Concentrated water zero-discharge treatment system and method and application of concentrated water zero-discharge treatment system and method in industrial silicon production

Abstract

The invention discloses a concentrated water zero-discharge treatment system, a plurality of concentrated water inlet pipes are communicated with a filter box, a filter screen is arranged in the filter box, and when the concentrated water zero-discharge treatment system is used, concentrated water can enter the filter box through the concentrated water inlet pipes and is filtered through the filter screen. One end of the water collecting pipe is connected with a washing box through a water conveying pipe, magnet pieces are arranged on the periphery of the water conveying pipe, and when concentrated water passes through the water conveying pipe, unfiltered iron slag in the concentrated water can be magnetically attracted to the inner side wall of the water conveying pipe through the magnet pieces. A stirring assembly and a detergent inlet pipe are installed on a cover body at the top of the washing box, a detergent can be put into the washing box through the detergent inlet pipe, concentrated water and the detergent in the washing box can be evenly mixed by starting the stirring assembly so that substances prone to scaling in the concentrated water can be dissolved, and the treated concentrated water can be conveyed into the cooling pipe again by starting the circulating pump so that the concentrated water can be cooled. Cyclic utilization of the concentrated water is achieved, the concentrated water is effectively prevented from scaling in the pipeline in the using process, and the cooling effect and efficiency of the submerged arc furnace are improved. The concentrated water zero-discharge treatment method has the above effects.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial silicon production, and particularly relates to a zero-discharge treatment system and method for concentrated water and its application in industrial silicon production. Background Art

[0002] In the process of industrial silicon production, raw materials need to be added to a submerged arc furnace. After power is supplied, the raw materials are melted by the way of releasing electric sparks through the electrodes in the submerged arc furnace, and the raw materials are smelted. During this process, the raw materials undergo a reduction reaction in the submerged arc furnace to produce industrial silicon. In actual production, in order to control the temperature of the submerged arc furnace, improve production efficiency, and protect the equipment, it is necessary to use cooling water to cool down the submerged arc furnace.

[0003] However, in order to improve the utilization rate of cooling water and save water resources, the cooling water is usually recycled. During multiple recycling processes, impurities and dissolved substances in the water will gradually accumulate, making the water quality become more "concentrated". At this time, the cooling water is called concentrated water. During use, the concentrated water is prone to scale formation in the pipeline, affecting the cooling effect and efficiency. The current treatment method is to directly discharge the concentrated water, thereby reducing the utilization rate of the concentrated water and causing serious waste of water resources. Summary of the Invention

[0004] The purpose of this application is to provide a zero-discharge treatment system and method for concentrated water and its application in industrial silicon production, so as to solve the problems that the concentrated water is prone to scale formation in the pipeline during use, affecting the cooling effect and efficiency, and directly discharging the concentrated water, reducing the utilization rate of the concentrated water and causing serious waste of water resources.

[0005] To solve the above technical problems, this application provides a zero-discharge treatment system for concentrated water, including: A collecting pipe, the upper side of the collecting pipe is communicated with a filtering box, the filtering box is communicated with a plurality of concentrated water inlet pipes, the upper ends of each concentrated water inlet pipe are connected to the cooling pipe of the submerged arc furnace, a filter screen is arranged along the length direction inside the filtering box, one end of the filter screen is fixed with a sealing plate, the sealing plate and one end of the filtering box are fixedly connected by bolts, one end of the collecting pipe is detachably installed with a water delivery pipe, a magnet sheet is arranged on the outer periphery of the water delivery pipe, one end of the water delivery pipe is detachably installed with a washing box, a stirring component and a detergent inlet pipe are installed on the top cover of the washing box, the other side of the washing box is connected with a circulating pipe through a circulating pump, and the other end of the circulating pipe is connected to the cooling pipe of the submerged arc furnace.

[0006] As a preferred embodiment, in a zero-discharge treatment system for concentrated water, a sliding groove is arranged on the inner side wall of the filtering box; Correspondingly, sliding strips are fixed on both sides of the filter screen, and the sliding strips are located in the sliding groove.

[0007] As a preferred embodiment, in a concentrated water zero-discharge treatment system, a pull-out handle is further provided on the outer side of the sealing plate.

[0008] As a preferred embodiment, in a concentrated water zero-discharge treatment system, both ends of the water delivery pipe are detachably connected to the water collecting pipe and the washing box through flanges.

[0009] As a preferred embodiment, a concentrated water zero-discharge treatment system is provided, wherein the stirring assembly comprises a stirring motor fixed on the top cover, a stirring shaft extending into the washing box is fixed at one end of the output shaft of the stirring motor, and a plurality of stirring paddles are fixed on the stirring shaft.

