JPS59196756A - Fine grinding device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a pulverizer.

As shown in FIGS. 1 and 2, the conventional pulverizer IT supports a cylindrical rotor 2 having a large number of protrusions 1 along the generatrix of the outer surface on a rotation 11113, and A stator 6 is fitted with a stator 6 having a gap 4 between the rotor 2 and a large number of protrusions 5 along the generating line of the inner surface. The object is supplied and the rotor 2 rotates at high speed to crush the particles of the object to be crushed.

In the process of crushing the material to be crushed, the material to be crushed is supplied from the supply port 8 provided in the bottom plate of the lower casing 7 which is connected to the lower end of the stator 6 by operating a suction blower (not shown) connected to the product discharge port 12. The particles are sucked into the lower casing 7 along with air, and are caused to flow along the inverted conical inner surface of the lower casing T by the airflow generated by the fc & stirring blades 9, which are fixed to the lower surface of the rotor bottom plate that rotates together with the rotor 2 at high speed. The rotational force of the rotor 2, which is pushed up into the crushing chamber formed between the rotor 2 and the stator 6, increases the speed and the stator. 6 and crushed by impact with the convex part 1 of the trochanter 2, and then crushed once between the convex part 1 of the rotor 2 and the convex part 5 of the stator 6 to make it finer. While being pulverized, it is carried upward on the upward spiral air DI generated by the high speed rotation of the rotor 2, and sent into the upper casing 10 connected to the upper end of the stator 6,
This is rotated along the inner circumferential surface of the upper casing 10 by a centrifugal blade 11 fixed to the upper surface of the rotor upper plate which rotates at high speed together with the rotor 2. The product is extracted from the product outlet 12 and introduced into a bag filter (not shown), where the finely pulverized product and air are separated.The air is exhausted via a suction blower, and the finely pulverized product is passed through the bag filter. It is sent to a hopper and stored there.

By the way, in the above-mentioned pulverizer, the gap 4 between the rotor 2 and the stator 6 is generally 2 to 5 mm or more, which is wide.

b) The strength of the vortex generated in the concave Mix 5 a of the rigid 2-piece 6 is weak.

Mouth) The probability of the rotor 2 hitting the particles of the object to be crushed is small.

c) The impact force exerted by the rotor 2 on the particles to be crushed is small.

There are drawbacks such as:

In addition, in the crushing chamber formed by the rotor 2 and stator 6, air passes through the concave gap 4 of the rotor 2 and the concave portion 5a of the stator 6, and the particles of the material to be crushed are The air, that is, the upward spiral airflow, passes through the grinding chamber, but since the rotor 2 is rotating at a high speed, almost no particles of the object to be ground pass through the concave portion 1a of the rotor 2. Therefore, the particles to be crushed pass through two places: the gap 4 and the recess i5a of the stator 6. However, the convex portion 5 of the stator 6. Since the cross-sectional shape of the concave m5a is close to a rectangle, the concave M5a of the stator 6
At B5a, air flows from below to above while forming a high-turning vortex as shown in FIG. Among the particles of the material to be crushed that are caught up in this vortex, some collide with the wall surface of the recess 5a, and are also discharged from the recess 5a into the gap 4, where they are subjected to a strong beating action by the convex portion 1 of the rotor 2. Pulverization progresses due to the grinding action of the entire bridge and the protrusion 5 of the stator 6.

However, there is a drawback that some of the particles to be crushed are not crushed as described above, but are drawn into the vortex, ride on the vortex of the trench, and come out of the crushing chamber from the upper end of the recess 5a.

Therefore, the average particle size of the pulverized product produced by such a pulverizer differs slightly depending on the particles to be pulverized, but for example, it can be only bOμm for polished rice and 40μm for toner, which is difficult to say that it is sufficiently pulverized.

It was not possible to obtain a finely pulverized product on the order of microns to several microns.

Furthermore, in the conventional pulverizing device, the fine powder in the finely pulverized product that is pulverized in the pulverizing chamber formed between the rotor 2 and the stator 6 may aggregate in the upper coosong 10, or the fine powder may become coarse particles. The finely pulverized product is of poor quality because it is discharged from the product discharge port 12 while adhering to the product.

1. The conventional pulverization equipment is:

b) Rotor 2 rotates at high speed.

口）Limit the amount of air passing through the grinding chamber in order to reduce the particle size of the crushed product.

