Tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent brine.

Abstract

This utility model relates to the field of concentrated brine purification technology, specifically a tubular membrane nanofiltration reactor for removing fluoride and silica from monovalent concentrated brine. It includes an outer shell; a membrane shell, fixedly installed inside the outer shell, designed in a cylindrical shape, with a gap between its outer wall and the inner wall of the outer shell; a tubular membrane, movably installed inside the membrane shell, with multiple filter holes arranged in a ring array on its outer surface; multiple outlet holes, movably penetrating the outer shell and the side wall of the membrane shell, communicating with the filter holes; an outlet pipe, fixedly installed at the outlet hole; a pipe, fixedly installed on both ends of the tubular membrane, communicating with the interior of the tubular membrane; a connecting pipe, movably snapped into the pipe; and a snap-fit ​​assembly, located at the connection between the connecting pipe and the pipe, ensuring a stable connection. The tubular membrane nanofiltration reactor for removing fluoride and silica from monovalent concentrated brine provided by this utility model improves the connection stability between the connecting pipe and the pipe through the snap-fit ​​assembly, ensuring sufficiently stable connections between adjacent tubular membranes.

Description

Technical Field

[0001] This utility model relates to the field of concentrated brine purification technology, and in particular to a tubular membrane nanofiltration reactor for removing fluoride and silicon from monovalent concentrated brine. Background Technology

[0002] Monovalent brine typically refers to high-concentration brine with monovalent ions such as sodium ions as the main components. It is commonly found in seawater desalination, lithium extraction from salt lakes, and concentrated solutions after the deep treatment of industrial wastewater (such as chlor-alkali industry and food processing wastewater). Fluorine and silicon may exist in concentrated brine in a dissolved state (such as fluoride ions F⁻, soluble silicates) or a colloidal / suspended state (such as silica colloids, calcium fluoride microprecipitates). Fluorine and silicon removal is required before it can meet emission standards or proceed to the next step of the process.

[0003] In existing technologies, tubular membrane nanofiltration reactors are commonly used to filter concentrated brine. After the concentrated brine is filled into the tubular membrane, fluoride and silicon are trapped inside the membrane, while small molecules and water flow out of the tubular membrane. This process can separate fluoride and silicon, allowing the water to meet discharge standards. However, the length of the tubular membrane is limited. Adjacent tubular membranes are connected end to end by pluggable pipes, which increases the overall length of the tubular membrane. But simply connecting the tubular membranes by plugging in pipes is not stable enough. Fluid impact, vibration, or installation errors can cause the connection to loosen or even break, affecting the filtration and purification of the brine. Summary of the Invention

[0004] Therefore, it is necessary to provide a tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent brine, which can improve the stability of tubular membrane connections, in order to address the above-mentioned technical problems.

[0005] The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine provided by this utility model includes a shell; The membrane shell is fixedly installed inside the outer shell and is designed to be cylindrical, with a gap between the outer wall and the inner wall of the outer shell. A tubular membrane is movably installed inside the membrane housing, and multiple filter pores are arranged in a ring array on its outer surface. The water outlet hole extends through the outer shell and the side wall of the membrane shell, and communicates with the filter hole; multiple outlet holes are provided. The water outlet pipe is fixedly installed at the water outlet hole; The pipes are fixedly installed on both ends of the tubular membrane and are interconnected with the interior of the tubular membrane; The connecting pipe is installed inside the pipe via a movable snap-fit ​​connection. A snap-fit ​​assembly is provided at the connection between the connecting pipe and the pipeline to ensure a stable connection between the two.

[0006] In one embodiment, the snap-fit ​​assembly includes a positioning block, which is axially symmetrically fixedly installed at the upper and lower ends of the connecting pipe. The upper and lower ends of the pipe are provided with movable grooves, and the positioning block is slidably connected to the movable grooves. Through holes are axially symmetrically provided on both sides of the pipe, and vertical rods are movably arranged in the through holes. Positioning grooves are provided on the positioning blocks, and the bottom of the vertical rods movably abuts against the positioning grooves.

[0007] In one embodiment, a positioning ring is fixedly provided at the bottom of the vertical rod, and the positioning ring is connected to the upper inner wall of the movable groove by a positioning spring, and the positioning ring movably abuts against the positioning groove.

[0008] In one embodiment, a groove is provided on one side of the positioning block, and the surface of the groove movably abuts against the positioning ring.

[0009] In one embodiment, the positioning block has a groove on one side of the positioning slot, and a limiting ball is provided in the groove. The limiting ball is made of an elastic material. The pipe has a limiting groove on the side wall of the moving slot, and the limiting ball moves and abuts against the limiting groove.

[0010] In one embodiment, a ring is fixedly disposed in the limiting groove, and a push rod is movably disposed through the center of the ring. The push rod and the ring are fixedly connected by a return spring, and the end of the push rod movably abuts against the limiting ball.

