Oxygen-enriched combustion fluidized bed and electricity-to-gas coupled chemical power poly-generation system

The invention discloses an oxygen-enriched combustion fluidized bed and electricity-to-gas coupled chemical power poly-generation system. The system comprises a fluidized bed generator set, a fluidized bed gasification subsystem, a water electrolysis subsystem and a methane synthesis subsystem, wherein high-temperature slag obtained by oxygen-enriched combustion of the fluidized bed generator set is used for heating oxygen in the fluidized bed gasification subsystem; the fluidized bed gasification subsystem gasifies solid waste or solid fuel through oxygen, and synthesis gas obtained through gasification is mixed with flue gas output by the fluidized bed generator set and then compressed to enter the methane synthesis subsystem. The water electrolysis subsystem generates hydrogen and oxygen by electrolyzing water, the oxygen respectively enters the fluidized bed generator set and the fluidized bed gasification subsystem to participate in oxygen-enriched combustion and gasification, and the hydrogen is compres