A disc dryer

Abstract

The present application relates to a disc dryer, and relates to the technical field of battery material drying. The disc dryer comprises: a dryer body; a heat recovery pipe, which is arranged in the dryer body; an induced draft fan, which is arranged at the free end of the heat recovery pipe; a dust collector, which is arranged in the heat recovery pipe and is located between the induced draft fan and the dryer body; a heat recovery mechanism, which is arranged in the heat recovery pipe and is located between the dust collector and the dryer body, and is used to recycle the heat in the hot air in the heat recovery pipe, and to clean the powder adhered to the inner wall of the heat recovery pipe. The present application has the effect of improving the full utilization of the hot air when the heat exchange between the inside of the dryer and the outside is carried out, and improving the utilization rate of resources.

Description

Technical Field

[0001] The present application relates to the technical field of battery material drying, and in particular to a disc dryer. Background Art

[0002] The raw materials of batteries include lithium carbonate, lithium hydroxide, ternary precursors and other raw materials. The moisture content of the raw materials will affect the battery performance such as capacity, cycle life, safety, etc. Therefore, drying the battery raw materials is a key step in the battery manufacturing process, which aims to improve the performance, safety and reliability of the battery.

[0003] At present, when drying battery raw materials, a disc dryer is required for drying. The disc dryer usually includes multiple layers of drying discs arranged at intervals from top to bottom, a shell covering the outside of multiple drying discs, a scraper and a heating system arranged on the drying discs, an induced draft fan, a dust collector, etc. When drying battery raw materials, multiple drying discs are designed with large and small disc structures from top to bottom. The material starts from the top of the dryer. As the drying disc rotates slowly, the material is scraped from the upper layer to the lower layer by the scraper. In this process, the heating system heats the disc surface, the material is fully in contact with the disc surface, and the rake-type stirring structure is used to accelerate the dispersion and uniform drying of the material. At the same time, the induced draft fan discharges the hot air generated by the drying of the material out of the dryer to accelerate the evaporation of water in the material; however, in the process of heat exchange between the induced draft fan and the external environment, a large amount of heat is discharged to the external environment, resulting in a large waste of heat resources. Summary of the invention

[0004] In order to fully utilize the hot air when the inside of the dryer is heat exchanged with the outside and improve the utilization rate of resources, the present application provides a disc dryer.

[0005] The present application provides a disc dryer, which adopts the following technical solution:

[0006] A disc dryer, comprising:

[0007] Dryer body;

[0008] A heat recovery pipeline is arranged on the dryer body;

[0009] An induced draft fan is arranged at the free end of the heat recovery duct;

[0010] A dust collector is arranged in the heat recovery duct and is located between the induced draft fan and the dryer body;

[0011] The heat recovery mechanism is arranged in the heat recovery pipe and is located between the dust collector and the dryer body. It is used to recover the heat in the hot air in the heat recovery pipe and to clean the powder adhered to the inner wall of the heat recovery pipe.

[0012] By adopting the above technical scheme, when the battery raw materials are dried by the disc dryer, the materials are first introduced from the top of the dryer body, then the stirring assembly rotates, and the heating system heats the drying disc, so that the materials are fully in contact with the drying disc and move downward layer by layer between the multiple layers of drying discs to accelerate the evaporation of water. Then the induced draft fan draws the hot air out of the dryer body and discharges it to the outside through the heat recovery pipe and the dust collector in turn. When the hot air flows through the heat recovery pipe, the heat recovery mechanism recovers the heat of the hot air in the heat recovery pipe and uses it for other purposes, thereby improving the utilization rate of heat resources. During the recovery process, the temperature of the hot air will drop sharply, and at the same time, some powder will adhere to the inner wall of the heat recovery pipe, affecting the heat conduction of the inner wall of the heat recovery pipe. The staff can regularly clean the powder adhered to the inner wall of the pipe through the heat recovery mechanism, thereby improving the heat conduction efficiency of the inner wall of the heat recovery pipe, further improving the utilization rate of heat resources, reducing energy waste, and improving drying efficiency.

