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Carbon-14 waste gas treatment method and system

A technology for waste gas treatment and waste gas, which is applied in the field of carbon-14 waste gas treatment methods and systems, and can solve problems such as difficult to effectively remove and difficult to avoid reflective waste gas emissions

Active Publication Date: 2018-01-05
CHINA NUCLEAR POWER TECH RES INST CO LTD +2
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  • Description
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Problems solved by technology

The content of carbon-14 gas is extremely small, at the ppm level, which is difficult to remove effectively, and it is difficult to avoid the emission of reflective exhaust gas into the nuclear power plant and its surrounding environment, which affects the health and stability of the environment

Method used

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  • Carbon-14 waste gas treatment method and system
  • Carbon-14 waste gas treatment method and system
  • Carbon-14 waste gas treatment method and system

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Embodiment Construction

[0034] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0035] The carbon-14 waste gas treatment method of the present invention is used for waste gas treatment of nuclear facilities to remove radioactive carbon-14 ( 14 C).

[0036] Such as figure 1 As shown, the carbon-14 waste gas treatment method of an embodiment of the present invention may include the following steps:

[0037] S1. Removal of H in exhaust gas 2 .

[0038] Exhaust gases usually contain N 2 、H 2 and trace amounts of CH 4 Such as carbon-14 organic matter, this step is hydrogen elimination treatment, which can be realized by hydrogen elimination unit. Specifically, refer to figure 2 , in step S1, the exhaust gas is mixed with oxygen and transported to the airtight container of the hydrogen-oxygen re...

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Abstract

The invention discloses a carbon-14-containing waste gas treatment method and system. The carbon-14-containing waste gas treatment method comprises the following steps: S1, removing H2 in waste gas; S2, converting carbon-14-containing organic matters in the waste gas into CO2; and S3, carrying out absorption treatment on the CO2. The carbon-14-containing waste gas treatment method and system disclosed by the invention are used for treating the carbon-14-containing CO2 and organic matter gas (specially low-concentration gas) and converting and absorbing the carbon-14-containing CO2 and organic matter gas; the conversion efficiency can reach 90% and above; and ppmv-grade carbon-14 matters in original waste gas can be reduced by one order of magnitude or removed, and a phenomenon that the reflexive waste gas is discharged to a nuclear power plant and the surrounding environment so that the health and stability of the environment are influenced is avoided.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant radioactive waste gas treatment, in particular to a carbon-14 waste gas treatment method and system. Background technique [0002] Carbon-14 ( 14 C) It has weak β radioactivity, the energy of β rays is 49keV, there is a risk of internal exposure, and its half-life is 5730 years. The impact of carbon-14 produced during the nuclear verification operation on the environment cannot be ignored. [0003] Taking nuclear power plants as an example, the carbon-14 exhaust gas generated in nuclear power plants is mainly discharged through the TEG hydrogen-containing subsystem. Among the exhaust gas components of the TEG hydrogen-containing subsystem, N 2 The content is about 80%, H 2 The content is about 20%, of which the carbon-14 gas concentration is between 2.9-7.4ppmv, and the hydrocarbon organic matter in the carbon-14 gas accounts for 75%-95%, CO 2 The content is 5% to 25%. The content...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F9/02
CPCG21F9/02
Inventor 周国丰董振营白杉龚有为黄永雄王超常志荣王晨阳
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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