CN112387211B - Method and device for mixing and granulating thick slurry and dry powder - Google Patents
Method and device for mixing and granulating thick slurry and dry powder Download PDFInfo
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- CN112387211B CN112387211B CN202011178481.7A CN202011178481A CN112387211B CN 112387211 B CN112387211 B CN 112387211B CN 202011178481 A CN202011178481 A CN 202011178481A CN 112387211 B CN112387211 B CN 112387211B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
Abstract
The invention discloses a method and a device for premixing thick slurry and dry powder.A dry powder in a powder hopper is stirred by a forward-inclined pusher dog and falls to a plane orifice plate below the powder hopper through a plane screen; after the thick slurry with pressure enters the material cavity through the thick slurry feeding pipe, a thick slurry strip is formed by extending out of a slurry outlet of the plane orifice plate; the dry powder scattered and falling through the plane screen is coated on the surface of the thick slurry strip, the thick slurry strip is scraped by the rotary scraping claw wheel which is attached to the plane pore plate and is thrown out towards the periphery, and the thick slurry particles with the dry powder adhered to the surface finally fall into a collecting hopper to be collected and discharged, so that the premixing of the dry powder and the thick slurry is completed. The method utilizes the surface of thick slurry particles with larger specific surface area to coat the powder, not only realizes the uniform mixing of the powder and the thick slurry, and has short time consumption and high efficiency, but also does not destroy the original texture and physical properties of the thick slurry.
Description
Technical Field
The invention belongs to the technical field of producing granular substances, and particularly relates to a method and a device for mixing and granulating thick slurry and dry powder. The invention belongs to the technical field of mixing, and particularly relates to a method and a device for premixing dry powder of thick slurry by a dry method.
Background
The mixing is a universal operation form, and can realize the uniform distribution or dispersion of two or more different forms of materials in space according to different component proportions, thereby achieving the purposes of consistent structure of the mixed system space, improvement of reaction uniformity and the like.
In actual production, a certain amount of dry powder is required to be uniformly mixed into thick slurry.
Because the dry powder is a loose particle system and the thick slurry is a sol or a more complex solid-gel-liquid mixing system, the dispersibility and the flowability of the two materials are different greatly, when the two materials cannot be mixed by the measures of thick slurry dilution atomization, dry powder size mixing atomization or dry powder airflow atomization and the like, the mixing of the two materials is generally completed by the actions of repeated shearing dislocation, extension dispersion and the like during stirring or kneading operation, the mixing uniformity is not easy to ensure, the time-consuming long-acting rate is low, and the original texture and physical properties of the thick slurry are often damaged by long-time and repeated shearing and extension actions, so that the normal operation of the subsequent process is influenced. If proper premixing measures can be configured for stirring and kneading, preliminary and macroscopic uniformity in proportion and spatial distribution of components of dry powder and thick slurry can be ensured before shearing, dislocation and extension dispersion are carried out, so that the damage to material texture characteristics is reduced, and the microscopic uniformity and the production efficiency of mixed materials are improved.
Disclosure of Invention
In view of the problems and defects in the prior art, the present invention aims to provide a method for premixing thick slurry and dry powder, which uniformly spreads and adheres the dry powder on the surface of thick slurry soft particles, rapidly cuts the dry powder into particles, and throws out the particles to coat the thick slurry particles with the dry powder, and performs intermittent continuous (batch) premixing of two materials, namely the thick slurry and the dry powder. The method not only ensures that the dry powder and the thick slurry are uniformly mixed, has short time consumption and high efficiency, but also does not destroy the original texture and physical properties of the thick slurry.
The technical scheme adopted for realizing the aim is that the method for mixing and granulating the thick slurry and the dry powder comprises the following steps that the dry powder in a powder hopper is stirred by a forward-inclined pusher dog and falls to a plane pore plate below the powder hopper through a plane screen mesh; after the thick slurry with pressure enters the material cavity through the thick slurry feeding pipe, a thick slurry strip is formed by extending out of a slurry outlet of the planar pore plate; the dry powder scattered and falling through the plane screen is coated on the surface of the thick slurry strip, the thick slurry strip is scraped by the rotary scraping claw wheel which is attached to the plane pore plate and is thrown out towards the periphery, and the thick slurry particles with the dry powder adhered to the surface finally fall into a collecting hopper to be collected and discharged, so that the premixing of the dry powder and the thick slurry is completed.
Furthermore, the falling amount of the dry powder can be regulated and controlled by the aperture of the plane screen mesh, the density of the screen mesh, the number of the forward-inclined pusher dogs and the rotating speed.
Furthermore, the size of the thick slurry particles of the dry powder can be regulated and controlled by the aperture of a slurry outlet of the plane pore plate, the feeding pressure of the thick slurry, the number of claws of the backward tilting pusher dog and the rotating speed.
