Device for extracting white oil from lithium battery oil film

Abstract

The utility model relates to the technical field of lithium battery diaphragm resource utilization, in particular to a lithium battery oil film white oil extraction device which comprises a reaction kettle and a filter screen arranged in the reaction kettle and located between the top and the bottom of the reaction kettle, and the filter screen divides an inner cavity of the reaction kettle into an extraction cavity and a filtrate cavity; the reaction kettle is provided with a feed port, a discharge port and a liquid outlet, the feed port and the discharge port are communicated to the extraction cavity, and the liquid outlet is communicated to the filtrate cavity; the device further comprises a purging assembly, and the purging assembly is arranged in the extraction cavity and used for blowing gas into the reaction kettle. According to the utility model, air is blown into the reaction kettle through the purging assembly, and a solvent left on the surface of the PE film is purged, so that the cleanliness of the PE film after extraction is improved, the subsequent granulation of the PE film is facilitated, and the effective disposal and resource recovery of the lithium battery oil film are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of extraction device more particularly, relate to a kind of lithium battery oil film extraction white oil device. BACKGROUND

[0002] The diaphragm is an important component of lithium ion battery, which is located between the positive and negative electrodes inside the battery, ensuring the passage of lithium ions while hindering electron transmission. The performance of the diaphragm determines the interface structure, internal resistance, etc. of the battery, directly affecting the capacity, cycle, and safety performance of the battery. A diaphragm with excellent performance plays an important role in improving the overall performance of the battery.

[0003] The waste oil film is mainly the diaphragm and the leftover material produced during the production of the battery diaphragm. These leftover materials still contain a large amount of PE material and high-quality white oil, and are generally considered as hazardous waste. If not disposed of properly, it not only wastes resources, but also pollutes the environment. SUMMARY

[0004] The utility model aims at overcoming the deficiency that the lithium battery oil film is not easy to be effectively disposed of and recycled in the prior art, and provides a lithium battery oil film extraction white oil device that facilitates the effective disposal and recycling of lithium battery oil film.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of:

[0006] A lithium battery oil film extraction white oil device is provided, which includes a reaction kettle and a filter screen arranged in the reaction kettle and located between the top and bottom of the reaction kettle. The filter screen divides the inner cavity of the reaction kettle into an extraction cavity and a filtrate cavity. The reaction kettle has a feed inlet, a discharge outlet, and a liquid outlet. The feed inlet and the discharge outlet are both connected to the extraction cavity, and the liquid outlet is connected to the filtrate cavity. The device also includes a purging assembly arranged in the extraction cavity and used to blow gas into the interior of the reaction kettle.

[0007] The lithium battery oil film extraction white oil device of the utility model closes the discharge outlet and the liquid outlet, pours the waste oil film and the extraction agent after being crushed by the crusher into the reaction kettle from the feed inlet, closes the feed inlet, and the extraction agent in the reaction kettle extracts white oil from the waste oil film. After the extraction is completed, the liquid outlet is opened to discharge the solvent in the reaction kettle. After the solvent is basically emptied, the purging assembly blows air into the reaction kettle to purge the solvent remaining on the surface of the PE film, thereby improving the cleanliness of the PE film after extraction, facilitating subsequent granulation of the PE film, and facilitating effective disposal and recycling of the lithium battery oil film. After purging is completed, the purging assembly is closed, and the PE film is discharged from the discharge outlet.

[0008] Further, the purging assembly comprises a purging pipe, which is arranged on the inner wall of the reaction kettle, and one end of the purging pipe is used for communicating with the air source. The air source is started to purge the PE film in the reaction kettle through the purging pipe. By arranging the purging pipe on the inner wall of the reaction kettle, the PE film is prevented from remaining on the purging pipe, and the PE film is conveniently discharged from the discharge port.

[0009] Further, the purging pipe is provided with air blowing holes, which are arranged obliquely towards the inside of the reaction kettle. By arranging the air blowing holes obliquely, the PE film in the reaction kettle can be better purged.

[0010] Further, the purging assembly further comprises a heating assembly connected with the purging pipe. The air for purging is heated by the heating assembly, and the PE film is purged by hot air, so that the purging time is short and the purging efficiency is high.

[0011] Further, it further comprises a stirring mechanism connected with the reaction kettle, and the stirring mechanism is located in the extraction cavity. By arranging the stirring mechanism, the stirring during extraction can accelerate the extraction speed, and the stirring during purging can accelerate the purging speed.

