Heating – Accessory means for holding – shielding or supporting work... – Support structure for heat treating ceramics
Patent
1982-09-28
1985-06-18
Camby, John J.
Heating
Accessory means for holding, shielding or supporting work...
Support structure for heat treating ceramics
110195, 431 7, 431170, F27D 500, F23D 340
Patent
active
045239070
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention concerns a holder for firing ceramic briquettes, especially clay tiles, and a method for firing the ceramic briquettes in these holders.
BACKGROUND ART
Holders for firing ceramic briquettes are known in various forms. The holders, which accommodate the ceramic, mostly platelike, briquettes are stacked on top of one another on a firing conveyor. The firing of ceramic briquettes in this type of holder has, up until now, primarily taken place in tunnel kilns with gas or oil firing. In firing the tunnel kiln with solid fuel, it is also already known to blow fine coal or coal dust into the tunnel kiln. This leads to an undesirably high dust emission and to an equally undesirable dirtying of the firing conveyor.
THE INVENTION
The object of the invention is to devise a holder for firing ceramic briquettes with solid fuel as well as a method for firing ceramic briquettes in such a holder. The new holder and the new method should avoid the disadvantages of the previously known method of firing with solid fuel and enable a clean heating of the tunnel kiln with solid fuel without dirtying the firing conveyor and without dust emission. In addition, it should be possible to distribute the fuel in the kiln area according to the different heating needs over the breadth of the kiln. In addition, it should be possible also to use lower quality fuel.
The resolution of this problem takes place according to the invention in that solid fuel is arranged between the floor of the holder and the briquettes.
It is thereby expedient to provide depressions in the floors of the holders for holding the solid fuel.
Further, it is proposed that seating areas for the briquettes be provided over the solid fuel.
Before placing the briquettes in the holders, the holders are first filled with solid fuel and then the briquettes are arranged in the holders. Finally, the holders filled with fuel and briquettes are stacked on top of and next to each other on the firing conveyor.
Via a predetermined filling of the holders with coal, it is possible to provide larger quantities of fuel, for example in the bottom row of holders, where the heat requirements are necessarily greater than in the upper rows. Therefore, distribution of the fuel can be targeted to the special heating needs of the specific holders.
By using these holders, the ceramic tiles as well as the firing conveyor remain ash-free, and it is possible to supply the entire amount of fuel necessary for firing exclusively by filling the holders. To remove the ashes, it is sufficient, after removing the fired briquettes, to top over the rack so that the ashes fall out. If required, additional cleaning apparatuses, for example rotary brushes or vacuum equipment, can be utilized.
As the briquettes are grouped together in rows in the holders, the spaces between them create good air access for burning the coal in the racks. For a heat requirement of about 1200 kJ/kg of burned material, for example, it is sufficient to spread the fuel in a layer of a few centimeters in depth.
When using gas-rich solid fuel, it is advantageous to operate the tunnel kiln according to the method of German Pat. No. 26 43 406 published Oct. 11, 1979, granted Feb. 4, 1980.
Using this firing method results in the unburned, escaped volatile fuel particles in the heating area being still burned up when passing back through the firing zone.
According to a further feature of the invention, the separator pieces of the holders are formed as individual pieces.
It has been shown to be an advantage to construct the holders, in cross-section, U-shaped, L-shaped or H-shaped.
It is also advantageous to form the seating area for the briquettes of perforated or profiled plates.
Such perforated or profiled plates function as a supporting element and as an intermediate cover for the fuel.
Through the provision of such plates, the fuel is indirectly heated and, depending upon the requirements, the intermediate cover can be so constructed that none of the heating gases or predetermined portions of hea
REFERENCES:
patent: 1146424 (1915-07-01), Graves et al.
patent: 1906785 (1933-05-01), Bandini
patent: 3033191 (1962-05-01), Bonadiman
patent: 3988107 (1976-10-01), Koch
LandOfFree
Holder and method of firing ceramic briquettes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Holder and method of firing ceramic briquettes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holder and method of firing ceramic briquettes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-978408