What is gas glycol 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. …
What is a glycol filter?
Glycol Sock Filter Glycol Sock Filters remove gritty solids from the glycol flow stream. They are most commonly installed just downstream of the flash separator. Sock filters located on the low-pressure suction side of the pump can also starve the pump if they are plugged.
How does a DEHY work with glycol?
The dehydration process is simple—wet gas contacts dry glycol, and the glycol absorbs water from the gas. Wet gas enters the tower at the bottom. Schlumberger glycol dehydration processes remove water vapor from natural gas, which helps prevent hydrate formation and corrosion and maximizes pipeline efficiency.
How does glycol contactor work?
Glycol Gas Contactor Glycol flows downward through downcomers in the tower, absorbing more water as it passes across each tray. The downcomer seals the glycol passage into the tray below, thus preventing gas from short-circuiting past the bubble caps.
What does the flash tank remove in glycol dehydration?
Many glycol dehydration units contain a flash tank (phase separator), operating at 50–100 psia and 100°F–150°F, that removes dissolved gases/liquid hydrocarbons from the warm rich glycol and reduces VOC emissions from the still.
How do you filter polyethylene glycol?
PEG can be dissolved in warm water at 80-90 °C with no adverse affects. Sterile filtration of the solution is recommended using a 0.45 µm filter, initially. Although autoclaving of PEG in saline solutions has been reported, it is not recommended.
Can you filter propylene glycol?
These filters are designed and tested to be used with propylene glycol, ethylene glycol, triethylene glycol, potassium formate, silicone and hydrocarbon-based heat transfer fluids. These filters can be designed to handle various fluid chemistries, flow rates and pressure requirements.
What is glycol foaming?
Glycol foaming happens when entrained hydrocarbons from production enter the glycol fluid. Foaming also causes poor contact between the gas and the glycol, significantly reducing the drying of the gas.
How does glycol regeneration work?
The rich glycol, after being concentrated in the regeneration device, overflows to the reboiler at the bottom, and enters into the regeneration device after cool down. Concentrated glycol is pumped into the absorption tower through an air or glycol heat exchanger, by the circulating pump.
What causes glycol to foam?
Temperature. Excessive temperatures can lead to a loss of glycol in the glycol reboilers. Temperatures above 400 F cause the vaporization and/or thermal decomposition of glycol. This causes excessive glycol foaming, and high gas velocities through the tower can carry the glycol foam downstream.
How does a glycol contactor work?
Glycol contactor with scrubber section. Consists of a large stack that covers the top of the inlet scrubber Allows the gas to pass upward from the scrubber section to the absorber section Prevents glycol from being lost out of the scrubber section Some contact towers have an internal three phase separator:
What is a scrubber on a gas contactor?
Some contactors have an “internal scrubber” which occupies approximately the lower one-third of the vessel. They are usually installed on units where the inlet gas flow rate is less than 50 MMSCFD. “Chimney” is included on the scrubber/contactor combination ( Figure 2-29 ):
What is the temperature limit for the glycol/glycol pump?
Hot dry glycol from the glycol/glycol heat exchanger enters the preheater at 250°F and the warm dry glycol leaves at 150°F to the glycol pumps en route to the contactor. Temperature limitations to the glycol pump: Glycol powered pumps (Kimray) limited to 200°F. Electric plunger pumps limited to 250°F.
How do you separate glycol and water in a gas still?
The heat exchange generates some reflux for the separation of the water from the glycol in the top of the still and also heats the rich glycol somewhat. In some installations, the rich solution passes to a flash tank operating at about 15 to 50 psig, which allows absorbed hydrocarbon gas to separate from the glycol.