[0010] In order to solve the above technical problems, the present application also provides a concentrated water zero discharge treatment method, based on any one of the above concentrated water zero discharge treatment systems, comprising: The concentrated water in the cooling pipe is received into the filter box through each concentrated water inlet pipe, and the impurities in the concentrated water are filtered through the filter screen and then flow into the water collecting pipe; When the concentrated water in the water collecting pipe is transported to the washing box through the water delivery pipe, the iron slag that has not been filtered out in the concentrated water can be magnetically attracted to the inner wall of the water delivery pipe by the magnet sheet; Adding detergent into the washing box through the detergent inlet pipe, and starting the stirring component to evenly mix the concentrated water and the detergent in the washing box, so as to dissolve the substances in the concentrated water that are easy to form scale; Starting the circulation pump to transport the treated concentrated water to the cooling pipe again through the circulation pipe to cool the submerged arc furnace; Among them, after the concentrated water is circulated for a set number of times, the sealing plate is opened to pull the filter screen out of the filter box, and the impurities on the filter screen are cleaned; the water pipe is disassembled, and the magnet sheet is removed to clean the iron slag in the water pipe.

[0011] In order to solve the above technical problems, the present application also provides an application of any one of the above-mentioned concentrated water zero-discharge treatment systems or the above-mentioned concentrated water zero-discharge treatment methods in industrial silicon production.

[0012] Compared with the prior art, a zero liquid discharge treatment system provided by the present invention includes a collecting pipe. A filtering box is connected to the upper side of the collecting pipe. A plurality of concentrated water inlet pipes are connected to the filtering box. The upper ends of the concentrated water inlet pipes are all connected to the cooling pipes of a submerged arc furnace. A filter screen is arranged in the filtering box along its length direction. One end of the filter screen is fixed with a sealing plate. The sealing plate and one end of the filtering box are fixedly connected by bolts. During use, concentrated water can enter the filtering box through the concentrated water inlet pipes. After the impurities in the concentrated water are filtered by the filter screen, the water flows into the collecting pipe. At the same time, after using for a period of time, the bolts can be loosened, and the sealing plate can be used to draw out through the filter screen from the filtering box to clean the impurities on it, improving the filtering effect and efficiency of the concentrated water. One end of the collecting pipe is detachably installed with a water delivery pipe. A magnet sheet is arranged on the outer circumference of the water delivery pipe. One end of the water delivery pipe is detachably installed with a washing box. During the process that the concentrated water in the collecting pipe flows to the washing box through the water delivery pipe, the unfiltered iron slag in the concentrated water can be magnetically attracted to the inner side wall of the water delivery pipe by the magnet sheet. And after using for a period of time, the water delivery pipe can be detached to remove the magnet sheet to clean the iron slag in the water delivery pipe, further improving the concentrated water treatment effect. A stirring assembly and a detergent inlet pipe are installed on the top cover of the washing box. The other side of the washing box is connected with a circulation pipe through a circulation pump. The other end of the circulation pipe is connected to the cooling pipe of the submerged arc furnace. When the concentrated water flows into the washing box, detergent can be put into the washing box through the detergent inlet pipe. Starting the stirring assembly can mix the concentrated water and the detergent in the washing box evenly to dissolve the scale-forming substances in the concentrated water. Finally, starting the circulation pump can convey the treated concentrated water to the cooling pipe again through the circulation pipe, realizing the recycling of the concentrated water and effectively preventing the concentrated water from easily scaling in the pipeline during use, improving the cooling effect and efficiency of the submerged arc furnace. In addition, a zero liquid discharge treatment method provided by the present application has the above effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0014] Figure 1 FIG. 1 is a schematic structural diagram of a zero liquid discharge treatment system provided by an embodiment of the present application; Figure 2 FIG. 2 is a schematic internal structure diagram of a filtering box provided by an embodiment of the present application; Figure 3 FIG. 3 is a schematic internal structure diagram of a washing box provided by an embodiment of the present application; Figure 4 FIG. 4 is a flow chart of a zero liquid discharge treatment method provided by an embodiment of the present application; In the figure: 1, collecting pipe; 2, filtration tank; 3, concentrated water inlet pipe; 4, filter screen; 5, sealing plate; 6, bolt; 7, water delivery pipe; 8, magnet sheet; 9, washing tank; 10, top cover; 11, detergent inlet pipe; 12, circulation pump; 13, circulation pipe; 14, chute; 15, sliding strip; 16, pull handle; 17, flange; 18, stirring motor; 19, stirring shaft; 20, stirring paddle. Specific implementation mode

[0015] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings.

