Hydraulic and earth engineering – Soil remediation – In situ contaminant removal or stabilization
Patent
1997-11-25
1999-02-23
Taylor, Dennis L.
Hydraulic and earth engineering
Soil remediation
In situ contaminant removal or stabilization
651348, 65158, 405131, 432206, 588252, B09B 300
Patent
active
058736751
ABSTRACT:
Apparatus (10) and a method for vitrifying hazardous waste includes a melting vessel (12) in which hazardous waste and any other necessary components for forming a glassy mixture upon heating are introduced for heating by a heater (38), and a metallic containment vessel (46) of the apparatus receives the melting vessel so as to receive and contain any material that exits the melting vessel upon failure. A voltage is applied across spaced electrical connections (72) of the melting vessel (46) to heat material within the melting vessel. Any failure of the melting vessel (12) is detected by a sensor (48). Different embodiments of the heater (38) provide current flow through molten material (18) being heated, induction heating, electric resistance heating, and using the metallic mixing vessel (12) as an electric resistance element. A stirrer (39) can be utilized to mix the material (18) during the heating. The containment vessel (46) is preferably hermetically sealed around the melting vessel (12) to contain gases as well as any melted material received from the failed melting vessel (12). The sensing of the failure can be either by a pressure change in the hermetically sealed chamber (58) or by sensing of the presence of material received by the containment vessel (46) from the failed melting vessel (12) such as by electrical circuit type detection.
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"A Double Wall Alloy Construction Vitrification System for Application to Hazardous and Radioactive Wastes", 1995 International Incineration Conference, Seattle, Washington, May 8-12, 1995, Kenneth R. Kormanyos and Stephen F. Cox, pp. 517-519.
Cox Stephen F.
Kormanyos Kenneth R.
Wetmore Kenneth H.
Stir-Melter, Inc.
Taylor Dennis L.
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