JPS643978Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for efficiently preheating granular materials using hot gas.

[Conventional technology]

Conventionally, a preheating device has been proposed in which a moving layer is formed by filling a space between two louvers with granules, and a plurality of moving layers are arranged in parallel within a heat exchanger main body.

Further, in Japanese Utility Model Publication No. 35-33569, a double cylinder body 2 forming a porous wall is arranged vertically within a tower frame 1,
A blower 17 is installed at the material entrance 11 for the material (for example, feed) passage 5 formed between these cylinders 2.
is a vertical type, in which an air exhaust fan 22 is disposed at the material exit 12, and a hot air passage is provided in which the material moves downward under its own weight in the passage several times and goes upward in a meandering manner. A dryer is listed.

[Problem that the invention attempts to solve]

In the preheating device described above in which a moving layer is formed by filling the space between the two louvers, (1) the heat exchanger body is rectangular or box-shaped, resulting in uneven flow of hot gas;
Installation space becomes larger. (2) The heat exchange rate is low because the hot gas and the granular material to be preheated come into contact only once. (3) Since it is not unified, it is necessary to design it each time. (4) Since the falling distance of the granular material to be preheated is not constant, the temperature after preheating varies. There are other inconveniences.

Further, the dryer described in the above-mentioned Japanese Utility Model Publication No. 35-33569 has the advantage that the hot gas and the object to be heated come into contact with each other several times.
is provided outside the dryer and connected to the dryer via the hot air supply pipe 16, so there is heat radiation loss from the hot air supply pipe (duct) 16 and the furnace body, and it is difficult to downsize and increase the capacity. The problem is that it is difficult to take appropriate measures.

In addition, since the workpiece extracting portion is concentrated in one place, there may be a case where a drift occurs in the workpiece and it is difficult to extract the workpiece.

Furthermore, since the shielding plates 7, 8, and 10 are horizontal,
There are inconveniences such as the objects to be processed spilling from the support (double cylinder) remaining piled up.

The present invention was developed to solve the above-mentioned problems, and by incorporating a hot gas generator into the main body, making the partition plate an inclined shape, and providing multiple outlets for granular preheated material, it is possible to It eliminates heat radiation loss from the gas generator, making it easier to downsize and handle large capacity.
Another object of the present invention is to provide a preheating device for granular materials that reduces drifting flow when the material to be processed is taken out and allows the material to be processed spilled from the support to return into the layer.

[Means for solving problems]

In order to achieve the above object, the granular material preheating device of the present invention has a granular material inlet 2 at the upper end, a granular preheating material outlet 3 at the lower end, as shown in the drawings,
Cylindrical body 1 with a cold waste gas outlet 4 in the upper part
a cylindrical louver 10 having a gap 8 therein;
11 are arranged in a double manner in the longitudinal direction, and the cylindrical louvers are filled with granular materials 12 as objects to be preheated to form a granular material moving layer 13. In a particulate material moving bed type preheating device having a particulate material hopper 14 connected to the upper end, a hot gas generator 7 is installed in the lower central part of the cylindrical body 1, and a particulate material moving layer 13 is installed above the hot gas generating device 7. , 13, inclined partition plates 15 and 16 are arranged alternately between the particulate material movement layer 13 and the cylindrical body 1 below the low-temperature waste gas outlet 4, and a plurality of particulate preheated material outlets 3 at the lower end are arranged. It is characterized by the fact that it is individually arranged.

