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:
Nov. 22, 1977
Filed:
Dec. 19, 1974
John H Knight, Aurora, CO (US);
The Superior Oil Company, Houston, TX (US);
Abstract
A method for improved operation of a cross-flow device for heating and/or cooling a moving bed of solids by reducing residence time and eliminating gas leakage between adjacent heating and cooling zones. A bed of solid particles is formed on a grate for movement through heating and cooling zones or chambers. As the bed of particles is moved through the heating and cooling zones, cross flows of hot or cool gas are passed through the bed normal to the direction of bed movement. The use of downdraft gas flow in each zone of the cross-flow device permits the same pressure profile to be produced in each zone, and a zero pressure differential between zones from top to bottom of the bed. Thus active grate space between adjacent zones is reduced, and greater efficiency obtained. In addition, when heating of the solids is followed by cooling, the passage through the bed of the heating and cooling gas streams in the same direction permits heating of the lowermost particles in the bed after these particles have passed into the cooling zone of the device.