the coal ash in the box to the maximum extent. Especially in the current situation where the top temperature of blast furnaces is generally low and the ash discharge is difficult due to the high moisture content of coal gas, the airflow is guided to avoid the difficulty of ash discharge from the dust box body. The sealing sleeve is arranged on the outside of the guide pipe to increase the sealing performance of the dust box body. The filter screen, connecting pipe, moisture-proof bag and solid desiccant are arranged to make the lower half of the dust box body dry and reduce its humidity, so that the ash discharge is smoother. The user removes the bolts in turn through the rotating disk, fixing sleeve, bolts and handles, leaving the bottom one. At this time, the rotating disk is rotated by holding the handle, and then the moisture-proof bag is taken out for replacement, so as to achieve the purpose of replacing the solid desiccant that has been used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of the dust removal box of the utility model from top view;

[0016] Figure 3 This is a schematic diagram of the installation structure of the rotating disk of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the guide tube of the utility model.

[0018] In the figure: 1. Dust removal box body; 2. Dust suction port; 3. Ash outlet; 4. Filter bag; 5. Support plate; 6. Gas delivery pipe; 7. Guide pipe; 8. Valve; 9. Sealing sleeve; 10. Filter screen; 11. Connecting pipe; 12. Rotating plate; 13. Fixed sleeve; 14. Bolt; 15. Handle; 16. Moisture-proof bag; 17. Solid desiccant; 18. Wear-resistant lining layer. DETAILED DESCRIPTION

[0019] 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A blast furnace gas dust removal box inlet airflow guide device comprises a dust removal box body 1, a dust suction port 2 and an ash outlet 3. The dust removal box body 1, which is arranged in a columnar section at the upper half and a conical section at the lower half, is connected to the ash outlet 3 at the bottom, and is connected to the dust suction port 2 at the top of the dust removal box body 1. A support plate 5 is fixedly connected inside the dust removal box body 1, and a plurality of filter bags 4 for filtering light dust are arranged below the support plate 5. A guide pipe 7 runs through the left side of the dust removal box body 1, and one end of the guide pipe 7 is connected to a gas delivery pipe 6. A valve 8 is arranged on one side of the ash outlet 3 and the gas delivery pipe 6. The dust removal box body 1 arranged in a conical section A filter screen 10 is fixedly connected inside, a connecting pipe 11 is provided in front of the filter screen 10, a fixing sleeve 13 is fixedly connected in front of the connecting pipe 11, a rotating disk 12 is tightly fitted in front of the fixing sleeve 13, a bolt 14 consisting of a threaded rod and a nut penetrates through the rotating disk 12, and a handle 15 with a spherical top is fixedly connected in front of the rotating disk 12. By means of an arc-shaped guide device provided in the dust removal box body 1, dust in the blast furnace gas is easier to discharge, and by means of a moisture-proof device provided below the guide device, the moisture level of the lower half of the dust removal box body 1 is reduced, thereby further enhancing the dust discharge effect.

[0024] One end of the dust suction port 2 is connected to a dust suction element, and one end of the ash outlet 3 is connected to a coal ash collection unit, which is convenient for the ash discharge of the dust removal box body 1; the guide pipe 7 is an arc-shaped curved pipe, and the outlet of the guide pipe 7 is facing away from the filter bag 4 and directly downward, so that light dust can be sucked into the dust suction element and has a filtering effect when passing through the filter bag 4; a sealing sleeve 9 is tightly fitted on the outside of the guide pipe 7, and the other side of the sealing sleeve 9 is fixedly connected to the dust removal box body 1 to increase the sealing of the dust removal box body 1; a wear-resistant lining layer 18 is fixedly connected to the inside of the guide pipe 7, and the wear-resistant lining layer 18 is composed of ceramic blocks to protect the inner wall of the guide pipe 7 from being easily damaged; the connecting pipe 11 is fixedly connected to the dust removal box body 1, and a moisture-proof bag 16 is tightly fitted in the connecting pipe 11, and the moisture-proof bag 16 is filled with solid desiccant 17 to reduce the humidity of the lower half of the dust removal box body 1 and enhance the ash discharge effect.

