KR840001165B1 - Sorting device - Google Patents

Abstract

A sorting device to separate powdered material, esp. cement, into fine and coarse particles, consists of a main body(2) and a hopper (3) attached under the main body. The main body consists of a powder-air mixt. inlet (4) fixed tangentially to the main body, a fine particle exit(6) formed at the center of the main body, a rotating axis (7), a rotating plate(8) to disperse and separate the powder, and guide blades to introduce the powder-air mixt. into the inside of the main body.

Description

Classifier

1 is a plan view of one embodiment of a classifier of the present invention.

2 is a cross-sectional view taken along the line A-A 'of FIG.

3 is an exemplary plan view of the operating mechanism of the guide vane used in the classifier of FIG.

Figure 4 is an exemplary longitudinal cross-sectional view other than the classifier of the present invention.

5 is a plan view of a modification of the vortex adjustment braid of the classifier of FIG. 4;

6 and 7 are plan views of modifications of the respective vortex adjustment braids.

8 is a longitudinal sectional view of another embodiment other than the classifier of the present invention.

9 is a plan view of the rotating plate of the classifier of FIG.

10 is a longitudinal sectional view of another embodiment other than the classifier of the present invention.

11 is a plan view of a horizontal dispersion member of the classifier of FIG.

12 is a longitudinal sectional view of another embodiment other than the classifier of the present invention.

13 is a plan view of a rotating plate of the classifier of FIG.

14 and 15 are graphs showing the classification characteristics of the classifiers of the classifiers of FIGS. 1 to 4 and the classifier of FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a classification apparatus for separating classified raw materials, in particular, powdered semint into fine and coarse powder. In general, in the crushed part of the cement manufacturing process, the tub mill and the air separate A closed loop system using a combination of the above has been established.

In this grinding part, although a large amount of electric power is consumed, improvement of grinding efficiency, classification efficiency, etc. has been tried variously in order to reduce this, and it was one of the prominent means to increase the air volume through a mill. Conventionally, the amount of air flowing through the mill is at the limit necessary to prevent the oscillation in the mill, but actively has the air volume of several times, that is, the air vortex reinforcement to increase the cooling effect of the cement, to prevent the over-pulverization of cement, This prevents the adhesion of powder to the ball.

As a result, the grinding effect is good and the grinding power is reduced. However, in this case, the rate of mixing of the coarse powder in the exhaust gas increases, so that a classifier for mill exhaust should be added.

That is, the external cyclone and the circulation fan-dispersion type air separator, ie, the cyclone-type air separator, which are conventionally used in the cement industry, must be separately formed by distributing powder, not by air.

As the classifier, ordinary cyclones are widely used for dust collection, but they are also used as classification in cases where a high degree of classification is not required.

In the case of using the cyclone, the classification particle size is determined by the size of the cyclone, but it cannot be changed by one cyclone, and furthermore, it is limited to the range of 1 to 20㎛, and when the powder concentration is 0.1㎏ / ㎥, the dispersion is not sufficient. The classification level is reduced. Therefore, it is inappropriate to use a cyclone as a classifier in order to select various classification particle diameters with one classifier and widen the classification particle diameter to 20 micrometers or more, and to process powder of high solid concentration.

In particular, when using the cyclone as a classifier for mill exhaust after reinforcing the air pulverized in the above-mentioned cement manufacturing process, the fine particles that can be used as cement products are mixed in the bulk, and returned to the mill as half powder, Grinding is inefficient and uneconomical, and the effect of vortex strengthening of the air described above is halved.

The present invention aims to solve the above-mentioned disadvantages of the cyclone and to precisely disperse the airflow at high concentrations in the air vortex reinforcement, thereby obtaining a new classification device suitable for mass processing.

