Nanofiltration device for removing fluorine and chlorine from waste electrolyte

Abstract

The utility model provides a nanofiltration device for removing fluorine and chlorine from waste electrolyte, which belongs to the technical field of waste electrolyte processing and comprises a filtering device, the filtering device comprises a barrel, a top cover and a bottom cover are respectively arranged at the upper end and the lower end of the barrel, a rotatable filter element structure is arranged in the barrel and comprises a tray, and a stand column is arranged at the circle center of the tray. The vertical column is provided with a core body, the upper side of the core body is provided with a cover plate, the upper end of the vertical column penetrates through the core body to be connected with the cover plate, and the cover plate is provided with an impeller. By means of rotation of the filter element, impurities are more difficult to adhere and accumulate, blockage caused by accumulation on the filter element is avoided, pores of the filter element can be kept unblocked, the continuous and stable filtering process is guaranteed, the service life of the filter element is prolonged, and the situation that the filter element needs to be frequently replaced due to blockage is reduced.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of waste electrolyte processing, specifically a waste electrolyte defluorination and chlorine nanofiltration device. Background Technology

[0002] Waste electrolyte refers to electrolytes that need to be discarded during industrial production or use due to failure, contamination, or unusability. Electrolytes are conductive liquids used in processes such as batteries, electroplating, and metal refining. They typically contain acids, alkalis, salts, or other chemical substances to promote ion migration. When these liquids deteriorate in performance, accumulate impurities, or fail in chemical reactions, they become waste electrolytes and must be properly disposed of to avoid environmental pollution. Waste electrolytes often contain harmful ions such as fluoride and chlorine. The presence of these ions is like a hidden danger. If they are discharged directly into the natural environment without proper treatment, they will cause profound and serious pollution to the environment and ecosystem. Fluoride ions not only increase water hardness and affect the living environment of aquatic organisms, but may also pose a direct threat to human health through drinking water sources, such as causing dental fluorosis and skeletal fluorosis. The harm of chlorine ions should not be underestimated either. They may exacerbate eutrophication, disrupt water quality balance, affect the diversity of aquatic ecosystems, and even pose a potential threat to human health through the food chain.

[0003] Waste electrolyte fluoride and chlorine removal nanofiltration devices are used to remove impurity ions such as fluoride, chlorine, and sodium from waste electrolytes. They primarily employ nanofiltration technology, an advanced membrane separation technology that utilizes the selective permeability of nanofiltration membranes to precisely trap harmful ions such as fluoride and chlorine in wastewater while allowing water molecules and other small molecules to pass through. This achieves highly efficient separation of inorganic salts from waste liquids. The filter element can be made of ion exchange resin, a polymer material with specific ion exchange groups. Strongly basic anion exchange resins have a good exchange and adsorption effect on chloride ions, removing chloride ions from waste electrolytes through ion exchange reactions. Currently, existing filter elements are fixedly installed in the device (using threaded connections, flange connections, or welding, etc.). Because the flow of electrolyte continuously washes the surface of the filter element, impurities adhere to and accumulate on its surface. Furthermore, the angle of each filtration surface of the filter element is fixed, making it prone to clogging and requiring frequent cleaning and maintenance, resulting in a relatively short lifespan for the filter element. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model provides a waste electrolyte defluorination and chlorine nanofiltration device to solve the technical problem mentioned in the background that current filter elements are fixedly installed in the device, and the angle of each filter surface is fixed, which easily leads to clogging.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A waste electrolyte defluorination and chlorine nanofiltration device includes a filtration device. The filtration device includes a cylindrical body with a top cover and a bottom cover at its upper and lower ends, respectively. A rotatable filter element structure is installed inside the cylindrical body. The filter element structure includes a tray with a column at its center. A core is installed on the column, and a cover plate is installed on the upper side of the core. The upper end of the column passes through the core and connects to the cover plate. An impeller is installed on the cover plate.

[0007] Furthermore, the tray and the lower end of the column are connected by threads.

[0008] Furthermore, a rectangular protrusion is provided at the center of the lower surface of the cover plate, the rectangular protrusion is engaged with a rectangular groove, and the rectangular groove is provided at the upper end of the column.

[0009] Furthermore, the core includes upper and lower side covers, and a plurality of polymer material filter sheets are disposed between the two side covers, and the polymer material filter sheets are distributed in a circumferential manner at equal intervals.

