| 摘要 |
PAPERMAKING APPARATUS INCLUDING BAFFLES A papermaking deaeration apparatus including a receiving chamber, and a plurality of cleaning and deaeration wings extending therefrom. A baffle is provided in the chamber of the receiver proximate the opening of each wing which communicates deaerated paper stock into the receiver chamber. The baffles redirect downrushing deaerated paper stock such that it is dispensed in a "knifing" shape into the pool of paper stock contained in the chamber of the receiver. Hence, standing waves and splashing in the pool of paper stock in the receiver is reduced. The static pressure head created by the pool of paper stock is more uniform such that fluctuations in the static head are reduced. Mechanical vibrations which can reach the paper machine headbox and the primary cleaner supply pump are reduced such as the quality, consistency and caliper of the paper manufactured by the headbox is improved. Further, reprocessing of deaerated paper stock which overflows a weir residing in the chamber of the receiver is also reduced. Consequently, the cleaner supply pump is operated at a considerably lower flow, away from cavitation. As a result, consumption of deaeration chemicals is reduced. Hence, the overall papermaking deaeration apparatus is more efficient. Each baffle has a concave surface facing inward towards the wing chamber to cause conversion of the downrushing deaerated paper stock into a wide thin knife shape before entering the receiver chamber. The deaerated paper stock is deflected by the baffle downward into the receiver chamber below the surface of the pool.
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