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Buhler, Solid State Polycondensation Lines, 1995/1997, 45 T/D to 76.8 T/D Capacity, PET Bottle Grade Resin

Description

  1. Overview
    1. Two technological lines for the manufacturing (additional polycondensation) of bottle grade pet resin used in the production of pet bottles for beverages.
    2. Based on solid state polycondensation technology developed by the Swiss firm Buhler.
    3. Production process depends on thermal treatment of the raw material (amorphous pellets of initial iv about 0.6 dl/g) in the equipment of the lines.
    4. Lines consist of five basic process loops each, where the material is treated by temperature in specified conditions for a certain period of time.
    5. During processing amorphous material, its molecular weight changes to the value expected for bottle grade, or higher, up to 1.0 dl/g.
    6. Ability to process r-pet materials on these lines as well.
    7. Beside standard bottle grade, experience processing r-pet and fiber grade homo-polymers to values 0.96 – 0.1.
  2. Daily Capacity
    1. 45 t/d to 60 t/d.
    2. Nominal capacities increased: line 45 up to 60 t/d and line 60 up to 76.8 t/d.
  3. Main Process Loops
    1. Precrystallization.
    2. Crystallization.
    3. Preheating.
    4. Polycondensation.
    5. Cooling.
  4. Characteristic Data
    1. Technology: Switzerland.
    2. Daily capacity (throughput) after increasing: 60 t/d for ssp 45 and 76.8 t/d for ssp 60.
    3. Line 45 t/d put into operation in 1995.
    4. Line 60 t/d put into operation in 1997.
  5. Unit 1 – Main Buildings
    1. Two main buildings where both lines are placed.
    2. Lines equipped with electrical system.
    3. Lines equipped with nitrogen feeding system.
    4. Lines equipped with compressed air system.
    5. Lines equipped with cooling water system.
    6. Lines equipped with drinking water system.
    7. Lines equipped with lightning protection system.
  6. Unit 2 – Integrated Objects
    1. Two steering rooms.
    2. Two trafo stations.
    3. Two switching stations for low voltage.
    4. Social rooms.
    5. One level buildings of traditional construction.
  7. Unit 3 – Raw Material Silo Station and Storage
    1. Raw material silo station.
    2. Two umbrella roofs for storage.
  8. Unit 4 – Final Product Silo Stations
    1. Final product silo station for ssp 45 t/d.
    2. Final product silo station for ssp 60 t/d.
  9. Main Equipment for Each Line
    1. Precrystallizer.
    2. Crystallizer.
    3. Preheater.
    4. Reactor.
    5. Cooler.
    6. Nitrogen filter.
    7. Nitrogen dryer.
    8. Main nitrogen blower.
    9. Blowers for precrystallization and crystallization loops, preheater and final product cooler.
    10. Pt-catalyst with steering panel.
    11. Hot conveying loop blower.
    12. Cyclones.
    13. Big bag weighing station and set of silo for the final product with an option to fill big-bag and loading auto-silo-trucks.
    14. Raw material station and one silo for the raw material amorphous resin with an option to unload silo-trucks and big bags.
    15. Cooling water system with two water coolers, pumps and water gathering container with air coolers.