JP6159587B2 - Powder liquid mixing equipment - Google Patents

Description

  The present invention relates to a powder / liquid mixing apparatus, and more particularly to a powder / liquid mixing apparatus that mixes introduced powder and liquid to generate a slurry.

  In order to produce a mixture by stirring and mixing the powder and the liquid, a vibration stirring device called “stirring and mixing device (vibro mixer)” is used. Patent Document 1 discloses a stirring and mixing device using vibration stirring. This powder and liquid stirring and mixing device is provided with a casing provided with a flow passage through which a fluid is circulated, a shaft portion disposed in the casing and connected to a motor, and attached around the shaft portion. The stirring blade is composed of a stirring blade and the stirring blade is vibrated in the axial direction so that stirring is promoted.

  In general, when a liquid is added to a powder and mixed, when a powder is added to a liquid and mixed, and when a powder and a liquid are simply added and mixed simultaneously, the powder is mixed in the liquid. It is known that the next agglomerated grains (so-called lumps) are generated. It is also known that it is extremely difficult to disperse secondary aggregation once generated in a liquid. In response to this phenomenon of secondary aggregation, the stirring and mixing device using vibration stirring can uniformly stir the powder and the liquid.

  However, in the vicinity of the powder inlet where the powder and the liquid are in contact with each other in the stirring and mixing apparatus, there is a problem that the powder absorbs moisture to cause secondary aggregation and close the powder inlet. Then, the stirring mixing apparatus which suppresses secondary aggregation as shown in patent document 2 was proposed. This stirring and mixing apparatus includes an introduction pipe provided with a powder introduction port and a liquid introduction port, and an extrusion unit that extrudes a mixture of powder and liquid that is connected to the introduction tube and introduced from the introduction tube to one end. A casing provided with a flow path through which a fluid composed of an extruded mixture connected to one end of the extruded tube is provided, and a shaft portion disposed in the casing and connected to a drive source, and the shaft And a stirring body including a stirring blade attached around the part. A funnel-type powder introduction device is attached to the powder introduction port, and the powder introduction device is provided with a feeder for conveying the powder. This feeder is connected to a vibration rotation drive source. As shown in this patent document 2, an introduction tube, an extrusion tube, a feeder and the like are incorporated in a stirring and mixing device (vibro mixer), and these are used for mixing and dispersing powder and liquid to suppress secondary aggregation. It has been disclosed that it is possible.

  However, when agitation and mixing is developed in various fields, the phenomenon that secondary agglomerates of powder are generated in this liquid occurs remarkably when the powder is mixed with a highly viscous liquid. It became clear. In that case, it was impossible to cope with the method in which the introduction tube, the extrusion tube, the feeder and the like were incorporated in the stirring and mixing device (vibro mixer), and a new measure was required. Therefore, a method of performing so-called “premixing”, which is a pretreatment for mixing powder and liquid, with an independent device was examined with respect to “vibromixing” by a stirring and mixing device (vibromixer). In other words, a powder / liquid mixing device has been proposed in which a powder or a mixture of powder and liquid supplied to a stirring and mixing device does not adhere to the device and supplies a high-quality slurry to the stirring and mixing device.

  For example, Patent Document 3 discloses a stirring and mixing apparatus and a raw material stirring and mixing system that can obtain a mixed stirred product that is uniformly dissolved or melted. Here, the raw material introduction device connected to the stirring and mixing device includes a raw material storage unit that stores the raw material therein, a raw material supply path that communicates from the raw material storage unit to the introduction port, and a raw material that is stored in the raw material storage unit. And a pump for pushing out to the raw material supply path. This raw material accommodating part has a raw material supply port, and a raw material is supplied through this raw material supply port. The pump has an impeller disposed inside the raw material container, and a rotary motor as a raw material rotation source is connected to the impeller. Specifically, the rotary motor is connected to the rotating shaft of the impeller, and a scraper is provided around the rotating shaft. Thus, it is described that the impeller rotates in the raw material container and pushes the raw material to the raw material supply path.

