Drying and separating device and lithium battery recycling equipment

Abstract

The utility model discloses a drying and separating device and lithium battery recycling equipment, and relates to the technical field of lithium battery recycling. The drying and separating device comprises a treatment tank, an air blower, an exhaust fan, a feeding pipe, a screen and a discharger. The exhaust fan is connected to the top of the treatment tank, the discharger is connected to the bottom of the treatment tank, the feeding pipe and the air blower are connected to the side wall of the treatment tank, the inner diameter of the feeding pipe is smaller than that of the treatment tank, the screen is installed in the treatment tank, and the feeding pipe, the air blower and the screen are sequentially arranged from top to bottom. Compared with the prior art, the drying and separating device provided by the utility model adopts the feeding pipe, the blower and the exhaust fan which are connected with the treatment tank as well as the screen arranged in the treatment tank, so that solid materials can be separated into a current collector and an active material while being air-dried, the labor cost is reduced, and the separating efficiency is improved; the drying efficiency is improved, the separation precision is improved, and the separation effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery recycling, and in particular to a drying and separation device and lithium battery recycling equipment. Background Art

[0002] At present, in the recycling process of lithium batteries, wet immersion is generally used to process the electrode fragments to achieve the separation of the current collector and the active material. After the separation, the active material and the current collector are mixed in the reaction solution. It is necessary to separate the active material and the current collector by manual sorting and then dry them separately. This is time-consuming and labor-intensive, with high labor costs, low separation efficiency, low drying efficiency, low manual sorting accuracy, poor sorting effect, and easy mixing of the current collector into the active material, resulting in reduced purity of the active material and affecting its economic value.

[0003] In view of this, it is particularly important to design and manufacture a drying and separation device with high separation efficiency, high drying efficiency and good separation effect, as well as a lithium battery recycling equipment, especially in lithium battery recycling. Utility Model Content

[0004] The purpose of the utility model is to provide a drying and separation device that can separate solid materials into collectors and active materials while air-drying them, thereby reducing labor costs, improving separation efficiency, improving drying efficiency, improving separation accuracy, and ensuring separation effects.

[0005] Another object of the present invention is to provide a lithium battery recycling device that can separate solid materials into collectors and active materials while air-drying them, thereby reducing labor costs, improving separation efficiency, improving drying efficiency, improving separation accuracy, and ensuring separation effects.

[0006] The present invention is achieved by adopting the following technical solutions.

[0007] A drying and separation device, for drying and separating solid materials obtained after wet processing of electrode fragments, the drying and separation device comprises a processing tank, a blower, an exhaust fan, a feed pipe, a screen and a discharger, the exhaust fan is connected to the top of the processing tank, the discharger is connected to the bottom of the processing tank, the feed pipe and the blower are both connected to the side wall of the processing tank, the inner diameter of the feed pipe is smaller than the inner diameter of the processing tank, the screen is installed in the processing tank, the feed pipe, the blower and the screen are arranged in sequence from top to bottom, the feed pipe is used to feed solid materials, the exhaust air volume of the exhaust fan is greater than the air outlet air volume of the blower, so as to form a negative pressure in the processing tank, thereby sucking the solid materials in the feed pipe into the processing tank, the blower is used to blow air upward along the inner wall of the processing tank to form a spiral wind and dry the solid materials, so that the solid materials are separated into a current collector and an active material, the volume of the current collector is greater than the volume of the active material, and the density of the current collector is less than the density of the active material, the screen is used to collect the current collector, and the discharger is used to collect the active material leaking downward from the screen;

[0008] The air volume of the blower satisfies the following relationship to prevent the current collector and active material from moving upward:

[0009]

[0010] v mf1 =k×v mf ;

[0011]

[0012] Where Q is the maximum air volume of the hair dryer, in m 3 / h;v mf1 is the correction of the minimum fluidization velocity, in m / s; D0 is the inner diameter of the treatment tank, in m; k is the correction coefficient, ranging from 0.6 to 1; v mf is the minimum fluidization velocity of the collector, in m / s; ρ is the air density, in kg / m 3 ρ p is the density of the current collector, in kg / m 3 ;D p is the average diameter of the current collector, in m; μ is the air viscosity, in Pa·s.