[0013] Optionally, the heat recovery mechanism includes:

[0014] A heat exchange pipe, detachably connected to a heat recovery pipe;

[0015] Two support frames are provided, and the two support frames are fixedly arranged on the inner wall of the heat exchange pipe at intervals;

[0016] The packing column is fixed between the two support frames, and the heat exchange pipe is sleeved on the outside of the packing column and spaced apart from the packing column;

[0017] A heat recovery component is arranged in the heat exchange pipe and is used to cool the hot air flowing through the heat exchange pipe and recover the heat for utilization;

[0018] The cleaning component is arranged between the two support frames and is used for cleaning and collecting the powder adhered to the inner wall of the heat exchange pipe.

[0019] By adopting the above technical scheme, when hot air flows through the heat exchange pipe, the heat recovery component recycles the heat in the hot air flowing through the pipe. Powder particles are mixed in the hot air. When the hot air is cooled, the powder particles are easy to adhere to the inner wall of the heat exchange pipe. When a lot of powder adheres to the inner wall of the heat exchange pipe, the cleaning component cleans and collects the powder adhered to the inner wall of the pipe, thereby preventing the heat exchange pipe from being blocked on the one hand, and allowing the hot air to fully contact the inner wall of the heat exchange pipe on the other hand, thereby improving the heat exchange recovery efficiency and recovery rate. The heat exchange pipe and the heat recovery pipe are detachably connected to facilitate the staff to inspect or maintain the heat recovery component and the cleaning component.

[0020] Optionally, the heat recovery component includes:

[0021] A first cooling chamber is arranged on the inner wall of the heat exchange pipe;

[0022] A first water inlet pipe is arranged outside the heat exchange pipe, and the first cooling chamber is connected to the first water inlet pipe, and the first water inlet pipe is connected to external cooling water;

[0023] The first water outlet pipe is arranged outside the heat exchange pipe, and the first cooling chamber is communicated with the first water outlet pipe.

[0024] By adopting the above technical solution, the first water inlet pipe introduces external cooling water, the cooling water enters the first cooling chamber and exchanges heat with the hot air in the heat exchange pipe, the heat in the hot air is transferred to the cooling water through heat exchange, the cooling water temperature increases, and the hot air temperature decreases, and the heated cooling water is discharged through the first water outlet pipe to be used as other heat sources.

[0025] Optionally, the heat recovery component further includes:

[0026] A second cooling chamber is disposed in the filling column;

[0027] A second water inlet pipe is provided between the heat exchange pipe and the filling column, and the second cooling chamber is communicated with the second water inlet pipe, and the second water inlet pipe is connected to external cooling water;

[0028] The second water outlet pipe is arranged between the heat exchange pipe and the filling column, and the second cooling chamber is communicated with the second water outlet pipe.

[0029] By adopting the above technical scheme, the second water inlet pipe introduces external cooling water, the cooling water enters the second cooling chamber and exchanges heat with the hot air in the heat exchange pipe, the heat in the hot air is transferred to the cooling water through heat exchange, the cooling water temperature increases, the hot air temperature decreases, and the heated cooling water is discharged through the second water outlet pipe to be used as other heat sources; wherein the heat exchange pipe is sleeved on the outside of the filling column and is spaced apart from the filling column, that is, when the hot air flows through the heat exchange pipe, it can only pass through the spaced gap between the heat exchange pipe and the filling column, so that the hot air contacts the inner wall of the heat exchange pipe and the outer wall of the filling column respectively, thereby increasing the contact area of ​​the hot air, accelerating the heat conduction, and improving the heat conduction recovery efficiency and recovery rate.

[0030] Optionally, the cleaning component includes:

[0031] A reciprocating screw rod is rotatably connected between two support frames;

[0032] A scraper is slidably connected in the heat exchange pipe, and the scraper is threadedly connected to the reciprocating screw rod, the scraper abuts against the inner wall of the heat exchange pipe and the outer wall of the filling column, and a plurality of air holes are also opened on the scraper;

[0033] A cleaning pipe is arranged outside the heat exchange pipe, and two cleaning pipes are arranged, and the two cleaning pipes are respectively located on the sides of the two support frames close to each other;

[0034] The recovery chamber is connected to two cleaning pipes at the same time;

[0035] A driving component is disposed between the reciprocating screw and the heat exchange pipe and is used to drive the reciprocating screw to rotate;

[0036] The opening and closing component is arranged between the cleaning pipeline and the recovery bin, and is used to control the connection or disconnection between the cleaning pipeline and the recovery bin.

