Slurry circulating system

Abstract

The utility model provides a slurry circulating system which comprises a stirring tank, a buffer tank, a trough, a partition plate and a return tank, and the partition plate is fixed in the trough and divides the trough into a fresh material area and a material stacking area; wherein a discharge port of the stirring tank is communicated to the buffer tank, a discharge port of the buffer tank is communicated to the new material area, slurry in the new material area flows to the stacking area after overflowing, a discharge port of the stacking area is communicated to the return tank, and a discharge port of the return tank is communicated to the buffer tank after being connected with a filter device. According to the slurry circulating system disclosed by the utility model, the drop roller can be designed in the new material area, and the gravure roller is designed in the stacking area, so that old slurry scraped by a scraper is prevented from being mixed with new slurry, the slurry in the new material area is ensured to be uniformly distributed, the flow direction is clear, scratches and bubbles are avoided, and the uniformity and quality of slurry coating are further ensured; and the quality of the old slurry flowing from the return tank to the buffer tank can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slurry circulation, in particular to a slurry circulation system for processing carbon-coated aluminum foil. Background Art

[0002] Carbon-coated aluminum foil is a new type of composite positive electrode current collector, which is now widely used in lithium batteries of lithium iron phosphate system. It mainly coats a layer of functional slurry on the aluminum foil to improve the contact between the positive electrode material and the current collector while greatly reducing the contact resistance between the positive electrode material and the current collector. Therefore, the coating process of carbon-coated aluminum foil is an extremely critical process in its production process.

[0003] The coating process is carried out by gravure printing, and the gravure printing device mainly includes a feeding structure, a material trough structure and a waste recovery structure. Of course, in order to avoid waste of slurry, the feeding structure, the material trough structure and the waste recovery structure can also be interconnected to allow the slurry to be recycled.

[0004] In related technologies, such as Figure 2 As shown, the material trough is a separate trough structure, and its feed port and return port are both located on the same side of the material trough. Therefore, during coating, the slurry in the material trough often accumulates under the scraper, which causes the slurry on the scraper side of the material trough to easily dry and accumulate, resulting in uneven slurry distribution, unclear flow direction, scratches and bubbles, etc., which ultimately affect the uniformity and quality of slurry coating. Utility Model Content

[0005] In view of the deficiencies of the above related technologies, the utility model proposes a slurry circulation system to solve the problem that the material tank design in the slurry coating device in the related technology will affect the uniformity and quality of the slurry coating.

[0006] The utility model provides a slurry circulation system, which comprises a stirring tank, a buffer tank separated from the stirring tank, a material trough, a partition and a reflux tank separated from the buffer tank, the material trough is arranged above the reflux tank and separated from the reflux tank, the partition is fixed in the material trough and divides the material trough into a new material area and a stockpiling area; wherein, the discharge port of the stirring tank is connected to the buffer tank, the discharge port of the buffer tank is connected to the new material area, the upper end surface of the new material area is higher than the upper end surface of the stockpiling area, the slurry in the new material area overflows and flows to the stockpiling area, the discharge port of the stockpiling area is connected to the reflux tank, and the discharge port of the reflux tank is connected to the buffer tank after being connected to a filtering device.

[0007] Preferably, the corners of the material trough are chamfered or rounded.

[0008] Preferably, the two opposite sides of the partition are in an inclined structure; the cross section of the partition gradually increases from one end away from the bottom of the trough to the other end to form an inclined structure.

[0009] Preferably, the partition is fixed to the middle area of ​​the trough.

[0010] Preferably, the bottom of the material stacking area is an inclined surface, and the discharge port of the material stacking area is located at the lowest area of ​​the bottom thereof.

[0011] Preferably, the discharge port of the mixing tank is connected to the buffer tank through a first pipe, the discharge port of the buffer tank is connected to the new material area through a second pipe, and the discharge port of the stacking area is connected to the reflux tank through a third pipe.

[0012] Preferably, the stirring tank is arranged higher than the buffer tank so that the slurry in the stirring tank flows into the buffer tank by gravity.

[0013] Preferably, the two pipelines are provided with a first water pump.

[0014] Preferably, the feed inlet of the filtering device is connected to the discharge port of the reflux tank through a fourth pipe, and the discharge port of the filtering device is connected to the cache tank through a fifth pipe.

[0015] Preferably, the fourth pipeline is provided with a second water pump.

[0016] Compared with the related art, the slurry circulation system in the utility model divides the material trough into a new material area and a stockpiling area through a partition, and also connects the discharge port of the buffer tank to the new material area, and the discharge port of the stockpiling area to the reflux tank. In this way, the ink transfer roller can be designed in the new material area, and the gravure roller can be designed in the stockpiling area, so as to avoid the mixing of the old slurry scraped off by the scraper with the new slurry, so as to ensure that the slurry in the new material area is evenly distributed, the flow direction is clear, and there will be no scratches and bubbles, thereby ensuring the uniformity and quality of the slurry coating, and the old slurry can also be filtered by a filtering device to remove impurities and particles in the old slurry, thereby improving the quality of the old slurry flowing from the reflux tank to the buffer tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 A schematic diagram of the structure of a slurry circulation system provided in an embodiment of the utility model;

[0019] Figure 2 A structural schematic diagram of a material trough provided for related technology.

[0020] Among them, 100, slurry circulation system; 1, stirring tank; 11, first pipeline; 2, buffer tank; 21, second pipeline; 3, material trough; 31, new material area; 32, stacking area; 321, third pipeline; 4, partition; 5, reflux tank; 6, filtering device; 61, fourth pipeline; 62, fifth pipeline; 7, ink transfer roller; 8, gravure roller; 9, scraper. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] It should be noted that the expressions such as "upper", "lower", "left", and "right" mentioned in the embodiments of the present invention are described with reference to the placement states in the accompanying drawings and should not be interpreted as limiting embodiments of the present invention. In addition, it should be understood that in the text, when referring to an element constituting "above" or "below" another element, it is possible that the element directly constitutes "above" or "below" another element, or it is possible that the element constitutes "above" or "below" another element through an intermediate element.

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] The utility model embodiment provides a slurry circulation system 100, combined with Figure 1 As shown, it includes a stirring tank 1, a buffer tank 2 separated from the stirring tank 1, a material trough 3, a partition 4 and a reflux tank 5 separated from the buffer tank 2. The material trough 3 is arranged above the reflux tank 5 and separated from the reflux tank 5. The partition 4 is fixed in the material trough 3 and divides the material trough 3 into a new material area 31 and a stacking area 32.

[0026] Among them, the stirring tank 1 is also called a slurry stirring tank, and the reflux tank 5 is also called a pile area reflux tank.

[0027] The discharge port of the mixing tank 1 is connected to the buffer tank 2, and the discharge port of the buffer tank 2 is connected to the new material area 31. The upper end surface of the new material area 31 is higher than the upper end surface of the stockpiling area 32. The slurry in the new material area 31 overflows and flows to the stockpiling area 32. The discharge port of the stockpiling area 32 is connected to the reflux tank 5, and the discharge port of the reflux tank 5 is connected to the buffer tank 2. This design allows the slurry to circulate to avoid waste of slurry, and the feed port of the material trough 3 is designed in the new material area 31, and the discharge port of the material trough 3 is designed in the stockpiling area 32. This layout can also make the slurry flow more smoothly in the material trough 3, that is, improve the fluidity of the slurry in the material trough 3, make the flow direction of the slurry clear, and avoid the problems caused by slurry accumulation and dry accumulation.

[0028] The discharge port of the mixing tank 1 is connected to the buffer tank 2 through the first pipe 11, the discharge port of the buffer tank 2 is connected to the new material area 31 through the second pipe 21, and the discharge port of the stacking area 32 is connected to the reflux tank 5 through the third pipe 321. This design can facilitate the transportation of slurry.

[0029] The second pipeline 21 is provided with a first water pump. This design can more conveniently transport the slurry from the buffer tank 2 to the new material area 31.

[0030] The stirring tank 1 is arranged higher than the buffer tank 2 so that the slurry in the stirring tank 1 flows into the buffer tank 2 by gravity.

[0031] The corners of the material tank 3 are chamfered or rounded. This design can prevent the slurry from accumulating in the dead corners, improve the fluidity of the slurry in the material tank 3, reduce the waste caused by the slurry accumulation, and facilitate cleaning.

[0032] The two opposite sides of the partition 4 are inclined structures; the partition 4 gradually increases its cross section from one end away from the bottom of the trough 3 to the other end to form an inclined structure. This design can also prevent the slurry from accumulating in dead corners, improve the fluidity of the slurry in the trough 3, reduce the waste caused by slurry accumulation, and facilitate cleaning.

[0033] The partition plate 4 is fixed to the middle area of ​​the trough 3. This design can facilitate the storage of new slurry and old slurry.

