Automatic depolymerization equipment and depolymerization process

Abstract

The present invention relates to the technical field of negative electrode graphite production, and discloses automatic depolymerization equipment and a depolymerization process, including: a material storage part, used to store materials to be depolymerized; a conveying part, used to convey the materials in the material storage part to the depolymerization part; a depolymerization part, used to depolymerize the incoming materials at a target roller distance and a target roller speed; a screening part, used to screen the depolymerized materials; and a pneumatic system, used to convey the screened unqualified materials to the material storage part. Through different process combinations of automatic depolymerization equipment, one-time automatic depolymerization can be achieved. The present invention can not only meet the requirements of the particle size distribution of the depolymerized materials before graphitization and carbonization, but also will not destroy the surface coating layer of the particles, increase the specific surface area of ​​the particles, and fully ensure the stability of the particle size distribution of the graphitized products and high-temperature carbonized products. In addition, the one-time screening rate of the materials is improved, which is 20% to 30% higher than that of the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of negative electrode graphite production, and more specifically to automatic depolymerization equipment and a depolymerization process. Background Art

[0002] During the production process of negative graphite, the graphitized and carbonized graphite particles are prone to agglomeration and need to be deagglomerated. The graphite powder is relatively fine, with an average particle size of less than 20um. The particles of the graphitized and carbonized products are agglomerated, and several particles are bonded together. According to the production process, the particles are deagglomerated and restored to the particle size distribution before graphitization and carbonization. The compressive strength of the agglomerated graphitized and carbonized products can reach up to 20-30MPA. The higher compressive strength is relatively easy for crushing, but relatively difficult for deagglomeration, especially the deagglomeration of the particles to restore the particle size before graphitization and carbonization, which is very difficult.

[0003] At present, deagglomeration usually adopts coarse crushing (jaw crusher, double roll crusher, tooth roll crusher) and fine crushing (mechanical mill, air flow mill) for pulverization. The one-time screening rate of some products is only 70%-80%, which has the problem of destroying the surface coating of particles. Moreover, after being crushed by fine crushing equipment, the specific surface area is very easy to increase, which may make the product scrapped.

[0004] Therefore, it is very necessary to propose automatic depolymerization equipment and depolymerization process to solve the problems existing in the prior art. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an automatic depolymerization device, comprising:

[0006] A material storage section, used for storing materials to be depolymerized;

[0007] The conveying section is used to convey the materials in the material storage section to the depolymerization section;

[0008] The deagglomeration section is used to deagglomerate the incoming materials at a target roller distance and target roller speed;

[0009] The screening section is used to screen the depolymerized materials;

[0010] The air conveying system is used to transport the unqualified materials after screening to the storage section.

[0011] Preferably, the depolymerization part comprises: a machine body, a feed hopper, a depolymerization body and a discharge channel arranged on the machine body in order from top to bottom;

[0012] The deagglomeration body comprises a roller A and a roller B, and the operation of the roller A and the roller B is controlled by a driving and adjusting device. The driving and adjusting device comprises: a driving mechanism for driving the deagglomeration body to rotate and a roller distance adjusting mechanism for adjusting the distance between the roller A and the roller B.

[0013] Preferably, the roller gap adjustment mechanism comprises: a bearing arm connected to the bearing of roller A, an adjustment base connected to the bearing arm, and the adjustment base is connected to the adjustment component for adjusting the roller gap through a connecting flange;

[0014] The adjusting assembly comprises a lead screw, one end of which is connected to a connecting flange, and the other end of which is connected to a driving part, and the driving part is arranged on the machine body.

[0015] Preferably, the conveying part comprises: a transition bucket, on which a flow control plate is provided, and the flow control plate is controlled by a flow regulating mechanism, and the flow regulating mechanism regulates the flow control plate according to the feed amount to ensure uniform conveyance of the material.

[0016] Among them, the adjustment mechanism adopts manual and electric dual control.

[0017] Preferably, it further comprises: a dust removal system, which uses a negative pressure dust collection method to remove dust during the entire depolymerization process.

[0018] Preferably, the method further comprises: a controller, which is used to obtain and judge the real-time deagglomeration parameters of the material within a set collection time period, and adjust the roller distance and roller speed of the deagglomeration unit according to the judgment result of the real-time deagglomeration parameters of the material, so as to control the real-time deagglomeration parameters of the material to meet the target deagglomeration parameters of the material when the deagglomeration unit works at the target roller distance and target roller speed;

[0019] The material real-time depolymerization parameters include: the specific surface area of ​​the depolymerized material and the material feeding speed of the depolymerization unit.