[0037] By adopting the above technical solution, when the driving component drives the reciprocating screw to rotate, the scraper connected to the reciprocating screw thread will reciprocate on the inner wall of the heat exchange pipe to scrape off the powder adhered to the inner wall of the heat exchange pipe. Then the cleaned powder will enter the cleaning pipe, and then the connection state will be controlled by the opening and closing component to allow the powder to enter the recovery bin for collection; the opening and closing component can flexibly control the connection or disconnection between the cleaning pipe and the recovery bin, thereby blocking the hot air from entering the recovery bin from the cleaning pipe, reducing the waste of heat resources.

[0038] Optionally, the driving component includes:

[0039] A rotating shaft rotatably connected to the heat exchange pipe;

[0040] A bevel gear set is arranged between the rotating shaft and the reciprocating screw;

[0041] The driving motor is arranged at one end of the rotating shaft.

[0042] By adopting the above technical solution, when the reciprocating screw is driven to rotate by the driving component, the driving motor is first started, and then the driving motor drives the rotating shaft to rotate. The rotating shaft is driven by the bevel gear set to drive the reciprocating screw to rotate.

[0043] Optionally, the opening and closing component includes:

[0044] A rotating shaft, rotatably connected to the cleaning pipe;

[0045] A baffle, fixed on the rotating shaft;

[0046] A worm gear is fixedly sleeved on the rotating shaft;

[0047] A worm, rotatably connected to the cleaning pipe, the worm wheel and the worm being meshed with each other;

[0048] The power motor is arranged at one end of the worm.

[0049] By adopting the above technical solution, the powder scraped off by the scraper will enter the cleaning pipe for temporary storage. The staff can start the power motor regularly. The power motor can accurately control the rotation of the baffle through the transmission of the worm and the worm gear, so as to realize the connection between the cleaning pipe and the recovery bin, so that the powder falls into the recovery bin for collection; the worm gear has self-locking property, so that the baffle can be kept in a closed state for a long time in the absence of power input, thereby saving energy; and the baffle keeps the cleaning pipe and the recovery bin in a disconnected state for a long time, so that the hot air in the heat recovery pipe is not easy to enter the recovery bin from the cleaning pipe, thereby further improving the heat recovery efficiency.

[0050] Optionally, the opening and closing component further includes:

[0051] A weight sensor is connected to the baffle plate, and is used to detect the weight of the powder accumulated above the baffle plate and send out a weight detection signal;

[0052] The controller is connected to the weight sensor and the power motor, and is used to receive the weight detection signal to know the weight of the powder accumulated above the baffle. When the weight of the powder accumulated above the baffle is greater than the preset weight, the controller outputs a control signal to the power motor so that the power motor drives the baffle to open to achieve communication between the cleaning pipeline and the recovery bin.

[0053] By adopting the above technical solution, the weight sensor can detect the weight of the accumulated powder above the baffle in real time, and convert the weight information into an electrical signal and send it to the controller. When it is detected that the weight exceeds the preset value, the controller will automatically output a control signal to the power motor to realize automatic connection between the cleaning pipeline and the recovery bin without human intervention. Among them, by automatically controlling the opening of the baffle, it can be ensured that the powder is cleaned immediately when the weight reaches the preset value, reducing the uncertainty of manual operation and avoiding cleaning delays caused by untimely manual judgment, thereby improving cleaning efficiency.

[0054] Optionally, the scraper is configured with pointed ends at the joints with the heat exchange pipe and the filling column.

[0055] By adopting the above technical solution, the tip setting makes the scraper encounter less resistance during movement, which helps to reduce the energy consumption of the scraper during the cleaning process, and more conveniently and efficiently scrapes away the powder attached to the inner wall of the heat exchange pipe and the surface of the filling column, thereby improving the efficiency and service life of the cleaning component.

[0056] Optionally, a filter screen is further provided at the inlet of the heat recovery pipeline, and a vibration motor is provided on the filter screen.

[0057] By adopting the above technical solution, the filter can effectively intercept larger materials entering the heat recovery pipeline, and perform preliminary coarse screening and filtration on the powder mixed in the hot air entering the heat recovery pipeline, thereby reducing the cleaning burden of the cleaning component and improving the heat recovery efficiency of the heat recovery component; and the vibration motor can regularly or continuously vibrate and clean the filter to prevent the particles accumulated on the filter from clogging the mesh holes, thereby ensuring the smooth flow of the filter.