The classifying apparatus of the present invention comprises a hollow cylindrical cylinder body and a conical hopper formed at the bottom of the barrel body, a subdivision discharge pipe formed at the center of one end of the body, and a mutually circumferentially opposite position projecting tangentially from the barrel body. Formed air-body raw inlet. Dispersion of the secondary air inlet, the rotating shaft which is coaxially stretched in this cylinder main body, and the powder raw material fixed to this rotating shaft and the coaxial in this cylinder main body. Dispersion classification is provided with a rotary plate for common use and a guide vane for introducing the air-powder raw material formed in the circumferential direction into the cylinder body in the barrel body.

According to this configuration, the classifier of the present invention has the effect of accurately and mass-processing the main body material conveyed to the air stream after air vortex reinforcement as a classifier for mill exhaust.

The vortex adjustment blade whose one end is fixed to each rotating plate in the cylinder main body mentioned above may be arrange | positioned at intervals in parallel with a rotating shaft and the circumferential direction of a rotating plate.

By this adjustment braid, it is possible to suppress lanzo generation in the vortex of the air-body raw material flowing into the cylinder main body and to improve the classification performance of the classifier. One or more stages of ring-shaped partition members may be formed coaxially with the above-described central axis in the cylinder body. Each diaphragm member prevents the language of the vortex in the barrel and improves the classification performance of the classifier.

The main body raw material inlet is again formed in the barrel main body, and dispersion and members may be formed in the bottom of the main body raw material inlet. In this way, it is possible to process a large amount of raw materials, and it is possible to process the high-concentration density exhaust at the time of air vortex reinforcement and the raw material after pulverization discharged from the mill by the same apparatus.

1 and 2, the cylinder 1 of the classifying apparatus includes a vertical hollow cylinder body 2 in which semicircles are joined to each other in a cross section, and a conical hopper 3 installed at a lower end thereof. It becomes The air-raw inlet 4 protrudes from the side wall of the cylinder body 2 toward the tangential outer side.

(FIG. 1) The secondary air intake port 5 protrudes toward the tangential outer side from the side wall of the cylinder main body 2 on the opposite side to the inlet 4 in the radial direction. Moreover, it extends to the upper part of the fine part discharge pipe 6 in the upper end center part of the cylinder main body 2. As shown in FIG. (Fig. 2) The male rotary shaft 7 extends to the center of the subdivision discharge pipe 6 and the main body 2, and the rotary shaft 7 has an upper end such as an electric motor, a hydraulic motor, or the like. It is fixed to the power motor and thereby rotated.

The horizontal rotating plate member 8 which serves as the dispersion and classification of the powder raw material is coaxially fixed to the lower end of the rotating shaft 7 so that the edge is located at the contact between the cylinder body 2 and the hopper 3.

The upper surface 9 of the rotating plate member 8 becomes a cone of gentle inclination, which not only smoothly disperses and classifies the classification raw materials but also prevents the subdivisions deposited thereon after classification. The central part of the cylinder main body 1 consists of the classification chamber 10 which communicates with the inlet 4, the inlet 5, and the discharge pipe 6, etc., and has it on the circumference centering on the central axis of the double rotating shaft 7, etc. The guide vanes 11 of vertical length at intervals are provided in parallel to the rotational shaft 7.

Each guide blade 11 is supported on the upper and lower walls of the cylinder main body 2 by the bearing 12, and the lever 13 is formed in the upper end which penetrated the upper wall of the cylinder body 2 of one of the guide blades 11. It is possible to adjust the inclination angle with respect to a plane including the center of the classifying chamber 10 of the guide vane 11, that is, the rotation axis 7 and the rotation axis of the guide vane 11 itself, in conjunction with the operation of the lever 13. have.

As a method of interlocking the guide vanes 11, for example, when the guide vanes 11 are rotated around the longitudinal center line or the inner edge thereof, the outer edges of adjacent guide vanes 11, as shown in FIG. Connection can be made, and when the guide blade 11 is rotated around the longitudinal center line or the outer edge thereof, the inner blade of the guide blade 11 may be connected by a ring.

