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The boiler house or steam generation facility is frequently referred to as the heart of an industrial power plant. As they often operate 24 hours a day, treatment of boiler feedwater has become the key to successful operation of industrial power plants.
The importance of treating water prior to the boiler process cannot be underestimated. Removal of organics, suspended particles, dissolved minerals, and dissolved gases is critical to avoid scaling and fouling, damaging, and reducing the longevity of the expensive boiler/turbine process.
Boiler feedwater quality recommendations are stated by two groups ABMA - American Boiler Manufacturers Association and the more comprehensive ASME – American Society of Mechanical Engineers International Boiler and Pressure Vessel Code that provides guidance and rules of safety for design, fabrication, and inspection of boilers and pressure vessels, and nuclear power plant components.
In general the higher the operating drum pressure the better quality boiler feedwater that must be provided to the steam generation equipment.
A number of treatment options may be considered, but the most common design consists of pretreatment filtration and chemical addition for removal of particulate matter and conditioning of the water chemistry followed by a membrane process for the bulk reduction of dissolved minerals and a final polishing ion exchange step.
There is a clear tradeoff between investment in water treatment equipment and water treatment chemicals. Often, investing in equipment that produces a higher quality boiler feedwater will significantly reduce your chemical usage and increase your cycles of concentration, improving overall plant efficiency.
Evoqua Water Technologies evaluates your specific feedwater quality, final water quality, and space requirements and applies our vast process knowledge to design a cost effective, service-friendly system that operates in an efficient manner. Offering you the best long term solution is our goal.