[0016] The core of this application is to provide a zero-emission treatment system and method for concentrated water and its application in industrial silicon production, which solves the problems that concentrated water is prone to scale in pipelines during use, affecting the cooling effect and efficiency, and directly discharging concentrated water, reducing the utilization rate of concentrated water and causing serious waste of water resources.

[0017] Figure 1 It is a schematic structural diagram of a zero-emission treatment system for concentrated water provided by an embodiment of this application. Figure 2 It is a schematic internal structure diagram of a filtration tank provided by an embodiment of this application. Figure 3 It is a schematic internal structure diagram of a washing tank provided by an embodiment of this application. Refer to Figures 1 to 3 as shown.

[0018] Embodiment 1 A zero-emission treatment system for concentrated water includes a collecting pipe 1. The shape and size of the collecting pipe 1 can be determined according to actual situations. A filtration tank 2 is connected to the upper side of the collecting pipe 1, that is, the bottom of the filtration tank 2 is connected to the upper side of the collecting pipe 1. A plurality of concentrated water inlet pipes 3 are connected to the filtration tank 2. The upper ends of the concentrated water inlet pipes 3 are all connected to the cooling pipes of the submerged arc furnace. The concentrated water in the cooling pipes can flow into the filtration tank 2 through the concentrated water inlet pipes 3. A filter screen 4 is arranged along the length direction inside the filtration tank 2. The concentrated water entering the filtration tank 2 can be filtered through the filter screen 4 to remove impurities in the concentrated water. One end of the filter screen 4 is fixed with a sealing plate 5. The sealing plate 5 and one end of the filtration tank 2 are fixedly connected by bolts 6. After using for a period of time, the bolts 6 can be loosened to release the connection between the sealing plate 5 and the filtration tank 2, and the filter screen 4 can be pulled out of the filtration tank 2 by means of the sealing plate 5 to clean the impurities accumulated on the filter screen 4. During actual use, a sealing gasket can also be installed on the side of the sealing plate 5 to improve the connection tightness between the sealing plate 5 and the filtration tank 2 and prevent the water in the filtration tank 2 from flowing out.

[0019] One end of the water collecting pipe 1 is detachably installed with a water delivery pipe 7. A magnet sheet 8 is arranged on the outer periphery of the water delivery pipe 7. One end of the water delivery pipe 7 is detachably installed with a washing box 9, that is, the water delivery pipe 7 is detachably installed between the water collecting pipe 1 and the washing box 9. During the process of the concentrated water flowing from the water delivery pipe 7 to the washing box 9, the magnet sheet 8 can magnetically attract the iron slag not filtered out in the concentrated water to the inner side wall of the water delivery pipe 7, further improving the treatment effect on the concentrated water. Moreover, after using for a period of time, the water delivery pipe 7 can be detached from between the water collecting pipe 1 and the washing box 9, and after removing the magnet sheet 8, the iron slag in the water delivery pipe 7 can be cleaned. A stirring assembly and a detergent inlet pipe 11 are installed on the top cover body 10 of the washing box 9. The top cover body 10 is detachably installed on the washing box 9. By putting the detergent into the washing box 9 through the detergent inlet pipe 11, the substances easy to scale in the concentrated water can be dissolved. At the same time, starting the stirring assembly can mix the concentrated water and the detergent in the washing box 9 evenly, improving the dissolution speed. The detergent can be an acidic substance (for carbonate scale) and an alkaline substance (for sulfate scale and silicate scale). The reaction principle is the same as the existing technology and will not be elaborated in detail here. The other side of the washing box 9 is connected with a circulation pipe 13 through a circulation pump 12. The other end of the circulation pipe 13 is connected with the cooling pipe of the submerged arc furnace. Finally, starting the circulation pump 12 can transport the treated concentrated water to the cooling pipe again through the circulation pipe 13 to cool the submerged arc furnace, realizing the recycling of the concentrated water.

[0020] On the basis of the above-mentioned Embodiment 1, for a zero-emission treatment system for concentrated water, in order to realize the sliding installation of the filter screen 4 and the filter box 2, preferably, a sliding groove 14 is arranged on the inner side wall of the filter box 2; correspondingly, sliding strips 15 are fixed on both sides of the filter screen 4, and the sliding strips 15 are located in the sliding groove 14.

[0021] On the basis of the above-mentioned Embodiment 1, for a zero-emission treatment system for concentrated water, in order to facilitate the grasping of the sealing plate 5 and realize the pulling operation of the filter screen 4, preferably, a pulling handle 16 is further arranged on the outer side of the sealing plate 5. During use, the filter screen 4 can be pulled by means of the pulling handle 16.