[0011] The tubular membrane nanofiltration reactor described above for defluorination and desiliconization of monovalent brine can improve the connection stability between connecting tubes and pipes through the snap-fit ​​assembly, ensuring that the connection between adjacent tubular membranes is sufficiently stable. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the filter hole structure in this utility model; Figure 3 This is a schematic diagram of the connection structure between the pipe and the connecting pipe in this utility model; Figure 4 This is a schematic diagram of the snap-fit ​​assembly in this utility model; Figure 5This is a schematic diagram of the reset spring in this utility model.

[0014] Figure label: 1. Outer shell; 2. Membrane shell; 3. Tubular membrane; 31. Filter pores; 4. Water outlet; 5. Water outlet pipe; 6. Pipe; 61. Limiting groove; 7. Connecting pipe; 8. Snap-fit ​​assembly; 81. Positioning block; 811. Groove; 82. Moving groove; 83. Through hole; 84. Vertical rod; 85. Positioning groove; 86. Positioning ring; 87. Positioning spring; 88. Inclined groove; 9. Limiting ball; 10. Ring; 11. Top rod; 12. Return spring. Detailed Implementation

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

[0016] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] The following is combined Figures 1-5 This invention describes a tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine.

[0021] like Figures 1-4 As shown, in one embodiment, the tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent brine includes an outer shell 1, a membrane shell 2, a tubular membrane 3, an outlet pipe 5, a pipe 6, a connecting pipe 7, and a snap-fit ​​assembly 8.

[0022] The membrane shell 2 is fixedly installed inside the outer shell 1, with a gap between them. The tubular membrane 3 is movably installed inside the membrane shell 2. Multiple water outlet holes 4 are opened on both sides of the outer shell 1. Water outlet pipes 5 are installed at the water outlet holes 4 for drainage. Pipes 6 are provided at both ends of the tubular membrane 3. Connecting pipes 7 are inserted into the pipes 6. Adjacent tubular membranes 3 are connected through the connecting pipes 7. The snap-fit ​​component 8 can ensure the stability of the connection between the connecting pipe 7 and the pipe 6.

[0023] Specifically, the outer shell 1 is fixedly mounted on the bracket, and the membrane shell 2 is installed inside the outer shell 1. Glycerin is applied to the inside of the membrane shell 2 for lubrication, which facilitates the insertion of the tubular membrane 3 into the membrane shell 2 and reduces friction between the two. After part of the tubular membrane 3 is pushed in, the connecting tube 7 is inserted into the pipe 6. The connection between the connecting tube 7 and the pipe 6 is made more stable using the snap-fit ​​component 8. Then, one end of the pipe 6 of another tubular membrane 3 is connected to the other end of the connecting tube 7, and the other end is also fixed and stable using the snap-fit ​​component 8. This process is repeated until multiple tubular membranes 3 are connected end to end and installed inside the membrane shell 2. After completion, the outermost tubular membrane 3 is connected to the brine outlet pipe 5 via the pipe 6. The brine enters the first tubular membrane 3 and then enters the next tubular membrane 3 via the connecting pipe 7. The outer side of the tubular membrane 3 has filter holes 31, which prevent large particles from passing through. They pass through multiple tubular membranes 3 along with the concentrated solution and are discharged through the last tubular membrane 3. Small particles such as water molecules can be discharged through the filter holes 31 and then discharged through the outlet hole 4 and the blow pipe. This can separate large particles from water molecules and can filter and separate substances such as fluoride ions and silicon ions in concentrated brine.

[0024] See Figure 3 and Figure 4 As shown, in this embodiment, the snap-fit ​​assembly 8 includes a positioning block 81, which is axially symmetrically fixedly installed at the upper and lower ends of the connecting pipe 7. The upper and lower ends of the pipe 6 are provided with moving grooves 82, and the positioning block 81 is slidably connected to the moving grooves 82. The pipe 6 is axially symmetrically provided with through holes 83 on both sides, and a vertical rod 84 is movably arranged in the through holes 83. The positioning block 81 is provided with a positioning groove 85, and the bottom of the vertical rod 84 is movably abutting against the positioning groove 85.

[0025] Specifically, after the first tubular membrane 3 is inserted into the membrane shell 2, the connecting pipe 7 is inserted into the corresponding pipe 6. The connecting pipe 7 drives the positioning block 81 to move along the moving groove 82 opened in the pipe 6. When the positioning block 81 moves to the positioning groove 85 and is below the vertical rod 84, the vertical rod 84 moves downward along the through hole 83. The bottom of the vertical rod 84 is placed in the positioning groove 85. At this time, the positioning block 81 and the connecting pipe 7 are in an immovable state, which can ensure the stability between the connecting pipe 7 and the pipe 6.

[0026] See Figure 3 and Figure 4 As shown, in this embodiment, a positioning ring 86 is fixedly provided at the bottom of the vertical rod 84. The positioning ring 86 is connected to the upper inner wall of the moving groove 82 by a positioning spring 87, and the positioning ring 86 is in movable contact with the positioning groove 85.

