JP2001179073A - Kneading and granulating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To granulate agglomerates with uniform quality and a uniform particle size. SOLUTION: An impeller 22 equipped with vanes 21 having blades 21a and an impeller 24 equipped with curved vanes 23 having arc-like curved faces 23a are installed in a kneading tank 4 in a freely rotatable manner, the gap S between the inner circumferential face 5, 5a..., 6 of the kneading tank 4 and the impellers 22, 24 is made narrow, and an object to be kneaded WC is extremely evenly mixed to be gradually agglomerated while being rolled, folded, and compacted among the vanes 21, 23 and between the inner circumferential face 5, 5a..., 6 of the kneading tank 4 and the vanes 21, 23 by turning the vanes 21, 23. The agglomerates W1 obtained have uniform quality and uniform diameter as same as the gap S between the vanes 21, 23 and the inner circumferential face 5, 5a..., 6 of the kneading tank 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of granulating a raw material such as a clay lump into small agglomerates, or a method of mixing a raw material with a coagulant such as cement to form a granule. The present invention relates to a kneading and granulating apparatus, and when cement is mixed into a clay ingot to form a small agglomerate, it is used for embedding in the sea, for increasing the volume of various kinds, or for concrete aggregate.

[0002]

2. Description of the Related Art Raw materials such as clay waste and construction waste from the ceramic industry cannot be used as such as landfills along the coast or concrete aggregate, so it is necessary to solidify the raw materials with cement or a coagulant. Conventionally, a twin-screw kneading machine is used in which a pair of rotating shafts are opposed to each other, and a number of blades attached to the rotating shafts are rotated to knead the raw material and the coagulant and granulate and form small agglomerates. It was being done. Also, when a clay plate formed by a filter press is granulated into small granules, a biaxial kneader has been used.

[0003] According to this method, small agglomerates are rapidly granulated and formed. However, the material to be kneaded in a soft state often adheres to the wall surface and solidifies. Collision causes wear and damage, impeding the kneading of the coagulant and raw material by the blades and the cutting function of the mixture. As a result, the formed granules are uneven in size, and the coagulant and raw material Is also inhomogeneous and has the problem that good quality agglomerates cannot be obtained. In addition, the work of replacing the blades due to the above-mentioned damage and the like and the work of removing solids adhered and solidified on the wall surface must be performed frequently, and this work is troublesome, takes time, is extremely troublesome, and requires a lot of work. In addition, the operation of the kneading machine must be stopped, which causes a problem that the production efficiency of agglomerates is poor.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention prevents the material to be kneaded from adhering to the wall surface and solidifying and growing, thereby preventing the blade from being damaged, and obtaining a uniform mass having a uniform particle size. The purpose is to do so.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a kneading tank in which an impeller provided with a blade having a cutting blade and an impeller provided with a curved blade having an arcuate curved surface are provided. Rotatably provided, the gap between the inner peripheral surface of the kneading tank and the impeller is made small, and shearing by the impeller having the two types of blades,
By rolling, folding, compressing and the like, the material to be kneaded is obtained with uniform particle size and uniform mass. Also, by providing the kneading tank relative to the rotating shaft on which the impeller is mounted so as to be able to reciprocate relatively in the axial direction, the blades scrape off the material to be kneaded attached to the inner peripheral surface of the kneading tank, Solution to the Problems

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In the embodiment shown in FIGS.
Is a stationary body of the kneading and granulating machine according to the present invention, which is provided with a kneading tank accommodating section 2 having a concave cross section having a predetermined volume at a front portion of the stationary machine body 1 and a driving section at a rear portion of the kneading tank accommodating section 2. A base 3 is provided. In the present embodiment, the kneading tank housing 2 is shown as having an opening at the top, but the opening is actually covered with a canopy (not shown).

A kneading tank 4 made of plastic rubber having flexibility and elasticity is housed and arranged on the inner periphery of the kneading tank housing section 2. The kneading tank 4 has peripheral walls (front and rear left and right side walls) 5, 5a,.
2, and is fixed to a metal mounting band 8 having an outward flange 7 protruding from upper ends of left and right side walls 5, 5a as shown in FIG. The flange 7 is vertically opposed to a flange 9 projecting outward from upper ends of the left and right side walls 2a and 2b of the kneading tank housing 2.

A plurality of bearing brackets 10 are fixed to the lower portion of the flange 7 of the kneading tank 4 along the length direction thereof,
Is rotatably supported, and the upper end flange 9 of the kneading tank housing portion 2 is supported.
Rolling arrangement above. Thereby, the kneading tank 4 is supported movably in the front-rear direction along the upper end flange 9 of the kneading tank housing 2. Further, as shown in FIG. 2, the center of the bottom 6 in the lateral direction becomes a slightly higher middle portion 12, and the left and right of the bottom 6 are curved in an arc shape. Then, a plurality of rollers are provided on the back surface of the middle / high section 12 in the longitudinal direction (depth in FIG. 2).
In order to correspond to the rollers 13, a projecting rail 14 having a substantially triangular mountain cross section is protruded at the center of the kneading tank housing 2, and the rollers 13 are rolled and arranged at the top of the projecting rail 14. ing. A hydraulic cylinder 15 for moving the kneading tank 4 back and forth is installed on the base 3, and the tip of the cylinder rod 15 a is fixed to a base 16 erected on the upper end of the rear wall 5 d of the kneading tank 4. The kneading tank 4 is moved forward and backward by driving the hydraulic cylinder 15.

A discharge hole 17 is provided in front of the bottom 6 of the kneading tank 4.
And a discharge chute 18 communicating with the discharge hole 17 is provided below the front wall 2c of the kneading tank housing 2. Further, a supply chute 19 is provided at an upper rear portion of the kneading tank 4, and a conveyer 20 for the clay cake W and a supply hopper 20 a for the cement C are provided above the supply chute 19.

In the kneading tank 4, an impeller 22 provided with a plurality of blades 21 having cutting blades 21a and an impeller 24 provided with a plurality of curved blades 23 having an arcuate curved surface 23a are rotatable. Is provided. The impellers 22 and 24 are alternately mounted on a pair of rotating shafts 25 and 26 arranged in parallel on the left and right in the kneading tank 4. The rotating shafts 25 and 26 are connected to the front and rear walls 5 of the kneading tank 4.
c and 5d are inserted into the kneading tank housing part 2 so as to extend over the front and rear of the kneading tank housing part 2.
2d is projected on the base 3 through the
Gears 27 and 28 are mounted on shafts 25 and 26, respectively, and one of the rotating shafts 25 is connected to a geared motor 29 installed on the base 3 to form a drive shaft. And the gear of one rotating shaft 25
27 is larger in diameter than the gear 28 of the other rotating shaft 26 to make the rotation ratio different, thereby increasing the rotation of the other rotating shaft 26. The rotating shafts 25 and 26 are rotatably supported by bearings 30 and 30a provided on the front end of the kneading tank housing 2 and the base 3, and the rotation ratio of the rotating shafts 25 and 26 is appropriately adjusted. Is set to Also, rotating shaft
In the case of 25 and 26, the front part is slightly inclined downward, and the bottom part 6 of the kneading tank 4 is also formed so that the front part is slightly inclined downward (see FIG. 3). In the present embodiment, the rotating shaft
Although 25 and 26 show two axes, it may be a single axis or a multi-axis in which three or more rotation axes are arranged in the left-right direction.

The impellers 22 and 24 have a boss 31 provided at the center thereof.
The blades 21 and 23 are radially protruded, and the boss 31 is fitted and fixed to the rotating shafts 25 and 26. Impeller 21 provided on impeller 22
As shown in FIG. 5, the tip is curved in a bow shape toward the distal end, and a cutting blade 21a is provided on the side of the bow, and the distal end 21b
Is bent. Further, the blades 23 provided on the impeller 24 are shown in FIG.
As shown in FIG. 7, a rectangular plate is formed into a curved shape in an arc shape, and a curved surface 23a is formed.
Is directed outward. The gap S between the inner peripheral surfaces 5, 5a,..., 6 of the kneading tank 4 and the impellers 22, 24, ie, the impeller
The tip portion 21b of the blade 21 and the inner peripheral surfaces 5, 5a.
The curved surface 23a and the inner peripheral surface 5, 5a of the blade 23 in the impeller 24
The gap S of 6 is narrow.

