| 摘要 |
A process arrangement for the short circulation in a paper or board machine, which arrangement comprises stock chests (20i) for component stocks (Mi), metering pumps (21i) for component stocks, cleaning devices (115, 120, 140, 190, 195), pumps (110, 130, 170, 180), a headbox (150) and a wire section (160) as well as a system of pipes connecting said apparatuses, together wit h regulation devices. After the metering pumps (21i), the component stock flow s (Mi) have been passed into a closed mixing volume, in which the component stocks (Mi) are mixed and diluted with a first dilution water flow (F10). Fr om this closed mixing volume the stock has been passed in a closed space, by means of a first feed pump (110) of the main line of the process, through a screen (115) and a centrifugal cleaner (120) to the suction side of the seco nd feed pump (130) of the main line, where a second dilution water flow (F20) i s passed to the stock. The second feed pump (130) feeds the stock through a machine screen (140) to the inlet header in the headbox (150).
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