[0012] Further, the stirring mechanism comprises a motor, a stirring shaft and stirring blades, the motor is connected with the reaction kettle, the stirring shaft is connected with the output end of the motor, the stirring blades are connected with the stirring shaft, and the stirring blades are located in the extraction cavity. During stirring, the motor is started, the motor drives the stirring shaft to rotate, the stirring shaft drives the stirring blades to rotate, and the stirring blades stir the reaction kettle.

[0013] Further, it further comprises a discharging assembly connected with the reaction kettle, and the discharging assembly is located in the extraction cavity. By arranging the discharging assembly, the PE film after extraction can be discharged from the discharge port through the discharging assembly.

[0014] Further, the discharging assembly comprises an anchor blade connected with the stirring shaft, and the anchor blade is attached to the end face of the filter screen. By allowing the anchor blade to move with the stirring shaft, the driving mechanism can be reduced, thereby reducing the cost. At the same time, by allowing the anchor blade to abut against the filter screen, the PE film on the filter screen can be conveniently discharged through the discharge port.

[0015] Further, it further comprises a constant temperature mechanism connected with the reaction kettle. By arranging the constant temperature mechanism, the temperature of the reaction kettle during extraction is controlled, and the reaction efficiency is improved.

[0016] Further, the constant temperature mechanism comprises a constant temperature jacket and a constant temperature water supply device, the constant temperature jacket is sleeved on the reaction kettle, the constant temperature water supply device has a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the constant temperature jacket.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The lithium battery oil film extraction white oil device of the utility model, through the blowing component, blows air into the reaction kettle, blows the solvent remaining on the surface of the PE film clean, thereby improving the cleanliness of the PE film after extraction, facilitating subsequent granulation of the PE film, and facilitating effective disposal and resource recycling of the lithium battery oil film. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structure schematic view of the lithium battery oil film extraction white oil device in example one;

[0020] Figure 2 is the structure schematic view of the lithium battery oil film extraction white oil device in example two;

[0021] Figure 3 is the structure schematic view of the stirring mechanism and the unloading assembly.

[0022] In the drawings: 100, reaction kettle;110, extraction cavity;111, feed inlet;112, discharge port;120, filtrate cavity;121, liquid outlet;200, filter screen;300, blowing component;310, blowing pipe;311, air blowing hole;320, heating component;400, stirring mechanism;410, motor;420, stirring shaft;430, stirring blade;440, speed reducer;450, mechanical seal;500, unloading assembly;600, constant temperature mechanism;610, constant temperature jacket;620, constant temperature water supply device;621, water inlet;622, water outlet. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The present application will be further described below with reference to the specific embodiments. In the drawings, only for exemplary description, the drawings represent only schematic views, rather than actual views, and should not be construed as a limitation of the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only for exemplary description, and cannot be construed as a limitation of the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. In addition, if the present application has a description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" appearing throughout the text means that it includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes.

[0025] Embodiment one

[0026] The present embodiment is a first embodiment of a lithium battery oil film extraction white oil device, as shown in Figure 1As shown, it comprises a reaction kettle 100 and a filter screen 200 arranged in the reaction kettle 100 and located between the top and bottom of the reaction kettle 100, the filter screen 200 is preferably made of stainless steel, and the filter screen 200 divides the inner cavity of the reaction kettle 100 into an extraction cavity 110 and a filtrate cavity 120; the reaction kettle 100 has a feed port 111, a discharge port 112 and a liquid outlet 121, the feed port 111 and the discharge port 112 are both communicated to the extraction cavity 110, and the liquid outlet 121 is communicated to the filtrate cavity 120; the feed port 111 can be provided with two, one is an oil film waste feeding port for feeding oil film waste, and the other is an extractant feeding port for connecting with the extractant feeding pipe, and a solvent feeding valve is installed on the feeding pipe to control the feeding of the extractant by opening and closing the solvent feeding valve. The PE film discharge pipe is installed at the discharge port 112, and the PE film discharge valve is installed on the PE film discharge pipe. The solvent venting pipe is installed at the liquid outlet 121, and the solvent venting valve is installed on the solvent venting pipe. It also comprises a purging assembly 300 arranged in the extraction cavity 110 and used for blowing gas into the interior of the reaction kettle 100, and the purging assembly 300 is used for purging the PE film in the reaction kettle 100.

