Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

636 HDS Study Questions > Lesson 3 Feedback Exercises > Flashcards

Lesson 3 Feedback Exercises Flashcards

1
Q

What best describes the purpose of the Reaction Subsystem?

A

Convert undesirable sulfur and nitrogen compounds in the feed to hydrogen sulfide and ammonia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the following is NOT a feed stream to the Reaction Subsystem?

A

a. 536 Crude Unit HVGO
B. 736 COKER LIGHT GAS OIL (LGO)
c. 537 Crude Unit (MVGO)
d. 737 Coker Heavy Gas Oil (HGO)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The natural gas blanket on the Feed Surge Drum prevents ________ from entering the drum and provides sufficient suction pressure for the Charge Pumps.

A

oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

A portion of the reactor feed stream can bypass the Feed/Reactor Effluent Exchangers, as needed, to control the ______ ________ inlet temperature.

A

Hot Separator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The Charge Heater ________ ________ controller adjusts the amount of fuel gas to the heater to obtain the desired heater outlet temperature.

A

Outlet temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the purpose of the heating coils located in the upper section of the Charge Heater convection section?

A

To preheat boiler feed water (BFW) and feed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The 636 Reactor utilizes ________ separate beds of either Nickel Molybdenum or Cobalt Molybdenum catalyst.

A

Four

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is the temperature increase across the 636 Reactor controlled?

A

Quench hydrogen at #3 and #4 catalyst bed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

The Hot Separator bottoms liquid stream is used as heat medium in the _______ _______ ________ before flowing to the Stripper for H2S and light ends removal

A

Diesel Stripper Reboiler

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following is NOT a source of wash water to the Condensate Surge Drum?

A

a. Refinery condensate
b. Stripped sour water from the Sour Water Stripper
c. Sour water from the Product Fractionator Receiver
D. SOUR WATER FROM THE PRODUCT SEPARATOR

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following is NOT a condition that will shutdown the Charge Heater?

A

A. LOW-LOW PILOT GAS PRESSURE

b. Loss of total recycle gas flow
c. Low-low fuel gas pressure
d. Loss of both recycle gas and heater pass feed flow to any heater pass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The purpose of the Compression Subsystem is to increase the pressure of the make-up and recycle gas streams and remove ________ ________ from the recycle gas stream from the Reaction Subsystem.

A

Hydrogen sulfide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of the following is NOT a source of make-up gas to the 636 Compression Subsystem?

A

a. 633 HDS recycle gas
b. Plant hydrogen header
C. 632 HDS RECYCLE GAS
d. Recovered hydrogen from the Membrane Separator Filters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the purpose of the Make-up Gas Compressors (C0002A/B)?

A

Increase the pressure of make up hydrogen to the suction pressure of the Recycle Compressor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Recycle gas from 633 HDS is routed to the ________-stage suction of the Make-up Gas Compressors.

A

2nd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What medium is used to cool the Make-up Gas Compressors second-stage discharge stream before it enters the Make-up Gas Third-Stage Suction Drum?

A

Cooling Water

17
Q

The pressure of the make-up gas is increased to approximately ________-psig in the third-stage of the Make-up Gas Compressors

A

1300 PSIG

18
Q

What is the purpose of the spillback stream from each stage of the Make-up Gas Compressors?

A

For pressure control

19
Q

In the Recycle Gas Scrubber, ________ ________ is used to remove H2S from the recycle gas stream.

A

Lean Amine

20
Q

The purpose of the Membrane Separation Filter System is to control the purity of the process gas by separating ________ from other gases in the recycle gas stream.

A

Hydrogen

21
Q

Waste gas from the Membrane Separation Filters is routed to the ________ ________ ________ in the Stripping Subsystem.

A

Off Gas Scrubber

22
Q

The Recycle Compressor (C0001) is a ________-stage centrifugal compressor that provides all of the process gas requirements for the Reaction Subsystem.

A

3 stage

23
Q

The spillback from the Recycle Gas Compressor discharge is routed to the ________ ________ ________ ________ in the Reaction Subsystem.

A

Hot Separator Vapor Condensers

24
Q

The Stripping Subsystem strips and separates entrained H2S, NH3, hydrogen, and ________ ________ from the hydrocarbon liquid streams from the Hot Separator and Product Separator in the Reaction Subsystem.

A

light hydrocarbons

25
Q

The stripping medium used in the Product Stripper is ________ ________ ________.

A

125 psig steam, (medium pressure steam)

26
Q

The Stripper overhead is cooled in the Stripper Condensers and the ________ ________ ________.

A

Stripper Trim Condensers

27
Q

What is the purpose of the Stripper Receiver?

A

Provides residence time for the cooled Stripper overhead stream to phase separate into hydrocarbon liquid, sour water, and off gas.

28
Q

The feed gas to the Stripper Off-Gas Scrubber is a combination of Stripper Receiver off gas and waste gas from the:

A

A. MEMBRANE SEPARATION FILTERS

b. Product Separator
c. Product Fractionator Receiver
d. Feed Surge Drum

29
Q

Which Stripper feed stream flows through the tube side of the Stripper Feed/Stripper Bottoms exchangers?

A

Stripper Feed

30
Q

The purpose of the Fractionation Subsystem is to separate the treated Stripper bottoms stream into FCCU gas oil feed, diesel, ________, and sour off-gas.

A

naphtha

31
Q

What is the purpose of the steam coils located in the upper portion of the convection section of the Product Fractionator Charge Heater?

A

Superheat the High Pressure (550-psig) steam and the Medium Pressure (120-psig) steam

32
Q

Which Product Fractionator Charge Heater process variable is equipped with triplicate instrumentation?

A

Fuel gas pressure

33
Q

The fractionation process occurring in the Product Fractionator is aided by the use of:

A

a. A side-draw reboiler
b. Hydrogen stripping gas
C. 125-PSIG STRIPPING STEAM
d. Vacuum jets on the Fractionator overhead

34
Q

What is the purpose of the cold diesel pumparound stream?

A

Cools down vapor so it can liquify

35
Q

What supplies the heat medium in the Diesel Stripper Reboiler?

A

Hot Separator Bottoms

36
Q

Water that collects in the water boot of the Product Fractionator Receiver is transferred to the ________ ________ ________.

A

Condensate Surge Drum

37
Q

What pressure steam is produced in the Fractionator Bottoms HP Steam Boiler?

A

550 psig

38
Q

Boiler Feed Water used in the Fractionator Bottoms HP Steam Boiler is first ________ in the convection section of Charge Heater (F0001) in the Reaction Subsystem.

A

pre heated

39
Q

The Product Fractionator bottoms stream from the Product Fractionator Bottoms Coolers is released to the ________ ________ ________ ________ ________ ________.

A

FCCU Cold Gas Oil Tank 594

636 HDS Study Questions (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions