Slurry premixing apparatus and pulp making system

Abstract

The present disclosure provides a slurry premixing device and a pulp making system. The slurry premixing device comprises a driving mechanism, a screw feeding mechanism and a pre-dispersing mechanism. The driving mechanism comprises a driving assembly and a driving shaft, and the driving shaft is connected to the power output end of the driving assembly. The screw feeding mechanism comprises a feeding cylinder and a screw pushing blade. The feeding cylinder is provided with a feeding channel. The first end of the feeding cylinder is provided with a powder inlet and a solvent inlet, and both the powder inlet and the solvent inlet are in communication with the first end of the feeding channel. The driving shaft is arranged in the feeding channel, and the screw pushing blade is arranged in the feeding channel and fixedly connected to the driving shaft. The pre-dispersing mechanism comprises a pre-dispersing cylinder and a shearing assembly. The first end of the pre-dispersing cylinder is connected to the second end of the feeding cylinder. The pre-dispersing cylinder is provided with a pre-dispersing channel, and the inlet end of the pre-dispersing channel is in communication with the outlet end of the feeding channel. The driving shaft is also arranged in the pre-dispersing channel, and the shearing assembly is arranged in the pre-dispersing channel and fixedly connected to the driving shaft. In this way, pipe blockage is avoided.

Description

Technical Field

[0001] This disclosure relates to the technical field of pulping systems, and in particular to a pulp premixing device and a pulping system. Background Technology

[0002] A slurry is typically prepared by mixing solid powders and solvents using a slurry preparation system, such as a battery slurry.

[0003] In the related technology, CN215428551U discloses a pulping system in which the outlet of the pulp buffer tank is connected to the inlet of the disperser through a pulp delivery pump. The outlet of the disperser is connected to the inlet of the pulp buffer tank through a first pipeline. The pulp delivery pump delivers the pulp from the pulp buffer tank to the disperser, and then the pulp is thrown out by the impeller in the disperser and returned to the pulp buffer tank through the first pipeline. In this way, the pulp circulates back and forth between the pulp buffer tank and the disperser.

[0004] CN116422177A discloses a pulping device and system. After the slurry enters the first sub-cavity through the inlet, a portion of the slurry enters the first and second shear channels. A drive shaft drives the annular cylinder of the pre-dispersion cylinder to rotate at high speed, shearing the slurry in the first and second shear channels to form a mixture. Simultaneously, the drive shaft drives an impeller in the second sub-cavity to rotate at high speed. The high-speed rotation of the impeller generates an attractive force, drawing the mixture from the first and second shear channels through the second mixture channel, then through the first mixture channel, and finally into the third shear channel within the second sub-cavity. The impeller stirs the mixture entering the third shear channel. After stirring, the mixture flows out of the shell through the outlet. When the mixture accumulates in the second sub-cavity, a portion of the mixture, under the influence of gravity, flows from the third shear channel through the first mixture channel, then through the second mixture channel, and finally into the first and second shear channels, where it is sheared by the annular cylinder. In this way, the mixture can circulate between the first and second sub-cavities, and can be repeatedly stirred and dispersed.

[0005] CN219682193U discloses a pulping system in which a buffer tank is disposed between a disperser and a first regulating element. The conveying pipe assembly also includes a third conveying pipe. The inlet of the buffer tank is connected to the outlet of the disperser through the third conveying pipe, and the outlet of the buffer tank is connected to the circulation inlet of the circulation tank through a second conveying pipe. The slurry output from the outlet of the disperser enters the circulation tank through the third conveying pipe, the buffer tank, and the second conveying pipe. The slurry in the circulation tank is returned to the disperser through the first conveying pipe.

[0006] It should be noted that, after diligently performing the inventiveness search of this solution, the following technical documents are also provided for reference:

[0007] 1. CN105561858B - Control system for automatically adjusting the viscosity of lithium battery slurry;

[0008] 2. CN103446937A - An automatic pulping system.

[0009] However, the technical solutions disclosed in the aforementioned technical documents only disperse the slurry using a disperser, resulting in poor mixing of powder and solvent, making the disperser prone to pipe blockage and affecting the normal production of the slurry. Summary of the Invention

[0010] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a slurry premixing device and slurry preparation system that avoids pipe blockage.

[0011] The purpose of this disclosure is achieved through the following technical solution:

[0012] A slurry premixing device, comprising:

[0013] Base;

[0014] A drive mechanism includes a drive assembly and a drive shaft, wherein the drive assembly is mounted on the base and the drive shaft is connected to the power output end of the drive assembly;

[0015] A spiral feeding mechanism includes a feed cylinder and spiral pusher blades. The feed cylinder is mounted on the machine base and has a feed channel. A powder inlet and a solvent inlet are located at the first end of the feed cylinder, both communicating with the first end of the feed channel. A drive shaft passes through the feed channel, and the spiral pusher blades are located within the feed channel and fixedly connected to the drive shaft.

[0016] A pre-dispersion mechanism includes a pre-dispersion cylinder and a shearing assembly. The first end of the pre-dispersion cylinder is connected to the second end of the feed cylinder. The pre-dispersion cylinder has a pre-dispersion channel, and the inlet end of the pre-dispersion channel is connected to the outlet end of the feed channel. The drive shaft also passes through the pre-dispersion channel, and the shearing assembly is located in the pre-dispersion channel and fixedly connected to the drive shaft.

[0017] In one embodiment, the shearing assembly includes a plurality of dispersing members, which are spaced apart along the extension direction of the drive shaft, and each dispersing member is fixedly connected to the drive shaft.

[0018] In one embodiment, each of the dispersing elements includes a plurality of dispersing teeth, which are arranged circumferentially around the drive shaft.

[0019] In one embodiment, the surface of each of the dispersion teeth is provided with a plurality of spaced-apart shear edges.

[0020] In one embodiment, each of the shearing edges has an angle with the extension direction of the drive shaft.

[0021] In one embodiment, the pre-dispersion mechanism further includes a plurality of spaced scraping components, each of which is located within the pre-dispersion channel and fixedly connected to the pre-dispersion cylinder, with one scraping component disposed between two adjacent dispersing components.

[0022] In one embodiment, each of the scraping components includes scraping teeth located within the pre-dispersion channel. A first end of the scraping tooth is fixedly connected to the pre-dispersion cylinder, and a second end of the scraping tooth is disposed adjacent to the root of the corresponding dispersion tooth. A gap exists between the second end of the scraping tooth and the drive shaft.

[0023] In one embodiment, each of the scraping components includes one scraping tooth, and a plurality of the scraping teeth are spaced apart along the extension direction of the pre-dispersion channel.

[0024] In one embodiment, the pre-dispersion mechanism further includes a discharge pipe, the inlet end of which is connected to the outlet end of the pre-dispersion channel.

[0025] In one embodiment, the feed cylinder has an air inlet hole that is connected to the feed channel, and the slurry premixing equipment further includes an air blowing mechanism whose air outlet is connected to the air inlet hole.

[0026] In one embodiment, the air blowing mechanism includes a compressed air tank, an air supply pipe, and a switch valve. The air inlet end of the air supply pipe is connected to the compressed air tank, the air outlet end of the air supply pipe is connected to the air inlet, and the switch valve is disposed on the air supply pipe.

[0027] In one embodiment, there are multiple air inlets, which are spaced apart along the extension direction of the drive shaft; there are multiple air supply pipes, which are connected to the multiple air inlets in a one-to-one correspondence; and there are multiple switching valves, which are disposed on the multiple air supply pipes in a one-to-one correspondence.

[0028] A pulping system includes the pulp premixing equipment described in any of the above embodiments, the pulping system further includes a disperser, the inlet of the disperser being connected to the outlet of the predispersing channel.

[0029] In one embodiment, the pulping system further includes a storage component, the storage component comprising:

[0030] The first storage tank has its inlet end connected to the outlet end of the disperser, and the outlet end of the first storage tank is connected to the inlet end of the disperser.

[0031] The first feed valve is located at the feed inlet end of the first storage tank;

[0032] The first discharge valve is located at the discharge end of the first storage tank;

[0033] The second storage tank; the inlet of the second storage tank is connected to the outlet of the disperser, and the outlet of the second storage tank is connected to the inlet of the disperser.

[0034] The second feed valve is located at the feed inlet of the second storage tank;

[0035] A second discharge valve is installed at the discharge end of the second storage tank; and

[0036] A slurry pump is installed at the feed end of the disperser.

[0037] In one embodiment, the dispersion of the disperser is controlled by a distributed control method, the distributed control method comprising:

[0038] S100: The slurry is dispersed by the disperser, and the first feed valve and the first discharge valve are opened, while the second feed valve and the second discharge valve are closed, so that the slurry dispersed by the disperser enters the first storage tank.

[0039] S300: The slurry from the first storage tank is pumped into the disperser by the slurry pump;

[0040] S500: The slurry is dispersed by the disperser, and the first feed valve and the first discharge valve are closed, while the second feed valve and the second discharge valve are opened, so that the slurry dispersed by the disperser enters the second storage tank;

[0041] S700: The slurry from the second storage tank is pumped into the disperser by the slurry pump;

[0042] S900: Repeat S100 to S700 in a cyclical manner to allow the slurry to be stored alternately in the first storage tank and the second storage tank, and to allow the disperser to disperse the slurry multiple times.

