230 PST Flashcards
Where is the treated gas overhead from the Amine Contactor sent?
a. Low Line
b. Amine Knockout Drum
c. Gathering Line
d. Flare
Amine Knockout Drum
What is the approximate Compressors second stage discharge pressure?
a. 42-psig
b. 52-psig
c. 62-psig
d. 72-psig
62-psig
Where do the liquids go that collect in the bottom of the Amine Knockout Drums?
a. Rich Amine Pumps
b. Amine Sump Tank
c. Second Stage Drips Pumps
d. Main Amine Contactor
Amine Sump Tank
At what lube oil pressure will the Compressors auxiliary lube oil pumps automatically start?
a. 20-psig
b. 25-psig
c. 30-psig
d. 35-psig
20-psig
Which of the following process variables can shut down all of the Compressors (C0001A C)?
a. Low-Low gear lube oil pressure
b. High-High suction pressure
c. High-High discharge temperature
d. Low-Low lube oil pressure
Low-Low lube oil pressure
Rich amine loading (RAL) should be maintained below what value to avoid excessive corrosion in the SRC piping and equipment? a. 2.5 mole H2S/mole amine b. 0.5 mole H2S/mole amine c. 3.5 mole H2S/mole amine d. 1.5 mole H2S/mole amine
0.5 mole H2S/mole amine
The H2S analyzer (38AI0104) measures the H2S concentration in the refinery fuel gas and is located on which of the following? a. Low Line b. High Line c. Fat Boy Line d. Fuel Gas Mixing Pot
Fuel Gas Mixing Pot
What variable is adjusted to control the Second Stage Compressor discharge temperature?
a. Bypass around the Lean Amine Coolers
b. Liquid flow from the Low Pressure Drips Drums
c. First stage discharge bypass flow around Interstage Coolers
d. Drips flow from the Interstage Knockout Drums
First stage discharge bypass flow around Interstage Coolers
What is a possible consequence of high sour water level in the Second Stage KO Drum?
a. High level in the Interstage KO Drum
b. Water contamination of drips transferred to 586 Drips Tank
c. Decreased gas flow to the Amine Contactor
d. Hydrocarbon contamination of water transferred to the SRC
Water contamination of drips transferred to 586 Drips Tank
The 230 Gas Plant Process uses three compressors to compress vapor up to approximately what pressure? a. 42-psig b. 52-psig c. 62-psig d. 32-psig
62-psig
The hydrogen sulfide (H2S) content of the regenerated amine used in the Main or Spare Amine Contactor is expressed in what unit of measure? a. Grains per gallon b. Parts per million c. Percent by weight d. Grams per milliliter
Grains per gallon
Which of the following is the physical function used to remove H2S from the compressed Low
Line gas and the high pressure High Line gas streams?
a. Combustion
b. Absorption
c. Hydrogenation
d. Stripping
Absorption
Why is the temperature of the lean amine to the Main or Spare Amine Contactor maintained at 7-10°F higher
than the feed gas temperature?
a. To prevent condensing of hydrocarbons
b. Extra heat promotes H2S removal
c. To decrease loading on the Lean Amine Cooler
d. To maintain an acceptable rich amine temperature
To prevent condensing of hydrocarbons
What is used to drive the Compressor’s Cylinder Lube Oil pumps?
a. 125-psig steam turbines
b. Electric motors
c. 550-psig steam turbines
d. Compressor shafts
Compressor shafts
Which of the following best describes the Main or Spare Amine Contactor?
a. Absorber column
b. Distillation column
c. Fractionation column
d. Extractor column
Absorber column
Which of the following process variables can ONLY shut down Compressor C0001B?
a. High-High cylinder vibration
b. High-High Interstage KO Drum level
c. Low-Low turbine gear lube oil pressure
d. Low-Low lube oil pressure
Low-Low turbine gear lube oil pressure
High pressure gas from the High Line combines with compressed gas from the Second Stage Knockout Drum prior to entering what?
a. In-service Amine Contactor
b. Second-stage Knockout Drum
c. Amine Knockout Drum
d. Low-pressure Drips Drum
In-service Amine Contactor
Where are the Low Pressure Drips Drums bottoms normally transferred to?
a. SRC and Drips tanks
b. Drips Tanks
c. In-service Second Stage KO Drum
d. Interstage KO Drums
In-service Second Stage KO Drum
What is a potential consequence of liquid carryover from the Amine Knockout Drum to the Fuel Gas Mixing pot and 236 GTR System? a. Rich amine contamination b. Over-pressuring Main Amine Contactor c. High fuel gas system pressure d. Shutdown of Sour Amine Pumps
Over-pressuring Main Amine Contactor
At what lube oil pressure will the Compressors auxiliary lube oil pumps automatically start?
