A dry fog dust suppression system for steelmaking slag pits

Abstract

This utility model relates to the field of steel slag dust control technology, specifically to a dry fog dust suppression system for steelmaking slag pits. The system includes a water system and an air system. By adding an air system to the existing water system for dry fog dust suppression in the steelmaking slag pit, the air system delivers high-speed airflow to the atomizing nozzles, resulting in more thorough atomization of the water flow and a wider spray range, thus improving the dust suppression effect on the slag pit. A branch air path in the air system connects to the water system and is connected to the outlet of the water solenoid valve. After the dry fog dust suppression operation is completed and the water solenoid valve is closed, the branch air path delivers high-speed airflow to the water system downstream of the solenoid valve, blowing away any remaining water and preventing it from flowing into the steelmaking slag pit and causing an explosion.

Description

Technical Field

[0001] This utility model relates to the field of steel slag dust control technology, and in particular to a dry fog dust suppression system for steelmaking slag pools. Background Technology

[0002] In the steelmaking process, steel slag is typically transferred from the steelmaking workshop to the slag treatment workshop, where it is dumped into a slag-filling pit using overhead cranes or other slag-pouring equipment. During this process, harmful substances such as heavy metals and organic matter are generated as dust, which can be released into the external environment, causing pollution. It can also pose occupational hazards to workers, making dust suppression treatment of the slag-filling pit crucial.

[0003] Currently, a commonly used and mature dust suppression method is to use atomizing nozzles, which suppress dust by spraying water mist. These nozzles employ ultrasonic or pressure atomization to atomize liquid water into ultrafine water mist particles. These micron-sized water mist particles are similar in size to dust particles, and the two collide frequently due to Brownian motion. The surface tension of the water mist causes the dust particles to be adsorbed and encapsulated, forming larger agglomerates. These agglomerated particles settle due to their increased mass, with typical settling rates reaching 3-5 times that of untreated dust. Furthermore, the evaporation of the water mist increases air humidity, causing the dust to absorb moisture and increase in weight, while simultaneously suppressing secondary dust re-entrainment.

[0004] However, the situation after steel slag is poured into the steelmaking slag pit is different from that of ordinary dust environments. If water flows directly into the steelmaking slag pit, there is a possibility of a blowout explosion, which could bring greater safety hazards.

[0005] The problem is that water can easily accumulate in the pipes supplying the atomizing nozzles, especially after valves and other components on the pipes are closed. The loss of water pressure at the source causes some water to remain in the pipes. This accumulated water can easily flow into the steelmaking slag pool, potentially triggering a blowout. Utility Model Content

[0006] In view of this, the purpose of this utility model is to propose a dry fog dust suppression system for steelmaking slag pits in order to solve the technical problems in the prior art.

[0007] To achieve the above objectives, this utility model provides a dry fog dust suppression system for steelmaking slag pits, including a water system, with atomizing nozzles connected to the end of the water system, and a water solenoid valve installed on the water system. It also includes an air system.

[0008] The air circuit system includes a main air source and a backup air source. Both the main air source and the backup air source are connected to the main air circuit, and an air solenoid valve is provided at the end of the main air circuit. The outlet of the air solenoid valve is directly connected to the atomizing nozzle through a branch air circuit.

[0009] The main air path upstream of the air solenoid valve is connected to another branch air path, which is connected to the water system. The connection point is located at the outlet end of the water solenoid valve, and the branch air path is also equipped with a ball valve and a purge solenoid valve.

[0010] Furthermore, the water system includes a main water source and a backup water source, wherein the main water source is clean circulating water and the backup water source is turbid circulating water; the main water source is connected to the water system through ball valve four, and the backup water source is connected to the water system through ball valve five.

[0011] Furthermore, a Y-type filter is provided in the water circuit, with differential pressure sensors connected to both ends of the Y-type filter. A water circuit pressure reducing valve is provided downstream of the Y-type filter, and a water circuit solenoid valve is provided downstream of the water circuit pressure reducing valve. A pressure gauge is also provided between the water circuit pressure reducing valve and the water circuit solenoid valve.

[0012] Furthermore, the main air source and the backup air source are connected to the main air circuit through ball valve one and ball valve two, respectively. An air filter is provided on the main air circuit, and an air pressure reducing valve is provided downstream of the air filter. A pressure gauge is provided downstream of the air pressure reducing valve.

