Superfine adsorbent powder countercurrent adsorption and desorption device

Abstract

The utility model discloses a superfine adsorbent powder countercurrent adsorption and desorption device which comprises multiple stages of stirring and thickening combined mechanisms, each stage of stirring and thickening combined mechanism comprises a stirring tank and a thickener, the upper part of each stirring tank is provided with an overflow port, the upper part of each thickener is provided with a thickening overflow port, and the bottom of each thickener is provided with a thickening underflow port; in each stage of stirring and thickening combination mechanism, an overflow port of the stirring tank is communicated with the thickener, a thickening overflow port of the thickener is communicated with the stirring tank of the next stage of stirring and thickening combination mechanism, and a thickening underflow port of the thickener is communicated with the stirring tank of the current stage of stirring and thickening combination mechanism and / or the stirring tank of the previous stage of stirring and thickening combination mechanism. According to the utility model, the reverse flow and separation of the powder adsorbent and the brine or the desorption agent can be realized, so that the adsorption and desorption process by directly utilizing the powder adsorbent is easy to regulate and control, the operability is strong, and the powder adsorbent can be directly adsorbed or desorbed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a superfine powder solid-liquid separation device, concretely relates to a superfine adsorbent powder countercurrent adsorption and desorption device. BACKGROUND

[0002] Lithium resources are mainly stored in hard rocks and salt lake brine, wherein the lithium reserves of "salt lake type" account for more than 70%, and the lithium resources in salt lake brine account for 87% of the total reserves in China. Therefore, the development of lithium resources in salt lake brine is of great significance to the sustainable development of the lithium industry.

[0003] Currently, there are solvent extraction, precipitation, calcination, membrane separation and adsorption methods for extracting lithium from salt lakes, but each has its own advantages and disadvantages. Considering production investment, use cost, environmental factors and other aspects, the adsorption method is a relatively green method for extracting lithium, and the process is simple, the recovery rate is high, and the environmental side effects are small. The core of the adsorption method for extracting lithium is the adsorbent, and the use of lithium extraction adsorbent is also closely related to the adsorption equipment. Currently, the adsorption equipment includes rotary disc continuous ion exchange, valve array type simulated moving bed or fixed bed, and belt filter, among which continuous ion exchange, simulated moving bed and fixed bed are mainly used for adsorbent products after granulation. However, after the adsorbent powder is granulated, the adsorption capacity is only 1 / 5 of the original, which seriously affects the use effect of the adsorbent and increases the initial investment of equipment and adsorbent. In addition, the ion sieve type adsorbent desorption process also has the problem of solution loss and structure damage caused by excessive desorption of part of the adsorbent. Although powder adsorbent has the advantages of fast adsorption rate, large adsorption capacity and small adsorbent dosage, due to the fine particle size of the powder, which is only 10-20 um, there are problems such as difficulty in separation, poor operability, and difficulty in controlling the adsorption and desorption process, which affect its industrial application. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model aims to provide a superfine adsorbent powder countercurrent adsorption and desorption device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A superfine adsorbent powder countercurrent adsorption and desorption device, comprising a multi-stage stirring and thickening combined mechanism, each stirring and thickening combined mechanism comprising a stirring tank and a thickener, the upper part of the stirring tank being provided with an overflow port, the upper part of the thickener having a thickening overflow port and the bottom of the thickener having a thickening underflow port; in each stirring and thickening combined mechanism, the overflow port of the stirring tank is in communication with the thickener, the thickening overflow port of the thickener is in communication with the stirring tank of the next stage stirring and thickening combined mechanism, and the thickening underflow port of the thickener is in communication with the stirring tank of the current stage stirring and thickening combined mechanism and / or the stirring tank of the previous stage stirring and thickening combined mechanism.

[0007] Further, the thickener overflow port of the thickener of the last-stage stirring and thickening combined mechanism is communicated with the storage tank.

[0008] Further, the stirring tank is in a cylindrical shape, and a top of the stirring tank is provided with an injection port, the injection port being used for connecting the thickener overflow port of the thickener of the upper-stage stirring and thickening combined mechanism and / or the thickener underflow port of the thickener of the current-stage stirring and thickening combined mechanism; the stirring tank is provided with a stirring motor and a stirring paddle, the stirring paddle being located in the interior of the stirring tank, and the stirring motor being used for driving the stirring paddle to rotate axially.

[0009] Further, the upper part of the thickener is in a cylindrical shape, and the lower part of the thickener is in an inverted conical shape, and the thickener underflow port is located at the bottom end of the lower part in the inverted conical shape.

[0010] Further, the thickener is provided with a stirrer and a stirrer driving device, a lower end of the stirrer extending into the bottom of the thickener; the stirrer driving device is fixed on the bridge frame of the thickener, and is drivingly connected to the stirrer through a transmission shaft.

