A yellow phosphorus rinsing and refining tower

Abstract

The invention discloses a yellow phosphorus rinsing and refining tower, which is divided into a slow-down section, a coarse powder floating separation section, a medium powder floating separation section, a fine powder floating separation section, a micro powder floating separation section and a refined liquid phosphorus sedimentation section from top to bottom, and the top of the slow-down section is provided with an exhaust port, and the side of the slow-down section is provided with a cleaning water outlet. The upper part of the coarse powder floating separation section is provided with a liquid phosphorus crude product spray pipe, and the lower part of the micro powder floating separation section is provided with a clean water inlet pipe. Compared with the prior art, the present invention divides the yellow phosphorus rinsing and refining tower from top to bottom into six sections, performs multi-stage flushing and refining during the crude phosphorus sinking process, and continuously and dynamically refines during the refining period, with high purity and no need to stop, no need to cache through an intermediate water tank, and no need for transportation between equipment, and the refining of yellow phosphorus can be completed in one step, which greatly reduces the yellow phosphorus refining cycle. Moreover, the refining tower has a small footprint, requires less auxiliary equipment, has low equipment cost, and is economical.

Description

Technical Field

[0001] The invention relates to the field of yellow phosphorus preparation, in particular to a yellow phosphorus rinsing and refining tower. Background Art

[0002] At present, the production of yellow phosphorus adopts a spray tower to spray and condense the yellow phosphorus furnace gas for recovery. While spraying and condensing the yellow phosphorus vapor into liquid yellow phosphorus, the dust in the furnace gas will be washed and settled into the yellow phosphorus by the spray water, and deposited at the bottom of the washing tower to form a crude yellow phosphorus with heavy dust impurities. The crude phosphorus needs to be refined and purified to obtain high-purity yellow phosphorus. Among them, the refining of crude phosphorus is a very cumbersome and lengthy process. The refining equipment is a set of refining equipment with a complex structure and a large area. The crude phosphorus needs to be boiled into liquid yellow phosphorus through a refining pot, and the dust is rinsed and removed by rinsing. The yellow phosphorus is settled in stages, boiled and rinsed in stages, and the dust is drifted and overflowed in one stage, which is inefficient. Yellow phosphorus often has drift losses with dust. In this process, it is necessary to repeatedly refine to obtain refined yellow phosphorus with qualified purity, which results in a lengthy process flow, a large number of equipment, and high investment and maintenance costs. Summary of the invention

[0003] The object of the present invention is to provide a yellow phosphorus rinsing and refining tower which solves the above-mentioned problems.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a yellow phosphorus rinsing and refining tower, which is divided into a slow-down section, a coarse powder floating separation section, a medium powder floating separation section, a fine powder floating separation section, a micro powder floating separation section and a refined liquid phosphorus sedimentation section from top to bottom, an exhaust port is provided at the top of the slow-down section, a cleaning water outlet is provided at the side of the slow-down section, a liquid phosphorus crude product spray pipe is provided at the upper part of the coarse powder floating separation section, a clean water inlet pipe is provided at the lower part of the micro powder floating separation section, a refined phosphorus liquid outlet is provided at the bottom of the refined liquid phosphorus sedimentation section, a coarse-pore separation plate is provided between the coarse powder floating separation section and the medium powder floating separation section, a medium-pore separation plate is provided between the medium powder floating separation section and the fine powder floating separation section, and a fine-pore separation plate is provided between the fine powder floating separation section and the micro powder floating separation section.

[0005] Preferably, the injection port of the crude liquid phosphorus injection pipe is located on the central axis of the rinsing and refining tower, and the injection direction is downward, and the outlet of the clean water inlet pipe is located on the central axis of the rinsing and refining tower, and the outlet is upward.

[0006] Preferably, the coarse powder floating separation section, the medium powder floating separation section, the fine powder floating separation section, and the micro powder floating separation section are variable diameter structures, and the diameter of each separation section gradually increases from top to bottom.

