Reverse osmosis method for treating sewage

Abstract

By the method, muddy circular water is preprocessed to adjust its pH value to 7-7.5, and is send into aeration tank to get rid of ironion, then is send into mechanical reaction tank to uniform mix flocculator and coagulant aids, it is became preprocessed water after getting rid of partial suspended substances by cantboard precipitation tank. One part of preprocessed water is send into blending water tank after getting rid of impurity by filter, the other part is send into ozone reaction tank to get rid of larger impurity in water by mutiple medium filter after disinfection, then it is send into microfilter to entrapment particle (diam more than 20 um), and is send into safety filter to entrapment particle (diam more than 5 um) and primary get rid of salt by first stage reverse osmosis treatment, one part is send output, one part is send to blending water tank to be blended to clean circular water, the other part is processed by secondary reverse osmosis treatment and mixed bed treatment.

Description

technical field [0001] The invention relates to a water reverse osmosis treatment method. Background technique [0002] Iron and steel companies produce tens of millions of tons of sewage every year in the process of surface cleaning and circulating cooling. The pH of the sewage is unstable, the suspended solids are high, the color is large, and the content of oil, iron, and inorganic salts is high. It is more difficult to treat than ordinary sewage. Especially when the chlorine content is high, the key is to remove the salt and chloride ions in the water, and the reverse osmosis sewage treatment method is adopted. Compared with desalination and separation methods such as electrodialysis and ion exchange, the reverse osmosis sewage treatment method has the advantages of no phase change, no heating, simple equipment, high efficiency, less land occupation, low energy consumption, and simple operation. For sewage with a high concentration of salt, the reverse osmosis sewage tr...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency that the existing reverse osmosis sewage treatment method cannot handle the waste water with high impurity content produced by iron and steel enterprises, the present invention provides a reverse osmosis sewage treatment method, which can treat the waste water produced by iron and steel enterprises

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