Sodium chloride recovery zero-discharge treatment method for printing and dyeing wastewater treatment

The invention discloses a sodium chloride recovery zero-discharge treatment method for printing and dyeing wastewater treatment, which comprises pretreatment, a high-pressure seawater membrane device, an electrodialysis device, a seawater membrane device, a microfiltration system reaction tank, a microfiltration membrane device and acid addition. For example, discharge of electrodialysis dilute brine causes waste of residual sodium chloride, so that the electrodialysis dilute brine can be recovered, after concentration, SiO2 in the high-salt and high-silicon sodium chloride concentrated water can be reduced to 20mg/L by using a microfiltration device and adding a magnesium chloride solution (the content of calcium hydroxide is 7.5%) and composite nano liquid caustic soda (the content of calcium hydroxide is 25%), the problem that SiO2 blocks a high-pressure sea light membrane is solved, and the problem that the high-pressure sea light membrane is blocked by SiO2 is solved. The steps are circulated to realize