An adsorption tower

Abstract

The present invention relates to the technical field of adsorption towers, and provides an adsorption tower comprising at least: a main body having a hollow tower cavity, the tower cavity having a water inlet and a water outlet; adsorption dishes arranged in the tower cavity at intervals along the height direction of the main body, each adsorption dish being filled with an adsorbent; a first water-permeable structure arranged in the tower cavity and between two adjacent layers of adsorption dishes, the first water-permeable structure having a water-permeable state allowing water to pass through, and a water-isolating state restricting water from passing through. The adsorption tower provided by the present invention has a plurality of adsorption dishes arranged in the tower cavity at intervals, and the first water-permeable structure can separate the adsorption dishes, so that the adsorption tower has different combination modes of independent adsorption of a single dish and adsorption of multiple dishes in series, which ensures a sufficient adsorption scale effect as a whole, and also ensures that the adsorbed brine can maintain as high an operating efficiency as possible under various conditions such as different lithium concentrations, different temperatures, and different flow rate conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of adsorption towers, in particular to an adsorption tower. Background Art

[0002] Existing adsorption towers are generally large, often several meters high. When using manganese and titanium adsorbents with high adsorption speed and efficiency, regardless of whether the brine enters or exits from the top or bottom, during most of the adsorption process, the adsorbent in the adsorption tower is either in a state of being saturated and unable to adsorb any more, or in a state of not being saturated but the brine it contacts contains almost no lithium, resulting in low efficiency of the entire adsorption process. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that the existing adsorption tower easily leads to low efficiency of the entire adsorption process, and thus an adsorption tower is provided.

[0004] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0005] An adsorption tower comprises at least: a main body having a hollow tower cavity, the tower cavity having a water inlet and a water outlet; adsorption dishes arranged in the tower cavity at intervals along the height direction of the main body, each of the adsorption dishes being filled with an adsorbent; a first water-permeable structure arranged in the tower cavity and located between two adjacent layers of the adsorption dishes, the first water-permeable structure having a water-permeable state allowing water to pass through, and a water-isolating state restricting water from passing through.

[0006] Furthermore, the first water-permeable structure includes a first partition and a second partition arranged in a stacked manner, and a plurality of water-permeable holes are provided on the plate surfaces of the first partition and the second partition; the first partition can rotate around its own axis so that the water-permeable holes on the first partition and the water-permeable holes on the second partition overlap with each other or are staggered with each other.

[0007] Furthermore, the first partition and the second partition are both inclined relative to the horizontal plane so that the lowest liquid level point and the highest liquid level point are formed between the two adjacent first permeable structures; a liquid inlet and a liquid drain port are provided at each of the lowest liquid level points, and a liquid drain port is provided at each of the highest liquid level points.

[0008] Furthermore, the adsorption dish is a columnar structure, a first filter is provided on the top surface of the adsorption dish, and a second filter is provided on the bottom surface of the adsorption dish; the first filter and the second filter are suitable for limiting leakage of the adsorbent in the adsorption dish.

[0009] Furthermore, the adsorption tower also includes a second permeable structure, which is arranged on the bottom surface of the adsorption dish and located on the side of the second filter screen facing away from the first filter screen. The second permeable structure has a permeable state that allows water to pass through, and a water-proof state that restricts water from passing through.

[0010] Furthermore, a preset interval is left between the second water-permeable structure and the second filter screen, and the preset interval ranges from 1 mm to 2 mm.

[0011] Furthermore, a ring-shaped member is provided on the bottom surface of the adsorption dish, and a forklift moves the adsorption dish via the ring-shaped member.

[0012] Furthermore, the edges of the top and bottom surfaces of the adsorption dish are both provided with extensions, which extend in a direction away from the center of the adsorption dish, and are suitable for fixing the adsorption dish in the tower cavity through the extensions.

[0013] Furthermore, a door body is provided on the side wall of the tower cavity, which is suitable for taking out the adsorption dish in the tower cavity through the door body.

[0014] Furthermore, the bottom of the main body is a conical structure, and the water inlet and the water outlet are both located on the side wall of the conical structure.

