CN108057384B - Method and equipment for continuously feeding and stirring dry powder - Google Patents

Method and equipment for continuously feeding and stirring dry powder Download PDF

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Publication number
CN108057384B
CN108057384B CN201810016943.1A CN201810016943A CN108057384B CN 108057384 B CN108057384 B CN 108057384B CN 201810016943 A CN201810016943 A CN 201810016943A CN 108057384 B CN108057384 B CN 108057384B
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Prior art keywords
stirring
stirrer
horizontal
dry powder
feeding
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CN108057384A (en
Inventor
杨志明
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Shenzhen Xinyuren Technology Co Ltd
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Shenzhen Xinyuren Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/82—Combinations of dissimilar mixers
    • B01F33/824—Combinations of dissimilar mixers mixing simultaneously in two or more mixing receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/834—Mixing in several steps, e.g. successive steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/80—Mixing plants; Combinations of mixers
    • B01F33/85—Mixing plants with mixing receptacles or mixing tools that can be indexed into different working positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2216—Time, i.e. duration, of at least one parameter during the operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
    • B01F35/2216—Time, i.e. duration, of at least one parameter during the operation
    • B01F35/22161—Time, i.e. duration, of at least one parameter during the operation duration of the mixing process or parts of it
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
    • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)

Abstract

The dry powder continuous feeding and stirring method and equipment, wherein the equipment comprises a plurality of feeding devices, a vertical stirrer and a horizontal stirrer, the plurality of feeding devices are communicated with a plurality of first feeding holes on the side wall of the vertical stirrer, a first discharging hole of the vertical stirrer is communicated with a second feeding hole of the horizontal stirrer, a plurality of first feeding holes inclined upwards by a preset angle are arranged on the side wall of the vertical stirrer, a circulating feeding hole of a circulating device is communicated with the bottom of the horizontal stirrer, and a circulating discharging hole of the circulating device is communicated with the upper part of the horizontal stirrer. The invention adopts a plurality of feeding devices, the vertical stirrer and the horizontal stirrer, the circulating device conveys the mixed dry powder at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer in the stirring process, continuous feeding can be realized, and after the plurality of dry powders are fully stirred by the vertical stirrer and the horizontal stirrer, the stirring device has the advantages of uniform stirring, high stirring efficiency, continuous feeding and the like.

Description

Method and equipment for continuously feeding and stirring dry powder
Technical Field
The invention relates to a dry powder continuous feeding and stirring method and equipment, in particular to a dry powder continuous feeding and stirring method and equipment suitable for thermal composite coating of dry powder of lithium battery electrodes.
Background
The existing coating of the lithium ion electrode adopts wet coating, and the wet coating is to mix the active material of the lithium ion battery with a corresponding organic solvent and then coat the active material on a substrate in a transfer coating or extrusion coating mode. After the coating, a long baking device is required to dry-bake the coated electrode to remove the organic solvent and water in the electrode active material. Such baked organic solvents, if not recovered, are directly discharged into the air, which may cause pollution to the air, and if recovered, may increase the user's capital investment and operating costs.
In order to solve the above problems, a method of directly coating with powder is proposed to achieve the purpose of avoiding the use of organic solvents, thus avoiding the subsequent baking process and avoiding the pollution of the organic solvents to the atmosphere; a method for manufacturing a lithium ion secondary battery as disclosed in chinese patent document CN103825050a belongs to such a method. If the powder coating method is required to directly produce the lithium ion electrode, the uniformity of the mixing of the positive electrode material or the negative electrode material of the lithium ion electrode directly affects the quality of the lithium ion electrode. Through the examined Chinese patent literature, no related dry powder continuous feeding and stirring method and equipment are found.
Disclosure of Invention
In order to overcome the problems, the invention provides a method and equipment for continuously feeding and stirring dry powder which is uniform and suitable for mixing positive electrode materials or negative electrode materials of a lithium ion electrode to society.
