Reddish discharge water from low-temperature boilers used in sulfuric acid production
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Recently, in the low-temperature sulfuric acid production unit of our company, the boiler water turned red during blowdown, and this condition has persisted. The deaerator temperature is controlled at 100°C, and the demineralized water used is highly purified demineralized water with a conductivity of less than 0.05 us/cm. What other reasons could cause the boiler water to turn red?
Is the pH value of the deionized water too low? It might be caused by acidic corrosion
The deaerator temperature has been raised to 102.5℃
Let’s analyze the pH value of the wastewater and the content of Fe ions in it
Analyzing the oxygen content in deoxygenated water; corrosion is suspected to be caused by high oxygen levels
Low deaerator temperature, inadequate deoxygenation; caused by corrosion of pipeline and boiler feed pump blades