What are the cleaning methods of the membrane in reverse osmosis pure water equipment?

What are the cleaning methods of the film in thereverse osmosis pure water equipment? Wallan water treatment for you to detailin our daily use of reverse osmosis membrane process, 4040 reverse osmosis membrane is relatively commonly used, reverse osmosis film after a period of time after the need to be cleaned or replacedSo do you know how to clean the 4040 reverse osmosis membrane? In the long-term membrane separation process, the 4040 reverse osmosis membrane of the water penetration will be reduced with the increase of running time, this phenomenon is due to membrane pollution problemsIt can be seen that the membrane component system must be cleaned regularly, in order to 4040 reverse osmosis membrane surface or membrane hole pollution removal, to restore water penetration, extend the membrane lifeNext, The Wallan water treatment small editor and you share the next 4040 reverse osmosis membrane cleaning method typereverse osmosis membrane cleaning scheme is divided into physical and chemical methods, both methods can effectively clean the membranephysical method: This method uses mechanical force to remove contaminants from the membrane surfaceThere is no chemical reaction throughout the cleaning processchemistry: the use of a chemical substance and membrane filter cake chemical reaction to achieve the purpose of cleaning the membrane4040 reverse osmosis membrane cleaning physical method
1, manual scrubbing method
method is a relatively primitive but effective methodThe mother's approach is to tear apart the flat film with a soft substance (such as a sponge) gently wipe the dirt on the film surface, while wiping the edge with water rinse, this method can effectively remove a large amount of dirt on the membrane surfaceBut there is nothing to do with the smaller impurities in the deep membrane hole2, iso-pressure hydraulic flushingany configuration of the ultrafiltration components can use this method for membrane cleaning The specific approach is to close the water-producing valve, open the thick water outlet valve, rely on the increased flow rate of flushing the membrane surface, which is effective for removing a large number of soft impurities on the membrane surface The effect of isopressing flushing is also related to the frequency of continuous flushing 3, reverse flushing method
reverse flushing method is a method from the back of the membrane (porous support layer) to the front (tight layer) This is an effective cleaning method After the reverse flushing film, and then carry out the iso-pressure hydraulic flushing method, the cleaning effect is very obvious 4, hot water flushing method
the use of heated water (30 to 40 to C) to flush the surface of the membrane, for those viscous and hot-soluble impurities (such as sugar) removal effect is obvious 5, water one-gas mixed cleaning method
will be purified compressed air and water together into the ultrafiltration device, water-gas mixture fluid will produce a sharp stirring action on the membrane surface to remove more stubborn impurities The effect is also better the principle of selecting chemicals when cleaning 4040 reverse osmosis membranes: First, no chemical reaction seise with the membrane and other component materials, and second, secondary pollution cannot be caused by the use of chemicals When using chemical cleaning methods, isometric flushing and reverse flushing are often used to remove contaminants from the membrane surface more effectively oxidizing cleaning agent uses 1% to 3% H2O2, 500 to 1000mg/LNaCl0 and other aqueous solution for 4040 reverse osmosis membrane cleaning, not only remove dirt, but also kill bacteria H2O2 is a commonly used fungicide enzyme detergent cleaning such as O.5% to 1.5% gastric protease, trypsin, etc., in 4040 reverse osmosis membrane cleaning is effective in the removal of protein, multi-refining, polysaccharides, fat-type pollutants 4040 reverse osmosis membrane element is an important component of reverse osmosis pure water equipment, so regular 4040 reverse osmosis membrane cleaning is essential