The technical scheme of the invention is as follows: the dry powder continuous feeding and stirring method comprises the following steps:
100. the plurality of feeding devices are used for rapidly spraying a plurality of dry powders upwards in an inclined manner at a preset angle from a plurality of first feeding holes on the side wall of the vertical mixer, and the vertical mixer is used for mixing a plurality of dry powders;
200. after stirring in the vertical stirrer for a preset time, conveying the mixed dry powder into a horizontal stirrer for stirring, and conveying the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer by a circulating device in the stirring process;
300. and after stirring in the horizontal stirrer for a preset time, outputting mixed dry powder from a second discharge hole of the horizontal stirrer.
As an improvement to the present invention, in the above step 100, the dry powders are rapidly sprayed obliquely upward onto an upper stirring structure located at the top of the vertical mixer, and the upper stirring structure stirs the dry powders.
As an improvement to the present invention, in the above step 100, when several kinds of dry powders fall back to the bottom of the vertical mixer, a lower stirring structure located at the bottom of the vertical mixer stirs it.
As an improvement to the present invention, in step 200 above, the blended dry powder falls substantially uniformly into the horizontal mixer from the upper portion of the horizontal mixer through a uniform powder falling structure.
As an improvement to the present invention, in step 200, the arcuate airflow structure blows the mixed dry powder up at the bottom of the horizontal mixer.
The other technical scheme of the invention is as follows: the dry powder continuous feeding and stirring equipment comprises a plurality of feeding devices, a vertical stirrer and a horizontal stirrer, wherein the feeding devices are communicated with a plurality of first feeding holes on the side wall of the vertical stirrer, a first discharging hole of the vertical stirrer is communicated with a second feeding hole of the horizontal stirrer, a plurality of first feeding holes inclined upwards by a preset angle are formed in the side wall of the vertical stirrer, a circulating feeding hole of a circulating device is communicated with the bottom of the horizontal stirrer, and a circulating discharging hole of the circulating device is communicated with the upper part of the horizontal stirrer;
the plurality of feeding devices are used for rapidly spraying a plurality of dry powders upwards in an inclined manner at a preset angle from the plurality of first feeding holes, and the vertical stirrer is used for stirring the plurality of dry powders; after stirring in the vertical stirrer for a preset time, conveying the mixed dry powder into a horizontal stirrer for stirring, and conveying the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer by the circulating device in the stirring process; and after stirring in the horizontal stirrer for a preset time, outputting mixed dry powder from a second discharge hole of the horizontal stirrer.
As an improvement of the invention, the vertical mixer comprises an upper mixing structure, the upper mixing structure is arranged on the top of the vertical mixer, a plurality of dry powders are obliquely and upwards sprayed onto the upper mixing structure, and the upper mixing structure is used for mixing a plurality of dry powders.
As an improvement of the invention, the vertical mixer further comprises a lower stirring structure, wherein the lower stirring structure is arranged on the bottom of the vertical mixer, and when a plurality of dry powders fall back to the bottom of the vertical mixer, the lower stirring structure stirs the dry powders.
As an improvement of the invention, the horizontal mixer further comprises a uniform powder falling structure, wherein the uniform powder falling structure is arranged on the horizontal mixer, the uniform powder falling structure is communicated with the second feed inlet, and mixed dry powder basically uniformly falls into the horizontal mixer from the upper part of the horizontal mixer through the uniform powder falling structure.
As an improvement on the invention, the dry powder stirring device also comprises an arc-shaped air flow structure, wherein a second air outlet pipeline of the arc-shaped air flow structure is arranged on the bottom of the horizontal stirrer, and the second air outlet pipeline blows up the mixed dry powder at the bottom of the horizontal stirrer.
