Carbon microsphere cleaning device and method

A technology of carbon microspheres and equipment, which is applied in the field of coking, can solve the problems that the centrifuge cannot be operated in a closed manner, reduce the product yield, increase the amount of solvent, etc., and achieve the effect of eliminating the risk of fire and personnel health and improving the yield

Inactive Publication Date: 2019-10-08
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, manufacturers mainly use centrifuges for solvent washing, but this process can only be cleaned by simply increasing the amount of solvent during operation.
Increasing the amount of solvent will take away a large amount of carbon microspheres during the washing process, reducing the product yield
Moreover, the centrifuge cannot be operated in a closed manner during the production process, and a large amount of flammable and toxic solvents remain, which is harmful to the health of the operators.

Method used

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  • Carbon microsphere cleaning device and method
  • Carbon microsphere cleaning device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix 1 ton of carbon microspheres with 3 tons of washing oil, heat to 130°C, and then stir for 2 hours to form a mother liquor. The tank (1) is filled with the mother liquor, and low-pressure steam (0.3MPa) is introduced for pressure filtration, and the liquid is discharged after filtering for 2 hours. Add washing oil at 120°C, cycle and wash for 2 hours, and drain the washing oil. Add toluene at 20°C, circulate and wash for 2h, and then discharge the toluene. Finally, drying was carried out with nitrogen at 120°C.

Embodiment 2

[0034] Mix 1.2 tons of carbon microspheres and 4.5 tons of washing oil, heat to 120°C, and then stir for 2 hours to form a mother liquor. The mother liquor is filled with the decanting body (1), and nitrogen gas (0.5MPa) is introduced for pressure filtration, and the liquid is discharged after filtering for 3 hours. Add washing oil at 130°C, circulate and wash for 3 hours, and drain the washing oil. Add toluene at 30°C, circulate and wash for 3h, and then discharge the toluene. Finally, it is dried with steam at 100°C.

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Abstract

The invention provides a carbon microsphere cleaning device and method. The carbon microsphere cleaning device comprises a tank and a filter element arranged in the tank. The upper portion of the tankis provided with a gas inlet. The lower portion of the tank is provided with a mother liquid inlet. The bottom of the tank is provided with a finished product outlet. The filter element comprises a combined filter screen composed of multiple layers of metal nets and a filter element pipeline arranged in the center of the filter element. Mother liquid is filled into the tank through the mother liquid inlet on the lower portion. Inert gas or water vapor is introduced through a gas inlet on the upper portion. At the moment, carbon microspheres are attached to the surface of the filter element. The carbon microspheres are retained on the surface of the filter element through the metal nets of 20 meshes-40 meshes, and liquid can pass through the filter element. The liquid is retained in the filter element through the metal nets of 100 meshes-150 meshes. Gas passes through the filter element and gets away from the filter element to keep going downwards. The carbon microsphere cleaning device is adopted to completely replace centrifugal machine operation and increases the carbon microsphere yield by 20%. The moisture percentage (the solvent content) is lower than 2%. The carbon microsphere cleaning device adopts totally-enclosed operation. The content of methylbenzene vapor and the content of washing oil vapor in an operating space are zero. The risk of fire and personnel health is eradicated.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a device and method for cleaning carbon microspheres. Background technique [0002] Carbon microspheres are a kind of carbon material with a layered structure produced by pitch polymerization. Due to its high degree of graphitization, stable structure, and excellent electrochemical performance, it is currently widely used in the power battery industry as an anode material. Compared with traditional anode materials, carbon microspheres have obvious advantages in rate performance. In 2017, the market share increased to 38%, which is the second largest anode material after artificial graphite. [0003] In the process of large-scale industrial production of carbon microspheres, it is necessary to wash the carbon microspheres from the pitch with a solvent. At present, manufacturers mainly use centrifuges for solvent washing, but this process can only be cleaned simply by increasing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B3/08B08B13/00B01D29/50
CPCB01D29/50B08B3/08B08B13/00
Inventor 张展张大奎刘雪松
Owner ANGANG STEEL CO LTD
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