Centrifugal filtering recovery system for superfine powder

Abstract

The utility model discloses a centrifugal filtration recovery system for superfine powder, which comprises a storage tank and a centrifugal filter, the discharge end of the storage tank is connected with the feed end of the centrifugal filter through a feed module, and the liquid outlet end of the centrifugal filter is connected with a solvent recovery pipe. The discharging end of the centrifugal filter is connected with a secondary settling tank through a discharging module, the liquid outlet end of the secondary settling tank is connected with a solvent recovery pipe in parallel through a backflow module, the secondary settling tank is connected with an air outlet module and an air inlet module, and the air inlet module is communicated with the air outlet module through the secondary settling tank; the device is simple in structure and convenient to use, materials obtained after centrifugal filtering of superfine powder are conducted are conveniently collected again, the superfine powder obtained after centrifugal filtering is conducted is recycled after secondary sedimentation, loss is reduced, and the product yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafine powder preparation, in particular to a centrifugal filtration recovery system for ultrafine powder. Background Art

[0002] Centrifugal filtration of ultrafine powders in organic solvents presents challenges with centrifugal diafiltration. Traditional collection tanks cannot effectively recover the diafiltration product. Furthermore, during the production process, operators frequently come into contact with the intermediate product, posing a risk of foreign matter intrusion. Organic solvents are also volatile, potentially leading to safety issues. The inability to effectively recover the diafiltration product leads to quality degradation during centrifugal solvent distillation, resulting in high production costs. Utility Model Content

[0003] The utility model provides a centrifugal diafiltration recovery system for ultrafine powder, aiming to solve the problem of product loss caused by centrifugal diafiltration.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A centrifugal filtration recovery system for ultrafine powder comprises a storage tank and a centrifugal filter, wherein the discharge end of the storage tank is connected to the feed end of the centrifugal filter via a feed module, the liquid outlet end of the centrifugal filter is connected to a solvent recovery pipe, the discharge end of the centrifugal filter is connected to a secondary sedimentation tank via the discharge module, the liquid outlet end of the secondary sedimentation tank is connected in parallel with the solvent recovery pipe via a reflux module, an air outlet module and an air intake module are connected to the secondary sedimentation tank, and the air intake module is connected to the air outlet module via the secondary sedimentation tank.

[0006] Preferably, the feed module includes a feed pipe, the discharge end of the storage tank is connected to the feed end of the centrifugal filter through the feed pipe, and a feed valve and a feed pump are sequentially provided on the feed pipe along the conveying direction.

[0007] As a more preferred embodiment, the secondary sedimentation tank is located directly below the discharge end of the centrifugal filter, and the discharge module is arranged vertically.

[0008] Furthermore, the discharge module includes a discharge pipe, the top end of the discharge pipe is sealedly connected to the discharge end of the centrifugal filter through a flange, the bottom end of the discharge pipe is sealedly passed through the secondary sedimentation tank, and a discharge valve is provided on the discharge pipe.

[0009] Furthermore, the reflux module includes a reflux pipe connected to the liquid outlet end of the secondary sedimentation tank, the other end of the reflux pipe is connected in parallel with the solvent recovery pipe, and a reflux valve, a reflux pump and a one-way valve are sequentially provided on the reflux pipe along the conveying direction.

[0010] Specifically, the air intake module includes an air intake pipe connected to the air intake end of the secondary sedimentation tank, and an air intake pump and an air intake valve are sequentially provided on the air intake pipe along the air intake direction.

[0011] More specifically, the gas outlet module includes a gas outlet pipe connected to the gas outlet end of the secondary sedimentation tank, and the gas outlet pipe is provided with a gas outlet valve.

[0012] In detail, the secondary sedimentation tank includes a tank body, a partition plate is provided in the middle position of the tank body, the partition plate divides the tank body into two sedimentation tanks, a liquid outlet is provided on one side of the tank body, the liquid outlet is facing the partition plate, the sedimentation tank away from the liquid outlet is the first-stage sedimentation tank, and the sedimentation tank close to the liquid outlet is the second-stage sedimentation tank. The bottom end of the discharge pipe is located in the first-stage sedimentation tank, and an overflow port is provided on the top of the partition plate.

[0013] In more detail, the bottom of the overflow port is higher than the top of the liquid outlet, and the liquid outlet is sealed and connected to the return pipe through a flange.

[0014] Preferably, a sealing cover is detachably sealed and clamped on the top of the trough body, and the bottom end of the discharge pipe is sealed through the sealing cover. The sealing cover is located on the top of one side of the first-stage sedimentation tank and is provided with an air inlet, which is sealed and connected to the air inlet pipe through a flange. The sealing cover is located on the top of one side of the second-stage sedimentation tank and is provided with an air outlet, which is sealed and connected to the air outlet pipe through a flange.

