Does you use sea water to the boiler in steam power plant and can you make return water from condensor as drinking water?

Answer 1

Sea water has far too much dissolved solids in it for a modern steam boiler, which would quickly get clogged up with salts left behind from water evaporation. In fact even ordinary mains fresh water has to be demineralised, that is purified, before it is suitable. The cool water coming out of the condenser could be drunk as it is very pure, but it is under vacuum at that point so it would need to be pumped out.