I would like some guidance on how to use horizontal tanks for acid and alkali oil cleaning

Set the alkali level and water level; insert the oil inlet below the alkali level at the bottom of the tank, while the oil outlet is located at the top of the tank

I’m not quite sure… Will this allow for sufficient reflection?

Agree with what was said on the 2nd floor; whether thorough cleaning can be achieved depends mainly on the residence time inside the tank, and this residence time for alkaline cleaning can be controlled by the length of the horizontal tank

How can it be designed to react fully with acids?

In my opinion, to design an alkali washing tank, it is first necessary to understand the alkali washing medium as well as the operating environment of that medium. Secondly, it is necessary to understand the working principle of the alkali washing tank. Typical alkali cleaning agents are well-mixed solutions of acidic oil and alkaline water (in fact, through acid-base neutralization, they become mixtures of pure oil and saltwater). Among them, pure oil has a relatively low density and tends to move upward while inside the alkali washing tank, whereas saltwater, due to its higher density, tends to sink downward. Once the pure oil and saline water have separated to a certain extent through sedimentation, the upper outlet of the oil tank will deliver the pure oil, while the lower outlet will deliver the oil-free saline water. Thereby completing the alkali washing operation of the alkali washing tank. To ensure thorough alkali washing, it is necessary to maintain a stable flow of liquid within the alkali washing tank, free from disturbances; the flow velocity of the liquid should be as low as possible, and the time the liquid stays in the tank should be as long as possible. Once you understand these fundamental principles, designing an alkali washing tank should not be a problem. The above information is provided for reference only; any inaccuracies are welcome to be discussed.

Could any teacher recommend some general drawings?

The acid and alkali levels as well as the water level in the tank are monitored. The oil inlet is connected to a properly positioned Venturi inlet, while the circulating alkali solution is connected to the intermediate alkali interface of the Venturi device; the combined outlet is then connected to the inlet located in the lower part of the tank at the alkali level. In the tank, the oil floats to the top due to its low density, whereas the alkaline water or acid-alkali salts sink to the bottom because of their higher density. The oil outlet is located at the upper part of the tank. The effectiveness of this system can be ensured by adjusting the concentration of acids and alkalis or by regulating the frequency at which acidic and alkaline residues are removed.

We install a fiber membrane reactor on top of the alkali washing tank to carry out acid and alkali absorption. Then separation is carried out inside the tank. How can this jar be designed better? How to calculate the tank volume based on the volumes of alkali solution and oil?