A membrane assembly for extracting uranium from seawater for engineering application and its preparation method

Abstract

The present invention belongs to the technical field of uranium extraction from seawater, and in particular, relates to a membrane assembly for uranium extraction from seawater for engineering applications and a preparation method thereof. The present invention provides a method for preparing a membrane assembly for uranium extraction from seawater for engineering applications, comprising a horizontal elm board, a vertical elm board, four lower membrane boxes, a support rod, and a PC board with UV printed label information. The membrane filaments of the membrane assembly for uranium extraction from seawater for engineering applications prepared by the present invention are evenly distributed, the membrane filaments can be vertically immersed in seawater, the membrane filaments are in full contact with seawater, the marking information of the membrane assembly will not be eroded by seawater, the label information can be seen in different directions, the membrane assembly can be deployed in large quantities in the sea, and the damaged and broken membrane filaments will also remain on the support rod, fully ensuring that each membrane filament deployed in the sea can be recovered.

Description

Technical Field

[0001] The invention belongs to the technical field of uranium extraction from seawater, and in particular relates to a membrane component for uranium extraction from seawater for engineering application and a preparation method thereof. Background Art

[0002] The uranium resources in seawater are huge. Researchers are constantly committed to the research of new materials for extracting uranium from seawater, and have made many breakthroughs. Our research group has synthesized inorganic materials, modified fibers and other adsorption materials, and conducted performance tests under uranium solutions and simulated seawater conditions. We have also conducted real sea tests by immersion or dragging on the seawater uranium extraction experimental platforms in the Yellow Sea (Dalian) and the Yellow Sea (Rongcheng). However, with the deepening of research, there are still many challenges in extracting uranium from seawater.

[0003] Modified hollow fiber membrane is put into sea Figure 1 As shown in the figure, they have the following problems in the actual sea deployment process:

[0004] Question 1: The membrane fibers float on the surface of seawater and are easily contaminated by floating objects on the surface of seawater.

[0005] The membrane fibers are placed in the seawater, and due to the influence of buoyancy, the membrane fibers float on the surface of the seawater. Under the influence of the water flow, floating objects in the seawater are easily gathered on the surface of the membrane fibers. Since the position of the membrane fibers is relatively less mobile, the floating objects in the seawater are not easy to remove from the membrane fibers and the fixed membrane fibers. The floating objects in the seawater gather on the surface of the membrane fibers for a long time, and as time goes by, the floating objects in the seawater gather more and more on the membrane fibers and the fixed membrane fibers. The accumulation of floating objects not only pollutes the membrane fibers, but also breeds a large number of bacteria, aggravating the pollution of the membrane fibers.

[0006] Question 2: The membrane fibers are easily exposed to direct sunlight on the seawater surface, and the adsorption membrane material is prone to aging, which affects its service life.

[0007] The membrane fibers float on the surface of the seawater and are easily exposed to direct sunlight. The ultraviolet rays in the sunlight can easily cause aging of the polymer membrane material, seriously affecting the service life of the membrane fibers.

[0008] Question 3: The membrane fibers float on the surface of seawater, resulting in low uranium adsorption.

[0009] The membrane filaments float on the surface of seawater, and some of them are even attached to the surface of seawater: first, the membrane filaments cannot fully contact with seawater, resulting in a reduced probability of contact between the adsorption groups in the membrane filaments and uranium in seawater, resulting in low uranium adsorption by the membrane filaments; secondly, floating objects in seawater tend to gather on the surface of the membrane filaments to contaminate the membrane filaments, and will breed a large number of bacteria, aggravating the contamination of the membrane filaments, resulting in difficulty for uranium in seawater to contact with the adsorption groups in the membrane filaments, resulting in low uranium adsorption by the membrane filaments; finally, ultraviolet rays in sunlight cause aging of the membrane filaments, resulting in easy shedding of the adsorption groups in the membrane filaments, reducing the uranium adsorption by the membrane filaments.

[0010] Question 4: Direct placement of membrane threads will cause the membrane thread fixing ropes to become entangled with each other, making sampling difficult.

[0011] When membrane fibers are directly placed in seawater, the ropes used to fix the membrane fibers in a certain sea area are easily entangled under the influence of seawater currents, causing the membrane fibers to be intertwined with each other, making it impossible to take samples individually in the later stage, and also making it difficult to recover the membrane fibers from the seawater in the later stage.

[0012] From the above problems, it can be seen that floating objects in seawater cause membrane wire pollution, affecting the uranium adsorption capacity of the membrane wire. Ultraviolet rays in sunlight can easily cause membrane wire aging, affecting the service life of the membrane wire, and also affecting the uranium adsorption capacity of the membrane wire.

[0013] The above problems affect and restrict each other, which seriously hinders the industrialization process of membrane materials for seawater uranium extraction and must be solved comprehensively and systematically. The existing technology has the following technical difficulties in comprehensively solving the above problems:

[0014] Technical difficulty 1: The membrane fibers cannot be immersed vertically in seawater.

[0015] When the membrane threads are deployed in the sea, if the membrane threads are tied into bundles and weights are added directly on the membrane threads, the membrane threads will sink directly into the seawater, and it is impossible to ensure that each membrane thread is vertically immersed; if weights are added to each membrane thread, the project workload is huge, and the membrane threads are easily entangled under the action of seawater flow, and it is impossible to ensure that each membrane thread is vertically immersed.

[0016] Technical Difficulty 2: Tying the membrane fibers in the middle makes it impossible to evenly distribute the membrane fibers in the seawater and it is not easy to take samples in different time periods.

[0017] When the membrane wires are tied in the middle, the membrane wires will be squeezed together at the binding position, resulting in uneven distribution of the membrane wires in the seawater at the binding position, and it is not easy for the membrane wires to fully contact the seawater, thereby reducing the uranium adsorption amount of the membrane wires; because the membrane wires are tied in the middle, the membrane wires are not easy to be pulled out from the binding position during the later sampling, which is not conducive to sampling and detection in different time periods.

[0018] Technical Difficulty 3: The membrane fibers cannot be effectively marked when directly immersed in seawater, which is not conducive to large-scale deployment in the sea.

[0019] When deploying membranes in the sea, each batch of different membrane samples needs to be marked. If the mark is placed on the top of the fixed rope, the fixed ropes that fix the membranes in a certain sea area are easily entangled under the action of seawater currents, causing the membranes to be intertwined with each other, making it impossible to sample them separately later; if the mark is placed on the membrane, the mark is directly immersed in seawater, which is easy to be eroded by seawater on the one hand, and the mark is difficult to see clearly on the other hand, which is not conducive to large-scale deployment in the sea.

[0020] Technical Difficulty 4: It is impossible to add weight to each membrane filament in seawater and the membrane filament cannot be recovered after it is damaged or broken.

[0021] When deploying membrane filaments in the sea, if each membrane filament is weighted: first, the huge amount of work is not conducive to engineering scale-up; second, the membrane filaments with weights are easily entangled under the action of seawater flow, which is not conducive to sampling and recovery; third, the membrane filaments with weights are easily rubbed against each other under the action of seawater flow, causing damage to the membrane filaments, resulting in the inability to recover the damaged and broken membrane filaments; fourth, the strength of the membrane filaments has requirements on the weight of the weight. If it is too heavy, the membrane filaments are easy to break, and if it is too light, it will not play the role of a weight. Summary of the invention

[0022] In view of the above technical problems and technical difficulties, the following technical ideas are proposed:

[0023] Regarding technical difficulty 1: the present invention firstly casts the upper end of the membrane wire in different regions on the horizontal elm board with epoxy resin. The horizontal elm board serves as the upper membrane box of the membrane assembly, as a load-bearing object to ensure that the entire assembly is stably suspended above the seawater surface, and as a carrier of the label; secondly, the lower end of the membrane wire is cast and fixed in the four lower membrane boxes with epoxy resin; thirdly, a support rod is added between the upper and lower membrane boxes to ensure that the membrane wire can be vertically immersed in the seawater, to carry a counterweight, to prevent the loss of damaged and broken membrane wires, and to connect the horizontal elm board with the membrane wire and the four lower membrane boxes to make the membrane assembly a stable whole; finally, the four lower membrane boxes are fixed to the support rod with a fixed rope, and a counterweight is added to ensure that the membrane wire of the entire assembly is vertically immersed in the seawater. The synergy between the components is utilized to complement each other and form a whole through interaction, which fully ensures that the membrane wire of the entire assembly is vertically immersed in the seawater.

[0024] Technical Difficulty 2: The present invention casts epoxy resin on the upper end of the membrane wire in different areas on the horizontal elm board, and casts epoxy resin on the lower end of the membrane wire in four lower membrane boxes. The membrane wire is not tied to ensure that each membrane wire is evenly immersed in seawater. When sampling later, each membrane wire can be cut off at both ends of the membrane assembly at any time and removed directly, which is convenient for operation.

[0025] Regarding technical difficulty 3: the present invention first uses PC board to print label information through UV to ensure that the label information is not corroded by seawater; secondly, the PC board is fixed on the horizontal elm board as the first label on the sea water surface, which is conducive to observing the marker from the direction perpendicular to the sea level; finally, a vertical elm board is added between the two horizontal elm boards, and the PC board with printed label information is fixed on the two surfaces of the vertical elm board to ensure that the label information can also be seen from the direction parallel to the sea level, thereby ensuring that the membrane components can be deployed in large quantities in the sea.

[0026] Regarding technical difficulty 4: The present invention first fixes the upper end of the membrane wire on the horizontal elm board by pouring epoxy resin in different areas; secondly, the lower end of the membrane wire is poured and fixed in four lower membrane boxes by pouring epoxy resin; thirdly, a support rod is added between the upper and lower membrane boxes; finally, the four lower membrane boxes are fixed to the support rod with a fixing rope, and a counterweight is added, which is equivalent to adding a counterweight to the membrane wire of the entire assembly, and can ensure that each membrane wire is vertically immersed in seawater. Since the four lower membrane boxes are fixed to the support rod with a fixing rope, and the membrane wire is fixed to the four lower membrane boxes with epoxy resin, the damaged and broken membrane wire will remain on the support rod, fully ensuring that each membrane wire deployed in the sea can be recovered.

[0027] The present invention is based on the above-mentioned inventive concept, and makes full use of the synergy between the various components, complementing each other, and interacting with each other to form a whole, rather than a simple combination. The system adjusts the size of the elm board, the area and size of the membrane box on the elm board, the position of the support rod and the counterweight, and finally prepares a seawater uranium extraction membrane assembly for engineering application.

