Patent · US Expired

Hydraulic vessel system having a downwardly feeding separator

US6325889A · kind A · utility

2Cited by

5References

6Claims

0Family size

Assignee

Kvaerner Pulping AB · SE

Inventors

Vidar Snekkenes · Karlstad, SE
Johan Engstrom · Handen, SE
Sven-Erik Ohlsson · Kil, SE
Per Johan Anders Nyström · Karlstad, SE
Soren Soderqvist · Karlstad, SE
Bjorn Karlsson · Lund, SE

Key dates

Filing date	Dec 14, 2000
Grant date	Dec 4, 2001
Priority date	—
Expiry date	Dec 14, 2020

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C7/14
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy and at the same time achieve very good pulp properties. The digesting process includes a top separator that separates the transport liquid from the fiber material and permits the fiber material to be exposed to the cooking liquid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.