| 摘要 |
PURPOSE:To reduce operation cost, by connecting a storage tank of a waste liquid containing sodium hypochlorite and a tower packed with a nickel oxide catalyst to a liquid recirculation system using a liquid feed pump by piping. CONSTITUTION:The bottom part of a storage tank 1 in which a waste liquid 2 containing sodium hypochlorite flows is connected to a packed power 3 charged with a nickel oxide catalyst bed 4 by a conduit 7 and the upper part of the packed tower 3 is connected to that of the storage tank 1 by a conduit 7'. The storage tank 1 and the packed tower 3 are connected to the system, which recirculates the waste liquid by the liquid pump 8 interposed to the appro priate position of the conduits 7, 7', by piping. At the time of operation, the waste liquid 2 containing sodium hypochlorite passes through the conduit 7 by driving the liqiud feed pump 8 to enter the packed tower 3 to be contacted with the nickel oxide catalyst bed 4 while rising through the tower 3. The waste liquid after reaction passes through the conduit 7' from the upper part of the packed tower 3 to return to the storage tank 1. By this method, the waste liquid can be efficiently made innoxious without using chemicals.
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