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Title: Apparatus for in situ heating and vitrification

Abstract

An apparatus for decontaminating ground areas where toxic chemicals are buried includes a plurality of spaced electrodes located in the ground and to which a voltage is applied for bringing about current flow. Power delivered to the ground volatilizes the chemicals that are then collected and directed to a gas treatment system. A preferred form of the invention employs high voltage arc discharge between the electrodes for heating a ground region to relatively high temperatures at relatively low power levels. Electrodes according to the present invention are provided with preferentially active lower portions between which current flows for the purpose of soil heating or for soil melting and vitrification. Promoting current flow below ground level avoids predominantly superficial treatment and increases electrode life.

Inventors:
 [1];  [2];  [1]
  1. (Richland, WA)
  2. (Mount Juliet, TN)
Issue Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
869328
Patent Number(s):
5316411
Assignee:
Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; situ; heating; vitrification; decontaminating; ground; toxic; chemicals; buried; plurality; spaced; electrodes; located; voltage; applied; bringing; current; flow; power; delivered; volatilizes; collected; directed; gas; treatment; preferred; form; employs; discharge; region; relatively; temperatures; levels; according; provided; preferentially; active; portions; flows; purpose; soil; melting; promoting; below; level; avoids; predominantly; superficial; increases; electrode; life; spaced electrodes; ground level; electrodes located; gas treatment; power levels; power level; current flow; preferred form; current flows; power delivered; toxic chemicals; situ heating; below ground; toxic chemical; decontaminating ground; /405/166/

Citation Formats

Buelt, James L., Oma, Kenton H., and Eschbach, Eugene A. Apparatus for in situ heating and vitrification. United States: N. p., 1994. Web.
Buelt, James L., Oma, Kenton H., & Eschbach, Eugene A. Apparatus for in situ heating and vitrification. United States.
Buelt, James L., Oma, Kenton H., and Eschbach, Eugene A. Sat . "Apparatus for in situ heating and vitrification". United States. https://www.osti.gov/servlets/purl/869328.
@article{osti_869328,
title = {Apparatus for in situ heating and vitrification},
author = {Buelt, James L. and Oma, Kenton H. and Eschbach, Eugene A.},
abstractNote = {An apparatus for decontaminating ground areas where toxic chemicals are buried includes a plurality of spaced electrodes located in the ground and to which a voltage is applied for bringing about current flow. Power delivered to the ground volatilizes the chemicals that are then collected and directed to a gas treatment system. A preferred form of the invention employs high voltage arc discharge between the electrodes for heating a ground region to relatively high temperatures at relatively low power levels. Electrodes according to the present invention are provided with preferentially active lower portions between which current flows for the purpose of soil heating or for soil melting and vitrification. Promoting current flow below ground level avoids predominantly superficial treatment and increases electrode life.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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