JPS6234640Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention forms a sludge drying chamber by a casing connected to a sludge supply path at one end and a dried sludge discharge path at the other end, and inside this sludge drying chamber, This invention relates to a sludge dryer equipped with a transfer screw device that also serves as sludge agitation.

Conventionally, the screw device of the sludge dryer was
As shown in FIG. 6, a spiral blade 18 mainly for sludge transfer and a paddle 19 mainly for sludge agitation were arranged side by side on a rotating shaft 20, but the structure was complicated and the number of parts was large. There were many problems, making it difficult to manufacture.

An object of the present invention is to provide a sludge dryer whose screw device is easy to manufacture and which has an extremely high sludge drying capacity.

The structural features of the present invention devised to achieve the object are as follows: a jacket is provided to cover the bottom and both side parts of the casing; The screw device is constructed by arranging a plurality of screws constituted by attached hollow linear spiral bodies in parallel with the spiral bodies of adjacent screws entering into their rotation loci, Connecting each of the support shaft and the linear spiral body to the high temperature flow pressure supply device on the dry sludge discharge path side,
The sludge supply path side is connected to the high-temperature fluid recovery pipe.

With the above characteristic configuration, the present invention provides the following effects. That is, according to the above-mentioned linear spiral, sludge can be mainly transferred by the part of the outer circumferential surface of the linear spiral that faces in the direction of the spiral rotation axis or in a direction close to it, and in the direction perpendicular to the rotation axis or close to it. Since sludge agitation can be mainly performed by the portion facing in the direction, especially the portion facing inside the spiral, a screw device having sufficient desired functions can be easily manufactured and the number of parts can be reduced. Moreover, the linear spiral body is hollow, and the high-temperature fluid, which is a heat source for drying sludge, is supplied not only to the rotating support shaft of the screw but also to the internal space of the linear spiral body, and serves as an active part for transfer and stirring. Since the sludge is directly heated in this part, it is easy to achieve uniform dryness. Furthermore, the linear spiral itself has a large surface area, the adjacent screws are actively placed close together so that the rotational trajectories of the spirals overlap with each other to increase the stirring ability, and the surroundings of the casing that forms the drying chamber The casing itself is heated by providing a jacket for supplying the high-temperature fluid, and the high-temperature fluid is made to flow from the dried sludge discharge path side to the sludge supply path side, so that the outlet side where the drying progresses is carried out. Due to the synergistic effect of increasing the temperature, a sludge dryer with extremely excellent sludge drying ability was obtained.

Next, examples will be shown.

As shown in FIGS. 1 and 2, a sludge drying chamber 3 is formed by a casing 2 equipped with a jacket 1 covering the bottom and both side portions, and a sludge supply channel 4 is provided at one end of the drying chamber 3. and a dry sludge discharge channel 5 on the other end side.
The three screws A ₁ , A ₂ , A ₃ are arranged side by side in the drying chamber 3 on the left and right, and the adjacent screws A ₁ , A ₂ and A ₂ , A ₃ are connected to each other. The gears are formed so as to have reverse twists at approximately equal pitches, and are arranged so as to be inserted into each other, and the reduction gear 6 which is linked to the motor M ₁ is attached to the screws A ₁ and A ₃ at both ends by a chain 7. The screw A ₁ at one end is interlocked with the screw A ₂ in the center by a reversing gear 8, so that the adjacent screws A ₁ , A ₂ and A ₂ , A ₃ are rotated almost equally. The sludge is rotated at a high speed in the opposite direction, and the sludge from the supply path 4 is agitated and transferred toward the discharge path 5 by the screws A ₁ , A ₂ , and A ₃ .

To form the screws A ₁ , A ₂ , A ₃ , as shown in FIGS. 3 and 4, a large-diameter pipe 9 and a small-diameter pipe 10 are arranged substantially concentrically with each other, and a small-diameter pipe 10 is formed in a spiral shape. Both ends of the small-diameter pipe 10 are connected by a connecting fitting 11 and connected by a hole 12, so that the entire outer peripheral surface of the small-diameter pipe 10 is exposed.

As shown in FIG. 1, a device 14 for supplying high temperature fluid such as steam or oil is connected to the jacket 1 of the casing 2 through a supply pipe 15a and a recovery pipe 16a, and a supply pipe 15 is connected to the large diameter pipe 9.
b, the collection pipe 16b is connected by a rotary joint 17, and the jacket flows from the discharge passage 5 toward the supply passage 4 while stirring and transferring the sludge from the supply passage 4 toward the discharge passage 5; 1
The structure is such that heating and drying is carried out by the high temperature fluid in both pipes 9 and 10.

Next, another example will be shown.

To form screws A ₁ , A ₂ , A ₃ , both pipes 9 and 10 are connected to a plate-like spiral 13 as shown in FIG.
Alternatively, the connecting members for both the pipes 9 and 10 may be provided intermittently along the small diameter pipe 10.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention,
Fig. 1 is a partially cutaway plan view, Fig. 2 is a partially cutaway side view, Fig. 3 is an enlarged view of the main part, and Fig. 4 is the same as Fig. 3.
FIG. FIG. 5 is a perspective view of essential parts showing another embodiment of the present invention. FIG. 6 is a front view of the main parts of the conventional example. 10... Linear spiral body, 1... Jacket, 2...
...Casing, 3...Drying chamber, 4...Sludge supply path, 5...Dried sludge discharge path, 9...Rotating shaft, 1
4... High temperature fluid supply device, 16a, 16b...
High-temperature fluid recovery pipe, A ₁ ...screw.

Claims (1)

[Scope of utility model registration request] A casing 2 with a sludge supply path 4 connected to one end and a dried sludge discharge path 5 connected to the other end.
In this sludge dryer, a sludge drying chamber 3 is formed, and in this sludge drying chamber 3, a transfer screw device that also serves as sludge agitation is installed. A covering jacket 1 is provided, a hollow rotational support shaft 9, and a hollow linear spiral body 10 attached at least at both ends to the rotational support shaft 9.
The screw device is constructed by arranging a plurality of screws A ₁ in parallel with each other in such a manner that the spiral bodies 10 of the adjacent screws A ₁ are mutually inserted into their rotation loci, and these screws A 1 and The support shaft 9 and the linear spiral body 10 are connected to the high temperature fluid pressure supply device 14 on the dry sludge discharge path 5 side, and high temperature fluid recovery pipes 16a, 16b are connected on the sludge supply path 4 side. A sludge dryer characterized by being connected to each.