| 摘要 |
The invention relates to an inductive thermal plasma torch comprising a confinement tube that comprises, longitudinally in relation to the tube, metal fingers which are insulated from each other, an ignition device that comprises an igniter ( 4 ) and an igniter support ( 1, 3 ), the purpose of the igniter ( 4 ) being to initiate a discharge in the plasma of the torch, the support having an electrically conductive end ( 1 ) which is connected to the electrical earth ( 2 ) of the plant and another, electrically insulating, end ( 3 ) which carries the igniter, the ignition device also comprising an electrically conductive connection ( 5 ) connecting the igniter ( 4 ) to the electrically conductive end ( 1 ) of the support so that the igniter is able to initiate the discharge in the plasma, the electrically conductive connection ( 5 ) having a section that is sufficiently narrow to limit the intensity of the current capable of passing through the igniter ( 4 ) in order to avoid electrical arcing by capacitive discharge between the ignition device and another part of the torch.
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