Method for using water hydraulics in a paper or board machine

摘要

Water hydraulics are used in a paper or board machine, in particular in applications requiring lubrication and in the like in which an operating medium is subjected to pressure. A chemical which is used in the stock system (A) of the process is mixed with the water used in water hydraulics before the water is passed to a site of application (5) in order to raise the viscosity of the water and chemical mixture to a level required by the site of application (5). The water and chemical mixture is passed (3in) after that to the site of application (5) and circulated through the same at least once, after which said water and chemical mixture is recovered (2) and passed to the stock system (A) of the process as diluted to a suitable concentration.