[0007] Preferably, the coarse powder flotation separation section and the fine powder flotation separation section are straight tubes, the medium powder flotation separation section and the fine powder flotation separation section are gradually expanding tubes which are narrow at the top and wide at the bottom, the diameter of the upper end of the medium powder flotation separation section is the same as the diameter of the lower end of the coarse powder flotation separation section, the diameter of the lower end of the medium powder flotation separation section is the same as the diameter of the upper end of the fine powder flotation separation section, and the diameter of the lower end of the fine powder flotation separation section is the same as the diameter of the upper end of the fine powder flotation separation section.

[0008] Preferably, the slow-descent section and the refined liquid phosphorus sedimentation section are both conical kettle structures that are wide at the top and narrow at the bottom. The diameter of the lower end of the slow-descent section is the same as the diameter of the upper end of the coarse powder flotation separation section, and is fixedly connected to the coarse powder flotation separation section via a connecting flange. The diameter of the upper end of the refined liquid phosphorus sedimentation section is the same as the diameter of the lower end of the fine powder flotation separation section, and is fixedly connected to the fine powder flotation separation section via a connecting flange.

[0009] Preferably, the diameter of the clean water inlet pipe is smaller than the diameter of the cleaning water outlet.

[0010] Preferably, the outlet of the cleaning water outlet, the feed inlet of the crude liquid phosphorus product nozzle, and the inlet of the clean water inlet pipe are all provided with connecting flanges.

[0011] Preferably, connecting sections are provided between the coarse powder flotation separation section and the medium powder flotation separation section, between the medium powder flotation separation section and the fine powder flotation separation section, and between the fine powder flotation separation section and the micro powder flotation separation section. The coarse-pore separation plate, the medium-pore separation plate, and the fine-pore separation plate are respectively arranged in the corresponding connecting sections, and the connecting sections are connected between the separation sections through connecting flanges.

[0012] Preferably, the yellow phosphorus rinsing and refining tower is provided with a heating jacket on the outside, a heating steam inlet is provided at the upper end of the heating jacket, and a condensed water outlet is provided at the lower end of the heating jacket.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) The present invention divides the yellow phosphorus rinsing and refining tower into six sections from top to bottom. The crude phosphorus is refined step by step from top to bottom, and the cleaning water reversely rinses the crude phosphorus of each level from bottom to top. The crude phosphorus is sequentially rinsed and refined four times from top to bottom, namely, the coarse powder floating separation section, the medium powder floating separation section, the fine powder floating separation section, and the micro powder floating separation section. The finer the dust separated in each stage, the higher the purity of the yellow phosphorus.

[0015] (2) Through the structural design of the yellow phosphorus rinsing and refining tower, multi-stage rinsing and refining are carried out during the sinking process of crude phosphorus, and continuous dynamic refining is carried out during the refining period. The yellow phosphorus has high purity and does not require shutdown, buffering through an intermediate water pool, or transportation between equipment. The yellow phosphorus refining can be completed in one step, which greatly reduces the yellow phosphorus refining cycle. In addition, the refining tower occupies a small area, requires less auxiliary equipment, has low equipment cost, strong stability, and good economy.

[0016] (3) Each separation section is a variable diameter structure. When the water inlet volume of the clean water inlet pipe is constant, as the diameter of each separation section gradually increases from top to bottom, the flow rate of each separation section from bottom to top will gradually increase, thereby meeting the needs of dust washing and separation at each stage.

[0017] (3) The slow-down section adopts a conical kettle structure, which can reduce the flow rate of the washing water, so that the crude phosphorus carried into the slow-down section by the washing water can be effectively settled. The refined liquid phosphorus settling section adopts a conical kettle structure, which can make the refined yellow phosphorus converge to the refined phosphorus liquid outlet for recovery.

[0018] (4) The flange connection facilitates the disassembly and assembly of each separation section, and is also very convenient when the corresponding separation section needs to be replaced.