Referring to FIG. 2, a charge damper 15 is formed in the subdivision discharge pipe 6, and the opening cross-sectional area of the pipe 6 is adjusted in accordance with the amount of charge into these pipes 6, thereby classifying the classification point. Improves control and classification.

That is, the deeper the amount of the borrowed damper 15 into the subdivision discharge pipe 6 is, the deeper the cross-sectional area of the opening of the pipe 6 is reduced in accordance with the amount of charge into the subdivision discharge pipe 6, and the air volume for the classification is reduced. . Therefore, the vortex in the classification chamber 10 becomes weak and a classification point falls. On the contrary, if the damper 15 is pulled out and the opening area of the subdivision discharge pipe 6 is increased, the air volume for the classification is increased, the vortex is increased, the classification point is increased, and the classification degree is improved. However, if the air volume is larger than necessary, the internal pressure of the classifier increases to increase consumption power, and the wind speed in the subdivision discharge pipe 6 rises to promote wear of the subdivision discharge pipe 6. Therefore, since the required classification point can be obtained by adjusting the amount of charge of the damper 15, it is possible to set the optimum classification quantity and the optimum operating conditions of the classification apparatus and to improve the efficiency of the classification apparatus. A pocket 16 is formed at the portion adjacent to the air-raw material inlet 4 of the tube body 2 to prevent the coarse powder from going toward the inlet 4. (Figure 1)

The coarse powder outlet 17 is formed in the lower end of the hopper 3, and the tertiary air inlet 18 is formed in the side wall of the hopper 3. As shown in FIG. In operation, the rotary shaft 7 and the rotary plate member 8 are integrated by the drive motor to rotate clockwise during the first period.

The other classification raw material flows into the classification chamber 10 while drawing a swirling line, which is oriented by the guide vanes 11 set at an appropriate angle and supplied at an appropriate speed from the air-raw material inlet 4 like air. In this case, when the amount of raw material (hereinafter referred to as powder concentration) to the air is excessive and the amount of air is insufficient, air is supplemented at the secondary air inlet 5 so that the appropriate powder concentration can be adjusted.

The air mixing powder raw material flowing while swirling in the classification amount 10 is accelerated by the rotating plate member 8 to simultaneously receive two forces in which the direction of the inward centrifugal force and the inward air resistance in the radial direction are opposite to each other. Will be.

When these two forces have a conflicting particle size, the classification point is referred to as a classification point. For the particles below the classification point, that is, the subdivision force, the inward air resistance side is larger than the outward centrifugal force, and the air flows toward the center of the classification chamber 10. And, it is boosted by the subdivision discharge pipe 6 and collected by a collector (not shown) formed separately.

On the other hand, the coarse powder having a particle diameter more than the classification point has a larger centrifugal force side than the inward air resistance, and falls in the hopper 3 while flowing along the inner axis of the guide vane 11. In addition, the coarse portion reaches the pocket 16 and quickly falls to the direct hopper 3 here.

In the hopper 3, the coarse powder is recovered through the rotary valve (not shown) at the coarse discharge outlet 17. As air is introduced from the tertiary air inlet 18, it is attached to the coarse powder and into the hopper 3. It is possible to improve the degree of classification by dispersing the fine powder which has been introduced, transferring and reclassifying it into the upper classification chamber 10.

That is, in FIG. 2, by introducing air from the tertiary air inlet 18 into the hopper 3, the fine particles attached to the coarse powder in the hopper 3 are dispersed, and the air is introduced into the hopper 3 Since the tertiary air inlet 18 is inclined with respect to the inside of the hopper 3, the air is also caught in the coarse downward in the inclined direction, so that the force of the inclined downward acts on the dispersed subdivision.

Further, since the negative pressure for subdivision discharge is applied to the subdivision discharge pipe 6 located above the hopper 3 and the classification chamber 10, the subdivision discharge tube is also inside the hopper 3 through the classification chamber 10. Negative pressure towards (6) acts. Therefore, in the third air inlet 18, the fine powder dispersed in the negative pressure against the force of the inclined downward air rises in the hopper 3 and is transferred from the hopper 3 to the classification chamber 10, and then the third It is taken out from the air intake 18. On the other hand, coarse powder falls in the hopper 3 by self-weight, and is taken out from the coarse powder discharge port 17.

