A device for removing impurities from brine for chlor-alkali chemical industry

Abstract

The utility model relates to chlor alkali chemical equipment technical field discloses a brine impurity removal device for chlor alkali chemical industry, including support base, the top fixed mounting of support base has the cylinder, through the utilization first filter membrane and the liquid guide plate setting is symmetrical conical and surrounds first pass dirt pipe arrangement, so that the solid sludge scraped by L -shaped scraper can smoothly converge into the center first pass dirt pipe, and the preliminary filtrate is collected and is guided to second filter membrane in the flow guide groove, secondly through motor drive spindle, synchronous belt drive mounting ring and screw shaft action, in this process, the L -shaped scraper of circular array arrangement carries out continuous scraping to the inner wall of two -stage conical first filter membrane and second filter membrane, and the deposit on its surface is promptly removed, secondly, the screw shaft rotation of two sections respectively located first filter membrane and second filter membrane cone top can realize the active delivery of the sludge of first filter membrane and second filter membrane, further promotes the reliability and processing efficiency of device operation.

Description

Technical Field

[0001] This utility model relates to the field of chlor-alkali chemical equipment technology, specifically a brine purification device for chlor-alkali chemical industry. Background Technology

[0002] Currently, in the chlor-alkali industry, chlorine, hydrogen, and sodium hydroxide or potassium hydroxide are produced by electrolyzing salt or potassium chloride aqueous solution using cation exchange membrane electrolyzers.

[0003] Existing brine impurity removal devices often experience problems during operation, as the filter media is easily encapsulated or clogged by sediment, leading to a continuous increase in filtration resistance and a sustained decrease in processing capacity. Furthermore, for concentrated sludge with high concentration and poor flowability, bridging or blockage can easily occur at the sludge discharge pipes or valves, making sludge discharge difficult and preventing impurities from being discharged in a timely manner. This can negatively impact the sedimentation and filtration effects at the upstream end. Therefore, we have developed a brine impurity removal device for chlor-alkali chemical industry. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a brine purification device for chlor-alkali chemical industry, which has the advantages of multi-stage filtration, guiding scraping to prevent clogging, and easy replacement and maintenance, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a brine purification device for chlor-alkali chemical industry, comprising a support base, a cylinder fixedly installed on the top of the support base, a cover plate provided on the top of the cylinder, a water inlet pipe provided on the side wall of the cylinder, a sewage discharge pipe provided on the side wall of the cylinder away from the water inlet pipe, a liquid collection plate fixedly installed on the bottom of the cylinder, a water outlet provided at the bottom of the liquid collection plate, a motor fixedly installed on the top of the cover plate, a coupling fixedly sleeved on the outer edge of the output shaft of the motor, a rotating shaft fixedly sleeved on the inner wall of the coupling, a first filter membrane, a liquid guide plate and a second filter membrane respectively provided in the inner cavity of the cylinder, an installation ring and a spiral shaft fixedly sleeved on the outer wall of the rotating shaft, a first sewage discharge pipe provided at the bottom of the first filter membrane, a second sewage discharge pipe provided at the bottom of the second filter membrane, an L-shaped scraper provided on the outer wall of the installation ring, a disassembly assembly provided in the inner cavity of the installation ring, and a guide groove provided on the top of the liquid guide plate.

[0006] As a preferred technical solution of this utility model: the first filter membrane and the liquid guide plate are both conical in shape and are symmetrically arranged with the first sludge pipe as the center. The upper end of the first sludge pipe is connected to the cone apex of the first filter membrane and the lower end is connected to the cone apex of the liquid guide plate. The second filter membrane is conical in shape, and the outer edge of the cone is fitted to the skirt of the liquid guide plate. One end of the second sludge pipe is connected to the cone apex of the second filter membrane, and the other end extends down to the feed end of the drain pipe and is connected to it. The liquid guide plate is horizontally fixedly installed in the inner cavity of the cylinder and is located between the first filter membrane and the second filter membrane. The guide groove is arranged around the edge of the liquid guide plate and acts to guide the liquid after passing through the first filter membrane.

[0007] As a preferred technical solution of this utility model: the number of spiral shafts is two, and they are respectively located at the cone-top outlet of the first filter membrane and the second filter membrane. The spiral outer edges of the two spiral shafts are adapted to the inner cavities of the first and second filtrate pipes.

