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VPS 5 > Raw Crude System > Flashcards

Raw Crude System Flashcards

1
Q

What does the raw rude system take in?

A
  • Crude Oil
  • Sponge Oil
  • Slop Oil
  • Crude Tank Water Draw
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2
Q

What are chemicals used in the raw crude system?

A
  • Water Soluble Demulsifier
  • Oil Soluble Demulsifier
  • Caustic
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3
Q

What are outputs of the raw crude system?

A

• Desalted Crude

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4
Q

What are waste streams of the raw crude system?

A

• Oily Brine

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5
Q

What is the purpose of the desalters?

A

To remove salts and sediments

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6
Q

What is the purpose of the electric grids in the desalters?

A

They cause the water droplets to form larger drops, making them easier to fall out of the crude.

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7
Q

What is the purpose of injecting water soluble demulsifier into the inlet of the 1st stage of the desalters?

A

This injection prevents high oil content in the effluent brine discharged from the 1st Stage Desalter

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8
Q

What is the purpose of injecting oil soluble demulsifier upstream of the raw crude charge pumps?

A

This is done to keep emulsion problems from occurring inside the desalters

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9
Q

What all is injected at the suction of the raw crude charge pumps?

A

Sponge Oil
Slop Oil
Oil Soluble Demulisfier

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10
Q

What are the numbers of the raw crude regulators?

How are the flows split between the two? Why?

A

10004A, 10004B

Evenly, To help maintain the level in the flash drum

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11
Q

What is the temperature of the raw crude entering the unit?

A

Ambient temperature

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12
Q

What is the tempature of the raw crude after the raw crude exchangers?

A

300 degrees

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13
Q

Why is the crude heated before going to the desalters?

A

The crude must be at higher temperature to maximize the effectiveness of the desalters by improving water/oil separation

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14
Q

Why is caustic injected after the second stage desalters?

A

This is done to combat possible presence of HCl , a strong acid. This acid forms from decomposition of salt (NaCl), which can corrode the overhead system of the crude and vacuum tower.

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15
Q

How many exchangers are in Train 1?

A

13

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16
Q

How many exchangers are in Train 2?

A

16

17
Q

How do the exchangers flow on the D structure?

A

From top to bottom

18
Q

What is the order of the exchangers for Train 1?

A
  • 2 Hot Acc. OVHD 101 / 102
  • 4 CDU OVHD 105-106
  • 2 MCR 007 / 008
  • 1 Kerosene 009
  • 4 HAGO 137 / 015 / 151 / 150
19
Q

What is the order of the exchangers for Train 2?

A
  • 2 Hot Acc. OVHD 103 / 104
  • 4 CDU OVHD 109-112
  • 4 MVGO 010 & 011 / 129 & 130
  • 4 HVGO 012 & 122 / 123 & 124
  • 2 Diesel 013 / 014
20
Q

What is the purpose of the inline mixers before the inlet of every desalter?

A

To create on emulsion

VPS 5 (3 decks)

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