| 摘要 |
<p>PURPOSE:To make an automatic defrosting operable with a continuous operation made in the refrigerator, which is for removing a moisture from radioactive gaseous wastes flowing into the active carbon adsorption tower. CONSTITUTION:A radioactive gaseous waste is preheated by a preheater 1 via an oxygen hydrogen recombinator 2 entering a condenser 3, after being demoistured by a refrigeration dehydrater 19, via a sand filter 6 entering an active carbon adsorption tower. The refrigeration dehydrater 19 is of constitution comprising a refrigerator A, which comprises a refrigerator 27 and a gas water separator 30, a refrigerator B, which comprises a refrigerator 28 and a gas water separator 31, and a refrigerator C, which comprises a refrigerator 29 and a gas water separtor 32, each of them is able to be directly connected by tubings 39, 40, 41. When the exhauxt gas is made flowing successively in the order of A B C, an outlet temperature of C is the lowest with the frost only sticking to C. Thereafter, with the valve made changeover to flow the exhaust gas in the order of C A B, the frost, having stuck to C, becomes melting due to a temperature rise caused by a relocation of C to the upstream side. In such process of sucessive changeover, the refrigerator automatically operates a defrosting.</p> |