[0010] Furthermore, multiple positioning blocks are evenly spaced around the eccentric position on the lower surface of the cover plate, each positioning block is engaged with a positioning groove, and each positioning groove is located on the upper surface of the upper side cover.

[0011] Furthermore, the upper side of the cover plate is provided with a coupling interface, and the coupling interface and the impeller are connected by a shaft.

[0012] Furthermore, the cylinder wall is provided with an inlet and an outlet, the inlet is positioned higher than the outlet, and the impeller is located at one end of the inlet.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention, through its tray, column, core, cover plate, and impeller, achieves the retention of fluoride and chloride ions in waste electrolyte while allowing water molecules and other small molecules to flow through, thus achieving efficient separation of inorganic salts in the waste liquid. The rotation of the filter element makes it more difficult for impurities to adhere and accumulate, preventing blockages and maintaining unobstructed pores. This ensures a stable and continuous filtration process, extends the filter element's lifespan, reduces the need for frequent replacements due to blockages, and allows for a more even distribution of electrolyte on the filter element surface. This prevents localized excessive or insufficient filtration flow, ensuring the entire filter element surface can fully perform its filtration function. This effectively increases the contact area between the electrolyte and the filter element, thereby improving filtration efficiency.

[0015] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is an exploded view of the filter element structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the core of this utility model;

[0020] Figure 5 This is a schematic diagram of the column connection of this utility model;

[0021] Figure 6 This is a schematic diagram showing the positional relationship between the water inlet and the impeller of this utility model.

[0022] In the diagram: 1. Filter device; 11. Cylinder; 111. Inlet; 112. Outlet; 12. Bottom cover; 13. Top cover; 2. Filter element structure; 21. Tray; 22. Column; 221. Rectangular groove; 23. Filter element; 231. Side cover; 232. Polymer filter disc; 233. Positioning groove; 24. Cover plate; 241. Rectangular protrusion; 242. Positioning block; 243. Connecting port; 25. Impeller. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] Please refer to the appendix carefully. Figure 1-6 A waste electrolyte defluorination and chlorination nanofiltration device includes a filtration device 1. The filtration device 1 includes a cylindrical body 11. A top cover 13 and a bottom cover 12 are respectively provided at the upper and lower ends of the cylindrical body 11. A rotatable filter element structure 2 is provided inside the cylindrical body 11. The filter element structure 2 includes a tray 21. A column 22 is provided at the center of the tray 21. A core 23 is provided on the column 22. A cover plate 24 is provided on the upper side of the core 23. The upper end of the column 22 passes through the core 23 and is connected to the cover plate 24. An impeller 25 is provided on the cover plate 24. The lower side of the tray 21 is rotatably connected to the bottom cover 12 through a shaft.

[0027] The above structure enables the retention of fluoride and chloride ions in the waste electrolyte while allowing water molecules and other small molecules to flow through, achieving efficient separation of inorganic salts in the waste liquid. The rotation of the filter element makes it more difficult for impurities to adhere and accumulate, preventing blockages and maintaining unobstructed pores. This ensures a stable and continuous filtration process, extends the filter element's lifespan, reduces the need for frequent replacements due to clogging, and allows for a more even distribution of the electrolyte on the filter element surface. This prevents localized excessive or insufficient filtration flow, ensuring the entire filter element surface can fully perform its filtration function. This effectively increases the contact area between the electrolyte and the filter element, thereby improving filtration efficiency.

[0028] The specific operation is as follows: waste electrolyte is introduced into the cylinder 11 through the inlet 111. The electrolyte then passes through the impeller 25 on the filter element structure 2, which drives the impeller 25 to rotate. Subsequently, with the cooperation of the cover plate 24 and the column 22 below the impeller 25, the core 23 is driven to rotate, making it more difficult for impurities to adhere and accumulate. This prevents the accumulation of impurities on the polymer material filter 232 and avoids blockage. It helps to maintain the unobstructed pores of the polymer material filter 232 and ensures the continuous stability of the filtration process. After the electrolyte passes through the filter element structure 2, it can be discharged from the outlet 112.

