| 摘要 |
<p>The present invention relates to a deaeration vessel used in the paper and pulp industry. Especially it relates to an improved double-acting deaeration vessel. As implied by their name, these vessels are purposed for removing gas from a fiber suspension (a first medium). Deaeration vessels are large vessels, into which a fiber suspension to be fed into a paper machine is led as a dilute mixture. It is previously known that the final consistency of the stock to be fed from the headbox to the wire section is preferably fine-adjusted just before the headbox or in connection therewith. This fine adjustment requires deaerated fresh water or equivalent (a second medium). It is characteristic of the deaeration vessel in accordance with the invention that the same gas space (17) where the first medium is treated in the vessel (2), is provided with a second partition wall (13) forming a second weir K2 and that the vessel jacket is provided with an inlet/inlets (11) for a second medium to be introduced into the vessel and with an outlet (14) for a substantially gas-free second medium, and that the common gas space (17) is provided with an outlet (7) known per se, which outlet is intended for the gas separated from both the first and the second medium, and with an outlet (8, 15) for the surface flow/fraction (19) of the second medium separated by weir K2.</p> |
