Heat preservation and air supply system and method for burning furnace of hot blast stove

The invention discloses a heat preservation and air supply system of a hot blast stove burning furnace, which comprises a burner body, a combustion valve, a natural gas header pipe, a natural gas branch pipe, a combustion air header pipe and a combustion air branch pipe, the burner body is arranged in a hot blast stove manhole, the combustion valve is arranged in the burner body, and one end of the natural gas branch pipe is connected with the natural gas header pipe. The other end of the natural gas branch pipe is connected with a natural gas inlet of the combustor body, one end of the combustion-supporting air branch pipe is connected with the combustion-supporting air main pipe, and the other end of the combustion-supporting air branch pipe is connected with a combustion-supporting air inlet of the combustor body. Compared with the blowing-out, cooling and re-baking processes of the hot blast stove, the method has the advantages that the damage to refractory materials is small, the service life of the hot