[0013] Optionally, the processing tank includes a flow tube and a collection funnel, the collection funnel is relatively provided with a large end and a small end, the large end is connected to the flow tube, and the small end is connected to the discharger, the screen is arranged between the flow tube and the collection funnel, and the blower, exhaust fan and feed pipe are all connected to the flow tube.

[0014] Optionally, the flow tube includes a top wall and a peripheral wall, one end of the peripheral wall is connected to the top wall, and the other end is connected to the large end, the exhaust fan is connected to the middle of the top wall, and the feed pipe and the blower are relatively arranged at the two ends of the peripheral wall in its axial direction, and are both connected to the peripheral wall.

[0015] Optionally, the feed pipe includes a feed section and a baffle section that are interconnected. The baffle section extends into the processing tank. A baffle is provided at one end of the baffle section away from the feed section. A feed port is provided at the bottom of the baffle section. The baffle is used to collide with the solid material during the feeding process to crush the solid material and allow it to enter the processing tank downward from the feed port.

[0016] Optionally, the cross section of the material blocking section is semicircular; and / or the baffle is arc-shaped.

[0017] Optionally, a side wall of the processing tank is provided with a clearance port, in which a sealing block is detachably installed. The clearance port is used for allowing the screen to be taken out after the sealing block is removed, so as to realize the discharge of the current collector.

[0018] Optionally, the drying and separation device further comprises a vibrator connected to the screen, and the vibrator is used to drive the screen to vibrate so as to shake off the active material remaining on the screen.

[0019] Optionally, the drying and separation device further includes a heater, which is connected to the hair dryer and is used to heat the air inhaled by the hair dryer so as to increase the temperature of the air flow blown out by the hair dryer.

[0020] Optionally, the drying and separation device further includes a dehumidifier, and the exhaust fan is connected to the hair dryer through the dehumidifier and the heater in sequence. The dehumidifier is used to dehumidify the airflow extracted by the exhaust fan to achieve recycling of hot air.

[0021] A lithium battery recycling device includes the above-mentioned drying and separation device, which is used to dry and separate the solid material obtained after the wet treatment of the electrode fragments. The drying and separation device includes a processing tank, a blower, an exhaust fan, a feed pipe, a screen and a discharger. The exhaust fan is connected to the top of the processing tank, the discharger is connected to the bottom of the processing tank, the feed pipe and the blower are both connected to the side wall of the processing tank, the inner diameter of the feed pipe is smaller than the inner diameter of the processing tank, the screen is installed in the processing tank, the feed pipe, the blower and the screen are arranged in sequence from top to bottom, the feed pipe is used to feed the solid material, the exhaust air volume of the exhaust fan is greater than the air outlet air volume of the blower, so as to form a negative pressure in the processing tank, thereby sucking the solid material in the feed pipe into the processing tank, the blower is used to blow air upward along the inner wall of the processing tank to form a spiral wind and dry the solid material, so that the solid material is separated into a current collector and an active material, the density of the current collector is less than the density of the active material, the screen is used to collect the current collector, and the discharger is used to collect the active material that leaks downward from the screen;

[0022] The air volume of the blower satisfies the following relationship to prevent the current collector and active material from moving upward:

[0023]

[0024] v mf1 =k×v mf ;

[0025]

[0026] Where Q is the maximum air volume of the hair dryer, in m 3 / h;v mf1 is the correction of the minimum fluidization velocity, in m / s; D0 is the inner diameter of the treatment tank, in m; k is the correction coefficient, ranging from 0.6 to 1; v mf is the minimum fluidization velocity of the collector, in m / s; ρ is the air density, in kg / m 3 ρ p is the density of the current collector, in kg / m 3 ;D p is the average diameter of the current collector, in m; μ is the air viscosity, in Pa·s.

