Emission treatment system for high-salinity wastewater

Abstract

The invention provides an emission treatment system for high-salinity wastewater. The emission treatment system comprises a wastewater collection tank, a regulating treatment tank, a multi-medium filter, an electrodialysis treatment device, a coagulative precipitation unit, an evaporative crystallization unit, a nanofiltration unit and a reverse osmosis desalination device, wherein a water outletend of the wastewater collection tank is connected with the regulating treatment tank, an output end of the regulating treatment tank is connected with the multi-medium filter, an output end of the multi-medium filter is connected with the electrodialysis treatment device, a concentrated water outlet end of the electrodialysis treatment device is connected with the coagulative precipitation unit,a produced water outlet end of the electrodialysis treatment device is connected with the nanofiltration unit, a water outlet end of the nanofiltration unit is connected with the reverse osmosis desalination device, a water producing end of the reverse osmosis desalination device is connected with the electrodialysis treatment device, and a concentrated water outlet end of the reverse osmosis desalination device and a water outlet end of the coagulative precipitation unit are separately connected with the evaporative crystallization unit. The emission treatment system can be used for treatinghigh-concentration salt-bearing wastewater, and environmental pollution can be effectively reduced.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of chemical sewage treatment systems, in particular to a high-salt wastewater discharge treatment system. [0003] 【Background technique】 [0004] At present, for wastewater discharge, industrial wastewater discharge is very harmful. If untreated wastewater that meets the standard is discharged into rivers, ponds or seeps into the ground, it will not only endanger the environment, but also pollute drinking water sources. Mature processes and equipment such as RO reverse osmosis and EDI electric desalination in the existing technology can produce high-quality and efficient production water, but the water production rate of the water production process of the above-mentioned processes is about 75%, that is, : In the process of producing high-quality water, other impurities in the water are separated through membranes and concentrated in 25% concentrated brine. And these brines are usually difficult to...

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Problems solved by technology

And these brines are usually difficult to reuse, so they have to be discharged into water bodies or deep wells

The harmfulness of such a concentrated water treatment mode is gradually emerging, such as causing land salinization and water biological reduction, etc.

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