[0058] In summary, the present application includes at least one of the following beneficial technical effects:

[0059] 1. When hot air flows through the heat recovery pipe, the heat recovery mechanism recovers the heat from the hot air in the heat recovery pipe and uses it for other purposes, thereby improving the utilization rate of heat resources; during the recovery process, the temperature of the hot air will drop sharply, and some powder will adhere to the inner wall of the heat recovery pipe, affecting the heat conduction of the inner wall of the heat recovery pipe. The staff can regularly clean the powder adhered to the inner wall of the pipe through the heat recovery mechanism, thereby improving the heat conduction efficiency of the inner wall of the heat recovery pipe, further improving the utilization rate of heat resources, reducing energy waste, and improving drying efficiency;

[0060] 2. When hot air flows through the heat exchange pipe, the heat recovery component recycles the heat in the hot air flowing through the pipe. The hot air is mixed with powder particles. When the hot air is cooled, the powder particles tend to adhere to the inner wall of the heat exchange pipe. When a lot of powder adheres to the inner wall of the heat exchange pipe, the cleaning component cleans and collects the powder adhered to the inner wall of the pipe, thereby preventing the heat exchange pipe from being blocked on the one hand and allowing the hot air to fully contact the inner wall of the heat exchange pipe on the other hand, thereby improving the heat exchange recovery efficiency and recovery rate. The heat exchange pipe and the heat recovery pipe are detachably connected to facilitate the staff to inspect or maintain the heat recovery component and the cleaning component;

[0061] 3. The heat exchange pipe in the heat recovery component is sleeved on the outside of the filling column and is spaced from the filling column, that is, when hot air flows through the heat exchange pipe, it can only pass through the gap between the heat exchange pipe and the filling column, so that the hot air contacts the inner wall of the heat exchange pipe and the outer wall of the filling column respectively, thereby increasing the contact area of ​​the hot air, accelerating heat conduction, and improving the heat conduction recovery efficiency and recovery rate;

[0062] 4. The opening and closing components can flexibly control the connection or disconnection between the cleaning pipe and the recovery bin, thereby blocking the hot air from entering the recovery bin from the cleaning pipe, reducing the waste of heat resources, and the opening and closing components are self-locking, which can keep the baffle in a closed state for a long time without power input, saving energy; and the baffle keeps the cleaning pipe and the recovery bin in a disconnected state for a long time, making it difficult for the hot air in the heat recovery pipe to enter the recovery bin from the cleaning pipe, thereby further improving the heat recovery efficiency;

[0063] 5. The weight sensor can detect the weight of the accumulated powder above the baffle in real time, and convert the weight information into an electrical signal and send it to the controller. When the weight is detected to exceed the preset value, the controller will automatically output a control signal to the power motor to achieve automatic connection between the cleaning pipeline and the recovery bin without manual intervention. The opening of the baffle can be automatically controlled to ensure that the powder is cleaned immediately when the weight reaches the preset value, reducing the uncertainty of manual operation and avoiding cleaning delays caused by untimely manual judgment, thereby improving cleaning efficiency.

[0064] 6. The filter can effectively intercept larger materials entering the heat recovery pipeline, and perform preliminary coarse screening and filtration on the powder mixed in the hot air entering the heat recovery pipeline, thereby reducing the cleaning burden of the cleaning components and improving the heat recovery efficiency of the heat recovery components; and the vibration motor can regularly or continuously vibrate and clean the filter to prevent the particles accumulated on the filter from clogging the mesh and ensure the smooth flow of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 It is a schematic diagram of the structure of the disc dryer in this application;

[0066] Figure 2 is a partial cross-sectional schematic diagram showing a disc dryer;

[0067] Figure 3 is a partial cross-sectional schematic diagram showing a heat recovery mechanism;

[0068] Figure 4 Yes means Figure 3 A schematic diagram of the partially enlarged structure of part A;

[0069] Figure 5 is a partial cross-sectional schematic diagram showing a heat recovery component;

[0070] Figure 6 is a partial cross-sectional schematic diagram showing a cleaning assembly;

[0071] Figure 7 Yes means Figure 6 Schematic diagram of the local enlarged structure of part B.

