Water quenching treatment system and process for yellow phosphorus slag

Abstract

The invention discloses a water quenching treatment system and process for yellow phosphorus slag, relates to the technical field of yellow phosphorus preparation, and solves the problems that part of yellow phosphorus slag enters a slag flushing water tank together with water flow during slag-water separation in the conventional device and process, so that the yellow phosphorus slag is accumulated in the slag flushing water tank, and the water quenching effect is poor. The space utilization rate of the slag flushing water tank is low; and the slag flushing water tank is inconvenient to clean. The device comprises a slag water quenching assembly, a slag-water separation assembly and a circulation assembly, wherein the slag water quenching assembly, the slag-water separation assembly and the circulation assembly are sequentially connected through pipelines; the circulating assembly comprises a slag flushing water tank, the slag flushing water tank is respectively connected with the slag-water separation assembly and the slag water quenching assembly through pipelines, and a flushing pipeline is arranged in the slag flushing water tank. The device has the advantages of circulating flushing, good flushing effect and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of yellow phosphorus preparation, and in particular relates to a yellow phosphorus slag water quenching treatment system and process. Background Art

[0002] Yellow phosphorus is an important basic industrial raw material, widely used in chemical industry, pesticide and other fields. Yellow phosphorus is also called white phosphorus. It is an allotrope of phosphorus. It is white or light yellow crystal, soft, brittle when cold, darker in light, and produces green phosphorescence and white smoke in the dark when exposed to air. It catches fire at about 40℃ in wet air and slightly higher in dry air. In the chemical industry, yellow phosphorus has a wide range of applications, including oil extraction, printing and dyeing, papermaking, leather making, alloy manufacturing and other fields. In these industries, yellow phosphorus can be used as a catalyst, reducing agent or raw material; in the agricultural field, yellow phosphorus is an important raw material for the production of pesticides, such as herbicides and insecticides. In addition, yellow phosphorus can react with acid to produce phosphoric acid, which is the main raw material for making phosphate fertilizers and plays an important role in improving the growth and yield of crops; in special fields, yellow phosphorus can be used to make smoke bombs, signal bombs, etc.; in short, the use of yellow phosphorus is very wide and important.

[0003] At present, electric furnace smelting method is commonly used to produce yellow phosphorus. In the process of producing yellow phosphorus by this method, yellow phosphorus slag will be generated. The yellow phosphorus slag is mainly composed of elements such as silicon, calcium, and iron, and has high potential utilization value. The existing yellow phosphorus slag is in a molten state after coming out of the electric furnace, and its temperature reaches 1300-1400°C. It needs to be fully contacted with cold water to form granulated slag and realize water quenching. After that, the yellow phosphorus slag flows into the quenching slag pool with the water flow, and then the water and the yellow phosphorus slag are pumped into the slag bin by a water pump, and the yellow phosphorus slag and water are filtered and separated. The slag is discharged through a valve, and the water is led to the slag flushing pool through a pipeline.

[0004] At present, when yellow phosphorus slag and water are separated in the slag bin, small particles of yellow phosphorus slag are prone to leak out of the filter and flow into the slag flushing pool together with the water. Over time, yellow phosphorus slag will accumulate at the bottom of the slag flushing pool, seriously affecting the use space of the slag flushing pool and making subsequent cleaning very troublesome. Summary of the invention

[0005] The invention discloses a yellow phosphorus slag water quenching treatment system and process, and aims to solve the technical problem that in the existing device and process, when slag and water are separated, part of the yellow phosphorus slag will enter the slag flushing pool together with the water flow, so that the yellow phosphorus slag is accumulated in the slag flushing pool, resulting in low space utilization of the slag flushing pool and inconvenience in cleaning.

[0006] In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A yellow phosphorus slag water quenching treatment system, comprising a slag water quenching component, a slag-water separation component and a circulation component.

[0008] The slag water quenching component, the slag-water separation component and the circulation component are connected in sequence through pipelines, and a slag discharge ditch is connected above the slag water quenching component;

[0009] The circulation component includes a slag flushing water pool, the slag-water separation component is arranged above the slag flushing water pool, the slag flushing water pool is connected to the slag-water separation component and the slag water quenching component through pipelines, and a flushing pipeline is provided in the slag flushing water pool.

[0010] After adopting this technical method, it should be noted that due to the limited filtering capacity of the slag-water separation component, during the water quenching process, when the high-temperature molten yellow phosphorus slag encounters low-temperature water, the molten yellow phosphorus slag is rapidly cooled and broken into small particles, and the water-quenched slag after water quenching is inconsistent in size. The small water-quenched slag cannot be well filtered and enters the slag flushing pool together with the water, accumulating to form precipitation, which is difficult to clean; therefore, the present application sets a flushing pipe in the slag flushing pool, and after the subsequent slag discharge is stopped, a clean water source can be injected from the flushing pipe to flush the slag flushing pool, thereby avoiding the accumulation of water-quenched slag in the slag flushing pool, reducing the difficulty of subsequent cleaning and maintaining a high use space for the slag flushing pool. The water-quenched slag and water after flushing will flow into the slag water quenching component again, thereby cooling the next molten yellow phosphorus slag to achieve recycling.

[0011] Furthermore, the slag-water separation component includes a slag bin, the upper end of the slag bin is connected to a first pipe, the lower end of the slag bin and the slag flushing pool are connected to a second pipe, and the second pipe is connected to the flushing pipe.

[0012] A filter screen is arranged inside the slag bin, and a slag outlet is also arranged at the lower end of the slag bin.

