Method for regulating the surface level and consistency in a tank for metering component stock
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United States of America Patent
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-
Apr 3, 2001
Grant Date -
N/A
app pub date -
Jun 10, 1999
filing date -
Jun 10, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method for regulating the surface level and the consistency in a stock chest for metering of a component stock. Stock is fed as an outward flow out of the bottom portion of a storage tower by a first pump into the stock chest. Into this outward flow, a first dilution water flow is passed in order to regulate the consistency of the stock fed into the stock chest to a--desired level. The stock is fed as a metering flow from the stock chest by a second pump into the short circulation of the paper or board machine. The surface level in the stock chest is maintained constant by an overflow passed from the stock chest (20) into a pumping tank. From the pumping tank, stock is fed as a return flow by a third pump into the bottom portion of the storage tower. A second dilution water flow is passed into this return flow to thereby regulate the consistency in the bottom portion of the storage tower to a desired level. The stock is stirred in the bottom portion of the storage tower and in the stock chest in order to provide a uniform consistency.
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