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Plant Design and Operation Specifications, PTMEG-PTHF / Pure MDI / DMAC

Description

  1. Raw Materials, Energies, And Utilities
    1. Raw Materials
      1. Ptmeg-pthf / polytetrahydrofuran (polyol): specified in due course.
      2. Pure mdi / 4,4-diphenylmethane diisocyanate: specified in due course.
    2. Solvent
      1. Dmac / n,n,-dimethylacetamide: specified in due course.
    3. Additives
      1. Specified in due course.
    4. Energies And Utilities At Site Border
      1. Electrical Energy (Typical)
        1. Voltage: 20 kv.
        2. Fluctuation of voltage: ≤ ± 10 %.
        3. Rated frequency: 50 hz.
        4. Fluctuation of frequency: ≤ ± 3 %.
        5. Electrical energy has to be made continuously available. If short skips, interruptions or longer breakdowns could happen at plant site, emergency power supply is necessary. Dependent on frequency and duration of power interruptions, the emergency power supply has to be designed either for critical items only or for the total plant.
      2. Industrial Water
        1. Pressure: 3.0 to 5.0 bar g.
        2. Temperature: 29 °c.
        3. Total hardness: 12 °dh.
        4. Turbidity: 10 degree.
      3. Fuel Oil
        1. Type: methan.
        2. Gross calorific value: approx. 38,100 kj/smc.
    5. Energy And Utilities Inside Plant Border
      1. The following energies and utilities have to be available uninterruptedly at constant conditions at battery limit.
      2. Electrical Energy
        1. Rated voltage: 3 x 380 ac, pe and loadable neutral line.
        2. Fluctuation of voltage: max. 10 %.
        3. Control voltage: 24 dc res. 230 ac.
        4. Rated frequency: 50 hz.
        5. Fluctuation of frequency: ± 1.5 % / short term ± 2.0 %.
      3. Cooling Water
        1. Pressure (at floor 0,0 m): 3.0 to 5.0 bar g.
        2. Temperature (supply): 33 °c.
        3. Temperature (return): 40.5 °c.
        4. Total hardness: 12 °dh.
        5. Turbidity: 10 degree.
        6. To avoid corrosion, slime and deposit problems caused by micro biological growth, the cooling water should be treated with corrosion inhibitors and micro biocides.
      4. Soft Water
        1. Pressure (at floor 0,0 m): 3.0 to 5.0 bar g.
        2. Temperature: 30 °c.
        3. Chloride: 40 ppm.
        4. Total hardness: 2 °dh.
      5. Chilled Water
        1. Pressure: 3.0 to 5.0 bar g.
        2. Fluctuation of pressure: ± 0.5 bar.
        3. Temperature (supply): 6 °c.
        4. Temperature (return): 12 °c.
        5. Ph at 20 °c: 6.5 to 7.5.
        6. Total hardness: 6 °dh.
        7. Conditions: free of solid of impurities.
      6. Hot Water
        1. Pressure: 3.0 to 5.0 bar g.
        2. Temperature (supply): approx. 60 °c.
      7. Compressed Air
        1. Pressure: 2.0 to 3.0 bar g.
        2. Humidity content (pressure dew point): + 4 °c.
        3. Temperature: 15 to 30 °c (room temperature).
        4. Conditions: oil free, free of any solid of impurities.
      8. Instrument Air
        1. Pressure: 7.0 to 7.5 bar g.
        2. Fluctuation of pressure: ± 10 %.
        3. Humidity content (dew point at atmospheric pressure): - 25 °c.
        4. Temperature: 15 to 30 °c (room temperature).
        5. Conditions: free of oil (technical standard) and any solid of impurities.
      9. Nitrogen
        1. Pressure gauge: 7.0 to 7.25 bar.
        2. N²-content: 98 % vol.
        3. Temperature: 15 to 30 °c (room temperature).
        4. Humidity content (dew point at atmospheric pressure): -30 °c.
      10. Heat Transfer Oil
        1. Type: synthetic diatermic oil.
        2. Temperature, supply: max. 330 °c.
    6. Air Conditions
      1. Raw material handling: special conditions.
      2. Polymerisation: forced ventilation.
      3. Spinning room (exhaust air): max. 45 °c.
      4. Draw-off / take-up room supply air: 23 ± 2.0 °c, 65 % ± 5.0 % r.h.
      5. Draw-off / take-up room exhaust air: max. 29 °c.
      6. Control room / dcs-system and electrical board room (mcc, inverters) winter: 23 ± 2.0 °c, 65 % ± 6.0 % r.h.
      7. Control room / dcs-system and electrical board room (mcc, inverters) summer: 26 ± 2.0 °c.
      8. Control room / dcs-system and electrical board room (mcc, inverters) exhaust air: max. 32 °c.
      9. Chemical laboratory: 22 to 25 °c, ≤ 70 % r.h.
      10. Textile laboratory: 20 ± 0.5 °c, 65 ± 1.5 % r.h.
      11. End product storage: natural ventilation.
    7. Consumption Of Feed Materials And Emerging Waste
      1. Following tables are based on a name plate capacity of 4,500 t/a resp. approx. 12.8 t/24h yarn (spandex).
      2. Raw Materials And Product
        1. Polyol (pthf): 3480.12 tons/year, 9943.52 kg/24h (on an average).
        2. Diphenylmethane-diisocyanate (mdi): 738.36 tons/year, 2109.60 kg/24h (on an average).
        3. Amines: 88.83 tons/year, 253.8 kg/24h (on an average).
        4. Amines: 97.02 tons/year, 277 kg/24h (on an average).