Powder drying dust recovery system

Abstract

The utility model provides a powder drying and dust recycling system. The powder drying and dust recycling system comprises a drying device, a dust removing mechanism, a temporary storage bin device, a feeding device and a mixing device. The dust removal mechanism comprises an air inlet pipe, a cloth bag dust collection device, an exhaust fan, a slag discharge pipe and a slag discharge valve installed on the slag discharge pipe, the two ends of the air inlet pipe are communicated with the drying device and the cloth bag dust collection device respectively, the exhaust fan is communicated with an air outlet of the cloth bag dust collection device, and the slag discharge pipe is communicated with the cloth bag dust collection device; the two ends of the temporary storage bin device communicate with the slag discharging pipe and the feeding device correspondingly, and the two ends of the material mixing device communicate with the feeding device and the drying device correspondingly. The slag discharge pipe is closed through the slag discharge valve, so that a closed gas path is formed between the drying device and the slag discharge pipe, precursor dust is prevented from being hardened due to contact with condensed water, and the blockage condition of the bag dust collection device is improved; the precursor dust is conveyed to the mixing device through the slag discharging pipe, the temporary storage bin device and the feeding device in sequence, and recycling of the precursor dust is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of production of battery materials, and particularly to a powder drying dust recovery system. Background Art

[0002] The new energy electric vehicle industry in China has developed rapidly. Due to fierce industry competition, enterprises need to control the costs in the production process. In the production process of battery materials, it is necessary to dry the precursor materials through a drying device. During the drying process of the materials, water vapor needs to be removed in a timely manner. The water vapor outlet of the drying device is connected to a bag filter. When the water vapor containing precursor dust passes through the bag filter, the precursor dust is intercepted by the bags of the bag filter. The air pipe above the bags regularly opens to blow the precursor dust on the bags, and the blown-down precursor dust is collected through a slag discharge pipe.

[0003] In the process of continuously producing precursor materials, the drying process of the drying device is continuous. After the exhaust fan is turned on, a negative pressure is formed in the pipeline connecting the drying device, so that the water vapor generated by the drying device is continuously pumped away and discharged. However, since the slag discharge pipe is not sealed, cold air can enter the bag filter from the slag discharge pipe. When the cold air contacts the water vapor, condensed water is generated. When the condensed water contacts the precursor dust, the precursor dust caking blocks the slag discharge pipe, thus causing the bag dust collection device to be blocked and fail. As a result, the water vapor of the drying device cannot be discharged in a timely manner, and finally the moisture content of the precursor finished product exceeds the standard. The blocked bag filter also needs to stop the production line for cleaning and maintenance. During the process of cleaning and collecting the precursor dust, since the precursor dust is exposed to the external environment, there is a risk of introducing foreign substances during the collection of the precursor dust, so that the collected precursor dust cannot be recycled to the production line in a timely manner, resulting in waste of the produced precursor materials. Summary of the Utility Model

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a powder drying dust recovery system that can improve the blockage of the bag dust collection device and realize the recycling of precursor dust.

[0005] The purpose of the present disclosure is achieved through the following technical solutions:

[0006] A powder drying dust recovery system includes a drying device, a dust removal mechanism, a buffer bin device, a feeding device, and a mixing device. The drying device is provided with a material drying inlet, an exhaust gas outlet, and a material drying outlet;

[0007] The dust removal mechanism includes an intake pipe, a bag dust collector, a suction fan, a slag discharge pipe and a slag discharge valve. One end of the intake pipe is connected to the waste gas outlet, and the other end of the intake pipe is connected to the air inlet of the bag dust collector. The suction fan is connected to the air outlet of the bag dust collector. The feed inlet of the slag discharge pipe is connected to the slag discharge port of the bag dust collector, and the slag discharge valve is installed on the slag discharge pipe;

[0008] The feed inlet of the buffer bin device is connected to the discharge outlet of the slag discharge pipe. The feed inlet of the feeding device is connected to the discharge outlet at the bottom of the buffer bin device. The first feed inlet of the mixing device is located on one side of the second feed inlet of the mixing device. The first feed inlet of the mixing device is connected to the discharge outlet of the feeding device, and the second feed inlet of the mixing device is connected to the drying material outlet.

