Coke oven system and application thereof

The invention discloses a coke oven system and the application thereof. The coke oven system comprises a chemical-looping combustion device, wherein the chemical-looping combustion device comprises acoal gas main tube, a preheater, a lower ejection tube, a fuel reactor, a lifting tube, a first cyclone separator, a second cyclone separator, a tail gas main tube and an oxygen carrier supply feeder;one end of the preheater is connected with the coal gas main tube; the other end of the preheater is connected with the lower ejection tube; the lower ejection tube is connected with the fuel reactor; a coke oven gas is directly fed into the fuel reactor through the lower ejection tube; a top oxygen carrier inlet of the fuel reactor is connected with an outlet in the bottom of the secondary cyclone separator; an oxygen carrier/tail gas outlet of the fuel reactor is connected with a lifting tube; the other end of the lifting tube is connected with the first cyclone separator; the top outlet end of the first cyclone sep