Deacidification device for fluorine-containing lithium battery electrolyte additive

Abstract

The utility model belongs to the technical field of lithium ion battery electrolyte, particularly relates to a deacidification device for a fluorine-containing lithium battery electrolyte additive, and aims to solve the problems that the existing deacidification device is limited in deacidification effect and cannot recycle waste water generated by steam, so that water resources are wasted, and the following scheme is provided: the deacidification device comprises an adsorption tower; the first gate is fixedly connected to the adsorption tower; the steam device is arranged on one side of the adsorption tower; the filtering device is arranged on the steam device; the deacidification device is arranged on the adsorption tower; the nitrogen device is arranged on the adsorption tower; the hydrofluoric acid receiving tank device is arranged on one side of the adsorption tower; the alkali washing receiving tank device is arranged on one side of the hydrofluoric acid receiving tank device; according to the deacidification device, the deacidification effect can be improved, and wastewater can be recycled, so that the repeated utilization rate of water resources is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of lithium ion battery electrolyte, in particular to a deacidification device for fluorine-containing lithium battery electrolyte additives. BACKGROUND

[0002] The electrolyte functional additive can significantly improve the performance of the SEI film, improve the high and low temperature performance of the electrolyte, improve the electrolyte conductivity, improve the battery safety and the cycle stability of the battery, and the deacidification device is required to remove hydrogen fluoride in the electrolyte functional additive, so as to ensure the stability of the electrolyte functional additive.

[0003] The patent file with the publication number CN217016016U discloses a deacidification device for fluorine-containing lithium battery electrolyte additives, which comprises an adsorption tower, a hydrogen fluoride absorption tower, an alkali washing tower and an air blower.

[0004] The adsorption tower is connected with a crude product pipeline through a first switch valve, and is connected with a finished product receiving tank through a fourth switch valve.

[0005] However, the deacidification effect of the deacidification device in the above patent is limited, and the waste water generated by the steam cannot be recycled, thereby causing the problem of water resource waste. Invention content

[0006] In order to improve the problem that the deacidification effect of the existing deacidification device is limited and the waste water generated by the steam cannot be recycled, thereby causing the problem of water resource waste, the application provides a deacidification device for fluorine-containing lithium battery electrolyte additives.

[0007] The deacidification device for fluorine-containing lithium battery electrolyte additives provided by the application adopts the following technical scheme:

[0008] A deacidification device for fluorine-containing lithium battery electrolyte additives comprises:

[0009] An adsorption tower;

[0010] A first gate is fixedly connected to the adsorption tower;

[0011] A steam device is arranged on one side of the adsorption tower;

[0012] A filtering device is arranged on the steam device;

[0013] A deacidification device is arranged on the adsorption tower;

[0014] A nitrogen device is arranged on the adsorption tower;

[0015] A hydrofluoric acid receiving tank device is arranged on one side of the adsorption tower;

[0016] An alkali washing receiving tank device is arranged on one side of the hydrofluoric acid receiving tank device.

[0017] Further, the steam device comprises a steam tank, a steam pipe and a collecting pipe, the adsorption tower is fixedly connected with a first air pump, the steam pipe is fixedly connected with the steam tank and the first air pump respectively, and the adsorption tower is fixedly connected with a heating cavity.

[0018] Further, the filtering device comprises a filtering tank, a fixed frame, a rotating shaft and a plurality of stirring paddles, the filtering tank is installed at the bottom of the heating cavity, the fixed frame is fixedly connected with the filtering tank, the rotating shaft is rotatably connected with the fixed frame, the plurality of stirring paddles are fixedly connected with the rotating shaft, the two ends of the collecting pipe are fixedly connected with the steam tank and the filtering tank respectively, the bottom of the filtering tank is fixedly connected with a motor, the output shaft of the motor is fixedly connected with the rotating shaft, a hopper is installed on the filtering tank, an opening is formed in the hopper, a filtering cavity is fixedly connected with the hopper, and the filtering cavity is fixedly connected with the fixed frame. The filtering device is used for filtering and collecting water in the heating cavity.

[0019] Further, the deacidification device comprises a weakly basic anion exchange resin, a strongly basic anion exchange resin and a filtering clamp plate, the weakly basic anion exchange resin is fixedly connected with the filtering tank, the weakly basic anion exchange resin is fixedly connected with the strongly basic anion exchange resin, and the filtering clamp plate is fixedly connected with the adsorption tower. The filtering clamp plate is embedded with a filler.