For these reasons, the air exhaust temperature increases and the temperature of the stator 6 locally increases. As a result, depending on the type of particles to be ground, it may not be possible to grind them, and there are cases where even though it is possible to grind them, the pulverized product will undergo thermal changes, which is not desirable. For example, toner or synthetic resin has a low softening point.

9 Thermogenic substances such as coffee powder, glucose, and certain pharmaceuticals undergo thermal changes. As shown in FIG. 4, a supply port 14 for the particles to be crushed is provided in the middle of a cooling air introduction pipe 13 provided on the bottom plate of the lower casing I connected to the lower end of the stator 6. An air cooler 15 is connected to the tip of the cooling coil 1 of the air-cooled lamp 15.
The inlet of 6 and the mouth of the refrigerator 17 are connected with a pipe 18,
The cooling coil 160 and the inlet of the refrigerant tank 19 are connected to the piping 2o, and the outlet of the refrigerant tank 19 and the refrigerator 170 are connected to the piping 2 with the pump 21 in the middle.
It is connected in 2. 23 in the figure shows rotor 2 at 1 speed.
With the iTo motive that rotates to 0, it runs on the belt 24 and rotates the rotating shaft 3.
It is designed to rotate. 25 is a bug filter.

The inlet is connected to the tip of a discharge pipe 27 connected to the pulverized product discharge port 12 of the pulverizer.

An exhaust pipe 29 having a suction blower 28 in the middle is connected to the outlet of the bag filter 25.

The air introduced into the pulverizer together with the particles to be pulverized is
The air passes through the air cooler 15 and is cooled down to the required temperature by the cooling coil 16.

However, with this type of cooling of the introduced air, although the exhaust temperature can be suppressed to a desired temperature, it is not possible to suppress the local temperature rise of the stator 6.

The present invention has been developed in view of the above six circumstances, and it burns the particles of the material passing through the grinding chamber in the curve of the rotor and the hardener, thereby ensuring a reliable and sufficient pulverization effect. It is possible to increase the grinding drive and to disperse and classify the finely ground particles to obtain a finely ground product with a good crystal TJ and an extremely narrow particle size range on the micron order.In addition, it is possible to suppress the exhaust temperature of the finely grinding device. We provide a pulverizing device that can suppress the local temperature increase of the stator and can pulverize particles with a low softening point or heat-resistant particles without any problems. This is what I am trying to do.

An embodiment of the pulverizing apparatus according to the present invention will be described below with reference to the drawings. In FIG. This is a finely pulverized particle classification section.

The pulverizing part 30 is supported by a rotating shaft 3', and as shown in FIG. A gap 4' exists between the stator 6' and the stator 6'. The inner surface of the stator 6' has a substantially triangular concave portion 34 and a convex portion 35 as shown in FIG.
are formed into a continuous tooth shape, one side 34a of the recess 34 of the tooth shape is directed toward the center of the rotor 2' and has a length of about 1 to 5 m, and the other side 34b of the recess 34 is oriented toward the tangent to the rotor 2'. The included angle between one side and the other side of the recess 34 is
The angle is 45 to 60 degrees.

An arcuate surface 35a is formed at the tip of the convex portion 35, and the arcuate surface 35a is centered on the axis of the stator 6', and the width of the arcuate surface 35a is about one thigh. At the upper end of the inner circumferential surface of the stator 6', there is a classification ring 36 that closes the recesses 34 as shown in FIGS. 8a and 8b.
are provided integrally or detachably. Since the classification ring 36 may completely fill the recess 34, the difference δ between its radial width and the length of the protrusion 35 may be zero. The single-stage classification ring 36 may be provided on the intermediate circumferential surface of the stator 6' as shown in FIGS.

It would be good to have three stages... Furthermore, the classification ring 36 may be divided and arranged in a plurality of stages at different stages in the circumferential direction.

As shown in FIG. 5, the to-be-pulverized particle supply section 31 includes stirring blades 9' provided on the lower surface 2a of the bottom plate of the trochanter 2'.
, an inverted conical lower coussing provided at the lower end of the stator 6' to cover the stirring blade 9', and an introduction of air and particles to be crushed provided to the bottom plate 7a of the lower gland casing 7'. It consists of v13' and L.

