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    • 14. 发明授权
    • Method of washing pulp using a single endless support fabric
    • 使用单个环形支撑织物清洗纸浆的方法
    • US5599426A
    • 1997-02-04
    • US320576
    • 1994-10-11
    • Roger P. Hoffman
    • Roger P. Hoffman
    • B01D11/00B01D11/02B01D33/04D21C9/02D21D1/40
    • D21D1/40B01D11/023B01D33/04D21C9/02B01D2011/002
    • A method of washing cellulosic pulp to remove dissolved solids as well as dirt, inorganic fillers and fiber debris from the pulp. A thin mat of cellulosic pulp having a weight of 3 to 100 pounds of dry fiber per 1000 sq. ft. is applied to the upper surface of a porous, endless belt or fabric. The belt containing the pulp mat is moved in a generally horizontal path, and as it is moved in this path wash water is directed against the exposed upper surface of the mat through a series of longitudinally spaced showers to thereby impregnate the mat with wash water. Water removal devices, preferably table rolls, are located beneath the belt and downstream in the direction of travel from each shower to thereby remove the wash water from the mat. After moving through the path of travel, the washed pulp is removed from the belt, and the wash water removed from the mat can be used in other portions of the papermaking process.
    • 洗涤纤维素浆以从纸浆中除去溶解的固体以及污垢,无机填料和纤维碎屑的方法。 将每1000平方英尺重量为3至100磅干纤维的纤维素浆的薄垫片施加到多孔环形带或织物的上表面。 包含纸浆垫的带子以大致水平的路径移动,并且当其在该路径中移动时,洗涤水通过一系列纵向间隔开的淋浴而引导抵靠暴露的垫的上表面,从而用洗涤水浸渍垫。 脱水装置,优选台式辊,位于带的下方,并沿着每个淋浴的行进方向下游,从而从垫中除去洗涤水。 在移动通过行进路径之后,将洗涤后的纸浆从带中取出,并且从垫中除去的洗涤水可用于造纸过程的其它部分。
    • 15. 发明授权
    • Water reuse system incorporating vacuum pump sealing water in a zero
discharge process
    • 在零排放过程中结合真空泵密封水的水回用系统
    • US5417809A
    • 1995-05-23
    • US298198
    • 1994-08-31
    • Roger P. HoffmanGerald O. Walraven
    • Roger P. HoffmanGerald O. Walraven
    • D21F1/48D21F1/66D21F1/76
    • D21F1/48F28C2001/006
    • A papermaking water system utilizing vacuum pump sealing water and having a zero sealing water discharge. A group of water seal vacuum pumps are used in a papermaking machine to generate subatmospheric pressure in suction equipment and thereby extract water from a wet paper web. During operation of the vacuum pumps, the sealing water is heated and the heated water is discharged to a cooling tower to cool the water which is then recirculated to the vacuum pumps. Steam from a generating plant is supplied to the dryer drums in the dryer section of the papermaking machine, and the steam condensate is combined with the heated sealing water flowing to the cooling tower. By using steam condensate as makeup water, no ionic buildup will occur in the closed system, and high quality water is withdrawn from the closed system and may be used in other sections of the papermaking machine, so that there is no discharge of sealing water to the sewer system.
    • 一种利用真空泵密封水并具有零密封水排放的造纸水系统。 在造纸机中使用一组水封真空泵,以在抽吸设备中产生低于大气压的压力,从而从湿纸幅中提取水。 在真空泵运行期间,密封水被加热并且加热的水被排放到冷却塔以冷却水,然后再循环到真空泵中。 来自发电厂的蒸汽被供应到造纸机的干燥器部分中的干燥器滚筒,并且蒸汽冷凝物与流到冷却塔的加热的密封水结合。 通过使用蒸汽冷凝水作为补充水,在封闭系统中不会发生离子聚集,并且高质量的水从封闭系统中排出,并可用于造纸机的其他部分,从而不会将密封水排放到 下水道系统。