Wastewater treatment zero-emission method of household garbage incineration power plant

The invention discloses a wastewater treatment zero emission method for a household garbage incineration power plant. The wastewater treatment zero emission of the household garbage incineration power plant is realized. Heat energy of high-temperature flue gas generated by waste incineration and purified by flue gas purification equipment is fully utilized, the heat energy passes through a gas-water indirect type heat exchanger, precipitated wastewater generated in a gas-water direct contact type heat exchanger is heated to about 60 DEG C, then the heated wastewater is introduced into a negative-pressure flash tank, and the waste water is discharged from the negative-pressure flash tank. Water in the wastewater is separated out in the form of water vapor, then the wastewater is introduced into a condensation tank with the same negative pressure for condensation, condensate water is conveyed to a condensation water tank through a booster pump, and finally the condensate water is input into a whole plant water