A yellow phosphorus water slag flushing system

Abstract

The application discloses a yellow phosphorus water slag flushing system, which comprises a chute, a slag flushing device, a slag bin, a circulating water pool, a water inlet pipe, a slag flushing pipe and a backflow pipe, a slag flushing pool is arranged at the bottom of the slag flushing device, a chimney is arranged at the top of the slag flushing device, a condensation heat exchanger is arranged in the slag flushing device, the chute is arranged at the lower part of the slag flushing device, the circulating water pool is communicated with the slag flushing pool through the water inlet pipe, and the slag flushing pool is communicated with the slag bin through the slag flushing pipe. Compared with the prior art, the application overturns the original treatment method of yellow phosphorus waste slag, the slag flushing device designed in the system forms circulating cooling water in the slag flushing pool, waste slag cannot be accumulated in the slag flushing device, the land occupation area is greatly reduced, the heat in steam can be recycled through the condensation heat exchange gas, the condensed water can be recycled and utilized after condensation, the labor intensity is reduced, and the safe operation system of the system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of yellow phosphorus preparation, and particularly relates to a yellow phosphorus water slag flushing system. BACKGROUND

[0002] At present, yellow phosphorus production in China is mostly single-taun annual production of 10,000 tons of unit equipment, which is large in equipment and occupies a large area. In the process of yellow phosphorus production, the phosphorus ore is heated to form slag, i.e. waste slag. About 8-10 tons of waste slag is generated per ton of yellow phosphorus produced. The amount of waste slag is large, and the waste slag is in a high-temperature molten state of 1300 DEG C. At present, the waste slag is usually directly flowed into a waste slag cooling pool through a chute, and then a set of grab car equipment is built above the waste slag cooling pool, and a slag bucket is built near the waste slag cooling pool. After the waste slag is cooled by water, the cooled waste slag is grabbed into the slag bucket by the grab car equipment, and then a transport vehicle is driven into the slag bucket below to discharge the waste slag from the slag bucket into the transport vehicle and pull away.

[0003] Problems existing in the current waste slag treatment method are as follows:

[0004] 1. Since the waste slag from the yellow phosphorus furnace is in a high-temperature molten state of 1300 DEG C, a large amount of high-temperature and high-pressure steam is generated after the waste slag is cooled by water. Since the waste slag cooling pool is open to the air, the high-temperature heat energy of the waste slag is completely lost through a large amount of water vapor, and cannot be effectively recycled.

[0005] 2. Since the temperature of the waste slag from the yellow phosphorus furnace is as high as 1300 DEG C, and the temperature of the cooling water is low, the temperature difference between the two is very large. After the high-temperature waste slag of the yellow phosphorus furnace is cooled by water, it will be rapidly cooled and cracked into small particles, and the larger particles are as small as peas. Since the cracked waste slag particles are small, it is difficult for the grab bucket to grab all the waste slag from the cooling pool, and it is necessary to stop the water after the waste slag is discharged, and then manually clean the waste slag in the waste slag cooling pool.

[0006] 3. Since the volume of the waste slag cooling pool is large, although water is continuously supplied, the flow speed of the water body is slow, and the position of the waste slag entering the waste slag cooling pool through the chute is fixed. A large amount of cooling water is needed to fully cool the waste slag at the waste slag outlet. The waste slag cannot be cleaned in time, and the continuously falling high-temperature waste slag will generate a large amount of steam to push away the cooling water, so that the cooling water cannot be in time with the high-temperature waste slag. The waste slag is molten together, and then it is very easy to explode when it meets water. In order to prevent explosion, the current method is to increase the size and depth of the waste slag cooling pool as much as possible to increase the water storage capacity, so the volume of the waste slag pool is also getting larger and larger. SUMMARY

[0007] The present application provides a yellow phosphorus water slag flushing system which solves the above problems.

[0008] In order to achieve the above object, the technical scheme adopted by the present application is: a yellow phosphorus water slag flushing system, comprising a chute, a slag flushing device, a slag bin, a circulating water pool, a water inlet pipe, a slag flushing pipe and a backflow pipe, the bottom of the slag flushing device is provided with a slag flushing pool, the top of the slag flushing device is provided with a chimney, the slag flushing device is provided with a condenser, the chute is located below the slag flushing device, and the slag outlet of the chute is located directly above the slag flushing pool, the circulating water pool is communicated with the slag flushing pool through the water inlet pipe, and the slag flushing pool is communicated with the slag bin through the slag flushing pipe.

