| 摘要 |
<p>This invention provides a high-frequency induction thermal plasma torch (200) having a quadruple pipe structure comprising a first pipe (13) for delivering a mixed raw material gas from its front end, a second pipe (14), which is disposed so as to surround the first pipe (13) for delivering an inert gas from its front end, a third pipe (15), which is provided so as to surround the second pipe (14) for delivering an auxiliary raw material gas from its front end, and a fourth pipe (16), which is provided on the outer side of the third pipe (15) and through which a cooling medium is passed, whereby a solid material is synthesized from the delivered mixed raw material gas and the auxiliary raw material gas. In a part near the front end, a high-frequency coil (21) is further disposed on the outer side of the fourth pipe (16). The front end of the first pipe (13) and the second pipe (14) is located so as to retrograde on the back end side from a section in which, in the fourth pipe (16), the high-frequency coil (21) is disposed. In an internal gas stream (22), the occurrence of vortex flow is suppressed, and the synthesized solid material can be efficiently ejected.</p> |