The finely pulverized particle dispersing section 32 includes a centrifugal blade 37 provided on the outer periphery of the upper plate 2b of the rotor 2', and
It forms an inverted conical casing 38 provided at the upper end of the stator 6' correspondingly, and a space 39 is provided between the two.

The finely pulverized particle classification section 33 includes a classification rotor 41 having a rotation speed of 11" and a medium-heat through hole 4LNt provided at the upper end of the blade 37, and the inverted conical cooler 7 corresponding to the classification rotor 41. Coarse powder discharge port 42' is provided at the upper end of the rotor 2' in a tangential direction opposite to the rotational direction of the rotor 2'! The classification casing 43 has an upper lid casing 46 which is provided at the upper end of the classification casing 43 and has a fine powder discharge port 44 in the center which is fitted into the through hole 40 of the rotor 41 at the base end. The classification rotor 41 includes an upper disk 41a at the upper end of the centrifugal blade 37, a large number of classification plates 41b, 12 in this example, which are provided radially in the circumferential direction on the upper disk 41a, as shown in FIG. The classification disk 41c is provided at the upper end of the classification plate 41b and has the through hole 40 in the center.

A cooling jacket 47 is provided on the outer periphery of the stator 6'.
The cooling coil 16 in the fc air cooling 615' is provided at the inlet at the lower end of this cooling jacket 47 and at the tip of the introduction pipe 13' on the bottom plate of the lower casing 7' shown in FIG.
The outlet of the cooling jacket 47 and the inlet of the refrigerant tank 19' are connected by a pipe 48, and the outlet of the cooling jacket 47 and the inlet of the refrigerant tank 19' are connected by a pipe 48.
9, the outlet of the refrigerant tank 19' and the refrigerator 17
' is connected to the inlet of ' by a pipe 22' equipped with a pump 21' in the middle. Cold 1m1r' state mouth and air cooler 1
5' is connected to the inlet of the cooling coil 16' through a pipe 18'.

11 In Figure 23'U1f motive, Held 24'? Traveling and rotating shaft 3'? It is designed to rotate.

25' is a discharge pipe 27' to the coarse powder discharge port 42. This bag filter 25' is connected via t'Lfc bag filter.
On the way out of O, there was a suction feed Km28'! ``jru exhaust pipe 2
9' are connected. A bag filter 50 is connected to the fine powder outlet 44 through a discharge pipe 51, and an exhaust '1f 53 having a suction blower 52i is connected to the outlet of the bag filter 50. Reference numeral 54 denotes a feeder that feeds particles of the material to be crushed to a supply port 14' provided in the middle of the introduction pipe 13'.

Next, the pulverizing action of the particles to be pulverized by the pulverizing apparatus of the present invention constructed as described above will be explained. Driven by the electric +fi 23' shown in Fig. 11, the bell) travels 24''k, sends low temperature refrigerant to the rotating shaft 3'kA speed rotation 16', and cools the air introduced into the air cooler 15'. O~5C
Assuming the low temperature air, this? The particles to be crushed are sucked and introduced into the lower goose song 7' through the introduction pipe 13', and from the feeder 54. The particles to be crushed are fed into the supply port 14' in the middle of the introduction pipe 13', and the particles to be crushed are continuously supplied to the introduction pipe 13' from the supply port 14'.
Introduced into a circle. The particles to be crushed introduced into the lower cooler 77777 are stirred by stirring blades 9' provided on the lower surface of the bottom plate 2a of the rotor 2' which rotates at high speed together with the rotating shaft 3' shown in FIG. The airflow rises along the inverted conical inner surface of the lower casing γ′ and enters the grinding chamber formed between the rotor 2′ and stator 6′, where all the particles are pulverized. Effect? Accordingly, micron order to 10
It becomes finely pulverized particles with a narrow particle size range of several microns and exits the grinding chamber.

The details of the pulverizing action of the particles to be pulverized in the pulverizing chamber will be explained with reference to the related structure of the rotor 2', the stator 6', and the classification ring 36.

Generally speaking, when considering the air surrounding a rotating body, the air adhering to the surface rotates at the same speed as the circumferential speed of the rotating body, whereas the air at a distance from the surface rotates at the same speed as the circumferential speed of the rotating body. The greater the distance, the greater the delay in the circumferential speed of the rotating body (force), and the smaller the speed. However, considering the concave portion 34 of the stator 6', a vortex is induced in this portion as shown in FIG. The rotational speed of the vortex is proportional to the circumferential velocity υ of the air along the opening surface of the recess 34.

