Plant Operation Practice Test

What must be removed from the boiler to prevent sulfuric acid from forming?

1. Cold air

2. Hot steam

3. Cool soot and ash

4. Excess fuel

The correct answer is: Cool soot and ash

Removing cool soot and ash from the boiler is essential in preventing sulfuric acid formation. This is primarily because when sulfur compounds, which may be present in the fuel, interact with moisture and the soot and ash, they can lead to the formation of sulfuric acid within the boiler system. Sulfuric acid can cause significant corrosion and damage to the boiler and piping systems, leading to operational inefficiencies and costly repairs. Regular maintenance that includes the removal of soot and ash helps to reduce the amount of unburned fuel and residual sulfur that can contribute to the acid formation. Keeping the boiler clean and minimizing these deposits not only improves efficiency but also ensures longevity and safety in plant operations.