JP3733351B2 - Granule classifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a granular classifier for separating and classifying powders and irregularly shaped materials (fine powder, floss, etc.) carried by an air current mainly in pneumatic transportation of granular materials, and is a direct powder from a silo. The present invention relates to a powder and particle classifier that can also be used when supplying particles.
[0002]
[Prior art]
A number of air classifiers using the difference in floating speed between products and irregular shapes have been proposed. Among them, there are a method in which a blower that supplies classification air is an essential condition, and a method that does not require a blower that supplies classification air and that can be operated only with transport air.
[0003]
As a system that requires a blower that supplies air for classification as an essential condition, an introduction pipe that drops powder particles from the raw material hopper into the cylinder is provided at the top of the cylindrical body, and a rectifying and discharging part that blows air at the bottom of the body is provided. In addition, there is a classifier composed of a so-called double cylinder in which a conical cylinder is installed between the discharge port of the introduction pipe and the rectifying discharge section (see Japanese Utility Model Publication No. 46-3411). However, this classifier has problems such as high manufacturing cost and low classification efficiency.
0004
As a classifier that does not require a blower for supplying air for classification and operates only with air for air transportation, as shown in FIG. 6, an inlet pipe 27 connected to the air transportation pipe at a lower position of the cylindrical body 26, as shown in FIG. A classifier having an outlet outlet 29 at its upper end and a separation portion 28 formed above it, with the tip outlet of the inlet pipe 27 facing upward, so that the air containing the granular material is ejected upward Is often used. However, with this classifier, the classification efficiency is extremely low. When classifying fine powder generated from polyethylene pellets by transportation, etc., a classification efficiency of about 60 to 80% can be obtained within a weight ratio of the transportation and transportation air of 1 to 2, but the transportation material and transportation air When the weight ratio is in the range of 4 to 8, the classification efficiency is 50% or less.
[0005]
[Problems to be solved by the invention]
On the other hand, when the above two types of classifiers are installed at the end of the transport pipe of a pneumatic transport system with fluctuations in pressure and instantaneous transportation amount as typified by plug transportation, classification is caused by excessive pressure fluctuation and instantaneous transportation amount. Efficiency becomes extremely low so that it cannot be put into practical use.
[0006]
An object of the present invention is to solve the above-mentioned problems found in conventional apparatuses, to provide a powder classifier having high classification efficiency and excellent cost.
[0007]
[Means for Solving the Problems]
While the inventors have variously devised and experimented on a classifier consisting of an inner and outer cylinder that separates and classifies irregularly shaped products such as fine powder and floss from the product of the granules, 3 is blown into the primary separation part formed between the upper surface of the inner cylinder and used as classification air, and other secondary air is blown into the gap between the inner and outer cylinders from the bottom surface of the inner cylinder. It has been found that an efficient classifier can be configured by using the secondary separation unit. Furthermore, Fukidase air upwardly from the tertiary air injection port formed in a collision dispersion plane as the top surface of the inner cylinder, the classification efficiency is found that is even better, it was completed the invention described below.
[0008]
Granule classifier is a first aspect of the present invention were deeply inserted into the upper portion of the cylindrical body of the exhaust port and the lower end to the coarse outlet at the upper end connection port to leave the cylinder from the upper portion of the outer cylinder formed respectively the feeding pipe is provided, provided the separation inner cylinder forming the secondary air injection ports on the lower surface of a hollow short cylindrical body at the bottom side of the outer tube, the lower end spout before Symbol feeding pipe at intervals before Symbol separation A pipe for blowing secondary air into the inner cylinder is arranged on the lower surface of the inner cylinder for separation so as to face the collision dispersion surface, which is the upper surface of the inner cylinder , the first separation portion between the collision dispersion surface of the tubular, made by forming respectively the second separation portion between the peripheral wall and the inner wall of the outer tube of the separation in the tube.
