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

Active Publication Date: 2015-12-16
JIANGSU SUNPOWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the disposal of solid miscellaneous salts is an important problem

Method used

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  • Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge
  • Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge
  • Method and system for recycling crystallized salt resources in high-salt-content wastewater zero discharge

Examples

Experimental program
Comparison scheme
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Example Embodiment

[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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Abstract

The invention discloses a method for recycling crystallized salt resources in high-salt-content wastewater zero discharge. Salt-containing wastewater is treated through one or more of a pretreatment system, a membrane concentration system, a nanofiltration membrane system and an evaporation crystallization system to obtain recycled water and solid salt. The invention further discloses a system for recycling crystallized salt resources in high-salt-content wastewater zero discharge. The system comprises the pretreatment system, the membrane concentration system, the nanofiltration membrane system and the evaporation crystallization system, wherein one or more of the systems is/are used for treatment; the evaporation crystallization system comprises one or more evaporation devices and one or more crystallization devices. The multiple evaporation devices are connected in parallel or in series or connected in a parallel connection and serial connection mixed mode, and the multiple crystallization devices are connected in parallel or in series or connected in a parallel connection and serial connection mixed mode. 15-25% of three-high wastewater treated by a traditional water treatment technology is further treated, the recovery rate of the wastewater reaches over 95%, meanwhile, salt is crystallized to be solid abraum salt, and then high-salt-content wastewater zero discharge is achieved.

Description

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Claims

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Application Information

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Owner JIANGSU SUNPOWER TECH
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