Dust removal structure and blast furnace feeding device

Abstract

The utility model relates to the field of blast furnace dust removal, and discloses a dust removal structure and a blast furnace feeding device, the dust removal structure comprises a dust removal assembly, the dust removal assembly comprises a dust removal box, an air pipe fixed in the dust removal box in a penetrating manner, a plugging plate arranged on the outer side of the dust removal box and a partition plate mounted in the dust removal box; the blast furnace dust removal device has the advantages that due to the arrangement of the dust removal box, when water gas and dust in a blast furnace are sucked through the suction pipe, a mixture of the water gas and the dust can be prevented from being adsorbed on the inner walls of the suction pipe and the inlet through cooperation of the partition plate and the gas pipe, and it is ensured that a large amount of mixture of the water gas and the dust can reach the bottom of the dust removal box; the suction pipe and the inlet cannot be blocked, and normal operation of the device is ensured.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace dust removal, and in particular to a dust removal structure and a blast furnace charging device. Background Technology

[0002] Dust collection in the charging hopper is a crucial process in the blast furnace charging system. After the furnace charge is transported from the main conveyor belt to the hopper, it passes through the upper gate valve → charging hopper (including the upper airtight valve) → lower valve box (including the lower gate valve and lower airtight valve) → distributor → into the furnace. The charging hopper is primarily used for weighing and transferring the furnace charge. The upper gate valve, upper sealing valve, lower gate valve, and lower sealing valve are installed at the upper and lower ends of the charging hopper, respectively. They serve to both isolate the furnace charge and seal the high-pressure gas. By sequentially opening and closing the upper sealing valve, lower sealing valve, pressure equalization valve, and pressure equalization venting valve, the charging hopper is pressurized and equalized with the furnace pressure, allowing the furnace charge to enter the furnace while maintaining high-pressure production in the blast furnace.

[0003] In existing technology, the lower outlet of the hopper and the upper inlet of the receiving tank (between the upper gate valve and the upper sealing valve) are connected to the suction pipe via a flexible connection. When the tank receives material, since the lower sealing valve and the vent valve are both closed, there is a medium exchange between the furnace charge and the water gas in the tank. The water gas in the tank is drawn into negative pressure through the suction pipe to ensure smooth material flow. Current problems include: the easy combination of furnace charge dust and water gas to form slurry, leading to blockage of the suction pipe, accumulation of furnace charge particles, damage to the flexible connection, gas leakage, uneven material flow, and inaccurate weighing, directly affecting furnace operation; and the issue of medium exchange between the furnace charge and the water gas in the tank, which hinders the smooth extraction of water gas and dust from the blast furnace. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is: because furnace charge dust and water gas easily combine to form mud, the suction pipe becomes blocked, furnace charge particles accumulate, causing problems such as damage to soft connections, gas leakage, uneven material flow, and inaccurate weighing.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a dust removal structure, which includes a dust removal component. The dust removal component includes a dust removal box, an air pipe that penetrates and is fixed inside the dust removal box, a sealing plate that is disposed on the outside of the dust removal box, and a partition that is installed inside the dust removal box.

[0006] In a preferred embodiment of the dust removal structure of this utility model: a suction pipe and an inlet are provided on the top outer side of the dust removal box, the suction pipe and the inlet are separated by a partition, an outlet is provided at the bottom of the dust removal box, the outlet is fixedly connected to the sealing plate by bolts, and the diameter of the inlet is smaller than the diameter of the suction pipe.

[0007] In a preferred embodiment of the dust removal structure of this utility model: the air pipe is fixed on the dust removal box, and the outer ring of one end of the air pipe inside the dust removal box is attached to the inner bottom side of the inlet.

[0008] In a preferred embodiment of the dust removal structure of this utility model: the partition is fixedly installed inside the dust removal box, and the partition is close to the inlet, and the partition is elastic.

[0009] In a preferred embodiment of the dust removal structure of this utility model: a keyway is provided on the part of the partition that overlaps with the air pipe, and the keyway is adapted to the air pipe.

[0010] In a preferred embodiment of the dust removal structure of this utility model: a baffle is provided at the top of the outer ring of the air pipe.

[0011] In a preferred embodiment of the dust removal structure of this utility model: the baffle gradually rises from the direction close to the partition to the direction far away from the partition.

[0012] In a preferred embodiment of the dust removal structure of this utility model: a fixing plate is also fixedly connected inside the dust removal box, and the fixing plate is located on the side of the partition away from the inlet.

[0013] In a preferred embodiment of the dust removal structure of this utility model: the fixing plate gradually approaches the partition from top to bottom, and the fixing plate is fixedly connected to the air pipe.