[0013] Furthermore, a cone bottom is provided at the bottom end of the slag bin, the slag outlet is provided at the cone bottom, a cavity is formed between the filter screen and the inner wall of the cone bottom, and one end of the second pipe is connected to the cavity.

[0014] After adopting this technical method, it should be noted that the slag-water mixture after water quenching in the slag water quenching component will enter the slag bin through the first pipe for filtration. A filter screen is arranged inside the slag bin, and a slag outlet is also arranged at the lower end of the slag bin. Filtration is achieved by relying on gravity potential energy. The filtered water flows into the slag flushing pool through the second pipe, and the filtered yellow phosphorus slag is discharged into the transport vehicle below through the slag outlet, and the filtered water will participate in the subsequent flushing of the slag flushing pool.

[0015] Preferably, the pore size of the filter is 3 mm.

[0016] After adopting this technical method, it should be noted that the mesh diameter of the screen is 3mm, which can filter most of the water-quenched slag and ensure normal and efficient filtration of water. It should be noted that in this application, it is inevitable that small-diameter water-quenched slag will pass through the screen and enter the quenching slag water pool, resulting in accumulation for a long time. Part of the water-quenched slag will also participate in the circulation through the circulation component. These water-quenched slags will enter the slag bin again for filtration. The large-diameter water-quenched slag after filtration by the screen will block the small-diameter water-quenched slag that enters the slag bin again, and will also play a filtering role. Therefore, under the joint action of the filtered water-quenched slag and the filter, the amount of small-diameter water-quenched slag passing through the filter and entering the slag flushing pool is greatly reduced, so that the filtration effect is better, and the subsequent backwashing effect will also be better.

[0017] Furthermore, the flushing pipe includes multiple sub-flushing pipes, and two adjacent sub-flushing pipes are respectively a first sub-flushing pipe and a second sub-flushing pipe. At least one side wall inside the slag flushing water pool is provided with a plurality of sub-flushing pipes. When sub-flushing pipes are provided on opposite sides of the flushing pipe, the sub-flushing pipes on one side correspond to the gap between the sub-flushing pipes on the other side.

[0018] Preferably, the water outlet of the first sub-flushing pipe is parallel to the bottom surface of the slag flushing water pool, and the water outlet of the second sub-flushing pipe forms an acute angle with the bottom surface of the slag flushing water pool.

[0019] After adopting this technical solution, it should be noted that the water outlet of the first sub-flushing pipe is parallel to the bottom surface of the slag flushing pool, which can achieve a larger flushing coverage area and uniform coverage, and can reduce the blind area of ​​flushing; and the water outlet of the second sub-flushing pipe is arranged at an acute angle to the bottom surface of the slag flushing pool, so that the water flow has a certain downward impact force when flowing out, and this impact force helps to more effectively flush the yellow phosphorus slag from the bottom and accelerate the discharge process of the yellow phosphorus slag. Therefore, by arranging the first sub-flushing pipe and the second sub-flushing pipe adjacent to each other, the yellow phosphorus slag accumulated in the slag flushing pool can be effectively and quickly flushed;

[0020] In addition, it should be noted that when sub-flushing pipes are set on opposite sides of the flushing pipe, the gap between the sub-flushing pipes on one side corresponds to the sub-flushing pipes on the other side, so that the first sub-flushing pipes and the second sub-flushing pipes on the opposite sides will not interfere with each other during the flushing process, thereby improving the cleaning effect and efficiency and helping to reduce the cleaning blind spots.

[0021] Furthermore, the sub-flushing pipes are provided on the four inner side walls of the slag flushing water pool, and an electric control valve group is provided at the lower end of the second pipe. The electric control valve group is used to individually control the opening or closing of the sub-flushing pipes on each inner side wall of the slag flushing water pool.

[0022] After adopting this technical solution, it should be noted that in order to achieve comprehensive cleaning of the bottom of the slag flushing water pool without dead corners, a first sub-flushing pipe and a second sub-flushing pipe are set on the four side walls inside the slag flushing water pool. By controlling the electric control valve group, the first sub-flushing pipe and the second sub-flushing pipe on one side wall or multiple side walls are flushed simultaneously or sequentially to improve the cleaning effect.

[0023] Furthermore, the flushing pipe also includes an annular pipe, which is arranged on the four side walls of the inner upper end of the slag flushing water pool. A "cross"-shaped connecting pipe is provided at the lower end of the second pipe. The second pipe and the connecting pipe are perpendicular to each other. The four ends of the connecting pipe are respectively connected to the four sides of the annular pipe. The connecting pipe is provided with the electric control valve group. The first sub-flushing pipe and the second sub-flushing pipe are both connected to the bottom of the annular pipe and are connected to the annular pipe.

[0024] After adopting this technical solution, it should be noted that in the actual process of cleaning the slag flushing water pool, the annular pipe is used to connect the sub-flushing pipes on the four walls inside the slag flushing water pool, and the water flowing into the connecting pipe from the second pipe is divided into the annular pipe through the electric control valve group, thereby realizing the water flushing of the sub-flushing pipes on the four side walls of the slag flushing water pool.

[0025] Furthermore, the electric control valve group includes a first electric control valve, a second electric control valve, a third electric control valve and a fourth electric control valve. The first electric control valve and the second electric control valve respectively control the first sub-flushing pipe and the second sub-flushing pipe of the left and right inner walls of the slag flushing water pool, and the third electric control valve and the fourth electric control valve respectively control the first sub-flushing pipe and the second sub-flushing pipe of the other two opposite inner walls of the slag flushing water pool.

