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Back To Engineered Modular Solutions

TEG Units

Triethylene glycol (TEG) dehydration systems are commonly used for the removal of water vapor from natural and process gas. Water removal from natural gas is done to prevent hydrate formation and corrosion in downstream pipelines and process equipment. TEG Dehydration meets the typical gas pipeline specification of 4-7 pounds of water per 1 million standard cubic feet gas.

  • TEG dehydration systems have a cheaper capital cost and operating costs compared to Adsorption Dehydration System and Refrigeration Dehydration.
  • Spitzer Industries offers standard TEG Units for reduced lead time and cost.
  • Spitzer Industries also offers customization of our TEG Dehydration units to meet your dehydration needs.
  • Spitzer Industries TEG Units are modularized for quick placement onto your facility for gas treating. This includes a skid mounted absorber column removing the need for a pad for the column.
  • Spitzer Industries has over 20 years of TEG dehydration unit design and fabrication experience.

Standard Packages

Optional Features

Process Description

Standard Packages

Spitzer Standard TEG dehydration units are designed with two separate packages. The Absorber Tower package and the TEG Regeneration package. The absorber tower package and TEG regeneration package can combined in different configurations to meet the client’s product gas specifications and design requirements.

The Absorber column package is based on gas flow rates. The Absorber Tower can be designed using two types of internals: structured packing or bubble cap trays based on your requirements. Absorber Column standard package includes following

  • All absorber columns designed for pressure and temperature of 1440 PSIG and 130 °F respectively
  • Absorber columns with Structured Packing are offered from 16” to 48” O.D.
  • Absorber columns with Bubble Cap Trays are offered 16” to 48” O.D.
  • Inlet Scrubber / Filter Coalescer upstream of absorber column
  • Glycol flash drum
  • Pipe in pipe Gas/Glycol exchanger
  • Pneumatic controls

 

The regeneration package is based on TEG circulation rate and reboiler duty. All Spitzer standard regeneration packages include:

  • Standard sizes from 0.125 MBTU/HR reboiler duty and 0.067 TEG Circulation rate to 1.5 MM BTU/HR reboiler duty and 15 GPM TEG recirculation rate.
  • Direct fired reboilers with BMS
  • Still column with reflux coil and random packing
  • Pipe in pipe exchanger for hot and cold glycol/glycol exchanger
  • Kimray TEG circulation pumps
  • Rich side filtration
  • Pnuematic controls

Optional Features

Spitzer Industries offers custom engineered and fabricated TEG Dehydration Units designed to meet your specifications and needs. Below are several optional features that Spitzer provides:

  • Absorber columns with up to 72” I.D.
  • NACE compliance for sour service
  • Onshore and Offshore specification compliance
  • BTEX removal systems
  • TEMA Rated Exchangers
  • Electric circulation pumps
  • Lean side filtration
  • Electric controls

Process Description

The wet feed gas will enter the absorber package where it will run counter current to the lean TEG in the absorber tower. This counter current flow of feed gas and lean TEG on the tower trays/packing result in the lean TEG absorbing the water from the inlet gas. The feed gas then leaves the absorber tower package as dehydrated gas.

The rich TEG leaving the absorber tower is loaded with water. The rich TEG passes through the amine regeneration section until it reaches the low pressure, high temperature TEG regenerator Still. In the TEG still the water is released as vapor. The hot lean TEG is sent through the remainder of the TEG regenerator package where it is cooled and repressured to be sent into the absorber tower again.

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