[0020] The depolymerization process uses the automatic depolymerization equipment of the present invention to depolymerize the material, comprising:

[0021] Feeding: The material to be depolymerized stored in the material storage section is transported to the depolymerization section for depolymerization through the conveying section;

[0022] Deagglomeration: Deagglomerate the incoming material using the deagglomeration section at the target roller distance and target roller speed;

[0023] Screening: The depolymerized materials are transported to the screening section for screening. The qualified materials after screening are discharged from the undersize outlet of the screening section, and the unqualified materials after screening are transported to the storage section through the air conveying system.

[0024] Preferably, the deagglomeration section is used to deagglomerate the incoming material at a target roller distance and a target roller speed, comprising:

[0025] Determine the initial target operating parameters of the depolymerization unit;

[0026] When the deaggregation unit works with the initial target working parameters, it obtains the real-time deaggregation parameters of the material in the current collection period, and compares the real-time deaggregation parameters of the material with the preset target deaggregation parameters of the material;

[0027] If the real-time depolymerization parameters of the material meet the target depolymerization parameters of the material, the initial target working parameters of the depolymerization unit are used as the current target working parameters, and the operation of the depolymerization unit is controlled according to the current target working parameters;

[0028] If the real-time deaggregation parameters of the material do not meet the target deaggregation parameters of the material, the initial target working parameters are automatically adjusted and updated until the real-time deaggregation parameters of the material meet the target deaggregation parameters of the material. The corresponding adjusted target working parameters are used as the current target working parameters, and the deaggregation unit is controlled to work according to the current target working parameters.

[0029] Preferably, the target working parameters include: a target roller distance and a target roller speed; the real-time deagglomeration parameters of the material include: a specific surface area of ​​the deagglomerated material and a material discharge speed of the deagglomeration unit.

[0030] Preferably, determining the initial target operating parameters of the depolymerization unit includes:

[0031] Obtaining the operating parameters of the deaggregation unit before the current collection period;

[0032] Obtain material depolymerization parameters in the depolymerization process before the current collection period;

[0033] The operating parameters of the deagglomeration unit are used as the input of the neural network model, and the material screening rate corresponding to the screening unit and the energy consumption corresponding to the deagglomeration unit are used as the output of the neural network model to obtain a material screening rate prediction model and an energy consumption prediction model;

[0034] Establish multiple objective functions based on the material screening rate prediction model, energy consumption prediction model and material deagglomeration parameters;

[0035] Genetic algorithms are used to solve multiple objective functions, and the optimal solutions obtained are used as the initial target working parameters of the deaggregation unit.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] The automatic depolymerization equipment and depolymerization process of the present invention realize one-time automatic depolymerization. Through different process combinations of the automatic depolymerization equipment, one-time automatic depolymerization can be realized. The automatic depolymerization equipment of the present invention can not only meet the requirements of the particle size distribution of the depolymerized material restored to that before graphitization and carbonization, but also avoid destroying the surface coating layer of the particles and increasing the specific surface area of ​​the particles, fully ensuring the stability of the particle size distribution of the graphitized product and the high-temperature carbonized product. In addition, the one-time screening rate of the material is improved by 20% to 30% compared with the prior art.

[0038] The automatic depolymerization equipment and depolymerization process of the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the working process of the automatic depolymerization equipment of the present invention;

[0041] Figure 2 It is a schematic diagram of the main structure of the depolymerization part in the automatic depolymerization equipment of the present invention;

[0042] Figure 3 It is a schematic diagram of the top view of the depolymerization part in the automatic depolymerization equipment of the present invention;

[0043] Figure 4 for Figure 3 Schematic diagram of the cross section of AA;

[0044] Figure 5 It is a schematic diagram of the structure of roller B and roller A in the automatic depolymerization equipment of the present invention;

[0045] Figure 6 It is a structural schematic diagram of the roller distance adjustment mechanism in the automatic depolymerization equipment of the present invention;

[0046] Figure 7 It is a structural schematic diagram of the regulating component in the automatic depolymerization equipment of the present invention;

[0047] Figure 8 It is a structural schematic diagram of the conveying part of the automatic depolymerization equipment of the present invention;

[0048] Fig. 9 It is a structural schematic diagram of the screening part in the automatic depolymerization equipment of the present invention;

[0049] Fig.10 is a flow chart of the depolymerization process of the present invention;

[0050] Fig.11 is a detailed flow chart of step S2 in the depolymerization process of the present invention;

