- SOLID FUEL STAGED GASIFICATION-COMBUSTION DUAL-BED POLYGENERATION SYSTEM AND METHOD

摘要

The present invention relates to a solid fuel-classified gasification-burning bilayer spraying system, comprising a combustion system, a gasification system, a syngas cooling purification system and a syngas methanation system, wherein the combustion system is connected to the gasification system via a circulation feedback system . The combustion system adopts the circulating fluidized bed combustion system, the gasification system employs the fluidized bed incompletely gasification method, the generated coke is returned to the combustion system for reuse, and the syngas cooling and purging system adopts the water circulation and combustible material recycling method And CO ₂ and water vapor, which are byproducts of the syngas methanation system, can be recycled in a solid fuel-classified gasification-combustion bilayer system, thereby maximizing energy utilization efficiency in the system.