Low-negative-pressure ignition and air regulation device

Abstract

The utility model discloses a low negative pressure ignition air regulation device, which belongs to the technical field of steel production and comprises a main exhaust fan, a smoke guide main pipe is arranged on the main exhaust fan, a third air bellow communicated with the smoke guide main pipe through a first air guide pipe is arranged on the smoke guide main pipe, and the third air bellow is communicated with a first air bellow and a second air bellow through pipelines. One side of the upper portion of the smoke guiding main pipe communicates with a fourth air bellow and a fifth air bellow through a second air guiding pipe and a third air guiding pipe correspondingly, a first protection assembly is arranged between the third air bellow and the fourth air bellow, a second protection assembly is arranged between the fourth air bellow and the fifth air bellow, and collecting assemblies are arranged below the first air bellow and the second air bellow correspondingly. The phenomenon that the whole pipeline system loses the negative pressure adjusting capacity due to the fact that bulk materials wash an electric control valve in a pipeline at a high speed after too many loose fine particle materials are stacked at the front end in the sintering process and are sucked into the pipeline under the action of high negative pressure can be avoided, and the situation that the ignition effect and the sintering production efficiency are affected is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of iron and steel production, and specifically relates to a low negative pressure ignition air regulating device. Background Technique

[0002] In the sintering process of iron and steel production, the solid fuel in the mixed material needs to be ignited to start the sintering process. The main purpose is to provide sufficient heat source to the materials on the sintering machine, ignite the solid fuel on the surface layer of the mixed material, and under the action of air extraction, make the sintering process proceed from bottom to top. To achieve this, an appropriate negative pressure must be generated in the sintering ignition section. The role of negative pressure is to control the airflow through the sintered material layer, so as to ensure the full combustion of fuel and the effective transfer of heat. If the negative pressure is too low, insufficient air flow will lead to incomplete ignition and affect the sintering quality; if the negative pressure is too high, too much cold air will be sucked in, thus taking away part of the heat, and may cause part of the gas to be sucked away before it is fully burned, ultimately affecting the ignition efficiency.

[0003] However, the current negative pressure ignition process also faces some problems. Especially at the front end of the pipeline during the air guiding and blowing process of the air box in the sintering process, the air flow velocity is high and the pressure difference is large, which will enhance the attraction to the loose particulate materials. Under the action of high negative pressure, the loose particulate materials are more likely to be sucked into the pipeline interior, resulting in the high-speed scouring of the electric control valve inside the pipeline by the scattered materials. This scouring effect will quickly wear the valve core, making the entire pipeline system lose the ability to adjust the negative pressure, thus affecting the ignition effect, further increasing the gas consumption and reducing the production efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a low negative pressure ignition air regulating device to solve at least one aspect of the problems and defects mentioned in the above background technique.

[0005] Provide a low negative pressure ignition air regulating device, including a main induced draft fan. A main smoke guiding pipe is arranged on the main induced draft fan. A third air box is connected to the main smoke guiding pipe through a first air pipe. The third air box is connected to a first air box and a second air box through pipelines. One side of the upper part of the main smoke guiding pipe is connected to a fourth air box and a fifth air box through a second air pipe and a third air pipe respectively. A first protection component is arranged between the third air box and the fourth air box. A second protection component is arranged between the fourth air box and the fifth air box. Collection components are arranged below both the first air box and the second air box.

[0006] As a further embodiment of the present utility model: The first protection component includes a mounting plate body, in which a first wind deflector is slidably connected. Above the first wind deflector, there is a wind deflector platform. The first wind deflector can move on the mounting plate body to adjust the height of the wind deflector from the upper end surface of the mounting plate body, blocking the airflow of the fourth air box from flowing into the third air box, preventing the fourth air box and the third air box from interfering with each other. The wind deflector platform is located above the wind deflector, covering the entire surface of the wind deflector, providing additional protection for the wind deflector, reducing the direct impact on the wind deflector finally, and extending the service life of the wind deflector.

[0007] As a further embodiment of the present utility model: The mounting plate body is provided with positioning holes, and the wind deflector is provided with a plurality of limit holes. A fastening bolt for passing through the positioning holes and the limit holes is arranged in the positioning holes. When the first wind deflector slides to a suitable height on the mounting plate body, the position of the wind deflector is locked by the fastening bolt passing through the positioning holes and the limit holes.