[0019] (5) The diameter of the clean water inlet pipe is smaller than the diameter of the cleaning water outlet, so that the water outlet speed at the top of the rinsing and refining tower can be smaller than the water inlet flow rate at the bottom, so as to achieve the purpose of slow water discharge in the slow-down section, and ensure that the crude phosphorus can be effectively deposited in the slow-down section and will not flow out with the cleaning water.

[0020] (6) A connecting section is provided between the coarse powder flotation separation section and the medium powder flotation separation section, between the medium powder flotation separation section and the fine powder flotation separation section, and between the fine powder flotation separation section and the micro powder flotation separation section. The connecting section can realize the transition connection between the separation sections. Since the connecting section is detachable, the coarse-pore separation plate, the medium-pore separation plate, and the fine-pore separation plate are installed in the connecting section, which is also convenient for the installation and disassembly of the separation plate and the subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is the schematic diagram of the yellow phosphorus rinsing system of the present invention.

[0023] In the figure, 1, crude phosphorus storage tank; 2, rinsing and refining tower; 20, connecting section; 21, slow descending section; 22, coarse powder floating separation section; 23, medium powder floating separation section; 24, fine powder floating separation section; 25, micro powder floating separation section; 26, refined liquid phosphorus sedimentation section; 27, coarse pore separation plate; 28, medium pore separation plate; 29, fine pore separation plate; 3, clean water storage tank; 4, crude phosphorus supply pipeline; 5, clean water supply pipeline; 6, cleaning water outlet pipeline; 7, cleaning water outlet; 8, liquid phosphorus crude product nozzle; 9, clean water inlet pipe; 10, refined phosphorus liquid outlet; 11, exhaust port; 12, clean water replenishment pipeline; 13, wash water filter; 14, crude phosphorus pump; 15, clean water pump; 16, steam heat exchanger; 17, steam heating pipeline; 18, hot steam inlet; 19, condensate outlet. DETAILED DESCRIPTION

[0024] The present invention will be further described below. A yellow phosphorus rinsing and refining tower, see Figure 1The rinsing and refining tower 2 is divided into a slow-down section 21, a coarse powder floating separation section 22, a medium powder floating separation section 23, a fine powder floating separation section 24, a micro powder floating separation section 25 and a refined liquid phosphorus sedimentation section 26 from top to bottom. The top of the slow-down section 21 is provided with an exhaust port 11, and the side of the slow-down section 21 is provided with a cleaning water outlet 7. The upper part of the coarse powder floating separation section 22 is provided with a liquid phosphorus crude product nozzle 8, and the lower part of the micro powder floating separation section 25 is provided with a clean water inlet pipe 9. The bottom of the refined liquid phosphorus sedimentation section 26 is provided with a refined phosphorus liquid outlet 10. A coarse-pore separation plate 27 is provided between the coarse powder floating separation section 22 and the medium powder floating separation section 23, a medium-pore separation plate 28 is provided between the medium powder floating separation section 23 and the fine powder floating separation section 24, and a fine-pore separation plate 29 is provided between the fine powder floating separation section 24 and the micro powder floating separation section 25. The present invention divides the yellow phosphorus rinsing and refining tower 2 into six sections from top to bottom, and the crude phosphorus is refined step by step from top to bottom, and the cleaning water is used to reversely flush the crude phosphorus of each level from bottom to top. First, the crude phosphorus liquid is sprayed into the coarse powder floating separation section 22 in the tower. When the coarse powder floating separation section 22 encounters the reverse washing of the cleaning water, the dust-level crude phosphorus is subjected to a primary washing and separation. The washing and separation process is heavy, the crude phosphorus falls, and the separated dust flows out from the washing blow-out outlet with the cleaning water. The crude phosphorus that meets the primary refining standard passes through the coarse hole separation plate 27 and enters the middle separation floating separation section for re-washing and refining. The crude phosphorus that does not meet the standard is Phosphorus is isolated in the coarse powder floating separation section 22 through the coarse hole separation plate 27 for further separation. A part of the crude phosphorus will be washed with water into the slow descending section 21, and then naturally settle and fall back, and the coarse powder floating separation section 22 will continue to separate. By analogy, the crude phosphorus will be washed and refined four times from top to bottom, namely, the coarse powder floating separation section 22, the medium powder floating separation section 23, the fine powder floating separation section 24, and the micro powder floating separation section 25. The finer the dust separated in each stage, the higher the purity of yellow phosphorus. The refined liquid phosphorus after refining enters the refined liquid phosphorus sedimentation section 26, and then passes through the refined phosphorus liquid outlet 10. Through the above structural design, multi-stage washing and refining are carried out during the sinking process of crude phosphorus, and continuous dynamic refining is carried out during the refining period. The purity is high and no shutdown is required, no buffering is required through the intermediate water tank, and no transportation between equipment is required. The refining of yellow phosphorus can be completed in one step, which greatly reduces the yellow phosphorus refining cycle. Moreover, the refining tower occupies a small area, requires less auxiliary equipment, has low equipment cost, strong stability and good economy.