[0014] The beneficial effects of this utility model are as follows: When the dust collector is set up, the water gas and dust in the blast furnace are sucked out through the suction pipe. Through the cooperation of the baffle and the gas pipe, the mixture of water gas and dust can be prevented from adsorbing on the inner wall of the suction pipe and the inlet, ensuring that a large amount of water gas and dust mixture can reach the bottom of the dust collector without clogging the suction pipe and the inlet, thus ensuring the normal operation of the device.

[0015] Therefore, the technical problem to be solved by this utility model is: to ensure the smooth extraction of water gas and dust in the blast furnace, and to address the issue of medium replacement between the furnace charge and the water gas in the charging tank.

[0016] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a blast furnace charging device, which includes a blast furnace unit. The blast furnace unit includes, from top to bottom, a charging section, a hopper, a charging gate, a charging tank, a discharging gate, a valve box, a chute transmission gear, and a blast furnace body. The charging gate is fixedly connected to the inlet.

[0017] The beneficial effects of this utility model are as follows: by connecting the charging gate with the inlet, it can work with the dust removal box to achieve better exchange between the furnace charge and the water and gas medium in the charging tank, ensuring smooth furnace charge flow. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0019] Figure 1 A schematic diagram of the dust removal structure is shown;

[0020] Figure 2 A cross-sectional schematic diagram of the dust removal structure is shown;

[0021] Figure 3 It shows Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 A schematic diagram of the dust removal structure is shown in front view and cross section.

[0023] Figure 5 A schematic diagram of the dust removal structure and blast furnace charging device is shown.

[0024] Figure 6 It shows Figure 5 A magnified structural diagram at point B in the middle. Detailed Implementation

[0025] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0027] Example 1

[0028] Reference Figures 1-4 This is the first embodiment of the present utility model. This embodiment provides a dust removal structure, which includes a dust removal component 1. The dust removal component 1 includes a dust removal box 11, an air pipe 12 that penetrates and is fixed inside the dust removal box 11, a sealing plate 13 disposed on the outside of the dust removal box 11, and a partition 14 installed inside the dust removal box 11.

[0029] The dust collector 11 is designed to store the mixture of water gas and dust when the material tank 24 is being pumped. During the pumping process, the mixture of water gas and dust will adhere to the inlet 112 after contact. The mixture adhering to the inlet 112 can be blown away through the gas pipe 12, and impurities floating into the gas pipe 12 can also be cleaned out during the blowing process. The mixture blown away through the gas pipe 12 will return to the material tank 24 for blast furnace combustion.

[0030] Specifically, a suction pipe 111 and an inlet 112 are provided on the top outer side of the dust collection box 11. The suction pipe 111 and the inlet 112 are separated by a partition 14. A discharge port 113 is provided at the bottom of the dust collection box 11. The discharge port 113 is fixedly connected to the sealing plate 13 by bolts. The diameter of the inlet 112 is smaller than the diameter of the suction pipe 111.

[0031] The suction pipe 111 is connected to the external suction system and is used to suction the gas in the dust collector 11, so that a negative pressure is generated inside the dust collector 11. This removes water gas and dust from the material tank 24, ensuring that the material in the hopper 22 falls smoothly into the material tank 24. The sealing plate 13 is designed to facilitate the removal of the mixture at the bottom of the dust collector 11 by the staff, preventing the mixture in the dust collector 11 from accumulating too much and causing malfunctions in the suction process.

[0032] The partition 14 serves as a barrier. When water gas and dust enter the dust collector 11, they first hit the partition 14 and then fall. During the fall, the water gas and dust come into contact, increasing the distance they travel and allowing the water gas and dust to mix thoroughly. The mixture then falls heavily to the bottom of the dust collector 11 due to suction, greatly reducing the amount of dust during suction.

[0033] The diameter of the inlet 112 is smaller than that of the suction pipe 111. When the suction pipe 111 draws with the same suction force, the smaller diameter of the inlet 112 accelerates the airflow. The high-speed airflow helps to quickly move water gas, dust and mixtures to the bottom of the dust collector 11, reducing their residence time in the collector and reducing the possibility of secondary re-entrainment.

[0034] Specifically, the air pipe 12 is fixed to the dust collection box 11, and the outer ring of the end of the air pipe 12 inside the dust collection box 11 is attached to the inner bottom side of the inlet 112.

[0035] When the air pipe 12 passes through the dust collector 11, there is a fixed relationship between the air pipe 12 and the dust collector 11, which can fix the air pipe 12 in this position and ensure the stability of the air pipe 12. Furthermore, one end of the air pipe 12 is in contact with the inlet 112, which can also provide support for the air pipe 12. The air pipe 12 can blow away the mixture on the inner wall of the inlet 112 to prevent blockage at the inlet 112.

