JPS5980339A - Wet comminuting machine - 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 fist-type pulverizer.

There are many conventional types of wet pulverizers, and among these, the media agitation type pulverizer shown in FIGS. 1 and 2 is widely used because of its high pulverization efficiency.

The medium agitation type crusher 1 shown in FIG. 1 is constructed by inserting swirling blades 5 attached to a rotating inner wall 1lIllI4 with a certain gap 3 in a tank 2, and a hollow rotating shaft rotating at high speed. A slurry made by mixing water and particles of the material to be crushed at a constant ratio and balls as a crushing medium are continuously put into the tank 4, and the slurry is put into the tank 2 through the lower end opening 4a, and the slurry is mixed with the stirring blade 5 rotating at high speed. While stirring the balls to finely pulverize the platelets to be crushed, the slurry and balls are discharged through the gap 3 as shown by the arrow, and are discharged from the discharge port 6 on the outer periphery of the upper end to the outside of the waste tank 2, and passed through the discharge pipe 1 into the sieve 8. The slurry is sent to the slurry tank 9 through the discharge pipe 1, where it is stored.
The washed balls are sent to a sieve 13 through a transport pipe 12, where they are drained.
A ball-only feeder 10' was used to feed 15 media agitation type crushers shown in FIG. The agitator 20 is charged concentrically, and water and particles to be crushed are placed in a tank 17 at a constant ratio VC: 6t5 [Also, slurry and balls as a crushing medium are mixed]. Insert and agitator 20
is rotated for the required time to agitate the slurry and the balls to finely pulverize the particles of the material to be crushed, and at the same time, open the drain valve 21 installed in the tank [11], and drain the circulation pipe installed in the middle of the circulation pipe 22. The bong 23 is rotated, the slurry is circulated through the circulation pipe 22 and put into the tank 11, and the bowl pulverized particles in the slurry are turned into fine powder &?・Repeat what you do. In this wet pulverization of particles of the material to be pulverized, a ball Vi tank 17 is used as a pulverizing medium.
The ball B moves as shown by the arrow inside the slurry, but due to natural sedimentation, the ball B is at a much lower position than the slurry SX. The agitator 20 rotates for a required period of time to wet-pulverize the particles to be crushed, and the resulting product slurry is? l&J@
The valve 24 downstream of the circulation pump 23 in the piping 22 is opened to discharge the balls, and the balls in the tank 1γ pass through the tank 1T by 90 degrees and are discharged.

By the way, each of the above-mentioned media agitation type pulverization t? ! 1 and 15 are
In both cases, the slurry is stirred using balls as a grinding medium, so the inner surfaces of tanks 2 and 17 are significantly worn and damaged. The balls, which are the grinding media, are also damaged. As a result, impurities such as ball fragments and particles due to wear and tear of the tanks 2 and 17 are mixed into the product slurry, resulting in a decrease in the quality of the product slurry.

In addition, in the medium agitation type crusher 1 shown in Fig. 1, the balls as the grinding medium are circulated in 41 and 12 troughs, and in the medium agitation type pulverizer 15 shown in Fig. 2, the slurry is circulated in a tank t. This requires a circuit, which not only increases the cost of the incidental equipment and operating costs, but also requires a great deal of labor and time for maintenance, inspection, maintenance, etc.).

Furthermore, each medium agitation type crushing 4i% 1 in Figures 1 and 2
, 15, since a circulation path for the slurry and balls is not clearly secured in the tank 2.11, the progress of pulverization varies depending on the location within the tank. As a result, the particles in the product slurry are scattered, and the particle size range of the particles in the knife 1 is also widened. In addition, when the above-mentioned media agitation type crusher 1゜15 is operated for a long time, the temperature of the circulating slurry decreases to L.
1, and as the water evaporates, the slurry concentration gradually decreases to 11
The viscosity of the slurry increased, mechanical troubles hindered the circulation of the slurry, and the electric motor overflowed.
! i'f: It is impossible to generate powder of a mildly heat-sensitive substance.