[0025] Working process: When the inlet airflow guide device of the blast furnace gas dust removal box is in use, the valve 8 at the gas delivery pipe 6 and the valve 8 at the ash outlet 3 are opened, and the blast furnace gas generated in the blast furnace ironmaking production process is transmitted to the guide pipe 7 through the gas delivery pipe 6. The wear-resistant lining layer 18 arranged in the form of ceramic blocks is provided in the guide pipe 7 to protect the inner wall of the guide pipe 7 from being easily damaged by the scouring force of the dust carried in the gas. After the blast furnace gas goes out from the outlet directly below the guide pipe 7, it will not be sucked. Due to the attraction of the dust port 2, large particles of impurities and wet ash blocks contained in the blast furnace gas fall to the ash outlet 3 connected to the gas collection unit under the action of gravity. When falling, the dust port 2 connected to the dust suction element sucks out the light dust contained in the blast furnace gas, and the light dust is filtered when passing through the filter bag 4. After filtering, the light dust is sucked out from the dust suction port 2. Since the guide pipe 7 is an arc-shaped curved pipe and the outlet faces directly downward, the impact of the airflow on the filter bag 4 when entering the dust removal box body 1 is reduced, and the service life of the filter bag 4 is extended. The filter screen 10, the connecting pipe 11, the moisture-proof bag 16 and the solid desiccant 17 are arranged on the conical dust removal box body 1, so that the lower half of the dust removal box body 1 has a drying effect, reduces its humidity, and makes the dust discharge smoother. When the solid desiccant 17 needs to be replaced after long-term use, the user removes the bolts 14 consisting of threaded rods and nuts passing through the rotating disk 12 in sequence, retains the bottom bolt 14 and rotates it in the loosening direction, and then rotates the rotating disk 12 by holding the handle 15, takes out the moisture-proof bag 16 containing the solid desiccant 17 in the connecting pipe 11, replaces it as a whole, and places the new solid desiccant 17 and the moisture-proof bag 16 in the connecting pipe 11, rotates the rotating disk 12 in the opposite direction, and fixes the bolts 14 in sequence. The arc-shaped guide device is arranged in the dust removal box body 1, so that the dust in the blast furnace gas is easier to discharge. The moisture-proof device arranged below the guide device reduces the humidity of the lower half of the dust removal box body 1, and further enhances the dust discharge effect.

[0026] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0027] 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 blast furnace gas dust removal box inlet airflow guide device, comprising a dust removal box body (1), a dust suction port (2) and an ash outlet (3), characterized in that: The dust box body (1) is provided with a columnar upper section and a conical lower section, the bottom of which is connected to an ash outlet (3), the top of which is connected to a dust suction port (2), a support plate (5) is fixedly connected inside the dust box body (1), a plurality of filter bags (4) for filtering light dust are provided below the support plate (5), a guide pipe (7) passes through the left side of the dust box body (1), one end of the guide pipe (7) is connected to a gas delivery pipe (6), the ash outlet (3) and the gas delivery pipe (6) are connected to each other. ) are provided with a valve (8) on one side, a filter screen (10) is fixedly connected inside the dust removal box body (1) which is arranged in a conical section, a connecting pipe (11) is arranged in front of the filter screen (10), a fixing sleeve (13) is fixedly connected in front of the connecting pipe (11), a rotating disk (12) is tightly fitted in front of the fixing sleeve (13), a bolt (14) composed of a threaded rod and a nut passes through the rotating disk (12), and a handle (15) with a spherical top is fixedly connected in front of the rotating disk (12).

2. The blast furnace gas dust removal box inlet airflow guide device according to claim 1, characterized in that: One end of the dust suction port (2) is connected to a dust suction element, and one end of the ash outlet (3) is connected to a coal ash collection unit.

3. The blast furnace gas dust removal box inlet airflow guide device according to claim 1, characterized in that: The guide pipe (7) is an arc-shaped curved pipe, and the outlet of the guide pipe (7) faces away from the filter bag (4) and directly downward.

4. The blast furnace gas dust removal box inlet airflow guide device according to claim 1, characterized in that: A sealing sleeve (9) is tightly fitted on the outside of the guide tube (7), and the other side of the sealing sleeve (9) is fixedly connected to the dust removal box body (1).

5. The blast furnace gas dust removal box inlet airflow guide device according to claim 1, characterized in that: A wear-resistant lining layer (18) is fixedly connected to the inner side of the guide tube (7), and the wear-resistant lining layer (18) is composed of ceramic blocks.

6. The airflow guide device for the inlet of a blast furnace gas dust removal box according to claim 1, characterized in that: The connecting pipe (11) is fixedly connected to the dust removal box body (1), a moisture-proof bag (16) is tightly fitted inside the connecting pipe (11), and the moisture-proof bag (16) is filled with a solid desiccant (17).

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