Zero discharge system and method for high-hardness salt-containing wastewater
The invention relates to a zero discharge system and method for high-hardness salt-containing wastewater, the zero discharge system comprises a membrane concentration system, a regenerated waste liquid treatment system and an evaporative crystallization system, the membrane concentration system comp...
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| Hauptverfasser: | , , , , , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention relates to a zero discharge system and method for high-hardness salt-containing wastewater, the zero discharge system comprises a membrane concentration system, a regenerated waste liquid treatment system and an evaporative crystallization system, the membrane concentration system comprises an ion exchange hardness removal unit, a primary membrane concentration module and a secondary membrane concentration module; a membrane concentration concentrated water outlet of the membrane concentration system is connected with a regenerated liquid inlet of the ion exchange hardness removal unit, a regenerated waste liquid outlet of the ion exchange hardness removal unit is connected with a liquid inlet of the regenerated waste liquid treatment system, and a liquid outlet of the regenerated waste liquid treatment system is connected with a liquid inlet of the evaporative crystallization system; the evaporative crystallization system comprises two or more of a sodium chloride evaporative crystallization un |
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