TREA

CONTROLLING DEGRADATION IN A REBOILER VIA HIGHER SURFACE ROUGHNESS

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Information

  • Patent Application
  • 20230294015
  • Publication Number
    20230294015
  • Date Filed
    March 16, 2022
    2 years ago
  • Date Published
    September 21, 2023
    8 months ago
Information
Abstract
An alkanolamine gas treatment unit system that may comprise an absorber column, a regenerator column, and a once-through natural circulation vertical thermosyphon reboiler comprising a reboiler tube and a shell. The reboiler may be a steam driven one having a process side and a shell side, wherein the process side is inside the reboiler tube, the process side of the reboiler and the regenerator column are in fluid communication with one another, an inner surface of the reboiler tube, on the process side, has a surface roughness of 0.06 µm or greater, the shell side of the reboiler is in fluid communication to a steam source, and the regenerator column and the absorber column are in fluid communication with one another. An absorbent regenerator system that may comprise the regenerator column and the once-through natural circulation vertical thermosyphon reboiler.
Description
Claims
  • 1. An alkanolamine gas treatment unit system, comprising: an absorber column;a regenerator column; anda once-through natural circulation vertical thermosyphon reboiler comprising a reboiler tube and a shell, wherein the reboiler is steam driven having a process side and a shell side,wherein the process side is inside the reboiler tube,wherein the process side of the reboiler and the regenerator column are in fluid communication with one another,wherein an inner surface of the reboiler tube, on the process side, has a surface roughness of 0.06 µm or greater,wherein the shell side of the reboiler is in fluid communication to a steam source, andwherein the regenerator column and the absorber column are in fluid communication with one another.
  • 2. The system of claim 1, configured to control a reboiler process side stream pressure of less than 20 psig.
  • 3. The system of claim 1, configured to control a reboiler process side stream temperature of less than 135° C.
  • 4. The system of claim 1, configured to control a maximum reboiler tube process side skin temperature to 135° C. or less.
  • 5. The system of claim 1, wherein a portion of the inner surface of the reboiler tube having the surface roughness extends at least halfway up a height of the reboiler tube.
  • 6. The system of claim 1, wherein a portion of the inner surface of the reboiler tube having the surface roughness extends up an entire height of the reboiler tube.
  • 7. The system of claim 1, where the surface roughness of the inner surface of the reboiler tube comprises an etched surface or a nanoparticle deposit.
  • 8. The system of claim 1, configured to control a thermal degradation rate of an alkanolamine solution, wherein the alkanolamine solution includes alkanolamine and water.
  • 9. The system of claim 5, wherein the alkanolamine is one or more selected from the group consisting of diglycolamine (DGA), morpholine, monoethanolamine (MEA), and diethanolamine (DEA).
  • 10. An absorbent regenerator system, comprising: a regenerator column; anda once-through natural circulation vertical thermosyphon reboiler comprising a reboiler tube and a shell, wherein the reboiler is steam driven having a process side and a shell side,wherein the process side is inside the reboiler tube,wherein the process side of the reboiler and the regenerator column are in fluid communication with one another,wherein an inner surface of the reboiler tube, on the process side, has a surface roughness of 0.06 µm or greater,wherein the shell side of the reboiler is in fluid communication to a steam source, andwherein the regenerator column and the absorber column are in fluid communication with one another.
  • 11. The system of claim 10, configured to control a reboiler process side stream pressure of less than 20 psig.
  • 12. The system of claim 10, configured to control a reboiler process side stream temperature of less than 135° C.
  • 13. The system of claim 10, configured to control a maximum reboiler tube process side skin temperature to 135° C. or less.
  • 14. The system of claim 10, configured to control a thermal degradation rate of an alkanolamine solution, wherein the alkanolamine solution includes alkanolamine and water.
  • 15. The system of claim 14, wherein the alkanolamine is one or more selected from the group consisting of diglycolamine (DGA), morpholine, monoethanolamine (MEA), and diethanolamine (DEA).