Corrosion Control

Technical Briefs

TB 39: Kirin Beer Uses Liqui-Cel for O2 and CO2 Removal from Water in 3 Breweries
Kirin Brewery Reduces corrosion by removing O2 and CO2 from water with Liqui-Cel® degasifiers.

TB 45: Boiler Feed Water Degassing Lowers Operations Costs and Chemical Usage
Boiler Feed Degassing system in China Removes O2 from water for corrosion control and lowers operating costs.

TB 48: Wolsung Nuclear Power Plant Uses Liqui-Cel Membrane Contactors for Dissolved Oxygen Removal to Prevent Corrosion
Wolsung Nuclear Power Plant uses Liqui-Cel® Contactors for O2 and CO2 removal from water without chemicals.

TB 56: Power Plant in Thailand Uses Liqui-Cel® Membrane Contactors to Remove CO2 From Water
Liqui-Cel® degasifiers are used to remove CO2 from water that feeds a high pressure boiler.

TB 57: Rokeby Generating Station Saves 50% in Capital Expense by Using Liqui-Cel® 14x28 Membrane Contactors to Remove CO2 to Extend Mixed Bed Resin Life
14x28 Liqui-Cel® decarbonators are the chemical free choice used to decarbonate water feeding the mixed beds.

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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 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.

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 using Liqui-Cel Membrane Contactors to control the removal of oxygen and carbon dioxide from water.

Forced draft deaerators are also being replaced with compact and clean Liqui-Cel degassing systems. 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 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 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. Contactors have been used for corrosion control in many industries for over 15 years. For more information, please review some of our Technical Briefs and case studies located to the right.

Technical Papers

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.