JP 2004-160445 A JP 2006-187756 A JP2011-189310A

  As described above, a method has been devised in which “premixing” is performed by a powder and liquid mixing device as a pretreatment for stirring and mixing by a stirring and mixing device (vibro mixer). However, when the powder is mixed with a liquid having a higher viscosity, there is a problem that adhesion to the apparatus remains and a uniform and homogeneous slurry cannot be supplied.

  There is a problem that the quality of the mixed liquid that is the final product in the stirring and mixing device cannot be ensured if adhesion to the device remains in the powder and liquid mixing device and uniform and homogeneous slurry cannot be supplied to the stirring and mixing device. There is a need for more effective powder-liquid mixing devices.

  An object of the present application is to solve such problems and provide an efficient powder-liquid mixing apparatus that generates high-quality slurry without adhering the introduced powder and a mixture of powder and liquid to the apparatus. It is.

In order to achieve the above object, a powder-liquid mixing apparatus according to the present invention is a powder-liquid mixing apparatus that generates a slurry by mixing introduced powder and liquid. A powder supply unit having a hopper to be conveyed to the powder liquid mixing unit, a powder mixed from the powder supplied from the powder supply unit and a liquid introduced from the liquid inlet, and adhered to the inner wall of the casing; A powder-liquid mixing unit having a movable scraper that scrapes the mixture with the liquid, and the hopper of the powder supply unit and the movable scraper of the powder-liquid mixing unit rotate together at a predetermined rotational speed. It is characterized by doing.

With the above-described configuration, the powder / liquid mixing apparatus according to the present invention includes two rooms having different functions of the powder / liquid mixing unit and the powder supply unit . That is, in the powder supply unit , the powder introduced into the powder supply unit is scraped off by a fixed scraper while adhering to the inner wall of the powder supply unit while absorbing the surrounding moisture. The function of distributing and supplying to the liquid mixing section is demonstrated. On the other hand, powder and liquid are mixed in the powder / liquid mixing part, but the mixture of powder and liquid generated during mixing adheres to the inner wall of the powder mixing part while scraping with a movable scraper. Demonstrate the function of That is, regarding the two types of states, ie, the powder before being mixed with the liquid and the mixture of the liquid and the powder after being mixed with the liquid, the degree of adhesion and the state of the adhered matter adhering to the inner wall of the apparatus are respectively determined. Can be efficiently prevented, and a high-quality slurry can be produced.

Moreover, powder-liquid mixing apparatus includes a hopper of the powder supply part, and a movable scraper powder-liquid mixing unit and mechanism to be integral, is rotated at the same rotational speed, the powder supply part and Konaeki mixing unit It is possible to drive a mechanism that does not allow deposits to adhere to each of the devices in order to efficiently produce a high-quality slurry.

The powder / liquid mixing apparatus includes a first shaft rod that rotates at a high speed inside the hopper, and the first shaft rod is connected to the powder outlet at the powder / liquid mixing portion side of the hopper. It is preferable that the powder is scattered around by centrifugal force generated by high-speed rotation. In this way, the powder introduced into the powder-liquid mixing unit is diffused by the centrifugal force by the first shaft rod that rotates at a higher speed to the hopper of the powder supply unit that rotates at a low speed to guide the powder. Mixing of powder and liquid in the liquid mixing section can be promoted.

  The powder / liquid mixing apparatus further includes a powder / liquid stirring unit having a second shaft bar provided with stirring blades, and the second shaft bar is connected to the first shaft bar and is slurried by high-speed rotation. Are preferably mixed with stirring. Thereby, the mixture of the powder and liquid mixed in the powder-liquid mixing part is further stirred and mixed by the stirring blade provided on the second shaft rod, and the function of the vibro mixer is added, so that the high-quality slurry or It can be used as a preparation liquid.

