Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1985-06-21
1987-12-08
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 31, 34 52, 34204, F26B 304
Patent
active
047110384
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with a run-through brick drying plant, which operates by the chamber dryer principle, in which the brick loads to be dried are brought on an inlet conveyor through a front door into the drying chamber, and out of which drying plant the brick loads are, after drying, removed from the opposite side of the drying plant through the rear door.
The invention is further concerned with a control method for the brick drying plant subject of the invention.
In prior art, as lumber drying plants, so-called run-through chamber drying plants are known. Their construction is such that dryer loads consisting of dryer packages are brought into the drying chamber along a roll track placed ahead of the drying plant, from which the loads are pushed into the dryer chamber. The ready dried loads are taken out through the opposite door of the dryer chamber. It is an advantage of these prior-art chamber dryers that therein the time of exchange of the load is relatively short. A drawback is, however, the costly and complicated construction of the drying plants.
It is an object of the present invention to provide a simple solution which permits a substantial reduction in the drawbacks stated above as well as to provide such a chamber drying plant in which the above properties of a chamber drying plant are retained.
It is a further object of the present invention to provide such a brick drying plant in which the drying of the bricks can be carried out more advantageously and economically than in prior art.
One of the goals of the invention is to provide a novel control method for a brick drying plant, which method can be accomplished by means of relatively simple control devices.
The brick drying plant in accordance with the invention is mainly characterized in that the brick drying plant comprises two or more drying chambers connected in series, each of which said chambers operates independently so that, when the brick loads are shifted from the preceding drying chamber into the subsequent drying chamber, in the latter chamber the drying of the brick load is continued substantially from the point of the drying formula that had been reached in the drying in the preceding chamber.
On the other hand, the control method in accordance with the invention is mainly characterized in that such a control system has been fitted so as to control the operation of the group of drying chambers connected in series with each other as has as many control units as there are drying chambers in the said group of drying chambers, and that, after a drying formula in accordance with the brick load to be dried at each particular time has been fed into a certain control unit, the control signal of the said control unit is arranged so that it follows along with the brick load concerned to be dried and so that it is connected so as always to control the control devices of the drying chamber in which the load concerned to be dried is at each particular time.
In the brick drying plant in accordance with the invention, the advantages characteristic of a chamber drying plant have been retained. Moreover, such a chamber drying plant for brick loads has been provided in which exactly the desired drying formula can be followed accurately in a way advantageous in view of both the drying result and the energy consumption. For its part, the control method in accordance with the invention permits the reaching of the goals described above by means of a control equipment of simple construction and operation.
In the following, the invention will be described in detail with reference to one exemplifying embodiment of the invention, illustrated in the figures of the attached drawing, whereby the invention is by no means strictly confined to the details of the said embodiment.
FIG. 1 is a vertical sectional view of drying chambers in accordance with the invention on an enlarged scale.
FIG. 2 is a vertical sectional view of the first chamber of the drying channel in the direction opposite to that shown in FIG. 1.
FIG. 3 is a horizontal sectio
REFERENCES:
patent: 1783030 (1930-11-01), Worden
patent: 2547833 (1951-04-01), Parkes et al.
patent: 2758386 (1956-08-01), Cobb
patent: 2799096 (1957-07-01), Scott
patent: 4204337 (1980-05-01), Roos et al.
patent: 4251925 (1981-02-01), Muhsil et al.
Schwartz Larry I.
Tekma Oy
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