What is a TEG contactor?

The purpose of a glycol contactor is to remove water from a natural gas stream. When natural gas is produced, it typically contains a large amount of water that can be saturated or is at the water dew point. Triethylene glycol (TEG) is the typical choice in an absorption vessel to remove water. …

How does a TEG unit work?

A triethylene glycol (TEG) gas dehydration system is a setup used to eliminate water vapor from newly recovered natural gas. This drying equipment utilizes liquid triethylene glycol as its dehydrating agent to pull out water from a stream of natural gas flowing over it.

How does TEG dehydration work?

For dehydration of natural gas by triethylene glycol (TEG) process to a lower water content/water dew point temperature a higher lean TEG concentration is required. Stripping gas lowers the water partial pressure causing more water to vaporize from TEG solution.

How does TEG absorb water?

What is a TEG Gas Dehydration Unit? To take the water out of natural gas, producers use a liquid called triethylene glycol, also known as TEG. When gas comes into contact with triethylene glycol, the water vapors entrained in the gas are absorbed in the TEG. In effect, the glycol “soaks up” the water.

What is Meg offshore?

Monoethylene glycol (MEG) is widely used by the oil and gas markets in wellheads and pipelines to prevent hydrate formation at pipeline conditions. In offshore deepwater gas production facilities, where the exposure to lower temperatures in subsea pipelines is common, MEG is used for hydrate inhibition.

What is Meg injection?

The MEG Injection together with a Dew Point Plant is able to dehydrate the natural gas, because the chiller unit operates at low temperatures and it permits the water content of the gas to be condensed and removed in “cold separation”, but this process requires inhibitor injection in order to avoid hydration formation.

What is Meg deg?

Monoethylene Glycol (MEG) is a colourless, odourless, non-volatile liquid. Diethylene Glycol (DEG) is a stable, high-boiling, odourless and hygroscopic liquid, which is completely miscible in water. Triethylene Glycol (TEG) is a colourless, odourless and stable liquid with low viscosity and a high boiling point.

What are the limitations of Teg to gas contactor?

TEG to gas contactor is limited to 10°F to 15°F above the inlet gas temperature. If hotter, some TEG will vaporize with gas. If colder, gas condensation of the hydrocarbons may cause foam and glycol loss. Overall heat transfer coefficient (U = 45).

How does a glycol contactor work?

The inside of the contactor contains either packing of several trays with weirs that maintain a specific level of glycol so that the gas must bubble through the glycol as the gas flows up (Figure 7.16 ). As the wet gas passes upward through each succeeding tray, it releases the water vapor to the glycol and becomes progressively drier.

How does natural gas work in a gas scrubber?

Natural gas only travels through the inlet scrubber and the contactor tower. On some sites, these two vessels are combined into one unit. All the other equipment is used to regenerate the glycol. As the glycol moves through the contactor tower, it absorbs the moisture from the natural gas.

How does a wet gas contactor work?

The scrubbed wet gas enters the contactor tower where it comes in contact with the down-flowing glycol. Trays or structured packing inside the contactor provide adequate contact area for the gylcol to absorb water from the natural gas.