Hydrogen Desulfurization Overview
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Questions and Answers

What is the main purpose of the #3 HDS Absorber?

  • To compress hydrogen gas from the reaction and separation system
  • To remove hydrogen sulfide from the hydrogen stream (correct)
  • To mix hydrogen with hydrogen sulfide
  • To separate ammonia from the sour hydrogen gas

    • What happens to the hydrogen sulfide absorbed by the lean amine?

  • It forms rich amine and exits the absorber from the bottom. (correct)
  • It is used as a fuel in the Hydrocracker Unit.
  • It is compressed and returned to the reaction and separation system.
  • It is released back into the gas stream as sweetened hydrogen.

    • What is the role of Methyldiethanolamine (MDEA) in the absorption process?

  • To react with ammonia in the sour hydrogen gas
  • To compress the sweetened hydrogen
  • To separate the hydrogen sulfide from the rich amine
  • To act as a solvent to absorb hydrogen sulfide (correct)

    • What is the name of the process where lean amine becomes rich amine?

    <p>Absorption (B)</p> Signup and view all the answers

    Where does the sour hydrogen gas enter the #3 HDS Absorber?

    <p>From the bottom of the #3 HDS Absorber (A)</p> Signup and view all the answers

    What is the role of the Absorber Lean Solvent Pump West/East (13P-109/110) in the absorption process?

    <p>To pump lean amine to the top of the absorber (C)</p> Signup and view all the answers

    What is the main objective of the Lean Amine Subsystem?

    <p>To prepare the lean amine for use as a solvent in the #3 HDS Absorber. (A)</p> Signup and view all the answers

    What happens to the sweetened hydrogen after it exits the #3 HDS Absorber?

    <p>It is used to provide hydrogen-rich feed to the Distillate HDS Reactor (D)</p> Signup and view all the answers

    What controls the flow of the lean amine exiting 13PV-2321A/B/C?

    <p>Flow control (C)</p> Signup and view all the answers

    What is the primary purpose of the Particulate Filter (13PV-2321A/B/C) in the Lean Amine Subsystem?

    <p>To remove any suspended solid particles from the lean amine. (B)</p> Signup and view all the answers

    What is the role of the Coalescer (13PV-2320) in the Lean Amine Subsystem?

    <p>To remove dissolved contaminants that cause foaming of the amine solution. (D)</p> Signup and view all the answers

    What is the purpose of the Particulate Filter After Carbon Bed (13PV-2322A/B) in the Lean Amine Subsystem?

    <p>To further remove debris from the lean amine after it passes through the Coalescer. (B)</p> Signup and view all the answers

    What is the source of the lean methyldiethanolamine (MDEA) entering the Lean Amine Subsystem?

    <p>The Reformer or Coker Lean Amine Header. (B)</p> Signup and view all the answers

    What is the purpose of the Condensate Pumps East/West (13P-107/108) in the Lean Amine Subsystem?

    <p>To pump condensate from the Condensate Pot to the inlet of the Particulate Filter After Carbon Bed. (D)</p> Signup and view all the answers

    Which of the following is NOT a function of the Lean Amine Subsystem?

    <p>Regenerating the amine solution. (B)</p> Signup and view all the answers

    What material is used in the Coalescer (13PV-2320) to remove dissolved contaminants?

    <p>Coal. (D)</p> Signup and view all the answers

    What is the primary purpose of the Amine Decanter (13PV-2307)?

    <p>To separate any vapor from the rich amine (C)</p> Signup and view all the answers

    Where does sour gas exit after processing in the Amine Decanter?

    <p>To the Flare Header (C)</p> Signup and view all the answers

    Which system receives the rich amine liquid after it is pumped from the Decanter?

    <p>Amine Regeneration Unit (ARU) (A)</p> Signup and view all the answers

    What kind of vessel is the Amine Decanter classified as?

    <p>Vertical separation vessel (C)</p> Signup and view all the answers

    What is contained within the #3 HDS Absorber to manage sour water?

    <p>Water boot (A)</p> Signup and view all the answers

    Which two Amine Regeneration Units (ARUs) can the rich amine be routed to?

    <p>#1/2 and #3/4 ARU (B)</p> Signup and view all the answers

    Which components combine their drains with the sour water from the #3 HDS Absorber?

    <p>Decanter and Particulate Filters (D)</p> Signup and view all the answers

    What action can be taken with a portion of the rich amine in addition to being sent to the ARUs?

    <p>Sent to the Decanter (C)</p> Signup and view all the answers

    Flashcards

    Lean Amine

    A solvent free of acid gas, used in absorption to remove H2S.

