Friday, February 20, 2015

MILL DESIGN - STERILISATION

Key points to consider for design of sterilisation station ;
  • steam required - 272.5 kg steam per MT FFB or 600 lb per MT FFB (1 kg = 2.2 lb)
  • steam velocity - 30 to 50 meter per second
  • specific volume of steam - 0.461 m3/kg @ 45 psig
  • specific volume of steam - 0.496 m3/kg @ 40 psig
  • mean specific volume of steam - 0.4785 m3/kg
  • back pressure - 45 psig (3.06 bar)
  • steriliser pressure - 40 psig (2.72 bar)
  • steriliser shell thickness - 16 mm MS plate or 0.6298 in
  • steriliser liner thickness - 12 mm MS plate or 0.4723 in
  • steriliser service factor - 1.20
  • pressure safety factor - 1.50
  • sterilisation time - 60 minutes
  • sterilisation cycle time - 75 minutes

Source - Masrawana Mohd. Masran's Collection