Household garbage gradient utilization system based on double-bed pyrolysis

The utility model discloses a household garbage gradient utilization system based on double-bed pyrolysis, which comprises a circulating fluidized bed combustion system for fully oxidizing and combusting garbage coke to generate steam for supplying heat or generating electricity, the fixed bed garbage pyrolysis system is used for converting the dried household garbage into coke and synthesis gas; and the synthesis gas treatment system is used for cooling and purifying the synthesis gas, separating out tar and other impurities and obtaining combustible gas. According to the utility model, garbage coke is combusted instead of pulverized coal, so that the coal consumption is reduced, the household garbage is efficiently treated, tar, combustible gas and thermoelectric products are produced through two processes of coupled combustion and pyrolysis, the pyrolysis temperature can be regulated and controlled on the basis of market requirements, different product distributions are obtained, and the gradient utilizati