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Babcock, Bleaching Range, 1989, 1800mm Fabric Width, Continuous Singeing/Desizing/Bleaching

Description

  1. Overview
    1. Fully continuous singeing, desizing, and bleaching operation.
    2. Technology: enzymatic desize with double peroxide bleaching.
    3. Bleaching process carried out in two tight strand / roller bed steamers.
    4. Machine for processing flat woven cotton and polyester / cellulose blends.
    5. Roller width of 2000 mm.
    6. Maximum fabric width 1800 mm.
    7. Fabricated from stainless steel with infrastructure made of painted mild steel.
    8. DC motors and drives with Siemens and Mentor controllers.
    9. Mangles are all pneumatic air activated.
    10. Fabric tension system by compensator rollers with compressed air pressure control at each wash box nip point.
    11. Operation is semi-automatic manual control.
    12. All wash boxes / saturators are mangle separated, with steam heated automatic temperature control.
    13. Convitex boxes are vertically threaded (18 mts).
    14. Hydrotex boxes are horizontally threaded (30 mts / zone) cascade washers with pump-circulated liquor.
  2. Entry And Singeing Section
    1. Entry guiders – Erhardt and Leimer – air controlled.
    2. Entry scray – maximum content 700 mts.
    3. Ostoff brushing unit.
    4. Ostoff dual head gas singeing unit with extraction, back and face singeing threading option, can burn either LPG or natural gas.
  3. Desize And First Bleach Application
    1. One Convitex impregnation box for enzyme desize application.
    2. One skying zone of 50 mts for desize reaction time.
    3. Two Convitex wash boxes with counter flow.
    4. One newly (2008) installed Benninger Benextractor impregnation box.
    5. Full flow meter control of as-supplied concentrated bleaching chemicals: hydrogen peroxide, caustic soda, detergent, stabilising and complexing agents.
  4. First Steamer
    1. Steamer erected overhead with 80 mts of tight strand threading.
    2. A roller bed giving a 12-minute dwell time at design speed.
    3. Saturated steam condition maintained by a de super heater and “lick” roller boosters.
  5. First Wash And Second Bleach Application
    1. Two Convitex wash boxes.
    2. One double zone Hydrotex wash box with counter flow.
    3. Batching arm for a frame rollers.
    4. One Convitex wash box.
    5. One Convitex wash box / impregnator with semi-automatic Polykomat dosing of “premixed” bleaching chemicals.
  6. Second Steamer
    1. Steamer identical in specification to item 3 above.
  7. Final Wash Section
    1. One single zone Hydrotex wash box.
    2. One double zone Hydrotex wash box.
    3. With high pressure exit nip.
  8. Drying And Exit Section
    1. Over-head drying zone with 24 steam heated drying cylinders and extraction hood.
    2. 2 water-cooled cooling cylinders.
    3. Exit scray maximum content 700 mts.
    4. Erhardt and Leimer guiders.
    5. One angled inspection frame.
    6. Double batching arms for a frame rollers.