Research On High Efficient Activated Carbon Adsorption Technology Of Radon

222Rn is a natural radioactive gas mainly to cause radiation hazards for human beings, the dose contributions of Radon daughters accounted for 48% of the total natural radiation dose of residents, and indoor radon and its daughters accounts about 42%. In bad effective ventilation and high radon concentration underground construction, radon and its daughters harm greater.Passive radon reduction measures such as reducing radon precipitation, air purification and natural ventilation and other ways show better effect in a small area, but there are still exist some problems such as a small amount of processing, the slow processing speed, the non-ideal treatment effect and so on. In some environments requiring fast and bulk processing radon and other inert radioactive gases, large active treatment device is necessary,for example, nuclear power plants, mines and large underground facilities. At home and abroad,the most effective way to reduce radon is ventilation, and this technology applied widely in mine. But due to some reasons include technical difficulty or big cost, ventilation for radon reduction apply for some underground facilities where are ventilated inconvenient or not be fully ventilated, this method becomes undesirable. Because of the activity carbon has the good adsorbability of radon, it is suitable for large quantities of adsorbing radon in the local area of ground.Compared with the same type products abroad, equipments of our country for removing radon based on activated carbon adsorption technique existing disadvantages which is Small amount of adsorption and the low adsorption efficiency.In this paper, combined with previous experimental and theoretical studies of dynamic adsorption coefficient of radon gas by activated carbon, the main factors influencing the carbon adsorption radioactive inert gas was analyzed and discussed. On this basis,a efficient active carbon adsorption device was made.Use activated carbon adsorption of radon with high-pressure devices, the concentration of radon is about 2000 Bq / m3, simulated six environment of carbon adsorption, measuring the dynamic adsorption coefficient of radon. Experimental results show that the relative humidity, pressure and temperature of adsorption systems are the main factors affecting carbon adsorption radon, the flow rate almost did not affect the adsorption coefficient. increasing the system pressure, reduce the relative humidity and temperature of adsorption, the dynamic adsorption of activated carbon adsorption coefficient of radon has been improved, the dynamic adsorption coefficient of high-pressure 、low temperature and humidity state(6atm, 0 ℃, 20-24%) is 5 times of the atmospheric pressure 、normal temperature and humidity state(1atm, 28 ℃, 54%-65%).