[0008] As a preferred technical solution of this utility model: the number of L-shaped scrapers and disassembly / removal components is three, and each L-shaped scraper and disassembly / removal component is a group, arranged in a circular array with a spacing of 120 degrees. The three L-shaped scrapers, disassembly / removal components and the mounting ring are regarded as a group of movable components, and the number of such movable components is two, respectively arranged at the conical opening of the first filter membrane and the second filter membrane. The outer edges of the three L-shaped scrapers are respectively attached to and slidably arranged against the outer walls of the first filter membrane and the second filter membrane.

[0009] As a preferred technical solution of this utility model: the disassembly and assembly assembly includes a positioning groove opened in the inner wall of the mounting ring, a positioning pin is fixedly installed on the top of the L-shaped scraper, a first circular groove is opened in the inner wall of the positioning pin, a first slot, a sliding groove, a guide groove and a second circular groove are respectively opened in the inner wall of the mounting ring, a connecting member is provided in the inner wall of the L-shaped scraper, the connecting member includes a transverse spring and a transverse convex pin respectively disposed in the inner cavity of the positioning pin, a second slot is opened in the inner wall of the transverse convex pin, a longitudinal convex pin and a longitudinal spring are respectively disposed in the inner cavity of the sliding groove, a connecting rod is disposed in the inner cavity of the guide groove, and a button is disposed in the inner cavity of the second circular groove.

[0010] As a preferred embodiment of this utility model: the outer wall of the positioning pin is adapted to the shape of the inner wall of the positioning groove; one end of the transverse convex pin is spherical, and the outer wall of the spherical shape is adapted to the shape of the inner wall of the first slot; the outer wall of the other end of the transverse convex pin is slidably fitted against the inner wall of the first circular groove; the transverse spring is located on one side of the transverse convex pin, with one end overlapping the outer wall of the transverse convex pin and the other end overlapping the inner wall of the positioning groove; the outer wall of one end of the longitudinal convex pin is inclined, and the outer wall of the inclined surface is aligned with the outer wall of the spherical end of the transverse convex pin. The longitudinal convex pin is slidably fitted with the inner wall of the slide groove at one end. The longitudinal spring is located on one side of the longitudinal convex pin, with one end overlapping the outer wall of the longitudinal convex pin and the other end overlapping the inner wall of the slide groove. The outer wall of the inclined end of the longitudinal convex pin is adapted to the shape of the inner wall of the second slot. One end of the connecting rod is connected and fixed to the side wall of the longitudinal convex pin, and the other end is connected and fixed to the side wall of the button. The outer wall of the connecting rod is slidably fitted with the inner wall of the guide groove, and the outer wall of the button is slidably fitted with the inner wall of the second circular groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This brine impurity removal device for chlor-alkali chemical industry utilizes a first filter membrane and a guide plate arranged in a symmetrical conical shape around a first sludge passage pipe. This allows solid sludge scraped by L-shaped scrapers to smoothly flow into the central first sludge passage pipe, while the initial filtrate is collected by a guide channel and directed to the second filter membrane. A motor-driven rotating shaft synchronously drives the mounting ring and the spiral shaft. During this process, the L-shaped scrapers, arranged in a circular array, continuously scrape the inner walls of the two conical first and second filter membranes, promptly removing deposits adhering to their surfaces. Furthermore, the rotation of the two spiral shafts located at the apex of the first and second filter membrane cones enables active transport of sludge from both membranes, further improving the reliability and processing efficiency of the device.