The blade 21 of the impeller 22 has its cutting edge
The material to be kneaded (filter cake W and cement C) WC is mainly sheared at 21a, and compressed between the tip 21b and the inner peripheral surfaces 5, 5a... With impeller 23 of impeller 24,
Mainly, the curved surface 23a and the inner peripheral surfaces 5, 5a,.
The WC to be kneaded is compressed, rolled and folded. Also, as shown in FIGS.
The impellers 22 and 24 respectively fixed to 25 and 26 are disposed so as to bite between the left and right sides of the impellers 22 and 24, and as shown in FIG. To the other rotation axis
Close to the 25 and 26 sides. According to experiments, feathers 21, 23
The optimum gap between the tip of the shaft and the other rotating shafts 25 and 26 was 1-2 cm.

According to this embodiment, the clay filter cake W which has been dewatered and filtered by the filter press is conveyed by the conveyor 20 and dropped from the supply chute 19 to the rear end of the kneading tank 4. The blades 21, 23 of the impellers 22, 24 are supplied from the supply hopper 20a and driven by the motor 29.
Are kneaded while being sheared, rolled, folded, and compressed between the blades 21 and 23 and between the inner peripheral surfaces 5, 5a... Furthermore, impeller 2
By rotating the blades 2 and 24, they are rolled between the blades 21 and 23 and the inner peripheral surfaces 5, 5a,..., 6 of the kneading tank 4 and solidified to form the agglomerates W1. From the discharge chute 18. The resulting agglomerates
W1 is a size whose diameter is a gap between the blades 21, 23 and the inner peripheral surfaces 5, 5a,.

At this time, on the inner peripheral surfaces 5, 5a,..., 6 of the kneading tank 4, portions corresponding to the intervals before and after the impellers 22, 24 are provided.
The material to be kneaded WC adheres and tries to solidify.
Always reciprocates back and forth to move the kneading tank 4 supported in the kneading tank housing 2 relative to the rotating shafts 25 and 26 in the axial front and rear directions. , 5a…, 6
Before the material to be kneaded WC attached to the container grows largely, the material to be kneaded WC is scraped off by the blades 21 and 23 which are relatively back and forth with respect to the kneading tank 4, or slides down due to the vibration of the kneading tank 4. In addition, kneading tank 4
Is a material having flexibility and elasticity, the blades 21,
Even if the material to be kneaded WC is pressed against the inner peripheral surfaces 5, 5a...
Are separated from the kneaded material WC and then scattered and fly away from the inner peripheral surfaces 5, 5a,..., 6 due to elasticity when the inner peripheral surfaces 5, 5a,. The moving distance of the kneading tank 4 may be at least half of the distance between the front and rear impellers 22 and 24, and usually 10 to 15
Just move cm. It is desirable that the kneading tank 4 is always moved forward and backward. However, the kneading tank 4 may be moved intermittently and may be selected according to the raw material.

In some cases, the material to be kneaded WC scatters on the side of the rotating shafts 25 and 26 and adheres to the boss 31, but the blades 21 and 23 of the rotating shafts 25 and 26 bite between each other before and after. , Feather 21,
The end of 23 is close to the rotating shafts 25 and 26, and each rotating shaft
Since the blades 21 and 23 of 25 and 26 rotate at different speeds, the blades 21 and 23 are rotated so as to approach the entire outer peripheral portion of the other rotation shafts 25 and 26 in a wide range, and the rotation shafts 25 and 26 are rotated. The mutual blades 21, 23 of the 26 quickly scrape and drop the kneaded material WC attached to the rotating shafts 25, 26 (the surface of the boss 31) before hardening.