[0025] The injection port of the crude liquid phosphorus injection pipe 8 is located on the central axis of the rinsing and refining tower 2, and the injection direction is downward. The outlet of the clean water inlet pipe 9 is located on the central axis of the rinsing and refining tower 2, and the outlet is upward. The outlet and the crude phosphorus feed direction can be straight up and down on the central axis, and the tower wall can be avoided from being scoured.

[0026] The coarse powder flotation separation section 22, the medium powder flotation separation section 23, the fine powder flotation separation section 24, and the micro powder flotation separation section 25 are variable diameter structures. When the water inlet amount of the clean water inlet pipe 9 is constant, as the diameter of each separation section gradually increases from top to bottom, the flow rate of each separation section from bottom to top will gradually increase, thereby meeting the needs of dust washing and separation at each stage.

[0027] The coarse powder floating separation section 22 and the fine powder floating separation section 25 are straight tubes, and the medium powder floating separation section 23 and the fine powder floating separation section 24 are gradually expanding tubes that are narrow at the top and wide at the bottom. The diameter of the upper end of the medium powder floating separation section 23 is the same as the diameter of the lower end of the coarse powder floating separation section 22, the diameter of the lower end of the medium powder floating separation section 23 is the same as the diameter of the upper end of the fine powder floating separation section 24, and the diameter of the lower end of the fine powder floating separation section 24 is the same as the diameter of the upper end of the fine powder floating separation section 25. The coarse powder floating separation section 22 and the fine powder floating separation section 25 adopt a straight tube design so that the flow rate of crude phosphorus in the separation section is relatively uniform. The gradually expanding tube design of the medium powder floating separation section 23 and the fine powder floating separation section 24 allows different flow rates of washing water to be formed between each separation section to meet the needs of dust separation. The diameter and height of each separation section are designed according to the on-site conditions.

[0028] The slow-down section 21 and the refined liquid phosphorus sedimentation section 26 are both conical kettle structures that are wide at the top and narrow at the bottom. The diameter of the lower end of the slow-down section 21 is the same as the diameter of the upper end of the coarse powder flotation separation section 22, and is fixedly connected to the coarse powder flotation separation section 22 through a connecting flange. The slow-down section 21 adopts a conical kettle structure, which can reduce the flow rate of the cleaning water, so that the crude phosphorus carried into the slow-down section 21 by the cleaning water can be effectively precipitated, and the crude phosphorus is precipitated back to the coarse powder flotation separation section 22 for washing and separation. The upper end diameter of the refined liquid phosphorus sedimentation section 26 is the same as the diameter of the lower end of the fine powder flotation separation section 25, and is fixedly connected to the fine powder flotation separation section 25 through a connecting flange. The refined liquid phosphorus sedimentation section 26 adopts a conical kettle structure, which can make the refined fine yellow phosphorus converge to the refined phosphorus liquid outlet 10 for recovery. The flange connection is convenient for the disassembly and assembly of each separation section, and it is also very convenient when the corresponding separation section needs to be replaced.