Further, the powder-liquid mixing device includes a powder supply unit including a fixed scraper, and the fixed scraper is fixed to the casing, and the powder adhered to the inner wall of the rotating hopper is cut along the longitudinal section of the hopper. It is preferable to scrape off. Thereby, it is possible to effectively scrape the powder in the powder supply portion having a lower viscosity by the blade portion along the longitudinal section of the hopper.

In the powder-liquid mixing device, the movable scraper has a linear or spiral blade portion, and scrapes while rotating so that the mixture of the powder and liquid adhering to the inner wall of the casing is twisted. preferable. Thereby, with respect to the adhesion of the powder-liquid mixing part having a higher viscosity, the helical blade part can be twisted and rotated to scrape the adhesive more effectively.

In this way, the fixed scraper scrapes off the less viscous deposit before being mixed with the liquid in the powder supply unit , and the movable scraper is the liquid and powder after being mixed with the liquid in the powder / liquid mixing unit. scrape high deposit viscous than a mixture of the body. In this way, scrapers with different mechanisms are utilized at appropriate positions, respectively, and the two types of state of the powder before being mixed with the liquid and the mixture of the liquid and the powder after being mixed with the liquid, respectively. Adhering matter adhering to the inner wall can be prevented according to the degree and state, and a high-quality slurry can be generated.

  As described above, according to the powder-liquid mixing apparatus according to the present invention, the introduced powder and the mixture of the powder and the liquid are not attached to the apparatus, and more efficient powder that generates a high-quality slurry. A liquid mixing apparatus can be provided.

It is sectional drawing seen from the side surface which shows schematic structure of one Embodiment of the powder-liquid mixing apparatus which concerns on this invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and showing a mechanism for scraping off powder adhered to the inner wall of the hopper by a fixed scraper. It is a BB cross section of Drawing 1, and is a sectional view showing a mechanism which scrapes off a mixture of powder and a liquid adhering to an inner wall of a casing by a liquid inlet and a movable scraper. It is CC sectional drawing of FIG. 1, and is sectional drawing which looked at one Example of the movable scraper of a powder-liquid mixing part from the side surface. It is sectional drawing seen from the side surface which shows schematic structure of other embodiment of the powder-liquid mixing apparatus which concerns on this invention. FIG. 6 is a cross-sectional view taken along the line DD of FIG. 5 and showing a stirring blade provided around the second shaft rod.

(First Embodiment of Powder-Liquid Mixing Device)
Below, it demonstrates in detail about 1st Embodiment of the powder-mixing apparatus 1 which concerns on this invention using drawing. FIG. 1 shows a schematic configuration of the first embodiment 1a in a sectional view as seen from the side. The powder liquid mixing apparatus 1 mixes the powder 11 introduced from the powder introduction port 7 and the liquid 12 introduced from the liquid introduction port 21 to form a mixture 14, generates a slurry 13, and generates a slurry outlet 18. Is a device derived from

(Powder-mixing and dispersing system)
This powder-liquid mixing apparatus 1 is an apparatus that constitutes a powder-liquid mixing and dispersing system. In the powder / liquid mixing / dispersing system, the introduced powder and liquid are mixed by a PQ mixer which is a powder / liquid mixing device to generate a slurry. The slurry is dispersed by a curl mixer and further stirred and mixed by a vibro mixer to produce a preparation liquid. And this powder-liquid mixing dispersion system processes these processes continuously with a pump. In addition, the powder / liquid mixing / dispersing system may be a system in which mixing by a PQ mixer and dispersion / stirring / mixing by a vibro mixer are continuously processed by a pump.

  By the powder / liquid mixing / dispersing system capable of continuous processing, secondary aggregation can be prevented without gelation. In addition, since automation can be easily performed regardless of the manual operation as in batch processing, the mixing ratio, dispersion force, mixing time, etc. are free from human error, and high quality control can be realized. Therefore, the powder / liquid mixing apparatus 1 which is a part of the powder / liquid mixing / dispersing system is required to produce a high-quality slurry without adhering the introduced powder and the mixture of the powder and the liquid to the apparatus. Is done.

