Blast furnace gas boiler

The utility model discloses a blast furnace gas boiler, the aforesaid that aims at overcoming the blast furnace gas boiler existence among the prior art is not enough, provides one kind and can effectively reduce high -temperature economizer boiling degree, reduces boiler exhaust gas temperature, and need not increase a blast furnace gas boiler of furnace size. It includes furnace, horizontal gas pass and vertical flue, and the furnace bottom is provided with the combustor, horizontal gas pass one end and furnace top intercommunication, and the vertical flue of horizontal gas pass other end intercommunication, horizontal gas pass has set gradually high temperature over heater, low temperature superheater and evaporimeter from the one end of connecting furnace, the combustor divide the two -layer wall before furnace that sets up, the combustor include columniform burner body, air duct, gas channel, converter air gun, burning torch and air door. The utility model has following beneficial effects: : (1 )Effectively reduce high -temperature economizer boiling degree and guarantee the economizer safe operation, (2 )Effectively reduce boiler exhaust gas temperature and combustion efficiency.