SU762619A1 - Arrangement for cleaning helium heat carrier of high-temperature gas-cooled reactors - Google Patents

Description

The invention relates to the field of purification of helium coolant of high-temperature gas-cooled reactors and can be and can be used in magnetohydrodynamic, laser and thermonuclear installations.

Known installation for the separation of harmful substances from the gases of a nuclear power plant, which contains a filter of activated carbon, in front of which a filter is installed to remove substances in suspension, and before this filter another filter of activated carbon is installed.

Hydrogen oxidation does not occur in this installation during gas cleaning

fuel fission products, a block of zeolitic fipy.trov to remove water vapor from carbon dioxide and an adsorber with an activated carbon packing, cooled with liquid nitrogen to remove long-lived xenon, krypton, nitrogen and methane isotopes, characterized in that, in order to increase the cleaning efficiency and reducing the temperature mode of the process, between the zeolite filter unit and the adsorber is placed a filter unit with a zeolite nozzle in silver form to remove carbon monoxide and a unit with a nozzle from the PA. bent for removing vodroda.

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and carbon monoxide to water, remove carbon dioxide, and oxygen. The closest in technical essence and the achieved result is a known method of processing radioactive inert gas, which consists in that the inert gas is fed into the device containing an absorber, after which the concentrated inert gas is introduced into the device to remove oxygen and impurities. The radioactive inert gas, cleared of impurities, is cooled and accumulated in a gas-holder, from where it is sent to cylinders cooled with liquid nitrogen to low temperatures. In cylinders, it is sealed and stored at room temperature.

$ Ц 762619

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762619

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This method does not contain operations for the removal of impurities of hydrogen and carbon monoxide from the inert gas.

The purpose of the invention is to increase the cleaning efficiency of the coolant and reduce the temperature of the process.

The goal is achieved by opi. device for cleaning helium coolant of high-temperature gas-cooled reactors containing successively a delay block with an activated carbon nozzle to remove short-lived xenon isotopes, krypton and fission products, a zeolite filter unit to remove Water Vapor and carbon dioxide and an adsorber with activated nozzle coal cooled with liquid nitrogen to remove long-lived isotopes of xenon, krypton, nitrogen and methane, and between the block of zeolite filters and the adsorber, n block of filters with a nozzle of zeolite in silver form to remove carbon monoxide and a block with a nozzle of a palladated sorbent for the removal of hydrogen.

Distinctive features of the device is the installation between the zeolite filter unit and the adsorber of the filter unit with a nozzle of zeolite in silver form and a unit with a nozzle of palladated sorbent.

The drawing shows a diagram of the device.

The device contains a delay unit 1 with an activated carbon nozzle.

ten

20

25

thirty

nozzle for cold water

poi and fuel fission products unit

• 2 zeolitic filters to remove water vapor and carbon dioxide, block
• 3 filters with a nozzle of zeolite in silver form to remove carbon monoxide, a block of 4 filters with activated hydrogen sorbent and an adsorber 5 of activated carbon

liquid nitrogen to remove long-lived xenon, krypton, nitrogen and methane isotopes.

The device works as follows.

The removal of impurities from helium in blocks of 1-4 filters is carried out at 20–20 ° C, the regeneration of the filters is carried out by heating the filter head to 400 ° C with blowing the nozzle layer with pure helium, followed by evacuation.

Thanks to the use of the described device, a more efficient cleaning of the coolant has been achieved and the temperature mode of operation of the device has been reduced, i.e. cleaning in all. filters, except the adsorber, is carried out at the same temperature conditions of 20 ° C.

The described device allows an explosion-proof cleaning process, since hydrogen and oxygen are not used for filter regeneration. The number of heat exchange equipment decreases and the need for the use of regenerative gases, hydrogen and oxygen, is eliminated, which reduces capital

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Claims (1)

DEVICE FOR CLEANING HELIUM HEAT CARRIER OF HIGH-TEMPERATURE GAS-COOLED REACTORS, containing successively installed delay unit with an activated carbon packing to remove short-lived xenon isotopes, krypton and one