[0029] The diameter of the clean water inlet pipe 9 is smaller than the diameter of the washing water outlet 7, so that the water outlet speed at the top of the rinsing and refining tower 2 can be smaller than the flow rate of the water inlet at the bottom, so as to achieve the purpose of slow water outlet of the slow-down section 21, and ensure that the crude phosphorus can be effectively deposited in the slow-down section 21 and will not flow out with the washing water. Since the crude liquid phosphorus product nozzle 8 and the clean water inlet pipe 9 are located in the rinsing and refining tower 2 and are not convenient for disassembly, in order to facilitate the connection of the crude phosphorus supply pipeline 4 and the clean water supply pipeline 5, the outlet of the washing water outlet 7, the feed port of the crude liquid phosphorus product nozzle 8, and the water inlet of the clean water inlet pipe 9 are all provided with connecting flanges, and the connection of the pipelines is achieved through the connecting flanges.

[0030] If the yellow phosphorus rinsing and refining tower 2 is formed in one piece, the coarse-pore separation plate 27, the medium-pore separation plate 28, and the fine-pore separation plate 29 inside are inconvenient to install and maintain. Therefore, a connecting section 20 is provided between the coarse powder flotation separation section 22 and the medium powder flotation separation section 23, between the medium powder flotation separation section 23 and the fine powder flotation separation section 24, and between the fine powder flotation separation section 24 and the micro powder flotation separation section 25. The coarse-pore separation plate 27, the medium-pore separation plate 28, and the fine-pore separation plate 29 are respectively arranged in the corresponding connecting section 20, and the connecting section 20 is connected between the separation sections through a connecting flange. The connecting section 20 can realize the transition connection between the separation sections. Since the connecting section 20 is detachable, the coarse-pore separation plate 27, the medium-pore separation plate 28, and the fine-pore separation plate 29 are installed in the connecting section 20, which is also convenient for the installation and disassembly of the separation plate and the subsequent maintenance.

[0031] The yellow phosphorus rinsing and refining tower 2 is sheathed with a heating jacket, the upper end of the heating jacket is provided with a heating steam inlet 18, and the lower end of the heating jacket is provided with a condensed water outlet 19. The rinsing and refining tower 2 can be heated by the heating jacket to ensure that the crude phosphorus is in a liquid state during the refining process.

