How Desalination Works In Oil And Gas Industry

Desalination is the process of purifying saline water by removing salt and other impurities from the crude oil to obtain oil and petroleum products. For years, various types of desalination technologies have been used in oil and gas companies. From oil and gas to Texas construction of desalination plants, the trend continues to serve the industry for various purposes. The desalination process usually includes dilution water injection and dispersion, emulsification of diluted water, distribution of the emulsion in the electrostatic field, and electrostatic coalescence.

Desalting 

Crude oil recovered from the earth’s crust is mixed with gases, water, chloride salts, and dirt, which contain other minerals. The oil is then transferred to the processing plant using a pipeline. The process of desalting consists of mixing heated crude oil with washing water. In a separate vessel, the process of emulsification is conducted to prevent emulsions during the process. 

Emulsification

Now, an electric field across the settling vessel is applied to mix the polar salty water. This procedure reduces water and salt contained in the oil. An emulsifying device is used for diluting the water that was injected upstream in the oil. This allows us to separate into two phases by electrostatic coalescence.

Electrostatic coalescence 

After emulsification, electrodialysis is conducted. This is a membrane-based process that involves filtering the salt out of water that comes with the crude oil. A polarization effect is used for inducing electrostatic coalescence. In this process, water droplets are pulled from the oil-water emulsion phase. Meanwhile, the salt that was dissolved in the water also separated due to polarization.

The Texas construction of desalination plant service can build two stages of desalting units. They are applied with two electrostatic Coalescers, also known as desalter.

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