ETC membrane is used to remove dissolved carbon dioxide in water. Product water carbon $dioxide content can be decreased to 0.5ppm.
membrane contactor is a kind of special hydrophobic hollow fiber array made of polymer material.≈ Then the array is spiral-wounded onto a water distribution tube, and ✘then the tube is installed into a housing (at the same time, a baffler is formulated in♠side the housing).



Hollow fiber → Knitted fiber (under microscope)&n€bsp;→ Knitted fiber (naked eyes) → End surface
 
Structure of membrane contactor:

  

 

Features of membrane contactor:

1) Hollow fibers are knitted into an array, so that a cerπtain space can be kept between these fibers. In this way, thousands of fibers are connecte↕d as a whole array which can resist strong water flow ‍and will not break. Besides, the mass transfer efficiency can be improved in the array ÷structure.

2) High fiber density makes it possible of ultimate gas removal from >water;

3) Central tube water distribution + Middle baffler structure, c"hange the water flow direction to flush vertically towards hollow fibers, which← can improve the mass transfer efficiency betw≤een shell side and lumen side.
 
CO₂ removal from water is a necessary process in many industries. DiΩssolved CO₂ in feed water of EDI/CDI and ion exchange column should be removed. Using membrane contactor Ωto remove dissolved CO₂ is an easy method without chemical dosing and frequent chemical¥ regeneration, because it is a 100% physical process. At the same time, operation cost is sa±ved and it is more friendly to environment.

Traditional CO₂ removal technology is “alkali dosin g + 2^nd RO” process, while using membrane conta©ctor includes only one step: CO₂ is taken out by vacuum pump and sweep gas.

It has the following advantages compared with “a™lkali dosing + 2^nd RO” process:

     


     
      
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