Method and device for vacuum impregnation and vacuum predrying of nuclear grade active carbon

Abstract

The invention relates to a nuclear grade active carbon production device and especially relates to a method and a device for vacuum impregnation and vacuum predrying of nuclear grade active carbon. The method comprises the following steps of putting active carbon into a rotatablely rolling vacuum tank, carrying out atomization and spraying of an impregnation liquid introduced into the vacuum tank on the surface of active carbon rolling ceaselessly by a spraying system, after active carbon impregnation, increasing the pressure in the vacuum tank to ordinary pressure, carrying out vacuum predrying, simultaneously opening a vacuum pump and an oil electric heater, and carrying out vacuum-pumping and heating on the tank body with continuous rotation of the vacuum tank so that active carbon heating is uniform and low-temperature low-pressure evaporation is realized. The device improves a double-cone vacuum rotation tank, utilizes the spraying system to atomize an impregnation agent under pressing conditions so that the atomized impregnation agent contacts with active carbon rolling in vacuum and is fast bound to the active carbon. The device has dual uses, realizes vacuum impregnation and vacuum predrying of active carbon by one step, and has effects of time, manpower and power saving.

Description

Technical field [0001] The invention relates to a nuclear-grade activated carbon production equipment, in particular to a nuclear-grade activated carbon vacuum impregnation and vacuum pre-drying treatment method and equipment. Background technique [0002] In order to ensure the safe operation of the nuclear industry and nuclear power plants, the gas containing radioactive iodine needs to be adsorbed and retained. Nuclear-grade activated carbon is mainly used to purify radioactive iodine in the form of adsorbed gas. The impregnation process is an important part of the nuclear-grade activated carbon production process. [0003] Chromatographic analysis of multiple batches of activated carbon impregnation adsorption on the same impregnation solution showed that in the same impregnation solution, as the number of soaking batches increases, the effective content of the impregnation solution is rapidly decreasing. In the past, the impregnation process of activated carbon adsorbent was...

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Problems solved by technology

[0004] The purpose of the present invention is to address the defects of the existing nuclear-grade activated carbon impregnation process, provide a method and equipment for nuclear-grade activated carbon impregnation and vacuum pre-drying treatment in a vacuum state, improve the uniformity of activated carbon impregnation and drying, improve product quality and Productivity

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