[0028] In order to achieve the purpose of the present invention, the present invention adopts the following technical scheme:

[0029] A membrane assembly for extracting uranium from seawater for engineering applications comprises a horizontal elm board, a vertical elm board, four lower membrane boxes, a support rod, and a PC board for UV printing label information.

[0030] A membrane assembly for extracting uranium from seawater for engineering application and a preparation method thereof, comprising the following steps:

[0031] Step 1: Fix the upper end of the membrane wire on the horizontal elm board with epoxy resin, and control the length of the horizontal elm board to 50cm-100cm, the width to 10cm-30cm, and the thickness to 5cm-10cm. Plane two areas of the same size on the horizontal elm board, and control the length of each area to 10cm-35cm, the width to 5cm-25cm, and the thickness to 3cm-7cm;

[0032] Step 2: Open 1-2 through holes with a diameter of 1 cm in two areas of the same size, install 316L stainless steel rods with a diameter of 1 cm in the through holes of the two areas of the same size, and control each area of ​​the same size to be divided into 4-8 smaller areas to place the membrane wire. Open a through hole with a diameter of 1 cm at 6 cm from both ends of the horizontal elm board, and open a through hole with a diameter of 1 cm in the middle of the horizontal elm board;

[0033] Step 3: Cast the lower end of the membrane wire with epoxy resin and fix it in four lower membrane boxes. Control the length of each lower membrane box to be 10cm-35cm, the width to be 5cm-25cm, and the height to be 3cm-7cm. Run 1-2 316L stainless steel rods with a diameter of 0.6cm through each lower membrane box. Control the lower membrane box to place the membrane wire in 2-12 smaller areas.

[0034] Step 4: The diameter of the support rod is controlled to be 1cm-2cm. A U-shaped groove is fixed on the upper end of the support rod. There is a through hole with a diameter of 1cm on the U-shaped groove. Both sides of the U-shaped groove are supported by 316L stainless steel rods with a diameter of 0.6cm. A triangular bracket is fixed on the lower end of the support rod;

[0035] Step 5: The length of the vertical elm board is controlled to be 50cm-100cm, the width is 10cm-30cm, and the thickness is 5cm-10cm. A through hole with a diameter of 1cm is opened at 6cm from both ends of the vertical elm board, and a through hole with a diameter of 1cm is opened in the middle of the vertical elm board;

[0036] Step 6: Connect and fix the two horizontal elm boards, the vertical elm boards and the support rods through the through holes with 316L stainless steel rods with a diameter of 1 cm. The support rods are fixed in the middle position. Lock buckles are installed on both ends of the exposed 316L stainless steel rods and fixed.

[0037] Step 7: Fix the PC board with UV printed label information on the horizontal elm board and the vertical elm board;

[0038] Step 8: Use fixing ropes to fix the four lower membrane boxes to the triangular bracket at the lower end of the support rod, and add counterweights to the triangular bracket to obtain a seawater uranium extraction membrane assembly for engineering applications.

[0039] Technical description: Step 1: In step 1, the length of the horizontal elm board is controlled to be 50cm-100cm, the width is 10cm-30cm, and the thickness is 5cm-10cm. The first reason is to ensure that the entire membrane assembly can be stably suspended above the seawater surface, and the second is to serve as a carrier for the label. Two areas of the same size are planed on the horizontal elm board, and the length of each area is controlled to be 10cm-35cm, the width is 5cm-25cm, and the thickness is 3cm-7cm. The first reason is to serve as the upper membrane box of the membrane assembly to better fix the membrane filaments and control the fixed length of the upper end of the membrane filaments and the pouring height of the epoxy resin to prevent the membrane filaments from falling off the horizontal elm board. The second reason is to serve as a load-bearing object to ensure the strength of the entire horizontal elm board and ensure that the entire assembly is stably suspended above the seawater surface.

[0040] Step 2: In step 2, 1-2 through holes with a diameter of 1 cm are respectively opened on the two areas of the same size, and 316L stainless steel rods with a diameter of 1 cm are installed in the through holes of the two areas of the same size. Each area of ​​the same size is divided into 4-8 smaller areas to place the membrane threads, in order to ensure that the membrane threads can be firmly fixed on the horizontal elm board and to ensure that the membrane threads are evenly distributed; 1 through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board, and 1 through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board, in order to ensure that the horizontal elm board with the upper end of the membrane threads fixed, the vertical elm board and the support rod can be connected together.

[0041] Step 3: In step 3, the length of each lower membrane box is controlled to be 10cm-35cm, the width is 5cm-25cm, and the height is 3cm-7cm. The purpose is to ensure that the membrane filaments are evenly distributed and to control the fixed length of the lower end of the membrane filaments and the pouring height of the epoxy resin. 1-2 316L stainless steel rods with a diameter of 0.6cm are passed through each lower membrane box to control the lower membrane box to be divided into 2-12 smaller areas to place the membrane filaments. The purpose is to ensure that the membrane filaments can be firmly fixed on the lower membrane box and will not fall off from the lower membrane box. The purpose is to ensure that the membrane filaments are evenly distributed.

