A device for eliminating air bubbles suspended in a slurry

Abstract

This invention relates to the field of slurry debubbling technology, and proposes a device for eliminating suspended air bubbles in slurry. The device includes a housing with a cavity having an inlet, an outlet, and a vacuum port; a vacuum pump connected to the vacuum port; a liquid inlet pipe extending from the bottom of the housing into the cavity; the liquid inlet pipe having an inlet and an outlet; the outlet facing upwards and communicating with the cavity; and a distribution plate disposed on the liquid inlet pipe and surrounding the outlet. This technical solution solves the problems of incomplete bubble elimination, inability to continuously discharge slurry, and the limitation to batch debubbling of slurry in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of slurry degassing technology, specifically to a device for eliminating suspended air bubbles in slurry. Background Technology

[0002] The lithium-ion battery separator is one of the key internal components of a lithium-ion battery. Commercially available separator materials are mainly polyolefin separators, primarily made of polyethylene and polypropylene. The separator is a crucial internal component. Located between the positive and negative electrodes, its main function is to separate the active materials of the two electrodes, preventing short circuits due to contact, while allowing the rapid transport of charged ions. To improve the separator's heat resistance, a slurry is coated onto it. This slurry enhances the separator's heat resistance and helps protect the positive and negative electrodes of the lithium-ion battery. However, due to the manufacturing process, the slurry contains numerous microbubbles. During the coating process, these microbubbles are transferred to the separator. When the separator ruptures during drying, this results in incomplete coating and affects separator quality. Current technologies do not completely eliminate these bubbles, especially since continuous production is not possible; bubble removal can only be done in batches of the slurry. Summary of the Invention

[0003] This invention proposes a device for eliminating suspended air bubbles in slurry, which solves the technical problems of incomplete bubble elimination, inability to continuously discharge slurry, and the inability to eliminate air bubbles in batches in related technologies.

[0004] The technical solution of the present invention is as follows:

[0005] A device for eliminating suspended air bubbles in slurry, comprising:

[0006] The housing has a cavity having an inlet, an outlet, and a vacuum port.

[0007] A vacuum pump, which is connected to the vacuum port,

[0008] A liquid inlet pipe extends from the bottom of the housing into the cavity. The liquid inlet pipe has an inlet and an outlet, with the outlet facing upwards and communicating with the cavity.

[0009] A distribution plate is disposed on the inlet pipe and located around the outlet.

[0010] As a further technical solution, it also includes

[0011] A buffer bubble-eliminating plate is disposed on the inner wall of the cavity. The buffer bubble-eliminating plate has a through hole through which the liquid inlet pipe passes. The diameter of the through hole is smaller than the outer diameter of the distribution plate and larger than the diameter of the liquid inlet pipe. The buffer bubble-eliminating plate is located on the lower side of the distribution plate.

[0012] As a further technical solution, it also includes

[0013] A floating feed plate is slidably mounted on the liquid inlet pipe. The floating feed plate is arched upwards and has a floating cavity inside.

[0014] An annular baffle is disposed around the floating feed plate.

[0015] A weir plate is disposed on the annular baffle.

[0016] As a further technical solution, the distribution disk is arched upwards, and the liquid outlet is located at the highest point of the center of the distribution disk.

[0017] As a further technical solution, it also includes

[0018] The inlet pump is connected to the inlet port.

[0019] A vacuum gauge is disposed on the outer surface of the housing and communicates with the cavity.

[0020] An observation hole is provided at the top of the cavity.

[0021] As a further technical solution, the inlet pipe also has a plurality of sequentially arranged tangential grooves, and the inlet pipe also has a return port, and further includes...

[0022] A sealing shell is disposed outside the inlet pipe and below the distribution plate, forming a sealing cavity between the sealing shell and the inlet pipe. A tangential groove connects the interior of the inlet pipe to the sealing cavity, and a return port connects the interior of the inlet pipe to the sealing cavity. The tangential groove is located above the return port.