[0027] The working principle of the lithium battery oil film extraction white oil device of the embodiment is as follows:

[0028] The discharge port 112 and the liquid outlet 121 are closed, the oil film waste after being crushed by the crusher is fed into the reaction kettle 100 through the oil film waste feeding port, the solvent feeding valve is opened, and the extractant is fed into the reaction kettle 100, the reaction kettle 100 preferably adopts a full immersion type extraction reaction, the oil film waste feeding port and the solvent feeding valve are closed, and the extractant in the reaction kettle 100 extracts the white oil of the oil film waste. After the extraction is completed, the solvent venting valve is opened, and the solvent in the reaction kettle 100 is discharged through the liquid outlet 121, after the solvent is basically exhausted, air is blown into the reaction kettle through the purging assembly 300, the air flows in the reaction kettle 100, and the residual solvent on the surface of the PE film is blown clean, so that the cleanliness of the PE film after extraction is improved, and the subsequent granulation of the PE film is facilitated. After the purging is completed, the purging assembly 300 is closed, and the PE film is discharged through the discharge port 112.

[0029] Embodiment two

[0030] The second embodiment of the lithium battery oil film extraction white oil device is based on the first embodiment, as shown in Figure 2 It also comprises a stirring mechanism 400 connected with the reaction kettle 100 and located in the extraction cavity 110. By arranging the stirring mechanism 400, the oil film waste and the extractant can be mixed more uniformly during extraction, and the extraction speed can be accelerated. During purging, the PE film can be dispersed, and the purging speed can be accelerated.

[0031] The device further comprises a discharging assembly 500 connected with the reaction kettle 100, and the discharging assembly 500 is located in the extraction cavity 110. By arranging the discharging assembly 500, the PE film after extraction can be discharged from the discharge port 112 through the discharging assembly 500. The discharging assembly 500 can be arranged in various structures, such as rotating paddle, rotating or translating scraper, or screw conveying device, and other structures capable of discharging.

[0032] The device further comprises a constant temperature mechanism 600 connected with the reaction kettle 100. By arranging the constant temperature mechanism 600, the temperature of the reaction kettle 100 can be controlled during extraction, thereby improving the reaction efficiency. The constant temperature mechanism 600 can control the temperature of the reaction kettle 100 by using water bath heating, electric heating or hot air blowing, and a temperature sensor can be arranged in the reaction kettle 100 to monitor the temperature in the reaction kettle 100 in real time.

[0033] The working principle of the lithium battery oil film extraction white oil device of the embodiment is as follows:

[0034] The discharge port 112 and the liquid outlet 121 are closed, the waste oil film after being crushed by the crusher is put into the reaction kettle 100 through the waste oil film feeding port, the solvent feeding valve is opened, and the extraction agent is put into the reaction kettle 100. The reaction kettle 100 preferably adopts a full immersion type extraction reaction, the waste oil film feeding port and the solvent feeding valve are closed, the constant temperature mechanism 600 is started to heat the reaction kettle 100, and the stirring mechanism 400 is started to stir. The extraction agent in the reaction kettle 100 extracts white oil from the waste oil film. After the extraction is completed, the solvent emptying valve is opened, and the solvent in the reaction kettle 100 is discharged through the liquid outlet 121. After the solvent is basically emptied, air is blown into the reaction kettle through the purging assembly 300. At the same time of purging, the stirring mechanism 400 can be started to disperse the PE film. The air flows in the reaction kettle 100, blows away the solvent remaining on the surface of the PE film, thereby improving the cleanliness of the PE film after extraction, and facilitating subsequent granulation of the PE film. After the purging is completed, the purging assembly 300 is closed, the discharging assembly 500 and the PE film discharging valve are opened, and the PE film is discharged through the discharge port 112.

[0035] Embodiment three

[0036] The third embodiment of the lithium battery oil film extraction white oil device is similar to the second embodiment, and the difference is that, as shown in FIG. 3, the discharging assembly 500 is arranged in the extraction cavity 110, and the discharging assembly 500 is connected with the reaction kettle 100. The discharging assembly 500 is arranged in the extraction cavity 110, and the discharging assembly 500 is connected with the reaction kettle 100. The discharging assembly 500 is arranged in the extraction cavity 110, and the discharging assembly 500 is connected with the reaction kettle 100. Figure 2As shown, the blowing assembly 300 comprises a blowing pipe 310, the blowing pipe 310 is arranged on the inner wall of the reaction kettle 100, that is, the blowing pipe 310 is arranged as an annular air blowing pipe, and one end of the blowing pipe 310 is used for communication with an air source. The air source is started to blow the PE film in the reaction kettle 100 through the blowing pipe 310. By arranging the blowing pipe 310 on the inner wall of the reaction kettle 100, the PE film is prevented from remaining on the blowing pipe 310, and the PE film is facilitated to be discharged from the discharge port 112 subsequently.

