Novel double-electrode direct-current arc system for melting wastes

A DC arc and double-electrode technology, which is applied in the field of new double-electrode DC arc system, can solve the problems that are not obvious in Figure 1, it is difficult to accurately adjust the heating and temperature of the molten pool, and the stirring of the molten pool is insufficient, so as to speed up the melting ability, The effect of maximizing melting rate and optimizing unit energy consumption
CN107020293AActive Publication Date: 2017-08-08JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU TIANYING ENVIRONMENTAL PROTECTION ENERGY COMPLETE EQUIP CO LTD
Publication Date
2017-08-08

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Abstract

The invention discloses a novel double-electrode direct-current arc system for melting wastes. The novel double-electrode direct-current arc system solves the technical problem of technical defects existed in an existing double-electrode arc technology aiming at the background technology. The adopted technical scheme is characterized in that the novel double-electrode direct-current arc system for melting the wastes comprises a melting furnace, a melting furnace body provided with a fly ash feed inlet and a slag discharge opening, double electrodes vertically inserted into the furnace body, and two lifting systems which are in one-to-one correspondence to the double electrodes and used for adjusting the heights of the double electrodes relative to the surface of a melting pool, wherein the space between the double electrodes vertically inserted into the furnace body is more than two times larger that the height of the melting pool; the two electrodes are connected onto a negative pole and a positive pole of a direct-current power supply; a furnace bottom conductive piece is arranged at the bottom part of the furnace body; and the conductivity of the furnace bottom conductive piece is more than two orders of magnitude higher than the conductivity for melting the wastes. The novel double-electrode direct-current arc system for melting the wastes has the advantages that current distribution in the melting pool is improved, and the fly ash melting pool can be more effectively melted.
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Description

technical field

[0001] The present invention relates to a novel two-electrode DC arc system for waste melting. Background technique

[0002] DC arc melting technology is currently the most commonly used waste melting furnace method. The existing single-electrode DC arc (hereinafter collectively referred to as single-electrode arc) is inherited from the DC steelmaking furnace technology, and there are problems such as difficult maintenance of the furnace bottom electrode and insufficient melting capacity of the single electrode to the molten pool. Double-electrode DC arc (hereinafter collectively referred to as double-electrode arc) melting technology, such as Hitachi Zosen’s JPH08240306 and JP2003336826, and Tetronics’ US2010 / 0078409 patents, do not require bottom electrodes and have better arc ignition and melting. Process flexibility. In addition, JPH09243267A of TAKUMA Company discusses the technology of using a double-electrode system to prevent the cooling of the slag...

Claims

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