PLASMA MELTING METHOD FOR TREATING MATERIAL TO BE TREATED, AND PLASMA MELTING FURNACE USED FOR SAME

Title:

PLASMA MELTING METHOD FOR TREATING MATERIAL TO BE TREATED, AND PLASMA MELTING FURNACE USED FOR SAME

Document Type and Number:

WIPO Patent Application WO/2017/195570

Kind Code:

A1

Abstract:

[Problem] The purpose of the present invention is to provide: a plasma melting method for performing, on a material to be treated such as incineration ash and general waste or industrial waste, a treatment in which plasma is generated at a low voltage in the upper part of a furnace and the material to be treated is efficiently subjected to a melting treatment; and a plasma melting furnace used for the plasma melting method. [Solution] This invention is characterized in that: a coke layer is first laid on the furnace bottom of a plasma electric melting furnace in which a metal layer is placed on the furnace bottom and in which a plurality of electrodes can be moved vertically by an electrode raising/lowering device, and some of a material to be treated that is at least one among general waste, industrial waste, and incineration ash is charged onto the coke layer; the lower ends of the electrodes are positioned near the furnace bottom and the passage of current is commenced at a low voltage; the lower ends of the electrodes are raised while the passage of current is stable; the material to be treated is subjected to an additional surge; plasma is generated at the lower part of the electrodes at an operation voltage obtained by raising the voltage to a high voltage from the low voltage applied during the stable passage of current; and the material to be treated is subjected to a melting treatment.

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Inventors:

ANZAI SETSU (JP)

Application Number:

PCT/JP2017/016005

Publication Date:

November 16, 2017

Filing Date:

April 21, 2017

Export Citation:

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Assignee:

ANZAI SETSU (JP)

International Classes:

F23G5/00

Foreign References:

JP2009073940A	2009-04-09
JP2006040619A	2006-02-09
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JPH09196573A	1997-07-31
JPS4890915A	1973-11-27
JP2002213726A	2002-07-31
JP2001050528A	2001-02-23
JP2009249711A	2009-10-29
JP2004257631A	2004-09-16
JPH11237018A	1999-08-31