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Atmospheric Distillation Units

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Unit Description

Alexandria Petroleum Company have three diatillation units with total capacity about 5 million tons per year. The very old distillation unit (1) with a capacity of 0.25 million tons per year is demolished due to safety reasons and high runing costs.

Atmospheric Distillation Unit (2), ADU #2

Established in 1961 with refinement capacity of 1 million tone per year based on Ras Shokier crude oil. It designed by Techno - Export Company -- Cheque Republic.


Many modifications have been implemented:


  Revamp to increase capacity, improve product specifications and energy conservation .
        Replaced 1/3 of the main fractionation tower & its internals bubble cap trays.
        Add new water condensers.
        Rearrangement the heat train of heat exchanger .
  Revamping the desalter to increase the salt removal efficiency from crude oil in order to decrease corrosion and salt precipitation by Howmmar - UK.
  Replaced the old furnace to new vertical cylindrical one by Chiyoda - Japan.
  Replaced the controlling system to a new digital Control System " DCS "by Rosemount - USA.
  Replacement of "Rosemount-USA" digital control system " DCS " by a more advanced one "Honeywell - USA"

After 44 years of operation and due to previous modifications and preventative maintenance, the capacity of ADU#2 has been increased to about 1.68 million tons per year based on Western Desert Mixture crude oil.

Atmospheric Distillation Unit (3), ADU #3

Established in 1970 with refinement capacity of 1 million tons per year based on Ras Shokier crude oil. It designed by Techno - Export Company -- Cheque Republic.
Many modifications have been implemented to increase capacity, improve products specifications and energy conservation.


  Changed burners from side burners to bottom ones.
  Changed the old compressors to two new compressors from Dresser Rand - UK .
  Revamping the desalter to increase the salt removal efficiency from crude oil in order to decrease corrosion and salt precipitation by Howmmar - UK.
  Revamping furnace to raise its thermal efficiency by adding balanced draft system with a new stack by Kirchner - Italy.
  Replaced the controlling system to a new Digital Distribution control" DCS " by Yokogawa (2007).
  A complete study " Basic Engineering " of revamping the unit to raise the capacity by 25% by STP - Italy.


The previous modifications and preventative maintenance helped to increased the capacity of the unit to about 1.5 mm ton/year based on Western Desert Mixture crude oil.

Atmospheric Distillation Unit (4), ADU #4

Started in 1982 with a designed capacity of 1.84 mm ton/year based on Light Arabian crude oil. It designed by Enppi - Egypt.


But ADU#4 never processed by Light Arabian crude oil and it has to process Egyptian Balyieum crude oil with a large change in the percentage of products, So many modifications had to be implemented from the first day of operation to increase capacity, improve products specifications and energy conservation.


  Modification and rearrangement of heat train of heat exchangers.
  Revamping the desalter to increase the salt removal efficiency from crude oil in order to decrease corrosion and salt precipitation by Howmmar - UK.
  Replaced the controlling system to a new Digital Control System " DCS " by Rosemount - USA
  Replacement of "Rosemount-USA" digital control system " DCS " by a more advanced one "Honeywell - USA"

 

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