[0043] Compared with the prior art, this disclosure has at least the following advantages:

[0044] The powder and solvent are first added into the feed channel to mix and form a slurry. The drive assembly drives the spiral pusher blades to rotate via the drive shaft. The spiral pusher blades push the slurry through the feed channel and the pre-dispersion channel before it is discharged. Since the drive assembly also drives the shearing assembly to rotate via the drive shaft, the shearing assembly will shear the slurry when it passes through the pre-dispersion channel, thus pre-dispersing the slurry. The pre-dispersed slurry is then transported to the disperser for circulation dispersion. Because the shearing assembly has already refined the slurry during pre-dispersion, it avoids the problem of clogging the pipes at the disperser, ensuring the normal operation of the disperser. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the structure of a pulping system according to one embodiment;

[0047] Figure 2 for Figure 1 The diagram shows the structure of the pulp premixing equipment in the pulping system.

[0048] Figure 3 for Figure 1 A schematic diagram of the pulp premixing equipment of the pulping system shown from another perspective;

[0049] Figure 4 for Figure 1 A cross-sectional view of the pulp premixing equipment in the pulping system shown.

[0050] Figure 5 for Figure 1 A partial cross-sectional view of the pulp premixing equipment in the pulping system shown;

[0051] Figure 6 for Figure 1 A partial structural schematic diagram of the pulp premixing equipment in the pulping system is shown.

[0052] Figure 7 for Figure 1 Another partial structural schematic diagram of the pulp premixing equipment in the pulping system shown;

[0053] Figure 8 for Figure 1 Another partial structural schematic diagram of the pulp premixing equipment in the pulping system shown;

[0054] Figure 9for Figure 8 The slurry premixing equipment shown is a cross-sectional view along line AA.

[0055] Reference numerals: Pulping system 10; Pulp premixing equipment 10a; Base 100; Drive mechanism 200; Drive assembly 210; Drive shaft 220; Screw feeding mechanism 300; Feed cylinder 310; Feed channel 311; Powder inlet 312; Solvent inlet 313; Air inlet 314; Screw pusher blades 320; Pre-dispersion mechanism 400; Pre-dispersion cylinder 410; Pre-dispersion channel 411; Coarse dispersion zone 411a; Fine dispersion zone 411b; Shearing assembly 420; Dispersion component 421; Coarse dispersion component 421a; Fine dispersion component 421b; Dispersion teeth 4211; Shearing edge 4 211a; scraper assembly 430; scraper teeth 431; elastic scraper 440; discharge pipe 450; cooling assembly 460; cooling jacket 461; mounting cavity 4611; spiral guide vane 462; cooling channel 4601; liquid inlet 4602; liquid outlet 4603; air blowing mechanism 500; compressed air storage tank 510; air supply pipe 520; switch valve 530; storage assembly 600; first storage tank 610; first feed valve 620; first discharge valve 630; second storage tank 640; second feed valve 650; second discharge valve 660; slurry pump 670; disperser 10b. Detailed Implementation

[0056] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable the reader to gain a more thorough and complete understanding of the contents of this disclosure.

[0057] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0060] like Figure 1 As shown, a pulping system 10 in one embodiment includes a pulp premixing device 10a and a disperser 10b, with the inlet of the disperser 10b connected to the outlet of the pulp premixing device 10a. In this embodiment, the mixture of powder and solvent is first dispersed by the pulp premixing device and the disperser 10b.

[0061] like Figures 2 to 4 As shown, in one embodiment, the slurry premixing device 10a includes a base 100, a drive mechanism 200, a screw feeding mechanism 300, and a pre-dispersion mechanism 400. The drive mechanism 200 includes a drive assembly 210 and a drive shaft 220. The drive assembly 210 is mounted on the base 100, and the drive shaft 220 is connected to the power output end of the drive assembly 210. The drive assembly 210 is used to drive the drive shaft 220 to rotate. The screw feeding mechanism 300 includes a feed cylinder 310 and screw pusher blades 320. The feed cylinder 310 is mounted on the base 100 and has a feed channel 311. The first end of the feed cylinder 310 has a powder inlet 312 and a solvent inlet 313, both of which are connected to the first end of the feed channel 311. Powder enters the feed channel 311 through the powder inlet 312, and solvent enters the feed channel 311 through the solvent inlet 313, causing the powder and solvent to mix and form a slurry within the feed channel 311. The discharge end of the feed channel 311 is located at the second end of the feed channel 311. The drive shaft 220 passes through the feed channel 311, and the spiral pusher blade 320 is located inside the feed channel 311 and fixedly connected to the drive shaft 220. The drive shaft 220 is used to drive the spiral pusher blade 320 to rotate, so that the spiral pusher blade 320 pushes the slurry through the feed channel 311.

[0062] like Figure 5As shown, the pre-dispersion mechanism 400 further includes a pre-dispersion cylinder 410 and a shearing assembly 420. The first end of the pre-dispersion cylinder 410 is connected to the second end of the feed cylinder 310. The pre-dispersion cylinder 410 has a pre-dispersion channel 411, with the inlet end of the pre-dispersion channel 411 connected to the outlet end of the feed channel 311. Under the push of the spiral pusher blades 320, the slurry passes sequentially through the feed channel 311 and the pre-dispersion channel 411. A drive shaft 220 also passes through the pre-dispersion channel 411. The shearing assembly 420 is located within the pre-dispersion channel 411 and fixedly connected to the drive shaft 220. The drive shaft 220 also drives the shearing assembly 420 to rotate, causing the shearing assembly 420 to shear the slurry as it passes through the pre-dispersion channel 411, thus achieving the effect of pre-dispersion. The outlet of the pre-dispersion channel 411 is connected to the inlet of the disperser 10b, allowing the pre-dispersioned slurry to be transported to the disperser 10b.

