Method and device for preheating and initially melting glass raw materials

A technology of glass raw materials and glass particles, which is applied in the field of nuclear applications, can solve the problems of high cost, long time consumption, and high energy consumption, and achieve the effects of less smoke, low cost, and large heat release

Inactive Publication Date: 2019-05-10
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the inventors have found that in the prior art, additional heating equipment is required for the cold crucible to pre

Method used

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  • Method and device for preheating and initially melting glass raw materials
  • Method and device for preheating and initially melting glass raw materials

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Embodiment 1

[0030] This embodiment provides a method for preheating and starting melting of glass raw materials, and specifically relates to a new start-up method for cold crucible vitrification technology for radioactive waste liquid, so as to achieve smooth start-up of cold crucible equipment, and is suitable for using cold crucible vitrification technology When processing radioactive waste, the melting of the glass material is initiated.

[0031] Such as figure 1 As shown, the preheating and starting method includes the following steps S101 to S103.

[0032] S101. Evenly place the glass particles inside the cold crucible furnace body, then place the conductor heating body on the glass particles, and place the induction coil outside the cold crucible furnace body;

[0033] S102. Start a high-frequency power supply electrically connected to the induction coil to generate a high-frequency electromagnetic field;

[0034] S103. Gradually increase the output power of the high-frequency pow...

Embodiment 2

[0048] This embodiment provides a glass raw material preheating start-up device, specifically related to a new type of starting device for radioactive waste liquid cold crucible vitrification technology, so as to realize the smooth start of cold crucible equipment, and is suitable for using cold crucible vitrification technology When processing radioactive waste, the melting of the glass material is initiated.

[0049] Such as figure 2 As shown, the preheating and starting device includes: a cold crucible 1, a conductor heating body 3, an induction coil 2 and a high frequency power supply (not shown in the figure). The furnace body of the cold crucible 1 contains glass particles 4, and the glass particles 4 are uniformly placed in the furnace body of the cold crucible. The conductor heating body 3 is placed on the glass granules 4 . The induction coil 2 is set on the outside of the furnace body of the cold crucible 1 . The high-frequency power supply is electrically connec...

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Abstract

The invention provides a method and device for preheating and melting glass raw materials. The preheating and initially melting method comprises the following steps: placing glass particles inside a cold crucible furnace body, placing a conductor heating body on the glass particles, and sleeving the cold crucible furnace body with an induction coil; starting a high-frequency power supply electrically connected with the induction coil to generate a high-frequency electromagnetic field; gradually increasing the output power of the high-frequency power supply, so that the conductor heating body in a cold crucible is gradually heated up under the action of the high-frequency electromagnetic field until the conductor heating body burns and releases a large amount of heat, thereby melting glassparticles after absorbing the heat and forming a molten pool, wherein the molten pool is continuously expanded until all glass particles in the cold crucible are completely molten. According to the invention, the conductor heating body is arranged on the glass particles in the cold crucible as a starting material, and the conductor heating body is rapidly heated up and burned under the action of ahigh-frequency electromagnetic field, so that the released heat not only forms the glass molten pool, but also accelerates the whole starting process, and no additional heating equipment is needed for the cold crucible.

Description

technical field [0001] The invention relates to the technical field of nuclear applications, in particular to a method for preheating and starting a glass raw material, and a device for preheating and starting a glass raw material. Background technique [0002] In the process of nuclear energy utilization, it is necessary to properly dispose of a large amount of radioactive waste, especially high-level radioactive liquid waste, so as to minimize its impact on the environment. The usual practice is to reduce the volume of these radioactive wastes and solidify them, and then bury them in deep geological disposal sites far away from the human living circle. Among them, the cold crucible vitrification technology is one of the currently used solidification technologies. Its basic principle is to use high-frequency induction heating to melt the calcined radioactive waste liquid and the glass material to form a vitrified body. Because this kind of solidified waste has good chemica...

Claims

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Application Information

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IPC IPC(8): C03B5/02C03B5/033C03B5/16
Inventor 李玮吴华刘存银谢轶男张俊峰郭和一贾云全颜迎春张威
Owner CHINA NUCLEAR POWER ENG CO LTD
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