Water-gas mixing automatic adjusting type yellow phosphorus slag water-quenched slag granulating system

Abstract

The utility model discloses a water-gas mixing automatic regulation type yellow phosphorus slag water-quenched slag granulation system, which comprises a water supply system, a gas supply system, a submerged arc furnace and a granulator, the gas supply system comprises an air compressor, a pressure tank and a gas pipe, one end of the gas pipe is communicated with the granulator, the air compressor and the pressure tank are connected with each other through the gas pipe, a one-way valve is arranged between the pressure tank and the air compressor, and the one-way valve is connected with the granulator. An air pressure adjusting system is arranged between the granulator and the pressure tank; the water supply system comprises a sedimentation tank, a water pump, a vacuum pump and a water pressure adjusting system which are sequentially communicated through water pipes; a filter is arranged between the sedimentation tank and the water pump; one ends of the water supply system and the gas supply system are jointly communicated with the granulator, and a cleaning system is arranged between the water supply system and the gas supply system; the granulator is arranged below the slag chute to impact the slag water for granulation; according to the utility model, the gas supply system and the water supply system are matched to supply gas and water to the pelletizer to form a water-gas mixture, and the water-gas mixture is sprayed out by the pelletizer to carry out slag quenching and pelletizing on yellow phosphorus slag water flowing out of the slag chute.

Description

Technical Field

[0001] This utility model belongs to the field of liquid slag water quenching slag granulation technology, and specifically relates to a water-air mixing automatic adjustment yellow phosphorus slag water quenching slag granulation system. Background Technology

[0002] The production of yellow phosphorus produces yellow phosphorus slag water, which contains harmful substances. If it is directly discharged into the soil, it will change the soil's chemical properties, damage the soil's structure and fertility. If it is directly discharged into the water, it will damage the aquatic ecosystem.

[0003] There are various process methods for treating yellow phosphorus slag water, among which air quenching granulation is a commonly used method. High-pressure air impacts the yellow phosphorus slag water to disperse, cool, and granulate it. In addition, in order to achieve rapid cooling and improve the granulation effect, air and water can be mixed for impact, and air quenching treatment can be carried out by combining air and water. This includes controlling the production of rock wool by adjusting the pressure and flow rate of water and compressed air, thereby improving the economic benefits of granulated phosphorus slag.

[0004] After searching, the existing technology publication number CN118186154A describes a horizontal slag granulation process and device with gas-liquid mixing; this scheme uses a gas-liquid mixing impact slag granulation method.

[0005] The prior art publication number CN111979366A describes a liquid steel slag air quenching granulation production line and its production process. This solution uses air quenching for granulation. The compressed air source directly acts on the supersonic gas injector in the granulator through the air pipeline, thereby enabling the airflow to carry out a concentrated air quenching granulation process on the liquid steel slag.

[0006] Although combining air quenching and water quenching can form a misting impact granulation scheme that combines air and water, the addition or use of water quenching will produce scale, which will reduce the water flow rate and flow rate, thereby affecting the water quenching effect or the air-water mixing effect, and thus affecting the granulation effect.

[0007] Therefore, this utility model provides a yellow phosphorus slag water-quenched slag granulation system that can automatically clean while combining water quenching, ensuring granulation quality and avoiding the generation of rock wool. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a water-air mixing automatic regulating yellow phosphorus slag granulation system. By combining an air supply system and a water supply system, a mixture of air and water is formed at the granulator and sprayed out to impact the yellow phosphorus slag water. This not only disperses and cools the slag but also encapsulates the granules with water, increasing the cooling rate, ensuring granulation quality, and preventing the formation of rock wool. Furthermore, a cleaning system can clean the scale in the water tank to ensure normal water output.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0010] An automatic water-air mixing and regulating yellow phosphorus slag granulation system includes a water supply system, an air supply system, a submerged arc furnace, and a granulator. The air supply system includes an air compressor, a pressure tank, and air pipes. One end of the air pipes is connected to the granulator. The air compressor and pressure tank are interconnected via the air pipes. A one-way valve is provided between the pressure tank and the air compressor. An air pressure regulating system is provided between the granulator and the pressure tank. The water supply system includes a sedimentation tank, a water pump, a vacuum pump, and a water pressure regulating system, which are connected sequentially via water pipes. A filter is provided between the sedimentation tank and the water pump. The water supply system and the air supply system are connected to the granulator at one end. A cleaning system is provided between the water supply system and the air supply system. The submerged arc furnace is connected to a slag chute to discharge slag water. The granulator is located below the slag chute and impacts the slag water to granulate it. A granulation chamber is provided on one side of the granulator for collecting granules.

