Air leakage prevention device of sintering machine

Abstract

The utility model discloses an air leakage prevention device of a sintering machine, which comprises a trolley air bellow, a main exhaust fan and an air path channel arranged between the trolley air bellow and the main exhaust fan, an arc-shaped choke plate is arranged in the air path channel, and an opening of the arc-shaped choke plate is arranged opposite to working air. And a sintered ore particle circulation passage is arranged on the side of the arc-shaped choke plate. According to the air leakage prevention device of the sintering machine, the arc-shaped choke plate is arranged in the air path channel, so that under the condition that the sintering system before iron is sintered can work normally, the air path channel on the rear end side of the arc-shaped choke plate is abraded and leaks air along the path direction of working air, and the air leakage is prevented. After being sucked into the air path channel under the action of negative pressure, the leaked air rotates and turns round under the guide of the arc-shaped choke plate, the sucked leaked air is blocked by the leaked air which rotates and turns round, wind blocking is achieved, the air leakage amount of the sintering machine is reduced, and high-negative-pressure production of the sintering machine is greatly guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of ironmaking sintering equipment in the steel industry, and in particular to a sintering machine anti-leakage device. Background Technology

[0002] In the steel industry, controlling air leakage in the pre-sintering system is a perpetual task. The pre-sintering system, such as... Figure 1 As shown, the sintering machine consists of a sintering machine 101, a trolley air box 102, a main flue 103, an electrostatic precipitator 104, and a main exhaust fan 105. The trolley air box 102 is installed below the sintering machine 101 and above the main flue 103. The trolley air box 102 and the main flue 103 are connected by a vertical straight pipe 106. The main flue 103 is horizontally arranged. The main flue 103, the electrostatic precipitator 104, and the main exhaust fan 105 are connected sequentially by a pipe 107. The working principle of the sintering machine is that the main exhaust fan 105 generates suction, forming a negative pressure. After passing through the electrostatic precipitator 104, the main flue 103, the straight pipe 106, and the trolley air box 102, the pressure is applied to the sintering machine 101, causing the flame of the sintering machine's ignition furnace to sinter (or pre-reduction) from top to bottom from the surface of the raw ore mixed and arranged on the sintering trolley. During the sintering process, a large number of small sinter particles are generated. These small sinter particles flow with the wind direction, wear down the equipment and cause air leakage. The amount of air leakage directly affects the negative pressure, which in turn affects the output and quality of sintering. A good negative pressure for a normal sintering machine is around 16 kPa, and in actual operation, maintaining 13 kPa is ideal.

[0003] The greatest cause of negative pressure loss is air leakage, and the most direct cause of air leakage is wear. In the iron-making sintering system, the air in the bogie wind box 102 enters the main flue 103 through the straight pipe 106. The sintered ore in the air falls from top to bottom into the main flue 103 and accumulates in large quantities there. The main flue 103 is mainly used to collect the sintered ore in the negative pressure air. Therefore, the sintered ore content in the negative pressure air is relatively high at the front end of the main flue 103, and relatively low at the rear end. In other words, along the air path from bogie wind box 102 to straight pipe 106 to main flue 103 to electrostatic precipitator 104 to main exhaust fan 105, the location with the largest amount of sintered ore particles carried by the air, except for bogie wind box 102, is straight pipe 106, and it is also the straight pipe 106 that suffers the most severe wear.

[0004] During the sintering process, it is inevitable that small particles of sintered ore will wear down the metal with the wind. Therefore, the long-term solution for air leakage in sintering machines is to repair and seal the worn and leaking parts by welding. This requires a lot of manpower, which is labor-intensive, time-consuming and laborious. If the leaks are not repaired and sealed in time, it will affect the sintering quality and cannot fundamentally prevent the air leakage problem. Utility Model Content

[0005] The purpose of this utility model is to provide a sintering machine air leakage prevention device, which reduces air leakage by setting an arc-shaped air baffle in the air passage and ensures high negative pressure production of the sintering machine.

[0006] The technical solution to achieve the purpose of this utility model is: a sintering machine air leakage prevention device, including a trolley air box, a main exhaust fan, and an air passage between the trolley air box and the main exhaust fan. An arc-shaped wind baffle is installed in the air passage, and the opening of the arc-shaped wind baffle is arranged away from the working air. A sintered ore particle flow passage is provided in the air passage and on the side of the arc-shaped wind baffle.

