Falling film convective distillation unit with direct contact condensation

Claim 1

A SALINE WATER PURIFICATION SYSTEM COMPRISING AN ENCLOSURE CONTAINING A GASEOUS ATMOSPHERE, PRESSURE CONTROL MEANS ASSOCIATED WITH SAID ENCLOSURE AND OPERATIVE TO MAINTAIN SAID GASEOUS ATMOSPHERE AT A SELECTED SUBATMOSPHERE PRESSURE, MEANS OPERATIVE TO MOVE THE GASEOUS ATMOSPHERE THROUGH A CIRCULAR PATH UPWARDLY IN ONE PORTION OF SAID ENCLOSURE AND DOWNWARDLY IN ANOTHER PORTION, A FIRST COOLING TOWER LOCATED WITHIN SAID ENCLOSURE AND SAID ONE PORTION, MEANS OPERATIVE TO HEAT SALINE WATER TO A TEMPERATURE IN EXCESS OF THE TEMPERATURE OF THE GASEOUS ATMOSPHERE WITHIN SAID ENCLOSURE AND TO CONVEY THE SO HEATED SALINE WATER TO SAID FIRST COOLING TOWER TO FLOW DOWNWARDLY THROUGH SAID TOWER IN THIN FILM ATTITUDE IN COUNTERFLOW DIRECT SURFACE CONTACT WITH THE UPWARDLY MOVING GASEOUS ATMOSPHERE TO HEAT SAME AND BECOME PARTIALLY EVAPORATED TO HUMIDIFY THE SO HEATED ATMOSPHERE, MEANS ARRANGED TO CONVEY UNEVAPORATED SALINE WATER FROM SAID FIRST COOLING TOWER OUT FROM SAID ENCLOSURE, A SECOND COOLING TOWER DISPOSED WITHIN SAID ENCLOSURE ABOVE SAID FIRST COOLING TOWER, MEANS OPERATIVE TO SUPPLY FRESH WATER AT A TEMPERATURE BELOW THE TEMPERATURE OF THE SO HEATED GASEOUS ATMOSPHERE TO SAID SECOND COOLING TOWER ALSO TO FLOW DOWNWARDLY THROUGH SAID SECOND TOWER IN THIN FILM ATTITUDE IN COUNTERFLOW DIRECT SURFACE CONTACT WITH THE UPWARDLY MOVING HEATED AND HUMIDIFIED GASEOUS ATMOSPHERE TO COOL SAME AND TO CAUSE DEHUMIDIFICATION THEREOF WITH CONSEQUENT INCREASE IN THE VOLUME OF SAID FRESH WATER AND MEANS OPERATIVE TO EXTRACT FROM SAID SECOND COOLING TOWER AN AMOUNT OF FRESH WATER EQUAL TO SAID INCREASE IN VOLUME.