Method for separating and purifying xenon in atmosphere by use of active carbon and device thereof

A technology of separation and purification, activated carbon, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, which can solve problems such as complex operating conditions, increased device complexity and operational difficulty, and long time required for activation of carbon molecular sieves. The operating conditions are simple, the method is simple, and the effect of the impurity removal device is reduced

Active Publication Date: 2012-06-13
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

The xenon and radon gases used in this method are high-concentration standard gases, which cannot directly process air samples with complex gas components; the separation device uses five-stage adsorption columns and two ...

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  • Method for separating and purifying xenon in atmosphere by use of active carbon and device thereof
  • Method for separating and purifying xenon in atmosphere by use of active carbon and device thereof
  • Method for separating and purifying xenon in atmosphere by use of active carbon and device thereof

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Embodiment Construction

[0032] according to figure 1 According to the connection relationship shown, an experimental device for separating and purifying xenon in the atmosphere by activated carbon is established.

[0033] The method and device for separating and purifying xenon in the atmosphere by using activated carbon in the present invention utilizes a four-stage activated carbon adsorption column to perform adsorption and desorption of gas, controls the temperature of the activated carbon adsorption column, and utilizes the difference in desorption temperature of different substances to realize xenon, carbon dioxide and radon separation. The concentration of carbon dioxide in the final sample is lower than 50ppm, and the decontamination factor of radon reaches 10 5 .

[0034] Among them: the device consists of four different sizes of adsorption columns filled with activated carbon, a heater, a temperature controller, a carrier gas cylinder, a gas mass flow controller, and a sample collection b...

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Abstract

The invention relates to a method for separating and purifying xenon in the atmosphere by the use of active carbon and a device thereof. The method comprises the following steps of: adsorbing xenon in the air by using active carbon, collecting gases during the xenon desorption period by the utilization of desorption temperature difference of different substances on active carbon, separating foreign gases such as carbon dioxide, radon and the like, carrying out gradual enrichment and purification through a four-grade adsorption column, and concentrating and collecting the gas into a small container. According to the invention, separation and purification are carried out by the utilization of the desorption temperature difference of xenon and the foreign gases on the active carbon adsorption column, and adsorption, separation and purification are all carried out on the active carbon column so as to reduce a separate impurity removing device. The method is simple. The device provided by the invention can be used to monitor a nuclear power plant, a nuclear reactor, nuclear waste treatment, medical facility leakage and radioactive xenon isotope releasing, and is also used for monitoring the atmospheric nuclear environment.

Description

technical field [0001] The invention relates to the separation and purification of rare gases. Activated carbon is used as the adsorbent to fill the adsorption column. Substances such as xenon, radon and carbon dioxide in the atmosphere are adsorbed in the activated carbon adsorption column. The different desorption temperatures of different substances on the activated carbon are used to control different The heating rate removes impurity gases such as carbon dioxide and radon, realizes the separation and purification of xenon, and provides technical services for environmental monitoring. Background technique [0002] The concentration of stable xenon in the air is very low, with a global average of about 8.7×10 -8 (v / v), difficult to measure and collect. Document retrieval disclosure: German Linde AG Alfred Vanner et al. have a patent with the invention number CN1929455 "Method for Obtaining Krypton and / or Xenon by Low-Temperature Separation of Air", which introduces compr...

Claims

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Application Information

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IPC IPC(8): B01D53/04C01B23/00
Inventor 张昌云武山陈莉云曾宝珠刘龙波陈占营
Owner NORTHWEST INST OF NUCLEAR TECH
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