According to the invention, as the plurality of feeding devices, the vertical stirrer and the horizontal stirrer are adopted, the plurality of feeding devices are communicated with the plurality of first feeding holes on the side wall of the vertical stirrer, the plurality of feeding devices spray the plurality of dry powders upwards and obliquely at a preset angle from the plurality of first feeding holes, and the vertical stirrer stirs the plurality of dry powders; after stirring for a preset time, the mixed dry powder is conveyed into the horizontal stirrer for stirring, in the stirring process, the circulating device conveys the mixed dry powder at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer, so that continuous feeding can be realized, and after the mixed dry powder is fully stirred by the vertical stirrer and the horizontal stirrer, the stirring device has the advantages of uniform stirring, high stirring efficiency, continuous feeding and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Wherein: 11. a supply container; 12. a feed conduit; 21. a vertical container; 22. a first feed port; 231. an upper rotation driving structure; 231. an upper rotation driving structure; 232. an upper rotating seat; 233. fixing the column; 234. a plurality of blades; 24. a first air supply device; 241. a first air outlet; 242. a first outlet pipe; 251. a lower rotation driving structure; 252. lower stirring paddles; 31. a horizontal container; 32. horizontal stirring blades; 33. a driving device; 4. a uniform powder falling structure; 41. a face mask; 42. an electric cylinder; 51. a circulation pump; 52. a circulation pipe; 100. a first delivery conduit; 101, a second conveying pipeline; 102. a first valve; 103. and a second valve.
Detailed Description
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or component to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of the two components. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.
The invention provides a dry powder continuous feeding and stirring method, which comprises the following steps:
100. the plurality of feeding devices are used for rapidly spraying a plurality of dry powders upwards in an inclined manner at a preset angle from a first feeding hole on the side wall of the vertical mixer, and the vertical mixer is used for mixing the plurality of dry powders;
200. after stirring in the vertical stirrer for a preset time, conveying the mixed dry powder into a horizontal stirrer for stirring, and conveying the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer by a circulating device in the stirring process;
300. and after stirring in the horizontal stirrer for a preset time, outputting mixed dry powder from a second discharge hole of the horizontal stirrer.
In the step 100 of the method, a plurality of dry powders are sprayed upwards from the peripheral side walls of the vertical mixer at a predetermined angle, the spraying angles of the dry powders are the same or different, and the first feeding openings are uniformly or unevenly arranged on the peripheral side walls of the vertical mixer.
In step 100 of the method, a plurality of dry powders are sprayed obliquely upward and rapidly onto an upper stirring structure positioned on top of the vertical mixer, the upper stirring structure stirring the plurality of dry powders. Specifically, a plurality of dry powders are sprayed onto the blades of the upper stirring structure obliquely and upwards, and a part of dry powders are impacted onto the arc surfaces of the blades and splashed everywhere; another part of the dry powder is carried by the blades and rotates together, and during the rotation, another part of the dry powder falls off the blades, i.e. another part of the dry powder falls off from different spatial positions and falls into different spatial positions of the vertical mixer.
In the above step 100 of the method, the first air supply device supplies air to the plurality of first air outlets provided on the side wall of the stand mixer, and the dried air is blown out from the plurality of first air outlets, and a whirling air flow is formed in the stand mixer, and the whirling air flow is formed in an ascending shape. And after the rising rotating airflow is encountered by the dry powder in the falling process, the dry powder rises and rotates along with the rotating airflow, and when the dry powder rises to the position where the upper stirring structure is arranged, the upper stirring structure stirs the dry powder again.
In the above step 100 of the method, when the dry powders fall back to the bottom of the vertical mixer, the lower stirring structure located at the bottom of the vertical mixer stirs the dry powders, and the stirring direction of the lower stirring structure is opposite to the stirring direction of the upper stirring structure, i.e. the stirring direction of the upper stirring structure is clockwise or anticlockwise, and the stirring direction of the lower stirring structure is anticlockwise or clockwise.
In step 200 of the method described above, the blended dry powder falls substantially uniformly into the horizontal mixer from the upper portion of the horizontal mixer through a uniform powder falling structure. Specifically, after the mixed dry powder is stirred in the vertical stirrer for a preset time, the mixed dry powder is conveyed into the uniform powder falling structure, and the uniform powder falling structure drives and rolls the mixed dry powder in the uniform powder falling structure back and forth and vibrates the mixed dry powder so that the mixed dry powder basically and uniformly falls into the horizontal stirrer.
In the above step 200 of the method, the horizontal mixer stirs the mixed dry powder falling into the horizontal mixer, and during the stirring process, the arc-shaped airflow structure blows the mixed dry powder located at the bottom of the horizontal mixer upwards. And the circulating device conveys the mixed dry powder at the bottom of the horizontal mixer from the outside of the horizontal mixer to the upper part of the horizontal mixer, namely, the circulating device conveys the mixed dry powder at the bottom of the horizontal mixer into the uniform powder falling structure, the mixed dry powder basically uniformly falls into the horizontal mixer through the uniform powder falling structure, and the horizontal mixer stirs the mixed dry powder again.
