Discharging and dust removing device for ore tank of blast furnace
By designing a combination of unloading trolley, vacuum cover, flexible hose and flow guide in the blast furnace trough unloading device, and using negative pressure and jet pipes to form an air curtain, efficient and accurate dust absorption and dust removal are achieved, solving the problems of dust dissipation and incomplete dust removal.
Patent Information
- Application Number
- CN202422332185.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing blast furnace ore tank unloading device has problems such as dust dissipation and incomplete dust removal during the unloading process. Especially when the unloading cart moves, the dust-induced area changes lead to the inability to accurately absorb the dust cover and the dust removal efficiency is not high.
A dust removal device including a discharge trolley, a vacuum cleaner, a flexible hose, a flow tube and a telescopic tube are designed to generate suction through a negative pressure device to ensure that the dust flows in a relatively closed pipeline, and the flow tube is simultaneously moved when the discharge trolley moves to achieve accurate vacuum cleansing; at the same time, an air curtain is formed through an annular jet pipe to prevent dust from escaping.
Accurate dust absorption and efficient dust removal are achieved. A very small number of dust can also be sucked into the dust absorption cover, which significantly improves the dust removal effect, solving the problem of dust dissipation.
Smart Images
Figure CN223060223U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of blast furnace bunker dust removal, and particularly relates to a blast furnace bunker discharging dust removal device. Background Technique
[0002] In the production process of blast furnace smelting, blast furnace raw materials need to be put into the blast furnace according to the technological process. The blast furnace bunker is an important production facility for supplying blast furnace raw materials. Generally, it consists of 4 - 6 coke bins, 5 - 8 ore bins and 2 - 4 miscellaneous bins. Its main body consists of a feeding device, a discharging device, a bunker silo, a weighing device, a discharging device and corresponding control and automation systems. Among them, a large amount of dust is generated during the discharging process of the discharging device to the discharging port, which is one of the main dust emission points in the blast furnace bunker, and has the characteristics of high emission position, large dust concentration and long emission time, which will cause serious pollution to the blast furnace production area.
[0003] At present, in order to solve the pollution problem of blast furnace bunker discharging, usually a dust suction hood is added at the discharging point, and the dust is adsorbed into the dust collector after being collected. Some enterprises also adopt a fixed dust removal pipeline on the bunker discharging platform, set fixed dust suction ports according to the discharging positions, and the discharging trolley is equipped with a dust removal pipeline docking method for dust suction, which has improved the pollution problem of bunker discharging to a certain extent. However, it is found in the actual use process that there are still the following problems: First, the dust suction hood is located above the discharging trolley, and the material dropping point is located below the discharging trolley. There is inevitably a certain distance between the dust suction hood and the material dropping point. Due to the existence of this distance, in the case of wind blowing or excessive dust, some dust will always escape to the surrounding, resulting in incomplete dust removal and unsatisfactory dust removal effect; Second, since the discharging trolley is often in a moving state during operation, the position of the dust generated by material dropping is also constantly changing, while the dust suction hood is fixed and cannot accurately suck dust at the source of dust escape, so the dust removal efficiency is not high. Therefore, it is objectively necessary to develop a blast furnace bunker discharging dust removal device that can accurately suck dust, has high dust removal efficiency and good dust removal effect. Content of the Utility Model
[0004] The purpose of the utility model is to provide a blast furnace bunker discharging dust removal device that can accurately suck dust, has high dust removal efficiency and good dust removal effect.
[0005] The object of the present utility model is achieved as follows. It includes a discharging platform and a discharging trolley located above the discharging platform. The discharging trolley is in a herringbone structure. The discharging trolley includes a main pipe and two inclined pipes that are connected. The lower end of the inclined pipe is connected with a vertical pipe. A discharging port is processed on the discharging platform below each vertical pipe. The feeding end of the vertical pipe extends into the discharging port. A telescopic pipe is concentrically sleeved on the vertical pipe. A sealing gasket is arranged at the lower end of the telescopic pipe, and a ring plate is arranged at the upper end. A spring is arranged between the ring plate and the sealing gasket. A diversion pipe is concentrically arranged on the ring plate. The lower end of the inclined pipe extends into the interior of the diversion pipe and is hermetically and fixedly connected with the diversion pipe. The upper end of the diversion pipe is connected with a flexible hose. A dust suction hood is arranged above the discharging trolley. The dust suction hood is of a hollow structure. The upper end of the flexible hose is communicated with the cavity of the dust suction hood. A number of dust suction through holes are processed on the lower surface of the dust suction hood. The top of the dust suction hood is connected with a dust suction pipe.
