Removing dissolved gases without the use of chemicals
It is commonly known that dissolved gases such as CO2 and O2 can oxidize and destroy metal piping and system components. Corrosion control and prevention is essential to avoid the large cost associated with replacing boiler tubes, old pipes and corroded equipment. The life time of metal components can be extended and plant downtime can be minimized by adding a small compact membrane degassing system that controls dissolved gasses and prevents corrosion.
Historically, oxygen scavengers might have been used to remove oxygen from water to prevent corrosion but current environmental concerns with handling and storing chemicals is limiting chemical use. Instead, many industries are opting to control corrosion using Liqui-Cel® Membrane Contactors for oxygen and carbon dioxide removal from water.
Forced draft deaerators are also being replaced with compact and clean Liqui-Cel® Membrane Contactors. Forced draft systems can only remove CO2 to about 5 ppm. Membrane Contactors can provide removal of CO2 down to 1 ppm. Membrane Contactors are also clean and because degassing contactors provide a closed system they do not introduce additional contaminants into the system. The contaminants that are introduced from the environment through the FDA’s blower can negatively impact the boiler and other processes. No additional contaminants are introduced from Liqui-Cel® Membrane Contactors.
Excess nitrogen in the water used to feed nuclear reactors can also form carbon 14, which is a long term environmental contaminant. Formation of Carbon 14 can be prevented by using Liqui-Cel® Membrane Contactors to remove nitrogen from these feed water systems. Because our membranes are not selective to which gas is removed, all dissolved gases can be removed simultaneously.
Membrane Contactors are small clean reliable systems that can be placed virtually anywhere in a building. They have been used for corrosion control in many industries for over 20 years. For more information, please review some of our Technical Briefs and case studies located to the right.
Membrane Contactors: An Introduction To The Technology
This paper provides a good overview to Membrane Contactor technology. Principles of Membrane Contactor Operation and mass transfer principles are discussed.