[0051] Fig.12 Detailed flow chart of step S21 in the depolymerization process of the present invention. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0053] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0054] like Figure 1 As shown, the present invention provides an automatic depolymerization device, comprising:

[0055] A material storage section 1, used for storing materials to be depolymerized;

[0056] The material storage part 1 is a storage auxiliary device, which is mainly used for caching materials. The volume of the material storage part 1 is greater than or equal to 0.5 cubic meters. The material storage part 1 is equipped with an auxiliary unloading device and anti-sticking wall measures;

[0057] The conveying section 2 is used to convey the material in the storage section 1 to the depolymerization section 3;

[0058] The conveying part 2 is used to connect the material storage part 1 and the depolymerization part 3, and a feeding device capable of adjusting the feeding amount can be selected;

[0059] The deagglomeration section 3 is used to deagglomerate the incoming materials at a target roller distance and a target roller speed;

[0060] The deagglomeration section 3 may use a roller crusher, which is a crushing device with upgraded and improved roller distance and roller speed technology.

[0061] It is suitable for crushing various materials with hardness ≤160MPa. It squeezes the materials through two rotating rollers to achieve the effects of crushing and deagglomeration. During crushing, the two rotating rollers crush at the target roller distance to ensure that the specific surface area of ​​the materials meets the requirements.

[0062] The screening part 4 is used to screen the depolymerized material;

[0063] The screening part 4 may use a drum screen machine to screen the material depolymerized by the depolymerization part 3. The under-screened material is qualified material and is discharged from the under-screened material outlet 420. The over-screened material is unqualified material and is discharged from the over-screened material outlet 430 and sent back to the storage part 1 through the air delivery system 6. The screening part 4 uses a drum screen machine to meet the needs of large production and reduced floor space. It can simulate manual screening movement, and its screening accuracy, efficiency, and screen life are 3-5 times that of conventional circular vibrating screens.

[0064] The machine is also equipped with an ultrasonic generator 450 for cleaning the screen. The energy of the ultrasonic generator 450 is used to slightly impact the material, causing the material particles to move and vibrate slightly on the screen. Such slight impact and vibration can improve the screening efficiency and accuracy of the material. At the same time, the high-frequency vibration of the ultrasonic wave can also prevent the screen holes from being blocked and reduce the adhesion of sticky materials.

[0065] The drum screen machine occupies 2-3 times the area of ​​the circular vibrating screen, and the floor space is reduced by 50%, saving costs and energy consumption;

[0066] The air conveying system 6 is used to convey the unqualified materials after screening to the material storage part 1.

[0067] The conveying section 2, the depolymerizing section 3 and the screening section 4 can all be made of commonly used equipment in the prior art.

[0068] The present invention realizes one-time automatic depolymerization, and can realize one-time automatic depolymerization through different process combinations of automatic depolymerization equipment; the automatic depolymerization equipment of the present invention can not only meet the requirements of the particle size distribution of the depolymerized material before graphitization and carbonization, but also avoid destroying the surface coating layer of the particles and increasing the specific surface area of ​​the particles, fully ensuring the stability of the particle size distribution of the graphitized product and the high-temperature carbonized product, and also improves the one-time screening rate of the material, which is 20% to 30% higher than that of the prior art.

[0069] like Figure 2-Figure 4 As shown, in one embodiment, the depolymerization unit 3 includes: a machine body, a feed hopper 310, a depolymerization body and a discharge channel 370 arranged on the machine body from top to bottom; a discharge port 380 is arranged at the end of the discharge channel 370;

[0070] The deagglomeration body includes roller A320 and roller B330, and the operation of roller A320 and roller B330 is controlled by a driving adjustment device, which includes: a driving mechanism 340 for driving the deagglomeration body to rotate and a roller distance adjustment mechanism 350 for adjusting the distance between roller A320 and roller B330.

[0071] The driving mechanism 340 is used to provide driving force, and the roller B330 and the roller A320 are rotated through the belt. The roller A320 is installed on the adjustment seat. The roller spacing adjustment mechanism 350 can move the roller A320 along the fixed track. Its diameter is usually 200mm-800mm. The roller B330 is installed on the base and cannot be moved. The driving mechanism 340 includes a motor. The motor drive shaft pulley and the corresponding pulley of the roller B330 are connected by a belt. The diameter of the roller B330 is generally 1.5-2 times the diameter of the roller A320. The roller B330 is driven by the motor through a belt. The double-sided synchronous toothed belt drive is adopted between the roller B330 and the roller A320. The rotation speed of the roller B330 is greater than the rotation speed of the roller A320.

