Kernforschungszentrum Karlsruhe Gmbh

Bayer Aktiengesellschaft

Jurgen Wilhelm

Lothar Puppe

Manfred Ohlmeyer

Hans-Georg Dillmann

Heinrich Mahnau

A process for the rapid and effective removal of iodine, organic iodine compounds with a small number of carbon atoms or mixture thereof from gases and/or vapors, comprising passing said gas or vapor through an adsorbent bed containing a silver-lead-exchanged zeolite X.

Process for the removal of iodine and iodine compounds from

Iodine and organic iodine compounds which may be radioactive and which may be found in waste gases or vapors from nuclear reactors can be removed from such gases or vapors by passing the iodine or organic iodine compound-containing gases or vapors through a layer of binder-free silver-exchanged molecular sieve granulates of the faujasite type.

Process for the removal of iodine and organic iodine compounds from

For the purification of air or gas streams the air or gas is conducted across a multi-zone adsorption apparatus through which a particulate filter material is moved downwardly by gravity. The gas stream is first admitted to the adsorption apparatus adjacent the downstream end to a first stage having an upstream and a downstream zone and, upon leaving the first stage, is divided into partial streams which are conducted back through an upstream adsorption material stage such that the gas from the most downstream filter material zone of the first stage which still has the highest contaminant content is admitted to and passed through the most upstream filter material zone of an upstream second stage of the apparatus and the upstream zone gas or air from the first stage is admitted to the downstream zone of the first stage in order to provide for high decontamination efficiency and for similar end decontamination of all the gas or air passed through the apparatus.

Method for the purification of air or gas streams by a multi-path

Measuring arrangement for determining the concentration of gaseous radioiodine in a carrier gas, composed of a mass of sorption agent for separating the gaseous radioiodine from the carrier gas and for accumulating the separated radioiodine, with a part of the mass of sorption agent being located in a measuring region, a conduit for conducting the carrier gas to the sorption agent and provided with at least one outlet via which carrier gas can flow into the measuring region containing sorption agent, and a radiation detector disposed for detecting radiation emanating from the measuring region, with the sorption agent being movable relative to the conduit for bringing different portions of the mass of sorption material into the measuring region.

Measuring arrangement for determining the gaseous radioiodine

A filter system is provided for purifying a gas stream by means of flowable or tricklable contact filter material, wherein the stream flows through the filter material and the filter material forms a movable bed. The system contains a filter chamber through which the filter material can flow and which is provided with an inlet opening and an outlet opening for the filter material between which the filter material is conveyed by gravity. The filter system includes deflection means for deflecting the stream, after a first passage of the stream through the filter bed to charge the filter bed for a first time, to a position above where the stream first passed through the filter bed and for conducting the stream at least once again transversely through the filter bed above the first charge so that the filter bed is charged a second time. The filter chamber contains a first opening where the stream enters the filter bed for the first time and is aligned with the deflection means, and a second opening aligned with the deflection means and above the first opening. The second opening is located where the stream leaves the filter bed for the second time, with a partial quantity of the gas stream being able to pass directly through the filter bed from the first opening to the second opening without going through the deflection means. The distance between the upper edge of the first opening and the lower edge of the second opening is at least twice the thickness of the filter chamber.

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Gondelsheim, Germany

Jurgen Wilhelm