PROCESS AND DEVICE FOR RECOVERING FLUORIDE

PROBLEM TO BE SOLVED: To provide a process and a device for recovering fluorides capable of recovering stably and in certain high concentration the fluorides incorporated in waste gas. SOLUTION: After allowing the adsorbent to adsorb the fluorides by introducing the waste gas containing the fluoride...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAZAWA KAZUHIRO, NITTA AKIHIKO, SUGIMORI YOSHIAKI
Format:	Patent
Sprache:	eng
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a process and a device for recovering fluorides capable of recovering stably and in certain high concentration the fluorides incorporated in waste gas. SOLUTION: After allowing the adsorbent to adsorb the fluorides by introducing the waste gas containing the fluorides to an adsorption cylinder 1 in which the adsorbent is filled, the fluorides are desorbed from the adsorbent by introducing desorption gas while heating the adsorbent, and also the desorption gas containing the fluorides is circulated to the adsorption cylinder 1 by a circulation passage 7 to stabilize a fluoride concentration in the desorption gas.