[0009] Preferably, a central cylinder is arranged in the center of the slag flushing pool, the slag outlet of the chute is located directly above the central cylinder, a backflow gap is left between the central cylinder and the slag flushing pool, and the water level line in the slag flushing pool is located in the middle of the central cylinder.

[0010] Preferably, a mounting bracket is further arranged, one end of the mounting bracket is fixedly connected with the inner side wall of the slag flushing pool, the other end of the mounting bracket is fixedly connected with the outer wall of the central cylinder, and the central cylinder is arranged in the middle and upper part of the slag flushing pool through the mounting bracket.

[0011] Preferably, one side wall of the slag bin is an inclined slope, the slag outlet pipe is located above the slope, the top of the slag bin is provided with an exhaust pipe, the side of the slag bin is provided with a slag discharge port, the slag discharge port is higher than the bottom surface of the slag bin, and the backflow pipe is communicated with the bottom of the slag bin.

[0012] Preferably, the slag flushing device is divided into a drop arrangement type slag flushing device and a horizontal arrangement type slag flushing device, the installation position of the slag flushing pool of the drop arrangement type slag flushing device is higher than the backflow pipe of the slag bin, the backflow pipe on the slag bin is communicated with the circulating water pool, the installation position of the slag flushing pool of the horizontal arrangement type slag flushing device is flush with the backflow pipe of the slag bin, and the backflow pipe on the slag bin is communicated with the inside of the slag flushing pool.

[0013] Preferably, the slag flushing pool of the drop arrangement type slag flushing device is in a cylindrical shape, the bottom of the slag flushing pool is in a conical shape, the side wall of the slag flushing pool is provided with a water inlet and a slag flushing port, the water inlet and the slag flushing port are close to the conical surface of the slag flushing pool, the water inlet pipe is connected with the water inlet, the water outlet of the water inlet pipe is inclinedly arranged along the tangent direction of the conical surface of the slag flushing pool, one end of the slag outlet pipe is communicated with the slag flushing port, and the other end of the slag outlet pipe is downwardly and obliquely arranged to be communicated with the upper part of the slag bin.

[0014] Preferably, the aperture of the slag flushing port is larger than the aperture of the water inlet, and the upper part of the slag flushing port is provided with a baffle.

[0015] Preferably, the slag flushing device of the horizontal arrangement has a water inlet at the top of the slag flushing tank, which is connected to the return pipe. The bottom of the slag flushing tank is the slag flushing port, which is a flat constriction structure. The lower end of the constriction structure is connected to the inside of the slag flushing pipe. The constriction structure is sealed to the slag flushing pipe on all four sides. One end of the slag flushing pipe is directly connected to the water inlet pipe, and the other end is inclined upward and connected to the top of the silo.

[0016] Preferably, the lower end of the constriction structure is inclined, and the direction of inclination of the lower end is the same as the direction of water flow in the slag flushing pipe. Several baffles are inclined inside the constriction structure, and the baffles divide the outlet into multiple water outlet channels. The direction of inclination of the baffles is the same as the direction of inclination of the constriction structure.

[0017] Preferably, a circulation pipeline is also included, with its inlet connected to the bottom of the slag bin and its outlet connected to the circulating water pool. The inlet of the circulation pipeline is higher than the bottom surface of the slag bin and lower than the slag discharge port.

[0018] Compared with the prior art, the advantages of the present invention are as follows:

[0019] (1) This invention overturns the original treatment method of yellow phosphorus waste residue and designs a new yellow phosphorus water slag flushing system. The system is designed with a flushing device with a flushing pool, forming a circulating cooling water system in the flushing pool to replace the existing waste residue cooling pool. The high-temperature slag coming down from the chute in the flushing device will quickly explode into small particles after encountering the cooling water, and will be flushed away in time through the flushing pool. The waste residue will not accumulate in the flushing device, which can avoid the waste residue melting together and causing an explosion. Since circulating water is used for cooling and flushing, a large amount of cooling water is no longer needed during the cooling operation, and the structure of the flushing pool is not large, thus greatly reducing the footprint. Moreover, since the cooling water in the flushing pool is circulating water, it can also maintain the ambient temperature of the cooling water in the flushing pool, ensuring a large temperature difference between it and the high-temperature slag, ensuring that the high-temperature waste residue can explode into small particles.