[0072] The following is a method for determining the rotation speed of roller B330 (i.e., target roller speed):

[0073] First, determine the process parameters that affect the deagglomeration of the material by roller speed:

[0074] The rotation speed of roller B330 affects the feeding speed of depolymerization. When the roller speed is high, the graphite itself is a lubricant and is relatively slippery. In addition, there is also the material bridging factor, which reduces the feeding speed or makes the feeding speed uneven. Therefore, only when the speed (line speed) is appropriate can the feeding speed be optimized.

[0075] In terms of structure, the speed of roller B330 should be determined by comprehensively considering the dynamic loss, output (feeding speed) and the large pulley diameter of the belt drive. If the speed is too high, the large pulley diameter will be relatively reduced, the output will increase, but the dynamic loss will also increase; if the speed is too low, although the dynamic loss is reduced, the output will also decrease, and the large pulley diameter will increase, affecting the size of the whole machine. If the speed variation range is not too large, the impact on the output is very small.

[0076] Secondly, determine the selection range of roller speed:

[0077] The speed of roller B330 can be selected between 100rpm and 1000rpm. Each speed corresponds to a material feeding speed and a material feeding speed coefficient. The range of the material feeding speed coefficient is 0.5 to 1.

[0078] Finally, the target roller speed is determined based on the process parameters that affect the depolymerization of the material and the selection range of the roller speed:

[0079] To determine the appropriate roller speed, you need to consider the change in the material feeding speed, and then choose it within 100rpm ~ 1000rpm;

[0080] In the range of 100rpm to 1000rpm, the rotation speed of roller B330 (i.e., roller speed) is 100rpm, 600rpm, and 1000rpm as examples: for example, the material unloading speed coefficient corresponding to the rotation speed of 100rpm is 0.5, the material unloading speed coefficient corresponding to the rotation speed of 600rpm is 1, and the material unloading speed coefficient corresponding to the rotation speed of 1000rpm is 0.5. When the material unloading speed coefficient is 1, the corresponding material unloading speed is the largest, and the rotation speed corresponding to the material unloading speed coefficient of 1 should be selected as the target roller speed; therefore, considering the above situation comprehensively, the rotation speed of roller B330 is preferably 450rpm to 600rpm, and the specific target roller speed can be selected from 450rpm to 600rpm to optimize the material unloading speed.

[0081] like Figure 5 As shown, roller B330 and roller A320 are made of steel roller 390 as a whole. The surface of steel roller 390 is coated with rubber or nylon 391, which can avoid contact between materials and metals and effectively improve the increase of magnetic materials. It can protect roller B330 and roller A320 from wear and tear, increase surface friction, and effectively prevent the material between roller B330 and roller A320 from sliding and bridging without unloading, thereby improving operating efficiency.

[0082] like Figure 6-Figure 7 As shown, further, the roller distance adjustment mechanism 350 includes: a bearing arm 351 connected to the bearing of the roller A320, an adjustment base 352 connected to the bearing arm 351, and the adjustment base 352 is connected to the adjustment component 360 for adjusting the roller distance through a connecting flange 353;

[0083] The adjustment assembly 360 includes a lead screw 361 , one end of which is connected to the connection flange 353 , and the other end of which is connected to a driving part 362 , and the driving part 362 is disposed on the machine body.

[0084] The driving unit 362 includes a driving motor and a turbine connected to the screw 361, which can automatically adjust the distance between roller B330 and roller A320 to maintain the target roller distance; the driving motor can drive the turbine to rotate, thereby driving the screw 361 to move in a straight line, and the screw 361 drives the connecting flange 353, the adjustment base 352, the bearing arm 351 and the roller A320 to move synchronously, thereby realizing the adjustment of the roller distance.

[0085] The following is a method for determining the distance between roller B330 and roller A320 (i.e., target roller distance):

[0086] First, determine the process parameters that affect the deagglomeration of materials by roller distance:

[0087] Since the size of the roller distance affects the particle size of the material after deagglomeration, the smaller the roller distance, the smaller the particle size, the larger the specific surface area, and the higher the screening rate; the larger the roller distance, the larger the particle size, the smaller the specific surface area, and the lower the screening rate; if the material morphology is to be kept the same, it is necessary to select a suitable roller distance to ensure that the specific surface area does not increase while the screening rate is the highest;

[0088] Secondly, determine the range of roller spacing:

[0089] The roller spacing can be selected between 0mm and 5mm. Each roller spacing corresponds to the screening rate and specific surface area (expressed by the change multiple of the specific surface area, that is, the ratio of the specific surface area of ​​the depolymerized material to the original specific surface area of ​​the material). The corresponding screening rate ranges from 60% to 95%, and the specific surface area change multiple ranges from 1 to 2.