[0011] Further, a lower end of the stirrer is provided with a triangular scraper.

[0012] Further, the thickener further comprises a feeding pipe and a feeding bin; the feeding bin is located in the interior of the thickener, is in a hollow cylindrical shape, and is located in the middle of the upper part of the thickener; the top and the bottom of the feeding bin are in an open structure, and the feeding bin corresponds to the middle position of the bottom of the thickener; the feeding pipe is arranged on the bridge frame of the thickener, and two ends of the feeding pipe are respectively communicated with the overflow port of the stirring tank and the interior of the feeding bin.

[0013] The beneficial effects of the present application are as follows: the present application can realize the reverse flow and separation of the powder adsorbent and the brine or the desorbent, so that the adsorption and desorption processes of the powder adsorbent can be easily controlled and operated, and the powder adsorbent can be directly adsorbed or desorbed. In addition, the present application has the advantages of simple structure, low investment cost and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole connection schematic view of the superfine adsorbent powder reverse flow adsorption and desorption device in the embodiment of the present application;

[0015] Figure 2 It is a specific component schematic view of the stirring tank in the embodiment of the present application;

[0016] Figure 3 It is a specific component schematic view of the thickener in the embodiment of the present application. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0018] This embodiment provides a countercurrent adsorption and desorption device for ultrafine adsorbent powder, such as... Figure 1 As shown, a multi-stage mixing and thickening assembly is included. Each stage of the mixing and thickening assembly includes a mixing tank 1 and a thickener 2. The upper part of the mixing tank 1 is provided with an overflow port 11, the upper part of the thickener 2 has a thickening overflow port 21, and the bottom of the thickener 2 has a thickening underflow port 22. In each stage of the mixing and thickening assembly, the overflow port 11 of the mixing tank 1 is connected to the thickener 2, the thickening overflow port 21 of the thickener 2 is connected to the mixing tank 1 of the next stage of the mixing and thickening assembly, and the thickening underflow port 22 of the thickener 2 is connected to the mixing tank 1 of the current stage of the mixing and thickening assembly and / or the previous stage of the mixing and thickening assembly.

[0019] In this embodiment, the thickener 21 of the thickener 2 of the last stage stirring and thickening combination mechanism is connected to the storage tank.

[0020] In each stage of the stirred thickening assembly, the slurry (a mixture of brine and powdered adsorbent for adsorption, and a mixture of desorbent and loaded powdered adsorbent for desorption) is thoroughly stirred and adsorbed / desorbed in the stirred tank 1, and then flows into the thickener 2 from the overflow port above the stirred tank 1. The material containing ultrafine powdered adsorbent and brine or desorbent overflows from the overflow port of the stirred tank 1 into the thickener. The ultrafine powdered adsorbent eventually settles naturally and accumulates at the bottom of the thickener, then is pumped from the thickener underflow port into the stirred tank of the current or previous stage of the stirred thickening assembly. The clear liquid (brine or desorbent) flows from the thickener overflow port into the stirred tank of the next stage of the stirred thickening assembly. If it is the thickener of the final stage of the stirred thickening assembly, it flows into the storage tank.

[0021] In this embodiment, as Figure 2As shown in the figure, the stirring tank 1 is in a cylindrical shape, and its top is provided with an injection inlet 12, which is used to connect the thickening overflow port of the thickener of the upper-stage stirring and thickening combined mechanism and / or the thickened underflow port of the thickener of the current-stage stirring and thickening combined mechanism; the stirring tank 1 is provided with a stirring motor 3 and a stirring paddle 4, the stirring paddle 4 is located inside the stirring tank 1, and the stirring motor 3 is used to drive the stirring paddle 4 to rotate axially. The superfine powder adsorbent and the brine or desorbent are fully contacted in the stirring tank through stirring, so that better adsorption or desorption effect can be obtained. The thickened overflow port of the thickener of the upper-stage stirring and thickening combined mechanism injects the clear liquid into the stirring tank through the injection inlet, and the thickened underflow port of the thickener of the current-stage stirring and thickening combined mechanism returns the powder adsorbent into the stirring tank through the injection inlet.

[0022] In the embodiment, as shown in the figure, the upper part of the thickener 2 is in a cylindrical shape, and the lower part is in an inverted conical shape, and the thickened underflow port 22 is located at the bottom end of the lower part in the inverted conical shape. Figure 3

[0023] More specifically, in the embodiment, the thickener 2 is provided with a stirrer 5 and a stirrer driving device 6, the lower end of the stirrer 5 extends into the bottom of the thickener 2, and the stirrer driving device 6 is fixed on the bridge 13 of the thickener 2 and is drivingly connected to the stirrer 5 through a transmission shaft 9. Through the stirring of the stirrer, the thickened underflow can be more easily discharged from the thickened underflow port, and the powder adsorbent can be prevented from caking at the bottom of the thickener and blocking the thickened underflow port.

