Organic compound destruction and removal efficiency (DRE) for plasma incinerator off-gases using an electrically heated secondary combustion chamber

Whitworth, C.G.; Babko-Malyi, S.; Battleson, D. M.; Olstad, S.J.

doi:10.1016/s0956-053x(98)00134-2

Cited by 3 publications

(1 citation statement)

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“…The air plasma torches with hollow electrodes can provide not only sufficient heat to decompose organic wastes into their constituent elements but also the oxygen required to convert the decomposed organic elements into stable and innoxious elements. For this reason, they have been widely used for treatments of hazardous chemicals, radioactive wastes and municipal solid wastes [1][2][3][4][5][6][7]. In contrast to the numerous studies on practical developments and applications, only a few research papers on the theory of hollow electrode torches have been reported to date.…”

Section: Introductionmentioning

confidence: 99%

Operational features and air plasma characteristics of a thermal plasma torch with hollow electrodes

Hur¹,

Hong

2003

Plasma Sources Sci. Technol.

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The operational features and thermal plasma characteristics of a plasma torch with hollow electrodes are investigated based on their dependence on input current, gas flow rate and electrode diameter when air is used as a plasma gas. A plasma torch with a hollow cathode and anode has been designed and fabricated, and the arc voltages and thermal efficiencies are measured from its discharge. The newly modified similarity criteria are derived from the measured data related to torch performances. From the fact that these criteria successfully describe both the arc voltage and thermal efficiency behaviour of the torch, depending on its operating and geometrical parameters, it is proved that they can be usefully applied to the design and operation of high power torches. For the numerical modelling of the interior region of the torch, a cold flow analysis is employed along with a simplified balance equation of the Lorentz and gas dynamic drag forces in order to determine a cathode spot position on the cathode surface. The validity of this method is confirmed by comparison of the calculated and measured net powers. As a practically useful result of this analysis, carried out through this numerical and experimental work, it is suggested that low input current, high gas flow rate and relatively large electrode diameter are more favourable as appropriate operating conditions of the torch for the efficient treatment of hazardous organic wastes.

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