Membrane deaerators

Membrane deaeration - the most effective and multi-purpose method of water removing from all dissolves gases/water aeration, which extensively used in many industries.

 

Membrane contactor operating principle consist of diffusion transfer of dissolved gases (oxygen and/or carbonic acid) to inert carrier flow or to vacuum through hydrophobic membrane pores. The membrane organize the interphase and play a part such as barrier for water (water doesn’t pass through membrane as it is not moistened) and let to amplify a big phase contact area. For highest packing characteristic of membrane modules with microporous hollow-fiber membrane are used.
 
   
There are 3 ways to organize the process of membrane deaeration: with carrier gas delivering into membrane fibres, with vacuum inside the fibres and mixed method, from one side there is gas supplying, from the other vacuum keeping by liquid-packed vacuum pump. Water supplies to interfiber area with backflow to carrier gas supplying.
 

 

The membrane deaeration sets are made from membrane modules, which has a membrane square from 0,18 to 220 m2.
Single modules rate within 30 l/h – 90 m3/h.
Changing a water flow through modules and vacuum level (or blow-down with inert gas rate) it is possible to regulate residual concentration of the dissolved gases in water.

 

Membrane deaerators advantages:

  • The modular design allows to change output of installations and rate of extraction of gas to a greater or lesser extent depending on requirements;
  • High and stable quality of water conditioning;
  • Wide flow variety and large model range;
  • Compactness and small weight;
  • Simple mounting and maintenance;
  • Chemical agent absence in deaeration process;
  • Absence of direct contact of phase;
  • Ecological compatibility.

 

Membrane deaerators disadvantages:

  • High operating costs (constant nitrogen consumption).