[0042] Step 4: In step 4, the diameter of the support rod is controlled to be 1cm-2cm, and a U-shaped groove is fixed on the upper end of the support rod. There is a through hole with a diameter of 1cm on the U-shaped groove. There are 316L stainless steel rods with a diameter of 0.6cm on both sides of the U-shaped groove. A triangular bracket is fixed on the lower end of the support rod. The first is to ensure that the membrane filaments can be vertically immersed in seawater, the second is to be able to carry counterweights, the third is to prevent the loss of damaged and broken membrane filaments, and the fourth is to connect the horizontal elm board and the four lower membrane boxes to make the membrane assembly a stable whole; finally, the four lower membrane boxes are fixed to the support rod with fixed ropes and counterweights are added to ensure that the membrane filaments of the entire assembly are vertically immersed in seawater.

[0043] Step 5: In step 5, the length of the vertical elm board is controlled to be 50cm-100cm, the width is 10cm-30cm, and the thickness is 5cm-10cm to ensure the strength of the vertical elm board; a through hole with a diameter of 1cm is opened 6cm away from both ends of the vertical elm board, and a through hole of 1cm is opened in the middle of the vertical elm board to ensure that the horizontal elm board, the vertical elm board and the support rod can be connected together.

[0044] Step 6: In step 6, two horizontal elm boards, a vertical elm board and a support rod are connected and fixed through the through holes using a 316L stainless steel rod with a diameter of 1 cm. The support rod is fixed in the middle position, and locking buckles are installed at both ends of the exposed 316L stainless steel rod and fixed to ensure the stability of the entire membrane assembly.

[0045] Step 7: In step 7, the PC board with UV printed label information is fixed on the horizontal elm board and the vertical elm board. The first is to ensure that the label information is not corroded by sea water, the second is to facilitate observation of the marker from a direction perpendicular to the sea level, and the third is to ensure that the label information can also be seen from a direction parallel to the sea level, ensuring that the membrane components can be deployed in large quantities in the sea.

[0046] Step 8: In step 8, the four lower membrane boxes are fixed to the triangular bracket at the lower end of the support rod with a fixing rope, and a counterweight is added to the triangular bracket to obtain a seawater uranium extraction membrane assembly for engineering applications. This is to ensure that damaged or broken membrane fibers will also remain on the support rod, thereby fully ensuring that each membrane fiber deployed in the actual sea can be recovered.

[0047] Beneficial effects: (1) The membrane fibers of the prepared membrane assembly for uranium extraction from seawater for engineering applications are evenly distributed; (2) The membrane fibers of the prepared membrane assembly for uranium extraction from seawater for engineering applications can be vertically immersed in seawater, and the membrane fibers are in full contact with the seawater; (3) The marking information of the membrane assembly will not be eroded by seawater, and the label information can be seen in different directions, so the membrane assembly can be deployed in large quantities in the sea; (4) Damaged and broken membrane fibers will also remain on the support rod, fully ensuring that each membrane fiber deployed in the sea can be recovered. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 : (a) and (b) are photos of the actual sea deployment of the modified hollow fiber membrane.

[0049] Figure 2 : (a) Schematic diagram of the engineering application of seawater uranium extraction membrane assembly prepared in Example 1; (b) Photo of the actual sea deployment of the engineering application of seawater uranium extraction membrane assembly prepared in Example 1.

[0050] Figure 3 : (a) Schematic diagram of the horizontal elm wood board of Example 3; (b) Actual picture of the horizontal elm wood board of Example 3.

[0051] Figure 4 : (a) Schematic diagram of the lower membrane box used in Example 4; (b) Actual picture of the lower membrane box used in Example 4.

[0052] Figure 5 : Actual picture of Example 7 in which each area of ​​the same size of the horizontal elm board is controlled to be divided into 4 smaller areas.

[0053] Figure 6 : (a) Schematic diagram of the support rod used in Example 10; (b) Actual picture of the support rod used in Example 10. DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0055] Example 1

[0056] A membrane assembly for extracting uranium from seawater for engineering application and a preparation method thereof, comprising the following steps:

[0057] Step 1: The upper end of the membrane wire (1) is cast and fixed on the horizontal elm board (2) with epoxy resin, and the length L of the horizontal elm board (2) is controlled to be 50cm-100cm, the width W is controlled to be 10cm-30cm, and the thickness D is controlled to be 5cm-10cm. Two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length of each area (2-1) is controlled to be 10cm-35cm, the width is controlled to be 5cm-25cm, and the thickness is controlled to be 3cm-7cm;

[0058] Step 2: Open 1 to 2 through holes with a diameter of 1 cm on each of the two areas (2-1) of the same size, install 316L stainless steel rods (2-2) with a diameter of 1 cm on the through holes of the two areas (2-1) of the same size, divide each area (2-1) of the same size into 4 to 8 smaller areas to place the membrane wire (1), open a through hole with a diameter of 1 cm at 6 cm from both ends of the horizontal elm board (2), and open a through hole with a diameter of 1 cm in the middle of the horizontal elm board (2);

[0059] Step 3: The lower end of the membrane filament (1) is cast and fixed in four lower membrane boxes (3) with epoxy resin, and each lower membrane box (3) is controlled to have a length of 10 cm-35 cm, a width of 5 cm-25 cm, and a height of 3 cm-7 cm. One to two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to be divided into 2 to 12 smaller areas to place the membrane filament (1);

