A boiler economizer should be bypassed...

A boiler economizer should be bypassed...

Question 1 of 270705eccefa0bacbc34ba4d46edb

A boiler economizer should be bypassed whenever the _______.

Question 1 of 27070

Q

A boiler economizer should be bypassed whenever the _______.

🔍 Key Concepts

• Boiler economizer purpose – what does it do with exhaust (stack) gas heat? • Dew point / condensation – what happens inside economizer tubes if flue gas is cooled below its dew point? • Effect of economizer on feedwater temperature and other components (superheater, DC heater, turbine load)

💭 Think About

• Which operating condition could cause corrosion or damage inside the economizer if it stayed in service? • Do changes in superheater outlet temperature, DC heater outlet temperature, or turbine power directly require taking the economizer out of service, or are they usually controlled another way? • In which case would continuing to cool the stack gas become unsafe for the economizer materials?

✅ Before You Answer

• Verify what happens when stack gas temperature approaches the acid dew point in an oil‑fired boiler. • Check whether superheater or DC heater temperature problems are normally corrected by adjusting firing rate/controls instead of bypassing the economizer. • Confirm that turbine load (full, half, or low power) by itself is not the key safety trigger for bypassing the economizer.