Referring to fig. 1, fig. 1 discloses a dry powder continuous feeding and stirring device, which comprises a plurality of feeding devices (not shown), a vertical stirrer (not shown) and a horizontal stirrer (not shown), wherein a first discharging port (not shown) of the vertical stirrer is communicated with a second feeding port (not shown) of the horizontal stirrer, a plurality of first feeding ports 22 inclining upwards by a preset angle are arranged on the side wall of the vertical stirrer, a circulating feeding port (not shown) of a circulating device is communicated with the bottom of the horizontal stirrer, and a circulating discharging port (not shown) of the circulating device is communicated with the upper part of the horizontal stirrer.
In this embodiment, the feeding device includes a feeding container 11 and a feeding pump (not shown), the shape of the feeding container 11 may be any shape, the feeding pump is a dry powder feeding pump, and the feeding container 11 and the feeding pump are prior art, so the structure thereof is not specifically explained herein.
In this embodiment, the number of the first feeding ports 22 is a plurality, and the plurality of first feeding ports 22 are uniformly disposed on the side wall of the vertical mixer, or the plurality of first feeding ports 22 are unevenly disposed on the side wall of the vertical mixer. The plurality of first feed inlets 22 are all or partially disposed at the same height of the sidewall of the vertical mixer, or the plurality of first feed inlets 22 are all or partially disposed at different heights of the sidewall of the vertical mixer. The plurality of first feed inlets 22 are inclined upward by a predetermined angle, wherein the predetermined angle is between greater than zero degrees and less than ninety degrees, the zero degrees are perpendicular to the side wall of the vertical mixer, all or part of the predetermined angles of the plurality of first feed inlets 22 inclined upward are the same, or all or part of the predetermined angles of the plurality of first feed inlets 22 inclined upward are different.
The discharge end of the feed pump is communicated with the first feed inlet 22 through a feed pipeline 12, the feed pump conveys the dry powder in the feed container 11 to the first feed inlet 22, the dry powder is sprayed out from the first feed inlet 22 in an inclined and upward mode at a preset angle, the spraying angles of a plurality of dry powders are the same or different, and the sprayed dry powder enters the vertical mixer. The types of dry powders ejected from each of the first feed inlets 22 are different, or at least two of the first feed inlets 22 eject the same dry powder.
In this embodiment, the vertical mixer includes a vertical container 21, where a sidewall of the vertical mixer is cylindrical, that is, the sidewall of the vertical container 21 is cylindrical, and a bottom plate (not identified) and a top plate (not identified) are respectively disposed at a bottom and a top of the vertical container 21. The first feeding port 22 is disposed on a side wall of the vertical container 21, and the first discharging port (not shown) is disposed on a bottom of the vertical container 21.
In this embodiment, the vertical mixer further includes an upper stirring structure (not identified), the upper stirring structure is disposed on the top of the vertical mixer, and the plurality of dry powders are obliquely and upwardly sprayed onto the upper stirring structure, and the upper stirring structure stirs the plurality of dry powders.
The upper stirring structure comprises an upper rotation driving structure 231, an upper rotating seat 232, a fixed column 233 and a plurality of blades 234, wherein the upper rotation driving structure 231 is arranged outside the vertical stirrer, the upper rotating seat 232, the fixed column 233 and the plurality of blades 234 are arranged inside the vertical stirrer, an upper rotating shaft of the upper rotation driving structure 231 penetrates through an upper perforation (not shown) at the top of the vertical container 21 and is connected with the upper rotating seat 232, and the fixed column 233 is arranged on the central position of the upper rotating seat 232. The upper rotation driving structure 231 employs a motor as a power source, and the upper rotation driving structure 231 is a related art, so that a detailed explanation of the structure thereof is not provided herein.
