JPS5933279Y2 - Fluidized bed roasting equipment for powder and granules - Google Patents

Description

[Detailed description of the invention] The present invention is a powder storage device equipped with a roasting container that stores powder and granules such as grains, introduces hot air into the interior to form a fluidized bed of the powder, and roasts the powder and liquid. This invention relates to a granular roasting device.

Conventionally, this type of apparatus is equipped with roasting containers (two cylinders in the figure) 1A and IB in the bottom section, as shown in FIGS. After weighing, the feed chute 4 alternately supplies the roasting containers IA and IB.

On the one-person side of the roasting vessel to which the powder and granules have been supplied, the powder and granules supply valve 6 is opened while the hot air cutoff valve 5 is closed, and the powder and granules 7 are
After the powder is stored on the perforated plate 8 in the roasting container, the powder supply valve 6 is closed.

Next, the hot air cutoff valve 5 is opened, and hot air is also introduced into the housing 10 through the line 11 with the powder discharge valve 9A closed.

This hot air flows into the roasting container for one person through the perforated plate 8,
The granular material in the roasting container 1A is fluidized into a fluidized bed, and the granular material is fluidized and roasted, and is also discharged to the outside of the line 12.

After roasting the powder, the hot air cutoff valve 5 is closed, the perforated plate 8 and the powder discharge valve 9A are opened, and the roasted powder is discharged from the line 13 to the outside of the yarn.

This operation is repeated alternately for each roasting container.

In such conventional torrefaction equipment, (1) the maximum amount of powder and granules supplied to the cylindrical torrefaction container is limited in order to form a uniform fluidized bed within the container; (2) the torrefaction The hot air required to perform this is controlled to a cylinder wind velocity of 6 m/s or less so that the powder particles are not scattered from the roasting container.

As a result, the conventional roasting apparatus has the drawback that the amount of powder and granular material through which it can be processed is limited relative to the diameter of the roasting container.

An object of the present invention is to provide a fluidized bed roasting apparatus for powder and granular material that can eliminate the drawbacks of the above-mentioned prior art and increase the throughput of powder and granular material relative to the cylindrical diameter of the roasting container.

The present invention focuses on the fact that it is possible to efficiently form a fluidized bed of powder and granular materials using only vertically flowing hot air, and has the following features: As a result of our study, we decided to increase the amount of powder and granules supplied by introducing a vertical flow of hot air into the powder and granules stored in the roasting container, and at the same time introducing the hot air to forcibly generate a swirling flow of the powder and granules. This is to efficiently and uniformly form a fluidized bed of powder and granular material.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

The difference in FIG. 3 from the conventional example shown in FIG. 2 is that a large number of nozzles 14 are attached to a portion of the side wall of the roasting container surrounded by the housing 10.

Therefore, in FIGS. 2 and 3, the same parts are designated by the same reference numerals.

As shown in FIG. 4, each nozzle 14 is located on the side wall of the roasting container 1A, and is concentric with the circle formed by this side wall.
In addition, the hole is drilled tangentially to the small diameter circle.

In this type of powder and granular roasting apparatus, the powder and granules are stored in one roasting container, and hot air is introduced into the housing 10 by opening the hot air cutoff valve 5, unlike the conventional method. It's the same.

Here, the hot air introduced into the housing 10 is introduced into the roasting container 1A through the perforated plate 8 as a vertical flow, and the hot air introduced into the roasting container 1A through the many nozzles 14 is roasted. It swirls in a whirlpool inside the baking container.

The operation for discharging the roasted powder and granules is the same as before.

Next, the inner diameter of the roasting container (cylindrical) was set to 500 r for the conventional apparatus shown in Figs. 1 and 2 and the apparatus of this embodiment.
The processing capacity was compared when rrlnφ.

In this example, the diameter is 2rrr! ILφ nozzle 1
2498 nozzles 14 are provided, and the amount of hot air blown from these nozzles 14 has a pressure difference of 100 myynAj, as shown in FIG. (
Housing internal pressure - roasting container internal pressure) 27.3/mi
It is n.

As is clear from Table 1, in this example, the amount of hot air per cylinder was increased, the amount of powder and granular material supplied per cylinder was increased, and the processing capacity was improved by 123% compared to the conventional device. L・ru.

In this invention, since the empty cylinder velocity tends to increase compared to conventional equipment, the powder and granules are placed in the upper part of the roasting vessel to prevent the powder from scattering from the roasting capacity. A net can also be erected to prevent scattering.

Furthermore, in the above embodiment, the nozzles for generating the vortex flow of the powder and granular material are installed on the side wall of the roasting container inside the housing, but many nozzles are also installed on the side wall of the roasting container 1 in the lower part of the roasting container 1 and above the housing. It is also possible to provide a nozzle and introduce hot air into this nozzle.

As described above, according to the present invention, by introducing horizontal hot air into the roasting container at the same time as vertical hot air, the powder fluid is forcibly swirled and a vortex is generated.
Therefore, the throughput of powder and granular material increases relative to the size of the container, and it is possible to downsize the apparatus for a constant throughput of powder and granular material.

[Brief explanation of the drawing]

Fig. 1 is an overall system diagram of a conventional powder roasting device, Fig. 2 is an explanatory diagram of the main parts of Fig. 1, Fig. 3 is an explanatory diagram of the main parts showing an example of the present invention, and Fig. 4 is an explanatory diagram of the main parts of Fig. 1. A cross-sectional view taken along line A-A in FIG. 3,
FIG. 5 is a diagram showing the amount of increase in hot air according to the present invention. IA, IB... Roasting container, 3... Weighing machine, 4... Reconnaissance chute, 5... Hot air cutoff valve, 6... - Powder supply valve, 8... Porous plate, 9A, 9B... Powder discharge valve, 10...
...Housing, 14...Nozzle.

Claims (1)

[Scope of utility model registration request] A fluidized bed roasting apparatus for powder and granules is equipped with a roasting container that stores powder and granules, introduces hot air into the interior to form a fluidized bed of powder and granules, and roasts the powder and granules. A perforated plate for introducing hot air is provided at the bottom of the roasting container, and a number of nozzles are provided on the side of the roasting container for introducing hot air from this side to generate a swirling swirl along the wall surface of the container. A fluidized bed torrefaction device for powder and granular materials characterized by the following.