[0013] Furthermore, the atomizing nozzles are provided in several quantities and are evenly arranged on the side of the steelmaking slag pool, and each atomizing nozzle is equipped with an angle adjustment mechanism.

[0014] Furthermore, a ball valve is provided at the connection between the branch air path at the outlet end of the air solenoid valve and each atomizing nozzle.

[0015] Furthermore, a ball valve is provided at the connection point between the water system and each atomizing nozzle.

[0016] Furthermore, the angle adjustment mechanism includes a nozzle support and a cylinder. The rear end of the atomizing nozzle is rotatably connected to the nozzle support, the cylinder is fixedly connected to the lower end of the nozzle support, and the output shaft of the cylinder is connected to the front side of the atomizing nozzle.

[0017] The beneficial effects of this utility model are as follows: 1. By adding an air path system to the existing dry fog dust suppression water path system of the steelmaking slag pool, the air path system delivers high-speed airflow to the atomizing nozzle, so that the water flow is more thoroughly atomized after passing through the atomizing nozzle, and the sprayed water mist range is larger, thereby improving the dust suppression effect on the slag pool.

[0018] 2. One branch gas path in the gas path system is connected to the water path system, and this branch gas path is connected to the outlet end of the water path solenoid valve. After the dry fog dust suppression operation is completed and the water path solenoid valve is closed, the branch gas path will deliver a high-speed airflow to the water path system downstream of the water path solenoid valve to blow away the residual water in the water path system and prevent the water from flowing into the steelmaking slag pool and causing an explosion.

[0019] 3. The atomizing nozzle can be angled, which can further adjust the spray range and optimize the dust suppression effect.

[0020] 4. A backup water source is provided in the water system, using turbid circulating water. A backup air source is also provided in the air system. When the pressure of the main water source and the main air source does not meet the requirements, the backup water source and air source can be activated to ensure the normal operation of the entire dry fog dust suppression system. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram illustrating the principle of the dry fog dust suppression system of this utility model.

[0023] Figure 2 This is a schematic diagram of the spray structure of the steelmaking slag trap in this utility model.

[0024] Figure 3 This is a schematic diagram of the atomizing nozzle part in this utility model.

[0025] Figure 4 for Figure 3 Enlarged view of section A.

[0026] The diagram is marked as follows:

[0027] 1. Ball valve one; 2. Air filter; 3. Air pressure reducing valve; 4. Pressure gauge one; 5. Air solenoid valve; 6. Ball valve two; 7. Ball valve three; 8. Purge solenoid valve; 9. Ball valve four; 10. Y-type filter; 11. Water pressure reducing valve; 12. Water solenoid valve; 13. Pressure gauge two; 14. Differential pressure sensor; 15. Ball valve five; 16. Ball valve six; 17. Ball valve seven; 18. Atomizing nozzle; 19. Quick-release F-type metal hose; 20. Steelmaking slag tank; 21. Connecting sleeve; 22. Nozzle stand; 23. Cylinder. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The first aspect of this utility model is as follows: Figure 1 As shown, this solution includes a water system and an air system. By adding an air system to the existing dry fog dust suppression water system in the steelmaking slag pool, the air system delivers high-speed airflow to the atomizing nozzle 18, making the water flow more thoroughly atomized after passing through the atomizing nozzle 18, and the sprayed water mist has a larger range, thus improving the dust suppression effect on the slag pool.

[0031] In this water system, the main water source is connected to the water circuit via ball valve 4 (9), and the backup water source is connected via ball valve 5 (15). The main water source is clean circulating water, and the backup water source is turbid circulating water. A Y-type filter 10 is installed in the water circuit, with differential pressure sensors 14 connected to both ends of the Y-type filter 10. A water circuit pressure reducing valve 11 is installed downstream of the Y-type filter 10, and a water circuit solenoid valve 12 is installed downstream of the water circuit pressure reducing valve 11. A pressure gauge 2 (13) is also installed between the water circuit pressure reducing valve 11 and the water circuit solenoid valve 12.

