What is the purpose of a boiler economizer?

Prepare for the Engineman EN A School Test 1. Utilize flashcards and multiple choice questions with detailed explanations to boost confidence and readiness for the test.

Multiple Choice

What is the purpose of a boiler economizer?

An economizer uses hot exhaust gases to preheat the incoming feedwater before it enters the boiler. By capturing heat from the flue gases, it raises the water temperature ahead of the boiler, so the boiler has to supply less energy to turn that water into steam. This reduces fuel use and stack losses, boosting overall boiler efficiency. It isn’t a device for filtering feedwater, it doesn’t inject steam to raise boiler pressure, and it isn’t a storage for excess fuel. The key idea is heat recovery from the flue gas to preheat feedwater, improving efficiency.

An economizer uses hot exhaust gases to preheat the incoming feedwater before it enters the boiler. By capturing heat from the flue gases, it raises the water temperature ahead of the boiler, so the boiler has to supply less energy to turn that water into steam. This reduces fuel use and stack losses, boosting overall boiler efficiency. It isn’t a device for filtering feedwater, it doesn’t inject steam to raise boiler pressure, and it isn’t a storage for excess fuel. The key idea is heat recovery from the flue gas to preheat feedwater, improving efficiency.

More practice questions