Improved gas pipeline device

The utility model discloses an improved gas pipeline device which is characterized in that the output ends of a primary side gas pipe and a combustion-supporting gas input pipe are connected to the inlet end of a pre-burner, the pre-burner, a secondary side gas pipe and a purifier are sequentially connected, and the outlet end of the purifier is connected to a combustion furnace through a tertiary side gas pipe; the output end of the primary side air pipe is connected to the tube pass inlet end of the preheater, the input end of the secondary side air pipe is connected to the tube pass outlet end of the preheater, and the output end of the secondary side air pipe is connected to the input end of the combustion furnace; the smoke outlet end of the pre-burner is connected with the shell pass inlet end of the pre-heater through a smoke pipeline, and the shell pass outlet end of the pre-heater is connected with a smoke exhaust pipeline. The combustion efficiency in the combustion furnace can be improved; and part