[0008] As a further embodiment of the present utility model: The second protection component includes a mounting flat plate, and a plurality of second wind deflectors are arranged on the plurality of mounting flat plates. The main function of the second wind deflectors is to block and control the airflow from the fifth air box, preventing it from directly affecting the airflow state inside the fourth air box. Since the lengths and sizes of the second wind deflectors are different, they can provide different degrees of blocking according to the actual change of the airflow, thereby optimizing the airflow distribution and ensuring the airflow stability inside the fourth air box.

[0009] As a further embodiment of the present utility model: The collection component includes a dust discharge valve, which is arranged below the first air box and the second air box. A collection bin is connected to the lower part of the dust discharge valve through a pipeline. The dust discharge valve can discharge the bulk material from the first air box and the second air box, avoiding the accumulation of the bulk material inside the first air box and the second air box, thereby ensuring the normal operation of the first air box and the second air box. By timely cleaning the bulk material, the dust discharge valve can effectively prevent the bottom of the air box from being blocked, ensure the smooth flow of the airflow, maintain the negative pressure condition inside the first air box and the second air box, and meet the sintering ignition requirement.

[0010] As a further embodiment of the present utility model: The collection bin is detachably connected to the lower part of the dust discharge valve.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The first bellows, the second bellows and the third bellows jointly obtain negative pressure through the first air duct, reducing the negative pressure inside the first bellows and the second bellows, while ensuring that the requirements of the low-negative-pressure ignition process are met, and avoiding the problem of excessive negative pressure caused by directly connecting the first bellows and the second bellows to the main smoke duct. The first protection component is used to reduce the negative pressure interference of the fourth bellows and the fifth bellows on the third bellows, ensuring the stability of the negative pressure inside the third bellows. The second protection component is used to reduce the negative pressure interference of the fifth bellows on the fourth bellows, maintaining the independence and stability of each bellows, further optimizing the negative pressure distribution of the entire system, ensuring the stability and independence of each bellows. The collection component ensures that the scattered materials are cleaned in time, reducing the erosion of the main smoke duct and the bellows, and can avoid the phenomenon that too much loose fine-grained materials at the front end during the sintering process are sucked into the pipeline under the action of high negative pressure, resulting in the scattered materials scouring the electric control valve inside the pipeline at high speed, causing the entire pipeline system to lose the ability to adjust negative pressure, and avoiding its impact on the ignition effect and affecting the sintering production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present drawings or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present drawings. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of a low-negative-pressure ignition air-adjusting device;

[0015] Figure 2 It is a schematic diagram of the structure of the first protection component provided by the present utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the second protection component provided by the present utility model.

[0017] In the figure: 1, main exhaust fan; 2, main smoke duct; 3, first air duct; 4, third bellows; 5, first bellows; 6, second bellows; 7, second air duct; 8, third air duct; 9, fourth bellows; 10, fifth bellows; 11, first protection component; 111, mounting plate body; 1111, positioning hole; 112, first wind baffle; 1121, limiting hole; 113, wind baffle platform; 12, second protection component; 121, mounting flat plate; 122, second wind baffle; 13, collection component; 131, ash discharge valve; 132, collection bin; 14, fastening bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without creative efforts fall within the scope of protection of the present application.

[0019] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, the present application can also be applied to other similar scenarios based on these drawings without creative efforts. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood that the content disclosed in the present application is insufficient.

[0020] However, there will be cases where unnecessary details are omitted. For example, there are cases where the detailed description of well-known matters is omitted and the repeated description of actually identical structures is omitted. This is to avoid the following description becoming unnecessarily lengthy and to facilitate the understanding of those skilled in the art. In addition, the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present application and are not intended to limit the subject matter recited in the claims.

