Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge
A technology for resource recovery and saline wastewater, applied in chemical instruments and methods, alkali metal sulfite/sulfite, water pollutants, etc., can solve problems such as hindering zero discharge of high saline wastewater, and reduce operating costs Effect
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[0040] Example 1
[0041] Such as figure 2 As shown, a zero-discharge crystallization salt resource recovery system for high-salinity wastewater includes a pretreatment system, a membrane concentration system, and an evaporation crystallization system; the evaporation crystallization system includes a sodium sulfate evaporation crystallization device and a chlorination system connected in series. Sodium evaporation crystallization device and mixed salt evaporation crystallization device, sodium sulfate evaporation crystallization device is composed of the first evaporation device and first crystallizer in series, sodium chloride evaporation crystallization device is composed of second evaporation device and second crystallizer in series, mixed salt The evaporation crystallization device is composed of a third evaporation device and a third crystallizer in series; the water outlet of the pretreatment system is connected with the water inlet of the membrane concentration system, an...
Example Embodiment
[0050] Example 2
[0051] Such as image 3 As shown, a zero-discharge crystallization salt resource recovery system for high-salt wastewater includes a pretreatment system, a membrane concentration system, a nanofiltration membrane system, and an evaporation crystallization system; the evaporation crystallization system includes sodium sulfate evaporation crystallization device, chlorine Sodium sulfide evaporation crystallization device, mixed salt evaporation crystallization device, sodium sulfate evaporation crystallization device and sodium chloride evaporation crystallization device are connected in parallel with mixed salt evaporation crystallization device; sodium sulfate evaporation crystallization device is connected in series with the first evaporation device and the first crystallizer The sodium chloride evaporation crystallization device is composed of a second evaporation device and a second crystallizer in series, and the mixed salt evaporation crystallization device...
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