[0072] Description of reference numerals: 1. dryer body; 2. heat recovery pipe; 3. induced draft fan; 4. dust collector; 5. heat recovery mechanism; 51. flange; 52. heat exchange pipe; 53. support frame; 54. filling column; 541. sliding groove; 55. heat recovery assembly; 551. first cooling chamber; 552. first water inlet pipe; 553. first water outlet pipe; 554. second cooling chamber; 555. second water inlet pipe; 556. second water outlet pipe; 56 , cleaning component; 561, reciprocating screw; 562, scraper; 5621, air vent; 5622, tip; 563, cleaning pipe; 564, recovery bin; 565, driving component; 5651, rotating shaft; 5652, bevel gear set; 5653, driving motor; 566, opening and closing component; 5661, rotating shaft; 5662, baffle; 5663, worm wheel; 5664, worm; 5665, power motor; 6, filter; 7, vibration motor. DETAILED DESCRIPTION

[0073] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0074] The present application embodiment discloses a disc dryer. Figure 1 and Figure 2 The disc dryer includes a dryer body 1, on which a heat recovery pipe 2 is provided, and a draft fan 3 is provided at the free end of the heat recovery pipe 2. A dust collector 4 is also provided on the heat recovery pipe 2. Exemplarily, the dust collector 4 can be a bag dust collector 4, or a multi-stage dust collector 4, etc. The dust collector 4 is located between the draft fan 3 and the dryer body 1. A heat recovery mechanism 5 is provided on the heat recovery pipe 2, and the heat recovery mechanism 5 is located between the dust collector 4 and the dryer body 1, and is used to recycle the heat in the hot air in the heat recovery pipe 2, and to clean the powder adhered to the inner wall of the heat recovery pipe 2. A filter screen 6 is also provided at the inlet of the heat recovery pipe 2, and a vibration motor 7 is provided on the filter screen 6.

[0075] When the battery raw materials are dried by the disc dryer, the materials are firstly introduced from the top of the dryer body 1, then the stirring device rotates, the heating system heats the drying disc, the materials are fully in contact with the drying disc, and move downward layer by layer between the multiple layers of drying discs to accelerate the evaporation of water, then the induced draft fan 3 draws the hot air out of the dryer body 1, then the filter screen 6 intercepts the larger materials in the heat recovery pipe 2, so that the powder mixed in the hot air entering the heat recovery pipe 2 is initially coarsely screened and intercepted, and the vibration motor 7 can regularly or continuously vibrate and clean the filter screen 6 to prevent the particles accumulated on the filter screen 6 from clogging the mesh, ensuring the smooth flow of the filter screen 6, and then the hot air is discharged to the outside through the heat recovery pipe 2 and the dust collector 4 in turn.

[0076] When the hot air flows through the heat recovery pipe 2, the heat recovery mechanism 5 recovers the heat from the hot air in the heat recovery pipe 2 and uses it for other purposes, thereby improving the utilization rate of heat resources; during the recovery process, the temperature of the hot air will drop sharply, and at the same time, some powder will adhere to the inner wall of the heat recovery pipe 2, affecting the heat conduction of the inner wall of the heat recovery pipe 2. The staff can regularly clean the powder adhered to the inner wall of the pipe 563 through the heat recovery mechanism 5, thereby improving the heat conduction efficiency of the inner wall of the heat recovery pipe 2.

[0077] In some embodiments, reference Figure 3 and Figure 4 The heat recovery mechanism 5 includes a heat exchange pipe 52 detachably connected to the heat recovery pipe 2 through a flange 51, two support frames 53 are fixedly arranged on the inner wall of the heat exchange pipe 52, a filling column 54 is fixedly arranged between the two support frames 53, and the heat exchange pipe 52 is sleeved on the outside of the filling column 54 and is spaced apart from the filling column 54. A heat recovery component 55 is arranged on the heat exchange pipe 52, and the heat recovery component 55 is used to cool the hot air flowing through the heat exchange pipe 52 and recycle the heat. A cleaning component 56 is arranged between the two support frames 53, and the cleaning component 56 is used to clean and collect the powder adhered to the inner wall of the heat exchange pipe 52; wherein the heat exchange pipe 52 is detachably connected to the heat recovery pipe 2, which is convenient for the staff to inspect or maintain the heat recovery component 55 and the cleaning component 56.

[0078] When hot air flows through the heat exchange pipe 52, the heat recovery component 55 recycles the heat in the hot air flowing through the pipe. Powder particles are mixed in the hot air. When the hot air is cooled, the powder particles are easy to adhere to the inner wall of the heat exchange pipe 52. When a lot of powder adheres to the inner wall of the heat exchange pipe 52, the cleaning component 56 cleans and collects the powder adhered to the inner wall of the pipe, thereby preventing the heat exchange pipe 52 from being blocked on the one hand, and allowing the hot air to fully contact the inner wall of the heat exchange pipe 52 on the other hand, thereby improving the heat exchange recovery efficiency and recovery rate.