[0009] In one embodiment, the dust removal mechanism further includes a water curtain dust removal tower. The air inlet of the water curtain dust removal tower is connected to the air outlet of the bag dust collector, and the suction fan is connected to the air outlet of the water curtain dust removal tower.

[0010] In one embodiment, the bag dust collector includes a dust removal housing, an intercepting bag and a back-blowing assembly. The dust removal housing is provided with an air passing channel. The intercepting bag divides the air passing channel into a back-blowing channel on the side of the air inlet end of the intercepting bag and a collecting channel on the side of the air outlet end of the intercepting bag. The back-blowing assembly is installed on the dust removal housing, and the blowing end of the back-blowing assembly is arranged in the back-blowing channel. The other end of the intake pipe is connected to the collecting channel, the feed inlet of the slag discharge pipe is connected to the collecting channel, and the air inlet of the water curtain dust removal tower is connected to the back-blowing channel.

[0011] In one embodiment, the dust removal mechanism further includes a vibrating assembly and a back-blowing pipe. The vibrating assembly is installed on the slag discharge pipe, the back-blowing pipe is connected to the slag discharge pipe, and the back-blowing pipe is arranged between the slag discharge valve and the bag dust collector.

[0012] In one embodiment, the buffer bin device includes a bin, a feed hopper, a bracket, a feed butterfly valve, a negative pressure conveying pipe and a breathing valve. The bin and the feed hopper are both fixed on the bracket. The discharge outlet of the feed hopper is connected to the feed inlet of the bin. The feed butterfly valve is arranged at the outlet of the feed hopper. The feed inlet of the bin is connected to the discharge outlet of the slag discharge pipe. The discharge outlet of the bin is connected to one end of the negative pressure conveying pipe, and the other end of the negative pressure conveying pipe is connected to the feed inlet of the feeding device. The breathing valve is installed on the negative pressure conveying pipe.

[0013] In one embodiment, the feeding device includes a feeding butterfly valve, a vacuum conveying assembly, a discharging air lock, a conveying discharge pipe, and a first weighing assembly. The feeding port of the vacuum conveying assembly is communicated with the discharging port of the buffer bin device. The feeding butterfly valve is installed at the feeding port of the vacuum conveying assembly. The discharging air lock is installed at the discharging port of the vacuum conveying assembly. One end of the conveying discharge pipe is communicated with the discharging air lock, and the other end of the conveying discharge pipe is communicated with the feeding port of the mixing device. The first weighing assembly is installed outside the vacuum conveying assembly.

[0014] In one embodiment, the feeding device further includes a first iron remover, and the first iron remover is installed on the conveying discharge pipe.

[0015] In one embodiment, the mixing device includes a cylinder body, a stirring assembly, a drying feeding pipe, and a second weighing assembly. The stirring assembly is installed in the cylinder body, and the stirring end of the stirring assembly is arranged inside the cylinder body. The drying material outlet of the drying device is communicated with the feeding port of the drying feeding pipe. The first feeding port of the cylinder body is located on one side of the second feeding port of the cylinder body. The other end of the drying feeding pipe is communicated with the second feeding port of the cylinder body. The feeding device is communicated with the first feeding port of the cylinder body. The second weighing assembly is installed at the bottom of the cylinder body.

[0016] In one embodiment, the mixing device further includes a second iron remover, and the second iron remover is installed on the drying feeding pipe.

[0017] In one embodiment, the powder drying dust recovery system further includes a screening and iron removing device and a packaging device. The feeding port of the screening and iron removing device is communicated with the discharging port at the bottom of the cylinder body, and the packaging device is arranged after the screening and iron removing device.

[0018] Compared with the prior art, the present disclosure has at least the following advantages:

[0019] 1. For the above-mentioned powder drying dust recovery system, by controlling the closing of the slag discharge pipe through the slag discharge valve, a closed gas path is formed between the drying device and the slag discharge pipe, preventing cold air from entering the bag dust collector through the slag discharge pipe, avoiding the generation of condensed water due to the contact between the drying water vapor and cold air. At the same time, the induced draft fan timely extracts the water vapor generated in the drying device from the bag dust collector, thereby avoiding the agglomeration caused by the contact between the precursor dust and the condensed water, and further improving the blockage situation of the bag dust collector and reducing the work of cleaning and maintaining the bag dust collector.

