Environment-friendly furnace mouth sealing structure of heating furnace

The utility model discloses an environment-friendly furnace mouth sealing structure of a heating furnace, belongs to the technical field of industrial heating furnaces, and aims to solve the technical problem that the production takt is affected due to the fact that a fire blocking curtain is poor in sealing effect and high in replacement difficulty in the prior art. The device comprises a bottom plate, and a plurality of supporting columns are arranged on the upper end face of the bottom plate and used for supporting a furnace body; the furnace body is connected with an energy recovery assembly, and the energy recovery assembly is used for recycling heat of gas exhausted by the furnace body; an adjustable fireproof curtain assembly is arranged at the discharge port of the furnace body and comprises guide grooves formed in the two sides of the discharge port of the furnace body, a hanging plate is connected to the guide grooves in a sliding mode, a plurality of connecting plates are evenly arranged on the han