[0090] Finally, the target roller distance is determined based on the process parameters that affect the depolymerization of materials and the selection range of roller distance:

[0091] To determine the appropriate roller spacing, it is necessary to comprehensively consider the changes in screening rate and specific surface area, and then select within 0mm to 5mm;

[0092] In the range of 0mm to 5mm, examples are given when the roller spacing is 0.5mm, 1.5mm and 3mm: for example, when the roller spacing is 0.5mm, the screening rate is 93%, and the corresponding specific surface area change multiple is 1.5 (the specific surface area of ​​the depolymerized material increases); when the roller spacing is 1.5mm, the screening rate is 88%, and the corresponding specific surface area change multiple is 1; when the roller spacing is 3mm, the screening rate is 80%, and the corresponding specific surface area change multiple is 1;

[0093] When the specific surface area change multiple is 1, it indicates that the specific surface area of ​​the depolymerized material is qualified. When the specific surface area change multiple is greater than 1, it indicates that the specific surface area of ​​the depolymerized material increases, indicating that the surface morphology of the particles is destroyed, and the specific surface area of ​​the depolymerized material increases compared with the original specific surface area of ​​the material. Therefore, when selecting the roller spacing, first determine the roller spacing range corresponding to the specific surface area change multiple of 1, and then select the roller spacing corresponding to the maximum screening rate within this roller spacing range as the target roller spacing, and the target roller spacing is preferably 1mm to 2mm.

[0094] Therefore, by adopting the above-mentioned method for determining the target roller distance, it can be finally determined that when the distance between roller B330 and roller A320 is maintained in the range of 1mm to 2mm, the specific surface area can be changed by 1 multiple and the screening rate is maximized, thereby maintaining the highest efficiency and ensuring the uniformity and consistency of the fineness of the crushed particles; therefore, setting a reasonable target roller distance can maintain the original appearance of the particles and avoid increasing the specific surface area.

[0095] like Figure 8As shown, in one embodiment, the conveying part 2 includes: a transition bucket 210, on which a flow control plate 220 is provided, and the flow control plate 220 is controlled by a flow regulating mechanism, and the flow regulating mechanism adjusts the flow control plate 220 according to the feed amount to ensure uniform conveyance of the material.

[0096] The conveying section 2 can be separately arranged between the deagglomeration section 3 and the material storage section 1; or, it can be directly arranged on the deagglomeration section 3. In this arrangement, the feed hopper 310 of the deagglomeration section 3 can be used as the transition hopper 210;

[0097] The flow control plate 220 controls its rotation through the flow regulating mechanism to adjust the opening of the transition bucket 210;

[0098] The flow regulating mechanism adopts manual and electric dual control, preferably electric control, to achieve automatic adjustment of the opening of the transition bucket 210.

[0099] The conveying section 2 is a key device for the feeding size connecting the storage section 1 to the depolymerization section 3. The flow control plate 220 has two adjustment modes. The manual control adjustment mechanism is simple and low in cost, and the electric control adjustment mechanism is highly sensitive and can follow the load of the roller.

[0100] like Fig. 9 As shown, in one embodiment, the screening part 4 includes: a main body, a screen 410 is arranged inside the main body through a screen frame 440, a screen outlet 420 is provided at the bottom, and a screen outlet 430 is provided at the side; the screening part 4 screens the deagglomerated material, the screen under is qualified material, and is discharged from the screen under outlet 420, and the screen over is unqualified material, which is discharged from the screen over outlet 430 and then sent back to the storage part 1 through the air delivery system 6 for re-deagglomeration.

[0101] In one embodiment, it further comprises: a dust removal system 5, which uses a negative pressure dust collection method to remove dust during the entire depolymerization process.

[0102] The entire depolymerization production line uses a pulse dust collector with negative pressure to collect dust, so that the dust in the entire on-site environment is ≤10mg / m 3 standards.

[0103] In one embodiment, it further includes: a controller, which is used to obtain and judge the real-time deagglomeration parameters of the material within a set collection time period, and adjust the roller distance and roller speed of the deagglomeration unit 3 according to the judgment result of the real-time deagglomeration parameters of the material, so as to control the real-time deagglomeration parameters of the material to meet the target deagglomeration parameters of the material when the deagglomeration unit 3 works at the target roller distance and target roller speed;

[0104] The material real-time depolymerization parameters include: the specific surface area of ​​the depolymerized material and the material feeding speed of the depolymerization unit 3 .