[0026] After adopting this technical solution, it should be noted that in the actual process of cleaning the slag flushing pool, the first electric control valve and the second electric control valve can be closed first. At this time, the water will flow through the third electronic control valve and the fourth electronic control valve to the first sub-flushing pipe and the second sub-flushing pipe of the two inner walls of the inner wall of the slag flushing pool corresponding to the inner wall, and flush out from the water outlet to flush the slag. Since the first sub-flushing pipe and the second sub-flushing pipe on the two side walls are staggered, the flushing efficiency is higher, the effect is better, and the flushing blind area is reduced; after the flushing is completed, the third electronic control valve and the fourth electronic control valve are closed, and the first electronic control valve is opened, and the water flows out from the first sub-flushing pipe and the second sub-flushing pipe close to the second pipe side for cleaning; then the first electronic control valve is closed, and the fourth electronic control valve is opened, and the water flows to the second pipe for flushing, which is convenient for the discharge of yellow phosphorus slag; through this flushing method, the slag flushing pool is fully cleaned.

[0027] Furthermore, the slag water quenching assembly includes a slag discharge ditch, a flushing box and a slag quenching water pool. The slag flushing ditch is arranged between the flushing box and the slag quenching water pool. The slag discharge ditch is respectively connected with the flushing box and the electric furnace eye. The slag quenching water pool is connected with the slag-water separation assembly through a first pipeline, and a slag conveying circulation pump is provided on the first pipeline.

[0028] After adopting this technical method, it should be noted that the molten yellow phosphorus slag is discharged from the electric furnace eye into the slag discharge ditch, and then flows into the punching box through the slag discharge ditch. It will be water quenched in the punching box. The slag-water mixture after water quenching will enter the slag quenching water pool through the slag flushing ditch, and will be pumped into the slag bin through the first pipeline for filtration under the action of the slag conveying circulation pump. In the present application, the cross-section of the slag flushing ditch is U-shaped, and the curved shape of the U-shaped groove helps the yellow phosphorus slag to maintain a certain speed during the flow process, and helps to reduce the splashing of the yellow phosphorus slag during the flow process; in addition, it should be noted that the slag flushing ditch is located above the slag quenching water pool, and relies on gravitational potential energy to make the molten yellow phosphorus slag and water flow into the slag quenching water pool.

[0029] Furthermore, the flushing box and the slag flushing water pool are connected through a third pipeline, and a slag flushing circulation pump is connected to the third pipeline.

[0030] After adopting this technical solution, it should be noted that after the flushing pipeline has completed flushing the yellow phosphorus slag, the slag flushing circulation pump is started to pump the yellow phosphorus slag and water into the flushing box through the third pipeline. The flushing box is connected to the slag flushing ditch. Therefore, the water after slag flushing will quench the molten yellow phosphorus slag discharged from the slag discharge ditch to achieve circulation. In addition, it should be noted that the water temperature of the water circulating in the flushing box is 95°C.

[0031] Furthermore, the slag flushing water pool is also connected to a water supply pipe, the water supply pipe is communicated with the second pipeline, and the water outlet end of the flushing pipeline is located at the bottom of the slag flushing water pool.

[0032] After adopting this technical solution, it should be noted that a third valve is provided on the water supply pipe, which is used to control the injection of water into the flushing pipe, and enters the sub-flushing pipe together with the water filtered from the slag bin for flushing. Since the density of yellow phosphorus slag is greater than that of water, the slag sinks to the bottom of the slag flushing pool. Therefore, the water outlet of the flushing pipe is set at the bottom of the slag flushing pool to achieve a better slag flushing effect.

[0033] Furthermore, a fourth pipeline is connected between the flushing box and the lower end of the slag bin, and a slag bin backwashing pump is provided on the fourth pipeline.

[0034] After adopting this technical solution, it should be noted that after backwashing the slag flushing pool, the slag bin can be backwashed to improve the filtration efficiency and quality. When backwashing the slag bin, water is injected into the flushing pipe through the water supply pipe, the water flows to the slag flushing pool, and the slag bin backwashing pump is turned on to pump water into the slag bin to backwash the slag bin. The flushing water flows to the slag flushing pool through the second pipe.

[0035] Furthermore, the brewing box is connected to a fifth pipeline, and a furnace hot water pump is provided on the fifth pipeline.

[0036] After adopting this technical solution, it should be noted that the water in the slag flushing pool can also be transported to the electric furnace refining system through the fifth pipeline by the furnace hot water pump to achieve water recycling.

[0037] Furthermore, the slag drainage ditch is connected to a yellow phosphorus electric furnace, and a furnace eye opening and blocking machine is provided at the furnace eye of the electric furnace.

[0038] After adopting this technical method, it should be noted that in order to achieve intermittent slag discharge and ensure efficient subsequent filtration, water circulation and backwashing, a furnace eye opening and blocking machine is set up, and the electric furnace is opened or closed by controlling the furnace eye opening and blocking machine to achieve intermittent slag discharge. The technology for controlling the furnace eye opening and blocking machine is prior art and will not be repeated here. In addition, it should be noted that in the present application, the backwashing work is carried out in the interval between each slag discharge being stopped and the next slag discharge. During this interval, since the electric furnace stops slag discharge, no new yellow phosphorus water quenched slag flows into the slag flushing pool, thereby improving the quality and efficiency of the backwashing.

[0039] Furthermore, the first pipeline is provided with a first valve, a first one-way valve and a second valve, the third pipeline is provided with a fourth valve, a second one-way valve and a fifth valve, and the fourth pipeline and the fifth pipeline are provided with a one-way valve and a valve respectively.