[0011] The gas and water supply systems work together to supply gas and water to the granulator to form a water-gas mixture, which is then sprayed out by the granulator to quench and granulate the yellow phosphorus slag water flowing out of the slag chute.

[0012] The granulator includes a housing with a nozzle on one side. Inside the housing, a partition divides the housing into a water tank and an air chamber. A main air inlet pipe is located on one side of the housing and connects to the air chamber. A main water inlet pipe is located on the top of the housing, and a secondary water inlet pipe is located on the main water inlet pipe and connects to the water tank. A guide plate is located inside the air chamber to guide the air entering through the main air inlet pipe and concentrate it towards the nozzle. A spray pipe is located inside the housing, connecting the water tank and the air chamber. One end of the spray pipe is fitted inside the nozzle to allow a mixture of air and water to be sprayed out from the nozzle.

[0013] The water tank is equipped with drain outlets on both sides for cleaning and draining scale and sewage.

[0014] The main air intake pipe is equipped with a secondary air intake pipe and is connected to the main water intake pipe to form a cleaning system; the main air intake pipe is connected to the air pipe in the air supply system; the water pipe in the water supply system is connected to the main water intake pipe.

[0015] The processing steps of the yellow phosphorus slag water-quenched slag granulation system are as follows:

[0016] 1) Slag and slag discharge: The yellow phosphorus slag and slag in the electric arc furnace are discharged through the slag chute, and then the yellow phosphorus slag and slag are quenched and granulated by the water and air mixture in the granulator. The granulation chamber stores the granules, and the solid particle size of the granules in the quenched slag granulator is 1-3mm. The smelting cycle of the electric arc furnace is 3 hours, and the slag discharge is 45-55t each time. The slag guiding speed of the slag chute is 1-1.2t / min. The vertical distance between the granulator and the end of the slag chute is 0.5-1.5m. The angle between the nozzle spray direction and the horizontal direction is 0-35° through the setting and adjustment of the box body.

[0017] 2) High-pressure gas introduction: Gas is supplied by an air compressor, and a one-way valve controls the gas to enter the pressure tank. Then, the air pressure regulation system controls the intake pressure of the air pipe and the main air intake pipe, controlling the compressed air pressure to 0.2-0.4 MPa, and the air volume of the gas nozzle is adjusted to 10-35 m³ / min. At the same time, the yellow phosphorus slag water is blown by the high-speed airflow mixed with water and air, and flies to a vertical height of 10-15 m. After landing, the horizontal distance from the bottom of the slag chute is 10-35 m.

[0018] 3) Water introduction: Cooling water from the sedimentation tank is drawn by a water pump, then filtered by a filter and enters a vacuum pump. The water pressure is then controlled by a water pressure regulation system, and then the water enters the tank through a water pipe connected to the main inlet pipe. The water is then sprayed through a nozzle connected to the air chamber to form a water-air mixture with high-pressure gas and sprayed out to impact the yellow phosphorus slag water. The water pressure is controlled at 0.4-0.6 MPa.

[0019] 4) Scale removal inside the tank: After long-term operation, a large amount of scale will adhere to the inner wall of the water tank, which will affect the water flow. Therefore, scale removal is required. During cleaning, first close the main water inlet pipe, then open the auxiliary air inlet pipe and connect it to the auxiliary water inlet pipe to introduce air to impact the water tank and spray pipe. Open the drain port to discharge the blown-off scale. The difference is that during the normal granulation process, the auxiliary air inlet pipe needs to be closed, and the main air inlet pipe, main water inlet pipe and auxiliary water inlet pipe need to be opened to enter the tank to form an air-water mixture for impact granulation. This process is controlled by an external PLC automatic control system.

[0020] The advantages of this utility model compared with the prior art are as follows:

[0021] By combining the air supply system and the water supply system, a mixture of air and water is sprayed out at the granulator to impact the yellow phosphorus slag. This not only disperses and cools the slag, but also encapsulates the granules with the water, increasing the cooling rate, ensuring granulation quality, and preventing the formation of rock wool. Furthermore, the cleaning system removes scale from the water tank to ensure normal water output and maintains the correct air-water mixing ratio. This prevents damage to the granulator from steel slag and water quality, greatly improving the air quenching effect of the granulator and reducing the risk of nozzle blockage by scale, thus ensuring smooth flow of cooling water.