[0007] Furthermore, the arc-shaped wind baffle has a sintered ore particle flow channel on at least one side. The arc-shaped wind baffle has a gap on at least one side to form the sintered ore particle flow channel.

[0008] Furthermore, the arc-shaped wind baffle is horizontally installed within the air passage. The arc-shaped wind baffle can be installed horizontally or at an angle. When the arc-shaped wind baffle is installed at an angle to block air leakage, the resulting leakage path is inclined, and the angled airflow has a relatively weaker blocking effect. However, when the arc-shaped wind baffle is installed horizontally to block air leakage, the resulting leakage path is reversed, directly blocking the leakage, resulting in a better blocking effect.

[0009] Furthermore, both ends of the arc-shaped wind baffle are fixedly installed on the inner wall of the air duct. The arc-shaped wind baffle can be installed on a bracket inside the air duct, or it can be directly installed on the inner wall of the air duct. Compared to the former, the installation structure is simpler when directly installed on the inner wall of the air duct.

[0010] Furthermore, an outer lining is provided on the back of the arc-shaped wind baffle. The outer lining enhances the strength of the arc-shaped wind baffle, making the back of the arc-shaped wind baffle less susceptible to wear and cracking due to impact and friction from sintered ore particles.

[0011] Furthermore, the outer lining is a ceramic lining. Ceramic linings not only have high strength but also high surface smoothness and a low coefficient of friction, resulting in less frictional force exerted on them by the sintered ore. This makes them more wear-resistant and provides better anti-wear performance.

[0012] Furthermore, the number of arc-shaped windbreaks is several, and these arc-shaped windbreaks are arranged at intervals. The larger coverage area of ​​these arc-shaped windbreaks results in better blocking of air leakage.

[0013] Furthermore, several of the aforementioned arc-shaped windbreaks are arranged in several rows along the airflow path of the airflow channel, with the rows of arc-shaped windbreaks being staggered. While ensuring that large particles of sintered ore in the air can pass through the spaces between the arc-shaped windbreaks, the staggered arrangement allows for a larger coverage area for blocking air leakage, resulting in a better blocking effect.

[0014] Furthermore, the number of the arc-shaped windbreaks is three.

[0015] Furthermore, the airflow channel includes a large flue and a straight pipe. The large flue is located below the trolley air box, and the large flue is connected to the trolley air box via the straight pipe. The large flue is also connected to the main exhaust fan, and the arc-shaped wind baffle is located inside the straight pipe. The trolley air box, the main exhaust fan, the large flue, and the straight pipe constitute the iron-preheating sintering system. This iron-preheating sintering system, consisting of the trolley air box, the main exhaust fan, the large flue, and the straight pipe, is an existing structure, and will not be elaborated further in this invention. In the iron-preheating sintering system, the large flue and the straight pipe participate in forming the airflow channel, serving as sections of the airflow channel. In the iron-preheating sintering system, the large flue is mainly used to collect sintered ore from the negative pressure air. Therefore, the front end of the large flue has a relatively high sintered ore content in the negative pressure air, while the rear end of the large flue has a relatively low sintered ore content in the negative pressure air. The straight pipe is located at the front end of the main flue, serving as the conduit between the main flue and the trolley air box. The negative pressure air passing through the straight pipe contains a high content of sintered ore, resulting in the most severe wear and making it most prone to air leakage. The arc-shaped windbreak can be installed in any section of the airflow path. Compared to placing arc-shaped windbreaks in other sections, this invention achieves the most effective air leakage prevention by placing the arc-shaped windbreak within the straight pipe, which is most susceptible to leakage.

[0016] Furthermore, the inner wall of the air duct is lined. In addition to the arc-shaped windbreak plate, the lining can also be laid on the inner wall of the air duct to enhance the strength of the inner wall of the air duct, making the inner wall of the air duct less prone to wear and cracking.

[0017] Furthermore, the inner lining is a ceramic lining. Ceramic linings not only have high strength but also high surface smoothness and a low coefficient of friction. The frictional force exerted on them by sintered ore is also smaller, making them more wear-resistant and providing better wear protection.