The cross section of the blade 234 is arc-shaped, the radian of the cross section of the blade 234 is less than or equal to ninety degrees, the arc-shaped area of the inner end of the blade 234 is large, the arc-shaped area of the outer end of the blade 234 is small, namely the inner end of the blade 234 is large, and the outer end of the blade 234 is small. The front projection of the blade 234 is in a straight shape, a curved shape, an arc shape or a bent shape, and the length of the front projection of the blade 234 is greater than, equal to or less than the radius of the upper rotating seat 232.
The inner ends of the blades 234 are fixed on the fixing posts 233, the upper sides of the blades 234 are fixedly connected with the upper rotating base 232, the part between the lower sides and the upper sides of the blades 234 is arc-shaped, and a plurality of the blades 234 are uniformly or unevenly arranged on the upper rotating base 232. The upper rotating shaft of the upper rotating driving structure 231 drives the upper rotating base 232 to rotate, and the upper rotating base 232 and the plurality of blades 234 synchronously rotate.
The dry powder is sprayed onto the upper stirring structure obliquely and rapidly, and the upper stirring structure stirs the dry powder. Specifically, a plurality of dry powders are sprayed onto the blades 234 obliquely upward and rapidly, and a part of the dry powders are impacted on the arc-shaped surfaces of the blades 234 to splash around; because the cross section of the blade 234 is arc-shaped, another part of dry powder is stored on the arc-shaped part of the blade 234, and the blade 234 rotates to carry another part of dry powder to rotate together, and during the rotation, another part of dry powder falls off the blade 234, namely, another part of dry powder falls off from different space positions and falls into different space positions of the vertical mixer.
In this embodiment, the first air supply device 24 is further included, the first air supply device 24 is disposed outside the stand mixer, and the first air supply device 24 is a very common structure, and a detailed description of the structure thereof will not be provided here.
A plurality of first air outlets 241 are arranged on the side wall of the vertical mixer, and the positions of the plurality of first air outlets 241 are lower than the positions of the plurality of first feed inlets 22, namely, the plurality of first air outlets 241 are positioned below the plurality of first feed inlets 22. The first air outlets 241 are uniformly arranged on the side wall of the vertical mixer, or the first air outlets 241 are unevenly arranged on the side wall of the vertical mixer. The first air outlets 241 are all or partially disposed at the same height of the sidewall of the vertical mixer, or the first air outlets 241 are all or partially disposed at different heights of the sidewall of the vertical mixer. The plurality of first air outlets 241 are inclined upwards by a predetermined angle, wherein the inclined predetermined angle is between more than zero degrees and less than ninety degrees, the zero degrees are perpendicular to the side wall of the vertical mixer, all or part of the inclined predetermined angles of the plurality of first air outlets 241 are the same, or all or part of the inclined predetermined angles of the plurality of first air outlets 241 are different. When viewed from the vertical direction (from top to bottom), the first air outlets 241 form an included angle with the inner radius of the vertical mixer, and the included angle ranges from greater than zero degrees to less than ninety degrees, that is, the air blown out from the first air outlets 241 is not blown to the central position of the vertical mixer, but is inclined upwards.
The air outlet end of the first air supply device 24 is communicated with the plurality of first air outlets 241 through a first air outlet pipeline 242, and the dried air is blown out from the plurality of first air outlets 241, and forms a rotating air flow in the vertical mixer, and the rotating air flow is in an ascending shape. And after the rising rotating airflow is encountered by the dry powder in the falling process, the dry powder rises and rotates along with the rotating airflow, and when the dry powder rises to the position where the upper stirring structure is arranged, the upper stirring structure stirs the dry powder again. A first exhaust hole (not shown) is formed in the top of the vertical container 21, a first filter screen (not shown) is arranged on the first exhaust hole, and the first exhaust hole is communicated with the air inlet end of the first air supply device 24 through a first exhaust pipeline (not shown).
In this embodiment, the vertical mixer further includes a lower stirring structure (not identified), which is disposed on the bottom of the vertical mixer, and when a plurality of dry powders fall back to the bottom of the vertical mixer, the lower stirring structure stirs the dry powders. The lower stirring structure comprises a lower rotary driving structure 251 and a lower stirring blade 252, the lower rotary driving structure 251 is arranged outside the vertical stirrer, and a lower rotating shaft of the lower rotary driving structure 251 penetrates through a lower through hole (not shown) at the bottom of the vertical stirrer to be connected with the lower stirring blade 252. The lower rotation shaft of the lower rotation driving structure 251 drives the lower stirring blade 252 to rotate, and the lower stirring blade 252 stirs a plurality of dry powders falling back to the bottom of the vertical mixer. The lower rotation driving structure 251 employs a motor as a power source, and the lower rotation driving structure 251 is a related art, so that a detailed explanation of the structure thereof is not provided herein.
