Raw coal pyrolysis waste heat recovery system

The utility model discloses a raw coal pyrolysis waste heat recovery system, and relates to the field of raw coal pyrolysis equipment. The raw coal pyrolysis waste heat recovery system comprises a pyrolysis square furnace, a fuel remelting device, a steam-water separator and a micro-positive pressure control device, the inlet end of the fuel remelting device is connected with a hydrogen production system, and the outlet end of the fuel remelting device is connected with the fuel inlet end of the pyrolysis square furnace; the cooling section of the pyrolysis square furnace is provided with a waste heat recovery device, and the waste heat recovery device comprises a heat exchange pipeline; the steam-water separator is arranged at the outlet end of the heat exchange pipeline, and the steam outlet end of the steam-water separator is connected with a steam pipe network; the micro-positive pressure control device is arranged at the top of the pyrolysis square furnace and can control the furnace top of the pyrolysis