[0022] During cleaning, first close the main water inlet pipe, then open the auxiliary air inlet pipe and connect it to the auxiliary water inlet pipe to introduce air to impact the water tank and spray pipe. Open the drain port to discharge the blown-off scale. In contrast, during normal granulation, the auxiliary air inlet pipe needs to be closed, and the main air inlet pipe, main water inlet pipe, and auxiliary water inlet pipe need to be opened to enter the tank to form an air-water mixture for impact granulation. This process can be controlled by an externally connected PLC automatic control system, which is simple and quick. Attached Figure Description

[0023] AppendixFigure 1 This is a schematic diagram of the structure of a water-air mixing automatic regulating yellow phosphorus slag water quenching granulation system according to this utility model;

[0024] Appendix Figure 2 This is a schematic diagram of the granulator structure;

[0025] Appendix Figure 3 This is a schematic diagram of the cross-sectional structure of the box;

[0026] Appendix Figure 4 This is a schematic diagram of the internal structure of the granulator. Figure 1 ;

[0027] Appendix Figure 5 This is a schematic diagram of the internal structure of the granulator. Figure 2 ;

[0028] Appendix Figure 6 This is a schematic diagram of the internal structure of the granulator. Figure 3 ;

[0029] In the diagram: 1. Submerged arc furnace; 2. Slag chute; 3. Granulator; 4. Granulation chamber; 5. Sedimentation tank; 6. Filter; 7. Water pump; 8. Vacuum pump; 9. Water pressure regulation system; 10. Air compressor; 11. Check valve; 12. Pressure tank; 13. Air pressure regulation system; 14. Cleaning system; 15. Water pipe; 16. Air pipe; 31. Housing; 311. Baffle plate; 312. Nozzle; 313. Spray pipe; 314. Guide plate; 32. Water tank; 321. Drain outlet; 33. Air chamber; 34. Main water inlet pipe; 341. Auxiliary water inlet pipe; 35. Main air inlet pipe; 351. Auxiliary air inlet pipe. Detailed Implementation

[0030] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-6 The technical solution of this utility model will be further described in detail below.

[0031] Example 1:

[0032] An automatic water-air mixing and regulating yellow phosphorus slag granulation system includes a water supply system, an air supply system, a submerged arc furnace 1, and a granulator 3. The air supply system includes an air compressor 10, a pressure tank 12, and an air pipe 16. One end of the air pipe 16 is connected to the granulator 3. The air compressor 10 and the pressure tank 12 are interconnected through the air pipe 16. A one-way valve 11 is provided between the pressure tank 12 and the air compressor 10. An air pressure regulating system 13 is provided between the granulator 3 and the pressure tank 12. The water supply system includes a sedimentation tank 5, a water pump 7, a vacuum pump 8, and a water pressure regulating system 9, which are connected sequentially through a water pipe 15. A filter 6 is provided between the sedimentation tank 5 and the water pump 7. The water supply system and the air supply system are connected to the granulator 3 at one end. A cleaning system 14 is provided between the water supply system and the air supply system. The submerged arc furnace 1 is connected to a slag chute 2 to discharge slag water. The granulator 3 is located below the slag chute 2 to impact the slag water for granulation. A granulation chamber 4 is provided on one side of the granulator 3 for collecting granules.

[0033] The gas and water supply systems work together to supply gas and water to the granulator 3 to form a water-gas mixture, which is then sprayed out by the granulator 3 to quench and granulate the yellow phosphorus slag water flowing out of the slag chute 2.

[0034] The granulator 3 includes a housing 31, with a nozzle 312 on one side of the housing 31. Inside the housing 31, a partition 311 divides the housing 31 into a water tank 32 and an air chamber 33. A main air inlet pipe 35 is provided on one side of the housing 31 and connects to the air chamber 33. A main water inlet pipe 34 is provided at the top of the housing 31, and a secondary water inlet pipe 341 is provided on the main water inlet pipe 34 and connects to the water tank 32. A guide plate 314 is provided inside the air chamber 33 to guide the air in the main air inlet pipe 35 and concentrate it towards the nozzle 312. A spray pipe 313 is provided inside the housing 31, connecting the water tank 32 and the air chamber 33. One end of the spray pipe 313 is fitted inside the nozzle 312 to allow the nozzle 312 to spray out a mixture of air and water.

[0035] The water tank 32 is provided with drain outlets 321 on both sides for cleaning and draining.