[0034] The bottom of the stockpiling area 32 is an inclined surface, and the discharge port of the stockpiling area 32 is located at the lowest area of ​​the bottom thereof. This design allows the old slurry to flow more smoothly to the discharge port, thereby avoiding the accumulation of the old slurry.

[0035] In addition, the slurry circulation system 100 further includes a filter device 6, the inlet of the filter device 6 is connected to the outlet of the reflux tank 5, and the outlet of the filter device 6 is connected to the buffer tank 2. This design can filter the old slurry recovered into the reflux tank 5 to remove impurities and particles in the old slurry, thereby improving the quality of the old slurry flowing from the reflux tank 5 to the buffer tank 2.

[0036] The inlet of the filter device 6 is connected to the outlet of the reflux tank 5 through the fourth pipe 61, and the outlet of the filter device 6 is connected to the buffer tank 2 through the fifth pipe 62. This design can facilitate the transportation of slurry.

[0037] The fourth pipeline 61 is provided with a second water pump. This design can more conveniently transport the slurry from the reflux tank 5 to the filtering device 6.

[0038] Compared with the related art, the slurry circulation system 100 in the utility model divides the material trough 3 into a new material area 31 and a stockpiling area 32 through a partition 4, and also connects the discharge port of the buffer tank 2 to the new material area 31, and the discharge port of the stockpiling area 32 to the reflux tank 5, so that the ink delivery roller 7 can be designed in the new material area 31, and the gravure roller 8 can be designed in the stockpiling area 32, so as to avoid the mixing of the old slurry scraped off by the scraper 9 with the new slurry, so as to ensure that the slurry in the new material area 31 is evenly distributed, the flow direction is clear, and there will be no scratches and bubbles, thereby ensuring the uniformity and quality of the slurry coating.

[0039] It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than to limit the scope of the present invention. Those skilled in the art should understand that any modification or equivalent replacement of the present invention without departing from the spirit and scope of the present invention should be included in the scope of the present invention. In addition, unless otherwise indicated by the context, words appearing in the singular include the plural form, and vice versa. In addition, unless otherwise specified, all or part of any embodiment may be used in combination with all or part of any other embodiment.

Claims

1. A slurry circulation system, characterized in that: The slurry circulation system includes a stirring tank, a buffer tank separated from the stirring tank, a material trough, a partition and a reflux tank separated from the buffer tank, the material trough is arranged above the reflux tank and separated from the reflux tank, the partition is fixed in the material trough and divides the material trough into a new material area and a stacking area; wherein, the discharge port of the stirring tank is connected to the buffer tank, the discharge port of the buffer tank is connected to the new material area, the upper end surface of the new material area is higher than the upper end surface of the stacking area, the slurry in the new material area overflows and flows to the stacking area, the discharge port of the stacking area is connected to the reflux tank, and the discharge port of the reflux tank is connected to the buffer tank after being connected to the filtering device.

2. The slurry circulation system according to claim 1, characterized in that: The corners of the material trough are chamfered or rounded.

3. The slurry circulation system according to claim 2, characterized in that: The two opposite sides of the partition are in an inclined structure; the cross section of the partition gradually increases from one end away from the bottom of the trough to the other end to form an inclined structure.

4. The slurry circulation system according to claim 1, characterized in that: The partition is fixed to the middle area of ​​the trough.

5. The slurry circulation system according to claim 1, characterized in that: The bottom of the material stacking area is an inclined surface, and the material discharge port of the material stacking area is located at the lowest area of ​​the bottom.

6. The slurry circulation system according to claim 1, characterized in that: The discharge port of the mixing tank is connected to the buffer tank through a first pipe, the discharge port of the buffer tank is connected to the new material area through a second pipe, and the discharge port of the stacking area is connected to the reflux tank through a third pipe.

7. The slurry circulation system according to claim 6, characterized in that: The stirring tank is arranged higher than the buffer tank so that the slurry in the stirring tank flows into the buffer tank by gravity.

8. The slurry circulation system according to claim 6, characterized in that: The two pipelines are provided with a first water pump.

9. The slurry circulation system according to claim 8, characterized in that: The inlet of the filtering device is connected to the outlet of the reflux tank through a fourth pipe, and the outlet of the filtering device is connected to the cache tank through a fifth pipe.

10. The slurry circulation system according to claim 9, characterized in that: The fourth pipeline is provided with a second water pump.

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