Heating – Processes of heating or heater operation – Including passing – treating or conveying gas into or through...
Patent
1985-11-22
1987-05-12
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including passing, treating or conveying gas into or through...
432 98, 432 13, 252378P, F27B 1500
Patent
active
046646230
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is a national phase application corresponding to PCT/EP85/00112 filed Mar. 16, 1985 and based upon a German national application P 34 10897.1 of Mar. 24, 1984 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a process and an apparatus for the thermal treatment of material capable of trickling, swellable or capable of being rendered swellable, containing aluminosilicate, as granular material, in piles, where the piles, in a plurality separated in tiers above one another, and with retention of free space from pile to pile, are placed in a shaft and transported through the shaft after predetermined dwell periods in the several tiers, from top to bottom, starting with the lowermost pile or piles through the discharge, and where the material is acted upon during the dwell periods by hot gases introduced into the free interstices.
BACKGROUND OF THE INVENTION
It is known how to process porous refractories made of swellable material in the manner described above (DE-AS No. 11 65 477). For this purpose, the material to be processed and broken up into the desired pellet size, such as clay or oil shale, is placed into chambers arrayed above one another of a shaft, where each chamber is filled partially only, so that a free interspace remains between a pile present in any one chamber, and the bottom of the next higher consisting of segments rotatable about the longitudinal axis, into which free space burning gases produced by burners arranged laterally in the walls of the shaft are introduced. To avoid clumping of the material, a mechanical loosening of the granular material is effected by the bottoms being driven rotarionally, and their being equipped with teeth pointing downwards and reaching into the proximity of the next bottom.
It has further become known DE AS No. 12 43 827 how to arrange burner chambers on both sides of the shaft, and to connect these with the interior of the shaft by means of passages in the wall of the shaft, where the interior of the shaft is again subdivided into chambers by means of bottoms consisting of rotatable segments. By suitable control of the bottom segments of the individual chambers and the use of a feed device sreening the two burner chambers alternately, the material dropping from chamber shall be blown at alternately, set into turbulent motion, and thus a cross flow heating of the material shall be accomplished.
In the known process, only a relatively low utilization of the energy of the burning gases it attained, since in the first case the burning gases are transmitted only to the pertinent chamber bottoms and onto the surfaces of the granular material to be treated facing the interstices, while in the second case the heating of the material occurs practically exclusively during the short time of the free fall of the material from chamber bottom to chamber bottom. This poor utilization of the energy of the burning gases requires of necessity that a multiplicity of chambers arrayed above one another must be provided in the shaft, because the temperature of the heating and burning gases cannot be too high, so as not to initiate the swelling process in the exterior zones before a sufficient heating in the interior of the several material particles has taken place.
OBJECT OF THE INVENTION
The object of the invention is to provide a process (and apparatus) of the kind mentioned in the introduction in such manner that a thermal treatment of short duration and even distribution of all material particles contained in a pile is achieved, and where different temperature settings and the processing of the material with gases of differents composition is made possible during the dwell periods in the different tiers.
SUMMARY OF THE INVENTION
The object is attained in accordance with the invention in such manner that the material, before being fed into the shaft, is formed into pellets of approximately uniform size with longitudinal and lateral dimensions in the range from 6 to 26 mm, d
REFERENCES:
patent: 2451024 (1948-10-01), Ellerbeck
patent: 3030090 (1962-04-01), Johnson, Jr.
Dr. W. Schellmann, H. Fastabend, Die Ziegelindustrie, 1963, No. 24, pp. 899-905.
K. Briem et al., Keramische Zeitschrift, yr. 31, No. 5, 1979, pp. 292-294.
Laurien Hanno
Reye Hans
Sundermann Erich
Vahlbrauk Wolfgang
Dubno Herbert
Perfluktiv-Consult AG
Ross Karl F.
Yuen Henry C.
LandOfFree
Process and apparatus for the thermal treatment of trickling mat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process and apparatus for the thermal treatment of trickling mat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process and apparatus for the thermal treatment of trickling mat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1799331