Kraft Hardwood Bleached Pulp Mill, 130 ADT/Day, Kamyr Continuous Digester, ABB DCS 800xA

Description

  1. Overview
    1. Kraft hard wood bleached pulp mill with a production rate of 130 adt/day.
    2. Process is highly automated with a modern DCS 800xa of abb, with abb, metso, naf instrumentation.
  2. Digester
    1. Kamyr continuous digester, 1.5 m diameter x 18 m height, descendant flow.
    2. Includes a pre-impregnation stage.
    3. Feeders: chip bin, chip meter, low pressure feeder, high pressure feeder.
  3. Pulp cleaning and screening
    1. Unbleached pulp is cleaned in a centrifugal stage.
    2. Two stages of pressure screens and washing filters.
  4. O2 delignification
    1. O2 delignification stage with soda addition and two washing filters.
  5. Bleaching
    1. Final bleaching stage is peroxide based with addition of chelants and ph control.
    2. Includes a filter, three bleaching ascendant towers, a final thickener, and stock tower.
  6. Evaporation
    1. Evaporation system included.
  7. Recovery boiler
    1. Recovery boiler with 4 liquor guns, one smelt spout, 7 soot blowers clyde bergemann, electrostatic precipitators alstom epic.
  8. Causticizing and lime kiln
    1. Causticizing and lime kiln included.
  9. Chipper
    1. Chipper capacity: 72 m3/h.
    2. Chipper cartridge 85.
    3. Chipper cartridge 88, drive upgraded to acs800 abb and an ac induction motor of 710 kw.
  10. Key equipment brands
    1. Pumps: sulzer, ksb, nash.
    2. Motors and electric components: abb.
    3. Gearboxes: sew, bonfigliolli, flender.
    4. Coupling: rexnord, flender.
    5. Pneumatic: festo.
    6. Instrumentation: abb, metso, e+h, foxboro.