[0016]

In summary, according to the present invention, two kinds of impellers 22, 24 are rotatably provided in the kneading tank 4, and the impellers 22, 24 and the inner peripheral surfaces 5, 5a. Is formed to be narrow, and the blade 21 of the impeller 22 is provided with a cutting blade 21a, so that the kneaded material WC is sheared and mixed, and the impeller 24 has an arc-shaped curved surface 23a. The kneaded material WC is mainly kneaded so as to compress, roll, and fold the kneaded material WC between the curved surface 23a and the inner peripheral surfaces 5, 5a,. In addition to uniformly dispersing the water therein, uniform mixing in which bubbles are excluded to the outside as much as possible can be achieved. Like this, the impeller
Due to the rotation of the blades 21 and 23 of 22 and 24, the material to be kneaded WC is formed between the blades 21 and 23 and between the inner peripheral surfaces 5, 5a,.
Is sheared, rolled, folded, compressed, and can be formed into a very uniform mixture while being compressed.
It is possible to obtain a uniform granular material W1 with a uniform particle size having a diameter of the gap S between the 23 and the inner peripheral surfaces 5, 5a,.

Further, since the kneading tank 4 is provided so as to be reciprocally movable in the axial direction relative to the rotating shafts 25 and 26 on which the impellers 22 and 24 are mounted, the inner peripheral surfaces 5 and 5a of the kneading tank 4 are provided. .., The kneaded material WC adhered to 6 is scraped off by the blades 21 and 23 which are relatively back and forth with respect to the kneading tank 4 without being grown, or is slid down by the vibration of the kneading tank 4.
Loss and breakage of the blades 21 and 23 can be prevented.

The kneading tank 4 is made of an elastic material such as rubber and has inner peripheral surfaces 5, 5a,..., 6 on which the material to be kneaded slidably contacts at the outer peripheral positions of the impellers 22, 24. , 6 are supported so that they can be flexibly displaced. Therefore, even if the material to be kneaded WC is pressed against the inner peripheral surfaces 5, 5a. The kneaded material WC scatters and flies off due to the elasticity of the elastic return of 5, 5a.
Since there is no sticking to 5a... 6 or accumulation and solidification, damage to the impellers 22 and 24 can be prevented.

The impellers 22, 24 are rotatably supported on multiple axes, and between the rotating shafts 25, 26, the respective impellers 21, 23 are provided.
Are disposed between the front and rear of the blades 21 and 23 of the other rotation shafts 25 and 26, and each of the rotation shafts is positioned so that the tips of the blades 21 and 23 are close to the other rotation shafts 25 and 26. 25, 26, the rotating shafts 25, 26
The kneaded material WC attached to the 25 and 26 sides can be scraped off, and the rotation ratios of the rotating shafts 25 and 26 are different.
The blades 21 and 23 can scrape off the kneaded material WC adhered over a wide range in the vicinity of the entire outer peripheral portion of the other rotating shafts 25 and 26, respectively. The practical effect is extremely large, such that the solidification of the kneaded material WC can be prevented and the blades 21 and 23 can be prevented from being damaged.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an enlarged sectional view taken along the line CC of FIG. 3;

FIG. 5 is an enlarged perspective view of a blade.

FIG. 6 is an enlarged perspective view of a blade.

[Explanation of symbols]

 4 Kneading tank 5, 5a ... Inner peripheral surface 6 Inner peripheral surface 21 Blade 21a Cutting blade 22 Impeller 23 Blade 23a Curved surface 24 Impeller 25 Rotation axis 26 Rotation axis S Gap WC

Claims (4)

[Claims] An impeller provided with a blade having a cutting blade and an impeller provided with a curved blade having an arcuate curved surface are rotatably provided in a kneading tank, and an inner peripheral surface of the kneading tank is provided. A kneading brewing apparatus characterized in that a gap with an impeller is narrowed. 2. The kneading and granulating apparatus according to claim 1, wherein the kneading tank is provided so as to be able to reciprocate relatively in the axial direction with respect to a rotating shaft on which the impeller is mounted. 3. The kneading tank has an inner peripheral surface where an object to be kneaded slides in contact with an outer peripheral position of the impeller, formed of an elastic material such as rubber.
3. The kneading and granulating apparatus according to claim 1, wherein the inner peripheral surface is supported so as to be able to be flexibly displaced. 4. An impeller is rotatably supported by a plurality of shafts, and between these rotation shafts, the respective blades are arranged between the front and rear of the other rotation shaft, and the tip of each blade is positioned between the rotation shafts. 4. The kneading and granulating apparatus according to claim 1, wherein each of the rotating shafts is attached to each rotating shaft so as to be close to the other rotating shaft side, and the rotation ratio of each rotating shaft is different.