[0012] 2. This brine impurity removal device for chlor-alkali chemical industry involves inserting a positioning pin into a positioning groove, causing a transverse convex pin to slide along the first circular groove. During this process, the spherical end of the transverse convex pin is squeezed by the inner wall of the positioning groove, compressing the transverse spring. This causes the transverse convex pin to automatically spring into lock when it reaches the first slot position, thus completing the initial positioning. Simultaneously, the spherical end of the transverse convex pin contacts the inclined surface of the longitudinal convex pin, pushing the longitudinal convex pin along the slide groove, compressing the longitudinal spring. Then, when the transverse convex pin is fully in place, the longitudinal convex pin automatically engages in the second slot to form an interlock, thereby avoiding the risk of loosening that may occur under vibration. During disassembly, pressing a button drives the connecting rod, causing the longitudinal convex pin to exit the second slot, thus releasing the interlock. This eliminates the need for special tools or complex operations, further improving the convenience of equipment maintenance and work efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 3 This is a schematic diagram of the guide filter structure of this utility model; Figure 4 This is a schematic diagram of the push-cleaning structure of this utility model; Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0014] In the diagram: 1. Support base; 2. Cylinder; 3. Cover plate; 4. Inlet pipe; 5. Drain pipe; 6. Motor; 7. Coupling; 8. Shaft; 9. First filter membrane; 10. Mounting ring; 11. First waste pipe; 12. Guide plate; 13. Second filter membrane; 14. Second waste pipe; 15. Flow channel; 16. L-shaped scraper; 17. Assembly / disassembly assembly; 18. Spiral shaft; 19. Collection plate; 20. Outlet. ; 171, Positioning groove; 172, Positioning pin; 173, First circular groove; 174, First slot; 175, Slide groove; 176, Guide groove; 177, Second circular groove; 178, Connector; 1781, Transverse spring; 1782, Transverse convex pin; 1783, Second slot; 1784, Longitudinal convex pin; 1785, Longitudinal spring; 1786, Linkage rod; 1787, Button. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 - Figure 5 A brine purification device for chlor-alkali chemical industry includes a support base 1, a cylinder 2 fixedly mounted on the top of the support base 1, a cover plate 3 on the top of the cylinder 2, a water inlet pipe 4 on the side wall of the cylinder 2, a drain pipe 5 on the side wall of the cylinder 2 away from the water inlet pipe 4, a liquid collecting plate 19 fixedly mounted on the bottom of the cylinder 2, a water outlet 20 at the bottom of the liquid collecting plate 19, a motor 6 fixedly mounted on the top of the cover plate 3, and a coupling 7 fixedly sleeved on the outer edge of the output shaft of the motor 6. The inner wall of the coupling 7 is fixedly sleeved with a rotating shaft 8. The inner cavity of the cylinder 2 is respectively provided with a first filter membrane 9, a liquid guide plate 12, and a second filter membrane 13. The outer wall of the rotating shaft 8 is fixedly sleeved with an installation ring 10 and a spiral shaft 18. The bottom of the first filter membrane 9 is provided with a first sludge pipe 11, the bottom of the second filter membrane 13 is provided with a second sludge pipe 14, the outer wall of the installation ring 10 is provided with an L-shaped scraper 16, the inner cavity of the installation ring 10 is provided with a disassembly and assembly assembly 17, and the top of the liquid guide plate 12 is provided with a guide groove 15. In the above structure, the first filter membrane 9, the liquid guide plate 12, and the second filter membrane 13 are sequentially arranged in the inner cavity of the cylinder 2, and the motor 6 drives the rotating shaft 8 to rotate through the coupling 7, thereby synchronously driving the L-shaped scraper 16 and the spiral shaft 18 on the mounting ring 10 to rotate. This allows the mixed solution of brine and precipitant entering the cylinder 2 to pass through the two-stage conical first filter membrane 9 and second filter membrane 13 for filtration, so that the filtrate is efficiently collected and discharged from the outlet 20. At the same time, the rotating L-shaped scraper 16 continuously scrapes off the deposits on the surface of the first filter membrane 9 and the second filter membrane 13 to prevent them from clogging, while the scraped-off impurities are pushed to the drain pipe 5 by the spiral shaft 18 for discharge, thereby improving the efficiency and stability of brine impurity removal.