[0040] After adopting this technical solution, it should be noted that the first valve and the second valve are respectively used to control the discharge of slag and water in the quenching water pool and the discharge of slag and water in the first pipeline into the slag bin. Since the quenching water pool is located below the slag bin, a first one-way valve is arranged on the first pipeline to prevent the backflow of water and slag in the first pipeline; the fourth valve and the fifth valve are respectively used to control the discharge of slag and water in the slag flushing water pool into the third pipeline and the discharge of water and slag in the third pipeline into the slag flushing box to participate in the circulation. Since the flushing box is located above the slag flushing water pool, a second one-way valve is arranged to prevent the backflow of water and slag in the third pipeline. The one-way valves arranged on the fourth pipeline and the fifth pipeline have the same function as the first one-way valve and the second one-way valve.

[0041] Furthermore, the slag quenching water pool, the slag bin and the slag flushing water pool are also connected with slag steam discharge pipes for discharging slag steam.

[0042] A slag flushing pool backwashing process comprises the following steps:

[0043] S1, slag removal, water quenching

[0044] The molten yellow phosphorus slag discharged from the furnace eye of the electric furnace will be discharged into the slag flushing ditch along the slag discharge ditch, and the water retained in the flushing box will be flushed into the slag flushing ditch at the same time to quench the molten yellow phosphorus slag. The yellow phosphorus quenching slag water mixture after quenching will flow into the quenching slag water pool through the slag flushing ditch;

[0045] S2. Filtering

[0046] Start the slag conveying circulation pump to pump the quenching slag water mixture in the quenching slag water pool into the slag bin through the first pipeline to separate the slag and water. The separated water-quenched slag is discharged through the slag outlet to the slag transport vehicle below and transported away. The separated water flows into the slag flushing water pool through the second pipeline.

[0047] S3, circulating water quenching

[0048] Start the slag flushing circulation pump to pump the water in the slag flushing pool into the flushing box through the third pipeline. The water in the flushing box will participate in the water quenching in step S1 to achieve circulation;

[0049] S4, backwashing of slag pool

[0050] After closing the furnace eye of the electric furnace and stopping slag discharge, open the third valve to inject water into the flushing pipe through the water supply pipe, and control the opening or closing of the first sub-flushing pipe and the second sub-flushing pipe by controlling the electric control valve group to flush the slag flushing pool. After the flushing is completed, the water in the slag flushing pool is pumped into the flushing box through the slag flushing circulation pump to achieve circulation.

[0051] S4.1, primary backwash

[0052] Control the first electric control valve and the second electric control valve to be in a closed state, control the third electronic control valve and the fourth electronic control valve to be in an open state, open the third valve, and water will flow through the third electronic control valve and the fourth electronic control valve to the first sub-flushing pipe and the second sub-flushing pipe of the two inner walls of the inner wall of the slag flushing pool corresponding to the inner wall, and flush out from the water outlet to flush the slag.

[0053] S4.2, Secondary backwash

[0054] The third electronic control valve and the fourth electronic control valve are controlled to be closed, and the first electronic control valve is controlled to be opened, so that water flows out from the first sub-flushing pipe and the second sub-flushing pipe close to the second pipe side and flushes the side away from the second pipe.

[0055] S4.3, three-stage backwash

[0056] The first electronic control valve is controlled to close, and the second electronic control valve is controlled to open. Water flows out from the first sub-flushing pipe and the second sub-flushing pipe away from the side of the second pipe and flushes toward the side close to the second pipe, so as to facilitate the discharge of yellow phosphorus slag.

[0057] S5, slag bin backwash

[0058] After closing the furnace eye of the electric furnace and stopping slag discharge, water is injected into the flushing pipe through the water supply pipe, and the water flows to the slag flushing pool. The slag bin backwashing pump is turned on to pump water into the slag bin through the fourth pipe to backwash the slag bin, and the flushing water flows to the slag flushing pool through the second pipe.

[0059] Preferably, in step S1, the molten yellow phosphorus slag is discharged once every 2-3 hours, and each discharge lasts for 40-80 minutes.

[0060] After adopting this technical solution, it should be noted that the furnace eye opening machine is turned on once every 2-3 hours for discharge, and the discharge time is 40-80 minutes. On the one hand, it is to fully heat the next batch of production. On the other hand, in the interval between stopping slag discharge and discharging slag again, since the electric furnace stops discharging slag during this interval, no new yellow phosphorus water-quenched slag flows into the slag flushing pool. Therefore, backwashing at this time will improve the quality and efficiency of backwashing. In addition, when in the interval period, the slag flushing circulation pump is continuously started to pump the water and water-quenched slag in the slag flushing pool into the flushing box. After that, the water-quenched slag will be left at the bottom. At this time, the water-quenched slag at the bottom of the slag flushing pool can be flushed through the flushing pipe, which will be easier to flush and further improve the flushing quality.

[0061] Preferably, the ratio of the amount of molten yellow phosphorus slag introduced into the slag flushing ditch in step S2 to the amount of water is 1:7-10.

[0062] After adopting this technical method, it should be noted that the ratio of the amount of molten yellow phosphorus slag introduced into the slag flushing ditch to the amount of water is 1:7-10, and the slag-water ratio is 1:7-10, which is convenient for fully water quenching the molten yellow phosphorus slag.

