Concentration reduction method and concentration reduction device for reverse osmosis concentrated water
A technology of reverse osmosis concentrated water and pervaporation, applied in chemical instruments and methods, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of reducing process stability, pollutant concentration requirements, and high operating costs. Achieve the effects of improving the scope of application and concentration efficiency, improving anti-pollution performance, and improving concentration effect
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[0049] Experimental example: In this embodiment, the actual reverse osmosis concentrated water membrane concentrated liquid wastewater is used as raw water, which is sent to the debugging equipment of the concentration and weight reduction device for testing. The designed flow rate of the raw water is 30L / H, and the raw water passes through the first heat exchanger 6 After heating, the temperature rises to 60°C and enters the pervaporation device 7. The circulation pipe 4 on the water inlet side of the pervaporation device 7 maintains an absolute pressure of 10-30Kpa, and the vacuum pump 13 in the fresh water recovery device maintains a continuous working state to provide enough for the membrane. Vacuum.
[0050] The test results show that the total water production is 13kg, the concentrated water is 8.4kg, the reuse rate is 61%, and the average flux is 7.2LMH; and the secondary concentrate after concentration of the present invention is turbid and the flux is obviously reduced...
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