Device for producing carbon nanotube fibers and method for producing carbon nanotube fibers using same

The present invention relates to a device for producing carbon nanotube fibers and provides a device for producing carbon nanotube fibers, the device comprising: a vertical-type reactor body which has a reaction area; a concentric shaft double pipe-type inflow tube which has an inner tube and an outer tube, the inner tube injecting, into the reaction area, a spinning raw material comprising a spinning solution and a first gas, and the outer tube forming a concentric shaft annular part surrounding the inner tube, and injecting a second gas into the reaction area through the concentric shaft annular part; a heating means for heating the reaction area; and a carbon nanotube fiber discharging part which is installed on the lower end of the reaction area, wherein the spinning raw material flown into the upper end of the reaction area through the inner tube of the inflow tube moves from the upper end of the reaction area toward the lower end thereof and carbonizes and graphitizes, thereby forming carbon nanotube fibers formed of a continuous aggregate of carbon nanotubes, and the second gas flown into the upper end of the reaction area through the outer tube of the inflow tube moves from the upper end of the reaction area toward the lower end thereof and forms a gas curtain surrounding the circumference of the continuous aggregate of carbon nanotubes. The device, according to the present invention, minimizes contamination due to contamination of an inner wall and enables the smooth discharge of produced carbon nanotube fibers, and thus is preferable for a continuous process.