JPS628000Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is connected to the outlet end of a rotary kiln,
The present invention relates to a multi-cylinder cooling device for a rotary kiln, in which a plurality of cooling cylinders extending parallel to the axis of the rotary kiln are integrally arranged in a planetary manner near the outlet end.

Referring to FIG. 1, conventional multi-tube cooling devices for rotary kilns have been used, for example, in cement plants. The clinker fired in the rotary kiln 1 falls into the cooling cylinder 4 from the outlet hole 3 formed at the outlet end 2 of the rotary kiln 1, and the material inside each cooling cylinder 4 that rotates integrally with the rotary kiln 1 is released. Move toward the discharge housing 5. On the other hand, the air introduced into the material discharge housing 5 is
The clinker is cooled and preheated through countercurrent contact with the clinker, introduced into the rotary kiln 1 through the outlet hole 3, and supplied as combustion air to the burner 6.

In such a conventional multi-tube cooling system, air flows above the clinker moving in the lower part of the cooling tube 4, so the contact area between the clinker and the air is relatively small, resulting in poor cooling efficiency. . Therefore, when the throughput becomes large, it is necessary to increase the size of the cooling cylinder 4. When the cooling cylinder 4 becomes large in size in this way, an excessive load acts on the support cylinder 7, and the support cylinder 7
had to be increased in size, the amount of deformation of the cooling cylinder 4 due to thermal expansion became large, and the support structure for the cooling cylinder 4 became difficult.

This invention solves the above-mentioned technical problems and proposes a multi-tube cooling system for rotary kilns that can increase throughput without increasing the size of the cooling cylinder by improving cooling efficiency. The purpose is to

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a partially cutaway perspective view of an embodiment of the present invention, and FIG. 3 is a longitudinal sectional view of FIG. 2. The clinker burned in the rotary kiln 10 by the combustion heat of the burner 15 falls into the cooling cylinder 13 from the outlet hole 12 at the outlet end 11, and flows through the cooling cylinder 13 which rotates integrally with the rotary kiln 10. Move toward the right in Figure 2. On the other hand, each cooling cylinder 1
Air is introduced into the chamber 3 as indicated by the arrow 14, and comes into countercurrent contact with the clinker. Therefore, the clinker is cooled and discharged, and the heated air is introduced into the rotary kiln 10 through the outlet hole 12 and used as combustion air for the burner 15.

The outlet hole 12 is located at the outlet end 1 of the rotary kiln 10.
A plurality of, for example, eight, are formed on the peripheral wall of No. 1 at equal intervals in the circumferential direction. Each outlet hole 12 has
One end of each cooling cylinder 13 is connected via the chute 16 . Each cooling cylinder 13 is a rotary kiln 10.
The support tube 17 is arranged in a planetary manner around a support tube 17 which is concentrically and integrally connected to the outlet end 11 of the tube and is integrally surrounded by the support tube 17 by a support member 24 .
Note that the axis of each cooling cylinder 13 corresponds to the rotary kiln 10.
is parallel to the axis of

Referring to FIG. 4, according to the present invention, a first weir plate 18 and a second weir plate 19 are fixed at an interval in the axial direction midway inside each cooling cylinder 13. The first dam plate 18 is fixed to the inner surface of the cooling cylinder 13 over an angular range greater than 180 degrees. Over the remaining angle range, the inner surface of the cooling tube 13 and the first
A circulation space 20 is formed between the weir plate 18 and the weir plate 18 .
A plurality of communication holes 21 are formed in the central portion of the first weir plate 18 near the axis of the cooling cylinder 13 to block the flow of clinker but allow the flow of air. The second weir plate 19 has the same shape as the first weir plate 18 and includes a plurality of communication holes 22. This second weir plate 1
9 is a position spaced apart from the first weir plate 18 along the axis of the cooling cylinder 18, and is attached to the inner surface of the cooling cylinder 13 over an angular range opposite to that of the first weir plate 18 with respect to the axis of the cooling cylinder 13. Fixed. A circulation space 23 is formed in the remaining angular range of the second dam plate 19. Note that the first and second weir plates 18 and 19 are
It may be made to incline toward the rotary kiln 10 as shown in the figure as it goes radially outward of the rotary kiln 7.

In such a multi-cylinder cooling device, the cooling cylinder 13
As shown in FIG. 51, FIG. 52, FIG. 53, and FIG. 54, the clinker that has moved inside is trapped between the first weir plate 18 and the second weir plate 19 regardless of the rotational position. stay. Moreover, since the flow holes 21 and 22 are formed in both the weir plates 18 and 19, the air that has passed through the flow holes 22 passes through the accumulated clinker, and is further circulated. It flows through the hole 21 to the rotary kiln 10. Therefore, the accumulated clinker and air come into sufficient contact, and the residence time of the clinker becomes long.
Cooling efficiency is improved and it becomes possible to downsize the cooling tube 13.

Note that a plurality of sets of the first weir plate 18 and the second weir plate 19 may be provided along the axial direction of each cooling cylinder 13.

As described above, according to the present invention, the granular material stays and is cooled between the first weir plate and the second weir plate in the middle of each cooling cylinder, so the cooling efficiency is improved, and the cooling efficiency is improved. It is possible to downsize the cylinder.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the prior art, Fig. 2 is a partially cutaway perspective view of an embodiment of the present invention, and Fig. 3 is a sectional view showing the conventional technology.
4 is a cutaway perspective view showing the inside of the cooling cylinder 13, and FIG. 5 is a longitudinal sectional view of the first and second weir plates 1.
8 and 19. FIG. 10...Rotary kiln, 11...Outlet end, 1
2... Outlet hole, 13... Cooling tube, 17... Support tube, 18... First weir plate, 19... Second weir plate, 2
1, 22... Distribution hole.

Claims (1)

[Scope of utility model registration request] A rotary kiln in which a plurality of cooling cylinders connected to the outlet end of the rotary kiln and extending parallel to the axis of the rotary kiln are integrally supported in a planetary manner by a support cylinder concentrically and integrally connected to the rotary kiln. In a multi-tube cooling system for a kiln, there are a plurality of communication holes in the middle of each cooling tube, which are fixed to the inner surface of the cooling tube over an angular range greater than 180 degrees, and are located in the center of the cooling tube near the axis. The first weir plate has the same shape as the first weir plate and is spaced apart from the first weir plate along the axis of the cooling cylinder with respect to the axis of the cooling cylinder. A multi-tube cooling device for a rotary kiln, characterized in that a second weir plate is fixed to the inner surface of the cooling tube over the opposite angular range.