[0020] (2) The slag flushing device is a semi-enclosed structure above the cooling pool, which can seal all the high-temperature steam generated during cooling inside the device. The heat in the steam is recovered through condensation heat exchange gas so as to make secondary use of thermal energy. This solves the problem of high-temperature steam waste during the cooling of yellow phosphorus slag and can greatly improve economic value. Moreover, the condensate after condensation will flow back into the slag flushing pool along the inner wall of the slag flushing device as supplementary water for the cooling pool, realizing its recycling.

[0021] (3) A central cylinder is set in the center of the slag flushing pool. The design of the central cylinder limits the high-temperature slag coming down from the chute to only contact the circulating cooling water in the central cylinder. The slag is only cracked and cooled in the central cylinder. The high-temperature steam generated during cooling will only be discharged upward from the central cylinder and will not affect the return of the condensate from the return gap around the central cylinder. This solves the problem that the high-temperature steam causes the condensate to not return to the circulating cooling pool normally, and greatly improves the safety operation coefficient of the equipment.

[0022] (4) This invention not only greatly reduces the footprint of the system equipment, but also reduces the intensity of manual labor and improves the safe operation of the system. It solves the difficulties and pain points of the existing technology and is conducive to its widespread application.

[0023] (5) The present invention designs two types of slag flushing devices for different terrain conditions: drop-arranged slag flushing device and horizontal arrangement slag flushing device, and makes corresponding modifications to the slag flushing pool to meet the needs of the system production process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the system structure of the drop-arrangement slag flushing device of the present invention;

[0025] Figure 2 This is a partially enlarged schematic diagram of the drop-arrangement slag flushing device of the present invention;

[0026] Figure 3 This is a schematic diagram of the system structure of the horizontally arranged slag flushing device of the present invention.

[0027] Figure 4 This is a partial enlarged schematic diagram of the horizontally arranged slag flushing device of the present invention.

[0028] In the diagram: 1. Chute; 2. Slag flushing device; 21. Condensing heat exchanger; 22. Chimney; 3. Circulating water tank; 4. Inlet pipe; 5. Slag flushing tank; 51. Baffle; 52. Return gap; 53. Mounting bracket; 54. Closing structure; 55. Baffle; 6. Central cylinder; 7. Slag flushing pipe; 8. Slag bin; 81. Slope; 82. Exhaust pipe; 83. Slag discharge port; 9. Return pipe; 10. Circulation pipeline; 11. Water discharge pipe. Detailed Implementation

[0029] The invention will be further described below. A yellow phosphorus slag flushing system, see [link to relevant documentation]. Figure 1 and Figure 2The system includes a chute 1, a slag flushing device 2, a slag bin 8, a circulating water pool 3, a water inlet pipe 4, a slag flushing pipe 7, and a return pipe 9. The bottom of the slag flushing device 2 is provided with a slag flushing pool 5, and the top of the slag flushing device 2 is provided with a chimney 22. The slag flushing device 2 is provided with a condensing heat exchanger 21. The chute 1 is located at the lower part of the slag flushing device 2, and the slag outlet of the chute 1 is located directly above the slag flushing pool 5. The circulating water pool 3 is connected to the slag flushing pool 5 through the water inlet pipe 4, and the slag flushing pool 5 is connected to the slag bin 8 through the slag flushing pipe 7. The main feature of this invention is that it overturns the original method of treating yellow phosphorus slag and introduces a completely new slag flushing device 2 to replace the existing slag cooling pool. The slag flushing device 2, with a slag flushing pool 5, forms a circulating cooling water system. The high-temperature slag coming down from the chute rapidly breaks into small particles upon contact with the cooling water and is promptly flushed away by the slag flushing pool 5. This prevents the slag from accumulating in the slag flushing device 2, avoiding the possibility of the slag melting together and causing an explosion. Because circulating water is used for cooling and flushing, a large amount of cooling water is no longer needed during the cooling operation, and the structure of the slag flushing pool 5 is also much smaller, thus significantly reducing the floor space required. Furthermore, the circulating cooling water in the slag flushing pool 5 maintains a constant temperature, ensuring a large temperature difference between the cooling water and the high-temperature slag, guaranteeing that the high-temperature slag will break into small particles. The cooling pool of the slag flushing device 2 is topped with a semi-enclosed hood structure, which can completely seal the high-temperature steam generated during cooling within the device. Besides the window at the chute 1 for easy insertion, only the chimney 22 at the top allows for exhaust. A large amount of high-temperature steam exchanges heat with the condenser heat exchanger 21 within the slag flushing device 2. The heat in the steam is recovered through condensation and heat exchange, allowing for secondary utilization of thermal energy. The cooled gas is discharged from the chimney 22, solving the problem of wasted high-temperature steam during the cooling of yellow phosphorus slag and greatly improving economic value. Furthermore, the condensate flows back along the inner wall of the slag flushing device 2 into the slag flushing pool 5 as supplementary water for the cooling pool, achieving its recycling.