The invention also aims to provide a device for premixing thick slurry and dry powder, which comprises a powder hopper, a granulation spray nozzle and a collecting hopper, wherein the bottom edge of the powder hopper is connected with the upper end of a connecting disc of the granulation spray nozzle; the granulation spray head consists of a material cavity, a thick slurry feeding pipe, a circular plane orifice plate and a connecting disc, wherein the material cavity is connected with the connecting disc through a plurality of connecting rods, the center of the lower part of the material cavity is communicated with one end of the thick slurry feeding pipe, and the circular plane orifice plate is arranged at the upper part of the material cavity; the upper edge of the planar screen is provided with a material distribution claw wheel, and the upper edge of the planar pore plate is provided with a material scraping claw wheel; a rotating shaft is arranged in the center of the powder hopper, one end of the rotating shaft sequentially penetrates through a fixing frame at the upper end of the powder hopper, the distributing claw wheel and the plane screen to be connected with the scraping claw wheel, and the other end of the rotating shaft is connected with a motor; the other end of the thick slurry feeding pipe is connected with a high-pressure pump; a plurality of forward-inclined pusher dogs which are uniformly distributed in the circumferential direction are arranged on the material distribution claw wheel; a plurality of backward tilting pusher dogs which are uniformly distributed in the circumferential direction are arranged on the scraping claw wheel; and the plane pore plate is provided with a plurality of slurry outlets.
Furthermore, the forward-inclined pusher dogs and the backward-inclined pusher dogs are the same in number.
Furthermore, the bottom surface of the material distribution claw wheel is attached to the planar screen, and the bottom surface of the material scraping claw wheel is attached to the planar pore plate.
Furthermore, the lower part of the free end of the backward-inclined pusher dog is shaped like an axe.
The invention relates to a method for mixing and granulating thick slurry and dry powder and a device thereof, which has the working principle that: the motor provides power for the rotating shaft, the rotating shaft simultaneously drives the material distribution claw wheel and the material scraping claw wheel to rotate, the forward-inclined pusher dog stirs dry powder in the powder hopper, the dry powder falls to a plane pore plate below the powder hopper through a plane screen, the high-pressure pump provides pressure for thick slurry, and the thick slurry with pressure enters a material cavity through a thick slurry feeding pipe and then extends out of a slurry outlet of the plane pore plate to form a thick slurry strip; the dry powder falling through the plane screen is coated on the surface of the thick slurry strip; then, the rotary scraping claw wheel is stuck to a plane hole plate to scrape off the thick slurry strips and throw the thick slurry strips out to the periphery; and finally, collecting and discharging the thick slurry particles with the dry powder adhered to the surface from the collecting hopper to finish the premixing of the dry powder and the thick slurry.
Compared with the prior art, the method and the device for mixing and granulating the thick slurry and the dry powder have the beneficial effects that:
1) the powder is coated on the surface of the thick slurry particles with larger specific surface area, so that the uniform mixing of the powder and the thick slurry can be realized;
2) no dust is generated;
3) the mixing ratio of the powder and the thick slurry is adjustable;
4) when the requirement on the mixing uniformity is not high, the requirement on the mixing uniformity can be met; when the requirement on the mixing uniformity is higher, the pre-mixing can be used as the early-stage pre-mixing of kneading operation, so that the mixing uniformity and the mixing efficiency are improved.
Drawings
FIG. 1 is a schematic diagram of a pre-mixing apparatus for slurry and dry powder according to the present invention;
FIG. 2 is a schematic view of the powder hopper structure of the pre-mixing device for thick slurry and dry powder according to the present invention;
FIG. 3 is a schematic view of a distribution claw wheel of the premixing device for thick liquid and dry powder of the present invention;
FIG. 4 is a schematic diagram of a scraper wheel of the premixing device for dense slurry and dry powder according to the present invention;
FIG. 5 is a view showing the structure of the assembly of the granulating nozzle and the collecting hopper of the premixing device for dense slurry and dry powder according to the present invention.
Detailed Description
The method and the device for premixing the thick slurry and the dry powder are further described in detail by combining the attached drawings and the specific embodiment given by the inventor.
Example 1
A thick slurry and dry powder premixing method is characterized in that dry powder in a powder hopper 1 falls to a plane orifice plate 12 below the powder hopper through a plane screen 7 under the stirring of a forward-inclined pusher dog 8; after entering the material cavity 10 through the thick liquid feeding pipe 11, thick liquid with pressure extends out of the slurry outlet 13 of the plane orifice plate 12 to form thick liquid strips; the dry powder which falls through the plane screen 7 is coated on the surface of the thick slurry strip; then, the rotary scraping claw wheel 4 is attached to the plane hole plate 12 to scrape off the thick slurry strips and throw the thick slurry strips out to the periphery; and finally, the thick slurry particles with the dry powder adhered to the surface fall into a collecting hopper to be collected and discharged, so that the premixing of the dry powder and the thick slurry is completed.