[0009]
Granule classifier is a second aspect of the present invention were deeply inserted into the upper portion of the cylindrical body of the exhaust port and the lower end to the coarse outlet at the upper end connection port to leave the cylinder from the upper portion of the outer cylinder formed respectively Separation pipe provided with an inlet tube, a secondary air outlet formed on the lower surface with a hollow short cylinder, and a tertiary air outlet formed from a large number of small holes for blowing air upward to the collision dispersion surface, which is the upper surface the inner cylinder is provided at the bottom side of the said barrel, before SL is opposed to the collision dispersion surface before Symbol separation inner cylinder at a lower end spout spacing feeding pipe, the inner lower surface of the separation inner cylinder secondary and tertiary air blowing for inclusive piping of air into the cylinder is disposed, the first separation portion between the lower end spout collision dispersion plane of the separation inner cylinder of the feeding pipe, said separating inner cylinder Secondary separation portions are respectively formed between the peripheral wall and the inner wall of the outer cylinder.
[0010]
The particulate classifier according to the third aspect of the present invention is the particulate classifier according to the second aspect of the present invention, wherein the amount of air from the tertiary air jet nozzle provided on the collision dispersion surface of the separation inner cylinder and the inner part for separation are separated. amount of air from the secondary air injection ports of the cylinder to so that each can be adjusted individually, formed by separating the separation for inner cylinder lower surface of the air sparging pipes for the tertiary air for jetting secondary air injection.
[0011]
Granule classifier is a fourth invention, coarse outlet to the top of each form were the outer cylinder to the exhaust port and the lower end to the upper portion of the cylindrical body, a feeding join the club to be connected to the air transport pipe to the exhaust pipe It has been placed an air separation apparatus to take out the air from the mixture of powdery grains and air to be air transported by said transport tube and deeply inserted into the outer tube connected to the lower side of the air separation unit the granular material feeding pipe is provided, the separation inner cylinder forming the secondary air injection ports on the lower surface of a hollow short cylindrical body, provided at the bottom side of the said outer tube, the spacing of the lower end spout before Symbol feeding pipe opened to face the collision dispersion surface, which is the upper surface of the front Symbol separation inner cylinder, the said pipe for secondary air blow into the inner cylinder disposed on the lower surface of the separation in the cylinder, the lower end ejection of the feeding pipe the first separation portion between the mouth and the collision dispersion plane of the separation in the cylinder, a second separation unit are respectively formed between the peripheral wall and the inner wall of the outer tube of the separation inner cylinder It becomes.
[0012]
The granular material classifier according to the fifth invention is the granular material classifier according to the fourth invention, wherein the space between the exhaust pipe of the air separation device and the secondary air blowing pipe of the inner cylinder for separation is used. It connects with piping which has an air volume adjusting valve, and is comprised so that the used transport air separated with the said air separation apparatus may be reused as classification air.
[0013]
The granular material classifier according to the sixth aspect of the present invention is the granular material classifier according to the fourth aspect of the present invention, wherein the used transportation air after being separated by the air separation device is directly discharged to the dust collector. The exhaust pipe of the air separation device and the dust collector are connected by piping, and the diameter of the input pipe connected to the lower side of the air separation device is made small enough to discharge the average amount of the granular material conveyed by air.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the powder classifier comprising the basic structure of the present invention has an exhaust port 7 at the upper part of the cylindrical body and a coarse grain outlet 6 at the lower end from the upper part in the outer cylinder 1 formed respectively. The lower end outlet 14 of the inlet pipe 3 inserted deeply into the outer cylinder 1 or the inlet inserted deeply into the outer cylinder 1 connected to the lower side of the air separation device 4 connected to the air transport pipe shown in FIG. The lower end jetting port 14 of the pipe 3 is opposed to the collision dispersion surface 11 which is the upper surface of the separating inner cylinder 2 having the secondary air jetting port 10 provided near the lower part of the outer cylinder 1, and the jetting nozzle A primary separation portion 8 is formed between 14 and the collision dispersion surface 11 of the separation inner cylinder, and a secondary separation portion 9 is formed between the peripheral wall of the separation inner cylinder 2 and the outer cylinder 1.