[0018] This utility model relates to a sintering machine anti-leakage device, in which an arc-shaped air baffle is installed in the air passage. The arc-shaped air baffle has an opening facing away from the working air and is left with gaps to form a passage for sintered ore particles. The presence of the passage for sintered ore particles ensures that the arc-shaped air baffle does not block the flow of working air in the air passage. The opening facing away from the working air allows sintered ore particles carried by the working air to slide off the arc-shaped air baffle when they are blown onto it, rather than accumulating on it. In other words, the arc-shaped air baffle does not hinder the normal flow of working air and the sintered ore particles carried by the working air in the air passage, thus ensuring the normal operation of the ironmaking sintering system. Under the premise of ensuring the normal operation of the iron-forward sintering system, if the air passage on the rear side of the arc-shaped wind baffle is worn or leaks along the path of the working air, the leaked air will be sucked into the air passage due to the negative pressure. Under the guidance of the arc-shaped wind baffle, the leaked air will turn around and block the sucked-in air, thus achieving "wind blocking" and reducing the amount of air leakage in the sintering machine, which greatly ensures the high negative pressure production of the sintering machine.

[0019] This utility model relates to a sintering machine anti-leakage device. The "wind-blocking" function of the arc-shaped wind baffle is not limited to a single point; it can block any air leakage at the rear end of the arc-shaped wind baffle. With this "wind-blocking" structure, firstly, it is not necessary to install it at every leakage point on the rear end of the arc-shaped wind baffle; installing it at one point is sufficient to block leakage at any location on the rear end of the arc-shaped wind baffle, making it simple to install and inexpensive. Secondly, because the arc-shaped wind baffle does not target a single leakage point, it does not need to be installed based on the leakage location. In other words, the installation of the arc-shaped wind baffle does not require knowledge of the leakage location. This not only facilitates installation but, more importantly, allows for pre-emptive installation to prevent leakage, greatly improving the timeliness of "wind blocking" and reducing leakage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the iron pre-sintering system;

[0021] Figure 2 This is a schematic diagram of the air leakage prevention device for the sintering machine of this utility model; the hollow arrow in the figure indicates the direction of the working air flow;

[0022] Figure 3 for Figure 2 A partially enlarged structural diagram; hollow arrows in the diagram indicate the direction of working airflow, and solid arrows indicate the direction of leaking airflow;

[0023] Figure 4 for Figure 3 Cross-sectional view along line AA. Detailed Implementation

[0024] The preferred embodiment of the sintering machine anti-leakage device of this utility model is described in detail below with reference to the accompanying drawings.

[0025] like Figures 2 to 4 As shown, a sintering machine anti-leakage device includes a trolley air box 10, a main exhaust fan 20, and an air passage 100 between the trolley air box 10 and the main exhaust fan 20. An arc-shaped wind baffle 1 is installed in the air passage 100, and the opening of the arc-shaped wind baffle 1 is arranged away from the working air. A sintered ore particle flow passage 2 is provided in the air passage 100 and on the side of the arc-shaped wind baffle 1.

[0026] This utility model relates to a sintering machine anti-leakage device. The trolley air box 10 and the main exhaust fan 20 form a pre-iron sintering system. During operation, the main exhaust fan 20 draws air along the air passage 100, creating a negative pressure inside the trolley air box 10. This draws the flame from the ignition furnace of the sintering machine downwards, sintering the raw ore material mixed and arranged on the sintering trolley from top to bottom. During the sintering process, after the main exhaust fan 20 starts, the generated working air will carry away some sintered particles into the air passage 100, causing wear on the air passage 100. Over time, this will lead to damage and air leakage in the air passage 100. The trolley air box 10, the main exhaust fan 20, and the pre-iron sintering system and its operating process are all existing technologies, and this utility model will not elaborate further on them.

[0027] This utility model relates to a sintering machine anti-leakage device. The arc-shaped baffle plate 1, with its opening facing away from the working airflow within the air passage 100, has a gap on its side, forming a sintered ore particle flow passage 2. With the sintered ore particle flow passage 2 in place, the arc-shaped baffle plate 1 will not block the flow of working air, nor will it obstruct the passage of sintered particles, thus ensuring the normal operation of the sintering process. While ensuring the normal flow of working air during sintering, the arc-shaped baffle plate 1 within the air passage 100 also guides leaked air that enters the air passage 100 due to damage, causing the leaked air to circulate. Specifically, when the air passage 100 is damaged and leaks air, the leaked air will be drawn into the air passage 100 due to the negative pressure. When the leaked air drawn into the air passage 100 encounters the arc-shaped wind baffle 1, it will turn around under the guidance of the arc-shaped wind baffle 1. The turning leaked air will block the drawn-in leaked air, forming resistance and suppressing the large amount of leaked air entering, thus achieving the function of wind baffle.