The present invention was made in order to solve the problem of Jl+rn.
By circulating the slurry in a dry tank, it is possible to narrow the particle size range of the particles in the product slurry, and to obtain a product slurry of good quality with no contamination of impurities.Furthermore, even during long-term operation, the circulating slurry remains stable. It is an object of the present invention to provide a wet-type pulverizer that prevents temperature rise.

An embodiment of the wet-type pulverizer according to the present invention will be described below with reference to FIGS. A large number of convex portions 21 are provided to form an uneven surface, a discharge 128 is provided in the tangential direction of the lower end of the t11, and a valve 29 is provided at the tip.
There are 1t. A cooling jacket 30 is provided on the outer peripheral surface of the lower half of the fixed tank 25, and a cooling water outlet 31 is provided at the F end and a cooling water outlet 32 is provided at the upper end. 33 is a fixed gap 34 in the F flat part in the RiJ fixed tank 25.
The rotating tank 33 is equipped with a bearing 3.
5.36, the bottom plate of the fixed tank 25 is rotated by C on the frame 26. A large number of protrusions 38 are provided on the generatrix line to form an uneven surface, and the inner circumferential surface 39 is formed in the shape of a circle so that the circumferential wall is hollow. A plurality of openings 14 (l in this example) are provided at equal angular intervals on the outer periphery of the upper end, and an impeller 41 that performs a pumping action by high-speed rotation of the rotating tank 33 is provided inside the opening 40. A plurality of stirring blades 43, four in this example, are provided on the lower surface of the bottom plate 42 of the rotating tank 33. 44 is the fixed 4'l!t.
In the upper space 44 of the fixed tank 25, a plurality of guides, in this example two arc-shaped guides, are formed from the upper inner circumference of the fixed tank 25 toward the center of the rotating tank 33. 45 are provided point-symmetrically.1. ing. A water collection pipe 4 ti is supported at the tip of this double power point 45! IG jll is placed vertically at the center of the upper part of the rotating tank 33. 41
An upper lid casing is provided at the upper end of the fixed tank 25, and is provided with an inlet 48 facing the central water collection pipe 46. Reference numeral 49 denotes a cooling coil arranged in the rotating tank 33 and having an inner diameter larger than that of the water collecting pipe 46. The lower end of the coil is bent vertically, and the upper cover casing 47 is passed through the IPJ and further bent horizontally for cooling. The water volume is 50, and the upper end is similarly bent vertically to pass through the upper lid casing 47, and then bent horizontally to form a cooling water outlet 51. This cooling water inlet 50. A pipe (not shown) is connected to the cooling water outlet 51. 52 is a 2" pulley fixed to the lower end of the vertical rotating shaft 31; 53 is a drive belt; There is.

Next, the operation of the wet-type fine powder frame structure of the present invention constructed as described above will be explained. Close the valve 29 at the tip of the discharge port 28 provided at the lower end of the fixed tank 25, and open the water collection pipe 46 at the input port 48 to collect the slurry in which water and particles of the material to be crushed are mixed at a certain ratio. After supplying the slurry to a position slightly above the upper end of the rotating tank 33, an electric motor (not shown) is driven and the rotating tank 33 is rotated at high speed by the drive belt 53, and the slurry in the rotating tank 33 is processed by centrifugal action. The flow descends as a downward swirling flow along the conical inner peripheral surface 39, and is pumped into the annular gap 34 between the rotating tank 33 and the stationary tank 25 by the impeller 41 which pumps from the opening 40 at the lower end. The slurry that has entered this gap 34 becomes an upward swirling flow due to the rotational force of the rotating tank 33 that is rotating at high speed, and the particles of the material to be crushed in the slurry are given velocity energy and are thrown around the inner periphery of the fixed tank 25. It collides with the uneven surface of the surface and is crushed, and is subjected to a grinding action between the convex portion 38 on the outer peripheral surface of the rotating tank 33 and the convex portion 27 on the inner peripheral surface of the fixed tank 25, and is finely crushed fL. When the slurry leaves the annular gap 34 and reaches the upper space 44 of the fixed tank 25, the guide 45
Once assembled, they are guided to the center of the rotating tank 33, merge at the water collection pipe 46, and rotate upward for 1~! ! +33 inside) and enter intensively. Thereafter, the circulation of the rotating tank 33 is repeated for a certain period of time, and the particles of the material to be crushed in the slurry are transferred to the annular gap 34.
Each time it passes through a crushing zone, it is crushed to a predetermined particle size.

