The primary objective of the electrostatic grid in electrostatic heater-treater used in crude oil processing is to:
Show Hint
- separate sand particles.
- promote coalescence of water droplets.
- generate electrical energy from the kinetic energy of the feed.
- prevent corrosion by the cathodic protection.
The Correct Option is B
Solution and Explanation
Step 1: Role of heater-treater.
In crude oil processing, a heater-treater is used to separate water and oil. The electrostatic grid provides an electric field inside the vessel. Step 2: Mechanism.
The electric field induces charges in water droplets suspended in the crude oil. Oppositely charged droplets attract each other, causing them to coalesce (merge). Larger droplets settle faster, enhancing water–oil separation. Step 3: Evaluate options. \begin{itemize} \item (A) Sand separation is done by desanders, not electrostatics. \item (B) Correct: The grid promotes water droplet coalescence. \item (C) No energy generation occurs here. \item (D) Cathodic protection is unrelated to heater-treaters. \end{itemize} Final Answer: \[ \boxed{\text{promote coalescence of water droplets}} \]
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