[0028] This utility model relates to a sintering machine anti-leakage device. An arc-shaped air baffle 1 is installed within the air passage 100. The arc-shaped air baffle 1 has its opening facing away from the working air and is spaced to form a sintered ore particle flow channel 2. The presence of the sintered ore particle flow channel 2 within the air passage 100 ensures that the arc-shaped air baffle 1 does not obstruct the flow of working air within the air passage 100. The opening facing away from the working air allows sintered ore particles carried by the working air to slide off the arc-shaped air baffle 1 when they are blown onto it, preventing them from accumulating on the arc-shaped air baffle 1. In other words, the arc-shaped air baffle 1 does not hinder the normal flow of working air and the sintered ore particles carried by the working air within the air passage 100, thus ensuring the normal operation of the ironmaking sintering system. Under the premise of ensuring the normal operation of the iron-forward sintering system, if the air passage 100 on the rear side of the arc-shaped wind baffle 1 is worn or leaks air along the path of the working air, the leaked air will be sucked into the air passage 100 due to the negative pressure. Then, under the guidance of the arc-shaped wind baffle 1, it will turn around and block the sucked-in air, thus achieving "wind blocking" and reducing the air leakage of the sintering machine, which greatly ensures the high negative pressure production of the sintering machine.

[0029] This utility model relates to a sintering machine anti-leakage device. The "wind-blocking" function of the arc-shaped wind baffle 1 is not limited to a single point; it can block any air leakage at the rear end of the arc-shaped wind baffle 1. With this "wind-blocking" structure, firstly, it is not necessary to install it at every leakage point on the rear end of the arc-shaped wind baffle 1. Installing it at one point is sufficient to block any leakage at any location on the rear end of the arc-shaped wind baffle 1, making it simple to install and inexpensive. Secondly, because the arc-shaped wind baffle 1 does not target a single leakage point, it does not need to be installed based on the leakage location. In other words, the installation of the arc-shaped wind baffle 1 does not require knowledge of the leakage location. This not only facilitates installation but, more importantly, allows for pre-emptive installation to prevent leakage. This preventative installation greatly improves the timeliness of "wind blocking" and reduces leakage.

[0030] In this utility model, the air leakage prevention device for a sintering machine preferably has a sintered ore particle flow passage 2 on at least one side of the arc-shaped air baffle 1.

[0031] In this invention, the air leakage prevention device for a sintering machine preferably has the arc-shaped air baffle 1 horizontally positioned within the air passage 100. The arc-shaped air baffle 1 can be horizontally positioned or inclined. When the inclined arc-shaped air baffle 1 blocks air leakage, the resulting air leakage path is inclined, and the inclined airflow has a relatively weaker blocking effect. Conversely, when the horizontally positioned arc-shaped air baffle 1 blocks air leakage, the resulting air leakage path is reversed, directly blocking the leakage, resulting in a better blocking effect.

[0032] In this invention, the air leakage prevention device for a sintering machine preferably has both ends of the arc-shaped air baffle 1 fixedly installed on the inner wall of the air passage 100. The arc-shaped air baffle 1 can be installed on a bracket inside the air passage 100, or it can be directly installed on the inner wall of the air passage 100. Compared to the former, the installation structure is simpler when directly installed on the inner wall of the air passage 100.

[0033] In this utility model of an air-leakage prevention device for a sintering machine, preferably, an outer lining 11 is laid on the back of the arc-shaped air baffle plate 1. The outer lining 11 can enhance the strength of the arc-shaped air baffle plate 1, making the back of the arc-shaped air baffle plate 1 less prone to wear and cracking due to impact and friction from sintered ore particles.

[0034] In this utility model of an air-leakage prevention device for a sintering machine, preferably, the outer lining 11 is a ceramic lining. Ceramic linings not only have high strength but also high surface smoothness and a low coefficient of friction, resulting in less frictional force exerted on them by the sintered ore, making them more wear-resistant and providing better wear-proof performance.

[0035] In this invention, the air leakage prevention device for a sintering machine preferably comprises several arc-shaped air baffles 1 arranged at intervals. The larger coverage area of ​​the multiple arc-shaped air baffles 1 results in better air leakage prevention.

[0036] In this invention, the air leakage prevention device for a sintering machine preferably comprises several rows of arc-shaped air baffles 1 arranged along the air path of the air passage 100, with the rows of arc-shaped air baffles 1 staggered. While ensuring that large particles of sintered ore in the air can pass through the spaces between the arc-shaped air baffles 1, the staggered arrangement allows for a larger coverage area for preventing air leakage, resulting in a better air leakage prevention effect.