[0063] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0064] 1. A yellow phosphorus slag water quenching treatment system and process provided by the present invention, by arranging a flushing pipe in the slag flushing water pool, clean water can be injected from the flushing pipe after the subsequent slag discharge is stopped, and the slag flushing water pool is flushed together with the water filtered by the slag bin, thereby avoiding the accumulation of water-quenched slag in the slag flushing water pool, reducing the difficulty of subsequent cleaning and maintaining a high use space of the slag flushing water pool. The flushed water-quenched slag and water will flow into the slag water quenching component again, thereby cooling the next molten yellow phosphorus slag and realizing recycling;

[0065] 2. A yellow phosphorus slag water quenching treatment system and process provided by the present invention can achieve a larger flushing coverage area and uniform coverage by setting the water outlet of the first sub-flushing pipe parallel to the bottom surface of the slag flushing water pool, and can reduce the blind area of ​​flushing; the water outlet of the second sub-flushing pipe is set at an acute angle to the bottom surface of the slag flushing water pool, so that the water flow has a certain downward impact force when flowing out, and this impact force helps to more effectively flush the yellow phosphorus slag from the bottom and accelerate the discharge process of the yellow phosphorus slag. The combination of the two improves the cleaning efficiency;

[0066] 3. The present invention provides a yellow phosphorus slag water quenching treatment system and process, which realizes individual control of each side of the first sub-flushing pipe and the second sub-flushing pipe on the four sides of the inside of the slag flushing pool by arranging an electric control valve group on the connecting pipe, thereby achieving no dead angle and rapid slag flushing and cleaning.

[0067] 4. The present invention provides a yellow phosphorus slag water quenching treatment system and process, which respectively realizes circulating water quenching, slag bin backwashing and water recycling by arranging a third pipeline, a fourth pipeline and a fifth pipeline on the slag flushing water pool, thereby reducing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0069] Figure 1 It is the system principle diagram of the present invention;

[0070] Figure 2 This is a schematic diagram of the internal structure of the slag bin of the present invention;

[0071] Figure 3 This is a schematic diagram of the internal structure of the flushing pool of the present invention;

[0072] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at position Ⅰ in the middle.

[0073] Reference numerals

[0074] 1-slag discharge ditch, 2-slag flushing ditch, 3-quenching slag pool, 4-slag conveying circulation pump, 5-slag bin, 501-filter, 502-slag outlet, 6-slag flushing pool, 7-slag flushing circulation pump, 8-flushing box, 9-water supply pipe, 10-first valve, 11-second valve, 12-third valve, 13-fourth valve, 14-fifth valve, 15-first check valve, 16-second check valve, 17-first pipeline, 18-second pipeline, 19-third pipeline, 1901 -connecting pipe, 20-flushing pipe, 2001-first sub-flushing pipe, 2002-second sub-flushing pipe, 2003-annular pipe, 21-electric control valve group, 2101-first electric control valve, 2102-second electric control valve, 2103-third electric control valve, 2104-fourth electric control valve, 22-slag bin backwash pump, 23-furnace hot water pump, 24-sixth valve, 25-seventh valve, 26-fourth pipe, 27-fifth pipe. DETAILED DESCRIPTION

[0075] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application and the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and indicated in the accompanying drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0076] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships that are usually placed when the invention is used. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0077] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0078] Example 1

[0079] A yellow phosphorus slag water quenching treatment system, such as Figure 1-Figure 4 As shown, it includes a slag water quenching component, a slag-water separation component and a circulation component.

[0080] The slag water quenching component, the slag-water separation component and the circulation component are connected in sequence through pipelines, and a slag discharge ditch 1 is connected above the slag water quenching component;

[0081] The circulation component includes a slag flushing water pool 6, the slag-water separation component is arranged above the slag flushing water pool 6, the slag flushing water pool 6 is connected to the slag-water separation component and the slag water quenching component through pipelines, and a flushing pipeline 20 is provided in the slag flushing water pool 6.

[0082] The slag-water separation assembly includes a slag bin 5 , the upper end of which is connected to a first pipe 17 , the lower end of which is connected to the slag flushing pool 6 , and a second pipe 18 , which is connected to the flushing pipe 20 .

[0083] A filter screen 501 is disposed inside the slag bin 5 , and a slag outlet 502 is also disposed at the lower end of the slag bin 5 .

[0084] The bottom end of the slag bin 5 is provided with a cone bottom, the slag outlet 502 is provided at the cone bottom, a cavity is formed between the filter screen 501 and the inner wall of the cone bottom, and one end of the second pipe 18 is connected to the cavity.

[0085] The pore size of the filter is 3 mm.

[0086] The flushing pipe 20 includes a plurality of sub-flushing pipes 20, wherein two adjacent sub-flushing pipes 20 are respectively a first sub-flushing pipe 2001 and a second sub-flushing pipe 2002. At least one side wall inside the slag flushing pool 6 is provided with a plurality of sub-flushing pipes 20. When sub-flushing pipes 20 are provided on opposite sides of the flushing pipe 20, the sub-flushing pipes 20 on one side correspond to the gap between the sub-flushing pipes 20 on the other side.

[0087] The water outlet of the first sub-flushing pipe 2001 is parallel to the bottom surface of the slag flushing pool 6 , and the water outlet of the second sub-flushing pipe 2002 forms an acute angle with the bottom surface of the slag flushing pool 6 .

[0088] The slag water quenching assembly includes a slag discharge ditch 1, a flushing box 8 and a slag quenching water pool 3. The slag flushing ditch 2 is arranged between the flushing box 8 and the slag quenching water pool 3. The slag discharge ditch 1 is respectively connected with the flushing box 8 and the electric furnace eye. The slag quenching water pool 3 is connected with the slag-water separation assembly through a first pipeline 17. The first pipeline 17 is provided with a slag conveying circulation pump 4.

[0089] The flushing box 8 is connected to the slag flushing water pool 6 via a third pipeline 19 , and a slag flushing circulation pump 7 is connected to the third pipeline 19 .

