JPS61283365A - Cyclone separator - Google Patents

Abstract

PURPOSE:To perform collection and classification by separating a particulate material into two or more kinds of particulate groups on the basis of a particle size or specific gravity, by connecting a second cyclone having an opening at the revolving body part of a cyclone. CONSTITUTION:A gas stream accompanied by a particulate material is introduced into a main body 10 through an inlet duct 6 and coarse particles having large mass are discharged to a pocket part 24 from the opening part 1a provided to a cylindrical part 1 and fallen to be gathered to the second particulate material take-out port 26 provided to the lower part of said pocket part 24 and subsequently discharged from a chute 27. A fine powder group having small mass is gathered to the lower part of an inverted conical part 2 by the centrifugal force of the main body 10 to be discharged from a first particulate material take-out port 3 through a chute 15. The gas stream, from which the particulate material was separated, rises through the central part of the main body 10 to be discharged through a first discharge duct 5.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to cyclone separators, in particular for example:
The present invention relates to a cyclone separator useful in the work process of separating and collecting powder and granular materials into coarse powder and fine powder, or into those with heavy specific gravity and those with light specific gravity, and to collect them.

BACKGROUND OF THE INVENTION Conventionally, this type of cyclone separator, for example, as shown in FIG. 5, has been known.

Such a cyclone separation M device C can separate and collect solid particles such as particles and mist contained in a fluid using the centrifugal force caused by swirling the fluid, classify them based on differences in particle size and specific gravity, and further ,
During this time, heat exchange is performed between the solid and the fluid, and it is used as a single device or as a composite device depending on the application.
It is used in calcining equipment for raw material powders such as pentacite powder.

As shown in FIG. 5, this type of conventional cyclone separator C has an inverted cone section 2 integrally formed on the lower side of a cylindrical section 1 with a cross-sectional area that gradually decreases downward. A solid foreign matter outlet 3 (first powder outlet) is provided at the lower end. A top plate 4 is attached to the top of the cylindrical part 1, and a discharge duct 5 is installed in the center of the top plate 4.
is connected. Note that the lower end portion of the duct 5 is provided so as to protrude inside the cylindrical portion 1. In addition, the cylindrical part 1
An inlet duct 6 is connected to the upper side thereof in the circumferential direction or tangential direction through a first opening (not shown), and from this inlet duct 6, powder and granular materials to be separated or classified are passed along with the fluid. be introduced.

Therefore, the cyclone separator C configured in this way
In this case, the multiphase flow consisting of powder and fluid flows through the discharge duct 5.
and the cylindrical part 1, and this swirling flow 8 sequentially descends and reverses near the bottom of the inverted conical part 2. The reversed swirling flow 8 forms a central flow 9 and rises, flowing into the discharge duct. It is taken out through 5.

In this case, the powder and granules are separated or classified by the centrifugal force caused by the swirling flow 8, spirally flow down along the inner walls of the cylindrical portion 1 and the conical portion 2, and are discharged from the outlet 3.

By the way, as mentioned above, the conventional cyclone separator C is
The structure has one inlet (inlet duct 6) and one outlet for separation.

Problems with the prior art Therefore, in such a conventional cyclone separator,
Structurally, it consists of only one separation chamber and one collected material outlet, and it is not possible to collect or classify two or more types of powder or granules due to differences in particle size or specific gravity. In this case, it cannot be said that collection or classification of powder particles is performed efficiently, and there are problems in terms of collection or classification processing and productivity.

Purpose of the Invention Therefore, the main purpose of the present invention is to enable the collection and classification of one or more types of granular materials, etc., to efficiently collect and classify the granular materials, and to An object of the present invention is to provide a cyclone separator that improves productivity in collection or classification processing.

Structure of the Invention In order to achieve the above object, the main means adopted by the present invention is to integrally join a hollow inverted cone-shaped part below a cylindrical part whose top is covered with a top plate, and to An inlet duct is connected tangentially or circumferentially to the top plate, and a discharge duct is connected to approximately the center of the top plate, while a first powder outlet is opened at the bottom of the conical part. In the cyclone separator, at least one opening is provided between the cylindrical part or between the cylindrical part and the inverted conical part, and the upper part is connected to the at least one opening via a connecting duct as appropriate. A pocket portion consisting of a covered first cylindrical body, a hollow first inverted cone body, or a combination thereof is connected, and the pocket portion and the discharge duct are communicated with each other by a short-circuit duct as appropriate, and a This is because the second powder outlet is opened.

For example, a part of the powder particles that are separated by the swirling airflow in the cylindrical part of the cyclone separator, reach the inner wall surface of the cylindrical part, and swirl downward reach at least one opening connected to the pocket part. Then, it is collected in this pocket. As the fluid flows into the pocket, the fluid that had been swirling just inside the inflow fluid now swirls while contacting the inner wall surface of the cylindrical section, causing the particles to flow into the inner wall of the cylindrical section. It can help you reach.