[0030] In addition to the advantages mentioned above, this invention features a unique design for the slag flushing tank 5. A central cylinder 6 is mounted in the center of the slag flushing tank 5, with the slag outlet of the chute 1 located directly above the central cylinder 6. A return flow gap 52 is maintained between the central cylinder 6 and the slag flushing tank 5. The water level in the slag flushing tank 5 is located in the middle of the central cylinder 6. The design of the central cylinder 6 ensures that the high-temperature slag from the chute 1 only comes into contact with the circulating cooling water within the central cylinder 6. The slag undergoes cracking and cooling only within the central cylinder 6, and the high-temperature steam generated during cooling only exits upwards from the central cylinder 6, without affecting the return flow of condensate through the return flow gap 52. Without the central cylinder 6, a large amount of steam rising upwards would prevent the condensate from flowing downwards normally. If this causes problems with the water supply in the cooling tank, and the slag continues to fall, the slag will not receive sufficient cooling, potentially leading to a safety accident. Therefore, the design of the central cylinder 6 is particularly important for the gas-liquid circulation of the entire device. The size of the cooling pool and the diameter of the central cylinder 6 are designed according to the production capacity of the yellow phosphorus production equipment. It should be noted that the high-temperature slag coming down from the chute 1 should not come into contact with the inner wall of the central cylinder 6 during the falling process, so as to avoid the slag adhering to the inner wall of the central cylinder 6 and causing the central cylinder 6 to burn and melt. After installation, the length of the chute 1 is adjusted to ensure that the slag outlet is located at the center of the central cylinder 6.

[0031] It also includes a mounting bracket 53, one end of which is fixedly connected to the inner wall of the slag flushing tank 5, and the other end is fixedly connected to the outer wall of the central cylinder 6. Since the lower part of the cooling tank is circulating cooling water, in order to avoid affecting the water circulation at the bottom of the cooling tank, the central cylinder 6 is supported in the upper middle part of the slag flushing tank by the mounting bracket 53. The mounting bracket 53 allows the central cylinder 6 to be suspended in the cooling tank, ensuring that a backflow gap 52 is left between the central cylinder 6 and the slag flushing tank 5. The slag flushing tank 5 is equipped with a water level display instrument to observe the water level line in the slag flushing tank 5 and adjust the water inflow.

[0032] In addition to the structural design of the slag flushing device 2, a corresponding cooling water circulation system was designed. Through the cooling water circulation system, the yellow phosphorus furnace, the slag flushing device 2, and the slag flushing pool 5 in the slag flushing device 2 are formed into a water circulation system that can circulate rapidly.

[0033] Because the actual construction locations of the yellow phosphorus furnaces vary in elevation, to ensure effective water circulation in the water circulation system, the slag flushing device 2 is divided into a drop-arrangement slag flushing device and a horizontal arrangement slag flushing device for the cooling water circulation system, catering to different elevation differences. Both methods have separate designs for the slag flushing tank 5 and the slag discharge method, as detailed below:

[0034] 1. Drop-type slag flushing device, see Figure 1

[0035] The slag flushing pool 5 of the drop-type slag flushing device is installed higher than the return pipe 9 of the slag bin 8. The return pipe 9 on the slag bin 8 is connected to the circulating water pool 3. The circulating water pool 3 pumps cooling water from the inlet pipe 4 into the slag flushing pool 5. Since the slag flushing device 2 is located at a higher position, the slag-water mixture coming out of the slag outlet pipe of the slag flushing pool 5 can flow into the slag bin 8. The slag-water mixture is separated in the slag bin 8. The cooling water in the slag bin 8 can flow into the circulating water pool 3 from the return pipe 9 for storage and reuse.

