RADIOACTIVE CESIUM REMOVAL METHOD AND REMOVAL APPARATUS

• Main Authors: HONMA, KENICHI, OKAMURA, SOUICHIROU, OGIRI, TETSUO
• Format: Patent
• Language: English; French
• Published: 23.05.2013
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMBUSTION APPARATUS; COMBUSTION PROCESSES; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DECONTAMINATION ARRANGEMENTS THEREFOR; FLUES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; REFRACTORIES; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF NATURAL STONE; WEAPONS

[Problem] To provide a method for removing, at a low cost, radioactive cesium from wastes containing radioactive cesium, and a facility therefor. [Solution] A facility (1) for the removal of radioactive cesium, provided with: an incinerator (22) for burning and incinerating combustible wastes which are contaminated with radioactive cesium; a suspension preheater (23) in which cyclones are arranged in a multi-stage state and in which calcium oxide and/or magnesium oxide is formed from a calcium oxide source and/or a magnesium oxide source using the sensible heat of both an exhaust combustion gas (G5) and incineration ash of combustibles (C), the gas (G5) and the incineration ash being discharged from the incinerator (22); a rotary kiln (21) in which an inorganic substance (S) contaminated with radioactive cesium is fired together with calcium oxide and/or magnesium oxide and incineration ash (D3); and recovery units (31,32) for recovering cesium volatilized in the rotary kiln (21).