FILTRATION OF SALT SMOKE FROM CHLORATE CANDLE OXYGEN.

Filtration of a sodium chloride aerosol in high concentration proved to be a continuing problem during the development of chlorate oxygen candles and their associated equipment for use on submarines. Rockwool-wire mesh combinations were first used in welded assemblies which were cleaned by water washing when they became clogged. The rockwool was later replaced with fiberglass blanket, and two modifications of the assembly were made, but the filter use remained inconvenient because of inadequate salt capacity. A progressive step proved to be alteration of the assembly to use a throwaway fiberglass element and elimination of the washing operation. Further improvement was made possible by use of a woven replaceable fiberglass sleeve. The recently constructed assembly incorporating woven sleeve elements is to be subjected to sea trials as soon as possible. Author