In the constitution, the coarse powder and the subdivision are separated in the hopper 3, the former is led to the lower coarse discharge outlet 17, and the latter is returned to the classification chamber 10 for classification. 18) is taken out. Therefore, the fine powder is not mixed in the coarse powder and the classification degree is improved.

4 shows a separate embodiment other than the present invention, in which a plurality of flow direction adjusting blades 19 are attached to the rotating plate member 8 of the classifying apparatus of FIGS. The sorting device which attached the partition member 20 to the adjustment blade 19, and divided | segmented the classification chamber 10 into the vertical and multiple rooms is shown, and the vortex adjustment blade 19 is a vertically long plate-shaped member. Parallel to the rotary shaft 7 and on the rotary plate member 8 in the circumferential direction.

The partition member 20 is fixed to the vortex adjusting blade 19 by the outer edge so as to be coaxial with the rotational shaft 7 in a ring shape. Air containing the powder is drawn from the outer periphery of the central arc whirlwind and flows into the classification chamber 10. However, if the apparatus is enlarged, theoretically, ideal vortex is difficult to be generated. No matter how the distribution or the like is adjusted, vortex hunting may occur, and high-class classification will not be possible.

The fourth embodiment is particularly suitable for a large classifier, and can classify the raw materials with high or high accuracy. In other words, by using the vortex adjusting blade 19 and the partition member 20, in the large classifier as described below, it is possible to classify a large class of raw materials with high accuracy without generating vortex hunting.

The vortex adjustment blade 19 divides the inflow end surface of the classification raw material into longitudinal length blocks and flows into the same plane of the classification raw material in the classification chamber 10, but does not cause hunting and adjusts the classification point. The number of vortex adjusting blades 10 and the position of excretion on the rotary plate member 8 are set by the desired classification point, the size of the classifier, the rotational speed of the rotary plate member 8, and other circumstances. Generally, the classification point becomes finer as it is formed in the radially outer side of the rotating plate member 8.

That is, when the rotating plate member 8 rotates at the same speed, the centrifugal force is increased by the radially outer side and the vortex becomes strong. As the vortex is strong, the classification degree is increased, and the vortex is increased, and the classification degree is improved and the classification point is reliably divided by installing the vortex adjustment blade 19 on the radially outer side of the rotating plate member 8. .

5 to 7 show the arrangement of the vortex adjusting blades 19, respectively. As an example of FIG. 5, the vortex adjusting blades 19 are attached to the outermost side of the rotating plate member 8, and the classification points are smaller. Become.

In the example of FIG. 6, the vortex adjustment blade 19 is located inside the rotating plate member 8, giving an intermediate classification point. In the example of FIG. 7, the excretion position with respect to the rotating plate member 8 of the vortex adjusting blade 19 does not change from that of the example of FIG. 6, but in the case of FIGS. 5 and 6, the vortex adjusting blade 19 has an axis of rotation. While oriented to (7), the vortex adjustment blade 19 of FIG. 7 inclines with respect to the plane containing those rotation center axis | shafts and the axis | shaft of the rotation shaft 7.

In addition, this inclination angle is variable, and by selecting the inclination angle of the vortex adjusting blade 19, the vortex direction of the classification raw material is controlled, and the classification viscosity is set in combination with the setting of the vortex adjusting blade 19.

The partition member 20 partitions the outer periphery of the classification chamber 10 up and down, whereby the classification raw material descends by gravity and does not change the density of the classification raw material 10. At any point within the chamber, horizontal vortices of the classmates of substantially the same density are generated.