Therefore, the larger the gap 4' between the rotor 2' and the stator 6', the smaller the circumferential speed υ of the rotor 2'. 〃
・The rotation speed of the vortex decreases. Conversely, the smaller the size of the gap 4', the higher the rotational speed of the vortex. The particles of the material to be crushed that are caught up in the vortex collide with the wall surface more strongly as the rotation speed of the vortex increases, and the particles with smaller diameters also collide with the wall surface as the rotation speed of the vortex increases. The particles of the material to be ground are well ground.

In addition, the probability of impact by the rotor 2' on particles to be crushed that have come out from the vortex in the fourth part 34 into the gap 4' is calculated by the dimension h5 of the gap 4', the particle diameter d of the particles to be crushed, the convex portion of the rotor 2'. If the number of protrusions 1' is n, then P C < h The impact pulverization of the particles of the object to be pulverized below the rotor 2' is efficiently performed.

Furthermore, the particles of the object to be crushed which come out from the recess 34 of the stator 6' to the gap 4' are accelerated by the air ηt flowing through the gap 4'. In this case, the larger the gap 4' is, the longer the particles are struck by the rotor 2', and the relative velocity between the particles and the rotor 2' during striking is smaller. The impact force of the particles by the rotor 2' becomes l''.
Since the size of the gap 4' is extremely small, less than one word, the time during which the particles are hit by the rotor 2' is shortened, so the relative speed between the particles and the rotor 2' during the impact is large. Therefore, the impact force on the particles by the rotor 2' increases.

Therefore, the particles of the material to be crushed are reliably hit.

Now, since the shape of the four parts 34 of the stator 6' is approximately triangular as described above, the air flow in these four parts 34 is the first.
As shown in Figure 2 (a, a', a"...and D @ b r
b', b") Divide into two 7l-tl. ib, b
'.

The particles of the object to be crushed -1: caught in bl+... collide with the wall surface and are crushed in substantially the same manner as in the case of the conventional rectangular recess 5a (see FIG. 3). And riding the whirlpool part 3
One side 34aK of 4 advances to the tip B of the convex part 35, leads to the gap 4', and at this part connects to the convex part 1' of the rotor 2'↓
P-Blow is received and crushed. A similar action occurs in the recess 34, l! of the next stator 6'. ! Convex portion 1' of 1 trochanter 2'
The pulverization progresses one after another. -10,000 Air flows a, a that almost never occur in the case of the conventional rectangular recess 5a
', a''... The particles to be crushed are transported to the concave part 3
The other side 34b of 4 passes through to the tip A of the convex part 35, is led to the gap 4', and at this part the convex part 1' of the 11 trochanter 2'
Ef blow? It is received and crushed. At the same time, the particles subjected to the impact crushing action further collide with the other side 34bK of the recess 34 and are crushed. Then, the same action is applied to the four parts 34 of the next stator 6', and as a result, the crushing progresses one after another.
Compared to the case of the conventional rectangular recess 5a, the impact by the rotor 2' is made not only at point B but also at point A, so the probability of impact is increased, and the particles of the object to be crushed are finely and efficiently reduced. It will be crushed.

However, on the inner circumferential surface of the stator 6', there are
As shown in Figures a and b, a classification ring 36 is provided that partially or completely closes the concave portion 34, so that the particles to be crushed are separated from the concave portion by 5 yen as in the conventional case. Riding on the vortex of high rotational speed (see Figure 3), all the particles are removed from the grinding chamber at once, and due to the classification action of the classification ring 36 (described later), the residence time of the particles to be ground in the grinding chamber is reduced. As the time length increases, the concentration of the particles to be crushed in the crushing chamber increases. If the residence time is that long, will only the sled be crushed? The probability of being affected increases, and finely pulverized particles can be obtained. Moreover, when the concentration of the particles of the object to be crushed increases, the probability of collision between the particles of the object to be crushed becomes high, and the crushing action is promoted. These two acting forces ensure that the particles to be ground are pulverized. The particles that are thus finely pulverized are carried by the airflow and exit into the gap 4' directly below the classification ring 36 because the centrifugal force due to the rotation of the rotor 2' and K is acting here. Particles larger than a certain size are pushed back into the recess 34 of the stator 6'. Do the pushed back particles have a crushing effect again?
The particles cannot pass through the classification ring 36 until they are below a certain size. Therefore, the particles to be crushed are sufficiently pulverized. 01] The above-mentioned gap 4' of 1 m or less, and the rotor 2 such that the - side 34a faces the center and the other side 34b faces the rotating rotor 2'.
' and both sides 34a.