[0036] As the mixture enters the dust collector 11 through the inlet 112, some of it will enter the air pipe 12. Since no suction is generated inside the air pipe 12 when it is not in operation, the mixture in the air pipe 12 will be blown out when the air pipe 12 is turned on, and it will not affect the air pipe 12.

[0037] Since the pressure ejected from the air pipe 12 is greater than the suction force of the inlet 112, the airflow ejected from the air pipe 12 can clean the inlet 112 without causing any impact. The mixture from the purging enters the material tank 24 and will be reused without causing any adverse effects on the overall device.

[0038] An electric ball valve, pressure reducing valve, etc. can be installed at one end of the air pipe 12 located outside the dust collection box 11. The air pipe 12 can be controlled by the PLC master station to control the time node of the blowing, so that it is synchronized with the loading rhythm. It can also be used in conjunction with the feeding gate 23 in the PLC control system. The time node can also be modified manually. It has the advantages of flexible, precise and highly operable operation.

[0039] Furthermore, the inlet of the trachea 12 can be set with an inclined angle, and the bottom of the trachea 12 is flush with the inlet 112. It can have an upward bending angle, so that the gas can be sprayed at a certain angle to achieve purging of the center. Alternatively, the inlet of the trachea 12 can be set as a trumpet shape, so that the sprayed gas can diffuse over a wide range and purge the mixture in the inlet 112 over a wide area.

[0040] During use, the suction effect of the suction pipe 111 creates a negative pressure inside the dust collector 11, causing the water gas and dust in the material tank 24 to flow into the dust collector 11. During this flow, some of the mixture adheres to the inner wall of the inlet 112. A large amount of water gas, dust, and mixture impacts the baffle 14 and falls to the bottom of the dust collector 11. During the falling process, a large amount of mixture and dust moves towards the bottom at a relatively fast speed. After falling to the bottom, the gas enters the suction pipe 111. After a set time, the PLC main station controls the air pipe 12 to purge, ensuring that the inlet 112 remains unobstructed.

[0041] Example 2

[0042] Reference Figures 1-4 This is the second embodiment of the present invention, which differs from the first embodiment in that it also includes a partition 14 fixedly installed inside the dust collection box 11, and the partition 14 is close to the inlet 112 and the partition 14 is elastic.

[0043] Furthermore, a keyway 141 is provided on the part of the partition 14 that overlaps with the air pipe 12, and the keyway 141 is adapted to the air pipe 12.

[0044] The top of the partition 14 is fixed to the top of the dust collector 11 near the inlet 112, which restricts the movement space of water gas, dust and mixture after entering the dust collector 11, and prevents the dust from spreading over a large area, thereby improving the dust removal efficiency. The specific installation position is set according to the actual situation.

[0045] The partition 14 is elastic. When water gas, dust and mixtures impact the partition 14, the partition 14 can bend to a certain extent. The keyway 141 is set in an elongated oval shape so that the partition 14 can swing smoothly.

[0046] Specifically, a stop 121 is provided at the top of the outer ring of the trachea 12.

[0047] Furthermore, the stop 121 gradually rises in the direction from near the partition 14 to away from the partition 14.

[0048] When the partition 14 remains vertical, the upper wall of the keyway 141 is in contact with the air pipe 12. When the partition 14 swings, the upper wall of the keyway 141 gradually moves away from the air pipe 12. Therefore, the stop block 121 gradually becomes higher from the partition 14 outward, so that when the partition 14 swings, it can have a small collision with the top of the stop block 121. However, due to the elasticity of the partition 14 itself, it will not affect the partition 14 from returning to its original position.

[0049] When water gas, dust, and mixtures impact the baffle 14, some of the mixture remains on the surface of the baffle 14. Over time, this accumulation results in a large amount of mixture remaining at the outlet of the inlet 112, affecting the spray space of the inlet 112 and thus impacting the dust removal efficiency. When the baffle 14 contacts and impacts the baffle 121, the baffle 14 vibrates due to the impact of the water gas, dust, and mixtures, as well as the impact between the baffle 14 and the baffle 121, shaking off most of the mixture from the surface of the baffle 14. This ensures the space between the baffle 14 and the inlet 112, thus ensuring the dust removal efficiency.

[0050] When in use, when the baffle 14 is impacted by water gas, dust and mixture, the baffle 14 bends and collides with the block 121. At this time, the baffle 14 shakes, which will shake off the mixture adhering to the baffle 14, ensuring dust removal efficiency.

