| 摘要 |
1, 39, 340. Film evaporators; distillation of water. AQUA-CHEM Inc. Dec. 20,1963 [Dec. 21, 1962], No. 50339/63. Heading B1B. Liquid is evaporated by spraying it through jets 13 on to a tube 14, so that the liquid flows over the outer surface of the tube in the form of a film, while hot water, which has been withdrawn from the cooling-jacket of an engine 31, flows through the tube and gives up heat to the film of liquid, and/or the inside of the tube is supplied with steam from source 29, when the hot water from the engine-jacket does not transfer sufficient heat for the evaporation of the liquid or when the engine is not in operation. Valves 33 and 30 are operated to control the supply of hot water, from the jacket of engine 31, and/or steam from source 29 to the interior of tube 14. The apparatus shown is surrounded by a shell 11 which is evacuated by pump 25, and is suitable for the production of distilled water from sea water. The sea water is introduced into the system through inlet 23, and part of it is used as seal-water for pump 25. The bulk of the sea water flows to the evaporator-jets 13 via preheater 15 where it is heated by the steam produced by evaporation from the film flowing over tube 14. The condensate, i.e. distilled water, formed in preheater 15, is withdrawn from the system through conduit 50. A test panel is connected to the conduit 50 via three-way valve 48. Some of residual brine in hot well 17 is recirculated to the jets 13 and some is discharged via valve 20. The evaporator may be operated at an absolute pressure of 2¢ "mercury, the sea water being evaporated at a temperature of approximately 110‹F. using engine-jacket-water at a temperature of about 150‹F. |
