Methanol-to-olefin regeneration method with zero emission of carbon dioxide

The invention discloses a methanol-to-olefin regeneration method with zero emission of carbon dioxide. The method comprises the following steps: mixing a part of pure oxygen gas with circulating flue gas to obtain mixed gas, and enabling the mixed gas and a spent catalyst to enter a regenerator for a coke-burning reaction to obtain regenerated flue gas; the other part of pure oxygen enters the carbon monoxide waste heat boiler; the regenerated flue gas is subjected to cyclone separation to obtain regenerated flue gas without catalyst fine powder, and the regenerated flue gas enters a carbon monoxide waste heat boiler for combustion; part of flue gas at an outlet of the carbon monoxide waste heat boiler serves as circulating flue gas, low-temperature regenerated flue gas is obtained after low-temperature heat exchange is conducted on the remaining flue gas, and dry flue gas is obtained after water is separated through a water separator; the dry flue gas enters the absorption tower to be in countercurrent conta