Patents Assigned to PEC-TECH ENGINEERING AND CONSTRUCTION PTE LTD
  • Publication number: 20130098569
    Abstract: A method and system for pulp manufacturing used in connection with a kraft process includes a vertical pressure vessel operated in batch mode, a single-vessel or multi-vessel continuous digester, and other equipment for further processing brown stock, such as for washing, oxygen delignification, bleaching, and drying. A feeder and conveyance system may include a high pressure feeder or direct pump system, and selectively provides fiber-containing material to the continuous digester when making lower grade pulp product and to the vertical pressure vessel when making higher grade pulp such as dissolving pulp. The vertical pressure vessel is used for pre-hydrolysis and neutralization, after which the resulting pulp is fed to the continuous digester for cooking. White liquor and black liquor from the same mill may be used for the neutralization fluids. The same continuous digester is selectively used for cooking in connection with making pulp products of different grades or quality.
    Type: Application
    Filed: April 6, 2012
    Publication date: April 25, 2013
    Applicant: PEC-TECH ENGINEERING AND CONSTRUCTION PTE LTD
    Inventors: Richard Constantine van Lee, Alagaratnam Joseph Devanesan