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Device and method for continuously generating iodine vapor

A technology of iodine vapor and working gas, which is applied in the field of devices that continuously generate iodine vapor, can solve problems such as iodine powder agglomeration, achieve constant specific surface area, ensure stable operation, and avoid a large amount of overflow

Active Publication Date: 2019-12-06
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0003] Aiming at the problems of the currently used iodine vapor production method, the purpose of the invention is to provide a method and device for continuously generating iodine vapor, so as to obtain continuous and stable iodine vapor and solve the problem of caking of iodine powder during heating

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  • Device and method for continuously generating iodine vapor

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, a device for continuously generating iodine vapor provided by the present invention includes heating equipment, U-shaped pipe 2, working gas input equipment, input pipeline 11, output pipeline 12 and sampling pipeline 13.

[0023] One end (input end) of the U-shaped pipe 2 is connected to the working gas input device through the input pipeline 11, and the other end is the gas output end, which is connected to the output pipeline 12; In the heating equipment; the U-shaped section is filled with a mixture composed of iodine powder and porous materials, and the mixture can generate iodine vapor after being heated. The porous material is glass ball or capillary or zeolite with holes.

[0024] The working gas input device includes a gas cylinder 4 , a pressure reducing valve 5 and a first gas flow meter 6 . The gas cylind...

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Abstract

The invention belongs to the technical field of nuclear fuel post-treatment, and particularly relates to a device and method for continuously generating iodine vapor. The device for continuously generating the iodine vapor includes a U-shaped pipe (2), wherein one end of the U-shaped pipe is connected to a working gas input device, and the other end is used as a gas output end; two ends of the U-shaped pipe (2) face upwards, and a U-shaped section of the U-shaped pipe (2) is arranged in a heating device; and the U-shaped section is filled with a mixture composed of iodine powder and a porous material, and the mixture can generate the iodine vapor after being heated. The device and method provided by the invention solve the problem of agglomeration caused by interaction between iodine molecules due to a too high local iodine concentration during the production of iodine vapor, and can generate the continuous and stable iodine vapor and ensure the stable operation of a simulated iodine-containing tail gas experiment.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel reprocessing, and in particular relates to a device and method for continuously generating iodine vapor. Background technique [0002] Iodine is an important fission product element in spent reactor fuel, and it has many isotopes, among which 129 I is a long-lived radionuclide because of its long half-life (1.57×108 years). In spent fuel with a burnup of 3.3GW / dtU, 129 I is about 270g / tU (1.388×109Bq / tU), and the content increases with the increase of fuel consumption. Iodine enters the exhaust gas treatment system during spent fuel reprocessing. because 129 I's strong radioactivity, long half-life, and high mobility in the environment require the capture and adsorption of iodine to meet the exhaust emission standards. In the process of carrying out iodine capture and adsorption research, it is necessary to simulate iodine-containing tail gas. The current common method is to place iodine...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/00G21F9/02
CPCG21C17/001G21F9/02Y02E30/30
Inventor 兰天袁中伟晏太红
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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