[0015] The technical solution of the present invention has the following advantages:

[0016] The adsorption tower provided by the present invention has multiple adsorption dishes arranged at intervals in the tower cavity, and the first water-permeable structure can separate the various adsorption dishes, so that the adsorption tower has different combination modes of independent adsorption of a single dish and adsorption of multiple dishes in series, which ensures sufficient adsorption scale effect as a whole and ensures that the adsorbed brine can maintain as high an operating efficiency as possible under various conditions such as different lithium concentrations, different temperatures, and different flow rate conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of an adsorption tower in an embodiment of the present invention;

[0019] Figure 2 Schematic diagram of an adsorption dish in an adsorption tower in an embodiment of the present invention;

[0020] Figure 3Schematic diagram of an insert ring in an adsorption tower in an embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the first partition plate in the adsorption tower in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the local structure at the lowest point of the liquid level formed by the first water permeable structure in the adsorption tower in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the local structure at the highest point of the liquid level formed by the first water permeable structure in the adsorption tower in an embodiment of the present invention.

[0024] 1. Main body; 2. Door; 3. First water-permeable structure;

[0025] 4. Adsorption dish; 5. Extension; 6. First partition;

[0026] 7. Water permeable hole; 8. First filter screen; 9. Second filter screen;

[0027] 10. Second water-permeable structure; 11. Insert ring; 12. Liquid inlet;

[0028] 13. Liquid drain port; 14. Liquid level gauge; 15. Thermometer;

[0029] 16. pH meter. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Figure 1 Schematic diagram of an adsorption tower in an embodiment of the present invention; Figure 2 Schematic diagram of an adsorption dish in an adsorption tower in an embodiment of the present invention; Figure 1 and Figure 2 As shown, this embodiment provides an adsorption tower, which at least includes: a main body 1, having a hollow tower cavity, the tower cavity having a water inlet and a water outlet; adsorption dishes 4, which are arranged in the tower cavity at intervals along the height direction of the main body 1, and each adsorption dish 4 is filled with an adsorbent; a first permeable structure 3, which is arranged in the tower cavity and located between two adjacent layers of adsorption dishes 4, and the first permeable structure 3 has a permeable state that allows water to pass through, and a water-proof state that restricts the passage of water.

[0035] The adsorption tower provided in this embodiment has multiple adsorption dishes 4 arranged at intervals in the tower cavity, and the first permeable structure 3 can separate the various adsorption dishes 4, so that the adsorption tower has different combination modes of independent adsorption of a single dish and adsorption of multiple dishes in series, which ensures sufficient adsorption scale effect as a whole and ensures that the adsorbed brine can maintain as high an operating efficiency as possible under various conditions such as different lithium concentrations, different temperatures, and different flow rates.

[0036] Figure 4 Schematic diagram of the first partition plate in the adsorption tower in an embodiment of the present invention; Figure 4 As shown, the first permeable structure 3 includes a first partition plate 6 and a second partition plate arranged in a stacked manner, and a plurality of permeable holes 7 are provided on the plate surfaces of the first partition plate 6 and the second partition plate; the first partition plate 6 can rotate around its own axis so that the permeable holes 7 on the first partition plate 6 and the permeable holes 7 on the second partition plate overlap with each other or are staggered with each other.

[0037] Among them, the first partition 6 and the second partition are both inclined relative to the horizontal plane to form the lowest liquid level point and the highest liquid level point between the two adjacent first permeable structures 3; a liquid inlet 12 and a liquid drain port 13 are provided at each lowest liquid level point, and a liquid drain port 13 is provided at each highest liquid level point.

[0038] Figure 3 Schematic diagram of the insert ring in the adsorption tower in the embodiment of the present invention; Figure 3 As shown, the adsorption dish 4 is a columnar structure, the top surface of the adsorption dish 4 is provided with a first filter 8, and the bottom surface of the adsorption dish 4 is provided with a second filter 9; the first filter 8 and the second filter 9 are suitable for limiting the leakage of the adsorbent in the adsorption dish 4.

[0039] The adsorption tower further includes a second permeable structure 10, which is arranged on the bottom surface of the adsorption dish 4 and located on the side of the second filter screen 9 facing away from the first filter screen 8. The second permeable structure 10 has a permeable state that allows water to pass through, and a water-proof state that restricts the passage of water.

[0040] There is a preset gap between the second water-permeable structure 10 and the second filter screen 9, and the preset gap ranges from 1 mm to 2 mm.

[0041] The bottom surface of the adsorption dish 4 is provided with an annular member, and the forklift moves the adsorption dish 4 via the annular member.

[0042] The edges of the top and bottom surfaces of the adsorption dish 4 are both provided with extensions 5 , which extend away from the center of the adsorption dish 4 and are suitable for fixing the adsorption dish 4 in the tower cavity through the extensions 5 .

