CN114307362A - Carbon nanotube thick liquids filter equipment - Google Patents
Carbon nanotube thick liquids filter equipment Download PDFInfo
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- CN114307362A CN114307362A CN202111654113.XA CN202111654113A CN114307362A CN 114307362 A CN114307362 A CN 114307362A CN 202111654113 A CN202111654113 A CN 202111654113A CN 114307362 A CN114307362 A CN 114307362A
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- primary
- level
- filter
- microporous filter
- storage tank
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000002041 carbon nanotube Substances 0.000 title claims abstract description 40
- 229910021393 carbon nanotube Inorganic materials 0.000 title claims abstract description 40
- 239000007788 liquid Substances 0.000 title description 2
- 238000001914 filtration Methods 0.000 claims abstract description 58
- 239000002002 slurry Substances 0.000 claims abstract description 56
- 239000011148 porous material Substances 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 7
- 239000012982 microporous membrane Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 abstract description 15
- 238000000926 separation method Methods 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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Abstract
The invention discloses a carbon nano tube slurry filtering device, and belongs to the technical field of carbon nano tube separation. The carbon nano tube slurry filtering device comprises a storage bin, and the storage bin is connected with a primary filter through a storage tank outflow pipe; the primary filter is connected with a primary screw pump through a primary filter outflow pipe; the one-level screw pump is connected with a one-level microporous filter, the one-level microporous filter is connected with a one-level filtering storage tank through a one-level microporous filter outflow pipe, the one-level filtering storage tank is connected with a two-level screw pump through a one-level storage tank outflow pipe, the two-level screw pump is connected with a two-level microporous filter, and the two-level microporous filter is connected with a two-level filtering storage tank through a two-level microporous filter outflow pipe. The carbon nano tube slurry disclosed by the invention is subjected to multi-layer filtration to gradually remove larger particles in the slurry, so that the particle size range of the carbon nano tubes in the slurry is controlled, and the purpose of improving the performance of the slurry is achieved.
Description
Technical Field
The invention relates to a carbon nanotube slurry filtering device, and belongs to the technical field of carbon nanotube separation.
Background
In recent years, carbon nanotubes have been widely used as a novel conductive agent for positive and negative electrode materials of lithium battery cells. In the process of using as lithium ion electrode material, the lithium ion electrode material is usually prepared into slurry for use. However, the carbon nanotubes are easy to agglomerate after being prepared into slurry, and the dispersibility is poor, so that the performance of the carbon nanotubes is greatly influenced.
At present, methods for improving the agglomeration and stability of carbon nanotube slurry mainly include grinding, adding a dispersant, modifying the carbon nanotube, and the like. However, some large agglomerated particles are inevitably generated in the slurry, which results in a relatively wide particle size distribution in the carbon nanotube slurry, thereby affecting the performance of the carbon nanotubes. Therefore, after the carbon nano tubes are prepared into a finished slurry product, the particle size of the carbon nano tubes in the slurry needs to be further screened, so that the influence of larger agglomerated particles is removed, and the performance of the carbon nano tube slurry is further improved.
Disclosure of Invention
The invention aims to provide a carbon nano tube slurry filtering device, which is characterized in that filtering screens with different apertures are arranged in filtering devices of different levels according to requirements, and when the carbon nano tube slurry is filtered and sieved, the slurry sequentially passes through the filtering devices of different levels to remove larger particles in the slurry step by step, so that the particle size range of carbon nano tubes in the slurry is controlled, and the purpose of improving the performance of the slurry is achieved.
The invention provides a carbon nanotube slurry filtering device which comprises a storage bin, wherein the storage bin is connected with a primary filter through a storage tank outflow pipe; the primary filter is connected with a primary screw pump through a primary filter outflow pipe; the one-level screw pump is connected with a one-level microporous filter, the one-level microporous filter is connected with a one-level filtering storage tank through a one-level microporous filter outflow pipe, the one-level filtering storage tank is connected with a two-level screw pump through a one-level storage tank outflow pipe, the two-level screw pump is connected with a two-level microporous filter, and the two-level microporous filter is connected with a two-level filtering storage tank through a two-level microporous filter outflow pipe.
In one embodiment of the present invention, a feed inlet is provided above the storage bin.
In an embodiment of the present invention, the lower end of the secondary filtering storage tank is provided with an outlet of the secondary filtering storage tank.
In one embodiment of the invention, the primary microporous filter outflow pipe is connected to the top end of the primary filtration storage tank, and the primary storage tank outflow pipe is connected to the bottom end of the primary filtration storage tank.
In one embodiment of the invention, a first pressure gauge is arranged between the primary screw pump and the primary microporous filter.
