| 摘要 |
A system is disclosed for reducing the amount of waste water and recovering reusable constituents from a waste stream comprising at least two constituents having different relative volatilities. The system includes a vapor thermocompression evaporator, into which the waste stream is directed, to vaporize one of the constituents within the waste stream without appreciably vaporizing other constituents in the waste stream. The vapor thermocompression evaporator also has a vapor compressor for compressing the vaporized fraction of the first constituent and delivering this compressed vaporized fraction to transfer heat to the waste stream. The system further has a film evaporator in series with the vapor thermocompression evaporator which transfers heat to the stream after it leaves the vapor thermocompression to vaporize substantially all of the first constituent without appreciably vaporizing the second constituent. There is a also a second vapor compressor in communication with the film evaporator for compressing the vaporized first constituent from the film evaporator and delivering the compressed vaporized first constituent to either the vapor thermocompression evaporator or the film evaporator in order to transfer heat to the stream therein. |
