DE3347118A1 - Process for the purification of iodine-containing exhaust air from nuclear plants - Google Patents

Process for the purification of iodine-containing exhaust air from nuclear plants

Info

Publication number
DE3347118A1
DE3347118A1 DE19833347118 DE3347118A DE3347118A1 DE 3347118 A1 DE3347118 A1 DE 3347118A1 DE 19833347118 DE19833347118 DE 19833347118 DE 3347118 A DE3347118 A DE 3347118A DE 3347118 A1 DE3347118 A1 DE 3347118A1
Authority
DE
Germany
Prior art keywords
iodine
exhaust air
purification
containing exhaust
nuclear plants
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19833347118
Other languages
German (de)
Inventor
Willi 6729 Leimersheim Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19833347118 priority Critical patent/DE3347118A1/en
Publication of DE3347118A1 publication Critical patent/DE3347118A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
    • G21F9/02—Treating gases

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Process for the purification of iodine-containing exhaust air from nuclear plants, in which the iodine is deposited on adsorption filters, characterised in that the exhaust air is first passed over a catalyst which decomposes the organic iodine compounds, whereupon the elementary iodine resulting during this is deposited on adsorption filters.

Description

Verfahren zum Reinigen von jodhaltiger Abluft aus kerntechnischen AnlagenProcess for cleaning exhaust air containing iodine from nuclear facilities Investments

Die Abluft aus kerntechnischen Anlagen wird zunächst mittels Vor- und Feinfilter von Stäuben gereinigt und sodann über Jod-Sorptionsfilter zur Abscheidung radioaktiven Jods geführt. Dabei werden jedoch organische Jodverbindungen, w. z. B. Jod-Benzol schlechter abgeschieden als elementares Jod, so daß solche Jodverbindungen einen höheren filtertechnischen Aufwand notwendig machen. Der Problemkreis "penetrierendes Jod" wird in der "VBG-Zeitschrift" Heft Dez. 83 beschrieben und erfordert einen erheblichen Filteraufwand.The exhaust air from nuclear facilities is initially and fine filter cleaned of dust and then separated by an iodine sorption filter radioactive iodine led. However, organic iodine compounds, e.g. B. iodine-benzene deposited worse than elemental iodine, so that such iodine compounds make a higher technical filter effort necessary. The problem area "penetrating Jod "is described in the" VBG-Zeitschrift "issue Dec. 83 and requires one considerable filter effort.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Verfahrensführung vorzusehen, die auch radioaktive organische Jodverbindungen vollständig zurückzuhalten gestattet.The invention is therefore based on the object of carrying out the process provide that also completely withhold radioactive organic iodine compounds allowed.

Zur Lösung dieser Aufgabe wird vorgeschlagen, die Abluft zunächst über einen Katalysator zu führen, der die organischen Jodverbindungen zersetzt und das gebildete anorganische Jod abscheidet. Das dem Katalysator nachgeschaltete Sorptionsfilter scheidet das anorganische Jod vollständig ab.To solve this problem, it is proposed that the exhaust air first to lead over a catalyst that decomposes the organic iodine compounds and separates the formed inorganic iodine. The sorption filter downstream of the catalytic converter separates the inorganic iodine completely.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand einer Skizze erläutert. Die Skizze zeigt schematisch einen Abluftstrang mit 1000 m3/h Durchsatz.An embodiment of the invention is based on a Sketch explained. The sketch shows schematically an exhaust air line with 1000 m3 / h Throughput.

In einer ersten Stufe wird die Abluft mittels Vor- und Feinfilter von Staub gereinigt. Sie gelangt sodann über einen Katalysator aus Edelmetall oder Edelmetallgemischen, der bei ca. 400" C arbeitet. Dabei werden etwaige organische Jodverbindungen zersetzt, wobei elementares Jod, Kohlendioxid und Wasser entsteht. Diesem Katalysator ist ein Kühler und ein Jodsorptionsfilter, z. B. mit Kaliumjodid imprägnierte Aktivkohle, nachgeschaltet. In diesem Sorptionsfilter wird sämtliches elementares Jod abgeschieden, sq' daß die zum Kamin gelangende Abluft frei von radioaktivem Jod ist.In a first stage, the exhaust air is filtered using a pre-filter and a fine filter cleaned of dust. It then passes over a precious metal or catalyst Precious metal mixture that works at approx. 400 "C. Any organic Iodine compounds decompose, producing elemental iodine, carbon dioxide and water. This catalyst is a cooler and an iodine sorption filter, e.g. B. with potassium iodide impregnated activated carbon, downstream. Everything is in this sorption filter elemental iodine separated, so that the exhaust air reaching the chimney is free of radioactive substances Iodine is.

Der Aufwand für das Adsorptionsfilter richtet sich somit nur noch nach dem leichter abzuscheidenden elementaren Jod und nicht mehr nach den organischen Jodverbindungen.The effort for the adsorption filter is therefore only directed for elemental iodine, which is easier to separate, and no longer for organic Iodine compounds.

- Leerseite -- blank page -

Claims (1)

Verfahren zum Reinigen von jodhaltiger Abluft aus kerntechnischen Anlagen, bei dem das Jod an Adsorptionsfiltern abgeschieden wird, dadurch gekennzeichnet, daß die Abluft zunächst über einen Katalysator geführt wird, der organische Jodverbindungen zersetzt, worauf das dabei entstehende elementare Jod an Adsorptionsfiltern abgeschieden wird. Process for cleaning exhaust air containing iodine from nuclear facilities Systems in which the iodine is separated on adsorption filters, characterized by: that the exhaust air is first passed over a catalyst, the organic iodine compounds decomposed, whereupon the resulting elemental iodine is deposited on adsorption filters will.
DE19833347118 1983-12-27 1983-12-27 Process for the purification of iodine-containing exhaust air from nuclear plants Withdrawn DE3347118A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833347118 DE3347118A1 (en) 1983-12-27 1983-12-27 Process for the purification of iodine-containing exhaust air from nuclear plants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833347118 DE3347118A1 (en) 1983-12-27 1983-12-27 Process for the purification of iodine-containing exhaust air from nuclear plants

Publications (1)

Publication Number Publication Date
DE3347118A1 true DE3347118A1 (en) 1985-07-11

Family

ID=6218177

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833347118 Withdrawn DE3347118A1 (en) 1983-12-27 1983-12-27 Process for the purification of iodine-containing exhaust air from nuclear plants

Country Status (1)

Country Link
DE (1) DE3347118A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3893253A1 (en) * 2020-04-10 2021-10-13 Hitachi-Ge Nuclear Energy, Ltd. Organic iodine trapping apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3893253A1 (en) * 2020-04-10 2021-10-13 Hitachi-Ge Nuclear Energy, Ltd. Organic iodine trapping apparatus

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