New Pumping Solution for Glycol from Viking Pump

New Pumping Solution for Glycol from Viking Pump

04 June 2019 Post by Helen McNulty Industry 0 Comment(s)

New Viking Pump for Glycol - The GL407 Series™ and GL410 Series™

Viking GL Series Pumps are used in Gas Dehydration with less downtime, longer duty cycle, and lower cost.

Viking Pump have created a new pump series for pumping hot glycol in gas pipelines to handle high pressures and high temperatures. 

The Viking Pump GL Series are used in the process of adding Triethylene Glycol to Natural Gas. Triethylene Glycol is used as a liquid desiccant to remove the water from natural gas. The hot glycol is injected into the gas pipeline at high pressures to dehydrate the natural gas coming out of the ground. 

What is Glycol Dehydration? How is water removed from Natural Gas?

When natural gas is produced from an underground reservoir, it is saturated with water vapor and might contain heavy hydrocarbon compounds, as well as non-hydrocarbon impurities. In its raw state, natural gas cannot be marketed and, therefore, must be processed to meet certain specifications for acceptable quality “pipeline” and “sales” gas. These days, triethylene glycol (TEG) dehydration, or simply glycol dehydration, is the most common method. The TEG is re-boiled/re-generated at temperatures exceeding 350° F, high temperatures can be tough on all of the components within the system, it also requires specially engineered pumps to operate in these challenging continuous duty dehydration systems.
There are different ways to dehydrate gas, the most common way being to pump triethylene glycol (TEG) against the natural gas stream. However, with gas coming out of the ground at pressures as high as 10,000 PSI, the pressure has to be reduced (choked) to 1,440 psi max.  Not all positive displacement (PD) pumps are capable of overcoming this pressure as they generate flow, or handling the very “thin” viscosity of TEG for that matter. Also, note that many pumps struggle with the high temperature requirements of glycol dehydration. The glycol is typically 150°F to 200°F at the booster pump, and must be within 20°F of the gas temperature to ensure optimum dehydration levels. But pumping TEG against  the  gas  stream  at  the  wellsite  is  just  the  beginning.  There  are  other  points  of  dehydration in the natural gas stream as it travels through the entire process—from production through delivery (see Figure 1). And pumps are needed at each of those points.

How Viking Pump designed the New GL Series Glycol Pumps

Leveraging a long history of pump design expertise combined with research into this new market, Viking Pump were able to develop a customized, innovative pumping solution to help optimize glycol dehydration operations, able to withstand demanding conditions with less downtime, longer duty cycle, and thus, lower cost. The Viking GL407 Series™ and GL410 Series™ pumps assist at different critical steps of the natural gas glycol dehydration process (indicated by blue gas flames in the diagram below).
Gas Dehydration using Glycol by Thomson Process Equipment and Engineering using Viking Pump for Glycol Pumping in Gas Production Ireland

FEATURES AND BENEFITS of the Viking Pump GL Series Pumps 

Trusted Viking Pump External Gear Design

  • Fewer moving wear components
  • Smooth flow with no pulsation dampening equipment required

Fixed Precision Clearances

  • Enhanced thermal capabilities for easier start-up
  • Higher overall temperature rating improves tolerance for unplanned system changes

All Pumps Wet Tested

  • State of the art testing equipment used to confirm performance prior to shipment

Hardened Internals

  • Increase pressure capabilities, extend service life and minimize wear

Mechanical Seal

  • Less susceptible to leakage and easy in-field replacement

Multiple Drive Configurations

  • Jaw type coupling eliminates the mess and maintenance of an oil bath
  • Motor mounted for easy drop-in replacement

Optional Head Support

  • Pump can be plumbed using hard or flexible pipe

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