[0036] For this circulation method, the slag flushing tank 5 was designed independently, see [link to design]. Figure 2 The slag flushing pool 5 of the drop-arrangement slag flushing device is cylindrical, and the bottom of the slag flushing pool 5 is conical. The side wall of the slag flushing pool 5 is provided with a water inlet and a slag flushing outlet. The water inlet and the slag flushing outlet are close to the conical surface of the slag flushing pool 5. The water inlet pipe 4 is connected to the water inlet. The outlet direction of the water inlet pipe 4 is inclined along the tangent direction of the conical surface of the slag flushing pool 5. One end of the slag outlet pipe is connected to the slag flushing outlet, and the other end is inclined downward and connected to the upper part of the silo. During operation, cooling water is continuously added to the slag flushing tank 5 after being pressurized by a water pump. Since the bottom of the slag flushing tank 5 is conical, the outlet of the water inlet pipe 4 is inclined along the tangential direction, so that the water flow injected from the tangential direction flows along the conical surface at the bottom of the slag flushing tank 5 and rotates, causing the cooling water at the bottom of the slag flushing tank 5 to form a vortex. This rotates and carries up the waste slag particles at the bottom of the slag flushing tank 5 and discharges them from the slag flushing pipe 7, thus realizing the removal of waste slag particles.

[0037] In the structure of the slag flushing tank 5, since the inlet is where the injected cooling water is introduced, the flow rate is relatively fast, while the flow rate at the slag flushing outlet is slower. To ensure that the flow rates at the inlet and outlet are consistent and that the water level in the slag flushing tank 5 remains relatively stable, the diameter of the slag flushing outlet needs to be larger than the diameter of the inlet. The specific diameter can be calculated based on the site conditions. Because the waste slag particles at the bottom of the slag flushing tank 5 enter the slag flushing pipe 7 with the water flow, turbulence is easily generated, causing a small amount of waste slag particles to be flushed out in the opposite direction from the top of the slag flushing pipe 7. Therefore, to prevent the waste slag particles from flowing out in the opposite direction from the top of the slag flushing pipe 7, a baffle 51 is installed at the top of the slag flushing outlet to ensure that the overall swirling flow of waste slag particles is maintained at the bottom of the slag flushing tank 5.

[0038] 2. Horizontally arranged slag flushing device, see Figure 3

[0039] The horizontally arranged slag flushing device has its flushing tank 5 installed flush with the return pipe 9 of the slag bin 8. The flushing pipe 7 and the inlet pipe 4 are connected to share a single conveying pipe. After the waste slag particles explode and settle, they exit directly from the bottom of the flushing tank 5 and are directly conveyed to the slag bin 8 along with the water in the flushing pipe 7 and the inlet pipe 4. The return pipe 9 on the slag bin 8 is connected to the interior of the flushing tank 5. The cooling water filtered by the slag bin 8 flows back to the flushing tank 5 through the return pipe 9 as the circulating water for the flushing tank 5. To prevent a large amount of waste slag particles from flowing back into the flushing tank 5, a filter plate can be added to the return pipe 9 near the inlet of the slag bin 8 to prevent waste slag particles from flowing back into the flushing tank 5. Because the inlet pipe 4 and the flushing pipe 7 have large water flow rates, the flushing tank 5 does not require as much cooling water. Therefore, a circulation pipe 10 is also included. The inlet of the circulation pipe 10 is connected to the bottom of the slag bin 8, and its outlet is connected to the circulating water pool 3. Excess cooling water can be circulated to the circulating water pool 3 for reuse through the circulation pipe 10. The inlet of the circulation pipe 10 is higher than the bottom surface of the slag bin 8 to ensure that the bottom surface of the slag bin 8 can store a certain amount of cooling water to meet the water intake requirements of the flushing tank 5 through the return pipe 9, and is lower than the slag discharge port 83 to prevent cooling water from flowing out of the slag discharge port 83. The return pipe 9 of the horizontally arranged flushing device is equipped with a flow regulating valve to control the amount of water entering the flushing tank 5. In addition, a drain pipe 11 is connected to the inlet pipe 4. The drain pipe 11 is equipped with a switch valve. One end of the drain pipe 11 is connected to the inlet pipe 4, and the other end is connected to the inside of the circulating water tank 3. During operation, the drain pipe 11 is normally closed. When the machine stops, since the flushing pipe 7 is inclined upward, the remaining waste particles and cooling water inside need to be discharged. In order to avoid backflow to the flushing tank 5, the drain pipe 11 is designed. When the machine stops, the drain pipe 11 is opened to discharge the remaining cooling water and waste particles in the flushing tank 5 to the circulating water tank 3.

