Desulfurization liquid zero discharge method

The invention discloses a desulfurization liquid zero discharge method. The method comprises the following steps: combining raw flue gas in a desulfurization island with a desulfurization reagent to generate desulfurization slurry; establishing a bypass connected with the desulfurization island in parallel outside the desulfurization island, and continuously leading out part of desulfurization slurry; carrying out chlorine dialysis on the lead-out desulfurization slurry to obtain dialysis slurry and chlorine-rich produced water; the dialysis slurry flows back to the desulfurization island and is desulfurized in the desulfurization island; the chlorine-rich produced water is concentrated or/and evaporated to dryness for crystallization. According to the scheme, the chloride ions in the desulfurization slurry are directly discharged out of the desulfurization island along with the chlorine-rich produced water, and the internal chloride ion balance is maintained after the desulfurization island ...