[0036] The main air intake pipe 35 is provided with a secondary air intake pipe 351 and is connected to the main water intake pipe 34 to form a cleaning system; the main air intake pipe 35 is connected to the air pipe 16 in the air supply system; the water pipe 15 in the water supply system is connected to the main water intake pipe 34.

[0037] The processing steps of the yellow phosphorus slag water-quenched slag granulation system are as follows:

[0038] 1) Slag and water discharge: The yellow phosphorus slag and water in the electric arc furnace 1 are discharged through the slag chute 2, and then the yellow phosphorus slag and water are quenched and granulated by the water and air mixture in the granulator 3. The granulation chamber 4 stores the granules. The solid particle size of the granules in the quenched slag granulator 3 is 1mm. The smelting cycle of the electric arc furnace 1 is 3 hours, and the slag discharge is 50t each time. The slag guiding speed of the slag chute 2 is 1t / min. The vertical distance between the granulator 3 and the end of the slag chute 2 is 1m. The angle between the spray direction of the nozzle 312 and the horizontal direction is 25° by setting and adjusting the box 31.

[0039] 2) High-pressure gas introduction: Air is supplied through air compressor 10, and one-way valve 11 controls the gas to enter pressure tank 12. Then, the air pressure is controlled by air pressure regulation system 13 to control the air pressure of air pipe 16 and main air inlet pipe 35, and the compressed air pressure is controlled to 0.2Mpa. The air volume of gas nozzle is adjusted to 10m³ / min. At the same time, the yellow phosphorus slag water is blown by the high-speed airflow mixed with water and air and flies to a vertical height of 10m. After landing, the horizontal distance from the bottom of the slag chute is 25m.

[0040] 3) Water introduction: Cooling water from sedimentation tank 5 is drawn by water pump 7, filtered by filter 6 and then enters vacuum pump 8. The water pressure is controlled by water pressure regulation system 9, and then enters tank 31 through water pipe 15 connected to main inlet pipe 34. Water is then sprayed out through spray pipe 313 connected to air chamber 33 to form a water-air mixture with high pressure gas and sprayed out to impact yellow phosphorus slag water; the water pressure is controlled at 0.4 MPa.

[0041] 4) Cleaning scale inside the tank: After long-term operation, a large amount of scale will adhere to the inner wall of the water tank, which will affect the water flow. Therefore, scale removal is required. During cleaning, first close the main water inlet pipe 34 to allow water to enter, then open the auxiliary air inlet pipe 351 and connect it to the auxiliary water inlet pipe 341 to allow air to enter and impact the water tank 32 and the spray pipe 313. The drain port 321 is opened to discharge the blown-off scale. The difference is that during the normal granulation process, the auxiliary air inlet pipe 351 needs to be closed, and the main air inlet pipe 35, the main water inlet pipe 34, and the auxiliary water inlet pipe 341 need to be opened to enter the tank 31 to form an air-water mixture for impact granulation. This process is controlled by an externally installed PLC automatic control system.

[0042] Example 2:

[0043] The difference compared to Example 1 is:

[0044] 1) In the slag and water discharge step: the solid particle size of the slag granulator 3 is 2mm; the slag discharge speed of the slag chute 2 is 1.1t / min.

[0045] 2) In the high-pressure gas introduction step: air is supplied through air compressor 10, the compressed air pressure is controlled at 0.3Mpa, and the air volume of the gas nozzle is adjusted to 25m³ / min.

[0046] 3) During the water introduction step: control the water pressure to 0.5 MPa.

[0047] Example 3:

[0048] The difference compared to Example 2 is:

[0049] 1) In the slag and water discharge step: the solid particle size of the quenched slag granulator 3 is 3mm; the slag discharge speed of the slag chute 2 is 1.2t / min.

[0050] 2) In the high-pressure gas introduction step: air is supplied through air compressor 10, the compressed air pressure is controlled at 0.4Mpa, and the air volume of the gas nozzle is adjusted to 35m³ / min.

[0051] 3) During the water introduction step: control the water pressure to 0.6 MPa.

[0052] Test Example 1:

[0053] The difference compared to Example 1 is:

[0054] 1) In the slag and water discharge step: the solid particle size of the slag granulator 3 is 0.8mm; the slag discharge speed of the slag chute 2 is 0.8t / min.

[0055] 2) In the high-pressure gas introduction step: air is supplied through air compressor 10, the compressed air pressure is controlled at 0.18Mpa, and the air volume of the gas nozzle is adjusted to 8m³ / min.

