Radioactive gas purification device

Abstract

The invention provides a radioactive gas purification device, which has characteristics of high efficiency and high reliability, can fully achieve the effect of a filter, prolong the maintenance period of equipment and reduce the operation cost, and comprises a filtering device, wherein the filtering device comprises an active carbon fiber adsorber, a filter, a table frame, a primary filtering device, a heating and dehumidifying device and a control device, the control device adopts a PLC controller, the primary filtering device, the heating and dehumidifying device and the filtering device are sequentially connected and are supported on the table frame, the primary filtering device adopts a filtering layer filter, the heating and dehumidifying device adopts a tubular heat exchanger, the tubular heat exchanger is connected between the filtering layer filter and the active carbon fiber adsorber, a first temperature and humidity sensor in control connection with the PLC controller is arranged in the tubular heat exchanger, the filtering device further comprises a centrifugal fan in control connection with the PLC controller, the filter comprises a medium-efficiency filter and a high-efficiency filter, and the active carbon fiber adsorber, and the medium-efficiency filter, the high-efficiency filter and the centrifugal fan are sequentially connected.

Description

technical field [0001] The invention relates to the technical field of polluted gas treatment, in particular to efficient and reliable purification of radioactive gases, in particular to a purification device for radioactive gases. Background technique [0002] At present, nuclear power plants, national defense projects, nuclear laboratories and other facilities are in working condition, and a large amount of radioactive aerosols, radioactive aerosols, solid or liquid particles containing radionuclides suspended in the air or other gases will be produced in their environment , will cause environmental pollution and personnel will be irradiated. In order to effectively control the hazards of airborne radioactive pollutants and ensure that the staff are always in a clean and safe environment, it is necessary to process radioactive gases, and therefore radioactive gas purification devices have emerged . [0003] At present, the purification device of radioactive gas is divided...

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Problems solved by technology

[0003] At present, the purification device of radioactive gas is divided into two types according to different processes: activated carbon adsorber plus high-efficiency filter type and solution degradation type, activated carbon adsorber plus high-efficiency filter type such as: Chinese patent CN 208332486U discloses a radioactive gas The air purification device is composed of a body shell, an air outlet, an automatic radiation monitoring alarm, an activated carbon fiber adsorber, an electric control device, a high-efficiency filter, an air inlet and a ladder wheel, and the gas passes through the air inlet through the activated carbon fiber adsorber. The gas is adsorbed and finally filtered through a high-efficiency filter; the device can be used to filter the gas, and a radiation alarm system can be installed to monitor the filtering situation, and the structure is compact, but this device does not carry out aerosol Considering that this will lead to clogging of activated carbon fiber adsorbers and high-efficiency filters, reducing efficiency and requiring constant replacement of filter elements, the cost is high, and it is not suitable for efficient and reliable purification requirements

[0004] The solution degradation formula is as in the Chinese patent CN101441903A, which consists of a degradation tank and a filter tank. By extending the intake pipe of the radioactive gas into the solution, the filter tank is degraded step by step, and then discharged through the final ventilation cap; The device is simple in structure, easy to use, low in manufacturing cost, and can remove radioactive particles very well. However, since the device is filtered and degraded by the solution and then passed through the filter material, the water content of the filtered gas is relatively high, which will shorten the use of the filter element. Longer service life, increased cost, and when the gas volume is insufficient, it is impossible to filter all the gas in the tank, resulting in residual gas

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