[0051] Example 3

[0052] Reference Figures 1-4 This is the third embodiment of the present invention. This embodiment is based on the first two embodiments. This embodiment also includes a fixing plate 15 fixedly connected inside the dust collection box 11. The fixing plate 15 is located on the side of the partition 14 away from the inlet 112.

[0053] Furthermore, the fixing plate 15 gradually approaches the partition 14 from top to bottom, and the fixing plate 15 is fixedly connected to the air pipe 12.

[0054] The fixed plate 15 provides a stable support point for the air tube 12, ensuring its stability. At the same time, the fixed plate 15 can limit the offset of the partition 14, preventing the partition 14 from deforming due to excessive offset angle. Furthermore, the impact between the partition 14 and the fixed plate 15 can also cause the partition 14 to vibrate, further ensuring that the residual mixture on the partition 14 is shaken off.

[0055] The inclined setting of the fixing plate 15 can also prevent its surface from being contaminated with more impurities. When the partition 14 collides with the fixing plate 15, it can also cause the mixture on the surface of the fixing plate 15 to fall off.

[0056] Example 4

[0057] Reference Figures 5-6 This is the fourth embodiment of the present invention. This embodiment is based on the previous three embodiments. This embodiment provides a blast furnace charging device, which includes a blast furnace unit 2. The blast furnace unit 2 includes, from top to bottom, a charging section 21, a hopper 22, a charging gate 23, a material tank 24, a discharging gate 25, a valve box 26, a chute transmission gear 27, and a blast furnace body 28. The charging gate 23 is fixedly connected to the inlet 112.

[0058] During operation, blast furnace charging is divided into two steps: 1. Receiving material through charging gate 23: All material enters charging section 21 → open the charging tank to release pressure and then close it back → open the upper sealing valve to the designated position → open the upper gate valve to the designated position and close it back (receiving material complete). 2. Charging inside the furnace: close the upper sealing valve to the designated position → open the equalizing valve of the charging tank to pressurize and then close it back (equalizing pressure with the furnace) → open the lower sealing valve to the designated position (the furnace charge is replaced by the water and gas medium in the furnace, charging is complete) → close the lower gate valve → close the lower sealing valve to the designated position (entering the next cycle).

[0059] In summary, when using the blast furnace unit 2, the receiving of materials and the absorption of water gas and dust under negative pressure are carried out normally, following the steps in Example 2.

[0060] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A dust removal structure, characterized in that: include, Dust removal assembly (1), the dust removal assembly (1) includes a dust removal box (11), an air pipe (12) that passes through and is fixed inside the dust removal box (11), a sealing plate (13) that is disposed on the outside of the dust removal box (11), and a partition plate (14) installed inside the dust removal box (11). The dust collector (11) is provided with a suction pipe (111) and an inlet (112) on the top outer side. The suction pipe (111) and the inlet (112) are separated by a partition (14). The dust collector (11) is provided with a discharge port (113) at the bottom. The discharge port (113) is fixedly connected to the sealing plate (13) by bolts. The diameter of the inlet (112) is smaller than the diameter of the suction pipe (111).

2. The dust removal structure according to claim 1, characterized in that: The air pipe (12) is fixed on the dust collector (11), and the outer ring of the air pipe (12) inside the dust collector (11) is attached to the inner bottom side of the inlet (112).

3. The dust removal structure according to claim 2, characterized in that: The partition (14) is fixedly installed inside the dust collector (11) and is close to the inlet (112). The partition (14) is elastic.

4. The dust removal structure according to claim 3, characterized in that: The portion of the partition (14) that overlaps with the air pipe (12) is provided with a keyway (141), which is adapted to the air pipe (12).

5. The dust removal structure according to claim 4, characterized in that: A stop (121) is provided at the top of the outer ring of the trachea (12).

6. The dust removal structure according to claim 5, characterized in that: The stop (121) gradually rises from the direction close to the partition (14) to the direction away from the partition (14).

7. The dust removal structure according to claim 6, characterized in that: The dust collector (11) is also fixedly connected to a fixing plate (15), which is located on the side of the partition (14) away from the inlet (112).

8. The dust removal structure according to claim 7, characterized in that: The fixing plate (15) gradually approaches the partition (14) from top to bottom, and the fixing plate (15) is fixedly connected to the air pipe (12).

9. A blast furnace charging device, characterized in that: Including the dust removal structure as described in any one of claims 1 to 8, and The blast furnace unit (2) includes, from top to bottom, a charging section (21), a hopper (22), a charging gate (23), a charging tank (24), a discharging gate (25), a valve box (26), a chute transmission gear (27), and a blast furnace body (28). The charging gate (23) is fixedly connected to the inlet (112).

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