[0023] A tangent, wherein the reciprocating motion of the tangent is disposed in the tangent groove.

[0024] As a further technical solution, it also includes

[0025] A one-way valve is provided at the reflux port.

[0026] As a further technical solution, the tangent line includes a first tangent group and a second tangent group, and also includes a first slider and a second slider, wherein the first tangent group and the second tangent group are respectively disposed on the first slider and the second slider.

[0027] It also includes a linear drive assembly disposed within the sealed cavity, the linear drive assembly being used to drive the first slider and the second slider to slide.

[0028] As a further technical solution, the linear drive component includes

[0029] A reciprocating roller, having a reciprocating groove, is rotatably disposed within the sealed cavity. Both the first and second sliding members have guide portions, which are slidably disposed within the reciprocating groove.

[0030] A drive motor drives the reciprocating roller to rotate.

[0031] As a further technical solution, the tangential groove is inclined relative to the liquid inlet pipe.

[0032] The working principle and beneficial effects of this invention are as follows:

[0033] This invention proposes a device for eliminating suspended air bubbles in slurry. A shell is designed to contain the slurry for bubble elimination, and a vacuum pump is designed to extract air from the cavity formed by the shell. When the cavity is under vacuum, the slurry flows out through the inlet pipe onto a distribution plate. As the slurry reaches the distribution plate, it forms a slurry layer. Because the slurry layer on the distribution plate is not too thick, it ensures that the air bubbles within the slurry layer can burst under the vacuum environment. If the air bubbles cannot burst on the distribution plate, the slurry... As the slurry drips from the distribution plate to the bottom of the cavity, the bubble walls gradually thin and burst. Compared to existing vacuum slurry elimination devices that fill the slurry tank with the top inlet before eliminating bubbles, this method of gradually feeding slurry into the cavity through the feed pipe achieves continuous feeding and discharging, ensuring the continuity of the production rhythm. Eliminating bubbles by distributing the slurry evenly with the distribution plate is more effective than directly eliminating bubbles from a large amount of slurry, resulting in more thorough gas treatment of the slurry. Attached Figure Description

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the assembly structure of the sealing shell and the evenly distributed disk of the present invention;

[0037] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle CC section;

[0038] In the diagram: Shell-1, Cavity-101, Inlet-102, Outlet-103, Vacuum Port-104, Vacuum Pump-2, Liquid Inlet Pipe-3, Liquid Inlet-301, Liquid Outlet-302, Distribution Plate-4, Buffer and Bubble Elimination Plate-5, Through Hole-501, Floating Feed Plate-6, Floating Cavity-601, Annular Baffle-7, Weir Plate-8, Liquid Inlet Pump-9, Vacuum Gauge-10, Observation Hole-11, Tangent-13 Groove-303, reflux port-304, sealing shell-12, sealing cavity-1201, tangent-13, one-way valve-14, tangent-13, first tangent group-1301, second tangent group-1302, first sliding member-1303, second sliding member-1304, linear drive assembly-1305, reciprocating roller-1306, drive motor-1307, guide part-1308, reciprocating groove-1309. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1-3 As shown, this embodiment proposes...

[0041] A device for eliminating suspended air bubbles in slurry includes a housing 1 with a cavity 101. The cavity 101 has an inlet 102, an outlet 103, and a vacuum port 104. A vacuum pump 2 is connected to the vacuum port 104. An inlet pipe 3 extends from the bottom of the housing 1 into the cavity 101. The inlet pipe 3 has an inlet 301 and an outlet 302. The outlet 302 is arranged facing upwards and communicates with the cavity 101. A distribution plate 4 is arranged on the inlet pipe 3 and is located around the outlet 302.