[0015]
As described above, the insertion tube 3 is inserted deeply into the outer cylinder 1 and the separation inner cylinder 2 is provided near the lower portion of the outer cylinder in the fine powder dispersed and rising in the primary separation portion 8. This is to ensure the sedimentation portion 15 having a height necessary to drop and collect the granular material belonging to the coarse particles contained by gravity. Although the height of the sedimentation part is better, the minimum required dimension depends on the size of the granular material to be classified. In the case of PP pellets, 300-500 mm is appropriate. The lower end spout 14 of the feeding pipe 3, as shown in the figures, by an opening opened in a trumpet shape, a granular material plug granular material or falling ejected in the collision dispersion plane It is possible to increase the classification effect by dispersing and colliding over a wide range.
0016
With the above configuration, if the granular material carried in the transportation air or the granular material sent by the high-pressure transportation air collides with the collision dispersion surface 11 of the separation inner cylinder from the lower end jet port 14, primary separation is performed. The granular material dispersed in the portion 8 and separated into coarse particles in the settling portion 15 falls to the secondary separation portion 9 between the peripheral wall of the separation inner cylinder and the outer cylinder by gravity. Here, it is further dispersed by the secondary air that is ejected from the secondary air outlet and ascends the secondary separation part 9, and the granular material belonging to the coarse particles falls by gravity and is separated from the coarse particle outlet 6 to the outside. Fall. Moreover, although the fine powder after classification rises with secondary air and is discharged | emitted from a discharge port, it is discharged | emitted, for example through a dust collector.
[0017]
In the present invention, various separators such as a pipe made of a perforated plate called a cyclone separator, a bag filter, and a punching plate are used as an air separator for taking out air from a mixture of air-transported granular material and air. Any can be used.
[0018]
According to the air separation device 4 of the example, a part of the transported air taken out from the mixture of the air-transported particulate and air passes through the pipe 12 and the regulating valve 24 as shown in FIG. It can be reused as secondary air for separating powder particles.
[ 0019 ]
On the other hand, as shown in FIG. 5, when the exhaust pipe 23 is connected to a dust collector (not shown), most of the transported air flows to the exhaust side of the air separator. Large fluctuations in the amount of instantaneous air blown out can be avoided. In addition, the air transported plug can be temporarily stored in the air separator conical section 20 and then dropped, so the effect of fluctuations in the instantaneous transport amount and pressure is alleviated. It can be separated efficiently.
[ 0020 ]
In particular, it is connected to the lower side of the air separation device, and is connected to the lower side of the air separation device so that the used transportation air after it is separated by the air separation device 4 that separates the air-transported particulates is exhausted directly to the dust collector. By configuring the pipe diameter to be small enough to discharge the average amount of powder particles that are pneumatically transported, the transportation air after separating the powder particles is almost discharged from the lower end outlet 14 of the input pipe. And can be discharged from the exhaust pipe of the air separation device.
[ 0021 ]
In addition, since the pellets falling from the input pipe always fall in an amount close to the average amount of pneumatic transportation, the instantaneous change in the amount of pellets is small. As a result, when used in an air transportation system with fluctuations in pressure and instantaneous transportation amount, the influence of fluctuations can be completely eliminated, and the separation and classification of the granular materials can be performed efficiently.
[ 0022 ]
In addition, when the air blown out from the tertiary air jet port provided on the collision dispersion surface which is the upper surface of the separation inner cylinder is discharged, the classification effect can be improved by the effect of directly blowing the fine powder mixed in the coarse particles. . The small hole that forms the tertiary air outlet may be a circular hole or an elongated slit. The shape is not limited, but the larger the amount of air blown out, the greater the effect. However, since it is necessary to keep the wind speed of the secondary separation part so that fine powder does not fall, it is important to adjust and control to an appropriate ratio.
[ 0023 ]
The configuration example shown in FIG. 3 shows the amount of air blown from the upward tertiary air jet 5 provided on the collision dispersion surface, which is the upper surface of the separation inner cylinder, and the air blown from the downward secondary air jet 10 on the lower face of the separation inner cylinder. The air supply passage to the separation inner cylinder was separated into a top jet (pipe 18) and a bottom jet (pipe 12) so that the amount could be adjusted individually .
[ 0024 ]
In the case of such a configuration, depending on the classification target and the amount of primary air, for example, when separating fine powder from PP pellets transported by air corresponding to the amount of secondary air, it blows out from the collision dispersion surface which is the upper surface. About half of the secondary air rising from the secondary separator is appropriate for the amount of air. In this case, the amount of fine powder remaining in the coarse particles after classification is further reduced by 40 to 50% compared to the case without tertiary air, and a high classification effect is obtained.
