Underground engineering radon gas adsorption treatment apparatus

Abstract

The invention relates to the technical field of gas adsorption, and discloses an underground engineering radon gas adsorption treatment apparatus, which comprises active carbon beds for radon adsorption or radon desorption, and an air compressor for feeding radon-containing air into the active carbon bed, at least the two active carbon beds are arranged, a throttle valve is arranged between the adjacent active carbon beds, and gas discharge pipelines are connected to the connecting pipelines between each end portion of the throttle valve and the active carbon beds. According to the present invention, after radon-containing air is compressed, the compressed radon-containing air is fed into one or a plurality of the active carbon beds through the electromagnetic valve so as to be subjected to radon gas adsorption; part of the air discharged from the active carbon bed performing radon gas adsorption is discharged through the gas discharge pipeline, and another part enters the adjacent oneor a plurality of the active carbon beds through the throttle valve so as to be subjected to radon desorption; the gas discharged from the active carbon bed performing radon desorption is fed into the compression device through the electromagnetic valve so as to be pressurized, and the other end of the compression device is provided with the active carbon bed used for pressurizing storage and capable of decaying the radon gas; and the gas is subjected to radon decaying by the active carbon bed used for pressurizing storage, and then is directly discharged to the outside world.

Description

technical field [0001] The invention belongs to the technical field of gas adsorption, and in particular relates to an underground engineering radon gas adsorption treatment device. Background technique [0002] At present, the adsorption of radon in the air of underground engineering generally adopts the physical adsorption method, and the unit of radon concentration in the air is Bq / m 3 , which represents the number of radon atoms that undergo radioactive decay in one cubic meter of air in one second, and there are about 2.68×10 in one cubic meter of air 25 molecules, so even the higher radon concentration of 10000 Bq / m 3 Radon-containing air, the ratio of the number of radon atoms to the number of air molecules is also very small, and the air radon concentration in the living environment is reduced to the prescribed action level of 200-400 Bq / m 3 , a large amount of activated carbon is required to effectively capture and adsorb radon atoms and achieve the expected treat...

AI Technical Summary

Problems solved by technology

[0002] At present, the adsorption of radon in the air of underground engineering generally adopts the physical adsorption method, and the unit of radon concentration in the air is Bq / m 3 , which represents the number of radon atoms that undergo radioactive decay in one cubic meter of air in one second, and there are about 2.68×10 in one cubic meter of air 25 molecules, so even the higher radon concentration of 10000 Bq / m 3 Radon-containing air, the ratio of the number of radon atoms to the number of air molecules is also very small, and the air radon concentration in the living environment is reduced to the prescribed action level of 200-400 Bq / m 3 , a large amount of activated carbon is required to effectively capture and adsorb radon atoms and achieve the expected treatment effect. In addition, activated carbon can also adsorb gases such as nitrogen in addition to adsorbing radon, which further leads to low treatment efficiency of activated carbon physical adsorption.

[0003] Activated carbon physically adsorbs radon gas, which belongs to the van der Waals force between molecules. It has problems such as easy saturation, easy desorption, and secondary pollution. In addition, radon decay will release radioactive radon daughters, which will be released after being inhaled by the human body. Internal radiation is formed on the human body, so the activated carbon physical adsorption method cannot completely treat radon gas and its progeny

[0004] Radon gas is a radioactive gas with a half-life of 3.82 days. Therefore, after activated carbon absorbs radon, it needs to be stored for 3-4 half-lives. After the decay is complete, it can be safely desorbed and discharged. At present, the decay efficiency of activated carbon storage is not high.

Images