The falling amount of the dry powder can be regulated and controlled by the aperture of the screen mesh of the plane screen 7, the density of the screen mesh, the number of the forward-inclined pusher dogs 8 and the rotating speed.
The size of the concentrated slurry particles can be regulated and controlled by the aperture of the slurry outlet 13 of the plane orifice plate 12, the feeding pressure of the concentrated slurry, the number of claws of the backward tilting pusher dog 9 and the rotating speed.
When the particle size of the dry powder is less than or equal to the aperture of the plane screen 7 and the slurry outlet 13 adopts small aperture, dense arrangement and short thick slurry particles, the premixing uniformity is favorably improved.
Example 2
Referring to fig. 1 to 5, a device for premixing thick slurry and dry powder comprises a powder hopper 1, a granulation nozzle 5 and a collection hopper 6, wherein the bottom edge of the powder hopper 1 is connected with the upper end of a connecting disc of the granulation nozzle 5, the lower end of the connecting disc of the granulation nozzle 5 is connected with the upper end of the collection hopper 6, the powder hopper 1 is in the shape of two bellmouthes, and a plane screen 7 with holes is arranged at the middle thin waist part; the granulation nozzle 5 consists of a material cavity 10, a thick slurry feeding pipe 11, a circular plane pore plate 12 and a connecting disc, wherein the material cavity 10 is connected with the connecting disc through a plurality of connecting rods, the center of the lower part of the material cavity is communicated with one end of the thick slurry feeding pipe 11, and the circular plane pore plate 12 is arranged at the upper part of the material cavity; the upper edge of the plane screen 7 is provided with a material distribution claw wheel 3, and the upper edge of the plane pore plate 12 is provided with a material scraping claw wheel 4; a rotating shaft 2 is arranged in the center of the powder hopper 1, one end of the rotating shaft 2 sequentially penetrates through a fixing frame at the upper end of the powder hopper 1, a cloth claw wheel 3 and a plane screen 7 to be connected with a scraping claw wheel 4, and the other end of the rotating shaft is connected with a motor; the other end of the thick slurry feeding pipe 11 is connected with a high-pressure pump; a plurality of forward-inclined pusher dogs 8 which are uniformly distributed in the circumferential direction are arranged on the distributing dog wheel 3, and the forward-inclined design of the pusher dogs is beneficial to preventing the powder from being thrown to the periphery to cause a hollow phenomenon; the scraper wheel 4 is provided with a plurality of backward tilting pusher dogs 9 which are uniformly distributed in the circumferential direction, the backward tilting design of the backward tilting pusher dogs 9 is beneficial to throwing the materials to the periphery to avoid the material congestion phenomenon, and the plane pore plate 12 is provided with a plurality of slurry outlets 13.
The forward-inclined pusher dogs 8 and the backward-inclined pusher dogs 9 are the same in number.
The bottom surface of the material distributing claw wheel 3 is attached to the plane screen 7, and the bottom surface of the material scraping claw wheel 4 is attached to the plane orifice plate 12.
The lower part of the free end of the backward tilting pusher dog 9 is shaped like an axe and is arranged in a concave channel formed by the mutual connection of the material cavity 10, the connecting rod and the connecting disc, which is beneficial to scraping off thick pulp strips on a plane orifice plate and throwing away the thick pulp strips at one time, and avoids the generation of the material congestion phenomenon. The concave canal is divided by tie rods into a number of equal discharge openings 14.
The attached drawings of the device for mixing and granulating the thick slurry and the dry powder do not show a motor connected with one end of a rotating shaft 2 and a high-pressure pump connected with the other end of a thick slurry feeding pipe 11, but the implementation of the technical scheme of the invention is not influenced, and the conventional installation and connection means adopted by the two devices are the prior art commonly used in the field.
Although the technical solutions in the embodiments of the present invention have been clearly and completely described in conjunction with the drawings in the embodiments of the present invention, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art based on the embodiments of the present invention without making any creative effort, and many changes, modifications, substitutions and variations to the embodiments are all within the scope of protection of the present invention.