[0090] The slag flushing water pool 6 is also connected to a water supply pipe 9 , which is in communication with the second pipeline 18 . The water outlet end of the flushing pipeline 20 is located at the bottom of the slag flushing water pool 6 .

[0091] The slag discharge ditch is connected to the yellow phosphorus electric furnace, and a furnace eye opening and blocking machine is arranged at the furnace eye of the electric furnace.

[0092] In this embodiment, the slag flushing pool and the flushing box are first connected through the third pipeline, and the flushing box is connected to the slag flushing ditch, so that the water and slag in the slag flushing pool can enter the slag flushing ditch through the third pipeline to participate in the water quenching of the molten yellow phosphorus slag, and the slag after water quenching flows into the slag quenching pool through the slag flushing ditch, and enters the slag bin through the first pipeline, and the filtered water and a small part of the yellow phosphorus slag that is not filtered in the slag bin enter the slag flushing pool through the second pipeline, and the water and slag in the slag flushing pool enter the third pipeline to realize circulation;

[0093] During the slag bin filtering process, a portion of the yellow phosphorus slag is not effectively filtered and enters the slag flushing pool. After a long time, this portion of the yellow phosphorus slag settles and accumulates and is difficult to remove. Therefore, a flushing pipe is set, and the water outlet of the first sub-flushing pipe and the water outlet of the second sub-flushing pipe are set at an angle, that is, the first sub-flushing pipe is parallel to the bottom surface of the slag flushing pool, a larger flushing coverage area can be achieved and the coverage is uniform, which can reduce the blind area of ​​flushing; the water outlet of the second sub-flushing pipe is set at an acute angle to the bottom surface of the slag flushing pool, so that the water flow has a certain downward impact force when flowing out, and this impact force helps to more effectively flush the yellow phosphorus slag from the bottom and accelerate the discharge process of the yellow phosphorus slag; when sub-flushing pipes 20 are set on opposite sides of the slag flushing pool, the gap between the sub-flushing pipe 20 on one side corresponds to the sub-flushing pipe 20 on the other side, so that the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 on the opposite sides will not interfere with each other during the flushing process, thereby improving the cleaning effect and efficiency and helping to reduce the cleaning blind area.

[0094] Example 2

[0095] The difference between this embodiment and embodiment 1 is that Figure 3 As shown, the sub-flushing pipes 20 are provided on the four inner side walls of the slag flushing water pool 6, and an electric control valve group 21 is provided at the lower end of the second pipe 18. The electric control valve group 21 is used to individually control the opening or closing of the sub-flushing pipes 20 on each inner side wall of the slag flushing water pool 6.

[0096] In this embodiment, the flushing pipe 20 also includes an annular pipe 2003, which is arranged on the four side walls of the upper inner end of the slag flushing water pool 6. A "cross"-shaped connecting pipe 1901 is provided at the lower end of the second pipe 18. The second pipe 18 and the connecting pipe 1901 are perpendicular to each other. The four ends of the connecting pipe 1901 are respectively connected to the four sides of the annular pipe 2003. The connecting pipe 1901 is provided with the electric control valve group 21. The first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 are both connected to the bottom of the annular pipe 2003 and are connected to the annular pipe 2003.

[0097] In this embodiment, the electric control valve group 21 includes a first electric control valve 2101, a second electric control valve 2102, a third electric control valve 2103 and a fourth electric control valve 2104. The first electric control valve 2101 and the second electric control valve 2102 respectively control the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 of the slag flushing water pool 6 close to the inner wall of the third pipe and relative to the inner wall of the third pipe. The third electric control valve 2103 and the fourth electric control valve 2104 respectively control the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 of the other two inner walls of the slag flushing water pool 6.

[0098] In this embodiment, during the actual cleaning of the slag flushing pool 6, the first electric control valve 2101 and the second electric control valve 2102 can be closed first. At this time, the water will flow through the third electronic control valve and the fourth electronic control valve to the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 of the two inner walls of the inner wall of the slag flushing pool 6, and flush out from the water outlet to flush the slag. Since the first sub-flushing pipe 2001 and the second sub-flushing pipe 20 on the two side walls are staggered, the flushing efficiency is higher, the effect is better, and the flushing blind area is reduced; after the flushing is completed, the third electronic control valve and the fourth electronic control valve are closed, and the first electronic control valve is opened, and the water flows out from the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 close to the second pipe 18 for cleaning; then the first electronic control valve is closed, and the fourth electronic control valve is opened, and the water flows to the second pipe 18 for flushing, which is convenient for the discharge of yellow phosphorus slag; through this flushing method, the slag flushing pool 6 is fully cleaned.

[0099] Example 3

[0100] The difference between this embodiment and the first embodiment is that a fourth pipeline 26 is connected between the punching box 8 and the lower end of the slag bin 5 , and a slag bin backwashing pump 22 is provided on the fourth pipeline 26 .

[0101] In this embodiment, after backwashing the slag flushing water pool 6, the slag bin 5 can be backwashed to improve the filtering efficiency and quality. When backwashing the slag bin 5, water is injected into the flushing pipe 20 through the water supply pipe 9, and the water flows to the slag flushing water pool 6. The slag bin backwashing pump 22 is turned on to pump water into the slag bin 5 to backwash the slag bin 5, and the flushing water flows to the slag flushing water pool 6 through the second pipe 18.

[0102] Example 4

[0103] The difference between this embodiment and the third embodiment is that a fifth pipeline 27 is further connected to the brewing box 8 , and a furnace hot water pump 23 is provided on the fifth pipeline 27 .

[0104] In this embodiment, the water in the slag flushing water pool 6 can also be transported to the electric furnace refining system through the furnace hot water pump 23 through the fifth pipeline 27 to achieve water recycling.