[0020] 2. The moisture in the drying process is filtered through a bag dust collector. The precursor dust after filtration enters the buffer bin device through the slag discharge pipe. Then, the precursor dust is conveyed to the mixing device through the feeding device for mixing, realizing the recycling of the precursor dust, reducing the waste of the precursor material during the production process, and improving the utilization rate of the precursor material.

[0021] 3. The precursor material circulates inside the powder drying dust recovery system, making the powder drying dust recovery system have good sealing performance, avoiding the risk of foreign matter introduction to the precursor material, reducing the waste of the precursor material during the slag discharge process, and thus reducing the production cost.

[0022] 4. When the high-magnetic precursor material is reprocessed, the high-magnetic precursor material can be unloaded from the hopper into the silo. The feeding device conveys the high-magnetic precursor material in the silo to the mixing device. The first electromagnetic separator of the feeding device first demagnetizes the high-magnetic precursor material once. Then, the high-magnetic precursor material enters the screening and demagnetizing device from the mixing device for screening and demagnetizing, making the content of magnetic foreign matter in the demagnetized high-magnetic precursor material less, and making the operation of reprocessing the high-magnetic material simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic structural diagram of a powder drying dust recovery system of an embodiment;

[0025] Figure 2 For Figure 1 It is a schematic structural diagram of the dust removal mechanism shown;

[0026] Figure 3 For Figure 1 It is a schematic structural diagram of the buffer bin device shown;

[0027] Figure 4 For Figure 1 It is a schematic partial structural diagram of the powder drying dust recovery system shown.

[0028] Reference Numerals: 10 - Powder Drying Dust Recovery System; 100 - Drying Device; 101 - Feed Inlet for Drying; 102 - Exhaust Gas Outlet; 103 - Dried Material Outlet; 200 - Dust Removal Mechanism; 210 - Inlet Pipe; 220 - Bag Filter Dust Collector; 221 - Dust Collection Housing; 222 - Intercepting Bag; 223 - Back Blowing Assembly; 2201 - Air Passing Channel; 2202 - Back Blowing Channel; 2203 - Collection Channel; 230 - Exhaust Fan; 240 - Slag Discharge Pipe; 250 - Slag Discharge Valve; 260 - Water Curtain Dust Removal Tower; 270 - Vibration Component; 280 - Back Blowing Pipe; 290 - Air Compressor; 300 - Buffer Bin Device; 310 - Bin; 320 - Hopper; 330 - Support; 340 - Butterfly Valve for Discharging; 350 - Discharge Conveyor Pipe; 360 - Breathing Valve; 400 - Vacuum Feeder; 410 - Feed Butterfly Valve; 420 - Vacuum Conveying Assembly; 430 - Discharge Air Lock; 440 - Conveying and Discharging Pipe; 450 - First Weighing Component; 460 - First Iron Remover; 500 - Mixing Device; 510 - Cylinder Block; 520 - Stirring Assembly; 530 - Drying Feed Pipe; 540 - Second Weighing Component; 550 - Second Iron Remover; 600 - Screening and Iron Removal Device; 700 - Packaging Device. Detailed Embodiments

[0029] To facilitate the understanding of the present disclosure, the present disclosure will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure content of the present disclosure is more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. The terms used in the description of the present disclosure herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] To better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure will be further described in detail below with reference to specific embodiments:

[0033] As Figure 1 and Figure 2 shown, it is a powder drying dust recovery system 10 according to an embodiment of the present disclosure, including a drying device 100, a dust removal mechanism 200, a buffer bin device 300, a feeding device 400 and a mixing device 500. The drying device 100 is provided with a material drying inlet 101, an exhaust gas outlet 102 and a material drying outlet 103. The drying device can dry the precursor material, and the dried water vapor is discharged through the exhaust gas outlet 102;