[0063] like Figures 2 to 5 As shown, in this embodiment, when the slurry premixing equipment 10a is working, the powder is first conveyed to the powder inlet 312 and the solvent is conveyed to the solvent inlet 313, so that the powder and solvent are mixed in the feed channel 311 to form a slurry. Then, the drive assembly 210 is started, so that the power output end of the drive assembly 210 drives the spiral pusher blade 320 and the shear assembly 420 to rotate through the drive shaft 220. Under the push of the spiral pusher blade 320, the slurry passes through the feed channel 311 and the pre-dispersion channel 411 in sequence. When the slurry passes through the pre-dispersion channel 411, the shear assembly 420 performs a shearing operation on the slurry, so that the shear assembly 420 pre-disperses the slurry. Under the push of the spiral pusher blade 320, the pre-dispersed slurry is discharged through the discharge end of the pre-dispersion channel 411 and then conveyed to the disperser 10b for circulation dispersion.

[0064] In the aforementioned slurry premixing equipment 10a, powder and solvent are first added into the feed channel 311 to mix and obtain a slurry. Since the drive component 210 drives the spiral pusher blade 320 to rotate via the drive shaft 220, the spiral pusher blade 320 can push the slurry through the feed channel 311 and the pre-dispersion channel 411 and then discharge it. Since the drive component 210 also drives the shear component 420 to rotate via the drive shaft 220, when the slurry passes through the pre-dispersion channel 411, the shear component 420 will shear the slurry, so that the slurry is pre-dispersed. The pre-dispersed slurry is then transported to the disperser 10b for circulating dispersion. Since the shear component 420 has already refined the slurry during pre-dispersion, the problem of slurry blockage at the disperser 10b is avoided, ensuring the normal operation of the disperser 10b.

[0065] like Figure 5As shown, in one embodiment, the shearing assembly 420 includes a plurality of dispersing members 421, which are spaced apart along the extension direction of the drive shaft 220. Each dispersing member 421 is fixedly connected to the drive shaft 220, and the drive shaft 220 drives each dispersing member 421 to rotate. In this embodiment, when the slurry passes through the pre-dispersion channel 411, the drive shaft 220 drives each dispersing member 421 to rotate, and the plurality of dispersing members 421 shear the slurry to achieve the effect of pre-dispersing the slurry.

[0066] like Figure 6 As shown, in one embodiment, each dispersing member 421 includes a plurality of dispersing teeth 4211, which are arranged circumferentially around the drive shaft 220 at intervals. The drive shaft 220 drives each dispersing tooth 4211 to rotate. In this embodiment, the shearing assembly 420 has a plurality of dispersing teeth 4211, which shear the slurry to achieve the effect of pre-dispersing the slurry.

[0067] like Figure 6 As shown, in one embodiment, each dispersing tooth 4211 has a plurality of spaced-apart shearing edges 4211a on its surface. In this embodiment, when the slurry passes through the pre-dispersion channel 411, the drive shaft 220 drives the dispersing tooth 4211 to rotate, so that the shearing edges 4211a of the dispersing tooth 4211 cut the slurry to achieve the effect of pre-dispersing the slurry.

[0068] like Figure 6 As shown, in one embodiment, each shearing edge 4211a has an angle with the extension direction of the drive shaft 220, such that each shearing edge 4211a can shear the slurry when the drive shaft 220 rotates.

[0069] like Figure 5 and Figure 6As shown, in one embodiment, the pre-dispersion channel 411 includes a coarse dispersion zone 411a and a fine dispersion zone 411b that are interconnected. The coarse dispersion zone 411a is connected to the discharge end of the feed channel 311. The plurality of dispersion elements 421 includes a plurality of coarse dispersion elements 421a and a plurality of fine dispersion elements 421b. The plurality of coarse dispersion elements 421a are spaced apart along the extension direction of the drive shaft 220 and are fixedly connected to the drive shaft 220. The plurality of fine dispersion elements 421b are spaced apart along the extension direction of the drive shaft 220 and are fixedly connected to the drive shaft 220. The distance between any two adjacent coarse dispersion elements 421a is greater than the distance between any two adjacent fine dispersion elements 421b. In this embodiment, the distance between two adjacent coarse dispersing elements 421a is relatively large, so that multiple coarse dispersing elements 421a perform preliminary pre-dispersion of the slurry. The distance between two adjacent fine dispersing elements 421b is relatively small, so that multiple fine dispersing elements 421b perform finer pre-dispersion of the slurry. In this way, the slurry undergoes coarse dispersion and fine dispersion in the pre-dispersion element 421 in sequence, thereby improving the pre-dispersion effect of the slurry.