[0105] The real-time deagglomeration parameters of the material meet the standard of the target deagglomeration parameters of the material, referring to the preferred range in the aforementioned method for determining the target roller distance and the target roller speed (the target roller distance is preferably 1 mm to 2 mm, and the target roller speed is preferably 450 rpm to 600 rpm), that is, the specific surface area of ​​the crushed material is the same as the original specific surface area of ​​the material, and the feeding speed of the deagglomeration unit 3 can make the feeding speed coefficient 1.

[0106] Since the specific surface area of ​​the crushed material is related to the roller distance, and the material discharge speed of the deagglomeration section 3 is related to the roller speed, it is necessary to detect and judge the real-time deagglomeration parameters of the material to adjust the roller distance and roller speed of the deagglomeration section 3 to ensure the deagglomeration effect and deagglomeration efficiency of the material.

[0107] like Fig.10 As shown, the present invention also provides a depolymerization process, which uses the automatic depolymerization equipment of the present invention to depolymerize the material, comprising:

[0108] S1, feeding: the material to be depolymerized stored in the material storage part 1 is transported to the depolymerization part 3 through the conveying part 2 for depolymerization;

[0109] S2, deagglomeration: deagglomerating the incoming material using the deagglomeration section 3 at the target roller distance and target roller speed;

[0110] S3. Screening: The crushed materials are transported to the screening section 4 for screening. The qualified materials after screening are discharged from the undersize outlet 420 of the screening section 4, and the unqualified materials after screening are transported to the storage section 1 through the air conveying system 6.

[0111] By adopting the depolymerization process of the present invention, the material can be depolymerized at one time, and the particle size distribution before graphitization and carbonization can be restored by depolymerization instead of being crushed to the particles of specification, and the coating layer on the surface of the particles will not be destroyed, and the specific surface area of ​​the particles will not be increased, thereby ensuring the particle size quality stability of the graphitized product and the high-temperature carbonized product; and the one-time screening rate of the material is improved.

[0112] like Fig.11 As shown, in one embodiment, the deagglomeration section 3 is used to deagglomerate the incoming material at a target roller distance and a target roller speed, including:

[0113] S21, determining the initial target operating parameters of the depolymerization unit 3;

[0114] The target roller gap and target roller speed can be set according to the preferred range in the above-mentioned determination method (the target roller gap is preferably 1 mm to 2 mm, and the target roller speed is preferably 450 rpm to 600 rpm). For example, the initial target roller gap is set to 1 mm, and the target roller speed is set to 550 rpm.

[0115] S22, when the deaggregation unit 3 works with the initial target working parameters, the real-time deaggregation parameters of the materials in the current collection period are obtained, and the real-time deaggregation parameters of the materials are compared with the preset target deaggregation parameters of the materials;

[0116] Real-time detection of the material deagglomeration when working at the initial target working parameters is performed to determine the material feeding speed and the specific surface area of ​​the material after deagglomeration, so as to avoid fluctuations in the roller distance and roller speed of rollers B330 and A320 that may adversely affect the deagglomeration effect;

[0117] S23, if the real-time depolymerization parameters of the material meet the target depolymerization parameters of the material, the initial target working parameters of the depolymerization unit 3 are used as the current target working parameters, and the depolymerization unit 3 is controlled to work according to the current target working parameters;

[0118] This step indicates that the current target roller distance and target roller speed of the deagglomeration unit 3 can make the real-time deagglomeration parameters of the material meet the target deagglomeration parameters of the material. Therefore, there is no need to adjust the roller distance and roller speed, and the deagglomeration unit 3 can be controlled to maintain the current state;

[0119] S24, if the real-time deaggregation parameter of the material does not meet the target deaggregation parameter of the material, the initial target working parameter is updated until the real-time deaggregation parameter of the material meets the target deaggregation parameter of the material, and the corresponding updated target working parameter is used as the current target working parameter, and the deaggregation unit 3 is controlled to work according to the current target working parameter;

[0120] This step indicates that the current target roller spacing and target roller speed of the deagglomeration unit 3 cannot make the real-time deagglomeration parameters of the material meet the target deagglomeration parameters of the material. Therefore, the roller spacing and roller speed need to be adjusted. When the real-time deagglomeration parameters of the material meet the target deagglomeration parameters of the material, the adjusted roller spacing and roller speed (i.e., the updated target working parameters) are used as the control standard of the deagglomeration unit 3.