[Effect]

The granular material to be preheated is introduced from the granular material inlet 2 and passed through the double cylindrical louvers 10 and 11 at a constant speed.
During this time, the hot gas generated from the hot gas generator 7 flows through the particulate matter moving layer 13 multiple times to efficiently preheat the particulate matter. The preheated granular material is smoothly taken out from the plurality of granular preheated material outlets 3 without causing drift. In addition, the partition plate 15,1
Since the partition plate is inclined, the particulate matter spilled onto the particulate matter movement layer 13 naturally returns between the louvers. Note that since a louver is used as the support, the opening will not become clogged.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. 1 is a cylindrical body covered with a heat insulating material, and this cylindrical body 1 has a granular material inlet 2 at the upper end, and a plurality of granular preheated material outlets 3 (four as an example in the drawing) at the lower end, It has a low-temperature waste gas outlet 4 in the upper part, and a hot gas generator 7 consisting of a burner 5 and a combustion chamber 6 in the lower central part. A cylindrical louver 1 is arranged so as to have a gap 8 in this cylindrical body 1.
0 and 11 are arranged in a double manner in the longitudinal direction, and the cylindrical louvers 10 and 11 are filled with granular materials 12 as objects to be preheated to form a granular material moving layer 13.
A particulate matter hopper 14 is connected to the upper end of the particulate matter moving layer 13 within the chamber. Further, at least between the particulate matter transfer layer 13 above the hot gas generator 7 and the particulate matter transfer layer 13 below the low temperature waste gas outlet 4.
and a slanted partition plate 15,1 between the cylindrical body 1 and the cylindrical body 1.
6 are arranged alternately. Although FIG. 1 shows a case where the partition plates are provided in two stages, it is also possible to provide three or more stages. The lower part of the cylindrical particulate matter moving layer 13 has a plurality of parts (in the drawing, as an example, there are four parts).
This bulging part 17 is connected to the granular preheated material outlet 3. 18 is a waste gas duct.

In the granular material preheating device of the present invention configured as described above, the molten phosphorus fertilizer raw material, electric furnace raw material, open hearth raw material, and other granular mining and industrial raw materials inputted from the granular material inlet 2 are kept constant. During this time, the hot gas generated from the hot gas generator 7 flows through the particulate matter moving layer 13 multiple times in the direction shown by the arrow to efficiently move the particulates. Preheat.

[Effect of idea]

Since the present invention is configured as described above, it has the following effects.

(1) Since the hot gas generator and heat exchanger are integrated, there is no intermediate duct and there is little heat radiation loss.
In addition, the entire device can be made compact,
It is advantageous for installation.

(2) Since it is unitized, it is easy to scale up. In other words, it is easy to handle large capacity.

(3) Since there are multiple outlets for the granular preheated material, there is less drifting of the preheated material and it can be smoothly extracted.

(4) Since the partition plate has an inclined shape, the material to be preheated spilled from the louver can be naturally returned to the particulate matter movement layer.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional explanatory diagram showing an embodiment of the granular material preheating device of the present invention, and FIG.
- A sectional view, and FIG. 3 is a BB sectional view in FIG. 1. 1... Cylindrical main body, 2... Particulate matter inlet, 3...
Granular preheated material outlet, 4... Low temperature waste gas outlet, 5...
Burner, 6... Combustion chamber, 7... Hot gas generator,
8... Gap, 10, 11... Cylindrical louver, 12
... Granular material, 13... Granular material moving layer, 14... Granular material hopper, 15, 16... Slanted partition plate, 1
7...Bulging part, 18...Waste gas duct.

Claims (1)

[Scope of utility model registration request] Cylindrical louvers 10, 11 are provided with a gap 8 in a cylindrical body 1 having a granulate inlet 2 at the upper end, a granular preheat outlet 3 at the lower end, and a cold waste gas outlet 4 at the upper side. are arranged in a double manner in the longitudinal direction, and the cylindrical louvers are filled with granular materials 12, which are objects to be preheated, to form a granular material moving layer 13.
In a particulate matter moving bed type preheating device in which a particulate matter moving bed hopper 14 is connected to the upper end of a particulate matter moving bed 13 in a cylindrical body 1, a hot gas generating device 7 is incorporated in the lower central part of the cylindrical body 1. Slanted partition plates 15 and 16 are alternately arranged between the particulate matter transfer layers 13 and 13 on the upper side and between the particulate matter transfer layer 13 and the cylindrical body 1 below the low-temperature waste gas outlet 4. A granular material preheating device characterized in that a plurality of granular preheating material outlets 3 are provided.