Process for the treatment of material-gas mixtures
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United States of America Patent
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May 21, 1991
Grant Date -
N/A
app pub date -
Jan 29, 1990
filing date -
Jan 31, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to processes for the treatment of in particular medium and highly consistent material-gas mixtures to be pumped, preferably gas-containing, in particular air-containing fibrous material suspensions, a separation of the gas being effected prior to the pumping operation. The invention is mainly characterized in that the material-gas mixture, preferably the gas-containing fibrous material suspension, is subjected in a separate container separate from the pump housing for the separate gas separation, in particular air separation, preceding the pumping operation, to a conveniently high-speed rotation of in particular between 1,200 and 3,400 rpm, preferably of about 3,000 rpm, while at least in operation, gas, in particular air, is sucked off or a vacuum is generated approximately in the center of the rotating motion of the material-gas mixture. The invention further relates to plants and devices e.g. suitable for carrying out these processes. Conveniently, separate housings are provided for the degassing device and the pump.
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