Question 121Steam Plants - Assistant Engineer

The correct answer is D) drain the soot blower headers. Draining the soot blower headers helps avoid acid corrosion of the economizer tubes when blowing tubes. This is because the soot blower headers can accumulate acidic condensation, which can then be blown through the economizer tubes during the blowing process. Draining the headers removes this acidic buildup and prevents it from being forced through the economizer, reducing the risk of corrosion. The other options, such as lowering the water level (A), raising boiler pressure (B), or lowering boiler pressure (C), do not directly address the issue of acid corrosion in the economizer tubes during the tube blowing process.