[0121] The target working parameters include: target roller distance and target roller speed; the real-time material deagglomeration parameters include: specific surface area of ​​the deagglomerated material and the material discharge speed of the deagglomeration unit 3 .

[0122] Through the above scheme, it is possible to determine whether the current target roller distance and target roller speed need to be adjusted by detecting the specific surface area and the feeding speed of the material, so that the deagglomeration part 3 uses the target roller distance and the target roller speed as control standards to ensure the deagglomeration effect of the material.

[0123] The initial target operating parameters of the deagglomeration section 3 can be set according to the preferred ranges in the above-mentioned method for determining the target roller distance and the target roller speed (the target roller distance is preferably 1 mm to 2 mm, and the target roller speed is preferably 450 rpm to 600 rpm), or can be set according to the following method. When setting according to the following method, the historical data can be used for setting before each operation of the deagglomeration section 3;

[0124] Specifically, if Fig.12 As shown, determining the initial target operating parameters of the depolymerization unit 3 includes:

[0125] S211, obtaining the operating parameters of the deaggregation unit 3 before the current collection period;

[0126] S212, obtaining material depolymerization parameters in the depolymerization process before the current collection period;

[0127] S213, using the operating parameters of the deagglomeration unit 3 as the input of the neural network model, and using the material screening rate corresponding to the screening unit 4 and the energy consumption corresponding to the deagglomeration unit 3 as the output of the neural network model, to obtain a material screening rate prediction model and an energy consumption prediction model;

[0128] S214, establishing multiple objective functions based on the material screening rate prediction model, the energy consumption prediction model and the material deagglomeration parameters;

[0129] S215 , solving multiple objective functions using a genetic algorithm, and obtaining the optimal solution as the initial target working parameter of the deaggregation unit 3 .

[0130] Among them, multiple objective functions include: energy consumption objective function f 1 , Material screening rate objective function f 2 , the specific surface area objective function f of the material 3 And the feeding speed objective function f 4 , multiple objective functions are constrained by the following conditions:

[0131]

[0132] Among them, y 1 is the energy consumption prediction model, y 2 is the material screening rate prediction model, S 2 is the specific surface area of ​​the crushed material, S 1 is the original specific surface area of ​​the material, V is the feeding speed of the depolymerization section 3; y 1 =f(x 1 ,x 2 ), y 2 =f(x 1 ,x 2 ), where x 1 is the roller distance, x2 is the roller speed, min() is the minimum value, and max() is the maximum value.

[0133] Before establishing the neural network model, the operating parameters of the deagglomeration part 3 are processed to obtain a sample parameter set, and the sample parameter set is randomly divided into a training sample parameter set and a test sample parameter set according to a set ratio; then the training sample parameter set is used as the input of the neural network model, and the material screening rate of the screening part 4 and the energy consumption corresponding to the deagglomeration part 3 are used as the output of the neural network model to obtain a material screening rate prediction model and an energy consumption prediction model; the neural network model is tested using the test sample parameter set.

[0134] Processing the operating parameters of the deaggregation unit 3 includes: removing abnormal values ​​in the operating parameters and performing normalization processing.

[0135] The initial target working parameters are updated by using steps S211-S215 to update the initial target working parameters when the real-time deagglomeration parameters of the material in the current collection period do not meet the target deagglomeration parameters of the material, that is, redetermining the target working parameters to ensure that the target working parameters are optimal; or, based on the operating working parameters of the deagglomeration unit 3 obtained in the current collection period, predictions are made through the trained material screening rate prediction model and energy consumption prediction model to obtain the target working parameters updated for the next collection period.

[0136] Through the above scheme, the target roller distance and target roller speed of the deagglomeration section 3 can be controlled to reduce the energy consumption of the deagglomeration section 3, increase the output, improve the screening rate of the crushed material, do not increase the specific surface area of ​​the material, and maintain the original appearance of the material as much as possible; and through the intelligent control of the deagglomeration process, it is possible to reduce manual operation and reduce operating costs.