[0070] In another embodiment, the distance between two adjacent dispersing members 421 gradually decreases along the extension direction of the drive shaft 220, making the dispersing members 421 gradually denser along the extension direction of the drive shaft 220, thereby gradually strengthening the pre-dispersion effect of the shearing assembly 420 on the slurry and improving the pre-dispersion effect.

[0071] It is understandable that, due to the viscosity of the slurry, it will adhere to the drive shaft 220, that is, the slurry will accumulate on the drive shaft 220, causing the accumulated material to clump around the shaft and the dispersing component 421. This will reduce the shearing effect of the dispersing component 421 and increase the waste of slurry. Therefore, in order to ensure the pre-dispersion effect and reduce slurry waste, it is necessary to scrape off the accumulated material on the drive shaft 220.

[0072] In order to scrape off the accumulated material on the drive shaft 220, such as Figure 5 As shown, in one embodiment, the pre-dispersion mechanism 400 further includes a plurality of spaced-apart scraping components 430. Each scraping component 430 is located within the pre-dispersion channel 411 and is fixedly connected to the pre-dispersion cylinder 410. A scraping component 430 is disposed between two adjacent dispersing elements 421. In this embodiment, while the dispersing elements 421 are shearing the slurry, due to the rotation of the drive shaft 220, each scraping component 430 moves circumferentially along the drive shaft 220, causing the scraping components 430 to scrape away most of the accumulated material on the drive shaft 220, thus suppressing the problem of material accumulation on the drive shaft 220, that is, suppressing the problem of powder agglomeration and wrapping around the shaft and the dispersing elements 421, improving the dispersion effect of the dispersing elements 421, and reducing slurry waste.

[0073] like Figure 5As shown, in one embodiment, each scraping assembly 430 includes scraping teeth 431 located within the pre-dispersion channel 411. The first end of the scraping teeth 431 is fixedly connected to the pre-dispersion cylinder 410, and the second end of the scraping teeth 431 is disposed adjacent to the root of the corresponding dispersing teeth 4211. A gap exists between the second end of the scraping teeth 431 and the drive shaft 220. In this embodiment, scraping teeth 431 are present between two adjacent dispersing elements 421. By scraping away the accumulated material between the corresponding two adjacent dispersing teeth 4211 using the scraping teeth 431 of each scraping assembly 430, the material accumulation problem on the drive shaft 220 is suppressed, ensuring the pre-dispersion effect of the dispersing elements 421 and reducing slurry waste.

[0074] like Figure 5 and Figure 7 As shown, in one embodiment, each scraping assembly 430 includes a scraping tooth 431, and multiple scraping teeth 431 are spaced apart along the extension direction of the pre-dispersion channel 411. In this embodiment, a scraping tooth 431 is provided between two adjacent dispersing elements 421, which suppresses the problem of material accumulation during drive and also reduces the space occupied by the scraping assembly 430, making the scraping assembly 430 have less impact on the flowability of the slurry. Of course, in another embodiment, each scraping assembly 430 may also include multiple scraping teeth 431 to further improve the scraping effect and reduce slurry waste.

[0075] It is understandable that in order to avoid interference between the scraper tooth 431 and the drive shaft 220, there is a gap between the second end of the scraper tooth 431 and the drive shaft 220. However, even with the gap between the second end of the scraper tooth 431 and the drive shaft 220, there will still be a small amount of material accumulation, which means that there is still room for improvement in the dispersion effect of the scraper tooth 431, and there is still little room for material waste.

[0076] Therefore, as Figure 7As shown, in one embodiment, the pre-dispersing mechanism 400 further includes a plurality of elastic scraping elements 440, each corresponding to one of the second ends of a plurality of scraping teeth 431. The elastic scraping elements 440 also abut against the drive shaft 220, such that each elastic scraping element 440 is positioned between the corresponding scraping tooth 431 and the drive shaft 220. In this embodiment, because the elastic scraping elements 440 are elastic, even if the elastic scraping elements 440 abut against the drive shaft 220, the elastic scraping elements 440 will not interfere with the drive shaft 220. When the drive shaft 220 rotates, the elastic scraper 440 and the scraper teeth 431 work together to scrape away the accumulated material on the drive shaft 220. Since each elastic scraper 440 has the function of scraping material and each elastic scraper 440 is arranged between the corresponding scraper teeth 431 and the drive shaft 220, the scraping blind zone between each scraper tooth 431 and the drive shaft 220 is avoided, the effect of scraping away the accumulated material on the drive shaft 220 is improved, the pre-dispersion effect is further improved, and the waste of slurry is further reduced.

[0077] like Figure 7 As shown, the elastic scraper 440 is further described as a brush structure. Of course, in other embodiments, the elastic scraper 440 may also be a silicone component or other existing corrosion-resistant elastic structural components.