[0060] Step 4: The diameter of the support rod (4) is controlled to be 1 cm-2 cm. A U-shaped groove (4-1) is fixed on the upper end of the support rod (4). There is a through hole with a diameter of 1 cm on the U-shaped groove (4-1). Both sides of the U-shaped groove (4-1) are supported by 316L stainless steel rods (4-2) with a diameter of 0.6 cm. A triangular bracket (4-3) is fixed on the lower end of the support rod (4);

[0061] Step 5: The length of the vertical elm board (5) is controlled to be 50cm-100cm, the width is 10cm-30cm, and the thickness is 5cm-10cm. A through hole with a diameter of 1cm is opened at 6cm from both ends of the vertical elm board (5), and a through hole with a diameter of 1cm is opened in the middle of the vertical elm board (5);

[0062] Step 6: Connect and fix the two horizontal elm boards (2), the vertical elm boards (5) and the support rod (4) through the through holes using a 316L stainless steel rod with a diameter of 1 cm. The support rod (4) is fixed in the middle position. Lock buckles are installed on both ends of the exposed 316L stainless steel rod and fixed.

[0063] Step 7: Fix the PC board with label information printed by UV onto the horizontal elm board (2) and the vertical elm board (5);

[0064] Step 8: Use fixing ropes to fix the four lower membrane boxes (3) to the triangular bracket (4-3) at the lower end of the support rod (4), and add a counterweight to the triangular bracket (4-3) to obtain a membrane assembly for uranium extraction from seawater for engineering application;

[0065] Technical description: The schematic diagram of the membrane assembly for extracting uranium from seawater prepared in Example 1 is as follows: Figure 2 (a), in fact, the photos released by the sea are as follows Figure 2 (b) shown.

[0066] Example 2

[0067] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 1, except that: in step 1, the length L of the horizontal elm board (2) is controlled to be 50 cm, the width W is controlled to be 10 cm, and the thickness D is controlled to be 10 cm; two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length, width, and thickness of each area (2-1) are controlled to be 10 cm, 5 cm, and 5 cm.

[0068] Technical description: In this embodiment, the length, width and thickness of the horizontal elm wood board are regulated, firstly to ensure that the entire membrane assembly can be stably suspended above the sea water surface, and secondly to serve as a carrier of the label; the length, width and thickness of two areas of the same size are regulated, firstly to serve as the upper membrane box of the membrane assembly and control the fixed length of the upper end of the membrane thread and the pouring height of the epoxy resin, so as to better fix the membrane thread and prevent the membrane thread from falling off the horizontal elm wood board, and secondly to serve as a load-bearing object to ensure the strength of the entire horizontal elm wood board and ensure that the entire assembly can be stably suspended above the sea water surface.

[0069] Example 3

[0070] This embodiment is basically the same as the engineering application of a seawater uranium extraction membrane assembly and its preparation method described in Example 2, except that: in step 2, a through hole with a diameter of 1 cm is opened in each of the two regions (2-1) of the same size, a 316L stainless steel rod (2-2) with a diameter of 1 cm is installed in the through hole of the two regions (2-1) of the same size, each region (2-1) of the same size is divided into 8 smaller regions for placing membrane wires (1), a through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board (2), and a through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board (2).

[0071] Technical description: In the control step 2 of this embodiment, a through hole with a diameter of 1 cm is opened in each of the two areas of the same size, and a 316L stainless steel rod with a diameter of 1 cm is installed in the through holes of the two areas of the same size. Each area of ​​the same size is divided into 8 smaller areas to place the membrane filaments. This is to ensure that the membrane filaments can be firmly fixed on the horizontal elm board and that the membrane filaments are evenly distributed; a through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board, and a through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board. This is to ensure that the horizontal elm board, the vertical elm board and the support rod can be connected together. The schematic diagram of the horizontal elm board of this embodiment is shown in the figure. Figure 3 (a), Actual picture Figure 3 (b) shown.

[0072] Example 4

[0073] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 3, except that: in step 3, each lower membrane box (3) is controlled to have a length of 10 cm, a width of 5 cm, and a height of 7 cm, and two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to place the membrane wire (1) in 12 smaller areas.

[0074] Technical description: In the control step 3 of this embodiment, each lower membrane box has a length of 10 cm, a width of 5 cm, and a height of 7 cm to ensure that the membrane filaments are evenly distributed; two 316L stainless steel rods with a diameter of 0.6 cm are inserted into each lower membrane box to control the lower membrane box to place the membrane filaments in 12 smaller areas. First, it is to ensure that the membrane filaments can be firmly fixed on the lower membrane box and fully ensure that the membrane filaments will not fall off from the lower membrane box; second, it is to ensure that the membrane filaments are evenly distributed. The schematic diagram of the lower membrane box used in this embodiment is shown in FIG. Figure 4 (a), the actual picture is as follows Figure 4 (b) shown.

[0075] Example 5

[0076] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 4, except that: in step 4, the support rod (4) is controlled to have a diameter of 1 cm; in step 5, the vertical elm board (5) is controlled to have a length of 50 cm, a width of 10 cm, and a thickness of 5 cm.