[0037] In this utility model, the number of the air-leakage prevention device for the sintering machine is preferably three.

[0038] The present invention relates to a sintering machine anti-leakage device, preferably comprising an air passage 100 including a large flue 30 and a straight pipe 40. The large flue 30 is located below the trolley air box 10, and the large flue 30 is connected to the trolley air box 10 via the straight pipe 40. The large flue 30 is also connected to the main exhaust fan 20, and the arc-shaped baffle plate 1 is located within the straight pipe 40. The trolley air box 10, the main exhaust fan 20, the large flue 30, and the straight pipe 40 constitute a pre-sintering sintering system. This pre-sintering sintering system, consisting of the trolley air box 10, the main exhaust fan 20, the large flue 30, and the straight pipe 40, is an existing structure and will not be elaborated upon further in this invention. In the pre-sintering sintering system, the large flue 30 and the straight pipe 40 participate in forming the air passage 100, serving as partial sections of the air passage 100. In the iron-making sintering system, the main flue 30 is primarily used to collect sintered ore from the negative pressure air. Therefore, the front end of the main flue 30 has a relatively high sintered ore content in the negative pressure air, while the rear end has a relatively low sintered ore content. The straight pipe 40 is located at the front end of the main flue 30, serving as the conduit between the main flue 30 and the trolley air box 10. The negative pressure air passing through the straight pipe 40 has a high sintered ore content, resulting in the most severe wear and making it most prone to air leakage. The arc-shaped wind baffle 1 can be installed in any section of the air passage 100. Compared to placing the arc-shaped wind baffle 1 in other sections, this invention achieves the most effective air leakage prevention by placing the arc-shaped wind baffle 1 within the most leak-prone straight pipe 40.

[0039] In this utility model of an air leakage prevention device for a sintering machine, preferably, an inner lining 3 is laid on the inner wall of the air passage 100. In addition to the arc-shaped air baffle 1, the inner lining 3 can also be laid on the inner wall of the air passage 100. The inner lining 3 enhances the strength of the inner wall of the air passage 100, making the inner wall of the air passage 100 less prone to wear and cracking.

[0040] In this utility model of an air-leakage prevention device for a sintering machine, preferably, the inner lining 3 is a ceramic lining. Ceramic linings not only have high strength but also high surface smoothness and a low coefficient of friction, resulting in less frictional force exerted on them by the sintered ore, making them more wear-resistant and providing better wear-proof performance.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent process transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sintering machine air leakage prevention device, comprising a pallet air box, a main air extractor, and an air path channel arranged between the pallet air box and the main air extractor, characterized in that: The wind path channel is provided with an arc-shaped wind baffle, and an opening of the arc-shaped wind baffle faces away from the working wind; a sinter particle flow passage is arranged on a side of the arc-shaped wind baffle in the wind path channel.

2. The sintering machine air leakage prevention device according to claim 1, characterized in that: The arc-shaped wind baffle is provided with a sinter particle flow passage on at least one side.

3. The sintering machine air leakage prevention device according to claim 1, characterized in that: The arc-shaped wind baffle is horizontally arranged in the wind path channel.

4. The sinter machine air leakage prevention apparatus according to claim 1, characterized by: Two ends of the arc-shaped wind baffle are fixedly arranged on inner walls of the wind path channel.

5. The sintering machine air leakage prevention device according to claim 1, characterized in that: An outer lining is arranged on a back surface of the arc-shaped wind baffle; the outer lining is a ceramic lining.

6. The sinter machine air leakage prevention apparatus as claimed in claim 1 wherein: A plurality of arc-shaped wind baffles are arranged in a plurality of rows along a wind path of the wind path channel.

7. The sintering machine air leakage prevention device according to claim 6, characterized in that: The plurality of arc-shaped wind baffles are arranged in a staggered manner.

8. The sintering machine air leakage prevention device according to claim 1, characterized in that: The number of the arc-shaped wind baffles is three.

9. The sintering machine air leakage prevention apparatus according to claim 1, characterized by: The wind path channel comprises a large flue and a straight pipeline; the large flue is located below the trolley air box; the large flue and the trolley air box are communicated through the straight pipeline; the large flue is communicated with the main air extractor; and the arc-shaped wind baffle is arranged in the straight pipeline.

10. The sintering machine air leakage prevention apparatus according to claim 1, characterized in that: An inner lining is arranged on an inner wall of the wind path channel; the inner lining is a ceramic lining.

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