(Configuration of powder supply unit )
As shown in FIG. 1, the powder / liquid mixing device 1 a includes a powder supply unit 2 and a powder / liquid mixing unit 3. The powder supply unit 2 includes a funnel-shaped hopper 6 and a fixed scraper 8 inside the upper casing 5a. The hopper 6 rotates at a low speed and conveys the powder 11 introduced from the powder introduction port 7 to the powder liquid mixing unit 3. Therefore, the hopper 6 is rotated by the low-speed transmission belt 19 that is linked to the low-speed rotation motor 16 provided on the side surface of the hopper 6. Thus, the hopper 6 rotates at a low speed, so that the powder 11 introduced from the powder introduction port 7 is naturally dropped to the lower powder supply unit 2, and the powder 11 adheres to the wall surface of the hopper 6. To some extent can be prevented.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. The powder 11 introduced from the powder inlet 7 may absorb the surrounding moisture and increase the adhesiveness, and it is difficult to completely drop the deposits only by the low speed rotation of the hopper 6. Therefore, a fixed scraper 8 that scrapes off the adhering powder 11 has been devised. The fixed scraper 8 is fixed to the upper casing 5 a and scrapes off the powder 11 adhering to the inner wall of the hopper 6 with a blade portion along the longitudinal section of the hopper 6. That is, the powder 11 adhering to the inner wall of the rotating hopper 6 is passively scraped off by the blade portion 23 along the longitudinal section of the hopper 6. In FIG. 2, three fixed scrapers 8a, 8b, and 8c are attached, but the number is not limited. Thus, the powder feeder 2, the hopper 6, and fixed scraper 8 rotates at a low speed, the powder 11 is a powder feeder 2 which has absorbed introduced powder 11, and the ambient moisture hopper 6 Can be prevented from adhering to the inner wall.

In addition, the powder supply unit 2 includes a first shaft rod 10 a that rotates at a high speed at the center of the hopper 6. Therefore, the first shaft rod 10a is rotated by the high-speed transmission belt 20 interlocked with the high-speed rotation motor 17 provided on the upper portion of the first shaft rod 10a.

(Configuration of the powder / liquid mixing part)
The powder / liquid mixing unit 3 includes a liquid inlet 21, a movable scraper 9, and a slurry outlet 18 inside the lower casing 5 b. Then, the powder 11 supplied from the powder supply unit 2 by the movable scraper 9 and the liquid 12 introduced from the liquid inlet 21 are mixed, and the powder 11 and the liquid 12 adhered to the inner wall of the lower casing 5b. The mixture 14 is scraped off and dropped further down. And the powder-liquid mixing part 3 guide | induces the mixture 14 of the powder 11 and the liquid 12 as the slurry 13 outside.

As shown in FIG. 1, the first shaft rod 10 a is connected to the powder scattering unit 32 in the powder / liquid mixing unit 3. The powder scattering portion 32 is shaped to diffuse the powder 11 guided in the vertical direction by the first shaft 10a in the horizontal direction. Accordingly, the powder 11 conveyed by the hopper 6 rotating at a low speed in the powder supply unit 2 is directed in the lateral direction by the powder scattering unit 32 and is centrifugally applied from the powder outlet port 15 of the powder / liquid mixing unit 3. It is dispersed and supplied to the powder / liquid mixing unit 3. Then, it is mixed with the liquid introduced from the liquid inlet 21. However, the shape of the powder outlet 15 shown in FIG. 1 is one embodiment, and is not limited to this as long as the powder 11 is scattered.

  FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 1 and shows a mechanism for scraping the mixture 14 of the powder 11 and the liquid 12 adhered to the inner wall of the lower casing 5b by the liquid inlet 21 and the movable scraper 9. . The liquid inlets 21 are shown in two places in FIG. 1, but are not limited thereto and may be provided in arbitrary places. As the number of the liquid inlets 21 increases, the liquid 12 is dispersed and discharged into the lower casing 5b. Then, the powder 11 discharged from the powder outlet 15 is efficiently mixed with the liquid 12 discharged inside the lower casing 5b.