[0017] In a preferred embodiment: the first filter membrane 9 and the liquid guide plate 12 are both conical in shape and are symmetrically arranged with the first sludge pipe 11 as the center. The upper end of the first sludge pipe 11 is connected to the cone apex of the first filter membrane 9 and the lower end is connected to the cone apex of the liquid guide plate 12. The second filter membrane 13 is conical in shape, and the outer edge of the cone is fitted to the skirt of the liquid guide plate 12. One end of the second sludge pipe 14 is connected to the cone apex of the second filter membrane 13, and the other end extends down to the feed end of the drain pipe 5. The liquid guide plate 12 is horizontally fixedly installed in the inner cavity of the cylinder 2 and is located between the first filter membrane 9 and the second filter membrane 13. The guide groove 15 is arranged around the edge of the liquid guide plate 12 and acts to guide the liquid after passing through the first filter membrane 9. In the above structure, by setting both the first filter membrane 9 and the liquid guide plate 12 as conical shapes and symmetrically arranged with the first sludge passage 11 as the center, the concentrated sludge scraped off the surface of the first filter membrane 9 can be smoothly collected and introduced into the first sludge passage 11, and then fall to the cone top surface of the second sludge passage 14 via the liquid guide plate 12. At the same time, the preliminary filtrate passing through the first filter membrane 9 flows along its outer wall and is collected by the guide groove 15 surrounding the edge of the liquid guide plate 12 and guided to the top of the second filter membrane 13. The second filter membrane 13 is also conical and its outer edge is in contact with the skirt of the liquid guide plate 12. This structure ensures that the primary filtrate can all enter the second stage for fine filtration, and the sludge produced is directly discharged into the sewage pipe 5 through the second sludge passage 14.

[0018] In a preferred embodiment: the number of spiral shafts 18 is two, and they are respectively located at the cone-shaped outlet of the first filter membrane 9 and the second filter membrane 13. The spiral outer edges of the two spiral shafts 18 are adapted to the inner cavities of the first filtrate pipe 11 and the second filtrate pipe 14. In the above structure, by starting the motor 6, the outer edge of the output shaft of the motor 6 drives the rotating shaft 8 to rotate synchronously through the coupling 7, thereby driving the two spiral shafts 18 located at the cone top outlets of the first filter membrane 9 and the second filter membrane 13 to rotate. Since the spiral outer edge of the spiral shaft 18 is adapted to the inner cavity of the first filtrate pipe 11 and the second filtrate pipe 14, the rotating spiral shaft 18 pushes the impurities collected from the cone top of the first filter membrane 9 and the second filtrate pipe 14 to the downstream drain pipe 5 through continuous axial pushing force, thereby achieving smoother continuous, stable and efficient operation of the impurity removal device.

[0019] In a preferred embodiment: the number of L-shaped scrapers 16 and disassembly / removal components 17 is three, and each L-shaped scraper 16 and disassembly / removal component 17 is a group, arranged in a circular array with a spacing of 120 degrees. The three L-shaped scrapers 16, the disassembly / removal components 17 and the mounting ring 10 are regarded as a group of movable components, and the number of such movable components is two, respectively arranged at the conical opening of the first filter membrane 9 and the second filter membrane 13. The outer edges of the three L-shaped scrapers 16 are respectively attached to and slidably disposed against the outer walls of the first filter membrane 9 and the second filter membrane 13. In the above structure, by arranging three L-shaped scrapers 16 and the disassembly assembly 17 in a circular array with a spacing of 120 degrees, and forming a set of movable components with the mounting ring 10, and setting a set at the conical opening of the first filter membrane 9 and the second filter membrane 13 respectively, the inner walls of the first filter membrane 9 and the second filter membrane 13 are comprehensively and synchronously scraped in sequence. When the rotating shaft 8 drives the movable component to rotate, the three symmetrically distributed L-shaped scrapers 16 can stably and evenly remove impurities attached to the inner walls of the first filter membrane 9 and the second filter membrane 13, thereby preventing local clogging of the first filter membrane 9 and the second filter membrane 13.