[0021] Please refer to Figures 1-3As shown in the figure, in the embodiment of the present utility model, a low negative pressure ignition air regulating device includes a main exhaust fan 1. A main smoke guide pipe 2 is arranged on the main exhaust fan 1, and the main smoke guide pipe 2 is used for transmitting flue gas. A third air box 4 is connected to the main smoke guide pipe 2 through a first air duct 3. The third air box 4 is connected to a first air box 5 and a second air box 6 through pipelines. At this time, the first air box 5, the second air box 6 and the third air box 4 jointly obtain negative pressure through the first air duct 3. The first air box 5 and the second air box 6 are not directly connected to the main smoke guide pipe 2, so the negative pressure on the first air box 5 and the second air box 6 is reduced, but still can meet the requirements of the low negative pressure ignition process. The first air box 5 and the second air box 6 are located in the ignition section of the sintering machine trolley, while most of the other air boxes are concentratedly installed in the heat preservation section of the sintering machine trolley. One side of the upper part of the main smoke guide pipe 2 is respectively connected to a fourth air box 9 and a fifth air box 10 through a second air duct 7 and a third air duct 8. A first protection component 11 is arranged between the third air box 4 and the fourth air box 9, and the first protection component 11 is used to reduce the interference of the fourth air box 9 and the fifth air box 10 on the third air box 4. A second protection component 12 is arranged between the fourth air box 9 and the fifth air box 10, which is used to reduce the interference of the fifth air box 10 on the fourth air box 9. Collection components 13 are arranged below both the first air box 5 and the second air box 6. Since the negative pressure inside the first air box 5 and the second air box 6 is relatively low, scattered materials are likely to fall into and block the first air box 5 and the second air box 6. While meeting the low negative pressure requirement, these scattered materials falling into the air boxes can be discharged into the collection components 13 below, solving the problem of the flue gas main pipe being washed by the scattered materials, ensuring the smooth flow of the air flow in the air boxes, and reducing the harm and frequency of system maintenance;

[0022] The first bellows 5, the second bellows 6 and the third bellows 4 jointly obtain negative pressure through the first air duct 3, reducing the negative pressure inside the first bellows 5 and the second bellows 6, while ensuring the requirements of the low negative pressure ignition process. The main flue pipe 2 is used to transfer flue gas, and transfers the negative pressure to the third bellows 4 through the first air duct 3, and then affects the negative pressure of the first bellows 5 and the second bellows 6 through the connected pipes. The main flue pipe 2 is used to transfer flue gas, and transfers the negative pressure to the third bellows 4 through the first air duct 3, and then affects the negative pressure of the first bellows 5 and the second bellows 6 through the connected pipes, avoiding the problem of excessive negative pressure caused by directly connecting the first bellows 5 and the second bellows 6 to the main flue pipe 2. The first protection component 11 is used to reduce the negative pressure interference of the fourth bellows 9 and the fifth bellows 10 on the third bellows 4, ensuring the stability of the negative pressure inside the third bellows 4. The second protection component 12 is used to reduce the negative pressure interference of the fifth bellows 10 on the fourth bellows 9, maintaining the independence and stability of each bellows, further optimizing the negative pressure distribution of the entire system, ensuring the stability and independence of each bellows. The design of the collection component 13 ensures that the bulk materials are cleaned in time, reducing the erosion of the main flue pipe 2 and the bellows, and can avoid the phenomenon that too much loose fine particle materials at the front end during the sintering process are sucked into the pipeline under the action of high negative pressure, resulting in the bulk materials scouring the electric control valve inside the pipeline at high speed, causing the entire pipeline system to lose the ability to adjust negative pressure, affecting the ignition effect and sintering production efficiency.

[0023] In a further embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, the first protection component 11 includes a mounting plate body 111. The mounting plate body 111 is arranged between the third bellows 4 and the fourth bellows 9. A first wind baffle 112 is slidably connected inside the mounting plate body 111. A wind blocking platform 113 is arranged above the first wind baffle 112. The first wind baffle 112 can move on the mounting plate body 111 to adjust the height of the first wind baffle 112 from the upper end surface of the mounting plate body 111, blocking the airflow of the fourth bellows 9 from flowing into the third bellows 4, preventing the fourth bellows 9 and the third bellows 4 from interfering with each other. The wind blocking platform 113 is located above the first wind baffle 112, covering the entire surface of the first wind baffle 112, providing additional protection for the first wind baffle 112, reducing the direct impact on the first wind baffle 112, and extending the service life of the first wind baffle 112.

[0024] In a further embodiment, please refer to Figure 1 and Figure 2As shown, positioning holes 1111 are provided on the mounting plate body 111, and a number of limiting holes 1121 are provided on the first wind baffle 112. A fastening bolt 14 for passing through the positioning hole 1111 and the limiting hole 1121 is provided in the positioning hole 1111. When the first wind baffle 112 slides to a suitable height on the mounting plate body 111, the position of the first wind baffle 112 is locked by passing the fastening bolt 14 through the positioning hole 1111 and the limiting hole 1121.