[0027] The drying and separation device and lithium battery recycling equipment provided by the utility model have the following features

[0028] Beneficial effects:

[0029] The utility model provides a drying and separation device, wherein the exhaust fan is connected to the top of the processing tank, the discharger is connected to the bottom of the processing tank, the feed pipe and the blower are both connected to the side wall of the processing tank, the inner diameter of the feed pipe is smaller than the inner diameter of the processing tank, the screen is installed in the processing tank, the feed pipe, the blower and the screen are arranged in sequence from top to bottom, the feed pipe is used to feed solid materials, the exhaust air volume of the exhaust fan is greater than the air outlet air volume of the blower, so as to form a negative pressure in the processing tank, thereby sucking the solid material in the feed pipe into the processing tank, the blower is used to blow out air flow obliquely upward along the inner wall of the processing tank to form a spiral wind and dry the solid material, so that the solid material is separated into a collector and an active material, the volume of the collector is greater than the volume of the active material, and the density of the collector is less than the density of the active material, the screen is used to collect the collector, and the discharger is used to collect the active material leaking downward from the screen. Compared with the existing technology, the drying and separation device provided by the utility model adopts a feed pipe, a blower and an exhaust fan connected to the processing tank, and a screen installed in the processing tank. Therefore, it can separate the solid material into a collector and an active material while air-drying it, thereby reducing labor costs, improving separation efficiency, improving drying efficiency, improving separation accuracy, and ensuring separation effect.

[0030] The lithium battery recycling equipment provided by the utility model includes a drying and separation device, which can separate the solid material into a current collector and an active material while air-drying the solid material, thereby reducing labor costs, improving separation efficiency, improving drying efficiency, improving separation accuracy, and ensuring separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic structural diagram of a drying and separation device provided in an embodiment of the present utility model;

[0033] Figure 2 A schematic diagram of the structure of a processing tank in a drying and separation device provided in an embodiment of the present utility model;

[0034] Figure 3 A schematic diagram of the structure of the connection between the vibrator and the screen in the drying and separation device provided in an embodiment of the present utility model;

[0035] Figure 4 This is a schematic structural diagram of the feed pipe in the drying and separation device provided in an embodiment of the present utility model.

[0036] Icons: 100-drying and separation device; 110-processing tank; 111-flow cylinder; 112-collection funnel; 113-large end; 114-small end; 115-top wall; 116-peripheral wall; 120-blower; 130-exhaust fan; 140-feed pipe; 141-feed section; 142-blocking section; 143-feed port; 144-baffle; 150-screen; 160-discharger; 170-vibrator; 180-heater; 190-dehumidifier. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0040] In the description of this utility model, it should be noted that the terms "inner," "outer," "upper," "lower," and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0041] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0043] Please refer to Figures 1 to 4 The present invention provides a lithium battery recycling device (not shown) for recycling lithium batteries. It can simultaneously air-dry solid materials and separate them into current collectors and active materials, reducing labor costs, improving separation efficiency, increasing drying efficiency, and increasing separation precision, thereby ensuring effective separation.

[0044] It should be noted that after the electrode fragments are treated by wet immersion, the current collector and the active material are separated, but the active material and the current collector after separation are mixed in the reaction solution and are not easy to sort. Therefore, in the present utility model, it is necessary to filter out the solid material (a mixture of active material and current collector) in the reaction solution and perform pre-dehydration, and then send the solid material into the drying and separation device 100 of the lithium battery recycling equipment, so that the solid material can be separated into the current collector and the active material while being air-dried, and the sorting and drying functions can be completed at the same time, which is convenient and fast. Specifically, the combination of the wet immersion step and the pre-dehydration step is called wet treatment. In actual application, the water content of the solid material sent to the drying and separation device 100 after the wet treatment is completed needs to be controlled within 30% to ensure the air-drying effect of the drying and separation device 100 on the solid material.

[0045] The lithium battery recycling equipment includes a conveying device (not shown) and a drying and separation device 100. The conveying device is connected to the drying and separation device 100 and is used to transport the solid material (with a water content of less than 30%) obtained after the wet treatment of the electrode fragments to the drying and separation device 100. The drying and separation device 100 is used to air-dry the fixed material. During this process, since the active material and the current collector in the solid material are bonded together by liquid tension, the air-drying process can remove the liquid moisture in the solid material, and simultaneously achieve the drying and separation of the active material and the current collector, saving time and labor, reducing labor costs, improving separation efficiency, improving drying efficiency, and improving separation accuracy, ensuring separation effect, preventing the current collector from mixing with the active material and causing a decrease in the purity of the active material, and ensuring its economic value.

