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

THE EVAPORATOR. 105 5. The Coil Drain. 83. The use of this is explained in paragraphs 66 and 67. 6. The Feed Inlet. 84. The feed inlet is placed at various parts of the casing. Sometimes high up, sometimes low down. The best place is probably at a point that enables the feed-water either to flow in or be pumped in, as near as possible to the centre of the ebullition, because there it is more likely to mix up well with the sea water that is boiling, and the salinity of the whole body of brine in the casing thus kept more uniform. It is also well to place the feed inlet on the opposite side to the brine discharge, so as to pre- vent the feed-water passing away with the brine before it lias been sufficiently evaporated, as this would render the brine stronger than it need be. The manner of heating the feed, and of regulating it, will be dealt with later on. 7. Filling Pipe and Cock. 85. This is for charging the evaporator with sea water quickly to start with, and thus avoid the tedious process of filling it slowly by means of the feed-box or regulator. The filling pipe should not, however, be used as a sub- stitute for the proper method of feeding the evaporator. This should be left to the automatic work of the feed regulator, but in case of emergency this filling pipe might be used temporarily to feed the evaporator, its regulation being then done by hand.