[0020] Further, the nitrogen device comprises a nitrogen tank and a tee pipe, the tee pipe is fixedly connected with the adsorption tower, a second gate and a second air pump are installed on the tee pipe, the second air pump is installed on the nitrogen tank, and a finished product receiving tank is fixedly installed on the second gate.

[0021] Further, the hydrofluoric acid receiving tank device comprises a hydrofluoric acid receiving tank and a hydrogen fluoride absorption tower, the adsorption tower is fixedly connected with the hydrogen fluoride absorption tower, and the hydrofluoric acid receiving tank is fixedly connected with the bottom of the hydrogen fluoride absorption tower.

[0022] Further, the caustic receiving tank device comprises a caustic receiving tank and a caustic tower, the caustic tower is fixedly connected with the hydrogen fluoride absorption tower, the caustic receiving tank is fixedly connected with the caustic tower, and an induced draft fan is installed on the caustic tower.

[0023] To sum up, the present application has at least one of the following beneficial technical effects:

[0024] 1. The neutralization reaction between the weakly basic anion exchange resin, the strongly basic anion exchange resin and the acidic substances in the additive can remove the acidic substances in the additive for the first time, and because the filler is a mixture of potassium fluoride solid and inert filler, the acidic substances in the additive can be removed for the second time, thereby improving the deacidification effect;

[0025] 2. The steam generated by the steam box is introduced into the heating cavity by starting the first air pump to heat the adsorption tank, so that the potassium bifluoride on the adsorption tank is decomposed into potassium fluoride and hydrogen fluoride. The potassium fluoride is reused in the adsorption tank, the hydrogen fluoride enters the hydrogen fluoride absorption tower with nitrogen to absorb most of the hydrogen fluoride, then enters the caustic tower to remove residual acidic gas, and finally enters the tail gas treatment system through the induced draft fan. At the same time, after the steam is cooled, water droplets are formed, which enter the filter tank along the inner wall of the heating cavity. Starting the motor, the motor drives the shaft and multiple stirring paddles to rotate, and the multiple stirring paddles drive the wastewater to form a vortex to filter the impurities in the wastewater onto the ash bucket. Then the filtered water is collected through the collecting pipe, thereby improving the utilization rate of water resources. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure in the first embodiment of the present application;

[0027] Figure 2 is a schematic diagram of the internal structure in the first embodiment of the present application;

[0028] Figure 3 is a schematic diagram of the connection structure of the steam device and the filtering device in the first embodiment of the present application;

[0029] Figure 4 is a schematic diagram of the filtering device structure in the first embodiment of the present application.

[0030] : 1, steam pipe; 2, steam box; 3, first air pump; 4, first gate; 5, adsorption tower; 6, heating cavity; 7, hydrogen fluoride absorption tower; 8, caustic washing tower; 9, finished product receiving tank; 10, second gate; 11, three-way pipe; 12, second air pump; 13, nitrogen tank; 14, hydrofluoric acid receiving tank; 15, induced draft fan; 16, caustic washing receiving tank; 17, collecting pipe; 18, weakly basic anion exchange resin; 19, strongly basic anion exchange resin; 20, filter clamp plate; 21, filler; 22, filter tank; 23, motor; 24, rotating shaft; 25, stirring paddle; 26, opening; 27, ash bucket; 28, fixed frame; 29, filter cavity. DETAILED DESCRIPTION

[0031] Example One

[0032] The following will be described in detail in combination with the accompanying drawings Figures 1-4 Example One in the present application will be further described in detail.

[0033] The installation method of a deacidification device for a fluorine-containing lithium battery electrolyte additive refers to Figure 1 , comprising:

[0034] The adsorption tower 5 is fixedly connected to the first gate 4.

[0035] The first gate 4 is fixedly connected to the adsorption tower 5.

[0036] The steam device is provided on one side of the adsorption tower 5.

[0037] The filter device is provided on the steam device.

[0038] The deacidification device is provided on the adsorption tower 5.

[0039] The nitrogen device is provided on the adsorption tower 5.

[0040] The hydrofluoric acid receiving tank device is provided on one side of the adsorption tower 5.

[0041] The caustic washing receiving tank device is provided on one side of the hydrofluoric acid receiving tank device.

