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3M™ Liqui-Cel™ Membrane Contactors for Power & Steam Generation

ASK A 3M EXPERT
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Reducing Costs, Maintenance and Downtime Risk with 3M Liqui-Cel Membrane Contactors

  • Controlling dissolved O₂ and CO₂ levels is critical to power plant operation. Both gasses are corrosive and can negatively impact boiler performance and could lead to early piping or component failure. High carbon dioxide levels can increase the total ionic load in water, reducing the effectiveness of ion exchange purification technologies.

    Historically vacuum towers, decarbonators and chemical injection were common methods used to control gases in make-up and feed water to power plants, Heat Recovery & Storage Generators (HRSGs) and other plants with boiler water systems for producing steam. However, these methods can be less efficient, require more maintenance and the handling of large volumes of chemicals.

    Corrosion products can deposit and plug small process devices which may cause process heating control and water quality issues or could be transported back to the boiler in the recovered condensate contributing to boiler water conductivity. Injecting oxygen scavengers after the steam deaerator is also a common practice. Storing the scavengers on site is hazardous. They can be expensive and may contribute to conductivity/TDS in the boiler water. Corrosion products transported to the boiler and using high volumes of chemicals could require higher blow down rates leading to increased make up water use and higher energy losses. Additionally, fouling boiler heat exchange surfaces with corrosion products lowers operating efficiency and puts boiler tubes at risk of failure. Deaerating boiler feed water with 3M™ Liqui-Cel™ Membrane Contactors can help protect capital equipment from corrosion and pitting.

    Oxygen removal down to 1ppb can be achieved with properly designed membrane contactor systems. Compared to a typical vacuum tower or steam deaerator that can achieve 7ppb, 3M products help reduce the amount of oxygen scavenger used during normal operations and alleviate the need for high dosing when the deaerator is not available. Because the achievable oxygen levels are low with Liqui-Cel membrane contactors, the steam deaerator can be used as a feed water preheater and storage instead of venting off the steam. A plant can realize significant cost savings by reducing the deaerator vent rate.

    Lowering dissolved CO₂ levels reduces the total ionic load in water, enhancing the effectiveness of ion exchange purification technologies. This enables a power plant to reduce the frequency of ion exchange resin bed regeneration cycles and increase the service life of deionization equipment, which may save time and cost. Plants using caustic to adjust pH in reverse osmosis (RO) systems may be able to use these gas transfer membrane in lieu of caustic adjustment to help reduce chemical use in the plant.

    Liqui-Cel membrane contactors used for deaeration can reliably achieve very low dissolved gas concentrations and can operate without chemicals compared to alternative degassing methods. In mobile water treatment systems with limited available space Liqui-Cel membrane contactors can be an ideal option.


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Dissolved Gas Control –Featured Products for Power & Steam Generation

  • 3M™ Liqui-Cel™ EXF-14x28 Product Image

    3M™ Liqui-Cel™ EXF-14x28 and 14x40 Series Membrane Contactor for large flow rate applications

  • 3M™ Liqui-Cel™ EXF 8x40 and 8x80 Series Membrane Contactor Products Photo

    3M™ Liqui-Cel™ EXF-8x40 and 8x80 Series Membrane Contactor for height-contrained areas

  • 3M™ Liqui-Cel™ EXF-10x28 Industrial Series Membrane Contactor Product Photo

    3M™ Liqui-Cel™ EXF-10x28 Industrial Series Membrane Contactor for lower cost CO₂ removal system designs


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Resources for Dissolved Gas Control in Power & Steam Generation

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Data Sheets
Product Drawings

6x28 Product Drawings
 

8x20, 8x40 and 8x80 Product Drawings
 

10x28 Product Drawings
 

14x28 Product Drawings
 

14x40 Product Drawings
 

Generic System P&IDs
Operating and Technical Guides
Publications and Case Studies

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Need help with product selection, system sizing or questions about the technology?
3M Separation and Purification Sciences Division
13840 South Lakes Dr.
Charlotte, NC 28273 USA
Phone: + 1 980 859 5400
Fax: + 1 980 859 5258
3M Separation and Purification Sciences Division
13840 South Lakes Dr.
Charlotte, NC 28273 USA
Phone: + 1 980 859 5400
Fax: + 1 980 859 5258

3M Deutschland GmbH
Öhder Straße 28
42289 Wuppertal Germany
Phone: +49 202 6099 - 0
Fax: +49 202 6099 - 750

3M Deutschland GmbH
Öhder Straße 28
42289 Wuppertal Germany
Phone: +49 202 6099 - 0
Fax: +49 202 6099 - 750

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