In one embodiment of the invention, a second pressure gauge is arranged between the two-stage screw pump and the two-stage microporous filter.
In an embodiment of the present invention, filter elements are disposed in the primary microporous filter and the secondary microporous filter, the filter elements are microporous membranes, and pore diameters of the microporous membranes of the primary microporous filter are larger than pore diameters of the microporous membranes of the secondary microporous filter.
In an embodiment of the present invention, the number of the first pressure gauge, the first-stage microporous filter, the second-stage microporous filter and the second pressure gauge is two.
In an embodiment of the present invention, a filter screen is disposed in the primary filter, and a pore size of the filter screen is larger than a pore size of the microporous membrane of the primary microporous filter.
Advantageous effects
1. According to the invention, the primary filter, the primary microporous filter and the secondary microporous filter are arranged, so that the multilayer filtration of the carbon nanotube slurry is realized, filter screens with different apertures are installed in the filtering devices of different levels according to requirements, and when the carbon nanotube slurry is filtered and sieved, the slurry sequentially passes through the filtering devices of different levels to remove larger particles in the slurry step by step, so that the particle size range of the carbon nanotube in the slurry is controlled, and the purpose of improving the performance of the slurry is achieved.
2. The first pressure gauge and the second pressure gauge can detect the pressure of slurry flowing through the pipeline in real time, the working condition of the screw pump is properly adjusted according to the pressure, and the screw pump is convenient to operate, safe and reliable.
Drawings
Fig. 1 is a schematic structural view of a carbon nanotube slurry filtering apparatus according to the present invention.
Wherein: 1. a storage bin; 2. a feed inlet; 3. a first-stage screw pump; 4. a first pressure gauge; 5. a first stage microporous filter; 6. a primary microporous filter effluent pipe; 7. a two-stage screw pump; 8. a secondary microporous filter; 9. a secondary microporous filter effluent pipe; 10. a storage tank outflow pipe; 11. a primary filter; 12. a primary filter outlet tube; 13. a primary filtration storage tank; 14. a primary storage tank outlet pipe; 15. a secondary filtration storage tank; 16. the outlet of the secondary filtering storage tank; 17. and a second pressure gauge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
A carbon nanotube slurry filtering device is shown in figure 1 and comprises a storage bin 1, wherein a feed inlet 2 is arranged above the storage bin 1, and a primary filter 11 is connected below the storage bin 1 through a storage tank outlet pipe 10; the primary filter 11 is connected with a primary screw pump 3 through a primary filter outflow pipe 12; the primary screw pump 3 is connected with a primary microporous filter 5, the primary microporous filter 5 is connected with a primary filtering storage tank 13 through a primary microporous filter outflow pipe 6, the primary filtering storage tank 13 is connected with a secondary screw pump 7 through a primary storage tank outflow pipe 14, the secondary screw pump 7 is connected with a secondary microporous filter 8, and the secondary microporous filter 8 is connected with a secondary filtering storage tank 15 through a secondary microporous filter outflow pipe 9.
Further, the lower end of the secondary filtering and storing tank 15 is provided with a secondary filtering and storing tank outlet 16.
Further, the primary microporous filter outflow pipe 6 is connected to the top end of the primary filtering storage tank 13, and the primary storage tank outflow pipe 14 is connected to the bottom end of the primary filtering storage tank 13.
Further, a first pressure gauge 4 is arranged between the primary screw pump 3 and the primary microporous filter 5. The first pressure gauge 4 is used for detecting the pressure of slurry flowing through the pipeline and properly adjusting the working condition of the primary screw pump 3 according to the pressure.
Further, a second pressure gauge 17 is arranged between the two-stage screw pump 7 and the two-stage microporous filter 8. The second pressure gauge 17 is used for detecting the pressure of the slurry flowing through the pipeline and properly adjusting the working condition of the two-stage screw pump 7 according to the pressure.
Furthermore, filter elements are arranged in the first-stage microporous filter 5 and the second-stage microporous filter 8, the filter elements are microporous membranes, and the pore diameter of the microporous membrane of the first-stage microporous filter 5 is larger than that of the microporous membrane of the second-stage microporous filter 8.
Further, a filter screen is arranged in the primary filter 11, and the pore size of the filter screen is larger than that of the microporous membrane of the primary microporous filter 5.
Further, the number of the first pressure gauge 4, the first-stage microporous filter 5, the second-stage microporous filter 8 and the second pressure gauge 17 is two.
The working principle of the invention is as follows: when the carbon nanotube slurry is filtered, the carbon nanotube slurry is added into the storage bin 1 through the feeding port 2, the slurry enters the primary filter 11 through the outflow pipe 10 of the storage tank through the primary screw pump 3, the primary filtration of the slurry is realized in the primary filter 11, and large-particle aggregates in the slurry are removed. Then, the slurry from which the large-particle agglomerates are removed flows out of the primary filter 11, and is stored in a primary filtering storage tank 13 through a primary microporous filter 5 and a primary microporous filter outflow pipe 6 in sequence, and the slurry is subjected to secondary filtering in the primary microporous filter 5, so that the agglomerates of medium particles in the slurry are removed. And then, the secondary screw pump 7 continuously pumps the carbon nanotube slurry into the secondary microporous filter 8, the slurry is filtered for three times in the secondary microporous filter 8, second-order large particles in the slurry are removed, and the slurry is stored in a secondary filtering storage tank 15 through a secondary microporous filter outflow pipe 9. The filter elements of the first-stage microporous filter 5 and the second-stage microporous filter 8 are microporous membranes, and the pore size of the microporous membranes can be selected according to the quality index of the slurry product. Meanwhile, after the slurry is subjected to secondary filtration, if necessary, more precise particle size screening is carried out, and four-stage filtration can be continuously added after the third-stage filtration, so that five-stage filtration can be carried out.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (9)
1. The carbon nanotube slurry filtering device is characterized by comprising a storage bin, wherein the storage bin is connected with a primary filter through a storage tank outflow pipe; the primary filter is connected with a primary screw pump through a primary filter outflow pipe; the one-level screw pump is connected with a one-level microporous filter, the one-level microporous filter is connected with a one-level filtering storage tank through a one-level microporous filter outflow pipe, the one-level filtering storage tank is connected with a two-level screw pump through a one-level storage tank outflow pipe, the two-level screw pump is connected with a two-level microporous filter, and the two-level microporous filter is connected with a two-level filtering storage tank through a two-level microporous filter outflow pipe.
2. The carbon nanotube slurry filtration device of claim 1, wherein the storage bin has a feed inlet above it.
3. The carbon nanotube slurry filtration device according to claim 2, wherein the secondary filtration storage tank is provided at a lower end thereof with a secondary filtration storage tank outlet.
4. The carbon nanotube slurry filtering device according to claim 3, wherein the primary microporous filter outflow pipe is connected to the top end of the primary filtration storage tank, and the primary storage tank outflow pipe is connected to the bottom end of the primary filtration storage tank.
5. The carbon nanotube slurry filtration device of claim 4, wherein a first pressure gauge is disposed between the primary screw pump and the primary microporous filter.
6. The carbon nanotube slurry filtration device of claim 5, wherein a second pressure gauge is disposed between the two-stage screw pump and the two-stage microporous filter.
7. The carbon nanotube slurry filtering device according to claim 6, wherein the primary microporous filter and the secondary microporous filter are provided with filter elements, the filter elements are microporous membranes, and the pore size of the microporous membrane of the primary microporous filter is larger than that of the microporous membrane of the secondary microporous filter.
8. The carbon nanotube slurry filtration device of claim 7, wherein the number of the first pressure gauge, the first-stage microporous filter, the second-stage microporous filter, and the second pressure gauge is two.
9. The carbon nanotube slurry filtration device of claim 8, wherein a strainer is disposed in the primary filter, and the pore size of the strainer is larger than the pore size of the microporous membrane of the primary microporous filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654113.XA CN114307362A (en) | 2021-12-30 | 2021-12-30 | Carbon nanotube thick liquids filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654113.XA CN114307362A (en) | 2021-12-30 | 2021-12-30 | Carbon nanotube thick liquids filter equipment |
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| Publication Number | Publication Date |
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| CN114307362A true CN114307362A (en) | 2022-04-12 |
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| CN202111654113.XA Pending CN114307362A (en) | 2021-12-30 | 2021-12-30 | Carbon nanotube thick liquids filter equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026731A (en) * | 2022-11-17 | 2023-04-28 | 山东希诚新材料科技有限公司 | Method for judging whether dispersion of carbon nano tube slurry meets standard by in-situ identification of particle size |
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2021
- 2021-12-30 CN CN202111654113.XA patent/CN114307362A/en active Pending
Patent Citations (10)
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|---|---|---|---|---|
| US20090163347A1 (en) * | 2007-12-20 | 2009-06-25 | Chevron U.S.A. Inc. | Recovery of slurry unsupported catalyst |
| US20120238777A1 (en) * | 2009-09-11 | 2012-09-20 | Technische Universitat Wien | Method and device for concentrating material solutions |
| CN202893205U (en) * | 2012-11-16 | 2013-04-24 | 湖北楚天舒药业有限公司 | Multistage ultra-filtration continuous filtration device |
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Application publication date: 20220412 |