The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1987
Filed:
Sep. 08, 1986
Robert Hardison, Santa Ana, CA (US);
N Robert Crain, Huntington Beach, CA (US);
Other;
Abstract
A sealed, negative pressurized, high temperature furnace, through which hydrocarbon contaminated soil is conveyed, is operated in the near-infrared heating region at radiation wavelengths between about 0.75 and about 3.0 um. The furnace, rotary sealed at the input and exit ports and maintained at a negative pressure, is in the form of an elongated cylinder, divided into four series-arranged heating zones, each of which is separately fed by a preferably stoichiometric mixture of a combustible gas, preferably propane and air. The flow of the gas/air mixture into each of the heating zones is regulated so that the first zone is maintained at about 2900.degree. F. normally, (3000.degree. F. maximum), the second zone is maintained at about 2900.degree. F. normally, and the third and fourth heating zones are maintained at about 2900.degree. F. normally.