In the circulation of this slurry, since the rotary tank 33 has a cooling coil 49 at its center, the slurry that enters the rotary tank 33 from the water collection g4671) is transferred to the outside by centrifugal action.
During self-cutting and cutting, the cooling coil 49 comes into contact with the cooling coil 49, so efficient cooling is achieved rl. Also, since the lower half of the fixed tank 25 has the cooling jacket 30 on the outside Md surface, an upward swirling flow occurs inside the annular gap 34. The slurry passing through is sufficiently cooled. Therefore, even if the circulating slurry is operated for a long time, the temperature of the circulating slurry increases, but the water does not evaporate, so the slurry ρ degree remains constant.

As mentioned above, the slurry is repeatedly circulated for a certain period of time, and the product slurry, in which the particles in the slurry have a predetermined particle size, is stored in a slurry tank through a transport pipe (not shown) by opening the valve of the discharge port 28.

During the circulation of the slurry, the particles of the material to be crushed that settle to the bottom of the tank 25 are stirred by the stirring blades 43 that rotate at high speed and are integrated with the rotary tank 33, and are poured onto the bottom surface of the dish-shaped tank and released. It enters the annular gap 34 while rotating in the same direction, and is subjected to a crushing action.

Similarly, the cooling coil 49 in the rotating tank 33 is double or triple + l.
j may be set to further improve the cooling effect caused by the passing contact of the slurry.

As described above, the slurry of the wet-type pulverizer tJ1 of the present invention, in which particles of the material to be crushed are mixed with water in a proportion of -W, is mixed into a rotating tank with a conical inner circumferential surface - a lower end of the rotating tank is open 1'' - a lower half of the fixed tank. Inner circumference aI
The annular gap between the uneven surface of i and the uneven surface of the outer periphery ini of the rotating tank, the upper space of the fixed tank, and the rotating tank are repeatedly circulated for a certain period of time in the order of Since the powder can be ground to a predetermined particle size each time it passes through a grinding zone, there is no need for grinding media such as holes as in conventional wet pulverizers. In addition, since grinding media such as balls are not required, the inner surface of the fixed tank and the inner and outer surfaces of the rotating tank will not be damaged by wear and tear, and particles due to wear and tear of the fixed tank and the rotating tank can be contained in the product slurry. Since no impurities are mixed in, deterioration in the quality of the product slurry can be prevented. Furthermore, all particles of the material to be crushed in the slurry that is circulated and crushed pass through the crushing zone of the annular gap the same number of times, so there is no scattering of particles in the product slurry, and the particle size distribution is narrow and narrow. It is possible to obtain a product slurry containing particles of J9 [required degree]. In addition, the wet type pulverizer of the present invention can easily adjust the particle size of particles in the product slurry by adjusting the rotation speed of the 9-rotation tank.

Furthermore, the wet-type pulverizer of the present invention utilizes all the spaces inside the machine to form a self-circulating path for the slurry. There is no need to install a circuit, and the costs of associated equipment and operating costs are eliminated.

Maintenance, etc., is extremely simple as only this machine is required, and a lot of labor and time can be saved. In addition, the wet type pulverizer of the present invention has a cooling coil concentrically within the rotating tank and a cooling jacket on the outer peripheral surface of the fixed tank, which has a large ratio of 1:r.4, and is efficiently cooled. Therefore, even during long-term operation 17, the temperature of the circulating slurry does not rise for a moment, the water does not evaporate, and the concentration of the slurry remains constant. There is no risk of overloading the electric motor, and the crushing of mildly heat-sensitive materials is also possible.
It's a word of mouth. Shito) is also good at driving for long periods of time, so
Ultrafine pulverization of the particles in the slurry also has the excellent effect of nJ.