[0077] Technical description: In the control step 4 of this embodiment, the diameter of the support rod is controlled to be 1 cm. The reasons are as follows: first, to ensure that the membrane filaments can be vertically immersed in seawater; second, to be able to carry counterweights; third, to prevent the loss of damaged or broken membrane filaments; and fourth, to connect the horizontal elm board and the four lower membrane boxes to make the membrane assembly a stable whole. In the control step 5, the length of the vertical elm board is 50 cm, the width is 10 cm, and the thickness is 5 cm. The reasons are as follows: first, to ensure the strength of the vertical elm board and the stability of the entire membrane assembly; and second, to ensure that the entire assembly can be stably suspended above the seawater surface.

[0078] Example 6

[0079] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 1, except that: in step 1, the length L of the horizontal elm board (2) is controlled to be 100 cm, the width W is controlled to be 30 cm, and the thickness D is controlled to be 10 cm, and two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length of each area (2-1) is controlled to be 35 cm, the width is controlled to be 20 cm, and the thickness is controlled to be 7 cm.

[0080] Technical description: In this embodiment, the length, width and thickness of the horizontal elm wood board are regulated, firstly to ensure that the entire membrane assembly can be stably suspended above the sea water surface, and secondly to serve as a carrier of the label; the length, width and thickness of two areas of the same size are regulated, firstly to serve as the upper membrane box of the membrane assembly to better fix the membrane filaments and prevent the membrane filaments from falling off the horizontal elm wood board, and secondly to serve as a load-bearing object to ensure the strength of the entire horizontal elm wood board and ensure that the entire assembly can be stably suspended above the sea water surface.

[0081] Example 7

[0082] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 6, except that: in step 2, a through hole with a diameter of 1 cm is opened in each of the two regions (2-1) of the same size, and a 316L stainless steel rod (2-2) with a diameter of 1 cm is installed in the through hole of the two regions (2-1) of the same size, and each region (2-1) of the same size is controlled to be divided into 4 smaller regions to place the membrane wire (1).

[0083] Technical description: In the control step 2 of this embodiment, a through hole with a diameter of 1 cm is opened in each of the two areas of the same size, and a 316L stainless steel rod with a diameter of 1 cm is installed in the through holes of the two areas of the same size. Each area of ​​the same size is controlled to be divided into 4 smaller areas to place the membrane wire, in order to ensure that the membrane wire can be firmly fixed on the horizontal elm board and to ensure that the membrane wire is evenly distributed. The actual picture of each area of ​​the horizontal elm board of this embodiment being controlled to be divided into 4 smaller areas is as follows Figure 5 shown.

[0084] Example 8

[0085] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 7, except that: in step 3, each lower membrane box (3) is controlled to have a length of 35 cm, a width of 20 cm, and a height of 7 cm, and two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to place the membrane wire (1) in 9 smaller areas.

[0086] Technical description: In the control step 3 of this embodiment, each lower membrane box is 35 cm long, 20 cm wide and 7 cm high to ensure uniform distribution of membrane filaments. Two 316L stainless steel rods with a diameter of 0.6 cm are passed through each lower membrane box to control the lower membrane box to place membrane filaments in 9 smaller areas. The first purpose is to ensure that the membrane filaments can be firmly fixed on the lower membrane box and fully ensure that the membrane filaments will not fall off from the lower membrane box; the second purpose is to ensure uniform distribution of membrane filaments.

[0087] Example 9

[0088] This embodiment is basically the same as the engineering application seawater uranium extraction membrane assembly and its preparation method described in Example 8, except that: in step 4, the support rod (4) is controlled to have a diameter of 2 cm; in step 5, the vertical elm board (5) is controlled to have a length of 100 cm, a width of 30 cm, and a thickness of 10 cm.

[0089] Technical description: In the control step 4 of this embodiment, the diameter of the support rod is controlled to be 2 cm. The first purpose is to ensure that the membrane filaments can be vertically immersed in the seawater, the second is to be able to carry counterweights, and the third is to prevent the loss of damaged or broken membrane filaments. Finally, the four lower membrane boxes are fixed to the support rod with fixed ropes and counterweights are added to ensure that the membrane filaments of the entire assembly are vertically immersed in the seawater. In the control step 5, the length of the vertical elm wood board is 100 cm, the width is 30 cm, and the thickness is 10 cm. The first purpose is to ensure the strength of the vertical elm wood board and the stability of the entire membrane assembly. The second purpose is to ensure that the entire assembly can be stably suspended above the seawater surface.