[0034] Further, the dust removal mechanism 200 includes an intake pipe 210, a bag dust collector 220, a suction fan 230, a slag discharge pipe 240 and a slag discharge valve 250. One end of the intake pipe 210 is connected to the exhaust gas outlet 102, and the other end of the intake pipe 210 is connected to the air inlet of the bag dust collector 220. The suction fan 230 is connected to the air outlet of the bag dust collector 220. The bag dust collector 220 is used to filter the precursor dust in the water vapor. The back blowing assembly 223 in the bag dust collector 220 can also blow the precursor dust, so that the precursor dust is discharged from the slag discharge port of the bag dust collector 220. The feed inlet of the slag discharge pipe 240 is connected to the slag discharge port of the bag dust collector 220. The slag discharge valve 250 is installed on the slag discharge pipe 240, and the slag discharge valve 250 can close the slag discharge pipe 240; The feed inlet of the buffer bin device 300 is connected to the discharge outlet of the slag discharge pipe 240. The feed inlet of the feeding device 400 is connected to the discharge outlet at the bottom of the buffer bin device 300. The mixing device 500 is provided with a first feed inlet and a second feed inlet. The first feed inlet of the mixing device 500 is located on one side of the second feed inlet of the mixing device 500. The first feed inlet of the mixing device 500 is connected to the discharge outlet of the feeding device 400. The feeding device 400 can convey the precursor material in the buffer bin device 300 into the mixing device 500. The second feed inlet of the mixing device 500 is connected to the material drying outlet 103. The precursor material dried by the drying device 100 can be added into the mixing device 500 through the material drying outlet 103.

[0035] In this embodiment, the precursor material to be dried enters the drying device 100 from the drying material inlet 101 for drying, and the dried precursor material enters the mixing device 500 from the drying material outlet 103 for mixing. After the slag discharge valve 250 controls the closing of the slag discharge pipe 240, the induced draft fan 230 is started to generate negative pressure in the bag dust collector 220. The water vapor generated during the drying of the drying device 100 continuously enters the bag dust collector 220 from the air inlet pipe 210 for filtration. The bag dust collector 220 intercepts the precursor dust particles carried in the water vapor, and the water vapor is drawn away by the induced draft fan 230. The filtered precursor dust enters the slag discharge pipe 240 from the slag discharge port. Some of the precursor dust adheres to the bag dust collector 220. The bag dust collector 220 blows the precursor dust, so that the precursor dust enters the slag discharge pipe 240 from the slag discharge port. The precursor dust then enters the buffer bin device 300 through the slag discharge pipe 240, so that the precursor dust is stored in the buffer bin device 300. The precursor dust enters the feeding device 400 through the discharge port of the buffer bin device 300, and the feeding device 400 conveys the dust to the mixing device 500 for mixing.

[0036] For the above-mentioned powder drying dust recovery system 10, by controlling the closing of the slag discharge pipe 240 through the slag discharge valve 250, a closed gas path is formed between the drying device 100 and the slag discharge pipe 240, preventing cold air from entering the bag dust collector 220 through the slag discharge pipe 240, avoiding the generation of condensed water due to the contact between the drying water vapor and cold air. At the same time, the induced draft fan 230 timely draws away the water vapor generated in the drying device 100 from the bag dust collector 220, thus avoiding the agglomeration caused by the contact between the precursor dust and the condensed water, and further improving the blockage condition of the bag dust collector 220, reducing the work of cleaning and maintaining the bag dust collector 220; the drying water vapor is filtered through the bag dust collector 220, and the filtered precursor dust enters the buffer bin device 300 through the slag discharge pipe 240. The precursor dust is then conveyed to the mixing device 500 through the feeding device 400 for mixing, realizing the reuse of the precursor dust, reducing the waste of the precursor material during the production process, and improving the utilization rate of the precursor material; the precursor material circulates inside the powder drying dust recovery system, and the powder drying dust recovery system has good sealing performance, avoiding the risk of introducing foreign substances into the precursor material, reducing the waste of the precursor material during the slag discharge process, and thus reducing the production cost.

[0037] Such as Figure 2As shown, in one embodiment, the dust removal mechanism 200 further includes a water curtain dust removal tower 260. The air inlet of the water curtain dust removal tower 260 is connected to the air outlet of the bag dust collector 220, and the exhaust fan 230 is connected to the air outlet of the water curtain dust removal tower 260. In this embodiment, the drying water vapor contains particles. After the water vapor passes through the bag dust collector 220, most of the precursor dust particles in the water vapor are filtered, but the ultra-fine precursor dust can directly pass through the bag dust collector 220, so that the ultra-fine precursor dust is discharged after passing through the exhaust fan 230. The water curtain dust removal tower 260 can intercept the ultra-fine dust in the water vapor, avoiding the dust pollution caused by the ultra-fine dust. Moreover, the water curtain dust removal tower 260 can also cool the water vapor, making the temperature of the discharged water vapor lower, so that the process of discharging the water vapor is safer.