The synergistic action of the numerous approximately triangular recesses 34 on the inner surface of the stator 6', in which the included angle α of 34b is 45 to 60 degrees, and the classification ring 36 provided on the inner circumferential surface of the stator 6' The effect is L9, which results in finely pulverized particles of the order of 10,000 mils or more. The temperature rises as it moves. In principle, the temperature rises uniformly from below to above, but the temperature rises uniformly from below to above.
4-0 It is unavoidable that the concentration of the particles to be crushed becomes locally high, and therefore a local temperature increase of the particles to be crushed and the introduced air occurs.

In order to suppress these temperature increases, the pulverizing apparatus of the present invention not only cools the air introduced into the pulverizing chamber together with the particles to be pulverized through the total air cooler 15' and into the cooling coil 16'. Cooling coil 16'? The sound of the refrigerant that has passed through the cooling jacket 47 is passed through the gap 4' and the four parts 34 of the stator 6', and the particles of the crushed material are exchanged with the refrigerant in the cooling jacket 47 through the stator 6' valve. I'm letting you do it.

This heat exchange is possible because the gap 4' is extremely small, less than one word.
It has a large heat transfer coefficient, is extremely efficient, and has a remarkable cooling effect. Therefore, compared to the conventional cooling power method that only introduces cooling air, it is not only possible to more easily suppress the temperature rise of the air and the particles to be crushed, but also to suppress the local temperature rise of the stator 6'. be able to.

The finely pulverized particles of the order of microns to tens of micrometers that have passed through the above-mentioned pulverizing chamber are transported by centrifugal blades 37 shown in FIG.
The 19 particles are well dispersed without agglomeration due to the high speed rotation of the casing 38, and are carried onto the inner surface of the inverted conical casing 38 and carried by the outward swirling air current to the circular surface of the classification goo 777430.

Further, the fine powder on the order of 1 micron adhering to the coarse powder on the order of 10 microns in the finely pulverized particles is separated by the high speed rotation of the centrifugal blade 37 on the way to the inner space of the classification casing 43. Then, the finely pulverized particles are conveyed to the classification rotor 41 1j by the high-speed rotating classification rotor 41, generated by the circular swirling air current, and are classified by the classification rotor 41, where only fine powder on the order of microns is transferred to the classification plate. 11 habits of 41b? The air flow passes through the fine powder outlet 4471 and the VC'J
The water is discharged, passes through the discharge pipe 51, and is introduced into the filter filter 50. Here, it is separated into fine powder and air, and the air is exhausted through an exhaust pipe 53 via a suction blower 52, and the fine powder is sent from a nog filter 50 to a not-shown hub and stored as a finely pulverized product. Ru. The coarse powder classified by the classification rotor 41 is blown off by the classification plate 41b and is splashed on the inner surface of the classification casing 43, rotating in the same direction as the rotation direction of the classification rotor 41. Coarse powder is discharged from the 42-powder outlet along with the airflow, l) ljj
'Ku 27'? and is introduced into the bag filter 25'.

Here, the coarse powder and air are separated, and the air is exhausted through an exhaust pipe 29' through a suction blower 28', and the coarse powder is sent to a bag filter 25' and a honbar (not shown). stored.

The pulverizing device according to the present invention is shown in FIG. This fine grinding device has a product discharge port 12' and a bag filter 25'. A classifier 55 is provided in the middle of the connected discharge pipe 27', and a coarse powder discharge port 56 of the classifier 55 and a material supply port 14' for crushed material provided in the middle of the introduction pipe 13' of the lower casing 7'. are connected through a pipe 57, and a fine powder discharge port 58 of the classifier 55 is connected to a bag filter 25' through a discharge pipe 27'. The rest of the configuration is the same as that in FIG. 11, so a description thereof will be omitted.