[0043] A door body 2 is provided on the side wall of the tower cavity, which is suitable for taking out the adsorption dish 4 in the tower cavity through the door body 2.

[0044] The bottom of the main body 1 is a conical structure, and the water inlet and the water outlet are both located on the side wall of the conical structure.

[0045] Specifically, for example, the main body 1 may be made of stainless steel or carbon steel, the inner lining may be made of acid and alkali resistant material, and the outer surface of the main body 1 may be sprayed with a coating resistant to high salt vapor corrosion.

[0046] For example, the adsorption column may be a cylindrical structure, the diameter of the main body 1 may be in the range of 0.1m-10m, and the height may be in the range of 0.5m-20m.

[0047] For example, the interior of the main body 1 can be divided into 2 to 50 layers, and each layer is provided with an adsorption dish 4 loaded with an adsorbent.

[0048] For example, a rectangular door 2 can be provided on each layer of the outer wall of one side of the main body 1. When the door 2 is opened, it is used to load the adsorption dish 4. After the adsorption dish 4 is loaded, the door 2 is closed and the barrel wall of the adsorption tower is sealed.

[0049] For example, except for the bottom layer of the adsorption column, each layer has a consistent structure. The AB plane can be provided with a structural member for fixing the adsorption dish 4. For example, the structural member can be a rotating clip provided on the inner wall of the tower cavity, or an annular protrusion can be provided on the inner wall of the tower cavity to fix the adsorption dish 4 in the tower cavity. Once installed, the adsorption dish 4 cannot move vertically or swing left and right within the tower cavity, which is beneficial to improving the adsorption effect.

[0050] The first permeable structure 3 can be arranged at the CD plane in the tower cavity. The angle between the first partition 6 and the second partition and the horizontal plane can be 1°-45°. Preferably, the angle range is 1°-10°. Such an arrangement is beneficial to the liquid flow distribution and can facilitate the discharge or pumping of liquid.

[0051] For example, both the first partition 6 and the second partition can be made of a thin circular plate with multiple circular water-permeable holes 7. When the first partition 6 and the second partition are completely overlapped, water can flow through quickly, and after rotating 1° to 30°, they can be completely water-proof. The first partition 6 and the second partition can both be made of materials such as stainless steel or polytetrafluoroethylene, and can be fastened to each other at the black solid hole in the center of the circle by a snap. For example, the first partition 6 is on the upper layer and the second partition is on the lower layer. Then, a magnet can be set every 60° on the rotatable circumference of the first partition 6, and an electromagnet can be set every 60° at the corresponding position on the inner wall of the tower cavity. When the six electromagnets are energized at the same time, they can attract the magnets on the entire first partition 6. Then, the first partition 6 will rotate clockwise or counterclockwise by an angle with the center as the axis, so that the water-permeable holes 7 on the first partition 6 and the second partition overlap or stagger, realizing the switching between the water-permeable state and the water-proof state. For example, a spring connected between the first partition plate 6 and the second partition plate can be used to reset the first partition plate 6 and the second partition plate when the electromagnet is powered off.

[0052] Figure 5 Schematic diagram of the local structure at the lowest point of the liquid level formed by the first water permeable structure in the adsorption tower in an embodiment of the present invention; Figure 5 For example, position C is the lowest point of the liquid level in the upper layer after the first permeable structure 3 is water-blocked. This position is provided with a liquid inlet 12 and a liquid outlet 13, which can be connected to the corresponding pump body via pipelines. Position D is the highest point of the liquid level in the lower layer after the first permeable structure 3 is water-blocked. This position is provided with a liquid outlet 13, which can be connected to the corresponding pump body via pipelines.

[0053] Figure 6 FIG. 1 is a schematic diagram of a local structure at the highest point of the liquid level formed by the first water permeable structure in the adsorption tower in an embodiment of the present invention, as shown in FIG. Figure 6As shown, for example, a liquid level meter 14, a thermometer 15, a pH meter 16 and a conductivity meter can be set on the inner wall of the tower cavity near the D position to collect corresponding data. The collected data can be read directly from the outside of the main body 1, and the collected corresponding data can also be sent to the central control system.

[0054] The bottom of the adsorption column is a conical structure with a water inlet and a water outlet, which can be connected to the corresponding pump body through pipelines respectively.