[Brief explanation of the drawing]

Fig. fA31 and Fig. 2 are schematic sectional views showing a conventional medium stirring type pulverizer, respectively, Fig. 3 is a longitudinal sectional view showing an embodiment of the wet pulverizer of the present invention, Fig. 4, Fig. 3 A-A1i of
! 5 is a sectional view taken along the line 13-B in FIG. 3. 25... Rotating tank 21... Convex part 28... Discharge LJ3Q... Cooling jacket 33... Rotating tank 34
... Gap 3γ ... Vertical rotation axis 38 ... Convex portion 39 ... Inner peripheral surface 40 ... Opening 41.
... Impeller 43...t? /, stirring blade 45
...Guide 46...Water collection pipe 47...1 lid cooling/ring 48...Inlet 49...Cooling coil applicant Kawa 111.7 Heavy Industries Co., Ltd. Agent
Patent attorney Yujibu Taka □, 1 Figure 1 i0' Figure 2 Figure 3 Figure 4 U Figure 5 11 2 1985 - Monthly note 11 Commissioner of the Patent Office Mr. Wakasugi Olio Toki 1, Ml display Showa 5741 special rr □r1 No. 190369
2' to 10' Wet-type pulverizer 3 Relationship with the case of the person making the amendment Patent applicant 4, agent Address 103
Contents of the amendment to 2-1 Nihonbashi-honmachi, Chuo-ku, Tokyo (1) Details: 11th row of 1-2-1 "Sen! 1 Feather" meeting "
1st 1 turn,” he corrected. (19 slurry and balls are fed into the gap 3 by the bong action of the blades 5a on the lower surface of the rotary cylinder 5, and the slurry and balls are fed into the gap 3 by the stirring blades 5 on the 15th and 16th rows of 21 direction 2. 0 13 + 1 + iJ 2 Correct ``to rise,'' in line 17 to ``by the rotating rotary cylinder 5.'' 0 151 FTil On page 3, line 7, ``Only the slurry, which is the raw material, continues to be replaced.'' 16+1 TiJ12 Negative 7th line "Required particle size" (7) Correct "Predetermined particle size" on page 12, line 12. (7) Adjust particle size Jt-r particle size to required particle size (8) Correct the drawing No. 1 as attached.0(9)
A leader line number 38 is added to FIG. 3 of the drawing, which is not yet drawn in the attached reference drawing. at) Code 4 as shown in the reference drawing attached to Figure 5 of the drawing.
Add leader line 1 of 2. Figure 3 Figure 5

Claims (1)

[Claims] A fixed tank having a large number of convex portions extending along the generatrix on the F half of the inner circumferential surface and discharging in the tangential direction of the upper end; and a cooling jaw foot provided in the lower half of the outer circumferential surface of the fixed tank. , vertical rotation i
It is supported by the upper ψHA of 11+ and fitted into the lower half of the fixed tank with a certain gap left! The outer peripheral surface of L has a large number of protrusions with a generatrix K iG, and the inner peripheral surface is formed in the shape of a circle (ζ), and at the F end thereof, 1 no. 110 is provided at angular intervals, and inside the opening. A rotating tank is provided with an impeller, and a stirring blade is provided on the lower surface of the bottom plate, and a plurality of r.
A circular arc-shaped guide with a cross section [-, and the tip of each guide 4iV
an upper lid casing having a water collection pipe arranged vertically at the center of the upper part of the rotating tank and an input port provided at the upper end of the fixed tank and facing the upper end of the water collection pipe at the center; and a cooling coil arranged centripetally within the rotating tank and having an inner diameter larger than that of the water collection pipe.