A Practical Manual On Sea Water Distillation
With A Description Of The Necessary Machinery For The Process

IÖ2 SEA WATER DISTILLATION. G, Circulation discharge. H, Feed pipe and cock, to feed box from distiller. J, Water level gauge. K, Feed inlet to evaporator. L, Feed box (ordinary adjustment). (I), Gauge glass on feed box. M, Feed pipe to evaporator (from feed box). N, Fresh water pipe from distiller to filter. O, Circulation inlet (from pump not shown). P, Fresh water outlet from filter. Q, Filling pipe, for charging evaporator with sea water. R, Drain cock to empty distiller. In this apparatus a feed box (L) is shown instead of a feed regulator (Fig. 12, p. 113). The feed gravitates from the feed box into the evaporator. First.—Start the pump (to about the speed specified it should work at) so as to pass circulation water through the distilling condenser, entering it at (0) and escaping at (G), and as soon as this is done use the filling pipe (Q) to charge the evaporator with sea water, and then let the ordinary feeding take place by means of the auto- matic feed box (L) or regulator (Fig. 12, p. 113). Secondly.—Let the boiler steam pass, by valve (D), into the evaporator coils. It is best to do this very gradually, and as soon as an adequate pressure is obtained in the evaporator casing, generally about 3 to 6 inches head of water, indicated by water pressure gauge (B), then let the apparatus work at this, and pass its gained steam through pipe (A) into the distiller tubes. Thirdly.—The water produced will soon flow from the fresh water pipe (N) into the feed regulator, if there is one (Fig. 12, p. 113), thereby regulating the feed; and the brine