[0006] Furthermore, a telescopic rod is concentrically arranged inside the spring.
[0007] Furthermore, a ring pipe is arranged on the discharging platform outside the discharging trolley. A number of jet pipes are uniformly arranged in a circle on the air pipe. The jet direction of the jet pipe is inclined upwards.
[0008] Furthermore, a maintenance door is arranged on the side surface of the dust suction hood.
[0009] Furthermore, the upper end of the flexible hose and the dust suction hood, and the lower end of the flexible hose and the upper end of the diversion pipe are both connected by flanges.
[0010] Furthermore, a circular curtain is arranged on the outside of the lower end of the dust suction hood. The curtain includes a number of rubber strips arranged vertically in sequence.
[0011] The utility model is used for dust removal during the discharging process of a blast furnace bunker discharging device. When in use, the negative pressure device of the system is started, and negative pressure is generated in the dust suction pipe, dust suction hood, flexible hose, diversion pipe, and telescopic pipe. Suction is generated near the lower port of the telescopic pipe. The discharging trolley slides horizontally along its track, and the raw materials in the discharging trolley fall from two inclined pipes and enter the bunker silo below through the discharging port. At this time, a large amount of dust will be generated and rolled up. These dusts first fly upward through the discharging port, and then enter the annular area between the vertical pipe and the telescopic pipe under the action of suction. Then, they enter the cavity inside the dust suction hood through the diversion pipe and the flexible hose in sequence, and finally are discharged through the dust suction pipe for unified treatment. During the above working process of the utility model, the dust generated by the falling of the raw materials will enter the cavity inside the dust suction hood through the telescopic pipe, vertical pipe, and flexible hose in sequence. Although there is a certain gap between the dust suction hood and the discharging port, the dust is always in a relatively closed pipeline and will not be affected by the wind and cause dispersion. Moreover, due to the action of suction, it can ensure smooth flow into the dust suction hood even when there is a large amount of dust, solving the problem of dust dispersion during the upward flow process, achieving relatively thorough dust removal, and improving the dust removal effect. Secondly, considering that the discharging trolley is often in a moving state during operation, and the main area where dust is generated during the discharging process also moves accordingly. In the utility model, the diversion pipe is fixed on the inclined pipe of the discharging trolley. When the discharging trolley moves, it drives the diversion pipe and the telescopic pipe to move synchronously, so that the lower end of the telescopic pipe is always located at the most dust-concentrated position, treating the source of dust dispersion, thereby realizing precise dust suction and improving the dust removal efficiency. The extremely small amount of dispersed dust will also enter the cavity inside the dust suction hood through the dust suction through holes after flowing upward, having a good dust removal effect. In summary, the utility model has the advantages of being able to precisely suck dust, having high dust removal efficiency, and good dust removal effect. Brief Description of the Drawings
[0012] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0013] In the figure: 1 - discharging platform, 2 - discharging trolley, 3 - main pipe, 4 - inclined pipe, 5 - vertical pipe, 6 - discharging port, 7 - telescopic pipe, 8 - sealing gasket, 9 - ring plate, 10 - spring, 11 - diversion pipe, 12 - flexible hose, 13 - dust suction hood, 14 - dust suction through hole, 15 - dust suction pipe, 16 - telescopic rod, 17 - ring pipe, 18 - inspection door, 19 - flange, 20 - curtain. Detailed Embodiments
[0014] The following further describes the present utility model with reference to the accompanying drawings, but does not limit the present utility model in any way. Any changes or improvements based on the present utility model fall within the protection scope of the present utility model.