[0025] Furthermore, in one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 As shown, the second protection component 12 includes a mounting flat plate 121, and a number of second wind baffles 122 are provided on the number of mounting flat plates 121. The lengths of the number of second wind baffles 122 are different, and are used to block the influence of the air flow of the fifth air box 10 on the air flow of the fourth air box 9. The main function of the second wind baffle 122 is to block and control the air flow from the fifth air box 10, preventing it from directly affecting the air flow state inside the fourth air box 9. Since the lengths and sizes of the second wind baffles 122 are different, they can provide different degrees of blockage according to the actual change of the air flow, so as to optimize the air flow distribution and ensure the air flow stability inside the fourth air box 9.

[0026] In one embodiment, please refer to Figure 1 and Figure 2 As shown, the collection component 13 includes a dust discharge valve 131. The dust discharge valve 131 is arranged below the first air box 5 and the second air box 6. A collection bin 132 is connected below the dust discharge valve 131 through a pipeline. The dust discharge valve 131 is installed below the first air box 5 and the second air box 6. The dust discharge valve 131 can discharge the bulk material from the first air box 5 and the second air box 6, avoiding the internal accumulation of the bulk material in the first air box 5 and the second air box 6, so as to ensure the normal operation in the first air box 5 and the second air box 6. By timely cleaning the bulk material, the dust discharge valve 131 can effectively prevent the bottom of the air box from being blocked, ensure the smooth flow of the air flow, maintain the negative pressure condition in the first air box 5 and the second air box 6, and meet the sintering ignition requirements.

[0027] In one embodiment, please refer to Figure 1 and Figure 2 As shown, the collection bin 132 is detachably connected below the dust discharge valve 131. The dust discharge valve 131 can accurately control the discharge speed and quantity of the bulk material, avoiding the blockage or difficult handling caused by the one-time discharge of too much bulk material. With the detachable collection bin 132, the whole system is more efficient and reliable in handling the bulk material. After the collection bin 132 is full, a new collection bin 132 is quickly replaced to ensure the continuous operation of the system.

[0028] It should be noted that this application is not limited to the above embodiments. The above embodiments are only examples, and embodiments with the same composition and the same function and effect as the technical idea within the scope of the technical solution of this application are all included in the technical scope of this application. In addition, within the scope of not departing from the gist of this application, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways constructed by combining some constituent elements in the embodiments are also included in the scope of this application.

Claims

1. A low negative pressure ignition and air regulating device, comprising a main exhaust fan (1), characterized in that, A main exhaust fan (1) is provided with a main smoke guide pipe (2). The main smoke guide pipe (2) is provided with a third air box (4) connected through a first air duct (3). The third air box (4) is connected to a first air box (5) and a second air box (6) through pipes. One side of the upper part of the main smoke guide pipe (2) is connected to a fourth air box (9) and a fifth air box (10) through a second air duct (7) and a third air duct (8) respectively. A first protection component (11) is arranged between the third air box (4) and the fourth air box (9), and a second protection component (12) is arranged between the fourth air box (9) and the fifth air box (10). Collection components (13) are arranged below both the first air box (5) and the second air box (6).

2. The low negative pressure ignition air regulating device according to claim 1, characterized in that The first protection component (11) includes a mounting plate body (111). A first wind baffle (112) is slidably connected inside the mounting plate body (111). A wind protection platform (113) is arranged above the first wind baffle (112).

3. A low negative pressure ignition and air regulation device according to claim 2, characterized in that, The mounting plate body (111) is provided with positioning holes (1111). The first wind baffle (112) is provided with a plurality of limiting holes (1121). A fastening bolt (14) for passing through the positioning holes (1111) and the limiting holes (1121) is arranged in the positioning holes (1111).

4. A low negative pressure ignition and air adjustment device according to claim 1, characterized in that, The second protection component (12) includes a mounting flat plate (121). A plurality of second wind baffles (122) are arranged on the plurality of mounting flat plates (121).

5. The low negative pressure ignition and air regulation device according to claim 1, characterized in that, The collection component (13) includes an ash discharge valve (131). The ash discharge valve (131) is arranged below the first air box (5) and the second air box (6). The ash discharge valve (131) is connected to a collection bin (132) through a pipe below it.

6. The low negative pressure ignition air regulating device according to claim 5, characterized in that, The collection bin (132) is detachably connected below the ash discharge valve (131).

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