Coal quality-divided clean efficient conversion pyrolysis upgrading system

The utility model provides a coal quality-divided clean efficient conversion pyrolysis upgrading system which comprises a pyrolysis upgrading furnace, a furnace top sealing feeding system is arranged at the top end of the pyrolysis upgrading furnace, and dried and dehydrated coal is fed into the pyrolysis upgrading furnace by the furnace top sealing feeding system; the pyrolysis upgrading furnace sequentially comprises a preheating section, a pyrolysis upgrading section and a cooling section, coal is preheated with rising pyrolysis gas through the preheating section and then enters the pyrolysis upgrading section to be pyrolyzed, pyrolysis gas is collected through a furnace top filter screen gas collection umbrella and extracted from the furnace top, and coal tar and hydrogen-rich gas are recycled through cooling purification; the coal gas heating furnace is communicated with the pyrolysis upgrading section, and heated coal gas is used as a heat carrier to heat coal; the cooling section is communicated with t