[0022] On the basis of the above-mentioned Embodiment 1, for a zero-emission treatment system for concentrated water, in order to realize the detachable installation of the water delivery pipe 7, preferably, both ends of the water delivery pipe 7 are detachably connected with the water collecting pipe 1 and the washing box 9 through flanges 17.

[0023] On the basis of the above-mentioned Embodiment 1, for a zero-emission treatment system for concentrated water, in order to realize the stirring treatment of the materials in the washing box 9, preferably, the stirring assembly includes a stirring motor 18 fixed on the top cover body 10. One end of the output shaft of the stirring motor 18 is fixed with a stirring shaft 19 extending into the washing box 9, and a plurality of stirring paddles 20 are fixed on the stirring shaft 19.

[0024] A zero liquid discharge treatment system provided by the present invention includes a collecting pipe 1. A filtering box 2 is connected to the upper side of the collecting pipe 1. A plurality of concentrated water inlet pipes 3 are connected to the filtering box 2. The upper ends of the concentrated water inlet pipes 3 are all connected to the cooling pipes of a submerged arc furnace. A filter screen 4 is arranged along the length direction inside the filtering box 2. One end of the filter screen 4 is fixed with a sealing plate 5. The sealing plate 5 and one end of the filtering box 2 are fixedly connected by bolts 6. During use, the concentrated water can enter the filtering box 2 through the concentrated water inlet pipes 3. After the impurities in the concentrated water are filtered by the filter screen 4, it flows into the collecting pipe 1. At the same time, after using for a period of time, the bolts 6 can be loosened, and the sealing plate 5 can be drawn out from the filtering box 2 through the filter screen 4 to clean the impurities on it, improving the filtering effect and efficiency of the concentrated water. One end of the collecting pipe 1 is detachably installed with a water delivery pipe 7. A magnet sheet 8 is arranged on the outer periphery of the water delivery pipe 7. One end of the water delivery pipe 7 is detachably installed with a washing box 9. During the process that the concentrated water in the collecting pipe 1 flows to the washing box 9 through the water delivery pipe 7, the unfiltered iron slag in the concentrated water can be magnetically adsorbed on the inner side wall of the water delivery pipe 7 by the magnet sheet 8. And after using for a period of time, the water delivery pipe 7 can be detached to remove the magnet sheet 8 to clean the iron slag in the water delivery pipe 7, further improving the concentrated water treatment effect. A stirring assembly and a detergent inlet pipe 11 are installed on the top cover 10 of the washing box 9. The other side of the washing box 9 is connected with a circulation pipe 13 through a circulation pump 12. The other end of the circulation pipe 13 is connected to the cooling pipe of the submerged arc furnace. When the concentrated water flows into the washing box 9, detergent can be put into the washing box 9 through the detergent inlet pipe 11. Starting the stirring assembly can mix the concentrated water and the detergent in the washing box 9 evenly, so as to dissolve the scale-forming substances in the concentrated water. Finally, starting the circulation pump 12 can convey the treated concentrated water to the cooling pipe again through the circulation pipe 13, realizing the recycling of the concentrated water, and effectively preventing the concentrated water from easily scaling in the pipeline during use, improving the cooling effect and efficiency of the submerged arc furnace.

[0025] In the above text, the embodiments of a zero liquid discharge treatment system for concentrated water are described in detail. Based on the zero liquid discharge treatment system described in the above embodiments, the embodiments of the present invention also provide a zero liquid discharge treatment method corresponding to the system. Since the embodiments of the system part and the embodiments of the method part correspond to each other, the embodiments of the method part please refer to the embodiments of the system part for description and will not be elaborated here.

[0026] Embodiment 2 Figure 4 The flowchart of a zero liquid discharge treatment method provided by the embodiments of the present application, based on the zero liquid discharge treatment system of any one of the above, includes the following steps: S101: Receive the concentrated water in the cooling pipe into the filtering box through each concentrated water inlet pipe, filter the impurities in the concentrated water through the filter screen, and then flow it into the collecting pipe. The cooling pipe is arranged in a submerged arc furnace.

[0027] S102: When the concentrated water in the collecting pipe is transported to the washing tank through the water delivery pipe, iron slag that has not been filtered out in the concentrated water can be magnetically adsorbed on the inner side wall of the water delivery pipe by a magnet sheet.

[0028] S103: Pour detergent into the washing tank through the detergent inlet pipe, and start the stirring assembly to mix the concentrated water and the detergent in the washing tank evenly, so as to dissolve the scale-prone substances in the concentrated water.