[0090] Example 10

[0091] This embodiment is basically the same as the engineering application of a seawater uranium extraction membrane component and its preparation method described in Example 1, except that: in step 1, the upper end of the membrane filament (1) is cast and fixed on the horizontal elm board (2) with epoxy resin, and the length L of the horizontal elm board (2) is controlled to be 90 cm, the width W is controlled to be 18 cm, and the thickness D is controlled to be 7 cm; two regions (2-1) of the same size are planed on the horizontal elm board (2), and the length of each region (2-1) is controlled to be 25 cm, the width is controlled to be 8 cm, and the thickness is controlled to be 4 cm; in step 2, a through hole with a diameter of 1 cm is opened on each of the two regions (2-1) of the same size, and a through hole with a diameter of 1 cm is opened in the two regions (2-1) of the same size. A 316L stainless steel rod (2-2) with a diameter of 1 cm is installed on the hole, and each area (2-1) of the same size is controlled to be divided into 6 smaller areas to place the membrane wire (1). A through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board (2), and a through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board (2); in step 3, the lower end of the membrane wire (1) is cast and fixed in four lower membrane boxes (3) with epoxy resin, and each lower membrane box (3) is controlled to have a length of 25 cm, a width of 8 cm, and a height of 5 cm. A 316L stainless steel rod (3-1) with a diameter of 0.6 cm is passed through each lower membrane box (3), and the lower membrane box (3) is controlled to be divided into 6 smaller areas are provided with membrane wires (1); in step 4, the diameter of the support rod (4) is controlled to be 1.2 cm, a U-shaped groove (4-1) is fixed at the upper end of the support rod (4), a through hole with a diameter of 1 cm is provided on the U-shaped groove (4-1), 316L stainless steel rods (4-2) with a diameter of 0.6 cm are provided on both sides of the U-shaped groove (4-1), and a triangular bracket (4-3) is fixed at the lower end of the support rod (4); in step 5, the length of the vertical elm board (5) is controlled to be 90 cm, the width is 18 cm, and the thickness is 7 cm. A through hole with a diameter of 1 cm is opened at 6 cm from both ends of the vertical elm board (5), and a through hole with a diameter of 1 cm is opened at the middle of the vertical elm board (5). 1 cm through hole; in step 6, two horizontal elm boards (2), vertical elm boards (5) and support rods (4) are connected and fixed through the through holes with 316L stainless steel rods with a diameter of 1 cm, the support rods (4) are fixed in the middle position, and lock buckles are installed at both ends of the exposed 316L stainless steel rods, and the lock buckles are fixed; in step 7, a PC board with UV printed label information is fixed on the horizontal elm board (2) and the vertical elm board (5); in step 8, four lower membrane boxes (3) are fixed on the triangular bracket (4-3) at the lower end of the support rod (4) with a fixing rope, and a counterweight is added to the triangular bracket (4-3) to obtain a seawater uranium extraction membrane assembly for engineering application.

[0092] Technical description: The control steps 1-8 of this embodiment are to prepare a seawater uranium extraction membrane assembly that can be scaled up for engineering applications. The schematic diagram of the support rod used in this embodiment is as follows Figure 6 (a), the actual picture is as follows Figure 6(b) shown.

Claims

1. A method for preparing a membrane assembly for extracting uranium from seawater for engineering applications, characterized in that: The steps include: Step 1: The upper end of the membrane wire (1) is cast and fixed on the horizontal elm board (2) with epoxy resin, and the length L of the horizontal elm board (2) is controlled to be 50cm-100cm, the width W is controlled to be 10cm-30cm, and the thickness D is controlled to be 5cm-10cm. Two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length of each area (2-1) is controlled to be 10cm-35cm, the width is controlled to be 5cm-25cm, and the thickness is controlled to be 3cm-7cm; Step 2: Open 1 to 2 through holes with a diameter of 1 cm on each of the two areas (2-1) of the same size, install 316L stainless steel rods (2-2) with a diameter of 1 cm on the through holes of the two areas (2-1) of the same size, divide each area (2-1) of the same size into 4 to 8 smaller areas to place the membrane wire (1), open a through hole with a diameter of 1 cm at 6 cm from both ends of the horizontal elm board (2), and open a through hole with a diameter of 1 cm in the middle of the horizontal elm board (2); Step 3: The lower end of the membrane filament (1) is cast and fixed in four lower membrane boxes (3) with epoxy resin, and each lower membrane box (3) is controlled to have a length of 10 cm-35 cm, a width of 5 cm-25 cm, and a height of 3 cm-7 cm. One to two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to be divided into 2 to 12 smaller areas to place the membrane filament (1); Step 4: The diameter of the support rod (4) is controlled to be 1 cm-2 cm. A U-shaped groove (4-1) is fixed on the upper end of the support rod (4). There is a through hole with a diameter of 1 cm on the U-shaped groove (4-1). Both sides of the U-shaped groove (4-1) are supported by 316L stainless steel rods (4-2) with a diameter of 0.6 cm. A triangular bracket (4-3) is fixed on the lower end of the support rod (4); Step 5: The length of the vertical elm board (5) is controlled to be 50cm-100cm, the width is 10cm-30cm, and the thickness is 5cm-10cm. A through hole with a diameter of 1cm is opened at 6cm from both ends of the vertical elm board (5), and a through hole with a diameter of 1cm is opened in the middle of the vertical elm board (5); Step 6: Connect and fix the two horizontal elm boards (2), the vertical elm boards (5) and the support rod (4) through the through holes using a 316L stainless steel rod with a diameter of 1 cm. The support rod (4) is fixed in the middle position. Lock buckles are installed on both ends of the exposed 316L stainless steel rod and fixed. Step 7: Fix the PC board with label information printed by UV onto the horizontal elm board (2) and the vertical elm board (5); Step 8: Use fixing ropes to fix the four lower membrane boxes (3) to the triangular bracket (4-3) at the lower end of the support rod (4), and add a counterweight to the triangular bracket (4-3) to obtain a membrane assembly for uranium extraction from seawater for engineering application.

2. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 1, characterized in that: In step 1, the length L of the horizontal elm board (2) is controlled to be 50 cm, the width W is controlled to be 10 cm, and the thickness D is controlled to be 10 cm. Two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length of each area (2-1) is controlled to be 10 cm, the width is controlled to be 5 cm, and the thickness is controlled to be 5 cm.

3. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 2, characterized in that: In step 2, a through hole with a diameter of 1 cm is respectively opened on the two areas (2-1) of the same size, and a 316L stainless steel rod (2-2) with a diameter of 1 cm is installed in the through holes of the two areas (2-1) of the same size. Each area (2-1) of the same size is divided into 8 smaller areas to place the membrane wire (1), and a through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board (2), and a through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board (2).

4. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 3, characterized in that: In step 3, each lower membrane box (3) is controlled to have a length of 10 cm, a width of 5 cm, and a height of 7 cm. Two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to place the membrane wire (1) in 12 smaller areas.

5. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 4, characterized in that: In step 4, the diameter of the support rod (4) is controlled to be 1 cm; in step 5, the length of the vertical elm board (5) is controlled to be 50 cm, the width is 10 cm, and the thickness is 5 cm.

6. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 1, characterized in that: In step 1, the length L of the horizontal elm board (2) is controlled to be 100 cm, the width W is controlled to be 30 cm, and the thickness D is controlled to be 10 cm. Two areas (2-1) of the same size are planed on the horizontal elm board (2), and the length of each area (2-1) is controlled to be 35 cm, the width is controlled to be 20 cm, and the thickness is controlled to be 7 cm.

7. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 6, characterized in that: In step 2, a through hole with a diameter of 1 cm is opened in each of the two regions (2-1) of the same size, and a 316L stainless steel rod (2-2) with a diameter of 1 cm is installed in the through hole of the two regions (2-1) of the same size. Each region (2-1) of the same size is divided into four smaller regions to place the membrane wire (1).

8. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 7, characterized in that: In step 3, each lower membrane box (3) is controlled to have a length of 35 cm, a width of 20 cm, and a height of 7 cm. Two 316L stainless steel rods (3-1) with a diameter of 0.6 cm are passed through each lower membrane box (3), and the lower membrane box (3) is controlled to be divided into 9 smaller areas to place the membrane wire (1).

9. The method for preparing a membrane assembly for extracting uranium from seawater for engineering application as claimed in claim 8, characterized in that: In step 4, the diameter of the support rod (4) is controlled to be 2 cm; in step 5, the length of the vertical elm board (5) is controlled to be 100 cm, the width is 30 cm, and the thickness is 10 cm.

10. The method for preparing a membrane assembly for extracting uranium from seawater for engineering applications as claimed in claim 1, characterized in that: In step 1, the upper end of the membrane filament (1) is cast and fixed on the horizontal elm board (2) with epoxy resin, and the length L, width W and thickness D of the horizontal elm board (2) are controlled to be 90 cm, 18 cm and 7 cm, and two regions (2-1) of the same size are planed on the horizontal elm board (2), and the length, width and thickness of each region (2-1) are controlled to be 25 cm, 8 cm and 4 cm; in step 2, a through hole with a diameter of 1 cm is opened on each of the two regions (2-1) of the same size, and a 316L stainless steel rod (2-2) with a diameter of 1 cm is installed in the through holes of the two regions (2-1) of the same size, and each region of the same size is The membrane thread (1) is placed in the domain (2-1) in 6 smaller areas, and a through hole with a diameter of 1 cm is opened at 6 cm from both ends of the horizontal elm board (2), and a through hole with a diameter of 1 cm is opened in the middle of the horizontal elm board (2); in step 3, the lower end of the membrane thread (1) is cast and fixed in four lower membrane boxes (3) with epoxy resin, and each lower membrane box (3) is controlled to have a length of 25 cm, a width of 8 cm, and a height of 5 cm. A 316L stainless steel rod (3-1) with a diameter of 0.6 cm is passed through each lower membrane box (3), and the membrane thread (1) is placed in the lower membrane box (3) in 6 smaller areas; in step 4, the support rod (4 ) is controlled to have a diameter of 1.2 cm, a U-shaped groove (4-1) is fixed on the upper end of the support rod (4), a through hole with a diameter of 1 cm is provided on the U-shaped groove (4-1), 316L stainless steel rods (4-2) with a diameter of 0.6 cm are provided on both sides of the U-shaped groove (4-1), and a triangular bracket (4-3) is fixed on the lower end of the support rod (4); in step 5, the vertical elm board (5) is controlled to have a length of 90 cm, a width of 18 cm, and a thickness of 7 cm, and a through hole with a diameter of 1 cm is opened at 6 cm from both ends of the vertical elm board (5), and a through hole with a diameter of 1 cm is opened at the middle of the vertical elm board (5); step 6 In step 7, a PC board with UV-printed label information is fixed to the horizontal elm board (2) and the vertical elm board (5) and the support rod (4) by using a 316L stainless steel rod with a diameter of 1 cm through the through hole. The support rod (4) is fixed in the middle position, and locking buckles are installed at both ends of the exposed 316L stainless steel rod and fixed. In step 8, four lower membrane boxes (3) are fixed to the triangular bracket (4-3) at the lower end of the support rod (4) by using a fixing rope, and a counterweight is added to the triangular bracket (4-3) to obtain a membrane assembly for uranium extraction from seawater for engineering application.

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