Waste incineration flue gas purification system and integral solution process

The invention relates to the technical field of purification of flue gas, and discloses a waste incineration flue gas purification system and an integral solution process. The system comprises a flue, a dust remover, a decomposition removal device for dioxins, a low-temperature SCR, a MGGH system, a flue gas washing tower, a fly ash collection device, a fly ash washing dewatering system, a wastewater treatment system and an induced draft fan, wherein the inlet side of the dust remover is connected with the flue; the outlet side of the dust remover is connected with the decomposition removal device for the dioxins; the dust remover is connected with the fly ash collection device; the fly ash collection device is connected with the fly ash washing dewatering system; the decomposition removal device for the dioxins successively passes through the inlets of the low-temperature SCR, a flue gas heat-releasing device and the flue gas washing tower via pipelines; the outlet of the flue gas washing tower is connected with the inlet of a flue gas reheating device; the liquid outlet of the flue gas washing tower is correspondingly connected with the fly ash washing dewatering system and the wastewater treatment system; and the outlet of the flue gas reheating device is connected with the induced draft fan. The waste incineration flue gas purification system provided by the invention is low in cost, can effectively purify the flue gas, reduces the concentrations of various pollutants in the flue gas, and basically realizes zero emission of pollution.