[ 0025 ]
In addition, as shown in FIG. 2, when the individual adjustment mechanism is not provided, priority is given to securing the wind speed of the secondary separation unit, and therefore the amount of air blown out from the tertiary air outlet 5 on the upper surface of the collision dispersion surface is A more stable classification effect can be obtained by suppressing the secondary air rising from the secondary separation section 9 to about 30%.
[ 0026 ]
Furthermore, when putting the granular material directly into the classifier from the silo, for example, in the granular material classifier of FIG. 1, the silo is directly joined to the upper end connection port 13 via a feeder (not shown).
[ 0027 ]
【Example】
Example 1
The granular material classifier in air transport according to an embodiment of the first invention will be described with reference to FIG. An exhaust port 7 is provided at the upper part of the cylindrical body, a coarse outlet 6 is provided at the lower end, and an inlet pipe 3 is provided which is inserted deeply into the cylinder leaving the upper end connection port 13 from the upper surface of the formed outer cylinder 1, respectively. A separation inner cylinder 2 provided with a secondary air outlet 10 on the lower surface of the cylinder is provided near the lower portion of the outer cylinder 1, and the lower end outlet 14 of the input pipe 3 is spaced apart from the separation inner cylinder 2. Opposite the collision dispersion surface 11 which is the upper surface, the secondary air blowing pipe 12 is connected to the lower surface of the separation inner cylinder 2, and is the lower end outlet 14 of the inlet pipe 3 and the upper surface of the separation inner cylinder 2 A primary separation part 8 is formed between the collision dispersion surface 11 and a secondary separation part 9 is formed between the peripheral wall of the separation inner cylinder 2 and the outer cylinder 1.
[ 0028 ]
The secondary air outlet 10 formed on the lower surface of the separation inner cylinder 2 has the bottom surface of the separation inner cylinder 2 without a bottom plate, and the tip air inlet of the secondary air blowing pipe 12 is placed at the center of the bottom surface. The opening surface is supported by a plurality of support members, or the tip blowing port of the pipe 12 is attached to a hole formed in the center of the bottom plate, and the bottom plate is provided with a small hole provided with a large number of small holes on the entire surface of the plate.
[ 0029 ]
In the present granule classifier in which the upper end connection port 13 is joined to the end of the transport pipe, the transport air containing the powder is sent into the classifier through the input pipe 3. Then, the transport air ejected from the lower end ejection port 14 collides with the collision dispersion surface 11 and rebounds, so that the granular material is dispersed and classified in the primary separation unit 8.
[ 0030 ]
The coarse particles with high inertia once collide with the collision dispersion surface and jump up, but they fall again due to gravity at the settling part 15 near the inner peripheral surface of the outer cylinder 1 and between the peripheral wall of the separating inner cylinder and the outer cylinder Falls into the secondary separation part 9 of. Further, the exhaust containing the remaining light fine powder rises and is discharged from the exhaust port 7 to the outside.
[ 0031 ]
In the secondary separation unit 9, secondary dispersion is performed by secondary air that is ejected from the secondary air outlet 10 on the lower surface of the separation inner cylinder 2 and rises, and the classified coarse particles fall and become coarse particles It is taken out from the outlet 6 and collected. On the other hand, the exhaust gas containing only fine powder rises and is discharged to the outside from the discharge port 7.
[ 0032 ]
Example 2
The granular material classifier according to an embodiment of the second invention will be described with reference to FIG. An exhaust pipe 7 at the upper part and a coarse grain outlet 6 at the lower end are provided with an inlet pipe 3 for sending transport air containing powder particles into the classifier on the upper side of the outer cylinder 1, and a secondary pipe on the lower side. The basic configuration in which the separation inner cylinder 2 for blowing air is provided is the same as that of the first embodiment. Further, a tertiary air jet port 5 composed of a large number of small holes is added to the collision dispersion surface 11 which is the upper surface of the separation inner cylinder 2.