[0024] Further, the lower end of the stirrer 5 is provided with a triangular scraper 10. Through the further provision of the triangular scraper 10, the underflow at the position close to the thickened underflow port 22 can be stirred better, and the thickened underflow port 22 can be better prevented from being blocked.

[0025] More specifically, in the embodiment, the thickener 2 further comprises a feed pipe 7 and a feed bin 8; the feed bin 8 is arranged inside the thickener 2, is in a hollow cylindrical shape, and is arranged at the middle part of the upper part of the thickener 2; the top and bottom of the feed bin 8 are in an open structure, and the feed bin 8 corresponds to the middle part of the bottom of the thickener 2; the feed pipe 7 is arranged on the bridge 13 of the thickener 2, and its two ends are respectively communicated with the overflow port of the stirring tank 1 and the inside of the feed bin 8. Through the provision of the feed pipe and the feed bin, the material flowing into the thickener can be more concentrated, and the material can be prevented from splashing.

[0026] For those skilled in the art, various corresponding changes and modifications can be given according to the above technical solutions and concepts, and all these changes and modifications should be included in the protection scope of the utility model claim.​

Claims

1. An apparatus for countercurrent adsorption and desorption of ultrafine adsorbent powder, characterized by comprising: The application relates to a multi-stage stirring and thickening combined mechanism, each stage of which comprises a stirring tank (1) and a thickener (2), the upper part of the stirring tank (1) is provided with an overflow port (11), the upper part of the thickener (2) is provided with a thickening overflow port (21), and the bottom part of the thickener (2) is provided with a thickening underflow port (22); in each stage of the stirring and thickening combined mechanism, the overflow port (11) of the stirring tank (1) is communicated with the thickener (2), the thickening overflow port (21) of the thickener (2) is communicated with the stirring tank (1) of the next stage of the stirring and thickening combined mechanism, and the thickening underflow port (22) of the thickener (2) is communicated with the stirring tank (1) of the current stage of the stirring and thickening combined mechanism and / or the stirring tank (1) of the previous stage of the stirring and thickening combined mechanism.

2. The superfines adsorbent powder countercurrent adsorption desorption apparatus according to claim 1, wherein The thickening overflow port (21) of the thickener (2) of the last stage of the stirring and thickening combined mechanism is communicated with a storage tank.

3. The apparatus according to claim 1, wherein the apparatus is characterized by: The stirring tank (1) is in a cylindrical shape, the top part of the stirring tank (1) is provided with an injection port (12), the injection port (12) is used for connecting the thickening overflow port of the thickener of the previous stage of the stirring and thickening combined mechanism and / or the thickening underflow port of the thickener of the current stage of the stirring and thickening combined mechanism, a stirring motor (3) and a stirring paddle (4) are arranged on the stirring tank (1), the stirring paddle (4) is arranged in the stirring tank (1), and the stirring motor (3) is used for driving the axial rotation of the stirring paddle (4).

4. The ultrafine adsorbent powder countercurrent adsorption desorption apparatus according to claim 1, wherein The upper part of the thickener (2) is in a cylindrical shape, the lower part of the thickener (2) is in an inverted conical shape, and the thickening underflow port (22) is arranged at the bottom end of the lower part in the inverted conical shape.

5. The apparatus for countercurrent adsorption and desorption of superfine adsorbent powder according to claim 1 or 4, wherein A stirrer (5) and a stirrer driving device (6) are arranged on the thickener (2), the lower end of the stirrer (5) extends into the bottom part of the thickener (2), the stirrer driving device (6) is fixed on a bridge frame (13) of the thickener (2), and the stirrer driving device (6) is drivingly connected to the stirrer (5) through a transmission shaft (9).

6. The ultrafine adsorbent powder countercurrent adsorption desorption apparatus according to claim 5, wherein The lower end of the stirrer (5) is provided with a triangular scraper (10).

7. The apparatus for countercurrent adsorption and desorption of superfine adsorbent powder according to claim 1 or 4, wherein The thickener (2) further comprises a feeding pipe (7) and a feeding bin (8), the feeding bin (8) is arranged in the thickener (2) and is in a hollow cylindrical shape and arranged at the middle part of the upper part of the thickener (2), the top part and the bottom part of the feeding bin (8) are in an open structure, the feeding bin (8) corresponds to the middle part of the bottom part of the thickener (2), and the feeding pipe (7) is arranged on the bridge frame (13) of the thickener (2) and is communicated with the overflow port of the stirring tank (1) and the inside of the feeding bin (8) at two ends.

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