At this time, the powder collected in this pocket is coarse powder with a relatively large mass that is urged toward the side wall by the centrifugal force accompanying the rotation.

The coarse powder that has flowed into the pocket as described above swirls and descends due to the cyclone action within the pocket, and is collected from the second powder outlet at the bottom.

On the other hand, fine powder with a small mass does not enter the pocket portion, remains in the cyclone separator, and is collected from the first powder outlet.

Next, since the pocket part and the discharge duct are communicated by the short circuit duct, a part of the fluid passes through the cylindrical part series connection duct-pocket part-short circuit duct discharge duct.

At this time, coarse powder is repeatedly captured in the pocket portion.

Effects of the Invention According to the present invention, one or more types of powder or granules can be collected and
This makes it possible to perform classification, efficiently collect and classify the powder, and improve productivity in collecting or classifying the powder.

Next, with reference to FIGS. 1 to 4, embodiments embodying the present invention will be described to provide an understanding of the present invention.

Note that the following example is only one specific example of the present invention, and the technical scope of the present invention is not limited thereby.

Here, FIG. 1 is a plan view of a cyclone separator according to one embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a cylindrical portion and pocket of a cyclone separator according to another embodiment of the present invention. FIG. 4 is a cross-sectional view showing a modification of the connecting structure shown in FIG. 3.

Note that the same reference numerals will be used to describe the same elements as those of the conventional cyclone separator shown in FIG.

In FIGS. 1 and 2, the cyclone separator C' is
The apparatus is equipped with a cyclone separator main body 10 (hereinafter referred to as the main body) which employs the cyclone separator C shown in FIG. A pocket portion 24 having a cylindrical upper portion and an inverted conical lower portion is attached to the second opening 1a via a connecting duct 23.

In this case, a short circuit duct 30 is provided in the upper part of the pocket part 24 to connect the ceiling plate 4 of this pocket part 24 and the discharge duct 5 of the main body 10, and in the lower part of the same, a short circuit duct 30 is provided. A second granular material outlet 26 is provided to discharge the powdered granular material. In addition, the short circuit duct 30
A damper 31 is provided as an air volume adjusting means.

The connecting duct 23 is connected to the pocket portion 24 in its connection direction or in the circumferential direction so that the pocket portion 24 has a cyclone function.

Therefore, the cyclone separator C' with the above configuration is being explored.
Then, the air flow accompanied by the powder and granular material is introduced into the main body 10 through the inlet duct 6. In the cylindrical part 1 of the main body 1O, the air flow accompanied by powder particles swirls inside the cylindrical part 1, and is urged toward the inner wall of the cylindrical part 1 by the centrifugal force accompanying the swirl, and among them, coarse particles with a particularly large mass are is released into the pocket section 24 from the second opening 1a provided in the cylindrical section 1 due to the cyclone action in the main body 10. Then, the heavy and large powder discharged into the pocket section 24 falls due to gravity and is collected in the second powder discharge port 26 at the bottom, and is then discharged through a chute 27 equipped with a gate valve 28. be done.

On the other hand, light and small powder particles that do not enter the pocket section 24 during rotation in the cylindrical section 1 and descend while rotating inside the main body 10 reach the inverted conical section 2 of the main body 10, where the airflow As the radius of gyration becomes smaller, the centrifugal force is strengthened, the powder is collected at the lower part of the inverted cone-shaped part 2, and is discharged from the first powder outlet 3 through a chute 15 equipped with a gate valve 29.

That is, among the powder and granular materials introduced into the main body 10 from the inlet duct 6, coarse powder having a relatively large particle size is easily captured in the pocket portion 24 due to the cyclone function of the main body 10, and the inverted cone of the main body 10 Since fine powder with a relatively small particle size is captured in the body part 2, a cyclone separator equipped with a pocket part can also be used as a classifier. The airflow becomes a small-diameter swirling flow and rises through the center of the main body 10 and reaches the exhaust duct 5.
It is then discharged.

At this time, the pocket part 24 and the discharge duct 5 are communicated via the short circuit duct 30, and the main body 10 series connection duct 23 - pocket part 24 - short circuit duct 30 → discharge duct 5
Since an airflow is generated, it is possible to improve the capturing efficiency of the coarse powder side powder in the blurred portion 24.

Furthermore, in combination with the collection of powder and granules in the inverted conical portion 2, the collection performance of the cyclone separator C' as a whole can be improved.

