4.18J required to boil 1 gram of water. Each person needs 100L a day (mostly for hygenic purposes). 1L of water weighs 1kg. 100kg of water per person. 418kJ of energy per person per day to desalinate water by evaporation excluding energy required to recondense.
For a city the size of Tulsa that is 188.1GJ a day. On top of the 38.88TJ it needs a day for household use.
This is just for the people, not industry use.
This is why we don't evaporate water for desalination.