Gas, stored in underground caverns for example, absorbs moisture from the surrounding salt dome and thus requires treatment.
Glycol is mainly used to reduce the moisture content in gas. Various types of glycol (MEG, TEG, DEG) are used for this purpose, allowing for the compression and further transport of the gas.
LEWA offers custom-designed process diaphragm pumps and packages optimized for glycol injection.
Advantages of LEWA diaphragm pumps for glycol injection:
Process description
Gas dehydration using glycol
The glycol is separated from the gas and containes moisture with it. The absorbed moisture also contains contaminants, such as H2S, sulfur and solids, that make the water acidic and extremely corrosive.
The low pH value is neutralized by the injection of caustic soda. Afterwards the glycol is heated to about 120° C, vaporizing the water content. The glycol is then ready for recycling and can be injected back into the incoming gas.
In addition to the glycol injection, every large drying system always requires one or more chemical injection systems for neutralization.
There are various processes – from simple injection to so-called high speed columns (GESIP® process) – which ensure fast drying and allow a high gas flow.
LEWA has been your expert in pumps and packages since the 1950s. With us, you get everything from a single source: Our custom-built packages are used all around the world for offshore crude oil and natural gas production. From China to the United Arab Emirates, strong partners rely on our expertise for crude oil exploration applications.
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Ready-to-operate, custom-designed pump units with a small-footprint design. We choose all the pumps, materials, and accessories for these pump skids.
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