[0055] For example, the adsorption dish 4 can be made of materials such as stainless steel or polytetrafluoroethylene, which are acid and alkali resistant. The height of the adsorption dish 4 can range from 0.05m to 3m. The width of the extension 5 surrounding the upper and lower circular surfaces of the adsorption dish 4 can range from 0.5cm to 5cm, and the thickness can range from 1mm to 20mm. This configuration not only facilitates the fixing of the adsorption dish 4, ensuring that it remains horizontal after fixing, but also provides a certain water barrier, ensuring that all water from above and below passes through the center of the adsorption dish 4, allowing the water to fully contact the adsorbent within the adsorption dish 4.

[0056] For example, the upper surface of the adsorption dish 4 is covered with a removable first filter screen 8. After the adsorption dish 4 is loaded with the adsorbent, the first filter screen 8 is fastened to prevent the adsorbent from overflowing upward from the adsorption dish 4. The lower surface of the adsorption dish 4 has three layers. From top to bottom, the first layer is a second filter screen 9 similar to the upper surface, which can be welded or bonded to the adsorption dish 4 to prevent the adsorbent from overflowing downward. Below the second filter screen 9 is the second layer, which is a second water-permeable structure 10. The second water-permeable structure 10 can be the same as the first water-permeable structure 3 and is also two thin plates. Normally, they are in a water-permeable state to facilitate the water permeation of the adsorbent. Only when the adsorbent is taken out, they are rotated to a water-proof state to facilitate the adsorbent to be sucked out / poured out together with the water. Below the second water-permeable structure 10 is the third layer, which is an insert ring 11. The insert ring 11 can be welded to the bottom of the adsorption dish 4 and is used for fixing and limiting when the forklift lifts the adsorption dish 4 and loads the adsorption dish 4 into the adsorption tower. For example, the insert rings 11 may also be two hollow rectangular cylinders that match the outer shape of the adsorption dish 4 to ensure that the adsorption dish does not move in the horizontal direction when placed in the tower cavity.

[0057] For example, the spacing between the second filter screen 9 and the second permeable structure 10 is generally small but necessary, for example, 1 mm to 2 mm. Regarding the second permeable structure 10, the radius of the upper first baffle 6 can be slightly smaller than the inner diameter of the adsorption dish 4, allowing it to rotate within the adsorption dish 4. The lower second baffle can be securely connected to the lower surface of the adsorption dish 4 by welding, snapping, or other means, and can be flush with the lower surface of the adsorption dish 4. The connection between the second baffle and the adsorption dish 4 can be sealed.

[0058] During use, several pumps and acid tanks can be connected externally according to the design requirements of the adsorption tower to meet the needs of liquid inlet and outlet, liquid storage, etc. during the adsorption and desorption process.

[0059] The specific process is as follows:

[0060] Adsorbent unloading / loading:

[0061] To unload the adsorbent, first adjust all first permeable structures 3 to a permeable state and drain the water from the adsorption tower through the drain port at F. Open the door 2 on the outer wall of the lowest or highest adsorption tower and use a forklift to remove the adsorption dishes 4 on that layer. Continue this process layer by layer until all adsorption dishes 4 are removed. Open the first filter screens 8 above all adsorption dishes 4 and adjust the first permeable structures 3 below the adsorption dishes 4 to a water-tight state. After filling each adsorption dish 4 with water, use a pump to suck out / pour out all the adsorbent. Because there is a layer of water between the second filter screen 9 and the second permeable structure 10 below the adsorption dish 4, the adsorbent can be easily sucked out / poured out without sticking to the second filter screen 9. To refill the adsorbent, adjust the second permeable structure 10 below the adsorption dish 4 to a permeable state, pump in the specified amount of new adsorbent, and then replace the first filter screen 8 above the adsorption dish 4. After all the adsorption dishes 4 are loaded with new adsorbent, they are loaded one by one into the adsorption tower using a forklift, and then all the doors 2 on the outer wall of the main body 1 are closed, and the adsorbent loading is completed.

[0062] Adsorption and desorption:

[0063] Due to the strong adsorption capacity and rapid adsorption rate of the lithium ion sieve adsorbent, a single cycle can simultaneously utilize one, two, three, or even multiple layers of adsorption dishes 4 to adsorb the same portion of brine, depending on the lithium concentration and pH of the brine being adsorbed. When a single cycle utilizes only one layer of adsorption dishes 4, the first permeable structure 3 beneath each layer of adsorption dishes 4 is adjusted to a water-tight state. The liquid inlet 12 above position C is opened and connected to the brine tank, and the liquid outlet 13 below position D is opened and connected to the adsorption tail liquid tank. Each layer of adsorption dishes 4 undergoes independent adsorption. When a single cycle utilizes two layers of adsorption dishes 4, each adjacent pair of adsorption dishes 4 from the bottom of the adsorption tower constitutes a unit. The first permeable structure 3 within a unit is adjusted to a water-tight state, and the first permeable structure 3 between units is adjusted to a water-tight state. The liquid inlet 12 above position C in the lower unit is opened and connected to the brine tank, and the liquid outlet 13 below position D in the upper unit is opened and connected to the adsorption tail liquid tank. The same applies to the method of utilizing three or more layers of adsorption dishes 4 in a single cycle.

