CN-224208213-U - Dry-type direct-cooling superconducting magnetic separation equipment for removing impurities from carbon nanotube conductive slurry

CN224208213UCN 224208213 UCN224208213 UCN 224208213UCN-224208213-U

Abstract

The utility model discloses dry-type direct-cooling superconducting magnetic separation equipment for removing impurities from carbon nanotube conductive paste, and relates to the technical field of carbon nanotube conductive paste impurity removal. The utility model adopts the direct cooling technology of the refrigerator to cool the superconducting magnet coil, does not need to rely on liquid helium to maintain the superconducting state, so that the refrigeration energy consumption is reduced by more than 50 percent, the superconducting magnet almost has zero resistance in steady operation, only needs to maintain a small amount of low-temperature electric energy, so that the comprehensive energy consumption of equipment is reduced, the magnetic field strength of the superconducting magnet is not less than 4.5T, and the design of a high gradient magnetic field is combined, so that magnetic and weak magnetic impurities with the particle size of more than 1 mu m can be captured, the impurity removal rate is improved, meanwhile, the occupied area of the equipment is not more than 5m 2 , the vehicle-mounted movable deployment can be supported, the device is suitable for a high clean workshop with limited space, the volatilization risk of the liquid helium is avoided, the service life of the superconducting magnet is more than 10 years, and the continuous operation can be supported.

Inventors

HUANG FEIXIANG
CAI FANGSHUO
LI LAIFENG
SHAN XINRAN
LIU PENG
REN MENGYUE

Assignees

杭州中科凯凌科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250520

Claims (5)

1. The dry-type direct-cooling superconducting magnetic separation device for removing impurities from the carbon nanotube conductive slurry comprises a superconducting magnet (1) and is characterized in that a refrigerator (2) is mounted on the outer surface of the superconducting magnet (1), the cold end of the refrigerator (2) is in contact with a coil of the superconducting magnet (1), an impurity removing component for removing impurities from the carbon nanotube conductive slurry is arranged in the superconducting magnet (1), and a hydraulic flushing component and an air sweeping component for cleaning the impurity removing component are arranged outside the superconducting magnet (1).
2. A dry direct cooling superconducting magnetic separation device for removing impurities from carbon nanotube conductive paste according to claim 1, wherein the impurity removing component comprises a central pipeline (301) fixed on the inner wall of a superconducting magnet (1), and a first connecting pipe (303) and a second connecting pipe (304) which are communicated with the corresponding position of the central pipeline (301), the inner wall of the central pipeline (301) is fixedly connected with a composite screen group (302) for filtering the carbon nanotube conductive paste, two ports of the second connecting pipe (304) far away from the central pipeline (301) are respectively communicated with a third connecting pipe (305) and a fourth connecting pipe (306), the outer surfaces of the third connecting pipe (305) and the fourth connecting pipe (306) are respectively provided with a first valve (307) and a second valve (308), one end of the fourth connecting pipe (306) far away from the second connecting pipe (304) is provided with a first movable diaphragm pump (309) for conveying the carbon nanotube conductive paste, one end of the first connecting pipe (303) far away from the central pipeline (301) is communicated with a fifth connecting pipe (305), and the outer surface of the fifth connecting pipe (3010) is provided with a fifth valve 3010.
3. The dry direct-cooling superconducting magnetic separation device for removing impurities from carbon nanotube conductive paste according to claim 2, wherein the hydraulic flushing assembly comprises a sixth connecting pipe (401) communicated with the central pipeline (301) and an ultrasonic cleaning rod (405) inserted into the central pipeline (301), one end, far away from the central pipeline (301), of the sixth connecting pipe (401) is communicated with a seventh connecting pipe (402), a fourth valve (403) is arranged on the outer surface of the seventh connecting pipe (402), and a second pneumatic diaphragm pump (404) for conveying flushing water is arranged on one end, far away from the seventh connecting pipe (402), of the fourth valve (403).
4. A dry direct-cooling superconducting magnetic separation device for removing impurities from carbon nanotube conductive paste according to claim 2, wherein the air sweeping assembly comprises an eighth connecting pipe (501) communicated with a central pipeline (301), a fifth valve (502) is arranged on the outer surface of the eighth connecting pipe (501), and a pneumatic triple piece (503) communicated with an external air source is arranged at one end, far away from the central pipeline (301), of the eighth connecting pipe (501).
5. The dry direct-cooling superconducting magnetic separation device for removing impurities from carbon nanotube conductive paste according to claim 2, wherein the composite screen set (302) is formed by combining a plurality of groups of honeycomb punching plates, diamond-shaped screens, corrugated screens and Teflon partitions.