a. 32-psig
b. 30-psig
c. 35-psig
d. 25-psig
32-psig
If the process inlet gas temperature to the Main or Spare Contactor is 115°F, what should the Lean Amine temperature be? a. 102 to 105°F b. 112 to 115°F c. 122 to 125°F d. 132 to 135°F
122 to 125°F
Which of the following is the physical function used to remove H2S from the compressed Low Line gas and the high pressure High Line gas streams? a. Stripping b. Hydrogenation c. Combustion d. Absorption
Absorption
High pressure gas from the High Line combines with compressed gas from the Second Stage Knockout Drum prior to entering what? a. Amine Knockout Drum b. Second-stage Knockout Drum c. In-service Amine Contactor d. Low-pressure Drips Drum
In-service Amine Contactor
What do the Lube Oil Filters for the Compressors remove from the circulating lube oil stream?
a. Debris
b. Water
c. Hydrocarbons
d. Salts
Debris
The Sour Water Pumps transfer sour water from the Second Stage Knockout Drums to which of the following? a. First Stage Knockout Drum b. Low Pressure Drips Drum c. 586 tank in Utilities d. Sulfur Recovery Complex
Sulfur Recovery Complex
What does the level controller adjust to control the level in the Main or Spare Amine Contactor?
a. Pressure in the top of the contactor
b. Rich amine release to the SRC
c. Amine from the Amine Sump Tank to the SRC
d. Amine release to the Amine Sump Tank
Rich amine release to the SRC
The Sour Water Pumps transfer sour water from the Second Stage Knockout Drums to which of the following?
a. First Stage Knockout Drum
b. Low Pressure Drips Drum
c. Sulfur Recovery Complex
d. 586 tank in Utilities
Sulfur Recovery Complex
What does the Lean Amine temperature controller (TC0005) adjust to control the temperature of
Lean Amine to the Main or Spare Amine Contactor?
a. Number of fans running on the Lean Amine Cooler
b. Overhead pressure in the Main Amine Contactor
c. Bypass around the Lean Amine Cooler
d. Release rate of rich amine from the Main Amine Contactor
Bypass around the Lean Amine Cooler
What is a potential consequence of liquid carryover from the Amine Knockout Drum to the Fuel Gas Mixing pot and 236 GTR System? a. Shutdown of Sour Amine Pumps b. High fuel gas system pressure c. Rich amine contamination d. Over-pressured Main Amine Contactor
Over-pressured Main Amine Contactor
What is the approximate Compressors second stage discharge pressure?
a. 52-psig
b. 62-psig
c. 42-psig
d. 72-psig
62-psig
Which of the following is released to the Fuel Gas Mixing Pot or the 236 GTR System?
a. Liquid hydrocarbon
b. Rich amine
c. Recycle hydrogen
d. Dry Gas
Dry Gas
Where does the treated gas flow to NEXT after exiting the Main or Spare Amine Contactor?
a. Amine Knockout Drum
b. Fuel Gas Mixing Pot
c. Gathering Line
d. First Stage Compressors
Amine Knockout Drum
Which of the following best describes what happens inside the Main or Spare Amine Contactor?
a. Gas flows upward through downward flowing amine
b. Gas flows downward through upward flowing amine
c. Amine and gas enter the bottom and separate in the flash zone
d. Amine and gas enter the top and separate in the flash zone
Gas flows upward through downward flowing amine
What controls the Compressor First Stage suction pressure?
a. First Stage Compressor speed controller
b. High line gas to the Low Pressure Drips Drums
c. Recycled second stage discharge gas
d. First Stage Compressor discharge pressure
Recycled second stage discharge gas
Other than the Fuel Gas Mixing Pot in Utilities, where can the treated gas stream from the 230 Gas plant be sent? a. 736 Coker Gas Plant b. 236 Gas Treating and Recovery c. FCCU Gas Recovery d. 737 Coker Gas Plant
236 Gas Treating and Recovery
Where is the treated gas overhead from the Amine Contactor sent?
a. Flare
b. Low Line
c. Amine Knockout Drum
d. Gathering Line
Amine Knockout Drum
The High Line collects waste gases from units that are already at what pressure?
a. 20-psig or higher
b. 35-psig or higher
c. 50-psig or higher
d. 65-psig or higher
50 pig or higher
Which flow does the temperature control valve adjust to control the temperature of amine entering the Main or
Spare Amine Contactor?
a. Cooling water through the Lean Amine Cooler
b. Lean amine to the Contactor
c. Bypass around the Lean Amine Cooler
d. Rich amine to the Sulfur Recovery Complex
Bypass around the Lean Amine Cooler
What is a possible consequence of high sour water level in the Second Stage KO Drum?
a. Decreased gas flow to the Amine Contactor
b. Hydrocarbon contamination of water transferred to the SRC
c. High level in the Interstage KO Drum
d. Water contamination of drips transferred to 586 Drips Tank
Water contamination of drips transferred to 586 Drips Tank
Which of the following is true about the operation of the Main or Spare Amine Contactor?
a. The lean amine should be warmer than the process gas
b. The process gas should be warmer than the amine
c. The amine and process gas should be the same temperature
d. Pressure is more important than temperature in controlling H2S removal
The lean amine should be warmer than the process gas
What controls the Compressor First Stage suction pressure?
