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Method and system for treating radioactive organic waste using three-phase fluidized bed

A three-phase fluidized bed and organic waste technology, applied in the field of nuclear chemical industry, to achieve good application prospects, clean tail gas, and stable final products

Active Publication Date: 2021-05-28
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The object of the present invention is to provide a method and system for treating radioactive organic waste using a three-phase fluidized bed, to solve the defects in the prior art for the treatment of organic radioactive waste, to realize the treatment of various radioactive organic waste, and to achieve a greater degree of The purpose of reducing the volume and mineralizing the unstable polluting nuclides contained in it

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  • Method and system for treating radioactive organic waste using three-phase fluidized bed

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Embodiment 1

[0059] This embodiment includes the following steps:

[0060] (a) Fill fluidized base material, catalyst in three-phase fluidized bed;

[0061] (b) Pass the radioactive organic waste into the three-phase fluidized bed, and simultaneously pass the metal ion mineralizer, superheated steam, charcoal, and air;

[0062] (c) The radioactive metal ions in the radioactive organic waste undergo a mineralization containment reaction in the fluidized bed reaction section to generate mineralized products that contain the nuclides;

[0063] (d) The organic components in radioactive organic waste undergo steam reforming reaction in the fluidized bed reaction section to produce combustible small molecular gas;

[0064] (e) Separation of mineralized products.

[0065] The radioactive organic waste includes one or more of solids, liquids, and resins; the solids are technical wastes, which are sequentially sorted, cut, crushed, and pressed, and put into the fluidized bed reaction section; the...

Embodiment 2

[0069] The system equipment includes: a fluidized bed inlet section 1, a fluidized bed reaction section 2, and a fluidized bed expansion section 3. A steam inlet 4 is arranged in the inlet section 1 of the fluidized bed. A steam gas distributor 15 is set to separate the fluidized bed inlet section 1 and the reaction section 2, and is used to evenly distribute the steam generated by the steam generator 14 and superheated by the steam superheater 18 entering through the steam inlet 4, Provide a stable source of fluidizing gas for the fluidized bed. A waste liquid atomization distributor 19 , a technical waste feeder 6 , a resin feed port 5 and an electric heater 7 are arranged in the fluidized bed reaction section 3 .

[0070] The waste resin comes from the waste resin storage tank 13, and is transported to the resin feed port 5 through the resin feeding pump 17. Under the action of superheated steam, the fluidized state is realized in the fluidized bed reaction section 3, and ...

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Abstract

The invention discloses a method and a system for treating radioactive organic waste by utilizing a three-phase fluidized bed, comprising the following steps: (a) filling a fluidized substrate and a catalyst in the three-phase fluidized bed; (b) passing the radioactive organic waste through into the three-phase fluidized bed, and at the same time, metal ion mineralizer, superheated steam, charcoal, and air are introduced; (c) the radioactive metal ions in the radioactive organic waste undergo mineralization and containment reaction in the fluidized bed reaction section to generate Mineralization products, including nuclides; (d) The organic components in the radioactive organic waste are subjected to steam reforming reaction in the fluidized bed reaction section to produce combustible small molecular gas; (e) The mineralization products are separated. The invention is used to solve the defects of the organic radioactive waste treatment methods in the prior art, realize the treatment of various types of radioactive organic wastes, realize a large degree of volume reduction, and mineralize and contain the unstable pollution nuclides contained therein. the goal of.

Description

technical field [0001] The invention relates to the field of nuclear chemical industry, in particular to a method and system for treating radioactive organic waste by using a three-phase fluidized bed. Background technique [0002] During the operation and maintenance of nuclear reactors, a large amount of radioactive solid waste will inevitably be generated, including: ion exchange resins, activated carbon, filter elements, sludge, waste oil, waste organic solvents, and labor protection supplies, plastic cloths, wipes, etc. Decontamination supplies, etc. Most of these wastes are organic wastes, and conventional physical methods can only achieve waste conditioning in the short term, but cannot guarantee long-term disposal safety. Although new nuclear power plants have made some improvements in the introduction of waste treatment technologies, such as trying some new technologies for resin treatment, they still have not fundamentally solved the goals of safe waste treatment ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/16G21F9/30G21F9/06G21F9/20G21F9/34
CPCG21F9/06G21F9/162G21F9/20G21F9/30G21F9/302G21F9/34
Inventor 林力章航洲李文钰祝杰骆枫梁毅马兴均张劲松陈莉李振臣陈先林高峰段治强刘文磊廖俊喃
Owner NUCLEAR POWER INSTITUTE OF CHINA
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