[0032] The main air source and backup air source in the air circuit system are connected to the main air circuit through ball valve 1 and ball valve 6, respectively. An air filter 2 is installed in the main air circuit, and an air pressure reducing valve 3 is installed downstream of the air filter 2. A pressure gauge 4 is installed downstream of the air pressure reducing valve 3. An air solenoid valve 5 is installed at the end of the main air circuit. The outlet of the air solenoid valve 5 is directly connected to the atomizing nozzle 18 through a branch air circuit. The water circuit system terminal is also connected to the atomizing nozzle 18.

[0033] Preferably, the main air path upstream of the air solenoid valve 5 is connected to another branch air path, which is connected to the water system, and the connection point is located at the outlet end of the water solenoid valve 12. The branch air path is also equipped with a ball valve 3 7 and a purge solenoid valve 8.

[0034] After the dry fog dust suppression operation is completed, when the water circuit solenoid valve 12 is closed, the branch air circuit will deliver a high-speed airflow to the water circuit system downstream of the water circuit solenoid valve 12 to blow away the residual water in the water circuit system and prevent the water from flowing into the steelmaking slag pool and causing an explosion.

[0035] The second aspect of this utility model is as follows: Figure 2 , Figure 3 and Figure 4 As shown, several atomizing nozzles 18 are provided and evenly distributed on the side of the steelmaking slag pool. Each atomizing nozzle 18 is equipped with an angle adjustment mechanism. A ball valve 6 16 is provided at the connection point between the branch air path at the outlet end of the air solenoid valve 5 and each atomizing nozzle 18. Similarly, a ball valve 7 17 is provided at the connection point between the water system and each atomizing nozzle 18.

[0036] The angle adjustment mechanism includes a nozzle mount 22 and a cylinder 23. The rear end of the atomizing nozzle 18 is rotatably connected to the nozzle mount 22, and the cylinder 23 is fixedly connected to the lower end of the nozzle mount 22. The output shaft of the cylinder 23 is connected to the front side of the atomizing nozzle 18. The up-and-down extension of the output shaft of the cylinder 23 controls the rotation of the atomizing nozzle 18 with its rear end as the center, thereby achieving angle adjustment. By adjusting the angle of the atomizing nozzle 18, the spray range can be further adjusted to optimize the dust suppression effect.

[0037] Preferably, a connecting sleeve 21 is fixedly connected to the side of the steelmaking slag pool 20 where the atomizing nozzle 18 is located, and each atomizing nozzle 18 is connected to the connecting sleeve 21 through a quick-release F-type metal hose 19. All pipelines in the entire water system and air system are contained in the connecting sleeve 21 and the quick-release F-type metal hose 19, ensuring that the entire system is neat and orderly and will not be disordered.

[0038] Example:

[0039] Before use, check whether the pressure of the connected gas source and the connected clean circulating water is normal, whether the backup gas and water sources need to be activated, and open ball valve 6.16 and ball valve 7.17.

[0040] After confirming that there are no problems, first turn on the air system:

[0041] First, open ball valve 1 and air solenoid valve 5; then adjust air pressure reducing valve 3 and observe pressure gauge 4 to stabilize the output air pressure at 0.5-0.6 MPa and the flow rate at approximately 500 L / min. Compressed air passes through air filter 2 and begins purging the water system for about 5 seconds.

[0042] Then turn on the air system:

[0043] First, open ball valve 4 (9) and water pressure reducing valve 11 to allow the clean circulating water to pass through Y-type filter 10; during this process, observe differential pressure sensor 14 to prevent Y-type filter 10 from becoming clogged. After passing through water pressure reducing valve 11, stabilize the output water pressure at 0.7-0.8 MPa and the flow rate at approximately 100 L / h.

[0044] As clean circulating water enters the atomizing nozzle 18, dry fog dust suppression begins. Check whether the atomizing nozzle 18 is spraying normally and whether the droplets are fine and uniform. The angle and range of the atomizing nozzle 18 can be adjusted as needed.

[0045] After the dry fog dust suppression process is complete, first shut down the clean water system, closing ball valve 7 (17), water circuit solenoid valve 12, and ball valve 4 (9). Then open ball valve 3 (7) and purge solenoid valve 8, using compressed air to purge the pipeline for 30 seconds to dry the water system. Next, shut down the air system, simultaneously closing air solenoid valve 5, purge solenoid valve 8, ball valve 1 (1), and ball valve 3 (7).