[0037] The blowing pipe 310 has blowing holes 311, the blowing holes 311 are arranged at equal intervals on the annular pipe, the interval is 50-150mm, the blowing holes 311 are arranged obliquely towards the inside of the reaction kettle 100, preferably obliquely upwards, and the inclination angle is 30°-60°. By arranging the blowing holes 311 obliquely, the entire inside of the reaction kettle is uniformly blown, there is basically no dead angle, and the PE film in the inside of the reaction kettle 100 can be better blown.

[0038] The blowing pipe 310 can be arranged at any position in the reaction kettle 100, when the blowing pipe 310 is arranged above, the blowing holes 311 are obliquely downward, and when the blowing pipe 310 is arranged below, the blowing holes 311 are obliquely upward. Figure 2 As shown, in the embodiment, the blowing pipe 310 is preferably arranged below close to the filter screen 200, so that the PE film on the filter screen 200 and above the filter screen 200 can be blown as much as possible.

[0039] The blowing assembly 300 further comprises a heating assembly 320 connected with the blowing pipe 310. The blowing air is heated by the heating assembly 320, the PE film is blown by the hot air, the blowing time is short, and the blowing efficiency is high. The heating assembly 320 is specifically arranged as a heating resistance wire, and the heating resistance wire is installed between the blowing pipe 310 and the air source, so that the blowing air can be heated instantaneously.

[0040] The constant temperature mechanism 600 comprises a constant temperature jacket 610 and a constant temperature water supply device 620. The constant temperature jacket 610 is sleeved on the outside of the reaction kettle 100. The constant temperature water supply device 620 has a water inlet 621 and a water outlet 622, both of which are in communication with the constant temperature jacket 610. That is, the constant temperature circulating water is used to flow in the constant temperature jacket 610 to heat the reaction kettle 100. The inlet and outlet of the circulating water on the constant temperature jacket 610 adopt the way of entering from the bottom and discharging from the top. The inlet and outlet are arranged oppositely at 180°. In this embodiment, the constant temperature water supply device 620 is specifically a constant temperature water bath. When the temperature is controlled, the constant temperature water supply device 620 heats the water. The heated water enters the constant temperature jacket 610 through the water outlet 622 to heat the reaction kettle 100. The water that is heat-exchanged with the reaction kettle 100 returns to the constant temperature water supply device 620 through the water inlet 621 to be heated again. The reaction temperature can be controlled at the optimal reaction temperature all the time, and the reaction rate is improved.

[0041] Example Four

[0042] This embodiment is a fourth embodiment of a lithium battery oil film extraction white oil device. This embodiment is similar to example two, except that, as shown in Figure 3 The stirring mechanism 400 comprises a motor 410, a stirring shaft 420 and stirring blades 430. The motor 410 is connected with the reaction kettle 100. The stirring shaft 420 is connected with the output end of the motor 410. A speed reducer can be arranged between the output end of the motor 410 and the stirring shaft 420 to control the rotating speed of the motor 410. The stirring shaft 420 is rotatably connected with the reaction kettle 100. A mechanical seal is arranged between the stirring shaft 420 and the reaction kettle 100. The mechanical seal is a double-end-face type mechanical seal. Since the solvent for extracting white oil is usually toxic, flammable, explosive and volatile, such as dichloromethane and trichloromethane, the double-end-face type mechanical seal is used to enable the reaction kettle to have good and safe sealing effect. The stirring blades 430 are connected with the stirring shaft 420 and located above the filter screen 200. When stirring, the motor 410 is started to drive the stirring shaft 420 to rotate, and the stirring shaft 420 drives the stirring blades 430 to rotate to stir the reaction kettle 100. In this embodiment, the stirring blades 430 are double-spiral belt type paddles, which can efficiently and uniformly stir the mixture in the whole reaction kettle.

[0043] The unloading assembly 500 comprises an anchor type paddle connected with the stirring shaft 420 and attached to the end face of the filter screen 200. In this embodiment, as shown in Figure 2As shown, the bottom of the reaction kettle 100 is a conical bottom, the anchor blade and the conical bottom of the kettle body have the same inclination angle, the anchor blade is preferably attached to the inner wall of the kettle body, the discharge port 112 is located at the anchor blade, and the lower end of the discharge port 112 is attached to the filter screen 200. By allowing the stirring shaft 420 to drive the anchor blade to move, the driving mechanism can be reduced, thereby reducing the cost; at the same time, by allowing the anchor blade to be attached to the filter screen 200, the PE film in the reaction kettle 100 can be easily discharged through the discharge port 112, without the need for manual unloading.

