Auto-precipitation pretreatment method of high-salt wastewater
A precipitation treatment, high salt content technology, applied in the direction of flocculation/sedimentation water/sewage treatment, heating water/sewage treatment, water/sewage multi-stage treatment, etc. , cumbersome operation and other problems, to achieve the effect of easy operation and maintenance, reduce infrastructure costs, and reduce the amount of sediment
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[0020] Attached below figure 1 The embodiments of the present invention will be described.
[0021] High-salinity wastewater enters the water distribution adjustment tank, and environmentally friendly phosphorus-free chemicals (such as conventional polyepoxysuccinic acid and sulfonate copolymer or PA3, etc.) are added in the adjustment tank at a dosage of 3 to 5 mg / L , Mix thoroughly; then use the lift pump and high-pressure pump to introduce the concentrated water of the distribution pool into the membrane separation system. The membrane separation system is a near nanofiltration membrane system of no more than 0.25 microns. The operating pressure of the system is 0.35~3MPa to achieve Ca 2+ , Mg 2+ , SO 4 2- The separation rate of 99% of equal divalent ions and monovalent ions greatly reduces the salt content of the effluent. The concentrated water of the membrane separation system is recovered and enters the high-efficiency sedimentation tank. A small amount of magnesium removal...
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