ApplicationNo. 744857 filed on 11/04/1996
US Classes:162/52, Charging and/or discharging fibrous material162/56, With squeezing, compression, rubbing, kneading162/237, Continuous162/241, Plural162/246Charging and/or discharging means (including blow pits)
ExaminersPrimary: Czaja, Donald E.
Assistant: Leavitt, Steven B.
Attorney, Agent or Firm
International ClassD21C 007/06
AbstractA number of distinct parallel digesters are fed with chips from a common steaming vessel. After steaming the chips are slurried and pressurized, and substantially simultaneously the steamed, slurried, and pressurized chips are transferred to at least some of (and typically each of) the distinct parallel digesters. A material stream is split into a number of individually controllable material streams (one for each of the digesters) either at the discharge from the steaming vessel, after slurrying (or at the discharge from a slurrying vessel), or after pressurizing (e.g. in a high pressure transfer device). For example a multi-branch conduit may be connected to the slurry outlet from the high pressure transfer device, the conduit having a branch directly connected to each of the digesters. A distinct return conduit may also be provided from each of the digesters to the high pressure transfer device, each return conduit preferably has a distinct flow control device and/or pump which are individually controlled.
Field of SearchContinuous chemical treatment or continuous charging or discharging
With compression, squeezing or compacting of fibrous material during charging
Plural diverse stage treatment
Charging and/or discharging fibrous material
With squeezing, compression, rubbing, kneading
Charging and/or discharging means (including blow pits)