[0042] This embodiment proposes a device for eliminating suspended air bubbles in slurry. A housing 1 is designed to contain the slurry for bubble elimination, and a vacuum pump 2 is designed to extract air from the cavity 101 formed by the housing 1. When the cavity 101 is under vacuum, the slurry flows out from the inlet pipe 3 onto the equalization plate 4. When the slurry flows onto the equalization plate 4, a slurry layer is formed on it. Because the slurry layer on the equalization plate 4 is not too thick, it ensures that the air bubbles within the slurry layer can burst under the vacuum environment. If the air bubbles cannot burst on the equalization plate 4... As the slurry drips from the equalization plate 4 to the bottom of the cavity 101, the bubble walls gradually thin and burst. Compared with the existing vacuum slurry elimination device that fills the slurry into the bubble elimination tank through the top feed port and then performs bubble elimination treatment, the method of gradually feeding the slurry into the cavity 101 through the feed pipe can achieve continuous feeding and discharging, ensuring the continuity of the production rhythm. The bubble elimination effect is better than the direct bubble elimination of a large amount of slurry after the slurry is evenly distributed by the equalization plate 4, and the gas treatment of the slurry is more thorough.

[0043] Furthermore, it also includes a buffer bubble-eliminating plate 5, which is disposed on the inner wall of the cavity 101. The buffer bubble-eliminating plate 5 has a through hole 501 through which the liquid inlet pipe 3 passes. The diameter of the through hole 501 is smaller than the outer diameter of the distribution plate 4 and larger than the diameter of the liquid inlet pipe 3. The buffer bubble-eliminating plate 5 is located on the lower side of the distribution plate 4.

[0044] In this embodiment, a buffer bubble-eliminating plate 5 is designed to eliminate bubbles that are not completely eliminated in the slurry flowing down from the equalization disk 4. The impact force of the slurry flowing down from the equalization disk 4 can break the bubbles that have expanded in the vacuum environment. If the impact force cannot break the bubbles, the bubbles will deform as they slide down the edge of the buffer bubble-eliminating plate 5, and the slurry film of the bubbles will become thinner, making the bubbles easier to burst by the gas and making the gas in the slurry more uniformly processed.

[0045] Furthermore, it also includes a floating feed plate 6, which is slidably mounted on the liquid inlet pipe 3. The floating feed plate 6 is arched and has a floating cavity 601 inside. An annular baffle 7 is mounted around the floating feed plate 6, and a weir plate 8 is mounted on the annular baffle 7.

[0046] In this embodiment, a floating feed plate 6 is designed for the final step of bubble breaking. When the slurry on the buffer bubble-eliminating plate 5 falls onto the floating feed plate 6, the bubbles further enlarged by the buffer bubble-eliminating plate 5 will break under the impact force. If the bubbles in the slurry are not broken when they fall onto the floating feed plate 6, they will be blocked by the weir plate 8 on the floating baffle. The weir plate 8 is triangular, and the bubbles will be punctured by the sharp point when they come into contact with the weir plate 8. In order to ensure that the weir plate 8 can puncture the bubbles, an annular baffle 7 is also designed. The annular baffle 7 blocks the slurry, and the bubbles follow the flow of the slurry. The slurry rises to the weir plate 8, and the bubble-free slurry flows out through the gaps in the weir plate 8. The air bubbles are blocked inside the weir plate 8 until they are broken. When the slurry in the cavity 101 reaches a certain height, the floating baffle rises under the action of the floating cavity 601 and opens the outlet 103. When the device for eliminating suspended air bubbles in the slurry stops working, the floating baffle descends and blocks the outlet 103. This structure ensures the complete elimination of air bubbles in the slurry and also ensures the vacuum level in the cavity 101 before and after the device for eliminating suspended air bubbles in the slurry is started and stopped, which facilitates quick start and stop of the equipment and reduces energy consumption.

[0047] Furthermore, the equalization disk 4 is arched upwards, and the outlet 302 is located at the highest point of the center of the equalization disk 4. In this embodiment, considering that the slurry needs to flow down from the equalization disk 4, the equalization disk 4 is set to be arched upwards, and the outlet 302 is set at the highest point of the center of the equalization disk 4 to facilitate the flow of the slurry.