[0032] According to the yellow phosphorus rinsing and refining tower 2 of the present invention, a yellow phosphorus rinsing and refining system is designed, see Figure 2, comprising a crude phosphorus storage tank 1, a rinsing and refining tower 2, a clean water storage tank 3, a crude phosphorus supply pipeline 4, a clean water supply pipeline 5 and a cleaning water outlet pipe 6, wherein the top of the rinsing and refining tower 2 is provided with a cleaning water outlet 7, and the cleaning water outlet pipe 6 is connected to the cleaning water outlet 7, and the upper part of the rinsing and refining tower 2 is provided with a liquid phosphorus crude product nozzle 8, and the liquid phosphorus crude product nozzle 8 serves as a feed port for crude phosphorus, and the crude phosphorus storage tank 1 is connected to the liquid phosphorus crude product nozzle 8 through the crude phosphorus supply pipeline 4, and the rinsing and refining tower 2 is connected to the crude phosphorus crude product nozzle 8 through the crude phosphorus supply pipeline 4. A clean water inlet pipe 9 is provided at the bottom of the tower 2, and the clean water inlet pipe 9 serves as the inlet pipe for washing water. The clean water storage tank 3 is connected to the clean water inlet pipe 9 through a clean water supply pipeline 5. A refined phosphorus liquid outlet 10 is provided at the bottom of the rinsing and refining tower 2, and the refined phosphorus liquid outlet 10 is used to recover the refined yellow phosphorus after purification. An exhaust port 11 is provided at the top of the rinsing and refining tower 2, and the exhaust port 11 is used to recover the waste gas in the crude phosphorus. A clean water replenishment pipeline 12 is also provided on the clean water storage tank 3. The present invention completely abandons the existing process technology, and realizes multi-stage separation and rinsing of dust in crude phosphorus through the rinsing and refining tower 2. The crude phosphorus liquid flows down from the top of the tower, and the washing water moves from the bottom to the top. The crude phosphorus liquid and the washing water collide and wash each other, so that the dust is separated from the crude phosphorus. Since the dust is light in weight, it will be discharged from the top of the tower with the water flow after separation, and the yellow phosphorus with a specific gravity greater than water will fall into the bottom of the tower and deposit, waiting for recovery, thereby obtaining refined yellow phosphorus. The system equipment of this process only requires a crude phosphorus storage tank 1, a rinsing and refining tower 2, a clean water storage tank 3, a crude phosphorus supply pipeline 4, a clean water supply pipeline 5 and a cleaning water outlet pipe 6, covering an area of ​​about 100 square meters, which is 1 / (10-20) of the existing process system. In addition, the equipment investment is low, and the equipment cost is less than a quarter of the existing process system.

[0033] The yellow phosphorus rinsing and refining tower 2 can realize uninterrupted continuous feeding and refining of crude phosphorus. The dust in the crude phosphorus will be automatically graded and filtered according to the dust particle size during the descending process in the rinsing and refining tower 2 to achieve a multi-stage refining effect, and can continuously purify fine yellow phosphorus. The refining process is completed in one step, which reduces the transfer time of each link in the refining process and shortens the refining cycle of yellow phosphorus.

[0034] The nozzle of the liquid crude phosphorus spray pipe 8 is downward, so that the liquid yellow phosphorus crude phosphorus moves downward, and the outlet of the clean water inlet pipe 9 is upward, so that the washing water moves upward. The crude phosphorus supply pipeline 4 is provided with a crude phosphorus pump 14, and the crude phosphorus is pumped into the rinsing and refining tower 2 through the crude phosphorus pump 14. The clean water supply pipeline 5 is provided with a steam heat exchanger 16 and a clean water pump 15, and the clean water is pumped into the rinsing and refining tower 2 through the clean water pump 15. The clean water entering the rinsing and refining tower 2 is heated by the steam heat exchanger 16 to 60-80 degrees to prevent the low-temperature clean water from causing the yellow phosphorus to condense into a solid.

[0035] The rinsing and refining tower 2 and the crude phosphorus storage tank 1 are covered with a heating jacket, which ensures that the yellow phosphorus is in a liquid state during the process. The steam heat exchanger 16 and the heating jacket are both provided with a hot steam inlet 18 and a condensed water outlet 19. A steam heating pipeline 17 is also included, which is connected to the hot steam inlet 18 of the clean water heater, the rinsing and refining tower 2, and the crude phosphorus storage tank 1, respectively, and heat is supplied to the clean water heater, the rinsing and refining tower 2, and the crude phosphorus storage tank 1 through the steam heating pipeline 17.

[0036] In addition to the crude phosphorus supply pipeline 4 and the clean water supply pipeline 5 of the crude phosphorus, a large amount of washing water is generated after flushing, and is discharged from the yellow phosphorus rinsing refining tower 2 through the washing water outlet pipe 6. In order to realize the recycling of waste water, a washing water filter 13 is also included. The washing water outlet pipe 6 is connected with the clean water storage tank 3 through the washing water filter 13. The clean water filtered by the washing water filter 13 can be discharged into the clean water storage tank 3 for recycling, which solves the problem of large water demand in the yellow phosphorus refining process. When the water volume in the clean water storage tank 3 is insufficient, water can be replenished through the clean water replenishment pipeline 12.

[0037] The above is a detailed introduction to a yellow phosphorus rinsing and refining tower provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. Changes and improvements to the present invention will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A yellow phosphorus rinsing and refining tower, characterized in that: The rinsing and refining tower is divided into a slow-descent section, a coarse powder floating separation section, a medium powder floating separation section, a fine powder floating separation section, a micro powder floating separation section and a refined liquid phosphorus sedimentation section from top to bottom. An exhaust port is provided at the top of the slow-descent section, a cleaning water outlet is provided at the side of the slow-descent section, a liquid phosphorus crude product spray pipe is provided at the top of the coarse powder floating separation section, a clean water inlet pipe is provided at the bottom of the micro powder floating separation section, a refined phosphorus liquid outlet is provided at the bottom of the refined liquid phosphorus sedimentation section, a coarse-pore separation plate is provided between the coarse powder floating separation section and the medium powder floating separation section, a medium-pore separation plate is provided between the medium powder floating separation section and the fine powder floating separation section, and a fine-pore separation plate is provided between the fine powder floating separation section and the micro powder floating separation section.

2. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: The injection port of the crude liquid phosphorus injection pipe is located on the central axis of the rinsing and refining tower, and the injection direction is downward. The water outlet of the clean water inlet pipe is located on the central axis of the rinsing and refining tower, and the water outlet is upward.

3. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: The coarse powder floating separation section, the medium powder floating separation section, the fine powder floating separation section, and the micro powder floating separation section are variable diameter structures, and the diameter of each separation section gradually increases from top to bottom.

4. A yellow phosphorus rinsing and refining tower according to claim 3, characterized in that: The coarse powder flotation separation section and the fine powder flotation separation section are straight tubes, the medium powder flotation separation section and the fine powder flotation separation section are gradually expanding tubes which are narrow at the top and wide at the bottom, the diameter of the upper end of the medium powder flotation separation section is the same as the diameter of the lower end of the coarse powder flotation separation section, the diameter of the lower end of the medium powder flotation separation section is the same as the diameter of the upper end of the fine powder flotation separation section, and the diameter of the lower end of the fine powder flotation separation section is the same as the diameter of the upper end of the fine powder flotation separation section.

5. A yellow phosphorus rinsing and refining tower according to claim 4, characterized in that: The slow-descent section and the refined liquid phosphorus sedimentation section are both conical kettle structures that are wide at the top and narrow at the bottom. The diameter of the lower end of the slow-descent section is the same as the diameter of the upper end of the coarse powder flotation separation section, and is fixedly connected to the coarse powder flotation separation section via a connecting flange. The diameter of the upper end of the refined liquid phosphorus sedimentation section is the same as the diameter of the lower end of the fine powder flotation separation section, and is fixedly connected to the fine powder flotation separation section via a connecting flange.

6. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: The diameter of the clean water inlet pipe is smaller than the diameter of the cleaning water outlet.

7. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: The water outlet of the cleaning water outlet, the feed inlet of the liquid phosphorus crude product spray pipe, and the water inlet of the clean water inlet pipe are all provided with connecting flanges.

8. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: Connecting sections are provided between the coarse powder flotation separation section and the medium powder flotation separation section, between the medium powder flotation separation section and the fine powder flotation separation section, and between the fine powder flotation separation section and the micro powder flotation separation section. The coarse-pore separation plate, the medium-pore separation plate, and the fine-pore separation plate are respectively arranged in the corresponding connecting sections, and the connecting sections are connected between the separation sections through connecting flanges.

9. A yellow phosphorus rinsing and refining tower according to claim 1, characterized in that: The yellow phosphorus rinsing and refining tower is provided with a heating jacket on the outside, a heating steam inlet is provided at the upper end of the heating jacket, and a condensed water outlet is provided at the lower end of the heating jacket.

Images