[0020] In a preferred embodiment: the disassembly assembly 17 includes a positioning groove 171 formed in the inner wall of the mounting ring 10, a positioning pin 172 fixedly mounted on the top of the L-shaped scraper 16, a first circular groove 173 formed in the inner wall of the positioning pin 172, a first slot 174, a sliding groove 175, a guide groove 176 and a second circular groove 177 formed in the inner wall of the mounting ring 10, a connector 178 formed in the inner wall of the L-shaped scraper 16, the connector 178 includes a transverse spring 1781 and a transverse convex pin 1782 respectively disposed in the inner cavity of the positioning pin 172, a second slot 1783 formed in the inner wall of the transverse convex pin 1782, a longitudinal convex pin 1784 and a longitudinal spring 1785 respectively disposed in the inner cavity of the sliding groove 175, a connecting rod 1786 disposed in the inner cavity of the guide groove 176, and a button 1787 disposed in the inner cavity of the second circular groove 177; In a preferred embodiment: the outer wall of the positioning pin 172 is adapted to the shape of the inner wall of the positioning groove 171; one end of the transverse convex pin 1782 is spherical, and the outer wall of the spherical shape is adapted to the shape of the inner wall of the first slot 174; the outer wall of the other end of the transverse convex pin 1782 is slidably fitted against the inner wall of the first circular groove 173; the transverse spring 1781 is located on one side of the transverse convex pin 1782, with one end overlapping the outer wall of the transverse convex pin 1782 and the other end overlapping the inner wall of the positioning groove 171; one end of the longitudinal convex pin 1784 has an inclined outer wall, and the inclined outer wall is slidably fitted against the outer wall of the spherical end of the transverse convex pin 1782; the longitudinal... The outer wall of the other end of the convex pin 1784 is slidably fitted against the inner wall of the slide groove 175. The longitudinal spring 1785 is located on one side of the longitudinal convex pin 1784, with one end overlapping the outer wall of the longitudinal convex pin 1784 and the other end overlapping the inner wall of the slide groove 175. The outer wall of the inclined end of the longitudinal convex pin 1784 is adapted to the shape of the inner wall of the second slot 1783. One end of the connecting rod 1786 is connected and fixed to the side wall of the longitudinal convex pin 1784, and the other end is connected and fixed to the side wall of the button 1787. The outer wall of the connecting rod 1786 is slidably fitted against the inner wall of the guide groove 176, and the outer wall of the button 1787 is slidably fitted against the inner wall of the second circular groove 177. In the above structure, when the L-shaped scraper 16 is connected to the mounting ring 10, it first aligns its positioning pin 172 with the positioning groove 171, and then pushes the positioning pin 172 upward so that when the positioning pin 172 is inserted into the inner cavity of the positioning groove 171, the spherical end of the transverse convex pin 1782 first contacts the inner wall of the positioning groove 171, so that the spherical end of the transverse convex pin 1782 is squeezed by the inner wall, and the other end slides along the inner wall of the first circular groove 173 and drives the transverse spring 1781 on one side to compress. Then, when the positioning pin 172 is fully inserted into the inner cavity of the positioning groove 171, the spherical end of the transverse convex pin 1782 will correspond to the inner wall of the first slot 174, so that the transverse convex pin 178... The spherical end of the transverse convex pin 1782 is rebounded and reset by the transverse spring 1781 on one side, and inserted into the inner cavity of the first slot 174. When the spherical end of the transverse convex pin 1782 is inserted into the inner cavity of the first slot 174, the spherical end of the transverse convex pin 1782 will first contact the inclined end of the longitudinal convex pin 1784. The inclined end of the longitudinal convex pin 1784 is squeezed by the spherical end of the transverse convex pin 1782. One end of the longitudinal convex pin 1784 is guided by its inclined surface, which drives the other end to slide along the inner wall of the slide groove 175. The sliding will drive the longitudinal spring 1785 on one side to compress it. When the spherical end of the transverse convex pin 1782 is fully inserted into the inner cavity of the first slot 174, the longitudinal convex pin 1782 will be compressed. The beveled end of the pin 1784 corresponds to the inner wall of the second slot 1783, allowing the beveled end of the longitudinal convex pin 1784 to be inserted into the inner cavity of the second slot 1783 by the return of the longitudinal spring 1785. This fixes the longitudinal convex pin 1784 to the transverse convex pin 1782, thus completing the installation connection between the L-shaped scraper 16 and the mounting ring 10. When the L-shaped scraper 16 needs to be removed for replacement, pressing the button 1787 causes it to slide along the inner wall of the second circular groove 177, driving the longitudinal spring 1785 to slide along the inner wall of the guide groove 176. This causes the longitudinal convex pin 1784, fixed to one side of the connecting rod 1786, to slide along the groove. The inner wall of slot 175 slides again, causing the inclined end of the sliding longitudinal convex pin 1784 to exit the inner cavity of the second slot 1783 and compress the longitudinal spring 1785, thus releasing the fixation applied to the spherical end of the transverse convex pin 1782. Then, by external force, the L-shaped scraper 16 moves downward, causing the L-shaped scraper 16 to drive the positioning pin 172 out of the inner cavity of the positioning groove 171. At the same time, the transverse convex pin 1782 is driven by the external force, causing it to disengage from the inner wall of the first slot 174 through the spherical surface of its spherical end. The transverse convex pin 1782 will then contact the inner wall of the positioning groove 171 again and be squeezed back into the inner cavity of the positioning groove 171, causing the transverse spring 1781 to compress.Simultaneously, when the L-shaped scraper 16 drives the positioning pin 172 to completely exit the inner cavity of the positioning groove 171, the transverse convex pin 1782 can be reset by the rebound of the transverse spring 1781. Then, when the button 1787 is released, the button 1787, connecting rod 1786, and longitudinal convex pin 1784 can be reset to their initial state by the rebound of their longitudinal spring 1785. This achieves the disassembly and separation of the L-shaped scraper 16 from the mounting ring 10, facilitating the replacement and maintenance of the L-shaped scraper 16.

