Preparation method of graphite surface pyrolytic carbon coating for molten salt reactor

A technology of molten salt reactor and pyrolysis carbon, which is applied in reactors, manufacturing reactors, carbon preparation/purification, etc., can solve the problems of high cost, long preparation cycle, unfavorable large-scale application, etc., and achieve low porosity and compactness The effect of high density and small average pore size

Inactive Publication Date: 2018-04-06
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, some people have adopted the chemical vapor deposition method (CVD method), but this method has a long preparation cycle and high cost, which is not conducive to large-scale application.

Method used

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  • Preparation method of graphite surface pyrolytic carbon coating for molten salt reactor
  • Preparation method of graphite surface pyrolytic carbon coating for molten salt reactor
  • Preparation method of graphite surface pyrolytic carbon coating for molten salt reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Prepare phenolic resin impregnation solution: mix thermosetting phenolic resin and absolute ethanol at a volume ratio of 0.5:1, put it in a water bath while heating and stirring until the resin is completely dissolved, and keep it at a constant temperature of 50°C for use.

[0043] 2. After drying the nuclear graphite IG-110 component, place it in the impregnation equipment, raise the temperature to 60°C, keep the temperature constant and start vacuuming to keep the internal pressure of the impregnation chamber at 0.01MPa, and continue vacuuming for 1h.

[0044] 3. Add thermosetting phenolic resin dispersion liquid to the impregnation equipment (it must be ensured that the liquid level of the thermosetting phenolic resin dispersion liquid is 15mm higher than the top of the nuclear graphite component after the pressurization), and then pass high-pressure inert gas into the impregnation equipment to pressurize to 0.5 MPa, maintain a constant high pressure for 5 hours, t...

Embodiment 2

[0052] 1. Prepare phenolic resin impregnating solution: Mix thermosetting phenolic resin and absolute ethanol at a volume ratio of 1:1, put it in a water bath while heating and stirring until the resin is completely dissolved, and keep at a constant temperature of 60°C for use.

[0053] 2. After drying the nuclear graphite IG-110 component, place it in the impregnation equipment, raise the temperature to 70°C, keep the temperature constant and start vacuuming to keep the internal pressure of the impregnation chamber at 0.01MPa, and continue vacuuming for 2 hours.

[0054] 3. Add thermosetting phenolic resin dispersion liquid into the impregnation equipment (it must be ensured that the liquid level of the thermosetting phenolic resin dispersion liquid is 10mm higher than the top of the nuclear graphite member after the pressurization), and then pass high-pressure inert gas into the impregnation equipment to pressurize to 5MPa , keep a constant high pressure for 4 hours, take out...

Embodiment 3

[0061] 1. Prepare phenolic resin impregnating solution: mix thermosetting phenolic resin and absolute ethanol at a volume ratio of 1.5:1, put it in a water bath while heating and stirring until the resin is completely dissolved, and keep at a constant temperature of 70°C for use.

[0062] 2. After drying the nuclear graphite IG-110 component, place it in the impregnation equipment, raise the temperature to 65°C, keep the temperature constant and start vacuuming to keep the internal pressure of the impregnation chamber at 0.01MPa, and continue vacuuming for 3 hours.

[0063] 3. Add thermosetting phenolic resin dispersion liquid to the impregnation equipment (it must be ensured that the liquid level of the thermosetting phenolic resin dispersion liquid is 15mm higher than the top of the nuclear graphite member after the pressurization), and then pass high-pressure inert gas into the impregnation equipment to pressurize to 6MPa , maintain a constant high pressure for 4 hours, take...

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Abstract

The invention discloses a preparation method of a graphite surface pyrolytic carbon coating for a molten salt reactor. The preparation method comprises the steps: adding thermosetting resin into a solvent to be dissolved to prepare a thermosetting resin dispersion liquid; vacuumizing a nuclear graphite member in impregnation equipment; adding the thermosetting resin dispersion liquid into the impregnation equipment, and carrying out impregnation and drying in the existence of high-pressure inert gases; and after drying, carrying out solidification under pressure and roasting treatment on the impregnated nuclear graphite member at an inert atmosphere to obtain a nuclear graphite member coated by a pyrolytic carbon coating. The preparation method has the advantages of simple process, low cost and large-scale production.

Description

technical field [0001] The invention belongs to a method for manufacturing a graphite coating, in particular to a method for preparing a pyrolytic carbon coating on a graphite surface for a molten salt reactor. Background technique [0002] With the development of economy and society, the contradiction between the increasing energy demand of human beings, the depletion of conventional fossil energy and the relative scarcity of renewable energy has gradually intensified. Under such circumstances, the liquid molten salt reactor, an important candidate for the fourth-generation nuclear reactor, came into being, and has rapidly become a nuclear reactor due to its inherent safety, effective use of nuclear resources, prevention of nuclear proliferation, fuel cycle, and economy. A major research hotspot. [0003] Nuclear graphite has the advantages of low neutron absorption cross section, high moderator ratio, high thermal conductivity and excellent mechanical properties, and can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C21/00G21C21/18C01B32/21C01B32/05
CPCG21C21/00G21C21/18Y02E30/30
Inventor 刘占军何钊连鹏飞宋金亮郭全贵张俊鹏
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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