Heating boiler desulfurization wastewater zero discharge system

The utility model relates to a heating boiler desulfurization waste water zero discharge system which comprises a desulfurization gypsum treatment system, a desulfurization waste water storage system, a desulfurization waste water filtering system and a desulfurization waste water recycling system which are connected in sequence, and the desulfurization waste water recycling system at least comprises a first conveying pipeline, a second conveying pipeline and a third conveying pipeline. The first conveying pipeline, the second conveying pipeline and the third conveying pipeline are respectively used for being connected with a desulfurization pulping tank, a boiler slag tank and a desulfurization demister at the upper part of a desulfurization tower. The desulfurization waste water is conveyed to the sulfur slurrying tank, the boiler slag tank and the desulfurization demister at the upper part of the desulfurization tower through the desulfurization waste water recycling system, and can be directly used for sl