[0038] As Figure 2 shown, in one embodiment, the bag dust collector 220 includes a dust removal housing 221, an intercepting cloth bag 222 and a back-blowing assembly 223. The dust removal housing 221 is provided with an air passing channel 2201. The intercepting cloth bag 222 divides the air passing channel 2201 into a back-blowing channel 2202 on the air inlet end side of the intercepting cloth bag 222 and a collecting channel 2203 on the air outlet end side of the intercepting cloth bag 222. The back-blowing assembly 223 is installed in the dust removal housing 221, and the blowing end of the back-blowing assembly 223 is arranged in the back-blowing channel 2202. The other end of the air inlet pipe 210 is connected to the collecting channel 2203, the feed inlet of the slag discharge pipe 240 is connected to the collecting channel 2203, and the air inlet of the water curtain dust removal tower 260 is connected to the back-blowing channel 2202. In this embodiment, the intercepting cloth bag 222 filters the precursor dust carried in the water vapor. The filtered precursor dust adheres to the surface of the intercepting cloth bag 222. The blowing end of the back-blowing assembly 223 is arranged above the intercepting cloth bag 222. The blowing end of the back-blowing assembly 223 blows the inner wall of the intercepting cloth bag 222 from top to bottom, so that the precursor dust falls into the slag discharge pipe 240. The slag discharge valve 250 is closed to intercept the precursor dust in the slag discharge pipe 240. By blowing the intercepting cloth bag 222, it is prevented that the precursor dust clogs the intercepting cloth bag 222, thus ensuring the filtering effect of the intercepting cloth bag 222 on the water vapor.

[0039] As Figure 2As shown, in one embodiment, the dust removal mechanism 200 further includes a vibration component 270 and a backflush pipe 280. The vibration component 270 is installed on the slag discharge pipe 240, the backflush pipe 280 communicates with the slag discharge pipe 240, and the backflush pipe 280 is arranged between the slag discharge valve 250 and the bag dust collector 220. In this embodiment, the backflush pipe 280 communicates with the air compressor 290, and the air compressor 290 can blow air flow into the backflush pipe 280. When discharging materials after the slag discharge valve 250 is opened, the precursor dust adheres to the inner wall of the slag discharge pipe 240. The vibration component 270 vibrates the slag discharge pipe 240, and the vibration component can knock off the dust adhering to the slag discharge pipe 240, so that the precursor dust detaches from the inner wall of the slag discharge pipe 240 and enters the buffer bin device 300. The backflush pipe 280 can blow the slag discharge valve 250 and the slag discharge pipe 240, further preventing the precursor dust from adhering to the slag discharge pipe 240, thereby increasing the recovery amount of the precursor dust and avoiding the slag discharge pipe 240 being blocked by the precursor dust.

[0040] As Figure 3 shown, in one embodiment, the buffer bin device 300 includes a storage bin 310, a feeding hopper 320, a bracket 330, a feeding butterfly valve 340, a negative pressure conveying pipe 350 and a breather valve 360. The storage bin 310 and the feeding hopper 320 are both fixed on the bracket 330. The feeding butterfly valve 340 is arranged at the discharge port at the bottom of the feeding hopper 320. The outlet of the feeding hopper 320 communicates with the inlet of the storage bin 310. The inlet of the storage bin 310 communicates with the outlet of the slag discharge pipe 240. The outlet of the storage bin 310 communicates with one end of the negative pressure conveying pipe 350. The other end of the negative pressure conveying pipe 350 communicates with the inlet of the feeding device 400. The breather valve 360 is installed on the negative pressure conveying pipe 350. In this embodiment, the precursor material is placed on the feeding hopper 320 through a ton bag for discharging. When the feeding butterfly valve 340 is opened, the precursor material enters the storage bin 310 through the feeding hopper 320, and then the precursor material enters the feeding device 400 through the negative pressure conveying pipe 350. The breather valve 360 allows air to enter to maintain the air pressure balance in the negative pressure conveying pipe 350 and the storage bin 310, so that the feeding device 400 continuously conveys materials through the negative pressure conveying pipe 350. The high magnetic precursor material is the precursor material with a magnetic property Mi of 60 - 300 ppb generated abnormally in the production line, and needs to be re-screened and demagnetized. The high magnetic precursor material can enter the feeding device 400 for demagnetization treatment after passing through the feeding hopper 320, the storage bin 310 and the negative pressure conveying pipe 350 in sequence, so that the powder drying dust recovery system 10 can process high magnetic precursor materials with different magnetic contents.