[0040] This invention addresses horizontally arranged slag flushing devices, and includes a separate design for the flushing water tank and cooling water circulation pipeline 10. (See attached image.) Figure 4 The horizontally arranged slag flushing device has a water inlet at the top of the slag flushing pool 5, which is connected to the return pipe 9. The water in the slag flushing pool 5 is replenished through the return pipe 9 as circulating cooling water. The bottom of the slag flushing pool 5 is the slag flushing outlet, which is a flat constriction structure 54. The constriction structure 54 is wider at the top and narrower at the bottom, which facilitates the collection of waste slag particles at the bottom of the slag flushing pool 5. The lower end of the constriction structure 54 is connected to the interior of the slag flushing pipe 7. The waste slag particles and cooling water are discharged together and discharged through the lower slag flushing pipe 7. The constriction structure 54 is sealed to the slag flushing pipe 7 on all sides and sealed with sealing material to prevent water leakage. One end of the slag flushing pipe 7 is directly connected to the water inlet pipe 4, and the other end is inclined upward and connected to the upper part of the silo. The slag flushing pipe 7 and the water inlet pipe 4 share the same pipe to transport the waste liquid mixture to the slag silo 8.

[0041] Since the slag discharge pipe contains pressurized cooling water, to prevent the cooling water from flowing back into the slag flushing tank 5 from the bottom of the flushing port, a constriction structure 54 is designed. The lower end of the constriction structure 54 is inclined, and the direction of inclination of the lower end is the same as the direction of water flow in the flushing pipe 7. This inclination in the same direction allows the cooling water to form a suction force on the constriction structure 54 during its flow towards the slag bin 8, drawing the water in the constriction structure 54 out in the direction of water flow, thus ensuring that the water in the constriction structure 54 does not flow back. Several baffles 55 are inclined inside the constriction structure 54, which divide the outlet into multiple water outlet channels. The inclination direction of the baffles 55 is the same as the inclination direction of the constriction structure 54. Increasing the inclination of the baffles 55 to divide the slag discharge port into multiple water outlet units can increase the suction force at the outlet structure, further ensuring that the cooling water does not flow back.

[0042] Since the circulating cooling water from the slag flushing device 2 contains small-particle waste slag, the slag bin 8 has been redesigned to take into account the characteristics of this material. One side wall of the slag bin 8 is an inclined slope 81, and the slag discharge pipe is located above the slope 81. The waste slag and circulating cooling water coming out of the slag discharge pipe fall onto the inner wall slope 81 of the slag bin 8. The slag liquid flows down the slope 81, which not only prevents the slag water from splashing, but also provides a wider heat dissipation area, which is convenient for the circulating cooling water to cool down. The waste slag and circulating cooling water are separated after passing through the slope 81. The waste slag accumulates at the bottom of the slag bin 8. When a certain amount has accumulated, it is unloaded from the slag discharge port 83 on the side of the slag bin 8 onto the slag car. The separated cooling water permeates to the bottom of the slag bin 8 and is recovered through the return pipe 9 to enter the next cycle. The return pipe 9 is connected to the bottom of the slag bin 8. The slag discharge port 83 is higher than the bottom surface of the slag bin 8 to prevent the cooling water at the bottom of the slag bin 8 from flowing out of the slag discharge port 83. The top of the slag bin 8 is equipped with an exhaust pipe 82. The slag-water mixture coming out of the slag flushing device 2 contains residual heat, and the generated gas can be discharged through the exhaust pipe 82.

