Taiyo Nippon Sanos (TNSC) has developed a large-sized waste gas abatement system of combustion type named Innova-FLASH which controls the emission of NOx by two-step combustion of enriched oxygen to treat toxic gases like hydrogen cyanide (HCN) or Ammonia (NH3).

Carbon fiber is being used extensively in the fields of aerospace, automobile production and construction/civil engineering. TNSC intends to put emphasis upon the activities to propose the processor for the purposes of expansion and replacement. The composition and flow-rate of the waste gases from the carbon fiber producing process are different depending upon the gases used in the process.

To produce a flame resistant fiber, a great deal of gases containing air-based HCN or NH3 are exhausted from the flame resisting process to oxidize by heat at 200 to 300℃. On the other hand, similar nitrogen-based gases are also discharged from the carbon fiber producing process where the fiber after the flame resisting process is combusted in an inert atmosphere at 1000 to 2000℃.

These gases have so far been treated collectively by air combustion, but it has been difficult to reconcile the emission control of NOx with the decomposition of HCN or NH3. With the newly developed system, however, the emission control of NOx has turned out to be possible by the treatment in a reactive atmosphere which is compatible with each exhausted gas. 　(See figure.)

The utilization of exhausting heat in a high-temperature atmosphere to the low-temperature oxidizing atmosphere makes it possible to save energy by 50% comparing with the conventional waste gas abatement system of air combustion type.