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    Method and apparatus for treating pulp with oxygen and storing the treated pulp
    51.
    发明授权
    Method and apparatus for treating pulp with oxygen and storing the treated pulp 失效
    用氧处理纸浆并储存经处理的纸浆的方法和设备

    公开(公告)号：US4295927A

    公开(公告)日：1981-10-20

    申请号：US48917

    申请日：1979-06-15

    申请人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

    发明人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

    IPC分类号： D21B1/16 ,  D21B1/34 ,  D21C9/00 ,  D21C9/10 ,  D21D1/30 ,  D21D5/28

    CPC分类号： D21C9/004 ,  D21B1/16 ,  D21B1/342 ,  D21C9/1068 ,  D21D1/30

    摘要： A wood pump slurry is treated with oxygen in a mill with little change to the process or structure of the mill. No special pressure tanks are required. The consistency of the pulp need not be altered for the treatment step. It may be treated at the usual process consistency of the pulp; e.g., it may be treated at the usual consistency of the pulp leaving a washer or subsequent steam mixer without additional dewatering or additional dilution.The oxygen is added into a closed section of the system so that it cannot immediately vent to the atmosphere. Alkali should also be present when the oxygen is mixed with the slurry. The mixing should occur near to the point of oxygen addition.The oxygen is inserted into the pulp slurry and mixed with the pulp slurry between a washer and the subsequent storage tank.The mixing occurs in a relatively small mixter that intensively mixes the slurry and gas. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and an optimum range of around 65,400 square meters per metric ton of oven-dry pulp.Other systems and specific mixer designs are also disclosed.

    摘要翻译： 在磨机中用氧气处理木浆泵浆料，对轧机的工艺或结构几乎没有变化。 不需要特殊的压力罐。 对于处理步骤，不需要改变纸浆的稠度。 可以按照纸浆的通常工艺一致性进行处理; 例如，可以以离开洗涤器或随后的蒸汽混合器的纸浆的通常稠度进行处理，而无需额外的脱水或额外的稀释。 将氧气加入系统的封闭部分，使其不能立即排放到大气中。 当氧气与浆料混合时，碱也应存在。 混合应发生在加氧附近。 将氧气插入纸浆中并与浆料在洗涤器和随后的储罐之间混合。 混合发生在相当小的混合器中，其密集地混合浆料和气体。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每公吨烘干纸浆的优选范围是25,000至15万平方米，每公吨干燥纸浆的最佳范围约为65,400平方米。 还公开了其他系统和特定混合器设计。

    ARRANGEMENT AND METHOD FOR DEGASSING A PUMP
    60.
    发明申请
    ARRANGEMENT AND METHOD FOR DEGASSING A PUMP 有权

    公开(公告)号：US20220025578A1

    公开(公告)日：2022-01-27

    申请号：US17297942

    申请日：2019-11-28

    申请人： ANDRITZ OY

    发明人： Ronny GEIGER ,  Kari PELTONEN

    IPC分类号： D21D5/26 ,  D21C7/08 ,  D21C9/18 ,  D21D5/28 ,  D21C9/10 ,  F04D7/04 ,  F04D13/12 ,  B01D19/00

    摘要： An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel.