System for increasing hot air temperature by utilizing molten salt heat carrier

The utility model discloses a system for increasing hot air temperature by utilizing a molten salt heat carrier, which comprises a boiler, an SCR (Selective Catalytic Reduction) denitration device, anair preheater, a coal mill, a molten salt-flue gas heat exchanger, a molten salt tank and a molten salt-hot air heat exchanger, wherein the boiler is communicated with a boiler tail vertical steeringchamber, the boiler tail vertical steering chamber is respectively communicated with the fused salt-flue gas heat exchanger and the SCR denitration device, the fused salt-flue gas heat exchanger is also communicated with the SCR denitration device, and the SCR denitration device is communicated with the air preheater; the fused salt-flue gas heat exchanger is further communicated with the fused salt-hot air heat exchanger, the fused salt-flue gas heat exchanger and the fused salt-hot air heat exchanger are further communicated with the fused salt tank, meanwhile, the fused salt-hot air heat exchanger is communicated w