Water washing dechlorination treatment process for household garbage incineration fly ash

The invention belongs to the technical field of catalysis, and particularly relates to a washing dechlorination treatment process for household garbage incineration fly ash. Comprising two working sections of washing and water treatment, in the washing section, the fly ash is subjected to secondary washing, and water-soluble components in the fly ash are basically dissolved out and removed; the water treatment section realizes resource recovery of chloride salt through purification and impurity removal, pH regulation and MVR evaporation salt production treatment, water in a solution is basically recovered in a steam condensate manner, and then the solution is sent back to the washing section for cyclic utilization; a proper amount of air is added into dead steam evaporated by the MVR, the dead steam is heated and passes through the catalytic hydrolysis-combustion treatment reactor, and enriched organic components including chlorine-containing organic components are basically converted into carbon dioxide and