[0041] As Figure 4As shown, in one embodiment, the feeding device 400 includes a feeding butterfly valve 410, a vacuum conveying assembly 420, a discharging air lock 430, a conveying and discharging pipe 440, and a first weighing assembly 450. The feeding port of the vacuum conveying assembly 420 is communicated with the discharging port of the buffer bin device 300. The feeding butterfly valve 410 is installed at the feeding port of the vacuum conveying assembly 420. The discharging air lock 430 is installed at the discharging port of the vacuum conveying assembly 420. One end of the conveying and discharging pipe 440 is communicated with the discharging air lock 430, and the other end of the conveying and discharging pipe 440 is communicated with the feeding port of the mixing device 500. The first weighing assembly 450 is installed outside the vacuum conveying assembly 420. In this embodiment, the feeding butterfly valve 410 can control the material to enter the vacuum conveying assembly 420. The discharging air lock 430 can control the precursor material to be fed continuously and evenly. The first weighing assembly 450 can detect the mass of the precursor material in the vacuum conveying assembly 420. When the first weighing assembly 450 measures that the weight of the precursor material is greater than 20 kg, the discharging air lock 430 is started, so that the precursor material is continuously sent to the mixing device 500. When the first weighing assembly 450 measures that the weight of the precursor material is less than 1 kg, the discharging air lock 430 is closed, so as to stop conveying the precursor material to the mixing device 500. By controlling the operation of the discharging air lock 430 through the mass of the precursor material, the running time of the discharging air lock 430 is reduced, thereby preventing the idling of the discharging air lock 430, and further saving the production energy consumption.

[0042] As Figure 4 shown, in one embodiment, the feeding device 400 further includes a first iron remover 460, and the first iron remover 460 is installed on the conveying and discharging pipe 440. In this embodiment, the first iron remover 460 is used to demagnetize the precursor material. The magnetic impurities of the precursor material passing through the conveying and discharging pipe 440 can be removed by the first iron remover 460, so that the magnetic impurities of the precursor material conveyed by the feeding device 400 to the mixing device 500 are less.

[0043] As Figure 4As shown, in one embodiment, the mixing device 500 includes a cylinder body 510, a stirring assembly 520, a drying feed pipe 530, and a second weighing assembly 540. The stirring assembly 520 is installed on the cylinder body 510, and the stirring end of the stirring assembly 520 is arranged inside the cylinder body 510. The drying material outlet 103 of the drying device 100 communicates with the feed port of the drying feed pipe 530. The first feed port of the cylinder body 510 is located on one side of the second feed port of the cylinder body 510. The drying feed pipe 530 communicates with the second feed port of the cylinder body 510. The feeding device 400 communicates with the first feed port of the cylinder body 510. The second weighing assembly 540 is arranged at the bottom of the cylinder body 510. In this embodiment, the cylinder body 510 is provided with a first feed port and a second feed port. The precursor material dried by the drying device 100 enters the cylinder body 510 through the drying feed pipe 530. The recovered dust material and rework material are conveyed into the cylinder body 510 through the feeding device 400. When the stirring assembly 520 is started, the materials in the cylinder body 510 are stirred and mixed. The second weighing assembly 540 can detect the mass of the materials in the cylinder body 510. By controlling the amount of materials conveyed into the cylinder body 510, it is prevented that there is too much material in the cylinder body 510, so that the materials in the cylinder body 510 are mixed more evenly.

[0044] As Figure 4 shown, in one embodiment, the mixing device 500 further includes a second iron remover 550. The second iron remover 550 is installed on the drying feed pipe 530. In this embodiment, the second iron remover 550 is used to demagnetize the materials. Through the second iron remover 550, the magnetic impurities of the precursor materials passing through the drying feed pipe 530 can be removed, so that the drying device 100 adds less magnetic impurities to the mixing device 500 through the drying feed pipe 530, and further improves the finished product quality of the precursor materials.

