What kind of water is suitable for use in electrodesalination water injection?

For electrodesalination water injection, it is preferable to use desalinated water, as it contains relatively few impurities and has a high solubility for salts, which is beneficial for the desalination of crude oil. The water content after desalination is higher than before; therefore, attention should be paid to the selection of demulsifiers as well as the mixing differential pressure. If the demulsifier is not chosen appropriately, it may promote the emulsification of oil and water, resulting in a higher water content after desalination. An excessive mixing differential pressure can also lead to increased emulsification between crude oil and water, thereby reducing the efficiency of desalination and resulting in a high water content after desalination

Purified water from the acidic water stripping unit

Purified water from sulfur will do.

First, it should be clear that the purpose of electrodialytic water injection is to remove salts by taking advantage of their solubility in water. This relates to the amount of water used for injection as well as the quality of that water. Generally, it is required that the amount of water used be around 4% of the treatment volume. The sources of water are relatively diverse; the specific choice depends on the conditions of the factory, taking into account energy savings and cost reduction. The efficiency of electrodialysis is primarily influenced by factors such as the water injection volume, raw material temperature, mixing intensity and processing capacity, the choice of demulsifier, as well as the electric field strength. As for the high water content after electrodialysis, more water enters while less is removed, so the amount naturally increases.

It depends on the actual conditions of the company; either demineralized water or purified water can be used, but it is important to monitor the chloride ion content in it

Isn’t it a bit extravagant to use demineralized water?