That is, the partition member 20 improves the classification degree by reducing the change in the partial velocity in the up and down directions of the vortex. The number of the partition members 20 is selected according to the classification point and the degree of classification. By mounting the partition member 20, the design of the classifier is easy to sufficiently cope with the constraints of the place, area, etc. of the classifier, even if the entire classifier is not too large for the throughput of the classifier. Sufficient classification is obtained and economical.

The classifier of the present invention having the above structure and action is particularly suitable for precisely classifying high-concentration raw materials with increased air volume after mill air vortex strengthening in the crushing section in the cement manufacturing process, but is not limited thereto. It can also be used for classification of raw materials.

That is, this classifier is equipped with a feed speed of the raw material, the angle adjustment of the guide vane 11, the rotation speed of the rotary shaft 7, the mounting of the vortex adjustment blade 19 and the partition member 20, the secondary air intake ( 5) The classifying point can be adjusted by the amount of air at the tertiary air inlet 18, and the longer body of the damper 15, and the synergistic effect by the proper combination of the classifying point operating conditions allows several 10 mu m. It is applied as a widely classified classifier of ˜1000 μm.

In the embodiment of FIG. 8, in the embodiment of FIG. 4, in the embodiment of FIG. 4, the separate horizontal center plate member 26 is fixed coaxially to the vertical rotating shaft 7 at the height of half the height of the classifying chamber 10, and the classifying chamber 10 is burned up and down. To separate. The rotating plate member 26 is fixed to the vortex adjusting blade 19 by the outer edge, and the rotating plate member 26 has a conical upper surface 27 with a gentle inclination like the upper surface of the rotating plate member 8 of the fourth illustration, It is designed to smoothly distribute and classify classified raw materials.

In the upper and lower chambers of the classification chamber 10, a ring-shaped horizontal partition member 20 having the same structure as that of FIG. 4 is formed. The rotating plate member 8 fixed coaxially to the lower end of the rotating shaft 7 is composed of a similar yoke 22 and a rim 23 as shown in FIG. 9, and the yoku 22 and a rim 23. The opening 24 is formed by ().

One end of the subdivision discharge pipe 21 is installed at the lower side of the rotating plate member 8 and the other end thereof is drawn out of the hopper 3. The subdivision discharge tube 21 communicates with the classification chamber 10 through the opening 24 of the rotating plate member 8, and the subdivision discharge tube 21 forms a charge damper 15A. In the embodiment of FIG. 8, the classified subdivisions in the classification chamber 10 are classified into upper subdivision discharge pipes 6 in the upper chamber of the classification chamber 10, and the lower subdivision discharge pipes 21 in the upper chamber of the classification chamber 10. Aspiration is discharged.

That is, a large coarse of mass is sent out of the classification chamber 10 due to the action of the centrifugal force generated by the rotation of the central rotating plate member 26 in FIG. 8, whereas the small fraction of the mass stays in the classification chamber 10. Only the subdivision is sucked into the subdivision discharge pipes 6 and 21 above and below the classification chamber 10.

In addition, the coarse powder coming out radially outward from the classification chamber 10 falls into the hopper 3 in the annular air gap of the outer lower end part of the vortex adjustment blade 19, and is subdivided by the air by the tertiary air inlet 18 at the same time. These subdivisions are returned to the classification chamber 10 again by negative pressure in the direction of the classification chamber 10 in the hopper 3, and then are taken out from the subdivision discharge pipes 6 and 21 again.

In this case, the classifying chamber 10 is divided into two parts up and down by the central rotating plate member 26, so that the height of each vane is about half of the height of the classifying chamber 10. Variation in the partial velocity in the vortex up and down direction is made smaller than in the case of FIG.

The embodiment of FIG. 10 is a circle surrounding the subdivision discharge pipe 6 on the upper surface of the cylinder body 2 of the embodiment of FIGS. 1 to 3, 4 and 8, and centering on the rotation axis 7. Four raw material inlets 28 are formed at intervals of the columnar shape, for example.