[0064] During water washing, all first permeable structures 3 are adjusted to a permeable state to allow water to flow through as much adsorbent as possible, thereby saving water. After washing, the drain port at F can be opened to drain the wash water from the adsorption column, increasing the lithium concentration in the desorption solution and reducing the concentration of impurity ions.

[0065] During desorption, the first permeable structure 3 between each layer is adjusted to a water-proof state, the liquid inlet 12 at position C is connected to the acid tank through a pump body, and the discharge port 13 at position D is also connected back to the same acid tank to achieve cyclic desorption. After desorption is completed, the lithium concentration of the desorption liquid can be obtained in real time through a machine learning method that monitors the lithium concentration of the desorption liquid online. If the lithium concentration of the desorption liquid fails to meet the requirements of the subsequent process design, for example, the subsequent process design requires a lithium concentration greater than or equal to 2000ppm, and the real-time lithium concentration of the desorption liquid is only 1500ppm, the discharge port 13 at position C can be opened and connected to another acid tank through a pump body. After the desorption liquid is pumped to the other acid tank, an appropriate amount of concentrated acid is added to the acid tank and thoroughly mixed. The acid tank is then connected to the adsorption dish layer 4 that has not yet been desorbed for desorption. After confirming that the lithium ion concentration of the desorption liquid meets the requirements, all of this part of the desorption liquid is pumped into the desorption tank. After allocating all adsorption dishes 4 according to the above process, as much desorption liquid as possible that meets the requirements can be obtained in the shortest time, while the excess acid flowing through each part of the adsorbent is minimal, thereby significantly reducing the dissolution loss caused by acid leaching.

[0066] Example 1:

[0067] The adsorption tower has a diameter of 1.6 meters, the adsorption dish is 30 cm high, there are 6 layers in total, the adsorption tower is 3 meters high, and the adsorbent is loaded in a total of 3 cubic meters.

[0068] Unloading the old adsorbent and loading the new adsorbent required 2 people, a forklift, and a pump body. It took 0.8 hours to unload the old adsorbent and 1.5 hours to load the new adsorbent, for a total of 2.3 hours.

[0069] Comparative Example 1:

[0070] The adsorption tower has a diameter of 1.6 meters and a height of 3.5 meters, and is loaded with a total of 3 cubic meters of the same adsorbent.

[0071] Unloading the old adsorbent and loading the new adsorbent required 3 people, a forklift, and a pump body. It took 3.5 hours to unload the old adsorbent and 4 hours to load the new adsorbent, for a total of 7.5 hours.

[0072] Example 2:

[0073] The adsorption tower has a diameter of 1.6 meters, a height of 30 cm, and a total of six layers. The tower is 3 meters tall and holds a total of 3 cubic meters of adsorbent. A single cycle adsorbed 240 cubic meters of brine from a salt lake. Three layers were used as a unit for adsorption. The adsorption and desorption process took four hours, resulting in a lithium ion recovery rate of 95%, a lithium ion concentration of 2 g / L in the desorbed solution, and a manganese loss of 0.007%.

[0074] Comparative Example 2:

[0075] The adsorption tower, 1.6 meters in diameter and 3.5 meters in height, was loaded with 3 cubic meters of the same adsorbent. A single cycle adsorbed 240 cubic meters of brine from the same salt lake. The adsorption and desorption process took 5 hours, resulting in a 90% lithium ion recovery rate, a lithium ion concentration of 1.4 g / L in the desorbed solution, and a manganese loss of 0.03%.

[0076] Example 3:

[0077] The adsorption tower has a diameter of 1.6 meters, and the adsorption dishes are 30 cm high. The tower is 3 meters tall, with a total of 6 layers and a loading capacity of 3 cubic meters of adsorbent. A single cycle of adsorption was performed on 60 cubic meters of brine from a salt lake. Each layer was considered a unit during adsorption. The total adsorption and desorption time was 2 hours, with a lithium ion recovery rate of 93%, a lithium ion concentration of 2 g / L in the desorbed solution, and a manganese dissolution loss of 0.012%.