In this embodiment, the horizontal mixer includes a horizontal container 31 and a horizontal stirring device (not labeled), a horizontal stirring blade 32 of the horizontal stirring device is disposed in the horizontal container 31, a driving device 33 of the horizontal stirring device is disposed outside the horizontal container 31, a second feeding port is disposed on the top of the horizontal container 31, and a second discharging port is disposed on the bottom of the horizontal container 31.
In this embodiment, the apparatus further includes a first conveying pipe 100, one end of the first conveying pipe 100 is communicated with the first discharge port of the vertical container 21, the other end of the first conveying pipe 100 is communicated with the second feed port of the horizontal container 31, and a first valve 102 is disposed on the first conveying pipe 100.
The device also comprises a second conveying pipeline 101, one end of the second conveying pipeline 101 is communicated with a second discharge hole of the horizontal container 31, and a second valve 103 is arranged on the second conveying pipeline.
In this embodiment, the horizontal mixer further comprises a uniform powder falling structure 4, the uniform powder falling structure 4 is arranged on the horizontal mixer, the uniform powder falling structure 4 is communicated with the second feeding port, and the mixed dry powder basically uniformly falls into the horizontal mixer from the upper part of the horizontal mixer through the uniform powder falling structure 4.
The even powder falling structure 4 comprises a face mask 41, an electric cylinder 42, a rolling plate (not shown), a vibrating motor (not shown), a linear guide rail (not shown) and a sliding block (not shown), wherein the length of the face mask 41 is larger than or equal to that of the horizontal container 31, the face mask 41 is covered on the outer wall of the top of the horizontal container 31, the vibrating motor is arranged on the outer wall of the horizontal container 31, the linear guide rail is arranged on the inner wall of the face mask 41, the sliding block is arranged on the linear guide rail, the rolling plate is connected with the sliding block, the electric cylinder 42 is arranged outside one end of the face mask 41, and the driving end of the electric cylinder 42 penetrates through a hole in the face mask 41 to be connected with the rolling plate. Inside the mask 41, a number of through holes (not shown) are provided in the top side wall of the horizontal container 31, and the electric cylinder 42 may be replaced by a pneumatic cylinder or a hydraulic cylinder.
The second feeding port is formed in the face mask 41, mixed dry powder enters the face mask 41 from the second feeding port, the driving end of the electric cylinder 42 drives the rolling plate to slide back and forth on the linear guide rail, namely, the rolling plate moves back and forth in the face mask 41, the rolling plate rolls back and forth the mixed dry powder in the face mask 41, and the mixed dry powder uniformly falls into the horizontal mixer from a plurality of through holes. During the process of rolling the mixed dry powder in the mask 41 back and forth by the rolling plate, the vibration motor vibrates the outer wall of the horizontal container 31, so that the mixed dry powder more easily falls into the horizontal mixer from the plurality of through holes uniformly.
In this embodiment, the circulating device includes a circulating pump 51 and two circulating pipes 52, and the circulating pump 51 is a dry powder circulating pump 51. A circulation feed hole (not shown) is provided on the bottom of the horizontal container 31, and a circulation discharge hole (not shown) is provided on the top of the horizontal container 31. The circulating inlet of the circulating device is communicated with the circulating inlet hole at the bottom of the horizontal mixer through a circulating pipeline 52, and the circulating outlet of the circulating device is communicated with the circulating outlet hole at the top of the horizontal mixer through another circulating pipeline 52. The circulation device is arranged outside the horizontal mixer, namely the circulation pump 51 and the two circulation pipes 52 are arranged outside the horizontal mixer.
In this embodiment, the device further comprises an arc-shaped air flow structure (not shown), wherein a second air outlet pipeline of the arc-shaped air flow structure is arranged on the bottom of the horizontal mixer, and the second air outlet pipeline blows up the mixed dry powder at the bottom of the horizontal mixer.
