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

CHAPTER II . TYPES OF DISTILLING- APPARATUS. (a) For Steam Ships. Description of Double Distilling Apparatus. 1. For steam ships, the usual class of distilling machinery is what is known as Double Distilling apparatus. This class of apparatus consists of an Evaporator with a Dis- tiller (or Distilling Condenser, as it is sometimes called). These are the main parts of the apparatus. The steam from the boiler, or exhaust steam pipes on board, is supplied to the evaporator so as to enable it to generate an extra or gained supply of steam from the sea water it evaporates, and such steam is conducted into the distilling condenser, where it is condensed into pure distilled water. The Filter and Steam Pump. 2. To complete the distiller, and to render the distilled water palatable, a filter is included, and (although not always necessary, as will be shown further on) a steam pump is included, the functions of which are to force the circulation water through the distilling condenser, and to pump away the brine from the evaporator, also to pump the drinking water produced to where desired. Such brine has to be cooled and diluted, and then pumped out to sea, as it would be objectionable for it to run into the bilge of the ship.