[0078] like Figure 5 As shown, in one embodiment, the pre-dispersion mechanism 400 further includes a discharge pipe 450, the inlet end of which is connected to the second end of the pre-dispersion cylinder 410, so that the discharge pipe 450 is connected to the outlet of the pre-dispersion channel 411. In this embodiment, the pre-dispersion slurry is guided out through the discharge pipe 450.

[0079] It is understandable that, due to the viscosity of the slurry, it will also adhere to the spiral pusher blade 320, resulting in a decrease in the pushing effect of the spiral pusher blade 320 and an increase in slurry waste.

[0080] To suppress the problem of material sticking to the spiral feeder blades 320, such as Figure 3 As shown, in one embodiment, the feed cylinder 310 has an air inlet 314, which is connected to the feed channel 311. The slurry premixing device 10a also includes an air blowing mechanism 500, the air outlet of which is connected to the air inlet 314. In this embodiment, after the feed channel 311 is emptied, air is blown into the air inlet 314 through the air outlet of the air blowing mechanism 500, causing the air blowing mechanism 500 to blow away the accumulated material on the spiral pusher blades 320, thus suppressing the problem of slurry adhering to the spiral pusher blades 320. It can be understood that even after the feed channel 311 is emptied, some slurry still adheres to the spiral pusher blades 320.

[0081] like Figure 3As shown, in one embodiment, the air blowing mechanism 500 includes a compressed air tank 510, an air supply pipe 520, and a switching valve 530. The air inlet end of the air supply pipe 520 is connected to the compressed air tank 510, and the air outlet end of the air supply pipe 520 is connected to the air inlet 314. The switching valve 530 is disposed on the air supply pipe 520. In this embodiment, after the feed channel 311 is emptied, the switching valve 530 is opened, allowing compressed air from the compressed air tank 510 to be delivered to the air inlet 314 through the air supply pipe 520. After the compressed air enters the air inlet 314, it flushes the spiral pusher blades 320, causing accumulated material to peel off the spiral pusher blades 320, thus suppressing the problem of material accumulation on the spiral pusher blades 320.

[0082] like Figure 3 As shown, in one embodiment, there are multiple air inlets 314, which are spaced apart along the extension direction of the drive shaft 220. There are also multiple air supply pipes 520, each corresponding to one of the air inlets 314. Furthermore, there are multiple switching valves 530, each corresponding to one of the air supply pipes 520. In this embodiment, the multiple air inlets 314 are spaced apart along the extension direction of the drive shaft 220. When a switching valve 530 is opened, compressed air is delivered to the multiple air inlets 314 through the multiple air supply pipes 520, causing multiple streams of compressed air to flush the spiral pusher blades 320, thus improving the effect of stripping material accumulated on the spiral pusher blades 320.

[0083] like Figure 8 and Figure 9 As shown, in one embodiment, the pre-dispersion mechanism 400 further includes a cooling component 460, which is sleeved on the pre-dispersion cylinder 410. The cooling component 460 has a cooling channel 4601 along its extending direction, and inlet holes 4602 and outlet holes 4603 are respectively provided at both ends of the cooling component 460. In this embodiment, the coolant enters through the inlet hole 4602 and exits through the outlet hole 4603, allowing the coolant to circulate within the cooling channel 4601. This coolant then cools the pre-dispersion cylinder 410 and the shearing component 420, preventing heat accumulation in the shearing component 420.

[0084] like Figure 9As shown, in one embodiment, the cooling assembly 460 includes a cooling jacket 461 and a spiral guide vane 462. The cooling jacket 461 has an installation cavity 4611, and the spiral guide vane 462 is located inside the installation cavity 4611. The inner and outer sides of the spiral guide vane 462 are connected to the inner wall of the installation cavity 4611, so that the spiral guide vane 462 and the inner wall of the installation cavity 4611 together form a spiral cooling channel 4601. The cooling jacket 461 is fitted onto the pre-dispersion cylinder 410, and the two ends of the cooling jacket 461 have an inlet hole 4602 and an outlet hole 4603, respectively. In this embodiment, the coolant enters from the inlet hole 4602 and then flows along the cooling channel 4601, so that the flow path of the coolant spirals around the pre-dispersion cylinder 410, and finally exits from the outlet hole 4603, so that the coolant circulates in the spiral cooling channel 4601. Because the coolant flows in a spiral shape, it spirals around the pre-dispersion cylinder 410, which extends the flow path of the coolant and improves its cooling effect.