[0079] In some embodiments, reference Figure 5 and Figure 6 The heat recovery component 55 includes a first cooling chamber 551 disposed on the inner wall of the heat exchange pipe 52, and a first water inlet pipe 552 and a first water outlet pipe 553 are disposed outside the heat exchange pipe 52. The first cooling chamber 551 is connected to both the first water inlet pipe 552 and the first water outlet pipe 553, and the first water inlet pipe 552 is connected to external cooling water. A second cooling chamber 554 is disposed in the filling column 54, and a second water inlet pipe 555 and a second water outlet pipe 556 are disposed between the heat exchange pipe 52 and the filling column 54. The second cooling chamber 554 is connected to both the second water inlet pipe 555 and the second water outlet pipe 556, and the second water inlet pipe 555 is connected to external cooling water.

[0080] After the first water inlet pipe 552 and the second water inlet pipe 555 introduce external cooling water, the cooling water enters the first cooling chamber 551 and the second cooling chamber 554 to exchange heat with the hot air in the heat exchange pipe 52. The heat in the hot air is transferred to the cooling water through heat exchange, the cooling water temperature increases, and the hot air temperature decreases. The heated cooling water is discharged through the first water outlet pipe 553 and the second water outlet pipe 556 and used as other heat sources. The heat exchange pipe 52 is sleeved on the outside of the filling column 54 and is spaced from the filling column 54, that is, when the hot air flows through the heat exchange pipe 52, it can only pass through the gap between the heat exchange pipe 52 and the filling column 54, so that the hot air contacts the inner wall of the heat exchange pipe 52 and the outer wall of the filling column 54 respectively, thereby increasing the contact area of ​​the hot air, accelerating the heat conduction, and improving the heat conduction recovery efficiency and recovery rate.

[0081] In some embodiments, reference Figure 5 and Figure 6 The cleaning assembly 56 includes a reciprocating screw rod 561 rotatably connected between the two support frames 53; a scraper 562 is arranged in the heat exchange pipe 52, a sliding groove 541 is provided on the filling block, and the scraper 562 can slide in the sliding groove 541, and the scraper 562 is threadedly connected to the reciprocating screw rod 561, and a plurality of air holes 5621 are also provided on the scraper 562. The scraper 562 abuts against the inner wall of the heat exchange pipe 52 and the outer wall of the filling column 54, and the abutment of the scraper 562 with the heat exchange pipe 52 and the filling column 54 is set at a pointed end 5622. Two cleaning pipes 563 are arranged outside the heat exchange pipe 52, and the two cleaning pipes 563 are respectively located on the side of the two support frames 53 close to each other. A recovery bin 564 is fixedly arranged on one side of the dryer body 1, and the recovery bin 564 is connected to the two cleaning pipes 563 at the same time. A driving component 565 is provided between the reciprocating screw 561 and the heat exchange pipe 52, and the driving component 565 is used to drive the reciprocating screw to rotate. An opening and closing component 566 is provided between the cleaning pipe 563 and the recovery bin 564, and the opening and closing component 566 is used to control the connection or disconnection between the cleaning pipe 563 and the recovery bin 564, thereby blocking the hot air from entering the recovery bin 564 from the cleaning pipe 563, reducing the waste of heat resources.

[0082] When the driving component 565 drives the reciprocating screw to rotate, the scraper 562 threadedly connected to the reciprocating screw will reciprocate on the inner wall of the heat exchange pipe 52 to scrape off the powder adhering to the inner wall of the heat exchange pipe 52. The cleaned powder will then enter the cleaning pipe 563, and the connection state will be controlled by the opening and closing component 566, so that the powder will enter the recovery bin 564 for collection.

[0083] For example, refer to Figure 6 and Figure 7The driving component 565 includes a rotating shaft 5651 rotatably connected to the heat exchange pipe 52, a bevel gear set 5652 is arranged between the rotating shaft 5651 and the reciprocating screw 561, one bevel gear in the bevel gear set 5652 is fixedly sleeved on the rotating shaft 5651, and the other bevel gear is fixedly sleeved on the reciprocating screw. A driving motor 5653 is also arranged at one end of the rotating shaft 5651.

