| 摘要 |
A method and an apparatus for dewatering a moving web (1) containing water. According to the invention the web is subjected to a plurality of successive ultrasonic signal bursts in order to achieve water removal from the web. The method can be performed by conducting the web (1) past an ultrasound emitter (5) extending over the width of the web and having a limited length in the travel direction of the web (1), by directing ultrasonic vibration energy to the web (1) in order to form a mist of water microdroplets and/or to achieve surface microwaving, and by removing the mist from the vicinity of the web as well as evaporated water and/or solvent vapors from the vicinity of the web. The invention provides for efficient drying of webs. |