[0105] Example 5

[0106] The difference between this embodiment and embodiment 4 is that the first pipeline 17 is further provided with a first valve 10, a first non-return valve 15 and a second valve 11, the third pipeline 19 is provided with a fourth valve 13, a second non-return valve 16 and a fifth valve 14, the fourth pipeline 26 and the fifth pipeline 27 are respectively provided with a non-return valve, and the fourth pipeline 26 and the fifth pipeline 27 are respectively provided with a sixth valve 24 and a seventh valve 25.

[0107] In this embodiment, the one-way valve is used to prevent water from flowing back, and the valve is used to control the passage of water.

[0108] Example 6

[0109] The difference between this embodiment and embodiment 5 is that the slag quenching water pool 3, the slag bin 5 and the slag flushing water pool 6 are further connected with slag steam discharge pipes for discharging slag steam.

[0110] Example 7

[0111] A slag flushing pool backwashing process comprises the following steps:

[0112] S1, slag removal, water quenching

[0113] The molten yellow phosphorus slag discharged from the furnace eye of the electric furnace will be discharged into the slag flushing groove 2 along the slag discharge groove 1, and the water retained in the flushing box 8 will be flushed into the slag flushing groove 2 at the same time to quench the molten yellow phosphorus slag. The yellow phosphorus quenching slag water mixture after quenching will flow into the quenching slag water pool 3 through the slag flushing groove 2;

[0114] S2. Filtering

[0115] Start the slag conveying circulation pump 4 to pump the quenching slag water mixture in the quenching slag water pool 3 into the slag bin 5 through the first pipeline 17 to separate the slag and water. The separated water-quenched slag is discharged to the slag transport vehicle below through the slag outlet 502 and transported away. The separated water flows into the slag flushing water pool 6 through the second pipeline 18.

[0116] S3, circulating water quenching

[0117] Start the slag flushing circulation pump 7 to pump the water in the slag flushing water pool 6 into the flushing box 8 through the third pipe 19. The water in the flushing box 8 will participate in the water quenching in step S1 to achieve circulation;

[0118] S4, backwashing of slag pool

[0119] After closing the furnace eye of the electric furnace and stopping slag discharge, open the third valve 12 to inject water into the flushing pipe 20 through the water supply pipe 9, and control the opening or closing of the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 by controlling the electric control valve group 21, so as to flush the slag flushing water pool 6. After the flushing is completed, the water in the slag flushing water pool 6 is pumped into the flushing box 8 through the slag flushing circulation pump 7 to realize circulation.

[0120] Example 8

[0121] The method also includes flushing the slag bin with water in the slag flushing pool, and the flushed water flows into the slag flushing pool. The specific steps are as follows:

[0122] S5, slag bin backwash

[0123] After closing the furnace eye of the electric furnace and stopping slag discharge, water is injected into the flushing pipe 20 through the water supply pipe 9, and the water flows to the slag flushing pool 6. The slag bin backwashing pump 22 is turned on to pump water into the slag bin 5 through the fourth pipe 26 to backwash the slag bin 5. The flushing water flows to the slag flushing pool 6 through the second pipe 18.

[0124] Example 9

[0125] The backwashing method in step S4 also includes:

[0126] S4.1, primary backwash

[0127] Control the first electric control valve 2101 and the second electric control valve 2102 to be in a closed state, control the third electric control valve and the fourth electric control valve to be in an open state, open the third valve 12, and the water will flow through the third electronic control valve and the fourth electronic control valve to the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 of the two inner walls corresponding to the inner wall of the slag flushing pool 6, and flush out from the water outlet to flush the slag.

[0128] S4.2, Secondary backwash

[0129] The third electronic control valve and the fourth electronic control valve are controlled to be closed, and the first electronic control valve is controlled to be opened, so that water flows out from the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 close to the side of the second pipe 18 and flushes toward the side away from the second pipe 18.

[0130] S4.3, three-stage backwash

[0131] The first electronic control valve is controlled to close, and the second electronic control valve is controlled to open. Water flows out from the first sub-flushing pipe 2001 and the second sub-flushing pipe 2002 away from the side of the second pipe 18 and flushes toward the side close to the second pipe 18 to facilitate the discharge of yellow phosphorus slag.

[0132] Example 10

[0133] The difference between this embodiment and embodiment 7 is that in step S1, the molten yellow phosphorus slag is discharged every 2-3 hours, and each discharge lasts 40-80 minutes.

[0134] In this embodiment, the furnace eye opening and plugging machine is turned on once every 2-3 hours for discharge, and the discharge time is 40-80 minutes. On the one hand, it is to fully heat the next batch of production. On the other hand, in the interval between stopping slag discharge and discharging again, since the electric furnace stops discharging slag during this interval, no new yellow phosphorus water-quenched slag flows into the slag flushing pool. Therefore, backwashing at this time will improve the quality and efficiency of backwashing. In addition, when in the interval period, the slag flushing circulation pump is continuously started to pump the water and water-quenched slag in the slag flushing pool into the flushing box, and then the water-quenched slag will be left at the bottom. At this time, the water-quenched slag at the bottom of the slag flushing pool is flushed through the flushing pipe, which will be easier to flush and further improve the flushing quality.

[0135] Embodiment 11

[0136] The difference between this embodiment and embodiment 7 is that in step S2, the ratio of the amount of molten yellow phosphorus slag introduced into the slag flushing ditch to the amount of water is 1:7-10.