[0084] When the reciprocating screw rod 561 is driven to rotate by the driving component 565 , the driving motor 5653 is started first, and then the driving motor 5653 drives the rotating shaft 5651 to rotate. The rotating shaft 5651 is driven by the bevel gear set 5652 to drive the reciprocating screw rod 561 to rotate.

[0085] In some embodiments, reference Figure 6 The opening and closing component 566 includes a rotating shaft 5661 rotatably connected to the cleaning pipe 563, a baffle 5662 is fixedly sleeved at one end of the rotating shaft 5661, and a worm gear 5663 is fixedly sleeved at the other end; a worm 5664 is rotatably connected to the cleaning pipe 563, and the worm gear 5663 and the worm 5664 are meshed with each other. A power motor 5665 is also provided at one end of the worm 5664. The opening and closing component 566 also includes a weight sensor and a controller, and the weight sensor is connected to the baffle 5662, which is used to detect the weight of the powder accumulated above the baffle 5662 and send a weight detection signal. The controller is connected to the weight sensor and the power motor 5665, which is used to receive the weight detection signal to know the weight of the powder accumulated above the baffle 5662. When the weight of the powder accumulated above the baffle 5662 is greater than the preset weight, a control signal is output to the power motor 5665, so that the power motor 5665 drives the baffle 5662 to open to achieve the connection between the cleaning pipe 563 and the recovery bin 564.

[0086] The powder scraped off by the scraper 562 will enter the cleaning pipe 563 for temporary storage. The weight sensor can detect the weight of the accumulated powder above the baffle 5662 in real time, and convert the weight information into an electrical signal and send it to the controller. When the weight is detected to exceed the preset value, the controller will automatically output a control signal to the power motor 5665. The power motor 5665 can accurately control the rotation of the baffle 5662 through the transmission of the worm 5664 and the worm wheel 5663, thereby realizing the connection between the cleaning pipe 563 and the recovery bin 564, so that the powder falls into the recovery bin 564 for collection. When the powder falls into the recovery bin 564, the power motor 5665 drives the baffle 5662 to reset, thereby realizing the automatic connection between the cleaning pipe 563 and the recovery bin 564 without manual intervention. The worm wheel 5663 and the worm 5664 are self-locking, which can keep the baffle 5662 in a closed state for a long time without power input, saving energy.

[0087] The implementation principle of a disc dryer in the embodiment of the present application is as follows: when the battery raw materials are dried by the disc dryer, the material is first introduced from the top of the dryer body 1, then the stirring device rotates, and the heating system heats the drying disc, so that the material is fully in contact with the drying disc and moves downward layer by layer between the multiple layers of drying discs to accelerate the evaporation of water, and then the induced draft fan 3 extracts the hot air from the dryer body 1, and discharges it to the outside through the heat recovery pipe 2 and the dust collector 4 in turn. When the hot air flows through the heat recovery pipe 2, the heat recovery mechanism 5 recovers the heat of the hot air in the heat recovery pipe 2 and uses it for other purposes, thereby improving the utilization rate of heat resources; during the recovery process, the temperature of the hot air will drop sharply, and at the same time, some powder will adhere to the inner wall of the heat recovery pipe 2, affecting the heat conduction of the inner wall of the heat recovery pipe 2. The staff can regularly clean the powder adhered to the inner wall of the pipe 563 through the heat recovery mechanism 5, thereby improving the heat conduction efficiency of the inner wall of the heat recovery pipe 2, further improving the utilization rate of heat resources, reducing energy waste, and improving drying efficiency.