[0021] Working principle: First, the brine mixture containing the precipitant enters the inner cavity of the cylinder 2 through the inlet pipe 4 and is evenly distributed on the top of the first-stage conical filter membrane 9, allowing the clear liquid to penetrate the micropores of the first filter membrane 9, achieving the first stage of filtration. Then, the trapped suspended solids and precipitates adhere to the inner wall of the first filter membrane 9, gradually forming a filter cake. At this point, the initial filtrate that has penetrated the first filter membrane 9 flows downwards along its outer wall and is collected by the guide groove 15 on the edge of the horizontally set guide plate 12. The guide groove 15 smoothly guides the filtrate to the top of the second filter membrane 13 for the second stage of filtration. The initial filtrate undergoes the same filtration process on the second filter membrane 13, and the final high-purity refined brine passes through the second filter membrane 13 and is collected by the bottom collection plate 19. The impurities are collected and discharged from the outlet 20 into the inner cavity of the cylinder 2. Then, the motor 6 is started, causing the outer edge of the motor 6's output shaft to drive the rotating shaft 8 through the coupling 7. This causes the rotating shaft 8 to drive the two sets of mounting rings 10 to rotate synchronously, causing the three L-shaped scrapers 16 mounted on the mounting rings 10 at the position of the first filter membrane 9 to rotate accordingly. The outer edges of these L-shaped scrapers 16 then adhere to the inner wall of the first filter membrane 9, continuously and evenly scraping off the filter cake on its surface, effectively preventing filter pore blockage. Simultaneously, the scraped impurities collect under gravity at the cone-shaped outlet of the first filter membrane 9. Here, the synchronously rotating first section of the spiral shaft 18 draws these impurities into the first sludge pipe 11 and pushes them downwards, allowing the impurities discharged from the first sludge pipe 11 to flow down through the guide plate 12. The impurities fall onto the surface of the second filter membrane 13, causing it to be scraped off by the second set of L-shaped scrapers 16 and collected at the cone-shaped outlet of the second filter membrane 13. Then, pushed by the rotation of the second spiral shaft 18, they pass through the second dirt pipe 14 and are discharged from the inner cavity of the cylinder 2 via the guide groove 15, thus completing the impurity removal process. Next, when the L-shaped scraper 16 is connected to the mounting ring 10, it first aligns its positioning pin 172 with the positioning groove 171, and then pushes the positioning pin 172 upward so that the positioning pin 172 is inserted into the inner cavity of the positioning groove 171. The spherical end of the transverse convex pin 1782 first contacts the inner wall of the positioning groove 171, and the spherical end of the transverse convex pin 1782 is squeezed by the inner wall. The other end enters... The pin slides along the inner wall of the first circular groove 173, causing the transverse spring 1781 on one side to compress. Then, when the positioning pin 172 is fully inserted into the inner cavity of the positioning groove 171, the spherical end of the transverse convex pin 1782 aligns with the inner wall of the first slot 174. This allows the spherical end of the transverse convex pin 1782 to spring back and re-enter the inner cavity of the first slot 174 via the transverse spring 1781. When the spherical end of the transverse convex pin 1782 is inserted into the inner cavity of the first slot 174, it first contacts the inclined end of the longitudinal convex pin 1784, causing the inclined end of the longitudinal convex pin 1784 to be compressed by the spherical end of the transverse convex pin 1782.One end of the longitudinal convex pin 1784 is guided by its inclined surface, causing the other end to slide along the inner wall of the slide groove 175. This sliding causes the longitudinal spring 