As we all know, the reason why ultra-pure water equipment can effectively guarantee the water quality of the reverse osmosis membrane plays a big role, but the ultra-pure water equipment will have pollutants after a period of use, affecting the quality of the effluent, mainly calcium carbonate scale, Calcium sulfate scale, metal oxide scale, silicon deposits, and organic or biological deposits, which pollute ultrapure water equipment by external pollution or self-propagation, but reverse osmosis membranes of ultrapure water equipment often have their own The anti-fouling route, today Xiaobian will take you to see how there are pollutants on the membrane of ultra-pure water equipment.
First, it is necessary to reduce the retention of contaminants and some impurities in the concave surface of the membrane surface, and reduce the roughness of the surface of the reverse osmosis membrane of the ultrapure water equipment.
Secondly, it is necessary to enhance the repellent ability of the film to impurities such as salts and to improve the hydrophilicity of the film.
Then, the ultra-pure water equipment reverse osmosis membrane is the same as the charge symbol of the water contaminant, preventing the membrane from attracting impurities by static electricity. For example, the film surface is positively charged to prevent Fe3+ , Al3+ , and cationic flocculants from contaminating the film. By the change of the membrane charge, the contamination of the membrane by organic matter, microorganisms, cationic polymers, surface active agents and colloids can be reduced.
After Z, the water flow channel in the membrane element is improved, and the water flow dead angle is eliminated. First, the water flow turbulence is increased, the concentration polarization is weakened ; the second is to avoid the interception of impurities by the thick water barrier ; and the third is to facilitate the cleaning of the dirt. Elution.
The above is the introduction of the main pollutants and pollution-resistant pathways of ultra-pure water equipment. I hope that it will help everyone and effectively remove the pollutants on the membrane.
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