Podcast
Questions and Answers
What are the two sources of heat for D-571?
What are the two sources of heat for D-571?
Integrated heat from E-432, E-476, E-440, and E-450, and 100 psig steam through the tube side of internal reboiler E-571 (or 60 psig letdown steam).
Describe the purpose of D-571, and briefly explain how it achieves this.
Describe the purpose of D-571, and briefly explain how it achieves this.
D-571 stores 15 psig steam and separates it from the condensate. It allows 15 psig steam to exit the top, while untreated boiler feed water exits the bottom.
If the flow of Dowtherm to E-436 were stopped, what effect would this have on the steam being sent to E-435?
If the flow of Dowtherm to E-436 were stopped, what effect would this have on the steam being sent to E-435?
If Dowtherm flow to E-436 were stopped, the steam sent to E-435 would no longer be superheated.
Where does P-571 A/B pump fluid from and to? What type of pump is it?
Where does P-571 A/B pump fluid from and to? What type of pump is it?
Explain the relationship between D-571 and E-571 in terms of steam generation.
Explain the relationship between D-571 and E-571 in terms of steam generation.
Flashcards
D-571 Purpose
D-571 Purpose
A drum to store and separate 15 psig steam from condensate.
E-571 Function
E-571 Function
Heats 15 psig steam inside D-571 using 100 psig steam in its tubes.
E-436 Function
E-436 Function
Superheats 15 psig steam (shell side) using Dowtherm (tube side).
P-571 Function
P-571 Function
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D-571 Steam Sources
D-571 Steam Sources
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Study Notes
- Untreated boiler feed water from Unit 1092 can be directed to D-571, E-432, E-476 (C20-C24 Heat Recovery), and/or E-433.
- 15 psig steam is generated through integrated heat from E-432, E-476, E-440, and E-450 exchangers.
- 15 psig steam from the exchangers goes to D-571, which has an internal reboiler E-571 using 100 psig steam in the tubes.
- The 60 psig steam header can provide letdown to D-571 when needed
- D-571 overhead goes to the shell side of E-436, heated by Dowtherm on the tube side.
- Superheated steam from E-436 flows to E-435.
- D-571 overhead can also be vented to E-567.
- D-571 bottoms flow via P-571A/B (Fractionation LP BFW Circulation Pump) as untreated boiler feed water to E-440 and E-450.
Equipment Details
- Descriptions cover size, shape, internals, and special features
- Equipment discussed includes D-571 (15 psig Steam Drum), E-571 (Steam Generator), E-436 (Stripping Steam Superheater), and P-571 (Fractionation LP BFW Circulation Pump).
D-571 (15 psig Steam Drum)
- D-571 (4’D x 10’L) stores and separates 15 psig steam from condensate.
- 15 psig steam enters the side, untreated boiler feed water exits the bottom, and 15 psig steam exits the top.
E-571 (Steam Generator)
- E-571 is an internal heat exchanger in D-571, heating 15 psig steam with 100 psig steam in the tubes.
E-436 (Stripping Steam Superheater)
- E-436 superheats 15 psig steam on the shell side with Dowtherm on the tube side.
- The purpose of E-436 is to supply superheated 15 psig steam to E-435.
P-571 (Fractionation LP BFW Circulation Pump)
- P-571 is a single-stage centrifugal pump driven by a 7.5 HP, 1750 RPM electric motor.
- It routes untreated boiler feed water from D-571 to E-440 and E-450.
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