1785 on one side to compress. When the spherical end of the transverse convex pin 1782 is fully inserted into the cavity of the first slot 174, the inclined end of the longitudinal convex pin 1784 will align with the inner wall of the second slot 1783. The inclined end of the longitudinal convex pin 1784 is then reset by the springback of the longitudinal spring 1785 and inserted into the cavity of the second slot 1783, thus realizing the insertion of the longitudinal convex pin. 1784 fixes the transverse convex pin 1782, thereby completing the installation connection between the L-shaped scraper 16 and the mounting ring 10. When the L-shaped scraper 16 needs to be removed for replacement, pressing the button 1787 causes it to slide along the inner wall of the second circular groove 177, driving the longitudinal spring 1785 to slide along the inner wall of the guide groove 176. This causes the longitudinal convex pin 1784, fixed to one side of the connecting rod 1786, to slide again along the inner wall of the slide groove 175, causing the inclined end of the sliding longitudinal convex pin 1784 to retract. The longitudinal spring 1785 is compressed as the second slot 1783 exits its inner cavity, releasing the fixation applied to the spherical end of the transverse convex pin 1782. Then, the L-shaped scraper 16 moves downward by external force, causing the locating pin 172 to exit the inner cavity of the locating groove 171. Simultaneously, the L-shaped scraper 16 pulls the transverse convex pin 1782, causing it to disengage from the inner wall of the first slot 174 through the spherical surface of its spherical end. This allows the transverse convex pin 1782 to re-enter the inner wall of the locating groove 171 and be compressed back into the locating groove 171. The inner cavity of the L-shaped scraper 16 compresses the transverse spring 1781. Simultaneously, when the L-shaped scraper 16 completely withdraws the positioning pin 172 from the inner cavity of the positioning groove 171, the transverse convex pin 1782 resets due to the springback of the transverse spring 1781. Then, releasing the button 1787 allows the button 1787, connecting rod 1786, and longitudinal convex pin 1784 to reset to their initial state due to the springback of the longitudinal spring 1785. This facilitates the disassembly and separation of the L-shaped scraper 16 from the mounting ring 10, making it easier to replace and maintain the L-shaped scraper 16.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brine purification device for chlor-alkali chemical industry, comprising a support base (1), characterized in that: A cylinder (2) is fixedly installed on the top of the support base (1). A cover plate (3) is provided on the top of the cylinder (2). A water inlet pipe (4) is provided on the side wall of the cylinder (2). A drain pipe (5) is provided on the side wall of the cylinder (2) away from the water inlet pipe (4). A liquid collection plate (19) is fixedly installed on the bottom of the cylinder (2). A water outlet (20) is provided on the bottom of the liquid collection plate (19). A motor (6) is fixedly installed on the top of the cover plate (3). A coupling (7) is fixedly sleeved on the outer edge of the output shaft of the motor (6). The inner wall of the coupling (7) is fixedly sleeved with... The cylinder (2) has a rotating shaft (8), and the inner cavity of the cylinder (2) is respectively provided with a first filter membrane (9), a liquid guide plate (12), and a second filter membrane (13). The outer wall of the rotating shaft (8) is fixedly sleeved with an installation ring (10) and a spiral shaft (18). The bottom of the first filter membrane (9) is provided with a first dirt-passing pipe (11), and the bottom of the second filter membrane (13) is provided with a second dirt-passing pipe (14). The outer wall of the installation ring (10) is provided with an L-shaped scraper (16), and the inner cavity of the installation ring (10) is provided with a disassembly and assembly assembly (17). The top of the liquid guide plate (12) is provided with a guide groove (15).

2. The brine purification device for chlor-alkali chemical industry according to claim 1, characterized in that: The first filter membrane (9) and the liquid guide plate (12) are both conical in shape and are symmetrically arranged with the first sludge pipe (11) as the center. The upper end of the first sludge pipe (11) is connected to the cone top of the first filter membrane (9) and the lower end is connected to the cone top of the liquid guide plate (12). The second filter membrane (13) is conical in shape and the outer edge of the cone is attached to the skirt of the liquid guide plate (12). One end of the second sludge pipe (14) is connected to the cone top of the second filter membrane (13) and the other end extends down to the feed end of the drain pipe (5). The liquid guide plate (12) is horizontally fixed in the inner cavity of the cylinder (2) and is located between the first filter membrane (9) and the second filter membrane (13). The guide groove (15) is arranged around the edge of the liquid guide plate (12) and acts to guide the liquid after passing through the first filter membrane (9).

3. The brine purification device for chlor-alkali chemical industry according to claim 1, characterized in that: The number of the spiral shafts (18) is two, and they are located at the cone-shaped outlets of the first filter membrane (9) and the second filter membrane (13), respectively. The outer spiral edges of the two spiral shafts (18) are adapted to the inner cavities of the first sewage pipe (11) and the second sewage pipe (14).

4. A brine purification device for chlor-alkali chemical industry according to claim 1, characterized in that: The number of L-shaped scrapers (16) and disassembly / removal components (17) is three, and each L-shaped scraper (16) and disassembly / removal component (17) is a group, arranged in a circular array with a spacing of 120 degrees. The three L-shaped scrapers (16), disassembly / removal components (17) and mounting ring (10) are regarded as a group of movable components, and the number of such movable components is two, respectively set at the cone top opening of the first filter membrane (9) and the second filter membrane (13). The outer edges of the three L-shaped scrapers (16) are respectively attached to and slidably arranged with the outer walls of the first filter membrane (9) and the second filter membrane (13).

5. A brine purification device for chlor-alkali chemical industry according to claim 1, characterized in that: The disassembly and assembly assembly (17) includes a positioning groove (171) on the inner wall of the mounting ring (10), a positioning pin (172) fixedly mounted on the top of the L-shaped scraper (16), a first circular groove (173) on the inner wall of the positioning pin (172), a first slot (174), a sliding groove (175), a guide groove (176) and a second circular groove (177) respectively on the inner wall of the mounting ring (10), and a connector (178) on the inner wall of the L-shaped scraper (16). (178) includes a transverse spring (1781) and a transverse convex pin (1782) respectively disposed in the inner cavity of the positioning pin (172). The inner wall of the transverse convex pin (1782) is provided with a second slot (1783). The inner cavity of the slide (175) is provided with a longitudinal convex pin (1784) and a longitudinal spring (1785). The inner cavity of the guide groove (176) is provided with a connecting rod (1786). The inner cavity of the second circular groove (177) is provided with a button (1787).

6. A brine purification device for chlor-alkali chemical industry according to claim 5, characterized in that: The outer wall of the positioning pin (172) is adapted to the shape of the inner wall of the positioning groove (171). One end of the transverse convex pin (1782) is spherical, and the outer wall of the spherical shape is adapted to the shape of the inner wall of the first slot (174). The outer wall of the other end of the transverse convex pin (1782) is slidably fitted against the inner wall of the first circular groove (173). The transverse spring (1781) is located on one side of the transverse convex pin (1782), and one end overlaps with the outer wall of the transverse convex pin (1782), and the other end overlaps with the inner wall of the positioning groove (171). One end of the longitudinal convex pin (1784) has an inclined outer wall, and the outer wall of the inclined surface is slidably fitted against the outer wall of the spherical end of the transverse convex pin (1782). The longitudinal convex pin (1784) is slidably fitted against the outer wall of the spherical end of the transverse convex pin (1782). The other end of the outer wall of the 84) is slidably fitted against the inner wall of the slide groove (175). The longitudinal spring (1785) is located on one side of the longitudinal convex pin (1784), with one end overlapping the outer wall of the longitudinal convex pin (1784) and the other end overlapping the inner wall of the slide groove (175). The outer wall of the inclined end of the longitudinal convex pin (1784) is adapted to the shape of the inner wall of the second slot (1783). One end of the connecting rod (1786) is connected and fixed to the side wall of the longitudinal convex pin (1784), and the other end is connected and fixed to the side wall of the button (1787). The outer wall of the connecting rod (1786) is slidably fitted against the inner wall of the guide groove (176), and the outer wall of the button (1787) is slidably fitted against the inner wall of the second circular groove (177).

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