[0085] like Figure 1 As shown, in one embodiment, the pulping system 10 further includes a storage assembly 600, which includes a first storage tank 610, a first feed valve 620, a first discharge valve 630, a second storage tank 640, a second feed valve 650, a second discharge valve 660, and a pulp pump 670. The inlet end of the first storage tank 610 is connected to the outlet end of the disperser 10b, and the outlet end of the first storage tank 610 is connected to the inlet end of the disperser 10b. The first feed valve 620 is equipped with... The first discharge valve 630 is located at the inlet end of the first storage tank 610, the second storage tank 640 is connected to the discharge end of the disperser 10b, the second storage tank 640 is connected to the inlet end of the disperser 10b, the second feed valve 650 is located at the inlet end of the second storage tank 640, the second discharge valve 660 is located at the discharge end of the second storage tank 640, and the slurry pump 670 is located at the inlet end of the disperser 10b.

[0086] like Figure 1As shown, in this embodiment, the pre-dispersed slurry is transported to the disperser 10b for dispersion. During dispersion in the disperser 10b, the first feed valve 620 and the first discharge valve 630 are opened, while the second feed valve 650 and the second discharge valve 660 are closed, allowing the slurry dispersed by the disperser 10b to be transported to the first storage tank 610. After the disperser 10b completes dispersion, the slurry from the first storage tank 610 is pumped into the disperser 10b by the slurry pump 670 for further dispersion. At this time, the first feed valve 620 and the first discharge valve 630 are closed, while the second feed valve 650 and the second discharge valve 660 are opened, allowing the disperser 10b to continue dispersing. The dispersed slurry is transported to the second storage tank 640. After the disperser 10b completes dispersion, the slurry pump 670 from the second storage tank 640 is pumped into the disperser 10b for further dispersion. At this time, the first feed valve 620 and the first discharge valve 630 are opened, and the second feed valve 650 and the second discharge valve 660 are closed, so that the slurry dispersed by the disperser 10b is transported to the first storage tank 610. This cycle is repeated, so that the slurry is alternately stored in the first storage tank 610 and the second storage tank 640, and the disperser 10b disperses the slurry multiple times, improving the dispersion effect of the slurry and making the slurry meet the preset requirements.

[0087] like Figure 1 As shown, in one embodiment, the dispersion of the disperser 10b is controlled by a dispersion control method, which includes: dispersing the slurry through the disperser 10b, opening the first feed valve 620 and the first discharge valve 630, and closing the second feed valve 650 and the second discharge valve 660, so that the slurry dispersed by the disperser 10b enters the first storage tank 610; pumping the slurry from the first storage tank 610 into the disperser 10b through the slurry pump 670; dispersing the slurry through the disperser 10b, closing the first feed valve 620 and the first discharge valve 630, and opening the second feed valve 650 and the second discharge valve 660, so that the slurry dispersed by the disperser 10b enters the second storage tank 640; pumping the second slurry from the second storage tank 640 into the disperser 10b through the slurry pump 670; and repeating the above steps in a cyclic manner so that the slurry is alternately stored in the first storage tank 610 and the second storage tank 640, and the disperser 10b disperses the slurry multiple times. In this embodiment, the pre-dispersed slurry is dispersed multiple times by the disperser 10b, and the first storage tank 610 and the second storage tank 640 are used to alternately store the slurry, which improves the dispersion effect of the slurry and makes the slurry meet the preset requirements.

[0088] Compared with the prior art, this disclosure has at least the following advantages:

[0089] The powder and solvent are first added into the feed channel 311 to mix them and obtain a slurry. Since the drive component 210 drives the spiral pusher blade 320 to rotate through the drive shaft 220, the spiral pusher blade 320 can push the slurry through the feed channel 311 and the pre-dispersion channel 411 and then discharge it. Since the drive component 210 also drives the shear component 420 to rotate through the drive shaft 220, when the slurry passes through the pre-dispersion channel 411, the shear component 420 will shear the slurry, so that the slurry is pre-dispersed. The pre-dispersed slurry is then transported to the disperser 10b for circulation dispersion. Since the shear component 420 has already refined the slurry during pre-dispersion, it avoids the problem of clogging the slurry at the disperser 10b and ensures the normal operation of the disperser 10b.