[0137] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0138] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0139] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A depolymerization process, characterized in that: include: Feeding: The material to be depolymerized stored in the material storage section (1) is transported to the depolymerization section (3) for depolymerization through the conveying section (2); Deagglomeration: Deagglomerating the incoming material using the deagglomeration section (3) at a target roller distance and a target roller speed; Screening: the depolymerized material is transported to the screening section (4) for screening, and the qualified material after screening is discharged from the undersize outlet (420) of the screening section (4), and the unqualified material after screening is transported to the storage section (1) through the air delivery system (6); The deagglomeration section (3) is used to deagglomerate the incoming material at a target roller distance and a target roller speed, including: Determining initial target operating parameters of the depolymerization unit (3); When the deaggregation unit (3) operates with the initial target working parameters, it obtains the real-time deaggregation parameters of the material in the current collection period, and compares the real-time deaggregation parameters of the material with the preset target deaggregation parameters of the material; If the real-time depolymerization parameters of the material meet the target depolymerization parameters of the material, the initial target working parameters of the depolymerization unit (3) are used as the current target working parameters, and the operation of the depolymerization unit (3) is controlled according to the current target working parameters; If the real-time deaggregation parameters of the material do not meet the target deaggregation parameters of the material, the initial target working parameters are updated until the real-time deaggregation parameters of the material meet the target deaggregation parameters of the material, and the corresponding updated target working parameters are used as the current target working parameters, and the deaggregation unit (3) is controlled to work according to the current target working parameters; The target working parameters include: target roller distance and target roller speed; the real-time material deagglomeration parameters include: specific surface area of ​​the deagglomerated material and the material discharge speed of the deagglomeration section (3); Determine the initial target operating parameters of the depolymerization unit (3), including: Obtaining the operating parameters of the deaggregation unit (3) before the current collection period; Obtain material depolymerization parameters in the depolymerization process before the current collection period; Using the operating parameters of the deagglomeration section (3) as the input of the neural network model, using the material screening rate corresponding to the screening section (4) and the energy consumption corresponding to the deagglomeration section (3) as the output of the neural network model, and obtaining a material screening rate prediction model and an energy consumption prediction model; Establish multiple objective functions based on the material screening rate prediction model, energy consumption prediction model and material deagglomeration parameters; The genetic algorithm is used to solve multiple objective functions, and the optimal solution obtained is used as the initial target working parameter of the deaggregation unit (3).

2. An automatic depolymerization device, characterized in that: The depolymerization process according to claim 1 is used for depolymerization, comprising: A material storage section (1), used for storing materials to be depolymerized; A conveying section (2) for conveying materials in the material storage section (1) to the depolymerization section (3); A deagglomeration section (3), used for deagglomerating the incoming material at a target roller distance and a target roller speed; A screening section (4), used for screening the depolymerized material; An air conveying system (6) is used to convey the screened unqualified materials to the material storage section (1); It also includes: a controller, which is used to obtain and judge the real-time deagglomeration parameters of the material within a set collection time period, and adjust the roller distance and roller speed of the deagglomeration section (3) according to the judgment result of the real-time deagglomeration parameters of the material, so as to control the real-time deagglomeration parameters of the material to meet the target deagglomeration parameters of the material when the deagglomeration section (3) operates at the target roller distance and target roller speed; The material real-time depolymerization parameters include: the specific surface area of ​​the depolymerized material and the material discharge speed of the depolymerization section (3).

3. The automatic depolymerization equipment according to claim 2, characterized in that: The depolymerization section (3) comprises: a machine body, a feed hopper (310), a depolymerization body and a discharge channel arranged on the machine body in order from top to bottom; The deagglomeration body comprises a roller A (320) and a roller B (330), and the operation of the roller A (320) and the roller B (330) is controlled by a driving and adjusting device, wherein the driving and adjusting device comprises: a driving mechanism (340) for driving the deagglomeration body to rotate and a roller distance adjusting mechanism (350) for adjusting the distance between the roller A (320) and the roller B (330).

4. The automatic depolymerization device according to claim 3, characterized in that: The roller gap adjustment mechanism (350) comprises: a bearing arm (351) connected to the bearing of the roller A (320), an adjustment base (352) connected to the bearing arm (351), and the adjustment base (352) is connected to an adjustment component (360) for adjusting the roller gap via a connecting flange (353); The adjustment assembly (360) comprises a lead screw (361), one end of which is connected to the connection flange (353), and the other end of which is connected to a driving part (362), wherein the driving part (362) is arranged on the machine body.

5. The automatic depolymerization equipment according to claim 2, characterized in that: The conveying section (2) comprises a transition bucket (210) on which a flow control plate (220) is provided, wherein the flow control plate (220) is controlled by a flow regulating mechanism, and the flow regulating mechanism regulates the flow control plate (220) according to the feed amount so as to ensure uniform material conveyance.

6. The automatic depolymerization device according to claim 2, characterized in that: Also includes: The dust removal system (5) uses negative pressure dust collection to remove dust from the entire depolymerization process.

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