a. First Stage Compressor discharge pressure
b. Recycled second stage discharge gas
c. First Stage Compressor speed controller
d. High line gas to the Low Pressure Drips Drums
Recycled second stage discharge gas
What is the normal level range maintained in the Interstage KO Drums?
a. 40 to 50%
b. 30 to 70%
c. 50 to 80%
d. 10 to 40%
10 to 40%
What is the low-low lube oil pressure trip point for the Compressors?
a. 20-psig
b. 5-psig
c. 15-psig
d. 25-psig
20-psig
Why is High Line gas not compressed in the 230 Gas Plant System?
a. Gas pressure is already sufficient to enter fuel gas system
b. Too much amine is present in the gas
c. H2S concentration of the gas is too high
d. Gas temperature is too low
Gas pressure is already sufficient to enter fuel gas system
Which of the following best describes the Main or Spare Amine Contactor?
a. Absorber column
b. Fractionation column
c. Distillation column
d. Extractor column
Absorber column
The Sour Amine (rich amine) Pumps discharge joins the discharge of what other pump(s)?
a. Amine Sump Pump
b. Second Stage Drips Pumps
c. Sour Water Pumps
d. Low Line Drips Pumps
Amine Sump Pump
Whether a refinery process releases vapor to the Low Line or the High Line depends on what?
a. Temperature at which it is released
b. Pressure at which it is released
c. Location of the process
d. Ambient temperature
Pressure at which it is released
Where is the liquid hydrocarbon from the Second Stage Knockout Drums transferred to?
a. Sulfur Recovery Complex
b. 586 Tank in Utilities
c. Low Pressure Drips Drums
d. Main or Spare Amine Contactor
586 Tank in Utilities
Which of the following is true about the operation of the Main or Spare Amine Contactor?
a. Pressure is more important than temperature in controlling H2S removal
b. The amine and process gas should be the same temperature
c. The process gas should be warmer than the amine
d. The amine should be warmer than the process gas
The amine should be warmer than the process gas
Low Line gas enters the 230 Gas Plant at approximately what pressure?
a. 6.5-psig
b. 4.5-psig
c. 2.5-psig
d. 0.5-psig
0.5-psig
What equipment is used to cool the First Stage Compressors discharge gas temperature?
a. Interstage Coolers
b. Low Line Gas Coolers
c. Second Stage Condensers
d. Lean Amine Cooler
Interstage Coolers
What do the Lube Oil Filters for the Compressors remove from the circulating lube oil stream?
a. Salts
b. Debris
c. Water
d. Hydrocarbons
Debris
What variable is adjusted to control the hydrocarbon (interface) level in the Second Stage Knockout Drums?
a. Flow of liquid hydrocarbons to 586 Tank
b. Amount of drips flowing to the Second Stage Knockout Drum
c. Flow of low line gas to the Low Line Gas Cooler
d. Amount of drips flowing to the Low Pressure Drips Drum
Flow of liquid hydrocarbons to 586 Tank
What does the Lean Amine temperature controller (TC0005) adjust to control the temperature of Lean Amine
to the Main or Spare Amine Contactor?
a. Number of fans running on the Lean Amine Cooler
b. Bypass around the Lean Amine Cooler
c. Overhead pressure in the Main Amine Contactor
d. Release rate of rich amine from the Main Amine Contactor
Bypass around the Lean Amine Cooler
Which of the following best describes the Compressors (C0001A-C)?
a. Multi-stage centrifugal
b. Liquid ring seal
c. Oil filled, dual rotor, rotary screw
d. Two-stage reciprocating
Two-stage reciprocating
What is the single waste stream produced by the 230 Gas Plant System?
a. Drips
b. Sour water
c. 125-psig steam
d. Rich amine
Sour water
The High Line collects waste gases from units that are already at what pressure?
a. 50-psig or higher
b. 65-psig or higher
c. 35-psig or higher
d. 20-psig or higher
50-psig or higher
Other than the Fuel Gas Mixing Pot in Utilities, where can the treated gas stream from the 230 Gas plant be sent? a. 737 Coker Gas Plant b. 236 Gas Treating and Recovery c. 736 Coker Gas Plant d. FCCU Gas Recovery
236 Gas Treating and Recovery
What can happen if the level in the Low Pressure Drips Drums gets too high?
a. Compressor will shut down
b. Interstage Knockout Drum will be bypassed
c. Second-stage Knockout Drum will run dry
d. High process gas flow to the Main or Spare Amine Contactor
Compressor will shut down
Which of the following is released to the Fuel Gas Mixing Pot or the 236 GTR System?
a. Recycle hydrogen
b. Rich amine
c. Liquid hydrocarbon
d. Dry Gas
Dry Gas
What is the purpose of demister pads in the Low Pressure Drips Drums?
a. Allows gas to exit the bottom of the drum
b. To remove any H2S in the gas
c. Regulate the gas flow to the compressors
d. Remove entrained liquid from the gas
Remove entrained liquid from the gas