[0078] Comparative Example 3:

[0079] The adsorption tower, 1.6 meters in diameter and 3.5 meters in height, was loaded with 3 cubic meters of the same adsorbent. A single cycle adsorbed 60 cubic meters of brine from the same salt lake. The adsorption and desorption process took 4 hours, resulting in an 89% lithium ion recovery rate, a 1.5g / L lithium ion concentration in the desorbed solution, and a 0.035% manganese loss.

[0080] In summary, the adsorption tower in the present application, on the one hand, ensures sufficient scale effect in the overall adsorption scale, and on the other hand, fully considers the relative relationship between the diffusion rate of brine inside the lithium ion sieve particles and the external flow rate of manganese / titanium adsorbents at conventional flow rates, forming an adsorption dish that ensures the continuous and efficient operation of the lithium ion sieve. At the same time, through different combinations of independent adsorption of a single dish and adsorption of multiple dishes in series, it ensures that the adsorbed brine can maintain as high an operating efficiency as possible under various conditions such as different lithium concentrations, different temperatures, and different flow rate conditions.

[0081] The adsorption tower in the present application solves the problem of difficulty in loading and disassembling the adsorbent; improves the utilization efficiency of the adsorbent; reduces the dissolution loss of the adsorbent; solves the problem of standardization of the adsorption tower design, and the same design of adsorption tower can be used for brines with different lithium concentrations; solves the problem of stability of the lithium concentration of the desorption liquid of the adsorption tower, and the lithium concentration of the desorption liquid can be adjusted according to demand.

[0082] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An adsorption tower, characterized in that: At least: The main body has a hollow tower cavity, and the tower cavity has a water inlet and a water outlet; Adsorption dishes are arranged in the tower cavity at intervals along the height direction of the main body, and each of the adsorption dishes is filled with an adsorbent; a first water-permeable structure disposed in the tower cavity and between two upper and lower adjacent layers of the adsorption dishes, the first water-permeable structure having a water-permeable state allowing water to pass through and a water-isolating state restricting water from passing through; The adsorption dish is a columnar structure, the top surface of the adsorption dish is provided with a first filter screen, and the bottom surface of the adsorption dish is provided with a second filter screen; The first filter screen and the second filter screen are suitable for limiting leakage of the adsorbent in the adsorption dish; It also includes a second water-permeable structure, which is arranged on the bottom surface of the adsorption dish and is located on the side of the second filter screen facing away from the first filter screen, and the second water-permeable structure has a water-permeable state that allows water to pass through, and a water-blocking state that restricts water from passing through; A preset gap is left between the second water-permeable structure and the second filter screen; The bottom surface of the adsorption dish is provided with an annular member, and a forklift moves the adsorption dish via the annular member; A door is provided on the side wall of the tower cavity, suitable for taking out the adsorption dish in the tower cavity through the door; The first water-permeable structure includes a first partition plate and a second partition plate that are stacked, and a plurality of water-permeable holes are provided on the plate surfaces of the first partition plate and the second partition plate; The first partition can rotate around its own axis so that the water holes on the first partition and the water holes on the second partition overlap or stagger with each other; The first partition plate and the second partition plate are both inclined relative to the horizontal plane so that the lowest point and the highest point of the liquid level are formed between two adjacent first permeable structures; A liquid inlet and a liquid discharge port are provided at each of the lowest points of the liquid level, and a liquid discharge port is provided at each of the highest points of the liquid level; The second water-permeable structure is the same as the first water-permeable structure; The radius of the first partition of the second water-permeable structure is slightly smaller than the inner diameter of the adsorption dish, so that it can rotate in the adsorption dish. The second partition of the second water-permeable structure is firmly connected to the lower surface of the adsorption dish by welding or snapping and is flush with the lower surface of the adsorption dish, and the connection between the second partition of the second water-permeable structure and the adsorption dish is sealed.

2. The adsorption tower according to claim 1, characterized in that The preset interval ranges from 1 mm to 2 mm.

3. The adsorption tower according to claim 1, characterized in that Edges of the top and bottom surfaces of the adsorption dish are both provided with extensions, which extend in a direction away from the center of the adsorption dish and are suitable for fixing the adsorption dish in the tower cavity through the extensions.

4. The adsorption tower according to claim 1, characterized in that The bottom of the main body is a conical structure, and the water inlet and the water outlet are both located on the side wall of the conical structure.

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