[0015] Such as Figure 1As shown in the figure, the utility model includes a discharging platform 1 and a discharging trolley 2 located above the discharging platform 1. The specific structures of the discharging platform 1 and the discharging trolley 2 are prior arts. Generally, a bunker bin is located below the discharging platform 1, and the discharging trolley 2 is located on the discharging platform 1. The discharging trolley 2 can translate along its track. The discharging trolley 2 is used for discharging blast furnace raw materials. The discharging trolley 2 is in a herringbone structure. The discharging trolley 2 includes a main pipe 3 and two inclined pipes 4 that are connected. The lower end of the inclined pipe 4 is connected with a vertical pipe 5. A discharging port 6 is machined on the discharging platform 1 below each vertical pipe 5. The feeding end of the vertical pipe 5 extends into the discharging port 6. A telescopic pipe 7 is concentrically sleeved on the vertical pipe 5. A sealing gasket 8 is arranged at the lower end of the telescopic pipe 7, and a ring plate 9 is arranged at the upper end. A spring 10 is arranged between the ring plate 9 and the sealing gasket 8. A guiding pipe 11 is concentrically arranged on the ring plate 9. The ring plate 9 is fixedly connected with the guiding pipe 11. Under the elastic force of the spring 10, the sealing gasket 8 is pressed tightly on the discharging platform 1 to prevent dust from escaping. The lower end of the inclined pipe 4 extends into the interior of the guiding pipe 11 and is hermetically and fixedly connected with the guiding pipe 11. The upper end of the guiding pipe 11 is connected with a flexible hose 12. A dust suction hood 13 is arranged above the discharging trolley 2. The dust suction hood 13 is of a hollow structure. The upper end of the flexible hose 12 is communicated with the cavity of the dust suction hood 13. A plurality of dust suction through holes 14 are machined on the lower surface of the dust suction hood 13. The top of the dust suction hood 13 is connected with a dust suction pipe 15. The dust suction pipe 15 is a prior art and is connected with a negative pressure device such as a system induced draft fan to generate suction force.
[0016] The utility model is used for dust removal during the discharging process of a blast furnace bunker discharging device. When in use, the negative pressure device of the system is started, and negative pressure is generated in the dust suction pipe 15, the dust suction hood 13, the flexible hose 12, the diversion pipe 11, and the telescopic pipe 7. Suction force is generated near the lower port of the telescopic pipe 7. The discharging trolley 2 slides horizontally along its track. The raw materials in the discharging trolley 2 fall from the two inclined pipes 4 and fall into the bunker silo below through the discharging port 6. At this time, a large amount of dust will be generated and rolled up. These dusts first fly upward through the discharging port 6, and then enter the annular area between the vertical pipe 5 and the telescopic pipe 7 under the action of the suction force. Then, they enter the cavity inside the dust suction hood 13 through the diversion pipe 11 and the flexible hose 12 in sequence, and finally are discharged through the dust suction pipe 13 for unified treatment. During the above working process of the utility model, the dust generated by the falling of the raw materials will enter the cavity inside the dust suction hood 13 through the telescopic pipe 7, the vertical pipe 5, and the flexible hose 12 in sequence. Although there is a certain gap between the dust suction hood 13 and the discharging port 6, the dust is always in a relatively closed pipeline and will not be affected by the wind and cause dispersion. And due to the action of the suction force, it can ensure smooth flow into the dust suction hood 13 even when there is a large amount of dust, solving the problem of dust dispersion during the upward flow process, with relatively thorough dust removal and improved dust removal effect. Secondly, considering that the discharging trolley 2 is often in a moving state during operation, and the main area where dust is generated during the discharging process also moves accordingly. The diversion pipe 11 in the utility model is fixed on the inclined pipe 4 of the discharging trolley 2. When the discharging trolley 2 moves, it drives the diversion pipe 11 and the telescopic pipe 7 to move synchronously, so that the lower end of the telescopic pipe is always located at the most dust-concentrated position, specifically treating the source of dust dispersion, thereby realizing precise dust suction and improving the dust removal efficiency. The extremely small amount of dispersed dust will also enter the cavity inside the dust suction hood 13 after flowing upward through the dust suction through-hole 14, having a good dust removal effect.
[0017] A telescopic rod 16 is concentrically arranged inside the spring 10. During the long-term use of the telescopic pipe 7, problems such as skewing, twisting, and deformation may occur at its lower end. After setting the telescopic rod 16, it has a guiding and fixing effect on the telescopic pipe 7, ensuring that the telescopic pipe 7 extends and contracts in the vertical direction, and at the same time fixing the position of the telescopic pipe 7 to prevent problems such as skewing and twisting.
[0018] On the unloading platform 1 outside the unloading trolley 2, a ring pipe 17 is provided. A number of air jet pipes are evenly arranged in a circle on the ring pipe 17, and the jet direction of the air jet pipes is inclined upward. In the present utility model, most of the dust will be discharged through the telescopic pipe 7, the diversion pipe 11 and the flexible hose 12 in sequence, but there will still be a very small number of dusts discharged from the unloading port 6, resulting in the problem of dust escape. In order to solve this problem, the ring pipe 17 is provided. During operation, pressurized air is introduced into the ring pipe 17, and then the air is ejected from the air jet pipes. The ejection direction is inclined upward and towards the inner side of the dust suction hood 13. In this way, an annular flowing air curtain can be formed outside the unloading trolley 2. When the escaping dust hits the air curtain, it will be driven by the flowing air current, thereby changing the flowing direction of the dust, making the dust accelerate upward flow and quickly enter the dust suction hood 13, thereby preventing the escape of dust.