[ 0033 ]
Thus, the dispersion efficiency in the primary separation unit 8 can be increased by blowing tertiary air upward from the collision dispersion surface 11 that is the upper surface of the separation inner cylinder 2. In the case of the embodiment shown in FIG. 2, it is indispensable to install a plate having innumerable small holes at the secondary air outlet 10. Otherwise, the amount of air blown out from the air outlet 5 provided on the upper surface is insufficient, and the effect of increasing the classification efficiency by the tertiary air is lost.
[ 0034 ]
Example 3
The granular material classifier in air transport according to an embodiment of the third invention will be described with reference to FIG. An exhaust port 7 is provided at the upper part of the cylindrical body, a coarse outlet 6 is provided at the lower end, and an inlet pipe 3 is provided which is inserted deeply into the cylinder leaving the upper end connection port 13 from the upper surface of the formed outer cylinder 1, respectively. A separation inner cylinder 2 is installed near the lower part of the outer cylinder 1 and is divided into a secondary air outlet 10 facing downward on the lower surface and a tertiary air outlet 5 facing upward on the upper surface. It is.
[ 0035 ]
Further, the lower end outlet 14 of the input pipe 3 is spaced apart from the upper air outlet 5 on the upper surface of the separation inner cylinder, and the secondary air blowing pipe 12 is connected to the lower end of the separation inner cylinder 2. Connected to the secondary air outlet 10 side, and the tertiary air blowing pipe 18 is connected to the upward tertiary air outlet 5 side, and the lower end outlet 14 of the inlet pipe 3 and the upper surface of the separation inner cylinder 2 are connected to each other. A primary separation portion 8 is formed therebetween, and a secondary separation portion 9 is formed between the peripheral wall of the separation inner cylinder 2 and the outer cylinder.
[ 0036 ]
In the present granule classifier having the upper end connection port 13 joined to the end of the transport pipe, transport air containing the powder is sent into the classifier through the input pipe 3. Then, the transport air ejected from the lower end ejection port 14 collides with the tertiary air ejected from the upward air ejection port 5 and is dispersed and classified in the primary separation unit 8. The granular material with large inertia once hits the collision dispersion surface and jumps up, but falls again at the settling part 15 near the inner peripheral surface of the outer cylinder 1 by gravity and reaches the secondary separation part 9.
[ 0037 ]
Here, secondary dispersion is performed by the secondary air that is ejected from the secondary air outlet 10 on the lower surface of the separation inner cylinder 2 and ascends, and the classified coarse particles fall and are taken out from the coarse particle outlet 6. And collected. On the other hand, the exhaust gas containing only fine powder is discharged from the discharge port 7 to the outside.
[ 0038 ]
Example 4
The granular material classifier according to an embodiment of the fourth invention and the fifth invention will be described with reference to FIG. Exhaust port 7 at the upper part of the cylindrical body and coarse grain outlet 6 at the lower end, the inlet 22 and the exhaust pipe 23 are exposed on the upper surface of the formed outer cylinder 1, and the lower exhaust port is located in the outer cylinder 1 An air separation device 4 connected to the input tube 3 inserted deeply is provided. In addition, a separation inner cylinder 2 having a hollow short cylindrical body and a secondary air ejection port 10 provided on the lower surface is provided near the lower part of the outer cylinder 1, and the lower end ejection port 14 at the tip of the input tube 3 is spaced and separated. This is opposed to the collision dispersion surface 11 which is the upper surface of the inner cylinder 2. In addition, the tertiary air jet nozzle which consists of many small holes can be provided in a collision surface as needed.
[ 0039 ]
Then, through the adjustment valve 24 in the middle, one end of the secondary air blowing pipe 12 is connected to the exhaust pipe 23, and the other end is connected to the lower surface of the separation inner cylinder 2 so that the exhaust gas of the transportation air Is used as secondary air to classify the pellets. A classifier blower 25 is connected to the secondary air blowing pipe 12, and secondary air different from the exhaust gas can be supplemented as necessary.