The horizontal dispersion member 29 is fixed to the rotating shaft 7 at the top of the classification chamber 10, and the injection member 29 is fixed to the central axis 7 at the center, and the dispersion member 29 is A cylindrical portion 32 coaxially formed on the boss 30 by the boss 30 and the yoku 31 in the center, and a radial outwardly from the lower end of the cylindrical portion 32. It has a ring-shaped dispersion plate part 33 which protrudes.

The central portion of the dispersing member 29 has a large opening 34 for communicating the classification chamber 10 with the subdivision discharge pipe 6 and the like except for the boss 30 and the yoku 31. (Figure 11)

The cylindrical portion 32 has an inner diameter substantially the same as the inner diameter of the subdivision discharge pipe 6 and has a height in which the plate portion 33 is separated from the upper wall of the cylindrical body 2 by a predetermined distance and at the same time the raw material inlet 28. The classification room 10 is blocked.

The plate part 33 extends to the lowest region of the opening 35 in the barrel main body 2 at the lower end of the raw material inlet 28, receives the raw material falling from the raw material inlet 28, and the raw material is directly classified into a classification chamber ( 10) Do not flow inside.

An inner surface 37 of the conical large buffer member 36 surrounds the cylindrical portion 32 and the plate portion 33 of the dispersing member 29 with the rotary shaft 7 on the lower surface of the upper surface of the cylindrical body 2. It is fixed coaxially.

The powder raw material introduced at the raw material inlet 28 falls on the plate portion 33, but the dispersion member 29 is dispersed by rotating with the rotary shaft 7, and the classification chamber at the conical inner surface 37 of the collision member 36. The direction of flow so as to face inward of (10) is changed to merge with the air-raw mixture introduced from the air-raw inlet 4 and to increase the processing capacity of the apparatus.

In the embodiment of FIG. 12, the subdivision discharge pipe 21 is formed coaxially under the rotary plate member 8 without forming the subdivision pipe 21 at the upper end center of the tube body 2, as shown in FIG. It is withdrawn. The subdivision discharge pipe 21 is provided with a charge damper 15A having the same structure as the damper 15.

In order to connect the classification chamber 10 and the subdivision discharge pipe 21, the yoku 22 and the rim 23 were left in the rotating plate member 8, and the other part was made into the opening 24. As shown in FIG. (Fig. 13)

The raw material inlet 25 through which the rotating shaft 7 communicates with the upper end of the cylinder main body 2 protrudes upwards.

In addition, the outer periphery of the disk-shaped dispersion member 29A is fixed to the upper end of the vortex adjusting blade 19 at a predetermined distance from the lower surface of the upper wall of the tube body 2, and the inner surface of the disk-shaped collision member 36 is a dispersion member. It is fixed to the upper wall lower surface of the cylinder main body 2 so that the outer periphery of 29A may be carried out, and raw material dispersion like FIG. 8 is performed.

In order to increase the treatment capacity of the apparatus by increasing the mixing ratio of the powder raw material-air mixture fed to the lost class 10 at the air-raw inlet 4, the raw material inlet 25 is added as a blend having the main raw material. can do.

The classified raw material is sucked and discharged from the subdivision discharge pipe 6 through the opening 24 of the rotating plate 8 in the classification chamber 10, and the same effect as in the case of FIG.

On the other hand, in the embodiment of Figs. 10 and 12, the raw material is introduced at the raw material inlet 28 or 25 without using the air-raw inlet 4, and the normal classification, that is, the classification of the milling raw material There is also an advantage to it.

Below shows an example of the use of the classifier according to the present invention,

[Example 1]

When the granulated cement powder of the final mixture collected by air vortex under cement was used as the classification raw material, the particle size distribution is shown in the first table.

[Table 1]

The shape of the classifier of the present invention used for the experiment is 1 to 4, and the classification chamber diameter (outer diameter of the rotating plate 8) is 1.600 mm, and the classification chamber height (upper surface of the tube body 2 from the upper surface of the rotating plate 8). Height), 1,000 mm, the angle of which is used to install 60 guide blades 11 of width 50 mm that can be changed freely, and used as a reference as a normal cyclone of the inner cylinder body of 1.800 mm .