[0048] Furthermore, it also includes a liquid inlet pump 9, which is connected to the liquid inlet 301. A vacuum gauge 10 is installed on the outer surface of the housing 1 and is connected to the cavity 101. An observation hole 11 is installed on the top of the cavity 101.

[0049] In this embodiment, a liquid inlet pump 9 is designed to pump the slurry into the cavity 101, a vacuum gauge 10 is designed to observe the vacuum level inside the cavity 101, and an observation hole 11 is designed to observe the material state inside the cavity 101. The design of the liquid inlet pump 9, the vacuum gauge 10, and the observation hole 11 makes the device for eliminating suspended air bubbles in the slurry easier to maintain.

[0050] Furthermore, the inlet pipe 3 also has a plurality of sequentially arranged tangent 13 slots 303, the inlet pipe 3 also has a return port 304, and also includes a sealing shell 12. The sealing shell 12 is disposed outside the inlet pipe 3 and located below the uniform distribution plate. A sealing cavity 1201 is formed between the sealing shell 12 and the inlet pipe 3. The tangent 13 slots 303 connect the inside of the inlet pipe 3 with the sealing cavity 1201. The return port 304 connects the inside of the inlet pipe 3 with the sealing cavity 1201. The tangent 13 slots 303 are located above the return port 304. The tangent 13 reciprocates in the tangent 13 slots 303.

[0051] In this embodiment, the inlet pipe 3 is also designed with a tangent 13 groove 303 and a return port 304. The tangent 13 groove 303 is used to cut the air bubbles in the slurry in the inlet pipe 3. After the air bubbles are cut, they become smaller and more dispersed, and the subsequent defoaming treatment will be more thorough. In order to prevent the slurry from flowing into the cavity 101 from the tangent 13 groove 303, a sealing shell 12 is also designed. After the slurry flows out from the tangent 13 groove 303, it falls into the sealing cavity 1201. The slurry in the sealing cavity 1201 flows into the inlet pipe 3 through the return port 304.

[0052] Furthermore, it also includes a one-way valve 14, which is located at the return port 304. In this embodiment, to prevent slurry from flowing into the sealing cavity 1201 from the return port 304, a one-way valve 14 is also designed at the return port 304.

[0053] Furthermore, the tangent 13 includes a first tangent group 1301 and a second tangent group 1302, as well as a first sliding member 1303 and a second sliding member 1304. The first tangent group 1301 and the second tangent group 1302 are respectively disposed on the first sliding member 1303 and the second sliding member 1304. It also includes a linear drive assembly 1305, which is disposed within the sealed cavity 1201 and is used to drive the first sliding member 1303 and the second sliding member 1304 to slide 1304. In this embodiment, a linear drive assembly is used to drive the first sliding member 1303 and the second sliding member 1304 to drive the first tangent group 1301 and the second tangent group 1302 to perform cutting motion. This structure is simple and has a low failure rate.

[0054] Furthermore, the linear drive assembly 1305 includes a reciprocating roller 1306, which has a reciprocating groove 1309 and is rotatably disposed in the sealed cavity 1201. The first sliding member 1303 and the second sliding member 1304 both have guide portions 1308, which are slidably disposed in the reciprocating groove 1309. The drive motor 1307 drives the reciprocating roller 1306 to rotate.

[0055] In this embodiment, a reciprocating roller 1306 is designed to drive the first sliding member 1303 and the second sliding member 1304 to reciprocate. The guide portion 1308 of the first sliding member 1303 and the second sliding member 1304 is located in the reciprocating groove 1309 and moves along the reciprocating groove 1309. This structure is simple and has a low failure rate.