[ 0040 ]
Further, the pressure loss of the pipe 12 and the input pipe 3 in the powder classifier varies depending on the transport amount, the difference in the pipe diameter and the input pipe diameter, and the like. If the pressure loss of the input pipe is too high, almost the air separated from the transport air flows to the secondary air side. In that case, even if the granular material is introduced into the collision dispersion surface from the introduction pipe, it is not dispersed. In order to solve this problem, the adjustment valve 24 may be throttled to increase the amount of air blown from the lower end outlet 14 via the input pipe 3.
[ 0041 ]
Example 5
An embodiment in which the fourth invention is applied to a plug transport system 5 will be described with reference to (Figure is being shared with Example 6). Exhaust port 7 at the upper part of the cylindrical body and coarse grain outlet 6 at the lower end, the inlet 22 and the exhaust pipe 23 are exposed on the upper surface of the formed outer cylinder 1, and the lower exhaust port is located in the outer cylinder 1 An air separation device 4 connected to the input tube 3 inserted deeply is provided.
[ 0042 ]
In addition, a separation inner cylinder 2 having a hollow short cylindrical body and a secondary air ejection port 10 provided on the lower surface is provided near the lower part of the outer cylinder 1, and the lower end ejection port 14 at the tip of the input tube 3 is spaced and separated. This is opposed to the collision dispersion surface 11 which is the upper surface of the inner cylinder 2. The exhaust pipe 23 is connected to a dust collector (not shown).
[ 0043 ]
In this case, the amount of gas blown out from the lower end outlet 14 at the tip of the input pipe 3 is small, and the air transported plug can be temporarily stored in the air separator conical part 20 and then dropped, so the instantaneous transport amount and pressure fluctuations Can be separated efficiently with high classification efficiency even if incorporated in a plug transport system.
[ 0044 ]
Example 6
The granular material classifier according to an embodiment of the sixth invention will be described with reference to FIG. Exhaust port 7 at the upper part of the cylindrical body and coarse grain outlet 6 at the lower end, the inlet 22 and the exhaust pipe 23 are exposed on the upper surface of the formed outer cylinder 1, and the lower exhaust port is located in the outer cylinder 1 An air separation device 4 connected to the input tube 3 inserted deeply is provided.
[ 0045 ]
In addition, a separation inner cylinder 2 having a hollow short cylindrical body and a secondary air ejection port 10 provided on the lower surface is provided near the lower portion of the outer cylinder 1, and the lower end ejection port 14 at the tip of the input tube 3 is spaced apart for the separation. It is opposed to the collision dispersion surface 11 which is the upper surface of the inner cylinder 2. The collision surface should be provided with a tertiary air outlet comprising a large number of small holes. Moreover, when not providing a tertiary air jet nozzle, it is desirable to make a collision surface conical and to make a pellet flow easily to an outer periphery.
[ 0046 ]
The diameter of the input pipe 3 is configured to be small enough to discharge the average amount of pellets that are pneumatically transported, and the exhaust pipe 23 of the air separation device 4 is connected to a dust collector (not shown) It is provided so as to exhaust the used transportation air after the separation. Further, the secondary blower 25 connected to the secondary air outlet 10 is connected to a classification blower 25 to send secondary air.
[ 0047 ]
By configuring in this way, the transported air after separating the granular material can be discharged from the exhaust pipe 23 of the air separation device without being discharged from the lower end outlet 14 of the input pipe. As a result, when used in an air transportation system with fluctuations in pressure and instantaneous transportation amount, the influence of fluctuations can be completely eliminated, and the separation and classification of the granular materials can be performed efficiently.
[ 0048 ]
【The invention's effect】
The present invention is a classifier comprising an exhaust outlet at the upper part and a coarse grain outlet at the lower end, and an outer cylinder formed with a separation inner cylinder having a powder inlet pipe and an air outlet for classification. Used as a classifier for granular materials in pneumatic transportation equipment, secondary air is ejected from the inner cylinder for separation, and primary and secondary separation sections are formed in the outer cylinder to disperse and classify the granular materials By repeating this twice, high classification efficiency can be obtained. Further, when an air separation device is provided, the used transport air to be discarded can be effectively reused as secondary air for separating and classifying pellets.
[Brief description of the drawings]
[1] Example of the first invention, the cross-section of the outer tube, and broken away part of the separation in the tube is an explanatory diagram showing a schematic internal configuration.