If the setting condition and operation condition are displayed in the second table,

[Table 2]

The operating conditions were classified as A1 B1, C1, D1, E1, supplying classified materials 2B t / h, powder concentration 0.57㎏ / ㎥, so that the target value of 100μm finishing residue was about 100%. .

In the second table, [out] means that the vortex adjusting member 19 is attached to the end of the rotating plate 8, and [medium] means that the inside of the rotating plate 8 is mounted slightly inward.

The centrifugal effect value was calculated as V ² T / rg, where V _T : circumferential velocity, r: distance from the center of the classification chamber, and g: acceleration of gravity. The rotation direction of the rotating plate 8 is the same direction as the flow of air (clockwise rotation in FIG. 1).

The recovery to the subdivision side of 100 µm dead bottom and the 100 µm mapping residue of the subdivision are the same as in the third display.

[Table 3]

[Example 2]

As the classification raw material, coarse-grained cement powder recovered by air vortex under cement was used.

[Table 4]

The classification apparatus of the present invention used for the experiment is the embodiment of FIG. 10 applied to the ones shown in FIGS. 1 to 4, and the other specifications are the same as those of [Example 1].

As a reference example, a distributed air separator, that is, a cyclone-type air separator, which is generally used in the cement industry, is one having a classification chamber diameter of 3,800 mm. The setting conditions and operating conditions are shown in Table 5.

[Table 5]

The operating conditions were classified as A2, B2, C2, D2, and E2 so that the classifier powder concentration was 1.1 kg / m 3, and the target value of the 100 µm fine residual fraction was about 1.0%.

The second raw material supply amount is 160 t / h.

The raw material supply amounts M and N are the supply amounts at the air-raw material inlet 4 and the raw material inlet 28, respectively.

The 6th table shows the recovery rate to the subdivision side of 100 micrometers underneath, the 100 micrometer mapping residue of a subdivision, and the division ratio to a coarse side.

[Table 6]

14 and 15 show the classification characteristics of [Example 1] and [Example 2], respectively, the horizontal axis showing the particle diameter, and the vertical axis indicating the distribution ratio (percentage ratio) of the subdivisions.

Here, the distribution ratio to the subdivision side indicates the ratio of the amount of the subdivision belonging to each particle size division after the classification of the raw material into subdivisions, coarse fractions, etc., and the recovery rate to the subdivision side.

As can be seen from FIGS. 14 and 15, the classifiers A1, B1, C1, D1 and A2, B2, C2, D2, of the present invention are all compared to the cyclone E1 or the cyclone type of the separator E2. Classification Characteristic This indicates that the inclination of the polarity of the polarity has been sharpened to achieve a high degree of classification, and the recovery rate of the subdivision is excellent, and there is no infiltration of the granulator. The degree of classification and classification efficiency is not known that it is a good classification device.

The classifiers A1, B1, C1, D1 and A2, B2, C2, D2 are not uniform because of different classification conditions, but they are not uniform. However, vortex adjustment pieces, classification errors and tertiary air are blown in. Maximum performance is displayed in D1 and D2.

To summarize the present invention below,

First, in the description, a passage including a cylindrical cylinder body and a hopper formed at the bottom of the cylinder body, a sub-discharge pipe formed at the center of one end of the cylinder body, an air raw material inlet protruding tangentially from the cylinder body, and the cylinder The rotating shaft which is coaxially stretched in the main body, the distribution of the powder raw material fixed coaxially in the barrel main body, the rotary plate member for classifying common use, and the air-body raw material formed by separating the circumferential direction in the barrel main body into the barrel body Classification apparatus equipped with guide vanes, etc. for introduction;

Secondly, the classification apparatus according to the first description, further comprising a vortex adjustment blade fixed to each rotating member in the aforementioned barrel main body and disposed at substantially equal intervals in the circumferential direction of the rotating plate member in parallel to the aforementioned rotating shaft;

