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Preparation method of activated carbon for adsorbing krypton serving as inert gas in nuclear power station

A technology of activated carbon preparation and inert gas, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problem that the adsorption coefficient, particle size, resistance, and water content cannot meet the requirements of nuclear power plants at the same time, etc. problems, to achieve the effect of improving the performance of krypton adsorption, low filling requirements and high performance

Inactive Publication Date: 2014-12-24
JIANGSU NUCLEAR POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the domestically produced activated carbon used for iodine removal cannot be directly used to adsorb krypton
[0005] In addition, the activated carbon produced by the activated carbon factory often cannot meet the requirements of nuclear power plants in terms of adsorption coefficient, particle size, resistance, water content and other indicators due to only one activation and other processing.

Method used

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  • Preparation method of activated carbon for adsorbing krypton serving as inert gas in nuclear power station
  • Preparation method of activated carbon for adsorbing krypton serving as inert gas in nuclear power station
  • Preparation method of activated carbon for adsorbing krypton serving as inert gas in nuclear power station

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preparation example Construction

[0042] A kind of activated carbon preparation method for nuclear power plant of the present invention that adsorbs inert gas krypton comprises the following steps:

[0043] Step 1 Dry the activated carbon raw material

[0044] The active carbon raw material in the present embodiment adopts unshaped coconut shell charcoal produced in Malaysia. The activated carbon raw material is placed in a drying oven, rotary kiln or drying kiln for secondary drying, and sealed and cooled. The drying temperature is strictly controlled below 300°C to prevent changes in the porous structure of activated carbon raw materials caused by excessive temperature.

[0045] In order to control the drying temperature, temperature measuring points can be reasonably set during the drying process. Generally, thermometers are set at 1 / 3 height and 2 / 3 height of the activated carbon raw material.

[0046] Through the above dehumidification and drying treatment, the water content of the activated carbon raw ...

Embodiment 1

[0063] Embodiment 1 The nuclear power plant activated carbon preparation method of adsorbing krypton

[0064] step 1

[0065] The unshaped coconut shell activated carbon produced in Malaysia is used as the activated carbon material in the drying kiln for secondary drying. The drying kiln is divided into 10 layers and has a cylindrical structure. About 2 tons of activated carbon are dried at a time. Platinum resistance thermometers are installed at the heights of 3, the temperature is controlled at 230°C during drying, and the water content of the activated carbon after drying is 1.51%.

[0066] step 2

[0067] Step 2.1

[0068] Use cyclone type separator and activated carbon filter screen, sieve out the activated carbon raw material of 5-8 mesh particle size range from the amorphous coconut shell carbon after step 1 drying, concrete distribution is as shown in table 1.

[0069] Table 1 Distribution of activated carbon in the particle size range of 5-8 mesh

[0070] ...

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Abstract

The invention belongs to the technical field of measurement of physical and chemical performances of materials and particularly relates to a preparation method of activated carbon for adsorbing krypton serving as an inert gas in a nuclear power station. The method comprises the following steps of 1, drying activated carbon raw materials; 2, sieving the activated carbon raw materials; 3, selecting activated carbon ingredients; 4, mixing the activated carbon ingredients; and 5, carrying out split charging on the activated carbon. By using the method provided by the invention, the technical problem that the technical requirement for adsorbing the radioactive inert gas in the nuclear powder station is difficult to meet by the activated carbon prepared by using the existing method is solved; and the activated carbon for adsorbing the radioactive inert gas is obtained through carrying out reasonable secondary treatment and preparation on the existing activated carbon, so that the technical requirements of the nuclear power station for adsorption coefficient, particle size, resistance and water content can be met.

Description

technical field [0001] The invention belongs to the technical field of material physical and chemical performance measurement, and in particular relates to a method for preparing activated carbon for nuclear power plants that absorbs inert gas krypton. Background technique [0002] The use of activated carbon to adsorb radioactive inert gases such as Ar, Kr, Xe and Rn is an effective method for the removal of radioactive inert gases, especially in nuclear power plants, the use of activated carbon retention beds for adsorption and retention of radioactive inert gases can effectively remove them Radioactivity, the purpose of protecting the health of staff and reducing environmental pollution. [0003] At present, the activated carbon installed in the inert gas detaining bed in the nuclear power plant is mainly supplied to foreign manufacturers, and its technical formula is the technical secret of the manufacturer, which is not provided to the power station, resulting in the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
Inventor 欧阳钦魏建军张振中朱金雄张昭张震付小军张冰管玉峰周正平茆秋华
Owner JIANGSU NUCLEAR POWER CORP