Claims (4)
1. A device for mixing and granulating thick slurry and dry powder comprises a powder hopper (1), a granulating spray nozzle (5) and a collecting hopper (6), wherein the bottom edge of the powder hopper (1) is connected with the upper end of a connecting disc of the granulating spray nozzle (5), the lower end of the connecting disc of the granulating spray nozzle (5) is connected with the upper end of the collecting hopper (6), and the device is characterized in that the powder hopper (1) is in the shape of two horn mouths, and a plane screen (7) with holes is arranged at the middle thin waist part; the granulation nozzle (5) consists of a material cavity (10), a concentrated slurry feeding pipe (11), a circular plane pore plate (12) and a connecting disc, wherein the material cavity (10) is connected with the connecting disc through a plurality of connecting rods, the center of the lower part of the material cavity is communicated with one end of the concentrated slurry feeding pipe (11), and the circular plane pore plate (12) is arranged at the upper part of the material cavity; the upper side of the plane screen (7) is provided with a material distribution claw wheel (3), and the upper side of the plane pore plate (12) is provided with a material scraping claw wheel (4); a rotating shaft (2) is arranged in the center of the powder hopper (1), one end of the rotating shaft (2) sequentially penetrates through a fixing frame at the upper end of the powder hopper (1), the distributing claw wheel (3) and the plane screen (7) to be connected with the scraping claw wheel (4) and simultaneously drives the distributing claw wheel and the scraping claw wheel to rotate, and the other end of the rotating shaft is connected with a motor; the other end of the thick slurry feeding pipe (11) is connected with a high-pressure pump;
a plurality of forward-inclined pusher dogs (8) which are uniformly distributed in the circumferential direction are arranged on the material distribution claw wheel (3);
a plurality of backward tilting pusher dogs (9) which are uniformly distributed in the circumferential direction are arranged on the scraping claw wheel (4);
the plane pore plate (12) is provided with a plurality of slurry outlets (13).
2. Device according to claim 1, characterized in that the number of forward-tilting fingers (8) and backward-tilting fingers (9) is the same.
3. The device according to claim 1, characterized in that the bottom surface of the distribution claw wheel (3) is attached to the planar screen (7) and the bottom surface of the scraper claw wheel (4) is attached to the planar perforated plate (12).
4. A device according to claim 1, characterised in that the lower part of the free end of the rearwardly-inclined finger (9) is hatchet-like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178481.7A CN112387211B (en) | 2020-10-29 | 2020-10-29 | Method and device for mixing and granulating thick slurry and dry powder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011178481.7A CN112387211B (en) | 2020-10-29 | 2020-10-29 | Method and device for mixing and granulating thick slurry and dry powder |
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| Publication Number | Publication Date |
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| CN112387211A CN112387211A (en) | 2021-02-23 |
| CN112387211B true CN112387211B (en) | 2022-06-14 |
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| CN202011178481.7A Active CN112387211B (en) | 2020-10-29 | 2020-10-29 | Method and device for mixing and granulating thick slurry and dry powder |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2902285Y (en) * | 2006-04-21 | 2007-05-23 | 成都永泰制药化工机械厂 | Machine for medicine coating and granulating |
| CN101781072A (en) * | 2009-12-14 | 2010-07-21 | 天津泰达环保有限公司 | Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment |
| CN203899564U (en) * | 2014-06-27 | 2014-10-29 | 佛山市东鹏陶瓷有限公司 | Oil field fracturing propping agent granulating system |
| CN205432070U (en) * | 2015-12-20 | 2016-08-10 | 甘源食品股份有限公司 | Whitewashed all -in -one is wrapped up in in unloading |
| CN109821475A (en) * | 2019-04-04 | 2019-05-31 | 江苏瑞安特重型机械有限公司 | A kind of spray granulation drier |
| CN209254689U (en) * | 2018-12-25 | 2019-08-16 | 江西江磷肥业有限公司 | A kind of novel compound fertilizer centrifugal granulating device |
| WO2020144363A1 (en) * | 2019-01-11 | 2020-07-16 | Société des Produits Nestlé S.A. | Extrusion device with a granulating turbine and food-grade granulates |
-
2020
- 2020-10-29 CN CN202011178481.7A patent/CN112387211B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2902285Y (en) * | 2006-04-21 | 2007-05-23 | 成都永泰制药化工机械厂 | Machine for medicine coating and granulating |
| CN101781072A (en) * | 2009-12-14 | 2010-07-21 | 天津泰达环保有限公司 | Sludge granulating and drying treatment method and sludge granulating and drying treatment equipment |
| CN203899564U (en) * | 2014-06-27 | 2014-10-29 | 佛山市东鹏陶瓷有限公司 | Oil field fracturing propping agent granulating system |
| CN205432070U (en) * | 2015-12-20 | 2016-08-10 | 甘源食品股份有限公司 | Whitewashed all -in -one is wrapped up in in unloading |
| CN209254689U (en) * | 2018-12-25 | 2019-08-16 | 江西江磷肥业有限公司 | A kind of novel compound fertilizer centrifugal granulating device |
| WO2020144363A1 (en) * | 2019-01-11 | 2020-07-16 | Société des Produits Nestlé S.A. | Extrusion device with a granulating turbine and food-grade granulates |
| CN109821475A (en) * | 2019-04-04 | 2019-05-31 | 江苏瑞安特重型机械有限公司 | A kind of spray granulation drier |
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| CN112387211A (en) | 2021-02-23 |
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