Additional Equipment for Heat Transfer in Boilers

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Questions and Answers

What is the principal energy transfer medium that the industry depends on for its process applications?

  • Thermal fluids
  • Ammonia
  • Steam (correct)
  • Natural gas

Which component plays a crucial role in separating saleable end products in thermal processes?

  • Water
  • Steam
  • Electricity
  • Thermal fluids (correct)

What is the purpose of ammonia compression refrigeration cycle as mentioned in the text?

  • To generate electricity
  • To provide energy for process heating
  • To separate components
  • To cool substances (correct)

What type of basic feedstocks are mentioned in the text?

<p>Fluids ranging from natural gas to heavy crudes (A)</p> Signup and view all the answers

In hydrocarbon processing, what unique skill set is required to effectively manage thermal operations according to the text?

<p>Power Engineer (D)</p> Signup and view all the answers

What are the common thermal processing stages used in various industries as per the text?

<p>'Generation', 'Distribution', 'End-use', and 'Recovery' of thermal fluids (C)</p> Signup and view all the answers

Why is an economizer considered an integral element of the generation section in a boiler?

<p>To recycle some remaining thermal energy in the combustion gases (C)</p> Signup and view all the answers

How do combustion air preheaters differ from economizers in their function?

<p>They transfer excess heat to incoming combustion air (A)</p> Signup and view all the answers

What is the primary function of ancillary equipment and controls in a generating system?

<p>To ensure feedwater quality, generating efficiency, and process safety (D)</p> Signup and view all the answers

In steam systems, which form of energy transfer is most prevalent?

<p>Heat for process heating (C)</p> Signup and view all the answers

How do distribution systems regulate the delivery of thermal energy?

<p>By responding to changing pressure and temperature requirements (C)</p> Signup and view all the answers

Which factor primarily influences the choice between a steam system and a heat transfer fluid (HTF) system?

<p>Thermal requirements of the process (C)</p> Signup and view all the answers

What is the purpose of steam separators in a system that generates wet steam?

<p>To remove water droplets from the steam (C)</p> Signup and view all the answers

What is the primary role of gas turbines in energy conversion industries?

<p>Mechanical energy conversion (D)</p> Signup and view all the answers

Which phase of operation do heat transfer fluids (HTF) systems primarily operate in?

<p>Liquid phase (C)</p> Signup and view all the answers

How do steam traps contribute to the efficiency of steam distribution systems?

<p>By trapping condensate in the condensate return system (A)</p> Signup and view all the answers

What is the main advantage of steam in energy transfer compared to heat transfer fluids?

<p>High heat capacity (C)</p> Signup and view all the answers

What is the function of steam accumulators in a distribution system?

<p>To discharge excess energy into a pressure vessel (C)</p> Signup and view all the answers

Why are back-pressure turbines sometimes used in distribution systems?

<p>To extract energy from high-pressure steam (C)</p> Signup and view all the answers

What is the major driver for choosing between a steam system and a heat transfer fluid system?

<p>Process temperature requirements (B)</p> Signup and view all the answers

What role do isolation valves play in distribution systems?

<p>To control the flow of thermal transfer medium (B)</p> Signup and view all the answers

Which equipment would be involved in the 'Generation' segment of an industrial plant using steam?

<p>Heat recovery steam generator (HRSG) (B)</p> Signup and view all the answers

How does appropriate insulation affect plant safety in thermal distribution systems?

<p>By reducing surface temperatures and risk of burns (A)</p> Signup and view all the answers

'Distribution of thermal energy' within a plant primarily involves transferring heat from:

<p>'Steam' to 'end use' processes (B)</p> Signup and view all the answers

'End use processes' within an industrial plant relate to the utilization of thermal energy for:

<p>'Process heating' (C)</p> Signup and view all the answers

What plays a significant role in determining the equipment configurations within the generation section of a plant using steam?

<p>Choice of heat transfer mediums (B)</p> Signup and view all the answers

What is the main purpose of the molecular size reduction process?

<p>To convert surplus unsaleable products into smaller ones in demand (C)</p> Signup and view all the answers

How does heat play a role in chemical structure adjustment for gasoline manufacture?

<p>Heat promotes the electrochemical processes to convert metallic ores into solid metals (D)</p> Signup and view all the answers

What happens to condensate in an efficient steam system once the end-use process extracts the required energy?

<p>It is re-used as feedwater in the boiler (D)</p> Signup and view all the answers

What is the primary focus of the return and recycling of post-combustion gases?

<p>To extract energy to preheat fuel and air streams (B)</p> Signup and view all the answers

What happens during isomerization in gasoline manufacture?

<p>Straight chain alkanes are converted into branched chain alkanes (B)</p> Signup and view all the answers

What is the role of direct-fired heaters in energy transfer compared to steam or thermal fluid?

<p>Direct-fired heaters have simpler recovery and reuse processes (C)</p> Signup and view all the answers

What is the purpose of a deaerator in the boiler system?

<p>'To strip oxygen and non-condensable gases from the condensate' (A)</p> Signup and view all the answers

What is the main purpose of physical processes as described in the text?

<p>To separate components based on physical changes (B)</p> Signup and view all the answers

In which scenario would crystallization be most commonly used?

<p>To remove crystalline substances from non-crystalline ones (B)</p> Signup and view all the answers

What role does dilution play in industrial processes?

<p>Reducing solids buildup on heat exchangers by using steam (D)</p> Signup and view all the answers

How does pressure regulation using steam impact industrial reactions?

<p>Controls the pressure by injecting steam into a fixed volume vessel (A)</p> Signup and view all the answers

What is the key characteristic of solvent extraction as described in the text?

<p>Separates substances based on differences in solubility (A)</p> Signup and view all the answers

Which industrial process typically involves stripping towers?

<p>Removing unwanted contaminants from process fluids using steam (D)</p> Signup and view all the answers

What distinguishes chemical conversion processes from physical processes?

<p>Chemical conversion turns one compound into another through reactions (C)</p> Signup and view all the answers

What is the primary function of quenching in industrial processes?

<p>To cool and stop high-temperature reaction processes using steam (A)</p> Signup and view all the answers

Under what circumstances would distillation or fractionation be employed in an industrial setting?

<p>To separate compounds based on differences in boiling points in a tower (A)</p> Signup and view all the answers

What distinguishes thermo-mechanical processes from chemical conversion processes?

<p>Thermo-mechanical processes involve direct conversion of thermal energy into mechanical action (C)</p> Signup and view all the answers

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