[0088] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A disc dryer, characterized in that: include: Dryer body (1); A heat recovery pipeline (2) is arranged on the dryer body (1); An induced draft fan (3) is arranged at the free end of the heat recovery pipe (2); A dust collector (4) is arranged in the heat recovery pipeline (2) and is located between the induced draft fan (3) and the dryer body (1); A heat recovery mechanism (5) is arranged in the heat recovery pipe (2) and is located between the dust collector (4) and the dryer body (1), and is used to recover and utilize the heat in the hot air in the heat recovery pipe (2) and to clean the powder adhered to the inner wall of the heat recovery pipe (2); The heat recovery mechanism (5) comprises: A heat exchange pipe (52) detachably connected to the heat recovery pipe (2); Two support frames (53) are provided, and the two support frames (53) are fixedly arranged on the inner wall of the heat exchange pipe (52) at intervals; The filling column (54) is fixedly arranged between the two support frames (53), and the heat exchange pipe (52) is sleeved on the outside of the filling column (54) and is spaced apart from the filling column (54); A heat recovery component (55) is arranged in the heat exchange pipe (52) and is used to cool the hot air flowing through the heat exchange pipe (52) and recover the heat for reuse; A cleaning component (56) is disposed between the two support frames (53) and is used to clean and collect powder adhered to the inner wall of the heat exchange pipe (52); The cleaning component (56) comprises: A reciprocating screw rod (561) is rotatably connected between the two support frames (53); A scraper (562) is slidably connected in the heat exchange pipe (52), and the scraper (562) is threadedly connected to the reciprocating screw (561). The scraper (562) abuts against the inner wall of the heat exchange pipe (52) and the outer wall of the filling column (54), and a plurality of air holes (5621) are also provided on the scraper (562); A cleaning pipe (563) is arranged outside the heat exchange pipe (52), and two cleaning pipes (563) are arranged. The two cleaning pipes (563) are respectively located on the sides of the two support frames (53) close to each other. A recovery bin (564) is connected to both cleaning pipes (563); A driving component (565) is disposed between the reciprocating screw (561) and the heat exchange pipe (52) and is used to drive the reciprocating screw to rotate; The opening and closing component (566) is disposed between the cleaning pipe (563) and the recovery bin (564) and is used to control the connection or disconnection between the cleaning pipe (563) and the recovery bin (564).

2. A disc dryer according to claim 1, characterized in that: The heat recovery component (55) comprises: A first cooling chamber (551) is arranged on the inner wall of the heat exchange pipe (52); A first water inlet pipe (552) is arranged outside the heat exchange pipe (52), and the first cooling chamber (551) is in communication with the first water inlet pipe (552), and the first water inlet pipe (552) is connected to external cooling water; The first water outlet pipe (553) is arranged outside the heat exchange pipe (52), and the first cooling chamber (551) is in communication with the first water outlet pipe (553).

3. A disc dryer according to claim 2, characterized in that: The heat recovery component (55) further comprises: A second cooling chamber (554) is disposed in the filling column (54); A second water inlet pipe (555) is disposed between the heat exchange pipe (52) and the filling column (54), and the second cooling chamber (554) is in communication with the second water inlet pipe (555), and the second water inlet pipe (555) is connected to external cooling water; The second water outlet pipe (556) is disposed between the heat exchange pipe (52) and the filling column (54), and the second cooling chamber (554) is in communication with the second water outlet pipe (556).

4. A disc dryer according to claim 1, characterized in that: The driving component (565) comprises: A rotating shaft (5651) rotatably connected to the heat exchange pipe (52); A bevel gear set (5652) is disposed between the rotating shaft (5651) and the reciprocating screw rod (561); The driving motor (5653) is arranged at one end of the rotating shaft (5651).

5. A disc dryer according to claim 1, characterized in that: The opening and closing component (566) comprises: A rotating shaft (5661) rotatably connected to the cleaning pipe (563); A baffle (5662) is fixed to the rotating shaft (5661); A worm gear (5663) is fixedly sleeved on the rotating shaft (5661); A worm (5664) is rotatably connected to the cleaning pipe (563), and the worm wheel (5663) and the worm (5664) are meshed with each other; The power motor (5665) is arranged at one end of the worm (5664).

6. A disc dryer according to claim 5, characterized in that: The opening and closing component (566) further includes: A weight sensor connected to the baffle (5662) for detecting the weight of the powder accumulated above the baffle (5662) and sending a weight detection signal; The controller is connected to the weight sensor and the power motor (5665) and is used to receive a weight detection signal to obtain the weight of the powder accumulated above the baffle (5662). When the weight of the powder accumulated above the baffle (5662) is greater than a preset weight, a control signal is output to the power motor (5665) so that the power motor (5665) drives the baffle (5662) to open to achieve communication between the cleaning pipe (563) and the recovery bin (564).

7. A disc dryer according to claim 1, characterized in that: The contact points between the scraper (562) and the heat exchange pipe (52) and the filling column (54) are all arranged in the form of pointed ends (5622).

8. A disc dryer according to any one of claims 1 to 7, characterized in that: A filter screen (6) is also provided at the inlet of the heat recovery pipeline (2), and a vibration motor (7) is provided on the filter screen (6).

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