[0046] The drying and separation device 100 includes a processing tank 110, a blower 120, an exhaust fan 130, a feed pipe 140, a screen 150 and a discharger 160. The exhaust fan 130 is connected to the top of the processing tank 110 and is used to extract the air in the processing tank 110. The discharger 160 is connected to the bottom of the processing tank 110 and is used to discharge the material after the drying and separation is completed. The feed pipe 140 and the blower 120 are both connected to the side wall of the processing tank 110, and the inner diameter of the feed pipe 140 is smaller than the inner diameter of the processing tank 110. The screen 150 is installed in the processing tank 110. The feed pipe 140, the blower 120 and the screen 150 are arranged in sequence from top to bottom, and the feed pipe 140 is used to feed solid materials. The exhaust air volume of the exhaust fan 130 is greater than the air volume of the blower 120, thereby forming a negative pressure in the processing tank 110, thereby sucking the solid material in the feed pipe 140 into the processing tank 110. The blower 120 is used to blow air upward along the inner wall of the processing tank 110 to form a spiral wind and air-dry the solid material (spiral wind is relatively stable and can effectively reduce air resistance, enhance wind force, and thus improve the air-drying effect), so that the solid material is separated into a current collector and an active material, wherein the volume of the current collector is greater than the volume of the active material and the density of the current collector is less than the density of the active material. The screen 150 is used to collect the current collector, and the discharger 160 is used to collect the active material that leaks downward from the screen 150.

[0047] It is worth noting that the electrode fragments are separated to form current collectors and battery materials, wherein the current collectors are in sheet form, the area of the current collectors is larger than the area of the sieve holes in the sieve 150, the current collectors cannot leave the sieve 150 through the sieve holes, and the sieve 150 can limit the current collectors; the active materials are in dust form, and the active materials can leave the sieve 150 through the sieve holes under the action of gravity.

[0048] Specifically, during the operation of the drying and separation device 100, the hair dryer 120 and the exhaust fan 130 are started, and solid materials are introduced into the feed pipe 140. During this process, since the exhaust volume of the exhaust fan 130 is greater than the air outlet volume of the hair dryer 120, and the exhaust fan 130 is arranged at the top of the processing tank 110, a negative pressure will be formed in the processing tank 110, and the air in the processing tank 110 will flow upward; and since the inner diameter of the feed pipe 140 is much smaller than the inner diameter of the processing tank 110, and the air pressure in the processing tank 110 is equal everywhere, the suction force on the solid material in the feed pipe 140 is much greater than the upward wind force on the solid material in the processing tank 110. Therefore, the pressure difference formed by the simultaneous operation of the exhaust fan 130 and the blower 120 will suck the solid materials in the feed pipe 140 into the processing tank 110, and will not blow the solid materials in the processing tank 110 upward; on the contrary, since the solid materials in the processing tank 110 are affected by gravity, and their gravity is greater than the upward wind force they are subjected to, the solid materials in the processing tank 110 will slowly fall downward, and the upward wind force they are subjected to will slow down their falling speed, prolong the air drying time, and further improve the separation effect and drying effect.

[0049] Furthermore, the air volume of the blower 120 satisfies the following relationship to prevent the current collector and active materials from moving upward under the action of wind:

[0050]

[0051] v mf1 =k×v mf ;

[0052]

[0053] Where Q is the maximum air volume of the hair dryer 120, in m 3 / h;v mf1 is the minimum fluidization velocity correction, in m / s; D0 is the inner diameter of the treatment tank 110, in m; k is the correction coefficient, in the range of 0.6-1; v mf is the minimum fluidization velocity of the collector, in m / s; ρ is the air density, in kg / m 3 ρ p is the density of the current collector, in kg / m 3 ;D p is the average diameter of the current collector, in m; μ is the air viscosity, in Pa·s.

[0054] It is worth noting that since the density of the current collector is less than the density of the active material, it is only necessary to calculate the current collector using the above relationship. In other words, as long as the air volume of the hair dryer 120 is controlled so as not to blow the current collector upward, it can be ensured that the active material will not move upward under the action of wind.

[0055] In addition, the exhaust volume of the exhaust fan 130 is greater than the air outlet volume of the hair dryer 120, and the difference between the exhaust volume of the exhaust fan 130 and the air outlet volume of the hair dryer 120 needs to be determined according to actual conditions to ensure that the feeding speed of the solid material in the feed pipe 140 meets the requirements and prevent the solid material in the processing tank 110 from being sucked out upward.

[0056] The processing tank 110 includes a flow tube 111 and a collection funnel 112. The flow tube 111 is cylindrical, and the collection funnel 112 has a large end 113 and a small end 114. The large end 113 is connected to the flow tube 111, and the small end 114 is connected to the discharger 160. A screen 150 is provided between the flow tube 111 and the collection funnel 112. Active material leaking from the screen 150 enters the collection funnel 112 under the action of gravity and moves from the large end 113 to the small end 114 until it enters the discharger 160. During this process, the collection funnel 112 can guide the active material to improve the collection efficiency of the active material and ensure that the active material can quickly and completely enter the discharger 160. Specifically, the blower 120, the exhaust fan 130 and the feed pipe 140 are all connected to the flow cylinder 111. The inner diameter of the flow cylinder 111 is the same as the inner diameter of the large end 113, that is, D0. The spiral wind blown out by the blower 120 flows upward in a spiral in the flow cylinder 111. The solid material enters the flow cylinder 111 through the feed pipe 140 and is air-dried in the flow cylinder 111 to achieve drying and separation of the collector and active material.

[0057] The flow tube 111 includes a top wall 115 and a peripheral wall 116. One end of the peripheral wall 116 is connected to the top wall 115, and the other end is connected to the large end 113. The exhaust fan 130 is connected to the middle of the top wall 115 to ensure the stability of the exhaust within the flow tube 111 and avoid turbulence. The feed pipe 140 and the blower 120 are arranged at opposite ends of the peripheral wall 116 in the axial direction and are both connected to the peripheral wall 116 to ensure that the spiral air blown by the blower 120 can flow upward along the peripheral wall 116 in a spiral, thereby drying the solid materials entering the flow tube 111 through the feed pipe 140, improving the wind force of the spiral air on the solid materials, and enhancing the drying effect.

[0058] Furthermore, spiral ribs (not shown) are provided within the peripheral wall 116 to guide the airflow from the blower 120 to improve the stability of the spiral wind. Specifically, the spiral ribs are relatively narrow and do not obstruct the current collector or active material. Even if a small amount of current collector or active material lands on the spiral ribs, it will be quickly blown away by the subsequent spiral wind and continue to fall downward.

[0059] The feed pipe 140 includes a feed section 141 and a baffle section 142 connected to each other. The baffle section 142 extends into the processing tank 110. A baffle 144 is provided at one end of the baffle section 142 away from the feed section 141. A feed port 143 is defined at the bottom of the baffle section 142. The baffle 144 is used to collide with the solid material during the feeding process, thereby breaking the solid material and forcing it downward through the feed port 143 into the processing tank 110. Specifically, the end of the feed section 141 away from the blocking section 142 is connected to the conveying device, and the solid material output from the conveying device enters the feed section 141 and is sucked into the processing tank 110 under the action of the negative pressure in the processing tank 110. During this process, due to the large suction force generated by the negative pressure, the solid material moves from the feed section 141 to the blocking section 142 at a faster speed, so that the solid material directly hits the baffle 144, thereby realizing the crushing function of the solid material and improving the air drying efficiency. The crushed solid material falls downward through the feed port 143 under the action of gravity, so as to be dried and separated under the action of spiral wind.

[0060] Preferably, the cross-section of the feed section 141 is circular, and the cross-section of the baffle section 142 is semicircular, to reduce frictional resistance to the solid material feed and improve the feeding efficiency of the solid material. In addition, the baffle 144 is arranged in an arc shape to ensure the reliability of the solid material falling downward from the feed port 143 and prevent the baffle 144 from snaring the solid material.

[0061] Furthermore, a clearance port (not shown) is provided on the side wall of the processing tank 110, and a sealing block (not shown) is detachably installed in the clearance port. The sealing block is used to block the clearance port to ensure the airtightness of the processing tank 110 during the operation of the drying and separation device 100, prevent airflow from overflowing, and ensure the air-drying effect. The clearance port is used to allow the screen 150 to be removed after the sealing block is removed to achieve the discharge of the collector. Specifically, after the drying and separation device 100 completes a drying and separation, the collector remains on the screen 150, and the active material falls through the screen 150 to the discharger 160. At this time, the sealing block is opened and the screen 150 is moved outward and removed to achieve the discharge of the collector, which is convenient for collecting the collector.

