Questions

✔ Removes too many light components, leading to flash point issues in kerosene & diesel.✔ Causes overloading of upper column trays, affecting separation efficiency.✔ ...

Problem Causes Solutions High salt content in crude after desalter Low wash water injection, poor mixing Increase wash water, ...

✔ Possible Causes: Blocked overhead condenser → Poor vapor condensation. Overloaded reflux drum → Excess vapor flow.

✔ Pump-around circuits remove heat from specific sections of the column.✔ Help reduce furnace fuel consumption by using heat recovery.✔ Control temperature

✔ Reflux is a liquid stream returned to the column to improve separation.✔ Helps achieve sharper separation between different fractions.✔ Increases efficiency by maintaining ...

The CDU consists of several key sections, each playing a vital role in the crude oil separation process: 1. Preheat Train ✔ Crude oil is preheated using heat ...

The Desalter is a crucial part of the CDU that removes impurities from crude oil before it enters the furnace. ✔ Key functions of the Desalter:

The Crude Distillation Unit (CDU) is the first processing unit in a refinery where crude oil is separated into different fractions based on boiling points. Below are key interview questions with detailed answers. ✅ General Process Questions 1️⃣ What is the ...

🔹 Problem: Operators observe poor desulfurization performance and an increase in coke formation inside the reactor. 🔹 Possible Causes: ✔ Hydrogen ...

Below are the answers to each question one by one. ✅ General Process Questions 1️⃣ What is the purpose of the Naphtha Hydrotreater (NHT) unit? 🔹 The Naphtha Hydrotreater (NHT) Unit removes sulfur, nitrogen, oxygen, and metal impurities from naphtha using hydrogen ...