Series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace

The invention discloses series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace, relates to a fluidized bed-pulverized coal furnace, and aims to solve the problem that two fuels cannot be combusted at the same time, the low-load stable combustion is difficult, a specific pulverized furnace has poor adaptability to coal types and the power consumption of a coal mill is high when the fuel particles and the combustion activities of the conventional pulverized coal furnace are different. The series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace comprises a pulverized coal suspension combustion chamber, a water cooling wall, a combustion fluidized bed, a gasification fluidized bed and an overflow pipe, wherein the combustion fluidized bed and the gasification fluidized bed are positioned on the lower side of an ash cooling hopper in the pulverized coal suspension combustion chamber; the gasification fluidized bed is completely separated from a furnace hearth through the water cooling wall; the gasification fluidized bed is communicated with the combustion fluidized bed through the overflow pipe; the combustion fluidized bed is separated from the furnace hearth by staggered pipe bundles, so that the gasification fluidized bed, the combustion fluidized bed and the pulverized coal suspension combustion chamber are connected in series. The series-connected compounded gas gasification and combustion fluidized bed-pulverized coal furnace is used for high-efficiency combustion of a coal-fired boiler.