[0056] 3) During the water introduction step: control the water pressure at 0.38 MPa.

[0057] Test Example 2:

[0058] The difference compared to Example 1 is:

[0059] 1) In the slag and water discharge step: the solid particle size of the slag granulator 3 is 3.5mm; the slag discharge speed of the slag chute 2 is 1.28t / min.

[0060] 2) In the high-pressure gas introduction step: air is supplied through air compressor 10, the compressed air pressure is controlled at 0.45Mpa, and the air volume of the gas nozzle is adjusted to 38m³ / min.

[0061] 3) During the water introduction step: control the water pressure to 0.65 MPa.

[0062] Bead diameter (mm) air pressure MPa air volume m³ / min water pressure MPa Rock wool (whether it is produced) Example 1 1 0.2 10 0.4 none Example 2 2 0.3 25 0.5 none Example 3 3 0.4 35 0.6 none Test Example 1 0.8 0.18 8 0.38 less Test Example 2 3.5 0.45 38 0.65 large amount

[0063] Based on the comparison of the data in the table above, it can be seen that in Examples 1-3, when the water pressure is 0.4-0.6 MPa and the air pressure is 0.2-0.4 MPa, the particle size of the air-quenched beads is 1-3 mm, and the air volume is 10-35 m³ / min. At this time, air quenching can be carried out normally and qualified beads can be produced, which meets the air quenching requirements of yellow phosphorus slag.

[0064] In test examples 1-2, when the water pressure is less than 0.4 MPa and greater than 0.6 MPa, and the air pressure is less than 0.2 MPa and greater than 0.4 MPa, the diameter of the air-quenched beads is less than 1 mm or greater than 3 mm, and the air volume is less than 10 m³ / min and greater than 35 m³ / min. Although air quenching can be achieved, the resulting beads are either too large or too small, and unnecessary rock wool is also produced. Therefore, when the water pressure, air pressure, or air velocity are too high or too low, air quenching can be achieved within the above ranges, but not only will the bead diameter be too large or too small, resulting in non-compliance, but corresponding rock wool will also be produced, which does not meet the requirements for air quenching.

[0065] In the description of this utility model, unless otherwise stated, the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0066] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A water-air mixing automatic regulating yellow phosphorus slag water-quenched slag granulation system, comprising a water supply system, an air supply system, a submerged arc furnace, and a granulator, characterized in that... The air supply system includes an air compressor, a pressure tank, and air pipes. One end of the air pipes connects to the granulator. The air compressor and pressure tank are interconnected via air pipes. A one-way valve is installed between the pressure tank and the air compressor. An air pressure regulating system is installed between the granulator and the pressure tank. The water supply system includes a sedimentation tank, a water pump, a vacuum pump, and a water pressure regulating system, all connected sequentially via water pipes. A filter is installed between the sedimentation tank and the water pump. The water supply system and the air supply system are connected to the granulator at one end. A cleaning system is installed between the water supply system and the air supply system. The submerged arc furnace is connected to a slag chute to discharge slag water. The granulator is located below the slag chute and impacts the slag water to granulate it. A granulation chamber is located on one side of the granulator to collect the granules. The air supply system and the water supply system work together to supply air and water to the granulator to form a water-air mixture, which is then sprayed out by the granulator to quench and granulate the yellow phosphorus slag water flowing out of the slag chute. The granulator includes a housing with a nozzle on one side. Inside the housing, a partition divides the housing into a water tank and an air chamber. A main air inlet pipe is located on one side of the housing and connects to the air chamber. A main water inlet pipe is located on the top of the housing, and a secondary water inlet pipe is located on the main water inlet pipe and connects to the water tank. A guide plate is located inside the air chamber to guide the air entering through the main air inlet pipe and concentrate it towards the nozzle. A spray pipe is located inside the housing, connecting the water tank and the air chamber. One end of the spray pipe is fitted inside the nozzle to allow a mixture of air and water to be sprayed out from the nozzle.

2. The water-air mixing automatic regulating yellow phosphorus slag water-quenching granulation system according to claim 1, characterized in that... The water tank is equipped with drain outlets on both sides for cleaning and draining scale and sewage.

3. The water-air mixing automatic regulating yellow phosphorus slag water quenching granulation system according to claim 1, characterized in that... The main air intake pipe is equipped with a secondary air intake pipe and is connected to the main water intake pipe to form a cleaning system; the main air intake pipe is connected to the air pipe in the air supply system; the water pipe in the water supply system is connected to the main water intake pipe.

Images