Electrodesalination issues
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:At our company, the density of the raw materials processed recently is around 855; the salt content in these raw materials is 30–50 mg/l. The yield of gasoline and diesel is 60%. Desulfurized water is used for water injection in the electrodesalination process, with an injection rate of 5%. The combined pressure difference across the primary and secondary electrodes in electrodesalination is 50 kPa. The amount of demulsifier added is 25–30 ppm. The voltage of the transformer is 13,000 V. The monitoring point for the electrodesalination process is located at the middle of the observation port. The temperature before desalination is between 140–145 degrees Celsius, while the salt content after desalination is between 5–7 mg/l. We would appreciate it if experts could advise us on how to adjust the parameters so as to reduce the salt content after desalination to below 5 mg/l
Why not try desalination with resin? ?
The demulsifier does not provide good desalination effects; you can use a descaling agent alone
The density of the crude oil is around 855; the salt content in the feedstock is 30–50 mg/L. The yield of gasoline and diesel is 60%. This crude oil is likely to be light crude oil. Desulfurized and purified water is used for electrodialysis water injection; the amount of water used in electrodialysis has been increased from 5% to 8%, while the combined pressure difference across the primary and secondary electrodialysis stages has risen from 50 kPa to around 80 kPa. The optimal temperature for electrodialysis is generally between 125–130 degrees Celsius, with the temperature before desalination being between 140–145 degrees Celsius. It is recommended to lower the electrodialysis temperature in order to increase the density difference between crude oil and water. The salt content should be reduced to below 3 mg/l after removal.