High-quality utilization process of CO2 in household garbage incineration chelated fly ash

The invention provides a high-quality utilization process of CO2 in household garbage incineration chelated fly ash, which comprises the following steps: S1, adding raw fly ash, acid and water into an acidic ash dissolving device for reaction, and carrying out solid-liquid separation on mixed slurry obtained by the reaction to obtain filtrate, filter residues and waste gas; performing multi-stage leaching and solid-liquid separation on filter residues to obtain refined ash, and performing heavy metal enrichment and calcium resource recycling on filtrate to obtain salt; s2, the waste gas enters a first-stage spraying device and a second-stage spraying device; alkali liquor is sprayed into the second-stage spraying device, sodium carbonate spraying liquid is obtained after spraying, the sodium carbonate spraying liquid flows back to the first-stage spraying device, and a sodium bicarbonate saturated solution is formed after CO2 is absorbed; carrying out solid-liquid separation on the feed liquid containing the