As shown in FIGS. 1 and 3, the hopper 6 of the powder supply unit 2 is connected to the ring beam 27 and the radiation beam 28 of the powder liquid mixing unit 3. The ring beam 27 is a circular beam, and the radiation beam 28 is connected to four locations of the ring beam 27, and the movable scraper 9 is connected to each radiation beam 28. The ring beam 27 and the radiation beam 28 are accommodated inside the ring beam 27 without the first shaft 10a being in contact therewith. For this reason, the hopper 6 and the movable scraper 9 can be rotated at a low speed in synchronization with each other because the edges of the hopper 6 and the movable scraper 9 are cut off from the first shaft rod 10a that rotates at a high speed.

  As shown in FIG. 3, the movable scraper 9 of the powder-liquid mixing unit 3 has a blade portion 24 in the lower casing 5b and twists the mixture 14 of the powder 11 and the liquid 12 attached to the inner wall of the lower casing 5b. Scrape while rotating. That is, the movable scraper 9 includes an upper scraper 29 and a lower scraper 30 in accordance with the upper cylindrical portion 25 and the lower funnel portion 26 of the lower casing 5b.

  The upper scraper 29 is attached so that the blade portion 24 is inclined at an angle (α) with respect to the inner wall of the lower casing 5b. The upper scraper 29 may be linear as shown in FIG. 1 or may be spiral. Thus, the upper scraper 29 scrapes off the mixture 14 while rotating to twist. Thereby, the mixture 14 of the powder 11 and the liquid 12 adhering to the inner wall of the lower casing 5b can be effectively scraped so as to drop downward.

  On the other hand, the lower scraper 30 is attached so that the blade portion 24 is inclined at an angle (β) with respect to the inner wall of the lower casing 5b. The lower scraper 30 may be linear as shown in FIG. 4 or may be spiral. Thus, the lower scraper 30 scrapes off the mixture 14 while rotating so as to be twisted. Thereby, the mixture 14 of the powder 11 and the liquid 12 adhering to the inner wall of the lower casing 5b can be effectively scraped so as to drop downward. In the present embodiment, the angle (β) is a value closer to a right angle than the angle (α). The shape of the movable scraper 9 is not limited to the present embodiment, and any shape may be used as long as the mixture 14 of the powder 11 and the liquid 12 attached to the inner wall of the lower casing 5b is scraped and rotated.

The hopper 6 of the powder supply unit 2 and the movable scraper 9 of the powder liquid mixing unit 3 are integrally rotated at a low speed. Here, the low-speed rotation refers to a rotation that is low speed as compared with the high-speed rotation of the first shaft rod 10a. A mechanism that does not attach deposits to the respective devices in the powder supply unit 2 and the powder liquid mixing unit 3 is uniformly driven using a common low-speed rotation motor 16. Thereby, a high quality slurry can be generated by a simple mechanism. Further, the hopper 6 and the fixed scraper 8 are rotated at a low speed with respect to the first shaft rod 10a rotated at a high speed, and the powder 11 introduced more effectively, and the mixture 14 of the powder 11 and the liquid 12 are introduced. High quality slurry can be produced without adhering to the apparatus.

( Second Embodiment of Powder-Liquid Mixing Device)
In FIG. 5, schematic structure of 2nd Embodiment of the powder-mixing apparatus 1 which concerns on this invention is shown. Further, FIG. 6 shows a stirring blade 31 provided around the second shaft rod 10b, which is a DD cross section of FIG. The second embodiment 1 b includes a powder liquid agitating unit 4 disposed downstream of the powder liquid mixing unit 3 in addition to the powder supply unit 2 and the powder liquid mixing unit 3. Since this powder liquid stirring part 4 is the straight pipe part 22 connected to the funnel part 26 in the lower part of the powder liquid mixing part 3, it is a small diameter flow passage. And the powder-liquid stirring part 4 is equipped with the 2nd shaft bar 10b by which the stirring blade 31 was provided in the circumference | surroundings. Further, since the second shaft rod 10b is connected to the first shaft rod 10a, the slurry 13 is stirred and mixed by high speed rotation. In the present embodiment, the stirring blade 31 is a columnar protrusion extending radially from the second shaft rod 10b, but is not limited to this shape. Moreover, in this embodiment, although the stirring blade 31 is eight cylindrical protrusions, it is not restricted to this number.