[0015] More preferably, two sides of the top of the sealing cover are provided with hanging rings, and the hanging rings are symmetrical about the middle position of the top of the sealing cover.

[0016] Beneficial effects of the utility model:

[0017] 1. To recover the product from centrifugal diafiltration, the system performs a primary filtration through a centrifugal filter. Parameters are controlled so that the product after the primary centrifugal filtration is an organic solvent mixed with a portion of diafiltration ultrafine material. The product enters a secondary sedimentation tank for secondary filtration through sedimentation, leaving the ultrafine material in the tank body, while the organic solvent enters the reflux module through overflow. The reflux module is connected in parallel with the solvent recovery pipe at the liquid outlet of the centrifuge. After the solvent is recovered together, the solvent and residual material are recovered and processed, the ultrafine material in the diafiltration is recovered, thereby improving the product yield and reducing losses.

[0018] 2. The secondary sedimentation tank is easy to open and can be filled with nitrogen through the air inlet module before opening, and the nitrogen and volatile organic solvents can be transferred through the air outlet module to facilitate product recovery and reduce organic solvent residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of system connection of the present utility model;

[0020] Figure 2 It is a three-dimensional schematic diagram of the secondary sedimentation tank of the utility model;

[0021] Figure 3This is a schematic internal perspective diagram of the secondary sedimentation tank of the present invention;

[0022] In the figure: 1. Storage tank;

[0023] 2. Feed module; 201. Feed valve; 202. Feed pump; 203. Feed pipe;

[0024] 3. Centrifugal filter;

[0025] 4. Secondary sedimentation tank; 401. Tank body; 402. Separator; 403. Overflow port; 404. Sealing cover; 405. Air inlet; 406. Air outlet; 407. Lifting ring; 408. Liquid outlet;

[0026] 5. Intake module; 501. Intake pump; 502. Intake valve; 503. Intake pipe;

[0027] 6. Reflux module; 601. Reflux valve; 602. Reflux pipe; 603. Reflux pump; 604. One-way valve;

[0028] 7. Discharge module; 701. Discharge valve; 702. Discharge pipe;

[0029] 8. Solvent recovery pipe

[0030] 9. Air outlet module; 901. Air outlet pipe; 902. Air outlet valve. DETAILED DESCRIPTION

[0031] As follows, embodiments are further described with reference to the accompanying drawings.

[0032] like Figures 1-3 As shown, as a preferred embodiment 1, a centrifugal filtration recovery system for ultrafine powder includes a storage tank 1 and a centrifugal filter 3, the discharge end of the storage tank 1 is connected to the feed end of the centrifugal filter 3 through a feed module 2, the liquid outlet end of the centrifugal filter 3 is connected to a solvent recovery pipe 8, the discharge end of the centrifugal filter 3 is connected to a secondary sedimentation tank 4 through a discharge module 7, the liquid outlet end of the secondary sedimentation tank 4 is connected in parallel with the solvent recovery pipe 8 through a reflux module 6, the secondary sedimentation tank 4 is connected to an air outlet module 9 and an air intake module 5, and the air intake module 5 is connected to the air outlet module 9 through the secondary sedimentation tank 4. Storage tank 1 stores an organic solvent and a small amount of ultrafine material filtered through centrifugation. A primary filtration is performed through centrifugal filter 3. Parameters are controlled so that the product after the primary centrifugal filtration is an organic solvent mixed with a portion of the ultrafine material filtered through diafiltration. The product enters secondary sedimentation tank 4 for secondary filtration through sedimentation, leaving the ultrafine material in tank body 401. The organic solvent overflows into reflux module 6 and is connected in parallel to a solvent recovery pipe 8 at the liquid outlet of the centrifuge. After the solvent is recovered together, the solvent and residual material are recovered and processed, and the ultrafine material in the diafiltration is recovered, thereby improving product yield and reducing losses.

[0033] The secondary sedimentation tank 4 is easy to open and can be filled with nitrogen through the air inlet module 5 before opening, and the nitrogen and the volatilized organic solvent are transferred through the air outlet module 6 to facilitate product recovery and reduce organic solvent residue.

[0034] The feed module 2 includes a feed pipe 203, and the discharge end of the storage tank 1 is connected to the feed end of the centrifugal filter 3 through the feed pipe 203. A feed valve 201 and a feed pump 202 are sequentially provided on the feed pipe 203 along the conveying direction to ensure feeding and facilitate the start of centrifugal filtration.

[0035] The secondary sedimentation tank 4 is located directly below the discharge end of the centrifugal filter 3 , and the discharge module 7 is arranged vertically.