[0029] Please refer to the appendix carefully. Figure 2 Appendix Figure 5 and attached Figure 6The upper side of the cover plate 24 is provided with a coupling interface 243. The coupling interface 243 and the impeller 25 are connected by a shaft and can be welded to ensure that the cover plate 24 and the impeller 25 rotate synchronously. The pipe wall of the cylinder 11 is provided with an inlet 111 and an outlet 112. The inlet 111 is higher than the outlet 112, and the impeller 25 is located at one end of the inlet 111, which is conducive to the waste electrolyte rotating the impeller 25.

[0030] Please refer to the appendix carefully. Figure 3 Appendix Figure 4 and attached Figure 5 The tray 21 and the lower end of the column 22 are connected by a thread, which facilitates the maintenance and replacement of the core 23. A rectangular protrusion 241 is provided at the center of the lower surface of the cover plate 24. The rectangular protrusion 241 engages with a rectangular groove 221, which is located at the upper end of the column 22. The connection between the lower side of the cover plate 24 and the column 22 is achieved through the cooperation between the rectangular protrusion 241 and the rectangular groove 221. The core 23 includes two side covers 231, and multiple polymer material filter sheets 232 are arranged between the two side covers 231. The polymer material filter sheets 232 are distributed in a ring at equal intervals. The polymer material filter sheets 232 can be made of materials such as activated alumina and ion exchange resin. Activated alumina has a large specific surface area and is anion exchange in acidic solutions. The filter material is highly selective for fluoride and is a relatively economical and effective filter material for fluoride removal. Ion exchange resin is a polymer material with specific ion exchange groups. Strongly basic anion exchange resin has a good exchange adsorption effect on chloride ions and can remove chloride ions from waste electrolyte through ion exchange reaction. For fluoride ions, some special ion exchange resins also have selective adsorption capacity. Multiple positioning blocks 242 are evenly spaced around the eccentric position on the lower surface of the cover plate 24. Each positioning block 242 is engaged with a positioning groove 233. Each positioning groove 233 is set on the upper surface of the upper side cover 231. Through the mutual cooperation between the positioning blocks 242 and the positioning grooves 233, the connection between the cover plate 24 and the core 23 is realized so that the core 23 rotates synchronously when the impeller 25 rotates.

[0031] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A waste electrolyte defluorination and chlorine nanofiltration device, comprising a filtration device (1), wherein the filtration device (1) comprises a cylindrical body (11), and a top cover (13) and a bottom cover (12) are respectively provided at the upper and lower ends of the cylindrical body (11), characterized in that, The cylinder (11) is provided with a rotatable filter element structure (2). The filter element structure (2) includes a tray (21). A column (22) is provided at the center of the tray (21). A core (23) is provided on the column (22). A cover plate (24) is provided on the upper side of the core (23). The upper end of the column (22) passes through the core (23) and is connected to the cover plate (24). An impeller (25) is provided on the cover plate (24).

2. The waste electrolyte defluorination and chlorine nanofiltration device according to claim 1, characterized in that, The lower ends of the tray (21) and the column (22) are connected by threads.

3. The waste electrolyte defluorination and chlorine nanofiltration device according to claim 1, characterized in that, A rectangular protrusion (241) is provided at the center of the lower surface of the cover plate (24), and the rectangular protrusion (241) is engaged with a rectangular groove (221), and the rectangular groove (221) is provided at the upper end of the column (22).

4. The waste electrolyte defluorination and chlorine nanofiltration device according to claim 1, characterized in that, The core (23) includes two side covers (231) on the top and bottom, and a plurality of polymer material filter sheets (232) are disposed between the two side covers (231), and the polymer material filter sheets (232) are distributed in a circumferential manner at equal intervals.

5. A waste electrolyte defluorination and chlorine nanofiltration device according to claim 3, characterized in that, Multiple positioning blocks (242) are arranged at equal intervals around the eccentric position on the lower surface of the cover plate (24). Each positioning block (242) is engaged with a positioning groove (233). Each positioning groove (233) is located on the upper surface of the upper side cover (231).

6. The waste electrolyte defluorination and chlorine nanofiltration device according to claim 5, characterized in that, The cover plate (24) is provided with a coupling interface (243) on its upper side, and the coupling interface (243) and the impeller (25) are connected by a shaft.

7. The waste electrolyte defluorination and chlorine nanofiltration device according to claim 1, characterized in that, The cylinder (11) has an inlet (111) and an outlet (112) on its pipe wall. The inlet (111) is positioned higher than the outlet (112), and the impeller (25) is located at one end of the inlet (111).

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