Accordingly, the powder / liquid mixing device 1b further stirs and mixes the mixture 14 of the powder 11 and the liquid 12 mixed in the powder / liquid mixing unit 3 with the stirring blade 31 provided on the second shaft rod 10b. By adding the function of a mixer, a high-quality slurry 13 or preparation liquid can be obtained.

DESCRIPTION OF SYMBOLS 1 Powder liquid mixing apparatus, 1a 1st Embodiment of powder liquid mixing apparatus, 1b 2nd Embodiment of powder liquid mixing apparatus, 2 powder supply part , 3 powder liquid mixing part, 4 powder liquid stirring part, 5 casing, 5a Upper casing, 5b Lower casing, 6 hopper, 7 Powder inlet, 8 Fixed scraper, 8a 1st position, 8b 2nd position, 8c 3rd position, 9 Movable scraper, 9a 1st position, 9b 2nd position , 9c 3rd position, 9d 4th position, 10 shaft rod, 10a first shaft rod , 10b second shaft rod , 11 powder, 12 liquid, 13 slurry, 14 (powder and liquid) mixture, 15 Powder outlet, 16 Low speed motor, 17 High speed motor, 18 Slurry outlet, 19 Low speed belt, 20 High speed belt, 21 Liquid inlet, 22 Straight pipe section, 23 Blade section of fixed scraper, 24 Blade section of movable scraper, 25 Cylindrical section, 26 Funnel section, 27 Ring beam, 28 Radiation beam, 29 Upper scraper, 30 Lower scraper, 31 Stirring blade, 32 Powder scattering Part, α Upper scraper angle, β Lower scraper angle.

Claims (5)

In the powder-liquid mixing apparatus that mixes the introduced powder and liquid to produce a slurry,
A powder supply unit having a hopper for conveying the powder introduced from the powder introduction port to the powder liquid mixing unit;
A powder-liquid mixing unit having a movable scraper that mixes the powder supplied from the powder supply unit and the liquid introduced from the liquid inlet, and scrapes off the mixture of the powder and liquid adhering to the inner wall of the casing; , And the hopper of the powder supply unit and the movable scraper of the powder liquid mixing unit are integrally rotated at a predetermined rotation speed.   The powder / liquid mixing apparatus according to claim 1, wherein a first shaft rod that rotates at high speed is provided inside the hopper, and the first shaft rod is a powder provided on the powder / liquid mixing portion side of the hopper. A powder-liquid mixing device, wherein powder is scattered around by a centrifugal force generated by the high-speed rotation at a body outlet. 3. The powder / liquid mixing apparatus according to claim 2 , further comprising a powder / liquid stirring unit having a second shaft bar provided with a stirring blade, wherein the second shaft bar is connected to the first shaft bar. A powder-liquid mixing apparatus characterized in that the slurry is stirred and mixed by high-speed rotation. 4. The powder / liquid mixing device according to claim 1, wherein the powder supply unit includes a fixed scraper, and the fixed scraper is fixed to the casing and adheres to the inner wall of the rotating hopper. A powder / liquid mixing apparatus, wherein the powder is scraped off by a blade portion along the longitudinal section of the hopper. The powder-liquid mixing device according to any one of claims 1 to 4, wherein the movable scraper has a linear or spiral blade portion, and the powder and liquid adhered to the inner wall of the casing. A powder-liquid mixing apparatus, wherein the mixture is scraped off while rotating so as to be twisted.

that's all

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