[0056] Furthermore, the groove 303 of the tangent 13 is inclined relative to the liquid inlet pipe 3. In this embodiment, in order to ensure a larger cutting area of ​​the tangent 13, the groove 303 of the tangent 13 is inclined relative to the liquid inlet pipe 3, which can ensure a better bubble elimination effect of the slurry.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for eliminating gas bubbles suspended in a slurry, comprising: A device for eliminating suspended air bubbles in slurry, comprising a housing (1) having a cavity (101) with an inlet (102), an outlet (103) and a vacuum port (104), a vacuum pump (2) connected to the vacuum port (104), a liquid inlet pipe (3) penetrating into the cavity (101) from the bottom of the housing (1), the liquid inlet pipe (3) having a liquid inlet (301) and a liquid outlet (302) arranged upwardly and in communication with the cavity (101), a uniform distribution disc (4) arranged on the liquid inlet pipe (3) and around the liquid outlet (302), a buffer air bubble elimination plate (5) arranged on the inner wall of the cavity (101), the buffer air bubble elimination plate (5) having a through hole (501) through which the liquid inlet pipe (3) penetrates, the through hole (501) having a diameter smaller than the outer diameter of the uniform distribution disc (4) and larger than the diameter of the liquid inlet pipe (3), the buffer air bubble elimination plate (5) being arranged below the uniform distribution disc (4), a floating discharge plate (6) arranged on the liquid inlet pipe (3) and sliding up and down, the floating discharge plate (6) being arched upwardly and having a floating cavity (601) in the interior, an annular baffle (7) arranged around the floating discharge plate (6), a weir plate (8) arranged on the annular baffle (7).

2. A device for eliminating gas bubbles suspended in slurry according to claim 1, characterized in that, The uniform distribution disc (4) is arched upwardly, and the liquid outlet (302) is arranged at the highest position in the center of the uniform distribution disc (4).

3. The device for eliminating gas bubbles suspended in slurry according to any one of claims 1-2, characterized in that, Further comprising a liquid inlet pump (9) in communication with the liquid inlet (301), a vacuum gauge (10) arranged on the outer surface of the housing (1) and in communication with the cavity (101), an observation hole (11) arranged on the top of the cavity (101).

4. The device for eliminating gas bubbles suspended in slurry according to claim 1, wherein The liquid inlet pipe (3) further has a plurality of tangent line (13) notches (303) arranged in sequence, and further has a backflow port (304), and further comprising a sealing shell (12) arranged outside the liquid inlet pipe (3) and below the uniform distribution disc (4), a sealing cavity (1201) being formed between the sealing shell (12) and the liquid inlet pipe (3), the tangent line (13) notches (303) being in communication with the interior of the liquid inlet pipe (3) and the sealing cavity (1201), the backflow port (304) being in communication with the interior of the liquid inlet pipe (3) and the sealing cavity (1201), the tangent line (13) notches (303) being arranged above the backflow port (304), a tangent line (13) reciprocally arranged in the tangent line (13) notches (303).

5. A device for eliminating gas bubbles suspended in slurry according to claim 4, characterized in that, Further comprising a one-way valve (14) arranged at the backflow port (304).

6. A device for eliminating gas bubbles suspended in slurry according to claim 4, characterized in that, The tangent line (13) comprises a first tangent line group (1301) and a second tangent line group (1302), and further comprises a first sliding piece (1303) and a second sliding piece (1304), the first tangent line group (1301) and the second tangent line group (1302) are arranged on the first sliding piece (1303) and the second sliding piece (1304) respectively, Further comprising a linear drive assembly (1305), the linear drive assembly (1305) is arranged in the sealed cavity (1201), and the linear drive assembly (1305) is used for driving the first sliding piece (1303) and the second sliding piece (1304) to slide.

7. A device for eliminating gas bubbles suspended in slurry according to claim 6, characterized in that, The linear drive assembly (1305) comprises A reciprocating roller (1306) having a reciprocating groove (1309) is rotationally arranged in the sealed cavity (1201), the first sliding piece (1303) and the second sliding piece (1304) each have a guide portion (1308) which is slidingly arranged in the reciprocating groove (1309), A drive motor (1307) drives the reciprocating roller (1306) to rotate.

8. The device for eliminating gas bubbles suspended in slurry according to claim 6, wherein The notch (303) of the tangent line (13) is arranged obliquely relative to the liquid inlet pipe (3).

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