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:
Feb. 01, 1983
Filed:
Mar. 13, 1981
Gunnar Stendahl, Linkoping, SE;
STAL-LAVAL Apparat AB, Linkoping, SE;
Abstract
A gas-to-gas heat exchanger comprises a chamber through which pass upwardly at least one first tube for the passage of a first hot gaseous medium and at least one second tube for the passage of a second cooler gaseous medium. The first and second tubes are disposed in spaced-apart relationship and a fluidized bed of particulate material, for example sand, is created in the chamber in the spaces around the tubes, the fluidized bed serving as a heat transfer medium from the first tube(s) to the second tube(s). The heat exchanger, which is particularly suitable for preheating air by heat exchange with a hot, dust-laden gas, may comprise a plurality of the chambers disposed one above the other.