Does steam deaeration involve Henry's Law?

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SUMMARY

Steam deaeration in boiler feed-water systems utilizes the principle of Henry's Law to effectively remove dissolved gases from water. By sparging steam through the water, the system heats the feed water to its saturation temperature, which corresponds to the pressure within the deaerator. This process results in a significant reduction in gas solubility, leading to the release of unwanted gases. Understanding this mechanism is crucial for optimizing boiler efficiency and water quality.

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rollingstein
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On many boiler feed-water systems there are deaerators which essentially sparge steam through the water.

Why does steam deaerate water? Is this simply a temperature effect on gas solubility? Or something else?
 
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The steam is used to heat the feed water to its saturation temperature for the pressure inside the deaerator.

This is a practical application of Henry's Law, which states that when the partial pressure of a liquid equals the total pressure above the liquid (i.e., when the liquid reaches its boiling temperature), the solubility of any gases dissolved in the liquid drops to zero, and these gases are released.
 
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