[0062] Preferably, the drying and separation device 100 further includes a vibrator 170. Vibrator 170 is connected to the screen 150 and is used to vibrate the screen 150 to shake off any remaining active material on the screen 150, ensuring that the majority of the active material falls into the discharger 160, thereby increasing the collection rate of the active material and improving economic efficiency. Specifically, during the drying and separation process of the drying and separation device 100, or after a drying and separation operation of the drying and separation device 100 is completed, the vibrator 170 can be activated to ensure that the majority of the active material settles into the discharger 160, thereby ensuring the collection rate.

[0063] Preferably, the drying and separation device 100 further includes a heater 180. Heater 180 is connected to blower 120 and is configured to heat the air drawn in by blower 120, thereby increasing the temperature of the airflow blown out by blower 120. This, in turn, raises the internal temperature of processing tank 110, further improving the air-drying effect, separation efficiency, and drying efficiency. Specifically, by controlling the power of heater 180 to ensure that the airflow blown out by blower 120 reaches a preset temperature, the solid material is simultaneously air-dried and dried, further improving the drying and separation effects of the current collector and active material.

[0064] Furthermore, the preset temperature ranges from 60 degrees Celsius to 100 degrees Celsius. A reasonable preset temperature can maximize the drying efficiency and separation efficiency while avoiding damage to the current collector and active materials.

[0065] Preferably, the drying and separation device 100 also includes a dehumidifier 190. The exhaust fan 130 is connected to the hair dryer 120 through the dehumidifier 190 and the heater 180 in sequence. The dehumidifier 190 is used to dehumidify the airflow extracted by the exhaust fan 130 to achieve the recycling of hot air. Specifically, during the operation of the drying and separation device 100, the airflow blown by the hair dryer 120 will take away the moisture in the solid material during the process of air-drying the solid material, so as to increase the humidity of the airflow. However, at this time, a certain amount of heat is still retained in the airflow. Therefore, the exhaust fan 130 is used to extract the airflow with increased humidity to the dehumidifier 190, and the dehumidifier 190 is used to reduce the humidity of the airflow, so as to achieve the recycling of the airflow while ensuring the drying effect, and reuse the residual heat in the airflow, thereby effectively reducing the energy consumption of the system.

[0066] The drying and separation device 100 provided by the embodiment of the present invention comprises an exhaust fan 130 connected to the top of the processing tank 110, a discharger 160 connected to the bottom of the processing tank 110, a feed pipe 140 and a blower 120 both connected to the side wall of the processing tank 110, the inner diameter of the feed pipe 140 is smaller than the inner diameter of the processing tank 110, a screen 150 is installed in the processing tank 110, the feed pipe 140, the blower 120 and the screen 150 are arranged in sequence from top to bottom, the feed pipe 140 is used to feed solid materials, the exhaust air volume of the exhaust fan 130 is greater than The blower 120's airflow creates a negative pressure within the processing tank 110, thereby drawing the solid material within the feed pipe 140 into the processing tank 110. The blower 120 is configured to blow air upward at an angle along the inner wall of the processing tank 110, creating a spiral wind that dries the solid material and separates it into a current collector and active material. The current collector has a larger volume than the active material, and a smaller density than the active material. The screen 150 collects the current collector, and the discharger 160 collects the active material that leaks downward from the screen 150. Compared to the prior art, the drying and separation device 100 provided by the present invention utilizes a feed pipe 140 connected to the processing tank 110, a blower 120, an exhaust fan 130, and a screen 150 installed within the processing tank 110. This allows the solid material to be dried and separated into the current collector and active material simultaneously, reducing labor costs, improving separation efficiency, drying efficiency, separation precision, and ensuring separation effectiveness. This results in high recycling efficiency and excellent recycling results for lithium battery recycling equipment.