[0019] An access door 18 is provided on the side of the dust suction hood 13. In the present utility model, most of the dust will enter the dust suction hood 13 through the telescopic pipe 7, the diversion pipe 11 and the flexible hose 12, and a very small part of the dust will enter the dust suction hood 13 through the dust suction through hole 14. Since there is a large amount of dust in the dust, some of the dust will collide with the inside of the cavity of the dust suction hood 13 and then continuously fall into the cavity of the dust suction hood 13. As the dust accumulates more and more, it may cause the problem of blockage, affecting the normal use of the device. In order to solve this problem, the access door 18 is provided, and maintenance personnel and repair personnel can regularly clean the accumulated dust through the access door 18.
[0020] When the unloading trolley 2 moves horizontally, it drives components such as the diversion pipe 11 and the telescopic pipe 1 to move synchronously, while the dust suction hood 13 is in a fixed state. The flexible hose 12 is arranged between the dust suction hood 13 and the diversion pipe 11. One end moves with the diversion pipe 11, and the other end is fixedly connected to the dust suction hood 13. Its own state is constantly changing. As the use time increases, problems such as air leakage and breakage are likely to occur. In order to facilitate the maintenance, disassembly and assembly of the flexible hose 12, the upper end of the flexible hose 12 and the dust suction hood 13, and the lower end of the flexible hose 12 and the upper end of the diversion pipe 11 are both connected by flanges 19.
[0021] A circular curtain 20 is provided on the outside of the lower end of the dust suction hood 13. The curtain 20 includes a number of rubber strips arranged vertically in sequence. The curtain 20 is formed by a number of vertically hanging rubber strips surrounding each other in sequence, and has two functions: one is to block the wind and prevent the problem of dust escape caused by the outside wind blowing the dust; the other is to block the dust and prevent the dust from escaping.
Claims
1. A dust removal device for discharging materials from a blast furnace bunker, comprising a discharging platform (1) and a discharging trolley (2) located above the discharging platform (1), characterized in that : The discharging trolley (2) is in a herringbone structure. The discharging trolley (2) includes a main pipe (3) and two inclined pipes (4) which are connected. The lower end of the inclined pipe (4) is connected with a vertical pipe (5). A discharging port (6) is machined on the discharging platform (1) below each vertical pipe (5). The feeding end of the vertical pipe (5) extends into the discharging port (6). A telescopic pipe (7) is concentrically sleeved on the vertical pipe (5). A sealing gasket (8) is arranged at the lower end of the telescopic pipe (7), and a ring plate (9) is arranged at the upper end. A spring (10) is arranged between the ring plate (9) and the sealing gasket (8). A guiding pipe (11) is concentrically arranged on the ring plate (9). The lower end of the inclined pipe (4) extends into the interior of the guiding pipe (11) and is hermetically and fixedly connected with the guiding pipe (11). The upper end of the guiding pipe (11) is connected with a flexible hose (12). A dust suction hood (13) is arranged above the discharging trolley (2). The dust suction hood (13) is of a hollow structure. The upper end of the flexible hose (12) is communicated with the cavity of the dust suction hood (13). A plurality of dust suction through holes (14) are machined on the lower surface of the dust suction hood (13). The top of the dust suction hood (13) is connected with a dust suction pipe (15).
2. The blast furnace bunker discharging dust removal device according to claim 1, characterized in that : A telescopic rod (16) is concentrically arranged in the spring (10).
3. The blast furnace bunker discharging dust removal device according to claim 1, wherein : A ring pipe (17) is arranged on the discharging platform (1) outside the discharging trolley (2). A plurality of air jet pipes are circumferentially and evenly arranged on the ring pipe (17). The jetting direction of the air jet pipes is inclined upwards.
4. A blast furnace bunker discharging dust removal device according to claim 1, characterized in that : An inspection door (18) is arranged on the side surface of the dust suction hood (13).
5. The blast furnace bunker discharging dust removal device according to claim 1, characterized in that : The upper end of the flexible hose (12) and the dust suction hood (13) as well as the lower end of the flexible hose (12) and the upper end of the guiding pipe (11) are both connected through flanges (19).
6. The blast furnace bunker discharging dust removal device according to claim 1, characterized in that : A circular curtain (20) is arranged on the outer side of the lower end of the dust suction hood (13). The curtain (20) includes a plurality of rubber strips which are arranged vertically in sequence.