[0027] Specifically, in the initial state, the positioning spring 87 is in a normal extension and contraction state. First, the vertical rod 84 moves upward along the through hole 83. The vertical rod 84 drives the positioning ring 86 to move upward, thereby compressing the positioning spring 87. Then, the connecting pipe 7 is inserted into the pipe 6. The connecting pipe 7 drives the positioning block 81 to move together until the positioning groove 85 is below the positioning ring 86. Then, the force applied to the vertical rod 84 is removed. Under the action of the positioning spring 87, the positioning ring 86 and the vertical rod 84 move downward. The positioning ring 86 engages with the positioning groove 85 to ensure the stability of the connection between the two.

[0028] See Figure 4 As shown, in this embodiment, a groove 88 is provided on one side of the positioning block 81, and the surface of the groove 88 is in movable contact with the positioning ring 86.

[0029] Specifically, when the connecting pipe 7 moves the positioning block 81 toward the inside of the pipe 6, the inclined groove 88 will first abut against the positioning ring 86. The positioning ring 86 moves upward relative to the inclined groove 88, compressing the positioning spring 87. Then, the positioning ring 86 moves along the high point of the inclined groove 88 until it is aligned with the positioning groove 85. Under the action of the positioning spring 87, the positioning ring 86 abuts against the positioning groove 85, making the operation convenient and quick.

[0030] See Figure 4 As shown, in this embodiment, the positioning block 81 has a groove 811 on one side of the positioning groove 85, and a limiting ball 9 is provided in the groove 811. The limiting ball 9 is made of an elastic material. The pipe 6 has a limiting groove 61 on the side wall of the moving groove 82, and the limiting ball 9 and the limiting groove 61 are in movable contact.

[0031] Specifically, the limiting ball 9 is made of an elastic material. When the positioning block 81 moves along the moving groove 82, the limiting ball 9 is compressed by the inner wall of the moving groove 82 and shrinks into the groove 811. When the limiting ball 9 moves below the limiting groove 61, it will engage with the limiting groove 61 after losing the compression of the inner wall of the moving groove 82. At this time, the positioning ring 86 also engages with the positioning groove 85, which can further ensure the stability of the connection between the connecting pipe 7 and the pipeline 6.

[0032] See Figures 3-5 As shown, in this embodiment, a ring 10 is fixedly installed in the limiting groove 61, and a push rod 11 is movably installed through the center of the ring 10. The push rod 11 and the ring 10 are fixedly connected by a return spring 12, and the end of the push rod 11 movably abuts against the limiting ball 9.

[0033] Specifically, when it is necessary to release the engagement between the limiting ball 9 and the limiting groove 61, the push rod 11 is pressed down along the limiting groove 61. The push rod 11 moves downward and comes into contact with the limiting ball 9, squeezing the limiting ball 9 downward. The limiting ball 9 will then release the engagement with the limiting groove 61. During this process, the return spring 12 will be compressed. After the connecting pipe 7 is removed from the pipe 6, the push rod 11 is no longer pressed down. Under the action of the return spring 12, the push rod 11 will return to its initial position. The ring 10 provides support for the return spring 12.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine, characterized in that, Including the outer casing; The membrane shell is fixedly installed inside the outer shell and is designed to be cylindrical, with a gap between the outer wall and the inner wall of the outer shell. A tubular membrane is movably installed inside the membrane housing, and multiple filter pores are arranged in a ring array on its outer surface. The water outlet hole extends through the outer shell and the side wall of the membrane shell, and communicates with the filter hole; multiple outlet holes are provided. The water outlet pipe is fixedly installed at the water outlet hole; The pipes are fixedly installed on both ends of the tubular membrane and are interconnected with the interior of the tubular membrane; The connecting pipe is installed inside the pipe via a movable snap-fit ​​connection. A snap-fit ​​assembly is provided at the connection between the connecting pipe and the pipeline to ensure a stable connection between the two.

2. The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine according to claim 1, characterized in that, The snap-fit ​​assembly includes a positioning block, which is axially symmetrically fixedly installed at the upper and lower ends of the connecting pipe. The upper and lower ends of the pipe are provided with movable grooves. The positioning block is slidably connected to the movable grooves. Through holes are axially symmetrically provided on both sides of the pipe. A vertical rod is movably arranged in the through hole. A positioning groove is provided on the positioning block. The bottom of the vertical rod is movably abutted against the positioning groove.

3. The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine according to claim 2, characterized in that, A positioning ring is fixedly installed at the bottom of the vertical rod. The positioning ring is connected to the upper inner wall of the moving groove by a positioning spring. The positioning ring movably abuts against the positioning groove.

4. The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine according to claim 3, characterized in that, A slanted groove is provided on one side of the positioning block, and the surface of the slanted groove is in movable contact with the positioning ring.

5. The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine according to claim 2, characterized in that, The positioning block has a groove on one side of the positioning slot, and a limiting ball is provided in the groove. The limiting ball is made of an elastic material. The pipe has a limiting groove on the side wall of the moving slot, and the limiting ball moves and abuts against the limiting groove.

6. The tubular membrane nanofiltration reactor for defluorination and desiliconization of monovalent concentrated brine according to claim 5, characterized in that, A ring is fixedly installed inside the limiting groove, and a push rod is movably installed through the center of the ring. The push rod and the ring are fixedly connected by a return spring, and the end of the push rod movably abuts against the limiting ball.

Images