[0042] Referring to Figures 2-4 , the steam device includes a steam box 2, a steam pipe 1, and a collecting pipe 17, the adsorption tower 5 is fixedly connected to a first air pump 3, the steam pipe 1 is fixedly connected to the steam box 2 and the first air pump 3, and the adsorption tower 5 is fixedly connected to a heating cavity 6.

[0043] The filtering device comprises a filtering tank 22, a fixed frame 28, a rotating shaft 24 and a plurality of stirring paddles 25, the filtering tank 22 is installed at the bottom of the heating cavity 6, the fixed frame 28 is fixedly connected to the filtering tank 22, the rotating shaft 24 is rotatably connected to the fixed frame 28, the plurality of stirring paddles 25 are fixedly connected to the rotating shaft 24, two ends of the collecting pipe 17 are fixedly connected to the steam box 2 and the filtering tank 22 respectively, the bottom of the filtering tank 22 is fixedly connected with a motor 23, the output shaft of the motor 23 is fixedly connected to the rotating shaft 24, a hopper 27 is installed on the filtering tank 22, an opening 26 is formed on the hopper 27, the hopper 27 is fixedly connected with a filtering cavity 29, the filtering cavity 29 is fixedly connected to the fixed frame 28, and the filtering device is used for filtering and collecting water in the heating cavity 6.

[0044] The deacidification device comprises weakly basic anion exchange resin 18, strongly basic anion exchange resin 19 and filter clamp plate 20, the weakly basic anion exchange resin 18 is fixedly connected to the filtering tank 22, the weakly basic anion exchange resin 18 is fixedly connected to the strongly basic anion exchange resin 19, the filter clamp plate 20 is fixedly connected to the adsorption tower 5, and the filter clamp plate 20 is embedded with filler 21.

[0045] The nitrogen device comprises a nitrogen tank 13 and a tee pipe 11, the tee pipe 11 is fixedly connected to the adsorption tower 5, the tee pipe 11 is provided with a second gate 10 and a second gas pump 12, the second gas pump 12 is installed on the nitrogen tank 13, and the second gate 10 is fixedly provided with a finished product receiving tank 9.

[0046] The hydrofluoric acid receiving tank device comprises a hydrofluoric acid receiving tank 14 and a hydrogen fluoride absorption tower 7, the adsorption tower 5 is fixedly connected to the hydrogen fluoride absorption tower 7, and the hydrofluoric acid receiving tank 14 is fixedly connected to the bottom of the hydrogen fluoride absorption tower 7.

[0047] The caustic wash receiving tank device comprises a caustic wash receiving tank 16 and a caustic wash tower 8, the caustic wash tower 8 is fixedly connected to the hydrogen fluoride absorption tower 7, the caustic wash receiving tank 16 is fixedly connected to the caustic wash tower 8, and the caustic wash tower 8 is provided with an induced draft fan 15.

[0048] The implementation principle of the fluorine-containing lithium battery electrolyte additive deacidification device is as follows: the additive is put into the first gate 4, and a neutralization reaction is generated between the weakly basic anion exchange resin 18 and the strongly basic anion exchange resin 19 and the acidic substances in the additive, so that the acidic substances in the additive can be removed for the first time, and because the filler 21 is a mixture of potassium fluoride solid and inert filler, the remaining acidic substances in the additive can be removed, then steam is generated through the steam tank 2, the first air pump 3 is started to guide the steam into the inside of the heating cavity 6, the adsorption tank 4 is heated, the potassium bifluoride on the adsorption tank 4 is decomposed into potassium fluoride and hydrogen fluoride, the potassium fluoride is left in the adsorption tower 5 for repeated use, the hydrogen fluoride enters the hydrogen fluoride absorption tower 7 with nitrogen to absorb most of the hydrogen fluoride, then enters the alkali washing tower 8 to remove residual acidic gas, and finally enters the tail gas treatment system through the induced draft fan 15, at the same time, after the steam is cooled, water droplets are formed, enter the filter tank 22 along the inner wall of the heating cavity 6, the motor 23 is started, the motor 23 drives the rotating shaft 24 and the plurality of stirring paddles 25 to rotate, the plurality of stirring paddles 25 drive the waste water to form a vortex, and impurities in the waste water are filtered onto the ash bucket 27, then the filtered water is collected through the collecting pipe 17, and the water is collected and utilized, so that the utilization rate of water resources is improved.