[0036] The discharge module 7 includes a discharge pipe 702. The top end of the discharge pipe 702 is sealedly connected to the discharge end of the centrifugal filter 3 via a flange. The bottom end of the discharge pipe 702 is sealedly extended into the secondary sedimentation tank 4. The discharge pipe 702 is provided with a discharge valve 701. To facilitate the arrangement of the discharge module 7, the centrifuged product falls directly by gravity to the bottom of the secondary sedimentation tank 4 for sedimentation.

[0037] The reflux module 6 includes a reflux pipe 602 connected to the liquid outlet of the secondary sedimentation tank 4. The other end of the reflux pipe 602 is connected in parallel to the solvent recovery pipe 8. The reflux pipe 602 is provided with a reflux valve 601, a reflux pump 603, and a one-way valve 604 in the delivery direction. This ensures unidirectional reflux and uniform solvent recovery.

[0038] The air intake module 5 includes an air intake pipe 503 connected to the air intake end of the secondary sedimentation tank 4. An air intake pump 501 and an air intake valve 502 are sequentially provided on the air intake pipe 503 along the air intake direction to facilitate nitrogen filling and remove residual volatile organic solvents.

[0039] The gas outlet module 9 includes a gas outlet pipe 901 connected to the gas outlet end of the secondary sedimentation tank 4. The gas outlet pipe 901 is provided with a gas outlet valve 902. This facilitates the collection of nitrogen containing organic solvents, forming a nitrogen cycle, removing organic solvents, ensuring the safety of product recovery, and reducing the solvent content in the product, facilitating subsequent operations.

[0040] The secondary sedimentation tank 4 includes a tank body 401, a partition plate 402 is provided in the middle of the tank body 401, and the partition plate 402 divides the tank body 401 into two sedimentation tanks. A liquid outlet 408 is provided on one side of the tank body 401, and the liquid outlet 408 is directly opposite the partition plate 402. The sedimentation tank away from the liquid outlet 408 is the first-stage sedimentation tank, and the sedimentation tank close to the liquid outlet 408 is the second-stage sedimentation tank. The bottom end of the discharge pipe 702 is located in the first-stage sedimentation tank, and the top of the partition plate 402 is provided with an overflow port 403. The product first enters the first-stage sedimentation tank for primary sedimentation, and the supernatant enters the second-stage sedimentation tank through the overflow port 403 for secondary sedimentation. The organic solvent after the secondary sedimentation enters the reflux module 6 through the liquid outlet 408, forming a secondary gradient sedimentation, and the product remains in the tank body 401.

[0041] The bottom of the overflow port 403 is higher than the top of the liquid outlet 408 , and the liquid outlet 408 is sealedly connected to the reflux pipe 602 via a flange to ensure the formation of gradient sedimentation.

[0042] The top of the trough body 401 is detachably sealed with a sealing cover 404, and the bottom end of the discharge pipe 702 is sealed through the sealing cover 404. The sealing cover 404 is located on the top of the first-stage sedimentation tank and is provided with an air inlet 405. The air inlet 405 is sealed and connected to the air inlet pipe 503 through a flange. The sealing cover 404 is located on the top of the second-stage sedimentation tank and is provided with an air outlet 406. The air outlet 406 is sealed and connected to the air outlet pipe 901 through a flange, ensuring that the gas enters the second-stage sedimentation tank after passing through the first-stage sedimentation tank, and is then discharged from the air outlet 406, fully taking away the volatile organic solvent inside.

[0043] Hanging rings 407 are provided on both sides of the top of the sealing cover 404 . The hanging rings 407 are symmetrical about the middle position of the top of the sealing cover 404 , making it easy to open the sealing cover 404 .

[0044] The working principle of this utility model:

[0045] Storage tank 1 stores an organic solvent and a small amount of ultrafine material filtered through centrifugation. A primary filtration is performed through centrifugal filter 3. Parameters are controlled so that the product after the primary centrifugal filtration is an organic solvent mixed with a portion of the ultrafine material filtered through diafiltration. The product enters secondary sedimentation tank 4 for secondary filtration through sedimentation, leaving the ultrafine material in tank body 401. The organic solvent overflows into reflux module 6 and is connected in parallel to a solvent recovery pipe 8 at the liquid outlet of the centrifuge. After the solvent is recovered together, the solvent and residual material are recovered and processed, and the ultrafine material in the diafiltration is recovered, thereby improving product yield and reducing losses.

[0046] The secondary sedimentation tank 4 is easy to open and can be filled with nitrogen through the air inlet module 5 before opening, and the nitrogen and the volatilized organic solvent are transferred through the air outlet module 6 to facilitate product recovery and reduce organic solvent residue.