[0044] Example Five

[0045] This embodiment is a specific implementation of the lithium battery oil film extraction white oil device.

[0046] First, the waste oil film crushed by the crusher is put into the extraction reaction kettle 100, and the addition amount is 100 kg, then 500 kg of chloroform organic solvent is injected into the extraction reaction kettle 100, all the valves are closed, and the stirring mechanism 400 is started at the same time to carry out the extraction reaction, and the constant temperature jacket 610 is used to carry out continuous circulation and heat preservation with a water bath at 40°C;

[0047] After 3 hours of extraction reaction, the extraction reaction is completed, then the bottom solvent vent valve is opened, the solvent is discharged to the solvent recovery tank, and the PE film after extraction is intercepted by the bottom filter screen 200 and remains in the reaction kettle 100;

[0048] After the solvent in the reaction kettle 100 is basically emptied, air is introduced into the annular air purge pipe, and the heating resistance wire is turned on to heat the air entering the kettle, so that the solvent remaining on the surface of the PE film is blown clean;

[0049] After the blowing is completed, the air source, the heating resistance wire and the solvent vent valve are closed, then the unloading valve and the stirring mechanism 400 are opened, the PE film is automatically slid from the unloading pipe under the pushing action of the anchor blade at the bottom of the stirring mechanism 400 and is collected with a ton bag, which is used for subsequent granulation.

[0050] The mass of the PE film after extraction is 46.7 kg, and the mass of the white oil recovered by low-temperature evaporation of the recovered extraction solvent is 44.2 kg. The recovered white oil is high-value white oil, and the PE film can be used as a raw material for plastic granulation.

[0051] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0052] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A lithium battery oil film extraction white oil device, comprising a reaction kettle (100) and a filter screen (200) arranged in the reaction kettle (100) and located between the top and bottom of the reaction kettle (100), the filter screen (200) divides the inner cavity of the reaction kettle (100) into an extraction cavity (110) and a filtrate cavity (120); characterized in that, The reaction kettle (100) has a feed port (111), a discharge port (112) and a liquid outlet (121), the feed port (111) and the discharge port (112) are communicated to the extraction cavity (110), and the liquid outlet (121) is communicated to the filtrate cavity (120); It also includes a purging assembly (300), which is arranged in the extraction cavity (110) and used for blowing gas to the inside of the reaction kettle (100).

2. The lithium battery oil-film extraction white oil apparatus of claim 1, wherein, The purging assembly (300) includes a purging pipe (310) arranged on the inner wall of the reaction kettle (100), one end of the purging pipe (310) being used for communication with an air source.

3. The lithium battery oil-film extraction white oil apparatus of claim 2, wherein, The purging pipe (310) has a gas blowing hole (311) inclined towards the inside of the reaction kettle (100).

4. The lithium battery oil-film extraction white oil apparatus of claim 2, wherein, The purging assembly (300) further includes a heating assembly (320) connected with the purging pipe (310).

5. The lithium battery oil-film extraction white oil apparatus of claim 1, wherein, It also includes a stirring mechanism (400) connected with the reaction kettle (100), and the stirring mechanism (400) is located in the extraction cavity (110).

6. The lithium battery oil-film extraction white oil apparatus of claim 5, wherein, The stirring mechanism (400) includes a motor (410), a stirring shaft (420) and stirring blades (430), the motor (410) is connected with the reaction kettle (100), the stirring shaft (420) is connected with the output end of the motor (410), the stirring blades (430) are connected with the stirring shaft (420), and the stirring blades (430) are located in the extraction cavity (110).

7. The lithium battery oil-film extraction white oil apparatus of claim 6, wherein, It also includes a discharge assembly (500) connected with the reaction kettle (100), and the discharge assembly (500) is located in the extraction cavity (110).

8. The lithium battery oil-film extraction white oil apparatus of claim 7, wherein, The discharge assembly (500) includes an anchor blade connected with the stirring shaft (420), and the anchor blade is attached to the end face of the filter screen (200).

9. The lithium battery oil film extraction white oil apparatus of any one of claims 1 to 8, wherein, It also includes a constant temperature mechanism (600) connected with the reaction kettle (100).

10. The lithium battery oil-film extraction white oil apparatus of claim 9, wherein, The constant temperature mechanism (600) includes a constant temperature jacket (610) and a constant temperature water supply device (620), the constant temperature jacket (610) is sleeved on the outside of the reaction kettle (100), and the constant temperature water supply device (620) has a water inlet (621) and a water outlet (622), both of which are communicated with the constant temperature jacket (610).

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