[0046] During implementation, if the pressure of the gas source or the clean circulating water does not meet the requirements, open ball valve 26 and ball valve 515 to use the backup gas source and backup water (turbid circulating water).

[0047] In summary, this invention adds an air path system to the existing dry fog dust suppression water system in the steelmaking slag pool. This air path system delivers a high-speed airflow to the atomizing nozzles 18, resulting in more thorough atomization of the water flow and a wider spray range, thus improving the dust suppression effect in the slag pool. One branch air path in the air path system connects to the water system and is connected to the outlet of the water solenoid valve 12. After the dry fog dust suppression operation is completed and the water solenoid valve 12 is closed, the branch air path delivers a high-speed airflow to the water system downstream of the solenoid valve 12, cleaning up any remaining water in the water system and preventing water from flowing into the steelmaking slag pool and causing an explosion.

[0048] The atomizing nozzle 18 has an adjustable angle, which can be used to further adjust the spray range and optimize the dust suppression effect. A backup water source, using circulating turbid water, is provided in the water system, and a backup air source is also provided in the air system. When the pressure of the main water and air sources is insufficient, the backup water and air sources can be activated to ensure the normal operation of the entire dry fog dust suppression system.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples. Under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0050] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dry fog dust suppression system for steelmaking slag pits, comprising a water system, wherein the terminal of the water system is connected to an atomizing nozzle (18), and the water system is equipped with a water solenoid valve (12), characterized in that, It also includes the gas system: The air circuit system includes a main air source and a backup air source. Both the main air source and the backup air source are connected to the main air circuit. An air solenoid valve (5) is provided at the end of the main air circuit. The outlet of the air solenoid valve (5) is directly connected to the atomizing nozzle (18) through a branch air circuit. The main air path upstream of the air solenoid valve (5) is connected to another branch air path, which is connected to the water system. The connection point is located at the outlet end of the water solenoid valve (12). The branch air path is also equipped with a ball valve (7) and a purge solenoid valve (8).

2. The dry fog dust suppression system for steelmaking slag pits according to claim 1, characterized in that, The water system includes a main water source and a backup water source, wherein the main water source is clean circulating water and the backup water source is turbid circulating water; the main water source is connected to the water system through ball valve four (9) and the backup water source is connected to the water system through ball valve five (15).

3. The dry fog dust suppression system for steelmaking slag pits according to claim 2, characterized in that, A Y-type filter (10) is provided on the water path. Differential pressure sensors (14) are connected to both ends of the Y-type filter (10). A water pressure reducing valve (11) is provided on the downstream side of the Y-type filter (10). A water solenoid valve (12) is provided on the downstream side of the water pressure reducing valve (11). A pressure gauge (13) is also provided between the water pressure reducing valve (11) and the water solenoid valve (12).

4. The dry fog dust suppression system for steelmaking slag pits according to claim 1, characterized in that, The main gas source and the backup gas source are connected to the main gas circuit through ball valve one (1) and ball valve two (6) respectively. An air filter (2) is provided on the main gas circuit. An air pressure reducing valve (3) is provided on the downstream side of the air filter (2). A pressure gauge one (4) is provided on the downstream side of the air pressure reducing valve (3).

5. The dry fog dust suppression system for steelmaking slag pits according to claim 1, characterized in that, The atomizing nozzles (18) are provided in several units and are evenly arranged on the side of the steelmaking slag pool. Each atomizing nozzle (18) is equipped with an angle adjustment mechanism.

6. The dry fog dust suppression system for steelmaking slag pits according to claim 5, characterized in that, A ball valve (16) is provided at the connection between the branch air path at the outlet end of the air solenoid valve (5) and each atomizing nozzle (18).

7. A dry fog dust suppression system for steelmaking slag pits according to claim 5, characterized in that, A ball valve (17) is provided at the connection between the water system and each atomizing nozzle (18).

8. A dry fog dust suppression system for steelmaking slag pits according to claim 5, characterized in that, The angle adjustment mechanism includes a nozzle stand (22) and a cylinder (23). The rear end of the atomizing nozzle (18) is rotatably connected to the nozzle stand (22), and the cylinder (23) is fixedly connected to the lower end of the nozzle stand (22). The output shaft of the cylinder (23) is connected to the front side of the atomizing nozzle (18).

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