The invention discloses a synergistic domestic garbage and high-alkali
coal pyrolysis gasification device and method adopting a three-stage type process. A
pyrolysis chamber, a
combustion chamber and a gasification chamber are sequentially connected to form a three-stage type synergistic domestic garbage and high-alkali
coal pyrolysis treatment environment; a feeding
system is connected to a pyrolysis chamber inlet; an ash collection device is arranged at each of ash collection ports of the pyrolysis chamber and the gasification chamber; the gasification chamber is connected and communicated with the pyrolysis chamber through a gas storage device; a domestic garbage material is conveyed into the pyrolysis chamber through a screw feeder, is dried on a reciprocating grate and is subjected to pyrolysis
precipitation and volatilization; volatilized pyrolysis gas and
tar enter the
combustion chamber and are completely burned in the
combustion chamber under enough air; high-alkali
coal enters a central area of the gasification chamber and is in contact with
flue gas generated by combustion for reaction, so that clean gasification gas is obtained and enters the gas storage device. The synergistic domestic garbage and high-alkali
coal pyrolysis gasification device and method disclosed by the invention can effectively solve the problem that a large amount of
tar and
hydrogen chloride is contained in synthetic gas generated by a traditional domestic garbage gasification furnace can be effectively solved, so that the quality of the gasification gas is greatly improved, and the further utilization of the gasification gas is facilitated.