[0029] S104: Start the circulation pump to transport the treated concentrated water to the cooling pipe again through the circulation pipe to cool the submerged arc furnace.

[0030] Among them, after the concentrated water is recycled for a set number of times, open the sealing plate to draw out the filter screen from the filter tank and clean the impurities on the filter screen; disassemble the water delivery pipe and remove the magnet sheet to clean the iron slag in the water delivery pipe.

[0031] By adopting this zero-emission treatment method for concentrated water, the scale-prone substances in the concentrated water can be dissolved, the recycling of concentrated water can be realized, water resources can be saved, and the cooling effect and efficiency of the submerged arc furnace can be improved.

[0032] To solve the above technical problems, the present application also provides an application of the zero-emission treatment system for concentrated water of any one of the above or the above zero-emission treatment method for concentrated water in the production of industrial silicon. That is, applying the zero-emission treatment system for concentrated water or the zero-emission treatment method for concentrated water in the cooling and temperature reduction of the submerged arc furnace in the production of industrial silicon.

[0033] Those skilled in the art will readily think of other embodiments of the present application after considering the specification and the practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope of the present application is pointed out by the claims.

[0034] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present application do not constitute a limitation on the protection scope of the present application.

Claims

1. A zero liquid discharge treatment system for concentrated water, characterized in that, include: A water collecting pipe (1), wherein the upper side of the water collecting pipe (1) is connected to a filter box (2), and the filter box (2) is connected to a plurality of concentrated water inlet pipes (3), and the upper end of each concentrated water inlet pipe (3) is connected to a cooling pipe of an ore-heating furnace. A filter screen (4) is arranged inside the filter box (2) along its length direction, and a sealing plate (5) is fixed to one end of the filter screen (4), and the sealing plate (5) is fixedly connected to one end of the filter box (2) by bolts (6). A water delivery pipe (7) is detachably mounted on one end of the water collecting pipe (1), and a magnet sheet (8) is arranged on the outer periphery of the water delivery pipe (7). A washing box (9) is detachably mounted on one end of the water delivery pipe (7), and a stirring assembly and a detergent inlet pipe (11) are mounted on the top cover (10) of the washing box (9). The other side of the washing box (9) is connected to a circulation pipe (13) via a circulation pump (12), and the other end of the circulation pipe (13) is connected to the cooling pipe of the ore-heating furnace.

2. The zero liquid discharge treatment system according to claim 1, wherein The inner wall of the filter box (2) is provided with a slide groove (14); Correspondingly, slide bars (15) are fixed on both sides of the filter screen (4), and the slide bars (15) are located in the slide grooves (14).

3. The zero liquid discharge treatment system according to claim 1, wherein, A pull-out handle (16) is also provided on the outer side of the sealing plate (5).

4. The zero liquid discharge treatment system according to claim 1, wherein Both ends of the water delivery pipe (7) are detachably connected to the water collecting pipe (1) and the washing box (9) via flanges (17).

5. The zero liquid discharge treatment system according to claim 1, wherein The stirring assembly comprises a stirring motor (18) fixed on the top cover (10), a stirring shaft (19) extending into the washing box (9) being fixed at one end of the output shaft of the stirring motor (18), and a plurality of stirring paddles (20) being fixed on the stirring shaft (19).

6. A method for zero liquid discharge treatment of concentrated water, based on the concentrated water zero liquid discharge treatment system according to any one of claims 1 to 5, characterized in that, include: The concentrated water in the cooling pipe is received into the filter box through each concentrated water inlet pipe, and the impurities in the concentrated water are filtered through the filter screen before flowing into the water collecting pipe; When the concentrated water in the water collecting pipe is transported to the washing box through the water delivery pipe, the iron slag that has not been filtered out in the concentrated water can be magnetically attracted to the inner wall of the water delivery pipe by the magnet sheet; Adding detergent into the washing box through the detergent inlet pipe, and starting the stirring component to evenly mix the concentrated water and the detergent in the washing box, so as to dissolve the substances in the concentrated water that are easy to form scale; Starting the circulation pump to transport the treated concentrated water to the cooling pipe again through the circulation pipe to cool the submerged arc furnace; Among them, after the concentrated water is circulated for a set number of times, the sealing plate is opened to pull the filter screen out of the filter box, and the impurities on the filter screen are cleaned; the water pipe is disassembled, and the magnet sheet is removed to clean the iron slag in the water pipe.

7. Use of the concentrated water zero-discharge treatment system according to any one of claims 1 to 5 or the concentrated water zero-discharge treatment method according to claim 6 in industrial silicon production.

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