Company founded 1975 US-based machinery business experienced in worldwide sales.

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Arti, Wet Plant Design and Operation

Description

  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: voltage 20 kv, fluctuation of voltage ≤ ± 10%, rated frequency 50 hz, fluctuation of frequency ≤ ± 3%. 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: pressure 3.0 to 5.0 bar g, temperature 29 °c, total hardness 12 °dh, turbidity 10 degree.
    3. Fuel oil: type methan, gross calorific value approx. 38,100 kj/smc.
  5. Energies and Utilities Inside Plant Border
    1. Electrical energy: rated voltage 3 x 380 v ac with pe and loadable neutral line, fluctuation of voltage max. 10%, control voltage 24 v dc res. 230 v ac, rated frequency 50 hz, fluctuation of frequency ± 1.5% / short term ± 2.0%.
    2. Cooling water: pressure (at floor 0.0 m) 3.0 to 5.0 bar g, temperature (supply) 33 °c, temperature (return) 40.5 °c, total hardness 12 °dh, turbidity 10 degree. To avoid corrosion, slime and deposit problems caused by micro biological growth, the cooling water should be treated with corrosion inhibitors and micro biocides.
    3. Soft water: pressure (at floor 0.0 m) 3.0 to 5.0 bar g, temperature 30 °c, chloride 40 ppm, total hardness 2 °dh.
    4. Chilled water: pressure 3.0 to 5.0 bar g, fluctuation of pressure ± 0.5 bar, temperature (supply) 6 °c, temperature (return) 12 °c, ph at 20 °c 6.5 to 7.5, total hardness 6 °dh, conditions: free of solid impurities.
    5. Hot water: pressure 3.0 to 5.0 bar g, temperature (supply) approx. 60 °c.
    6. Compressed air: pressure 2.0 to 3.0 bar g, humidity content (pressure dew point) + 4 °c, temperature 15 to 30 °c (room temperature), conditions: oil free, free of any solid impurities.
    7. Instrument air: pressure 7.0 to 7.5 bar g, fluctuation of pressure ± 10%, humidity content (dew point at atmospheric pressure) - 25 °c, temperature 15 to 30 °c (room temperature), conditions: free of oil (technical standard) and any solid impurities.
    8. Nitrogen: pressure gauge 7.0 to 7.25 bar, n²-content 98% vol., temperature 15 to 30 °c (room temperature), humidity content (dew point at atmospheric pressure) -30 °c.
    9. Heat transfer oil: type synthetic diatermic oil, 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.; exhaust air max. 29 °c.
    5. Control room / dcs-system and electrical board room (mcc, inverters): winter 23 ± 2.0 °c, 65% ± 6.0% r.h.; summer 26 ± 2.0 °c; exhaust air max. 32 °c.
    6. Chemical laboratory: 22 to 25 °c, ≤ 70% r.h.
    7. Textile laboratory: 20 ± 0.5 °c, 65 ± 1.5% r.h.
    8. End product storage: natural ventilation.
  7. Consumption of Feed Materials and Emerging Waste
    1. Based on a name plate capacity of 4,500 t/a resp. approx. 12.8 t/24h yarn (spandex).
    2. Raw materials and product: polyol (pthf) 3,480.12 tons/year, 9,943.52 kg/24h; diphenylmethane-diisocyanate (mdi) 738.36 tons/year, 2,109.60 kg/24h; amines 88.83 tons/year, 253.8 kg/24h; 97.02 tons/year, 277.2 kg/24h.