[0067] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A drying and separation device, characterized in that: The invention relates to a drying and separation device for drying and separating solid materials obtained after wet treatment of electrode fragments. The drying and separation device comprises a treatment tank (110), a blower (120), an exhaust fan (130), a feed pipe (140), a screen (150) and a discharger (160). The exhaust fan (130) is connected to the top of the treatment tank (110), the discharger (160) is connected to the bottom of the treatment tank (110), the feed pipe (140) and the blower (120) are both connected to the side wall of the treatment tank (110), the inner diameter of the feed pipe (140) is smaller than the inner diameter of the treatment tank (110), the screen (150) is installed in the treatment tank (110), the feed pipe (140), the blower (120) and the screen (150) are connected to the bottom of the treatment tank (110), and the discharger (160) is connected to the bottom of the treatment tank (110). 50) are sequentially arranged from top to bottom, the feed pipe (140) is used to feed solid materials, the exhaust air volume of the exhaust fan (130) is greater than the air outlet air volume of the blower (120), so as to form a negative pressure in the processing tank (110), thereby sucking the solid materials in the feed pipe (140) into the processing tank (110), the blower (120) is used to blow air upward along the inner wall of the processing tank (110) to form a spiral wind and air-dry the solid materials, so that the solid materials are separated into a current collector and an active material, the volume of the current collector is greater than the volume of the active material, and the density of the current collector is less than the density of the active material, the screen (150) is used to collect the current collector, and the discharger (160) is used to collect the active material leaking downward from the screen (150); The air volume of the blower (120) satisfies the following relationship to prevent the current collector and active material from moving upward: in mf1 =k×v mf ; Wherein, Q is the maximum air volume of the hair dryer (120), in m 3 / h;v mf1 is the minimum fluidization velocity correction, in m / s; D0 is the inner diameter of the treatment tank (110), in m; k is the correction coefficient, in the range of 0.6-1; v mf is the minimum fluidization velocity of the collector, in m / s; ρ is the air density, in kg / m 3 ρ p is the density of the current collector, in kg / m 3 ;D p is the average diameter of the current collector, in m; μ is the air viscosity, in Pa·s.

2. The drying and separation device according to claim 1, characterized in that: The processing tank (110) includes a flow tube (111) and a collection funnel (112). The collection funnel (112) is provided with a large end (113) and a small end (114) opposite to each other. The large end (113) is connected to the flow tube (111), and the small end (114) is connected to the discharger (160). The screen (150) is provided between the flow tube (111) and the collection funnel (112). The blower (120), the exhaust fan (130) and the feed pipe (140) are all connected to the flow tube (111).

3. The drying and separation device according to claim 2, characterized in that: The flow tube (111) includes a top wall (115) and a peripheral wall (116), one end of the peripheral wall (116) is connected to the top wall (115), and the other end is connected to the large end (113), the exhaust fan (130) is connected to the middle part of the top wall (115), the feed pipe (140) and the blower (120) are relatively arranged at the two ends of the peripheral wall (116) in its axial direction, and are both connected to the peripheral wall (116).

4. The drying and separation device according to claim 1, characterized in that: The feed pipe (140) includes a feed section (141) and a blocking section (142) connected to each other. The blocking section (142) extends into the processing tank (110). A baffle (144) is provided at one end of the blocking section (142) away from the feed section (141). A feed port (143) is provided at the bottom of the blocking section (142). The baffle (144) is used to collide with the solid material during the feeding process to crush the solid material and allow it to flow downward from the feed port (143) into the processing tank (110).

5. The drying and separation device according to claim 4, characterized in that: The cross section of the material blocking section (142) is semicircular; and / or the baffle (144) is arc-shaped.

6. The drying and separation device according to claim 1, characterized in that: The side wall of the processing tank (110) is provided with a clearance opening, in which a sealing block is detachably installed. The clearance opening is used to allow the screen (150) to be taken out after the sealing block is removed, so as to realize the discharge of the current collector.

7. The drying and separation device according to claim 1, characterized in that: The drying and separating device further comprises a vibrator (170), wherein the vibrator (170) is connected to the screen (150), and the vibrator (170) is used to drive the screen (150) to vibrate so as to shake off the active material remaining on the screen (150).

8. The drying and separation device according to claim 1, characterized in that: The drying and separation device further comprises a heater (180), the heater (180) being connected to the hair dryer (120), and the heater (180) being used to heat the air inhaled by the hair dryer (120) so as to increase the temperature of the air flow blown out by the hair dryer (120).

9. The drying and separation device according to claim 8, characterized in that: The drying and separation device further comprises a dehumidifier (190), the exhaust fan (130) is connected to the hair dryer (120) via the dehumidifier (190) and the heater (180) in sequence, and the dehumidifier (190) is used to dehumidify the airflow extracted by the exhaust fan (130) to achieve the recycling of hot air.

10. A lithium battery recycling device, characterized in that: The drying and separation device comprises the drying and separation device according to any one of claims 1 to 9.

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