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Steam Packing System

Installation of a Steam Packing System can increase the production of an individual digester by 15 to 25%. Steam packing systems consist of Steam Packers (one for each digester) and an Air Evacuation System (one for each set of digesters).

Steam packing is a method of distributing the chips evenly in the digester. As the chips enter the digester, the steam jets accelerate and spread the chips. This causes the chips to be distributed evenly around the digester cross-sectional area. At the same time, the chips are steamed with low pressure steam which causes an increase in temperature of the digester before heat up. An air evacuation system is used in conjunction with the steam packer. As the chips enter the digester, the air evacuation system removes the air and gases from the digester through center screens or through a separate nozzle.

  • Low pressure steam packing
  • Optimum and uniform packing degree
  • Better circulation and more uniform cooking
  • Increased digester temperature before heat-up
  • Air evacuation to ensure smooth chip flow and collection of odorous gases
  • Steam packing results in a higher packing density
    • Increased production
    • Digester charge can be increased by up to 15-25% through packing
  • Chips enter in tangential motion and drop in a spiral motion
    • Flat bed of chips formed instead of conical profile
    • Uniform packing eliminates “shotcuts” and channeling for liquor through chips
  • Increases digester production by increasing the compaction of chip column
  • Promotes better circulation and therefor more uniform cooking
  • Improves liquor penetration
  • Reduces knots and screen rejects and provides more uniform chip moisture
  • Reduces digester relief gas volume
  • Cleaner chip filling operation
general requests

Steam Packing System

Installation of a Steam Packing System can increase the production of an individual digester by 15 to 25%. Steam packing systems consist of Steam Packers (one for each digester) and an Air Evacuation System (one for each set of digesters).

  • Further Details

    Steam packing is a method of distributing the chips evenly in the digester. As the chips enter the digester, the steam jets accelerate and spread the chips. This causes the chips to be distributed evenly around the digester cross-sectional area. At the same time, the chips are steamed with low pressure steam which causes an increase in temperature of the digester before heat up. An air evacuation system is used in conjunction with the steam packer. As the chips enter the digester, the air evacuation system removes the air and gases from the digester through center screens or through a separate nozzle.

  • Technical Information

    • Low pressure steam packing
    • Optimum and uniform packing degree
    • Better circulation and more uniform cooking
    • Increased digester temperature before heat-up
    • Air evacuation to ensure smooth chip flow and collection of odorous gases

  • Benefits

    • Steam packing results in a higher packing density
      • Increased production
      • Digester charge can be increased by up to 15-25% through packing
    • Chips enter in tangential motion and drop in a spiral motion
      • Flat bed of chips formed instead of conical profile
      • Uniform packing eliminates “shotcuts” and channeling for liquor through chips
    • Increases digester production by increasing the compaction of chip column
    • Promotes better circulation and therefor more uniform cooking
    • Improves liquor penetration
    • Reduces knots and screen rejects and provides more uniform chip moisture
    • Reduces digester relief gas volume
    • Cleaner chip filling operation

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