Claims

1. A centrifugal filtration recovery system for ultrafine powder, comprising a storage tank (1) and a centrifugal filter (3), characterized in that: The discharge end of the storage tank (1) is connected to the feed end of the centrifugal filter (3) through the feed module (2); the liquid discharge end of the centrifugal filter (3) is connected to the solvent recovery pipe (8); the discharge end of the centrifugal filter (3) is connected to the secondary sedimentation tank (4) through the discharge module (7); the liquid discharge end of the secondary sedimentation tank (4) is connected in parallel with the solvent recovery pipe (8) through the reflux module (6); the secondary sedimentation tank (4) is connected to the gas outlet module (9) and the gas inlet module (5), and the gas inlet module (5) is communicated with the gas outlet module (9) through the secondary sedimentation tank (4).

2. A centrifugal diafiltration recovery system for ultrafine powder according to claim 1, characterized in that: The feed module (2) comprises a feed pipe (203), the discharge end of the storage tank (1) is connected to the feed end of the centrifugal filter (3) via the feed pipe (203), and a feed valve (201) and a feed pump (202) are sequentially provided on the feed pipe (203) along the conveying direction.

3. A centrifugal diafiltration recovery system for ultrafine powder according to claim 2, characterized in that: The secondary sedimentation tank (4) is located directly below the discharge end of the centrifugal filter (3), and the discharge module (7) is arranged vertically.

4. A centrifugal diafiltration recovery system for ultrafine powder according to claim 3, characterized in that: The discharge module (7) comprises a discharge pipe (702), the top end of the discharge pipe (702) being sealedly connected to the discharge end of the centrifugal filter (3) via a flange, the bottom end of the discharge pipe (702) being sealedly passed through the secondary sedimentation tank (4), and a discharge valve (701) being provided on the discharge pipe (702).

5. A centrifugal diafiltration recovery system for ultrafine powder according to claim 4, characterized in that: The reflux module (6) comprises a reflux pipe (602) connected to the liquid outlet end of the secondary sedimentation tank (4); the other end of the reflux pipe (602) is connected in parallel to the solvent recovery pipe (8); and a reflux valve (601), a reflux pump (603) and a one-way valve (604) are sequentially provided on the reflux pipe (602) along the conveying direction.

6. A centrifugal diafiltration recovery system for ultrafine powder according to claim 5, characterized in that: The air intake module (5) comprises an air intake pipe (503) connected to the air intake end of the secondary sedimentation tank (4), and an air intake pump (501) and an air intake valve (502) are sequentially provided on the air intake pipe (503) along the air intake direction.

7. A centrifugal diafiltration recovery system for ultrafine powder according to claim 6, characterized in that: The gas outlet module (9) comprises a gas outlet pipe (901) connected to the gas outlet end of the secondary sedimentation tank (4), and a gas outlet valve (902) is provided on the gas outlet pipe (901).

8. A centrifugal diafiltration recovery system for ultrafine powder according to claim 7, characterized in that: The secondary sedimentation tank (4) includes a tank body (401), a partition plate (402) is provided in the middle of the tank body (401), and the partition plate (402) divides the tank body (401) into two sedimentation tanks. A liquid outlet (408) is provided on one side of the tank body (401), and the liquid outlet (408) is directly opposite the partition plate (402). The sedimentation tank away from the liquid outlet (408) is the first-stage sedimentation tank, and the sedimentation tank close to the liquid outlet (408) is the second-stage sedimentation tank. The bottom end of the discharge pipe (702) is located in the first-stage sedimentation tank. An overflow port (403) is provided at the top of the partition plate (402), and the bottom of the overflow port (403) is higher than the top of the liquid outlet (408). The liquid outlet (408) is sealed and connected to the return pipe (602) through a flange.

9. A centrifugal diafiltration recovery system for ultrafine powder according to claim 8, characterized in that: The top of the tank body (401) is detachably sealed with a sealing cover (404), the bottom end of the discharge pipe (702) sealably penetrates the sealing cover (404), the sealing cover (404) is provided with an air inlet (405) at the top on one side of the first-stage sedimentation tank, the air inlet (405) is sealably connected to the air inlet pipe (503) via a flange, and the sealing cover (404) is provided with an air outlet (406) at the top on one side of the second-stage sedimentation tank, the air outlet (406) is sealably connected to the air outlet pipe (901) via a flange.

10. A centrifugal diafiltration recovery system for ultrafine powder according to claim 9, characterized in that: Hanging rings (407) are provided on both sides of the top of the sealing cover (404), and the hanging rings (407) are symmetrical about the middle position of the top of the sealing cover (404).

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