The arc air current structure includes second air feeder (not shown) and a plurality of second air outlet pipe (not shown) be provided with a plurality of fixed perforation (not shown) on the lateral wall of horizontal container 31, second air feeder sets up on the outer wall of horizontal container 31, a plurality of second air outlet pipe's one end with second air feeder intercommunication, a plurality of second air outlet pipe's the other end passes a plurality of fixed perforation, a plurality of second air outlet pipe's the other end becomes the arc setting and is in on the arc inner wall of horizontal container 31, a plurality of second air outlet pipe's the other end the tip is located on the interior bottom surface of horizontal container 31. A second exhaust hole is formed in the middle of the horizontal container 31, a second filter screen is arranged on the second exhaust hole, and the second exhaust hole is communicated with the air inlet end of the second air supply device through a second exhaust pipeline.
The working principle of the embodiment is as follows: the first valve 102 is closed and the second valve 103 is closed, the dry powder in the feeding container 11 is pumped into the first feeding hole 22 by the feeding pump, and a plurality of dry powders are sprayed onto the upper stirring structure from a plurality of first feeding holes 22 obliquely upwards. A portion of the dry powder impinges on the arcuate surface of the blade 234, splashing around; another portion of the dry powder is carried by the blades 234 and rotates therewith, during which another portion of the dry powder falls off the blades 234, i.e. another portion of the dry powder falls off from different spatial locations into different spatial locations of the stand mixer.
The first air supply device 24 supplies air to the plurality of first air outlets 241, and dry air is blown out from the plurality of first air outlets 241, thereby forming a rotating air flow in the vertical mixer, and the rotating air flow is in a rising shape. And after the rising rotating airflow is encountered by the dry powder in the falling process, the dry powder rises and rotates along with the rotating airflow, and when the dry powder rises to the position where the upper stirring structure is arranged, the upper stirring structure stirs the dry powder again. When a plurality of dry powders fall back to the bottom of the vertical mixer, the lower stirring structure stirs the dry powders, and the stirring direction of the lower stirring structure is opposite to that of the upper stirring structure.
After the dry powders are stirred in the vertical mixer for a predetermined time, the first valve 102 is opened, and the mixed dry powder enters the uniform powder falling structure 4. The mixed dry powder in the uniform powder falling structure 4 is driven to roll and vibrate back and forth, so that the mixed dry powder basically and uniformly falls into the horizontal stirrer, and the horizontal stirrer stirs the mixed dry powder.
In the stirring process, the circulating device conveys mixed dry powder at the bottom of the horizontal stirrer to the uniform powder falling structure 4, the mixed dry powder falls into the horizontal stirrer basically uniformly through the uniform powder falling structure 4 again, and the horizontal stirrer stirs the mixed dry powder again. And the arc-shaped airflow structure blows the mixed dry powder at the bottom of the horizontal mixer upwards.
After stirring in the horizontal mixer for a predetermined time, the second valve 103 is opened, and the mixed dry powder is output from the second discharge port of the horizontal mixer.
According to the invention, as the feeding devices, the vertical stirrer and the horizontal stirrer are adopted, the feeding devices are communicated with the first feeding holes on the side wall of the vertical stirrer, the feeding devices spray out dry powder upwards from the first feeding holes in an inclined way at a preset angle, and the vertical stirrer stirs the dry powder; after stirring for a preset time, the mixed dry powder is conveyed into a horizontal stirrer for stirring, in the stirring process, the circulating device conveys the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer, so that continuous feeding can be realized, and after the vertical stirrer and the horizontal stirrer are fully stirred, the mixed dry powder stirring device has the advantages of uniform stirring, high stirring efficiency, continuous feeding and the like.