In this case, especially when the connecting duct 23 is connected approximately tangentially or circumferentially to the outer periphery of the side wall of the pocket section 24, the pocket section 24 is configured in a cyclone shape, so that the connection duct 23 passes through the short circuit duct 30. There is an advantage that the amount of powder particles that are once collected in the pocket portion 24 and then leaked to the discharge duct 5 due to the short-circuit airflow can be minimized.

Furthermore, since the separation of the powder and granular material into the pocket portion 24 is performed using the swirling flow of gas existing within the main body 10,
Not only does the pressure drop in the cyclone separator C' not increase, but depending on the flow rate of the airflow through the short-circuit duct 30, the pressure drop in the cyclone separator C' can be reduced. In this case, the damper 31 appropriately controls the flow rate of the airflow passing through the short circuit duct 30.

Next, the pocket portion 24 can be provided in any desired position as long as it is on the side wall of the main body 10, in addition to the mounting positions shown in the above embodiments.

For example, if the main body of the cyclone separator is constituted by a cylindrical section of sufficient length, an opening is provided in the cylindrical section below the inlet duct, and the pocket section is connected to this opening via a connecting duct. Then, the powder and granules are sufficiently urged against the side wall of the cylindrical portion by the swirling flow and are pushed toward the pocket portion, so that a considerable amount of the powder and granules can be collected in the pocket portion.

Further, the pocket portion may be provided in the inverted cone-shaped portion of the main body, or the pocket portion may be provided extending from the cylindrical portion of the main body to the inverted cone-shaped portion.

As described above, when connecting the connecting duct 23 to the pocket part 24 (FIG. 1) in the tangential direction or the circumferential direction, the pocket part 24 can have a cyclone function. The connection method of the connection duct 23 is not limited to this, for example, by adopting a connection structure as shown in FIG. 3 or 4, the connection duct 2
3 to the pocket 24 in its radial direction.

For example, in the connection structure shown in FIG. 3, the second opening 1a
A slidable adjustment plate 25 is provided nearby, and a second
Pocket portion 24 via connecting duct 23 from opening 1a
The amount of coarse particles to be separated can be optimally adjusted as necessary by adjusting the insertion length of the adjustment plate 25 provided in the connection duct 23 near the second opening la. Further, the amount of the coarse-grained powder released into the pocket portion 24 can be adjusted by using the adjustment plate 25, as shown in FIG. Possible baffle board 25
It is also possible to carry out by b.

Furthermore, it is also possible to adjust the amount and particle size distribution of the coarse grain side powder to be separated depending on the height position of the cylindrical portion 1 or the inverted conical portion 2 at which the pocket portion 24 is provided.

In the above description, the present invention is not limited at all to the type of powder or granular material or the type of gas (combustion gas, air, etc.), and the shape of the cyclone or gas introduction part, the structure and arrangement of the pocket part, etc. It is also possible to freely change the design, for example, it is possible to arrange multiple pockets in one cyclone separator body, so it is possible to freely change the design of the cyclone separator body. can be separated into two or more types based on differences in particle size and specific gravity.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cyclone separator according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG. 4 is a cross-sectional view showing a modification of the connection structure shown in FIG. 3, and FIG. 5 is a partially cutaway perspective view of a conventional cyclone separator, which is the background of this invention. It is. (Explanation of symbols) C'...Cyclone component 1a...Second opening 3...First powder outlet 4...Top plate 5...Discharge duct 6...
・Inlet duct 23...Connection duct 24...
Pocket portion 26...Second powder outlet 30...
・Short duct.

Claims (1)

[Claims] 1. A hollow inverted conical part is integrally joined below a cylindrical part whose top is covered with a top plate, and an inlet duct is connected tangentially or circumferentially to this cylindrical part. In the cyclone separator, a discharge duct is connected to a substantially central part of the top plate, and a first powder outlet is opened at the bottom of the conical part, the cylindrical part or this cylinder. At least one opening is provided between the part and the inverted cone-shaped part, and a first cylindrical body whose upper part is covered with a ceiling plate or a hollow first inverted conical part is connected to the at least one opening via an appropriate connecting duct. A pocket portion made of a cone or a combination thereof is connected, the pocket portion and the discharge duct are appropriately communicated by a short-circuit duct, and a second powder outlet is opened in the lower part of the pocket portion. Cyclone separator. 2. The communication duct is connected to the pocket portion in a tangential direction or a circumferential direction thereof, and the short circuit duct is connected to a substantially central portion of the ceiling portion of the pocket portion and is connected to the inner side of the pocket portion. A cyclone separator according to claim 1, which is penetrated into a cyclone separator. 3. The cyclone separator according to claim 1 or 2, wherein the short circuit duct is equipped with an air volume adjusting means. 4. The cyclone separator according to any one of claims 1 to 3, wherein the connecting duct is equipped with means for adjusting the amount of powder and granular material flowing into the pocket portion.