[0049] Embodiment two

[0050] The difference between the embodiment and the embodiment one is that the acid detection instrument is fixedly installed on the finished product receiving tank 9, and the acid detection instrument can detect the content of the acidic substances in the additive.

[0051] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A deacidification device for fluorine-containing lithium battery electrolyte additives, characterized by: The utility model relates to a kind of hydrogen fluoride production device, including: Adsorption tower (5); First gate (4) is fixedly connected on adsorption tower (5); Steam device, steam device is provided in one side of adsorption tower (5); Filtering device, filtering device is provided on steam device; Deacidification device, deacidification device is provided on adsorption tower (5); Nitrogen device, nitrogen device is provided on adsorption tower (5); Hydrofluoric acid receiving tank device, hydrofluoric acid receiving tank device is provided in one side of adsorption tower (5); Alkaline cleaning receiving tank device, alkaline cleaning receiving tank is provided in one side of hydrofluoric acid receiving tank device.

2. A deacidifying device of a fluorine-containing lithium battery electrolyte additive according to claim 1, characterized in that: The steam device includes a steam tank (2), a steam pipe (1), and a collection pipe (17). The adsorption tower (5) is fixedly connected with a first air pump (3). The steam pipe (1) is fixedly connected with the steam tank (2) and the first air pump (3), respectively. The adsorption tower (5) is fixedly connected with a heating cavity (6).

3. A deacidifying device of a fluorine-containing lithium battery electrolyte additive according to claim 2, characterized in that: The filtering device includes a filter tank (22), a fixed frame (28), a rotating shaft (24), and a plurality of stirring paddles (25). The filter tank (22) is installed at the bottom of the heating cavity (6). The fixed frame (28) is fixedly connected with the filter tank (22). The rotating shaft (24) is rotatably connected with the fixed frame (28). The plurality of stirring paddles (25) are fixedly connected with the rotating shaft (24). The two ends of the collection pipe (17) are fixedly connected with the steam tank (2) and the filter tank (22), respectively. The bottom of the filter tank (22) is fixedly connected with a motor (23). The output shaft of the motor (23) is fixedly connected with the rotating shaft (24). The filter tank (22) is installed with an ash hopper (27). The ash hopper (27) is provided with an opening (26). The ash hopper (27) is fixedly connected with a filter cavity (29). The filter cavity (29) is fixedly connected with the fixed frame (28). The filtering device is used for filtering and collecting water in the heating cavity (6).

4. A deacidifying device for fluorine-containing lithium battery electrolyte additives according to claim 3, characterized in that: The deacidification device includes weakly basic anion exchange resin (18), strongly basic anion exchange resin (19), and a filter clamp (20). The weakly basic anion exchange resin (18) is fixedly connected with the filter tank (22). The weakly basic anion exchange resin (18) is fixedly connected with the strongly basic anion exchange resin (19). The filter clamp (20) is fixedly connected with the adsorption tower (5). The filter clamp (20) is embedded with a filler (21).

5. A deacidifying device for fluorine-containing lithium battery electrolyte additives according to claim 4, characterized in that: The nitrogen device includes a nitrogen tank (13) and a tee pipe (11). The tee pipe (11) is fixedly connected with the adsorption tower (5). The tee pipe (11) is installed with a second gate (10) and a second air pump (12). The second air pump (12) is installed on the nitrogen tank (13). The second gate (10) is fixedly installed with a finished product receiving tank (9).

6. A deacidifying device for fluorine-containing lithium battery electrolyte additives according to claim 5, characterized in that: The hydrofluoric acid receiving tank device includes a hydrofluoric acid receiving tank (14) and a hydrogen fluoride absorption tower (7). The adsorption tower (5) is fixedly connected with the hydrogen fluoride absorption tower (7). The hydrofluoric acid receiving tank (14) is fixedly connected with the bottom of the hydrogen fluoride absorption tower (7).

7. A deacidifying device for fluorine-containing lithium battery electrolyte additives according to claim 6, characterized in that: The caustic receiving tank device comprises a caustic receiving tank (16) and a caustic tower (8), the caustic tower (8) is fixedly connected with the hydrogen fluoride absorption tower (7), the caustic receiving tank (16) is fixedly connected with the caustic tower (8), and an induced draft fan (15) is installed on the caustic tower (8).

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