According to this pulverizer, coarse powder and a part of fine powder are classified by the pulverized particle classifier 33 and discharged together with air flow from the coarse powder outlet 42, and enter the classifier 55 through the discharge pipe 27'. The fine powder of 0 and 10,000, which is classified into fine powder on the order of microns and coarse powder on the order of 10 microns, is discharged from the fine powder outlet 58) and passes through the discharge pipe 27' to the bag filter 25'.
Here, the fine powder and air are separated, and the air is exhausted through a suction blower 28' and an exhaust pipe 29'.
The fine powder is sent from the bag filter 257 to a not-shown hopper and stored therein. Other power)■ Powder has 56 coarse powder discharge ports.
Raise 'Kf 57 k: i Output temporarily crushed material supply port 14
' and supplied to Hirojin W-13', feeder 5
4. The material to be crushed is fed into the supply port 14' and the inlet pipe 13'
Together with the new particles of the material to be pulverized, the pulverized particles are introduced into the lower Cushing A' along with the cooling air, and are again pulverized in the pulverizing section 30. Therefore, in this pulverizer, 1
A finely pulverized product containing only fine powder with an extremely narrow particle size range on the order of microns, without containing coarse powder of several microns or more, can be obtained.

As can be seen from the above explanation, the pulverizing device of the present invention has a special shape on the inner surface of the stator of the pulverizing section and a gap between it and the rotor. ] Since the width is extremely narrow (less than 1-1 embryo), the particles of the object to be ground can be reliably, sufficiently, and efficiently pulverized, and furthermore, the pulverized particles can be dispersed into 9 classifications. Therefore, it is possible to easily produce a finely ground product of good quality with an extremely narrow particle size range of micron oats in a long time.

Especially finely ground particles? Coarse powder on the order of 1υ several microns obtained by classification? Return it and finely grind it again.
Only finely pulverized products with an extremely narrow particle size range on the order of microns can be obtained.

Furthermore, the pulverizing apparatus of the present invention cools the air introduced into the pulverizing base circle together with the particles to be pulverized, and has an exhaust gas level. It's not just something that can be suppressed, but a local temperature rise in the stator that was previously impossible? Therefore, even particles of a material to be ground with a low softening point can be smoothly ground without becoming impossible to grind, and even particles of a material to be ground of a mildly heat-sensitive substance can be pulverized without undergoing thermal changes. Furthermore, since the introduced air and the stator can be cooled by one cooling device, the cooling efficiency is extremely high and the operating cost is low and economical.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view showing a conventional pulverizer, and Figure 2 is a vertical cross-sectional view of a conventional pulverizer.
3 is a partially enlarged sectional view taken along the line 1-1 in the figure; FIG. Fig. 4 is a system diagram showing another conventional pulverizing device, and Fig. 5 shows the main parts of the pulverizing device of the present invention.
FIG. 6 is an enlarged sectional view taken along line nu in FIG. Parts a and b showing the assembly are a partial perspective view and a partial vertical cross-sectional view showing the classification ring provided on the intermediate inner circumferential surface of the stator, and Figure 410 is an enlarged view taken along line m-IIi in Figure 5. 11 is a system diagram showing the entire structure of the pulverizing device of the present invention, and FIG. 12 shows the pulverizing effect of the particles of the object to be pulverized due to the relationship between the four parts on the inner surface of the stator and the convex parts on the outer surface of the rotor. For explanation: An enlarged view of Figure A3.7, and Figure 13 is a system diagram showing another pulverizer of the present invention. ...Rotating shaft 41...Gap 6'...Stator 7'...
・Lower gauging 9′... Stirring blade 13′・
...Introduction pipe 14'...Supply port 15'...Air cooler 16'...Cooling coil 17'...
Refrigeration) E 18'... Self-pipe 19'... Refrigerant tank 22'... Piping 2 b'=-bald filter 21'... Discharge pipe 30... Fine grinding section
31...Particle supply part for the pulverized material 32...Finely pulverized particle dispersion part 33...G pulverized particle classification capital 34...Approximately crescent-shaped recessed part 34a...One side of the recessed part 34b...
Other side of concave portion 35...Convex portion 36...Classifying ring 37...Centrifugal blade 38...Inverted conical gauging 4υ...Through hole 41...Classifying rotor
42... Coarse powder outlet for classification gauging 43... Classification gauging 44... Fine powder outlet for upper lid gauging 46... Upper lid gauging 47... Cooling jacket 48. 49... Piping 55... Classifier 5
6... Coarse powder discharge port 57 of the classifier... Power distribution Applicant Kawasaki Heavy Industries Co., Ltd. Agent Yuji Masuji Tsutsu Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 (a) Figure 8 Figure (b,) Figure 9 (Q) Figure 10