[0043] The above provides a detailed description of the yellow phosphorus slag flushing system provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Modifications and improvements to the present invention are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A yellow phosphorus slag flushing system, characterized in that: The system includes a chute, a slag flushing device, a slag bin, a circulating water tank, an inlet pipe, a slag flushing pipe, and a return pipe. The slag flushing device has a slag flushing pool at its bottom and a chimney at its top. A condensing heat exchanger is installed inside the slag flushing device. The chute is located below the slag flushing device, and its slag outlet is directly above the slag flushing pool. The circulating water tank is connected to the slag flushing pool via the inlet pipe. The slag flushing pool is connected to the slag bin via the slag flushing pipe. The return pipe is connected to the bottom of the slag bin. A central cylinder is installed in the center of the slag flushing pool. The slag outlet of the chute is located at... Directly above the central cylinder, a return flow gap is left between the central cylinder and the slag flushing pool. The water level in the slag flushing pool is located in the middle of the central cylinder. The central cylinder is erected in the upper middle part of the slag flushing pool. The slag flushing device is divided into a drop-arrangement slag flushing device and a horizontal arrangement slag flushing device. The slag flushing pool of the drop-arrangement slag flushing device is installed higher than the return pipe of the slag bin. The return pipe on the slag bin is connected to the circulating water pool. The slag flushing pool of the horizontal arrangement slag flushing device is installed at the same level as the return pipe of the slag bin. The return pipe on the slag bin is connected to the inside of the slag flushing pool.

2. The yellow phosphorus slag flushing system according to claim 1, characterized in that: It also includes an installation bracket, one end of which is fixedly connected to the inner wall of the slag flushing tank, and the other end is fixedly connected to the outer wall of the central cylinder. The central cylinder is mounted on the upper middle part of the slag flushing tank by the installation bracket.

3. The yellow phosphorus slag flushing system according to claim 1, characterized in that: One side wall of the slag bin is an inclined slope, the slag discharge pipe is located above the slope, the top of the slag bin is equipped with an exhaust pipe, and the side of the slag bin is equipped with a slag discharge port, which is higher than the bottom of the slag bin.

4. The yellow phosphorus slag flushing system according to claim 1, characterized in that: The slag flushing pool of the drop-arrangement slag flushing device is cylindrical, and the bottom of the slag flushing pool is conical. The side wall of the slag flushing pool is provided with a water inlet and a slag flushing outlet. The water inlet and the slag flushing outlet are located near the conical surface of the slag flushing pool. The water inlet pipe is connected to the water inlet. The outlet direction of the water inlet pipe is inclined along the tangent direction of the conical surface of the slag flushing pool. One end of the slag outlet pipe is connected to the slag flushing outlet, and the other end is inclined downward and connected to the upper part of the silo.

5. A yellow phosphorus slag flushing system according to claim 4, characterized in that: The diameter of the slag flushing port is larger than the diameter of the water inlet, and a baffle is provided on the upper part of the slag flushing port.

6. The yellow phosphorus slag flushing system according to claim 1, characterized in that: The horizontally arranged slag flushing device has a water inlet at the top of the slag flushing tank, which is connected to the return pipe. The bottom of the slag flushing tank is the slag flushing port, which is a flat, tapering structure. The lower end of the tapering structure is connected to the inside of the slag flushing pipe, and the tapering structure is sealed to the slag flushing pipe on all four sides. One end of the slag flushing pipe is directly connected to the water inlet pipe, and the other end is inclined upward and connected to the top of the silo.

7. A yellow phosphorus slag flushing system according to claim 6, characterized in that: The lower end of the constriction structure is inclined, and the direction of inclination of the lower end is the same as the direction of water flow in the slag flushing pipe. Several baffles are inclined inside the constriction structure, and the baffles divide the outlet into multiple water outlet channels. The direction of inclination of the baffles is the same as the direction of inclination of the constriction structure.

8. A yellow phosphorus slag flushing system according to claim 7, characterized in that: It also includes a circulation pipeline, the inlet of which is connected to the bottom of the slag bin, and the outlet of which is connected to the circulating water pool. The inlet of the circulation pipeline is higher than the bottom surface of the slag bin and lower than the slag discharge port.

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