JPS6019436B2 - Cooling device for high temperature powder and granular materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packed bed type cooling device for cooling high temperature powder such as cement clinker.

As a cooling device for high-temperature powder and granular materials, packed bed coolers have long been known for their excellent heat exchange efficiency. It is difficult to distribute the cooling air evenly, resulting in uneven cooling and uneven cooling.

In order to prevent this, measures have been taken, for example, to increase the vertical length of the cooler body, but maximizing the cooler body is not a desirable method.
The present invention was made in order to take advantage of the advantages of the conventional packed bed cooler and eliminate the disadvantages. Namely, it does not require maximizing the cooler body and prevents the cooling air from drifting, thereby reducing the amount of high-temperature powder particles. The object of the present invention is to provide a packed layer type cooling device that can uniformly cool a body.

For this reason, the configuration of the present invention is such that the axial center of the packed layer cooler main body is appropriately inclined with respect to the vertical line, and the cooler main body is provided so as to be rotatable about the center. It is characterized by

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a rotary kiln for firing cement; 2 is a rotary kiln for firing cement;
3 is a kiln burner, 3 is a kiln hood provided on the cement clinker outlet side of the kiln, and 4 is a fluidized bed cooler as a primary cooler for rapidly cooling the cement clinker, which is a high-temperature powder from the kiln.

The cooler 4 is provided with a crusher 5, an upper cooling air blowing pine 6, a lower cooling air blowing pipe 7, and the like. Reference numeral 8 denotes an air duct provided in a part of the kiln hood 3, and is a duct for supplying cooler exhaust air, which will be described later, as secondary air for combustion of a false dawn furnace (not shown).

In the figure, a is a filled-layer cooler as a secondary cooler, and the main body of this cooler a, the filled-layer cooler main body 9, is located below the yuzu air duct 8, and the center b of the cooler main body is is an angle of 8 (20 to 30
degree), and as shown by arrow d,
It is provided so as to be rotatable around the center b. That is, a ring gear 10 that meshes with a rotary drive pinion (not shown) is fixed to the outer periphery of the cooler main body 9, and an annular tire 11 is fixed below this gear 10. 12 is a lower support roller that receives the downward load of the cooler main body 9; 13 is a side support roller that receives the lateral load of the cooler main body 9; these rollers 12 and 13 are in contact with the tire 11'; , although not shown, is rotatably supported by each wisteria support fixed to a pedestal or the like.

Reference numeral 14 denotes a central cooling air introduction pipe, which is connected to a stationary side air pipe 17 via a rotor coupling 15 and a flexible pipe 16.

Reference numeral 18 denotes cooling air blowing pipes, which are open at the bottom and are arranged radially in large numbers with respect to the axis b, and each of them is fitted with the cooling air introduction pipe 14 at the center.

A number of chute pipes 19 are provided below from the bottom of the cooler main body 9, and each of the pipes 19 has a lower end closed portion connected to an annular table 20 (in this embodiment, an inner table 20 and an outer table 20). The cooled granular material is scraped out by a scraping plate 21.

Additionally, 22 is a bread conveyor. In the high-temperature granular cooling device configured as shown in the figure, cement clinker, which is a high-temperature granular material, from the rotary kiln 1 is first rapidly cooled in a fluidized bed cooler 4, which is a primary cooler. A large lump is processed in the cooler 4, and the rest is cooled again in a packed bed cooler a, which is a secondary cooler.

That is, the fluidized bed type cooler 4 consists of an upper overflow type fluidized bed and a lower packed bed, and the packed bed is pulled out at a rising wind velocity that is high enough to pull out the bulge that sinks to the bottom of the fluidized bed, and is crushed by the crusher 5. By doing so, the clinker can be rapidly cooled and the clinker containing no large lumps can be supplied to the subsequent packed bed type cooler main body 9. Also, in the lower filling layer, a small amount of clinker (for example, 0.1
Since the k9) is cooled by the majority of the kiln air, adverse effects such as drifting can be considerably covered. Next, in the packed layer cooler a, the main body 9 rotates around the bag center b which is inclined at an angle 8 with respect to the vertical line c, as shown by the arrow d. The clinker fed into the main body 9 is uniformly cooled while forming a packed layer, and is taken out using a number of chute pipes 19 uniformly attached to the bottom plate of the main body 9.
After that, two tables are assembled and scraped out using the scraping board 21.

That is, if the inner diameter of the main body 9 is D, and if we focus on the leftmost point on the inner surface of the side wall of the main body 9, when the Hagi main body 9 rotates 180 degrees at the central angle seen from the axis b, that one point becomes the rightmost point. However, since the axis b is inclined by an angle of 8 with respect to the vertical line c, at its rightmost position, it appears to have moved upward by D sin 8, and when further rotated from 180 degrees to 360 degrees, the original However, during this time, it seems to have moved downward by Dsin8, and this is repeated every rotation, so that the clinker fed into the upper part of the main body 9 also has the relationship between the rotation and the angle of repose. The cooling air is distributed almost on a flat surface with almost no segregation, and there is no uneven flow of cooling air, resulting in uniform cooling. Furthermore, even with respect to one discharge point, the flow range becomes wider due to the effect of rotation, and uniform discharge becomes possible. As described above, the present invention is directed to a packed bed type cooler that introduces high-temperature powder and granules from above, cools them while forming a packed layer, and discharges the cooled powder and granules from the bottom. Since the center of the cooler body is appropriately inclined with respect to the vertical line, and the cooler main body is provided so as to be rotatable around the center, the slanted rotational action and powder particles are In relation to the angle of repose, it becomes a filled layer with a uniform distribution,
This prevents uneven flow of cooling air and ensures uniform cooling.

Therefore, there is no need to maximize the cooler body.

[Brief explanation of the drawing]

The figure is an elevational view, partially in section, of an embodiment of the invention. a...Filled layer type cooler, b...Mari-center of the cooler body, c...
- Vertical line, d... Arrow indicating rotation direction, o... Oblique angle, 4... Fluidized bed cooler, 9... Filled bed cooler body, 10... Ring gear, 11 ...Tire, 12
, 13...Support roller, 14...Central cooling air introduction pipe, 15...Rotary coupling, 16...Flexible pipe, 17...Fixed side air pipe, 18...Cooling air blowing pipe, 19...Chute pipe, 20... table, 21... scraping board.

Claims (1)

[Claims] 1. In a packed bed cooler that introduces high-temperature powder from above, cools it while forming a packed layer, and discharges the cooled powder from the bottom, the axis of the packed bed cooler body is aligned with the vertical line. 1. A cooling device for high-temperature powder or granular material, characterized in that the cooler main body is provided so as to be freely rotatable about the axis.