JPS5844000Y2 - Reversing stalker - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an inverted stoker for drying water-containing substances such as dehydrated sludge.

Conventionally, a drying apparatus as shown in FIG. 1, for example, has been used to dry dehydrated sludge and the like.

In the figure, reference numeral 1 indicates a reversing stoker, and a plurality of reversing stokers are installed in a vertical drying furnace 2, for example, in a staggered manner.

In this state, each reversing stoker 1 can be inverted 90 degrees inward about the shaft 3.

Therefore, for example, dehydrated sludge charged from the hopper 4 is first placed on the uppermost reversing stoker, and then transferred to the reversing stoker located one step below by reversing the sludge.

These reversing operations are continued until reaching the lowest reversing stalker.

During this process, the sludge deposited on the reversing stoker has its front and back sides exchanged, and is effectively dried while being reduced to fine particles.

Once dried to the point where it can catch fire, it is then transferred to the incineration process.

In this case, the hot air for drying ascends around each inverted stoker 1 from below to above.

However, with this configuration, the thermal efficiency was poor because the hot air only touched the surface of the sludge on each inverting stoker, and in order to improve the drying effect, it was necessary to use a considerably multi-stage inverting stoker. .

This idea was made to eliminate these drawbacks. Focusing on the fact that the material to be dried on the reversing stoker is granulated, the reversing stoker itself is given a hot air supply function to significantly improve thermal efficiency. The object of the present invention is to provide a reversing stoker for a drying device with improved performance.

Hereinafter, one embodiment of this invention will be described in detail with reference to FIGS. 2 to 5.

First, in FIG. 2, reference numeral 5 denotes a box-shaped main body constituting the reverse slip force, and has, for example, a semicircular cross section.

A plurality of hot air discharge holes 6 are formed on the upper surface of the main body 5, so that the hot air supplied from either end of the hollow shaft 3 is discharged upward at an appropriate speed.

The diameter, number, and discharge pressure of the hot air discharge holes 6 can be modified in various ways, such as, for example, the upper part has a larger diameter, the number (smaller), and the discharge pressure (higher), and the lower part has the opposite. be.

This is effective because drying can be done in accordance with the particle size.

In this case, the shape of the opening is not limited to the straight one shown in FIG. 3, but may be as shown in FIG. 4.

As shown in the figure, three guide plates 5a to 5C of appropriate height are formed on the sides of the upper surface of the main body 5 except for the inner side.

Therefore, the dehydrated sludge deposited on the upper surface of the main body 5 can be prevented from burning.

According to the above configuration, hot air can be passed through the dehydrated sludge deposited on the upper surface of the inversion stoker 1 not only on the surface but also inside the dehydrated sludge while the dehydrated sludge remains in the deposited state.

Moreover, in this case, the dehydrated sludge in the piled state is crushed and granulated by the reversing effect of each reversing stoker, so the overall surface area is large and the aeration effect is good.
Thermal efficiency and drying efficiency are greatly improved.

Furthermore, since the discharge surface is wide, the dehydrated sludge that has been buried is evenly aerated evenly.

In FIG. 5, a granulator 7 is provided in the hopper section of the drying oven 2, and the granules are granulated from the upper part, thereby further improving thermal efficiency and realizing a sealing function within the drying oven.

As described above, according to this invention, the reversing stoker itself has a hot air supply function, and the material to be dried deposited on the reversing stoker is distributed not only from the surface as in the conventional method but also from the center. It is evenly ventilated and dried.

Therefore, the thermal efficiency is much higher than that of the conventional reversing stoker, and low-temperature waste gas can be utilized.

Furthermore, since the drying effect is uniform and the drying state is even, the incineration efficiency is also improved.

Note that the arrangement of the reversing stokers in the drying device is not limited to the staggered arrangement as in the conventional example described above, and various arrangements are possible.

Further, the hot air supply section is formed by a plurality of holes over the entire upper surface of the reversing stoker.

Therefore, when the drying material is turned over, the hole portion acts to catch the bottom of the material to be dried and prevents it from sliding downward, which also has the advantage of enhancing the mixing and agitation effect.

In the above description, the case where the material to be dried is dehydrated sludge has been described, but the object is not limited to dehydrated sludge, but can be applied to various materials such as scum and garbage.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a drying device using a conventional reversing stoker, Fig. 2 is a perspective view of an inverting stoker according to an embodiment of the present invention, Fig. 3 is a sectional view of the essential parts, and Fig. 4 5 is a cross-sectional view of a modified example of the hot air discharge hole portion, and FIG. 5 is a longitudinal cross-sectional view of another modified example in which a granulator is attached to the input portion. 1...Reverse stoker, 2...Drying oven,
3...Hollow shaft, 4...Hopper, 5...
...Main body, 6...Hot air discharge hole, 7...
... Granulation machine.

Claims (2)

[Scope of utility model registration request] (1) An inverted stoker body having a hollow interior, a plurality of hot air discharge holes formed in the upper surface of this inverted stoker body, and a plurality of hot air discharge holes formed in the upper surface of the inverted stoker body; In order to discharge hot air from the discharge hole,
A reversing stoker comprising at least one hollow shaft provided at an end of the reversing stoker body. (2) The reversing stoker according to claim 1, which is a registered utility model, wherein a guide plate is provided on the upper surface of the reversing stoker main body, excluding the side where the dried material falls, to prevent the material to be dried from falling off.