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Language: English French
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Training Time: 18 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, French
The primary function of a boiler is to transfer heat from hot gases generated by the combustion of fuel into water until it becomes hot or turns to steam. The steam or hot water is then used in a variety of facility processes. Boiler feedwater often contains impurities, which impair boiler operation and efficiency. To improve feedwater quality and steam purity, as well as correct other problems caused by impurities, chemicals can be injected directly into the feedwater or steam. Chemical additives increase boiler efficiency, reduce fuel, operating and maintenance costs, minimize maintenance and downtime, and protect equipment from corrosion and extend equipment life.
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The following key questions are answered in this module:
What is the purpose of chemical additives used in boiler feedwater? To improve feedwater quality and steam purity, as well as correct other problems caused by impurities. They can increase boiler efficiency; reduce fuel, operating, and maintenance costs; minimize maintenance and downtime; and prevent corrosion and extend equipment lifetime.
What types of impurities might need to be removed from boiler feedwater? Alkalinity, silica, iron, dissolved oxygen, calcium, and magnesium.
What are the major types of external treatments? Softening, evaporation, and membrane contractors.
What are the major types of internal treatments? Phosphates, chelates, and polymers.
Why may chemicals be added internally or externally to boiler feedwater? External treatment is used when the amount of one or more of the feedwater impurities is too high to be tolerated by the boiler system. The purpose of internal treatment is to properly react with feedwater hardness, condition sludge, scavenge oxygen, and prevent boiler water foaming.
Below is a transcript of the video sample provided for this module:
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