[0137] In this embodiment, the ratio of the amount of molten yellow phosphorus slag introduced into the slag flushing ditch to the amount of water is 1:7-10, and the slag-water ratio is 1:7-10, which is convenient for fully water quenching the molten yellow phosphorus slag.

[0138] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A yellow phosphorus slag water quenching treatment system, characterized in that: It includes slag water quenching components, slag water separation components and circulation components. The slag water quenching component, the slag-water separation component and the circulation component are connected in sequence through pipelines; The circulation component comprises a slag flushing water pool (6), wherein the slag flushing water pool (6) is connected to the slag-water separation component and the slag water quenching component through pipelines, respectively, and a flushing pipeline (20) is provided in the slag flushing water pool (6).

2. A yellow phosphorus slag water quenching treatment system according to claim 1, characterized in that: The slag-water separation component comprises a slag bin (5), the upper end of the slag bin (5) is connected to a first pipe (17), the lower end of the slag bin (5) is connected to a second pipe (18) between the slag flushing water pool (6), and the second pipe (18) is in communication with the flushing pipe (20).

3. A yellow phosphorus slag water quenching treatment system according to claim 1 or 2, characterized in that: The flushing pipe (20) comprises a plurality of sub-flushing pipes, wherein two adjacent sub-flushing pipes are respectively a first sub-flushing pipe (2001) and a second sub-flushing pipe (2002). At least one side wall of the slag flushing pool (6) is provided with a plurality of sub-flushing pipes. When sub-flushing pipes are provided on opposite sides of the flushing pipe (20), the gap between the sub-flushing pipes on one side corresponds to the gap between the sub-flushing pipes on the other side.

4. A yellow phosphorus slag water quenching treatment system according to claim 3, characterized in that: The water outlet of the first sub-flushing pipe (2001) is parallel to the bottom surface of the slag flushing water pool (6), and the water outlet of the second sub-flushing pipe (2002) forms an acute angle with the bottom surface of the slag flushing water pool (6).

5. A yellow phosphorus slag water quenching treatment system according to claim 3, characterized in that: The sub-flushing pipes are arranged on the four inner side walls of the slag flushing water pool (6), and an electric control valve group (21) is arranged at the lower end of the second pipe (18). The electric control valve group (21) is used to individually control the opening or closing of the sub-flushing pipes on each inner side wall of the slag flushing water pool (6).

6. A yellow phosphorus slag water quenching treatment system according to claim 1 or 2, characterized in that: The slag water quenching component comprises a slag discharge ditch (1), a punching box (8) and a slag quenching water pool (3); the slag flushing ditch (2) is arranged between the punching box (8) and the slag quenching water pool (3); the slag discharge ditch (1) is connected to the punching box (8) and the furnace eye of the electric furnace respectively; the slag quenching water pool (3) is connected to the slag-water separation component via a first pipeline (17); and a slag conveying circulation pump (4) is arranged on the first pipeline (17).

7. A yellow phosphorus slag water quenching treatment system according to claim 6, characterized in that: The flushing box (8) is connected to the slag flushing water pool (6) via a third pipeline (19), and a slag flushing circulation pump (7) is connected to the third pipeline (19).

8. A yellow phosphorus slag water quenching treatment system according to claim 1 or 2, characterized in that: The slag flushing water pool (6) is also connected to a water supply pipe (9), and the water supply pipe (9) is in communication with the second pipeline (18).

9. A yellow phosphorus slag water quenching treatment system according to claim 2, characterized in that: A fourth pipeline (26) is connected between the slag flushing pool (6) and the lower end of the slag bin (5), and a slag bin backwashing pump (22) is provided on the fourth pipeline (26).

10. A yellow phosphorus slag water quenching treatment process, implemented by using a yellow phosphorus slag water quenching treatment system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, slag removal, water quenching The molten yellow phosphorus slag discharged from the furnace eye of the electric furnace is discharged into the slag flushing ditch (2) along the slag discharge ditch (1), and the water retained in the flushing box (8) is flushed into the slag flushing ditch (2) at the same time to quench the molten yellow phosphorus slag with water. The yellow phosphorus quenching slag water mixture after quenching flows into the slag quenching water pool (3) through the slag flushing ditch (2); S2. Slag and water separation The slag conveying circulation pump (4) is started to pump the slag quenching water mixture in the slag quenching water pool (3) into the slag bin (5) through the first pipeline (17) for slag water separation; the separated water-quenched slag is discharged through the slag outlet (502) to the slag transport vehicle below and transported away; the separated water flows into the slag flushing water pool (6) through the second pipeline (18); S3, circulating water quenching The slag flushing circulation pump (7) is started to pump the water in the slag flushing water pool (6) into the flushing box (8) through the third pipeline (19), and the water in the flushing box (8) will participate in the water quenching in step S1 to achieve circulation; S4, backwashing of slag pool After the furnace eye of the electric furnace is closed and slag discharge is stopped, water is injected into the flushing pipe (20) through the second pipe (18) and the water supply pipe (9), and the opening or closing of the first sub-flushing pipe (2001) and the second sub-flushing pipe (2002) are controlled by controlling the electric control valve group (21), thereby flushing the slag flushing water pool (6). After the flushing is completed, the water in the slag flushing water pool (6) is pumped into the flushing box (8) through the slag flushing circulation pump (7) to achieve circulation. S5, slag bin backwash After the furnace eye of the electric furnace is closed and slag discharge is stopped, water is injected into the flushing pipe (20) through the water supply pipe (9), and the water flows to the slag flushing pool (6). The slag bin backwashing pump (22) is turned on to pump water into the slag bin (5) to backwash the slag bin (5), and the flushed water flows to the slag flushing pool (6) through the second pipe (18).

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