Claims (2)

[Claims] (1) A stator is fitted with a gap of lll1l++ or less between the rotor, which is supported by a rotating shaft and has a large number of convex portions along the generatrix of the outer surface, and the inner surface of the stator is approximately A triangular concave part and a convex part are formed into a continuous tooth shape, and one side of the concave part of the tooth is directed toward the center of the rotor, and the other side of the concave part is directed in the tangential direction of the rotor. The included angle is 45 to 60 degrees, and at least one classification ring is provided on the inner circumferential surface of the stator to block some or all of the four parts,
A pulverizing section provided with a cooling jacket on the outer periphery of the stator, stirring blades provided on the lower surface of the bottom plate of the rotor, and an inverted conical shape provided at the lower end of the stator to cover the stirring blades. a supply section for particles to be crushed, which comprises a lower casing of the rotor and an inlet tube for air and particles to be crushed provided on the bottom plate of the lower casing; an imitation rice grain θ/particle dispersion section consisting of a blade and an inverted conical casing housed in the upper end of the stator corresponding to the centrifugal blade; and a through hole in the center provided at the upper end of the centrifugal blade. a classification rotor, a classification casing that is provided at the upper end of the inverted conical casing corresponding to the classification rotor and shoulders a coarse powder outlet in a tangential direction opposite to the rotating direction of the rotor; A finely pulverized particle classification section comprising an upper lid casing provided with a fine powder discharge port in the center whose base end fits into the through hole of the classification rotor. Inlet 1 of the cooling jacket on the outer periphery of the stator is connected to the outlet of the cooling coil of the air cooler provided at the tip of the introduction pipe of the particle supply section for pulverized material through piping, and the outlet of the cooling jacket and The inlet of the refrigerator is connected via piping,
A pulverizer having a cooling device in which the outlet of a refrigerator and the inlet of a cooling coil of an air cooler are connected via piping. (2) (b) A stator is fitted with a gap of 1 cm or less between the rotor and the rotor, which is supported by a rotating shaft and has a large number of convex portions along the generatrix of the surface, and the stator is The inner surface of the child has a tooth shape with continuous approximately triangular concave portions and convex portions, one side of the concave portion of the tooth shape is directed toward the center of the rotor, and the other sides of the four portions are directed in the tangential direction of the rotor. The included angle between one side and the other side is 4
5 to 60 degrees, at least one stage of classification ring is provided on the inner peripheral surface of the stator to close part or all of the recess, and a cooling jacket is provided on the outer periphery of the stator; A stirring blade provided on the end plate of the rotating rotor, an inverted cone-shaped lower casing provided at the lower end of the stator to cover the stirring blade, and an air and crushing material provided on the lower surface of the lower casing. a supply part for particles to be crushed consisting of an introduction pipe for introducing particles; a centrifugal blade provided on the outer periphery of the upper end of the rotor; and an inverted conical casing provided at the upper end of the stator in correspondence with the centrifugal blade. a pulverized particle dispersion section comprising: a classification rotor provided at the upper end of the centrifugal blade and having a through hole in the center; A classification casing having an O'1 powder outlet in the tangential direction opposite to the direction, and a fine powder discharge port provided at the upper end of the classification casing and having its base end fitted into the through hole of the classification rotor in the center. A finely pulverized particle classification section comprising an upper lid casing having a cylindrical shape. A classifier is installed in the middle of a discharge pipe that connects the coarse powder discharge port of the classification casing and the bag filter in the finely pulverized product classification section, and the powder discharge port A11 of the classifier is connected to the pipe to collect the particles of the to-be-pulverized material. a coarse powder return circuit connected to the introduction pipe of the supply section; an inlet of a cooling jacket on the outer periphery of the stator and an outlet of a cooling coil of an air cooler provided at the tip of the introduction pipe of the particle supply section for pulverized particles; The outlet of the cooling jacket and the inlet of the cold Ha are connected through the piping, and the outlet of the refrigerator and the cooling coil of the air cooler are connected through the piping. A pulverizing device having a device.