| 摘要 |
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 ga s 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 th e 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). I t 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 secon d 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 g as 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 wei r K2.
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