The amount of chloride content in the water...

🔍 Key Concepts

• Boiler water treatment aims to control scale, corrosion, and carryover by adjusting water chemistry. • Chloride in boiler water is a dissolved salt that is not destroyed by chemicals; it must be removed or diluted. • Blowdown is the intentional removal of boiler water to control the concentration of dissolved solids.

💭 Think About

• Think about whether chloride is something you can neutralize with a chemical, or if you need to physically remove water that contains it. • Which of the listed chemicals are typically used to control dissolved oxygen or pH rather than salt content? • What routine operator action is used to control total dissolved solids (TDS) in a boiler, including chlorides?

✅ Before You Answer

• Identify which option describes a mechanical/operational process rather than adding another chemical. • Recall what hydrazine is commonly used for in boilers (hint: dissolved oxygen control). • Consider whether any additive can actually remove chloride ions from the water, or if they just change other aspects of water chemistry.

The amount of chloride content in the water of an auxiliary boiler can be reduced by __________.

adding hydrazine

blowing down the boiler

adding phenolphthalein

adding a sulfite chloride scavenger