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Ultrahigh-pressure supercritical carbon dioxide current-carrying dry ice cutting device and method

A carbon dioxide and cutting device technology, applied in the field of decommissioning of nuclear facilities, can solve the problems of increased secondary waste, low cutting efficiency, and increased decommissioning funds, achieving significant economic and social benefits, reducing the amount of secondary waste, The effect of saving disposal costs

Pending Publication Date: 2019-07-09
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mechanical cold cutting methods such as diamond wire saws and circular saws have low cutting efficiency and use more consumables; high-pressure water jet cutting and underwater plasma cutting will generate a large amount of secondary waste water; oxyacetylene torch cutting will generate a large amount of radioactivity aerosol
At the decommissioning site, the increase in the amount of secondary waste will directly lead to an increase in decommissioning funds

Method used

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  • Ultrahigh-pressure supercritical carbon dioxide current-carrying dry ice cutting device and method
  • Ultrahigh-pressure supercritical carbon dioxide current-carrying dry ice cutting device and method

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Embodiment Construction

[0036] An ultra-high pressure supercritical carbon dioxide streaming dry ice cutting device and method provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as figure 1 As shown, a cutting device for ultra-high pressure supercritical carbon dioxide streaming dry ice provided by the present invention includes an industrial gas cylinder 1, a supplementary pump 2, a storage tank 3, a dry ice granulator 4, a dry ice crusher 5, a vibrating screen 6, Funnel 7, booster pump 8, heater 9, negative pressure shroud 10, jet cutting device 11, dryer 12, recovery pump 13, two-stage filter 14, cutting and dismantling parts 15;

[0038] The industrial gas cylinder 1 is connected to the storage tank 3 through the supplementary pump 2, the storage tank 3 is connected to the dry ice granulator 4 and the booster pump 8 at the same time, the dry ice granulator 4 is connected to the dry ice c...

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Abstract

The invention belongs to the technical field of nuclear facility decommission and particularly relates to an ultrahigh-pressure supercritical carbon dioxide current-carrying dry ice cutting method. The method comprises the following steps that 1, supercritical carbon dioxide is prepared; 2, ultrahigh-pressure supercritical carbon dioxide current-carrying dry ice is sprayed; and 3, carbon dioxide is recycled. According to the method, cutting and disintegrating of metal rubbish on the nuclear facility decommission site can be achieved, the cutting efficiency is improved, the treatment amount ofsecondary radioactive waste is reduced, and safety of personnel, the public and environment is ensured.

Description

technical field [0001] The invention belongs to the technical field of decommissioning of nuclear facilities, and in particular relates to a device and method for cutting ultrahigh-pressure supercritical carbon dioxide flow-borne dry ice. Background technique [0002] During the on-site implementation of decommissioning of nuclear facilities, whether it is the dismantling of equipment or the disintegration of dismantled items, radioactive cutting operations are involved. For example, in the decommissioning process of nuclear power plants, the cutting and dismantling of reactor pressure vessels, the cutting and dismantling of the main pipeline of the primary circuit system, etc. At present, the commonly used cutting methods are mainly divided into cold cutting and hot cutting. Among them, cold cutting technology mainly includes diamond wire saw, circular saw, high-pressure water jet cutting, etc.; thermal cutting technology mainly includes underwater plasma cutting, oxyacety...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P17/02
CPCB23P17/02
Inventor 滕磊戴波张良张永领隆涛陈旭敏文静张慧吴鹏程周彦伟
Owner NUCLEAR POWER INSTITUTE OF CHINA
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