One function of the vapor feed heater in a...

One function of the vapor feed heater in a...

Question 1 of 270705eccef9cbacbc34ba4d4587a

One function of the vapor feed heater in a double-effect submerged tube distilling unit is to __________.

Question 1 of 27070

Q

One function of the vapor feed heater in a double-effect submerged tube distilling unit is to __________.

🔍 Key Concepts

• double-effect distilling unit heat flow between first-effect and second-effect • purpose of a vapor feed heater in multi‑effect evaporation systems • relationship between vapor, feedwater, and distillate temperatures for efficiency

💭 Think About

• Think about which stream the vapor feed heater is supposed to warm: is it heating feed going into an effect, or cooling product coming out? • In a double‑effect system, what is usually done with vapor from the first effect so that the second effect can operate efficiently at a lower pressure? • Ask yourself: is the heater’s job to handle all the vapor or distillate from an effect, or only part of a stream to improve heat economy?

✅ Before You Answer

• Identify which choice involves using vapor heat to warm a cooler incoming stream rather than rejecting it. • Check which option would improve overall thermal efficiency by recovering heat, instead of just condensing everything outright. • Eliminate answers that confuse distillate handling with feed heating, since the vapor feed heater’s main duty is about feed/vapor, not final product storage.