    #3 HDS Absorber

    An absorption column that removes H2S from a hydrogen stream using amine technology.

    MDEA

    Methyldiethanolamine, the lean amine used for H2S absorption.

    Absorption Subsystem

    System that processes sour hydrogen gas to remove toxic components.

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    Rich Amine

    Amine that has absorbed H2S from the gas stream, resulting in a solution high in toxicity.

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    Sweetened Hydrogen

    Hydrogen gas that has been cleaned of H2S, used for further processing.

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    Effluent Cold Separator

    A unit that prepares sour gas for entry into the absorber from the separation system.

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    Recycle Hydrogen

    Purified hydrogen that is reused in the system, enhancing process efficiency.

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    Hydrogen Desulfurization (HDS) Unit

    A unit that produces distillate product by desulfurizing hydrogen.

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    Absorption System

    System that removes hydrogen sulfide from sour hydrogen gas using amine technology.

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    Lean MDEA

    Methyldiethanolamine solvent used to absorb hydrogen sulfide from gas streams.

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    Amine Regeneration Unit (ARU)

    Facility where rich amine is regenerated for reuse in absorption.

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    Coalescer

    Device that removes dissolved contaminants from the lean amine to prevent foaming.

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    Particulate Filter

    Filters that remove solid particles from lean amine to protect equipment.

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    Foaming Prevention

    Process to avoid excess bubbling in amine solutions caused by impurities.

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    Amine Decanter

    A vertical separation vessel for rich amine to remove vapor.

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    Sour Water

    Water containing dissolved hydrogen sulfide and ammonia.

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    Rich Amine Header

    Collects and routes rich amine for regeneration.

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    Decanter Pump (13P-111)

    Pumps rich amine liquid to the Rich Amine Header.

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    Sour Gas

    Gas containing hydrogen sulfide, released from the decanter.

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    Internal Water Boot

    Collects sour water from feed streams in HDS Absorber.

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    Combined Drain Stream

    Mixture of drains from various components sent to decanter.

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    Study Notes

    Absorption System Overview

    • The #3 Hydrogen Desulfurization (HDS) Unit produces distillate using a blend of light distillate, medium distillate, light cycle oil, light coker gas oil, and mixed gas oils.
    • Sour hydrogen gas from the #3 HDS Reaction and Separation System enters the Absorption System.
    • Amine absorption technology removes toxic hydrogen sulfide impurities from the sour gas.
    • This produces sweetened hydrogen, which is compressed and returned to the Reaction and Separation System for catalytic hydrotreating.
    • Lean methyldiethanolamine (MDEA) absorbs hydrogen sulfide from the gas stream, creating "rich amine."
    • Sweetened hydrogen is fed to the #3 HDS Compression System.
    • Rich amine is sent to the Amine Regeneration Unit (ARU) for regeneration and reuse.

    Lean Amine Subsystem

    • The Lean Amine Subsystem prepares lean amine for use in the #3 HDS Absorber.
    • It filters debris from the lean amine stream to prevent foaming.
    • Lean methyldiethanolamine (MDEA) enters the subsystem from the Reformer or Coker Lean Amine Header.
    • Particulate filters (13PV-2321A/B/C) remove solid particles.
    • The coaliscer (13PV-2320) removes dissolved contaminants to prevent foaming.
    • Additional filtering occurs in 13PV-2322A/B to further remove debris.
    • Filtered lean amine is then pumped by 13P-109/110 to the #3 HDS Absorber.

    Sour Gas Absorption

    • Sour gas containing hydrogen, H2S, and ammonia enters the #3 HDS Absorber.
    • The absorber (15 trays) uses amine absorption to remove H2S.
    • Lean MDEA absorbs H2S, becoming "rich amine."
    • Sweetened hydrogen exits the top of the absorber to the Recycle Hydrogen KO Drum.
    • Rich amine containing H2S exits the bottom of the absorber and is sent to the Amine Regeneration Unit (ARU).
    • Sour water in the feed streams collects in an internal water boot.
    • Sour water is drained and combined with other drains for separation.
    • Sour gas exits the decanter to the Flare Header.
    • Rich amine is pumped to the ARU for regeneration.

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    Related Documents

    Sinclair 3HDS Absorption System PDF

    Description

    Explore the key components of the Hydrogen Desulfurization (HDS) unit, focusing on the absorption system and lean amine subsystem. This quiz covers the processes of hydrogen sulfide removal and sweetened hydrogen production essential for catalysis. Test your knowledge on the technology and operations involved in refining processes.

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