Description

Dry-type direct-cooling superconducting magnetic separation equipment for removing impurities from carbon nanotube conductive slurry Technical Field The utility model relates to the technical field of carbon nanotube conductive paste impurity removal, in particular to dry-type direct-cooling superconducting magnetic separation equipment for carbon nanotube conductive paste impurity removal. Background The current impurity removal process for the carbon nanotube conductive paste mainly adopts physical filtration, permanent magnet bar impurity removal and conventional electromagnetic separation technology. The physical filtration technology realizes impurity interception through a multistage screen, is suitable for millimeter-level particle removal, the permanent magnet bar impurity removal technology utilizes permanent magnets such as neodymium iron boron and the like to generate a 0.8-1.2T static magnetic field, captures ferromagnetic impurities (such as ferroferric oxide, metal scraps and the like) in a direct adsorption mode, has a simple equipment structure and does not need external power supply, and the conventional electromagnetic separation technology adopts an excitation coil to generate a dynamic magnetic field less than or equal to 1.5T and can periodically remove adsorbed impurities. In the three carbon nanotube conductive paste impurity removal modes, a physical filtration technology is adopted to have the risk of blocking a filter screen and cannot treat micron-sized non-magnetic impurities, a permanent magnet bar impurity removal technology is adopted to have the capturing efficiency of paramagnetic substances (such as chromium oxide and titanium dioxide) of less than 15 percent, a magnetic field shielding effect caused by the accumulation of impurities on the surface of a magnetic bar exists, and the separation efficiency of micron-sized (< 100 mu m) weak magnetic impurities still cannot meet the requirements of high-end users in the new energy battery industry by adopting a conventional electromagnetic separation technology. Disclosure of utility model The utility model aims to make up the defects of the prior art and provides dry-type direct-cooling superconducting magnetic separation equipment for removing impurities from carbon nanotube conductive paste. The dry-type direct-cooling superconducting magnetic separation device for removing impurities from the carbon nanotube conductive slurry comprises a superconducting magnet, wherein a refrigerator is arranged on the outer surface of the superconducting magnet, the cold end of the refrigerator is in contact with a coil of the superconducting magnet, an impurity removing component for removing impurities from the carbon nanotube conductive slurry is arranged in the superconducting magnet, and a hydraulic flushing component and an air sweeping component for cleaning the impurity removing component are arranged outside the superconducting magnet. Further, the edulcoration subassembly is including being fixed in the central pipeline on the superconducting magnet inner wall to and with central pipeline corresponds the first connecting pipe and the second connecting pipe that position department is linked together, the inner wall fixedly connected with of central pipeline is used for the filterable compound screen mesh group of carbon nanotube conductive paste, two ports that the central pipeline was kept away from to the second connecting pipe are linked together respectively and are had third connecting pipe and fourth connecting pipe, and first valve and second valve are installed respectively to the surface of third connecting pipe and fourth connecting pipe, the first pneumatic diaphragm pump that is used for the transport of carbon nanotube conductive paste is installed to the one end that the second connecting pipe was kept away from to the fourth connecting pipe, the one end that the central pipeline was kept away from to the first connecting pipe is linked together and is had the fifth connecting pipe, and the third valve is installed to the surface of fifth connecting pipe, through the cooperation setting between the above-mentioned structure, magnetism in the conductive paste of carbon nanotube can filter with weak magnetic impurity and catch, and impurity removal rate is not less than 95%. Further, the hydraulic flushing assembly comprises a sixth connecting pipe communicated with the central pipeline and an ultrasonic cleaning rod inserted into the central pipeline, wherein one end of the sixth connecting pipe far away from the central pipeline is communicated with a seventh connecting pipe, a fourth valve is arranged on the outer surface of the seventh connecting pipe, a second pneumatic diaphragm pump for conveying flushing water is arranged at one end of the fourth valve far away from the seventh connecting pipe, and the magnetic and weak magnetic impurities captured on the composite screen group can be flushed by vibration throu