[0090] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A slurry premixing device, characterized in that, include: Base; A drive mechanism includes a drive assembly and a drive shaft, wherein the drive assembly is mounted on the base and the drive shaft is connected to the power output end of the drive assembly; A spiral feeding mechanism includes a feeding cylinder and spiral pusher blades. The feeding cylinder is mounted on the machine base and has a feeding channel. A powder inlet and a solvent inlet are both opened at the first end of the feeding cylinder and are connected to the first end of the feeding channel. A drive shaft passes through the feeding channel, and the spiral pusher blades are located inside the feeding channel and fixedly connected to the drive shaft. as well as The pre-dispersion mechanism includes a pre-dispersion cylinder, a shearing assembly, multiple scraping assemblies, and multiple elastic scraping elements. The first end of the pre-dispersion cylinder is connected to the second end of the feed cylinder. The pre-dispersion cylinder has a pre-dispersion channel, and the inlet end of the pre-dispersion channel is connected to the outlet end of the feed channel. The drive shaft also passes through the pre-dispersion channel, and the shearing assembly is located inside the pre-dispersion channel and fixedly connected to the drive shaft. The shearing assembly includes a plurality of dispersing members, which are spaced apart along the extension direction of the drive shaft, and each dispersing member is fixedly connected to the drive shaft; each dispersing member includes a plurality of dispersing teeth, which are spaced around the drive shaft circumferentially. Multiple scraping components are spaced apart, each scraping component is located in the pre-dispersion channel and fixedly connected to the pre-dispersion cylinder, and a scraping component is provided between two adjacent dispersing components. Each of the scraping components includes scraping teeth located within the pre-dispersion channel. A first end of the scraping tooth is fixedly connected to the pre-dispersion cylinder, and a second end of the scraping tooth is disposed adjacent to the root of the corresponding dispersion tooth. A gap exists between the second end of the scraping tooth and the drive shaft. The pre-dispersion channel includes a coarse dispersion zone and a fine dispersion zone that are interconnected. The coarse dispersion zone is connected to the discharge end of the feed channel. The plurality of dispersion components include a plurality of coarse dispersion components and a plurality of fine dispersion components. The plurality of coarse dispersion components are spaced apart along the extension direction of the drive shaft and are fixedly connected to the drive shaft. The plurality of fine dispersion components are spaced apart along the extension direction of the drive shaft and are fixedly connected to the drive shaft. The distance between any two adjacent coarse dispersion components is greater than the distance between any two adjacent fine dispersion components. Multiple elastic scraping elements are connected one-to-one to the second end of multiple scraping teeth, and the multiple elastic scraping elements also abut against the drive shaft, so that each elastic scraping element is disposed between the corresponding scraping tooth and the drive shaft.

2. The slurry premixing equipment according to claim 1, characterized in that, Each of the dispersion teeth has a plurality of spaced shearing edges on its surface.

3. The slurry premixing equipment according to claim 2, characterized in that, Each of the shearing edges has an angle with the extension direction of the drive shaft.

4. The slurry premixing equipment according to claim 1, characterized in that, Each of the scraping components includes one scraping tooth, and a plurality of the scraping teeth are spaced apart along the extension direction of the pre-dispersion channel.

5. The slurry premixing equipment according to claim 1, characterized in that, The pre-dispersion mechanism also includes a discharge pipe, the inlet end of which is connected to the outlet end of the pre-dispersion channel.

6. The slurry premixing equipment according to claim 1, characterized in that, The feed cylinder has an air inlet, which is connected to the feed channel. The slurry premixing equipment also includes an air blowing mechanism, the air outlet of which is connected to the air inlet.

7. The slurry premixing equipment according to claim 6, characterized in that, The air blowing mechanism includes a compressed air tank, an air supply pipe, and a switch valve. The air inlet end of the air supply pipe is connected to the compressed air tank, the air outlet end of the air supply pipe is connected to the air inlet, and the switch valve is disposed on the air supply pipe.

8. The slurry premixing equipment according to claim 7, characterized in that, The number of air inlets is multiple, and the multiple air inlets are spaced apart along the extension direction of the drive shaft. The number of air supply pipes is multiple, and the multiple air supply pipes are connected to the multiple air inlets in a one-to-one correspondence. The number of switching valves is multiple, and the multiple switching valves are correspondingly arranged on the multiple air supply pipes.

9. A pulping system, characterized in that, The slurry premixing equipment includes any one of claims 1 to 8, wherein the slurry preparation system further includes a disperser, the inlet of which is connected to the outlet of the predispersing channel.

10. The pulping system according to claim 9, characterized in that, The pulping system also includes a storage component, which comprises: The first storage tank has its inlet end connected to the outlet end of the disperser, and the outlet end of the first storage tank is connected to the inlet end of the disperser. The first feed valve is located at the feed inlet end of the first storage tank; The first discharge valve is located at the discharge end of the first storage tank; The second storage tank; the inlet of the second storage tank is connected to the outlet of the disperser, and the outlet of the second storage tank is connected to the inlet of the disperser. The second feed valve is located at the feed inlet of the second storage tank; A second discharge valve is installed at the discharge end of the second storage tank; and A slurry pump is installed at the feed end of the disperser.

11. The pulping system according to claim 10, characterized in that, The dispersion is controlled by a distributed control method, which includes: S100: The slurry is dispersed by the disperser, and the first feed valve and the first discharge valve are opened, while the second feed valve and the second discharge valve are closed, so that the slurry dispersed by the disperser enters the first storage tank. S300: The slurry from the first storage tank is pumped into the disperser by the slurry pump; S500: The slurry is dispersed by the disperser, and the first feed valve and the first discharge valve are closed, while the second feed valve and the second discharge valve are opened, so that the slurry dispersed by the disperser enters the second storage tank; S700: The slurry from the second storage tank is pumped into the disperser by the slurry pump; S900: Repeat S100 to S700 in a cyclical manner to allow the slurry to be stored alternately in the first storage tank and the second storage tank, and to allow the disperser to disperse the slurry multiple times.

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