[2] The embodiment according to the second invention, is an explanatory diagram showing a schematic internal configuration to cross the outer tube and separating the tube.
[3] Example of the third invention, is an explanatory diagram showing a schematic internal configuration to cross the outer tube and separating the tube.
[4] The embodiment according to the fourth invention, is an explanatory view schematically showing an internal configuration cutaway outer cylinder.
FIG. 5 is an explanatory diagram showing an outline of an internal configuration of an embodiment according to the fifth and sixth inventions by breaking an outer cylinder.
FIG. 6 is an explanatory view showing an example of a powder classifier operating with conventional air transport air.
[Explanation of symbols]
1 outer cylinder
2 Inner cylinder for separation
3 Input pipe
4 Air separation device
5 Tertiary air outlet
6 Coarse grain outlet
7 Exhaust port
8 Primary separation part
9 Secondary separation part
10 Secondary air outlet
11 Impact dispersion surface
12 Piping for blowing secondary air
13 Top connection port
14 Bottom outlet
15 Settling part
18 Tertiary air blowing piping
20 Air separator conical section
22 Delivery department
23 Exhaust pipe
24 Regulating valve
25 classification blower
26 cylinders
27 incoming pipe
28 separation part
29 outlet

Claims (5)

Provided with an introduction pipe inserted deeply into the cylinder leaving the upper end connection port from the upper part of the outer cylinder in which the coarse outlet is formed at the upper part and the lower part at the upper part of the cylindrical body,
The separating inner cylinder having upwardly provided tertiary air ejection port formed from a number of small holes for blowing air into collision dispersion surface is a top with a lower surface of a hollow short cylindrical body to form a secondary air jet port, said Provided near the bottom of the outer cylinder,
Is opposed to the collision dispersion surface before Symbol separation inner cylinder at intervals to lower spout before Symbol feeding pipe,
Disposing piping for blowing secondary and tertiary air into the inner cylinder on the lower surface of the inner cylinder for separation;
Flour primary separation unit, and the second separation unit are respectively formed between the peripheral wall and the inner wall of the outer tube of the separation inner cylinder between the lower end spout collision dispersion plane of the separation inner cylinder of the feeding pipe Granule classifier. Amount of air from the secondary air injection port of the air amount and the separation in the cylinder from the provided collision dispersion surface of the separation inner cylinder tertiary air jet port a so that each can be adjusted separately,
2. The granular material classifier according to claim 1, wherein the air blowing pipe on the lower surface of the separation inner cylinder is separated for secondary air ejection and tertiary air ejection . In the upper part of the outer cylinder that formed the exhaust outlet and the coarse grain outlet at the lower end at the top of the cylindrical body,
A join the club and the exhaust pipe feed to be connected to the air transport pipe is placed an air separation apparatus to take out the air from the mixture of powdery grains and air to be air transported by the transport tube,
The granular material injection tube which deeply inserted into the outer tube connected to the lower side of the air separation device is provided,
Hollow separating inner cylinder forming the secondary air injection ports on the lower surface with short tube bodies of, provided in the lower side of the said barrel,
Is opposed to the collision dispersion surface, which is the upper surface of the front Symbol separation inner cylinder at intervals down end spout before Symbol feeding pipe,
Arranging a secondary air blowing pipe into the inner cylinder on the lower surface of the separating inner cylinder,
Flour primary separation unit, and the second separation portion between the peripheral wall and the inner wall of the outer tube of the separation inner cylinder are respectively formed between the lower end spout collision dispersion plane of the separation inner cylinder of the feeding pipe Granule classifier. Connect the exhaust pipe of the air separation device and the secondary air blowing pipe of the inner cylinder for separation with a pipe having an air volume adjustment valve,
4. The granular material classifier according to claim 3, wherein the used transport air separated by the air separation device is reused as classification air. Connecting the exhaust pipe of the air separation device and the dust collector so as to exhaust the used transport air after being separated by the air separation device directly to the dust collector;
4. The granular material classifier according to claim 3, wherein the diameter of the input pipe connected to the lower side of the air separation device is made small enough to discharge the average amount of the granular material conveyed by air.

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