Claims (6)

1. A method for continuously feeding and stirring dry powder, which is characterized by comprising the following steps:
100. the plurality of feeding devices are used for rapidly spraying a plurality of dry powders upwards in an inclined manner at a preset angle from a plurality of first feeding holes on the side wall of the vertical mixer, and the vertical mixer is used for mixing a plurality of dry powders;
200. after stirring in the vertical stirrer for a preset time, conveying the mixed dry powder into a horizontal stirrer for stirring, and conveying the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer by a circulating device in the stirring process;
300. after stirring in the horizontal stirrer for a preset time, outputting mixed dry powder from a second discharge port of the horizontal stirrer;
in the step 100, a plurality of dry powders are sprayed onto an upper stirring structure positioned at the top of the vertical stirrer in an inclined and upward manner, and the upper stirring structure is used for stirring the plurality of dry powders;
in the step 100, when the dry powders fall back to the bottom of the vertical mixer, the lower stirring structure positioned at the bottom of the vertical mixer stirs the dry powders, and the stirring direction of the lower stirring structure is opposite to the stirring direction of the upper stirring structure.
2. The continuous feeding and stirring method of dry powder according to claim 1, wherein: in the step 200, the blended dry powder falls substantially uniformly into the horizontal mixer from the upper portion of the horizontal mixer through a uniform powder falling structure.
3. The continuous feeding and stirring method of dry powder according to claim 2, wherein: in step 200, an arcuate airflow structure blows the mixed dry powder up at the bottom of the horizontal mixer.
4. A dry powder continuous feeding and stirring device, which is characterized in that: the device comprises a plurality of feeding devices, a vertical stirrer and a horizontal stirrer, wherein the feeding devices are communicated with a plurality of first feeding holes on the side wall of the vertical stirrer, a first discharging hole of the vertical stirrer is communicated with a second feeding hole of the horizontal stirrer, a plurality of first feeding holes inclined upwards by a preset angle are formed in the side wall of the vertical stirrer, a circulating feeding hole of a circulating device is communicated with the bottom of the horizontal stirrer, and a circulating discharging hole of the circulating device is communicated with the upper part of the horizontal stirrer;
the plurality of feeding devices are used for rapidly spraying a plurality of dry powders upwards in an inclined manner at a preset angle from the plurality of first feeding holes, and the vertical stirrer is used for stirring the plurality of dry powders; after stirring in the vertical stirrer for a preset time, conveying the mixed dry powder into a horizontal stirrer for stirring, and conveying the mixed dry powder positioned at the bottom of the horizontal stirrer to the upper part of the horizontal stirrer by the circulating device in the stirring process; after stirring in the horizontal stirrer for a preset time, outputting mixed dry powder from a second discharge port of the horizontal stirrer;
the vertical stirrer comprises an upper stirring structure, the upper stirring structure is arranged on the top of the vertical stirrer, a plurality of dry powders are obliquely and upwards sprayed onto the upper stirring structure, and the upper stirring structure is used for stirring a plurality of dry powders;
the vertical mixer still includes down stirring structure, lower stirring structure sets up on the bottom of vertical mixer, when a plurality of dry powder fall back to the bottom of vertical mixer, lower stirring structure stirs it, lower stirring structure's stirring direction with go up stirring structure's stirring direction is opposite.
5. The continuous dry powder feeding and stirring apparatus of claim 4, wherein: the horizontal mixer is characterized by further comprising a uniform powder falling structure, wherein the uniform powder falling structure is arranged on the horizontal mixer, the uniform powder falling structure is communicated with the second feeding port, and mixed dry powder basically and uniformly falls into the horizontal mixer from the upper part of the horizontal mixer through the uniform powder falling structure.
6. The continuous dry powder feeding and stirring apparatus of claim 4, wherein: the dry powder stirring device is characterized by further comprising an arc-shaped air flow structure, wherein a second air outlet pipeline of the arc-shaped air flow structure is arranged on the bottom of the horizontal stirrer, and the second air outlet pipeline blows up mixed dry powder at the bottom of the horizontal stirrer.
CN201810016943.1A 2018-01-09 2018-01-09 Method and equipment for continuously feeding and stirring dry powder Active CN108057384B (en)

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CN112453425A (en) * 2020-11-20 2021-03-09 安徽哈特三维科技有限公司 Powder falling device of selective laser melting forming equipment

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CN102120142A (en) * 2010-12-22 2011-07-13 浙江天蓝环保技术有限公司 Direct injection ash supplying device in dry powder desulfurizing agent tower
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