Thirdly, the classification apparatus of the second substrate, which further includes at least one ring-shaped horizontal partition member fixed coaxially to the rotating shaft in the aforementioned vortex adjustment blade in the aforementioned cylinder body;

Fourth, the above-mentioned subdivision discharge pipe is formed in the center of the upper wall of the above-mentioned barrel main body, and the rotary plate is the classification apparatus of any one of the first to the third located at the boundary between this barrel main body and the hopper,

Fifth, the other subdivision tube is formed coaxially to the rotary plate or to the outside of the hopper below the rotary plate member, and the rotary plate member is provided with a classification apparatus of the fourth substrate having an opening for communication between the tube body and the other subdivision discharge pipe. ,

Sixth, the classification apparatus of the fifth substrate, the other horizontal rotating plate member is fixed coaxially to the rotating shaft on the upper side of the rotating plate member,

Seventh, the classification apparatus of the sixth substrate, which is fixed to each rotating plate member in the barrel main body, and further including the vortex adjusting blades disposed parallel to the rotation axis and spaced in the direction of the circular rotation of the two rotating plate members;

Eighth, the classification apparatus of the seventh substrate, further comprising at least one ring horizontal diaphragm member fixed to the rotation axis and the coaxial vortex adjusting blade in the upper and lower space angles of the other rotating plate member of the barrel body;

Ninth, the raw material inlet is formed on the upper wall of the barrel main body at substantially equidistant or equidistant intervals from the rotation axis to disperse the raw material radially outward of the barrel main body in the lower region of the raw material inlet in the barrel main body. Any of the first to ninth classifiers of which the horizontal circular ejection member is fixed to the rotating shaft;

Tenth, a ninth substrate classifying apparatus in which a collision member having an inner surface of a truncated cone shape is formed in the barrel body;

Eleventh, the subdivision discharge pipe is formed coaxially with the rotary plate member at the lower side of the rotary plate member and directs out of the hopper, and the rotary plate member forms an opening for communicating the cylinder body with the subdivision discharge pipe, and forms a raw material inlet at the center of the upper wall of the cylinder body. In addition, the plate-shaped horizontal dispersion member is a classifier of the second substrate fixed to the top of the vortex adjustment braid coaxially to the rotation axis;

A twelfth classifier that surrounds the dispersing member and has reshaped a collision member having a conical inner wall,

Thirteenth, a classification apparatus according to the twelfth aspect, which further includes at least one ring-shaped horizontal partition member fixed coaxially to the rotational axis to the vortex adjustment blade in the barrel body;

Fourteenth, the rotating plate member is any one of the first to thirteenth having a conical top surface, the classification apparatus of the substrate,

Fifteenth, the classification apparatus of the base material, which is the first to fourteenth in which the charge damper is formed in the subdivision discharge pipe;

The sixteenth, the guide vane is any one of the first to fifteenth angles of inclination variable, and the classification apparatus of the substrate,

The seventeenth, classifying apparatus of any of the first to sixteenth apparatuses having the secondary air inlet protruding in a tangential direction from the part opposite the air raw material inlet of the main body;

Eighteenth, any of the first to seventeenth having the tertiary air inlet protruding from the hopper can be summarized by the classifier of the description.

Claims (1)

A cylinder 1 including a hollow cylindrical cylinder body 2, a hopper 3 formed at the lower end of the cylinder body 2, a subdividing pipe 6 formed at the center of one end of the cylinder body 2; , An air raw material inlet 4 protruding tangentially from the barrel body 2, a rotating shaft 7 coaxially stretched in the cylinder powder 2, and fixed coaxially in the cylinder body 2. Guidance blades for introducing into the cylinder body 2 the rotary plate member 8 for dispersing and classifying the divided powder raw materials and the air-powder raw material formed in the cylinder body 2 at intervals in the circumferential direction thereof. Classification apparatus characterized in that it is provided with).

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