Extraction of water from a wet paper/cardboard web has a leading press assembly followed by a water extraction zone where a gas under pressure displaces water from the web

摘要

For the extraction of water from a wet paper/cardboard web (12), it is passed through an extraction zone (E) where the water is displaced by a gas (14) under pressure. The web is fed through a press assembly (16) before it enters the extraction zone. To extract water from a wet paper/cardboard web, the preceding press assembly can be a shoe press or a roller press. An Independent claim is included for a water extraction stage, for a wet paper/cardboard web, where the web passes through a press assembly and into a water extraction zone where a gas under pressure displaces water from the web.