Why is the water content of the crude oil after electrodesalination higher than before?

Is it because the ionizer isn’t working?

The mixed differential pressure is high, and electrodialysis has not removed the water. Water removal may be due to an inadequate demulsifier or insufficient electrode voltage. Or the crude oil density and viscosity are too high.

1. The demulsifier model is inappropriate; a new demulsifier should be selected. 2. The oil-water interface level in the electrodesalination tank is too high; it should be lowered appropriately. 3. The desalination temperature is too low; it should be increased appropriately. 4. If the water injection volume is too large and the pH value of the water used for injection is high, it is necessary to check both the amount of water injected and the quality of that water. 5. The mixing strength is too high; it should be reduced appropriately. 6. The processing volume of crude oil is too high, and the settling time for the crude oil is insufficient; therefore, the processing volume should be reduced appropriately. 7. The amount of demulsifier injected is low; it should be increased appropriately.

Factors affecting and methods for adjusting the high water content in crude oil after electrodialysis desalination 1. Influencing factors 1.1. Excessive pressure drop across the mixing valve. 1.2. The water injection volume is too high. 1.3. The bottom sediment and water content in the crude oil before separation are too high, resulting in poor oil-water separation. 1.4. The voltage is too low. 1.5. The demulsification dose is too low or the model is inappropriate. 1.6. Improper interface control. 2. Adjustment methods 2.1. Appropriately reduce the pressure drop of the mixing valve. 2.2. Appropriately reduce the water injection volume. 2.3. Sample and analyze the crude oil sediment and water content, and carry out corresponding treatments. 2.4. Check the electrical system (instrumentation system). 2.5. Increase or change the demulsifier type. 2.6. Adjust the set value of the interface controller as necessary.

The dehydration level is high – is it above the limit? ? ? ? ? ?

I’d like to add one more point: with a large processing volume, the residence time of the raw materials is short

Agree with the 4th point; to add, an excessively high temperature when entering the tank, above 130 degrees, can also cause problems

Because electrodialysis requires the injection of water–only by injecting water can the inorganic salts contained in crude oil be removed. The amount of water injected is usually 5-10 tons per hour, and as a result, the crude oil after treatment contains water, and the level of water content is higher than before treatment~

1. The dosage and type of demulsifier. 2. The amount of water injected, the injection location, and the pH of the water used do not meet the specified requirements (which affects the demulsifier). 3. Influence of electrodeionization temperature. 4. The boundary value for electrodialysis is too high. 5. The magnitude of the mixed strength. 6. Residence time: 2 min (in a strong electric field). 7. Influence of electric field strength 90. 3、