[0045] As Figure 1 and Figure 4 shown, in one embodiment, the powder drying dust recovery system 10 further includes a screening and iron removal device 600 and a packaging device 700. The feed port of the screening and iron removal device 600 communicates with the discharge port at the bottom of the cylinder body 510. The packaging device 700 is arranged behind the screening and iron removal device 600. In this embodiment, when the materials in the cylinder body 510 are mixed evenly and enter the screening and iron removal device 600, the material precursors enter the packaging device 700 from the screening and iron removal device 600. The packaging device 700 packages the precursor materials. Through the screening and iron removal device 600, the magnetic impurities in the material precursors can be removed, so that the precursor materials obtained by the packaging device 700 have less magnetic impurities and higher quality.

[0046] Furthermore, the powder drying dust recovery system 10 can reprocess the high-magnetic precursor material with a large amount of magnetic foreign matter. The high-magnetic precursor material can be discharged from the feeding hopper 320. After the high-magnetic precursor material enters the silo 310, it is conveyed through the feeding device 400. The first iron remover 460 of the feeding device 400 first demagnetizes the high-magnetic precursor material once. The high-magnetic precursor material enters the mixing device 500 from the feeding device 400 for mixing, and then the high-magnetic precursor material enters the screening and iron removal device 600 from the mixing device 500. The screening and iron removal device 600 screens and demagnetizes the high-magnetic precursor material, so that the content of magnetic foreign matter in the demagnetized high-magnetic precursor material is less, and the operation of reprocessing the high-magnetic material is simple.

[0047] Compared with the prior art, the present disclosure has at least the following advantages:

[0048] 1. For the above-mentioned powder drying dust recovery system 10, by controlling the closing of the slag discharge valve 250 of the slag discharge pipe 240, a closed gas path is formed between the drying device 100 and the slag discharge pipe 240, preventing cold air from entering the bag dust collector 220 through the slag discharge pipe 240, avoiding the contact between the drying water vapor and the cold air to generate condensed water. At the same time, the induced draft fan 230 timely extracts the water vapor generated in the drying device 100 from the bag dust collector 220, thereby avoiding the hardening caused by the contact between the precursor dust and the condensed water, and then improving the blockage condition of the bag dust collector 220 and reducing the work of cleaning and maintaining the bag dust collector 220;

[0049] 2. The drying water vapor is filtered through the bag dust collector 220, and the filtered precursor dust enters the buffer bin device 300 through the slag discharge pipe 240. The precursor dust is then conveyed to the mixing device 500 through the feeding device 400 for mixing, realizing the reuse of the precursor dust, reducing the waste of the precursor material in the production process, and improving the utilization rate of the precursor material;

[0050] 3. The precursor material flows inside the powder drying dust recovery system, making the powder drying dust recovery system have good airtightness, avoiding the risk of introducing foreign matter into the precursor material, reducing the waste of the precursor material during the slag discharge process, and thus reducing the production cost.

[0051] 4. When the high-magnetic precursor material is reprocessed, the high-magnetic precursor material can be discharged from the blanking hopper 320 into the storage bin 310, and the high-magnetic precursor material in the storage bin 310 is conveyed to the mixing device 500 through the feeding device 400. The first iron remover 460 of the feeding device 400 first demagnetizes the high-magnetic precursor material, and then the high-magnetic precursor material is mixed into the screening and iron removal device 600 from the mixing device 500. The screening and iron removal device 600 screens and demagnetizes the high-magnetic precursor material, so that the content of magnetic foreign matters in the demagnetized high-magnetic precursor material is small, and the operation of reprocessing the high-magnetic material is simple.

[0052] The above embodiments only represent several implementation manners of the present disclosure. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the disclosed patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several deformations and improvements can be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure patent shall be subject to the appended claims.

Claims

1. A powder drying dust recovery system, characterized in that, It includes a drying device (100), a dust removal mechanism (200), a buffer bin device (300), a feeding device (400) and a mixing device (500). The drying device (100) is provided with a material drying inlet (101), an exhaust gas outlet (102) and a material drying outlet (103). The dust removal mechanism (200) includes an intake pipe (210), a bag dust collector (220), a suction fan (230), a slag discharge pipe (240) and a slag discharge valve (250). One end of the intake pipe (210) is connected to the exhaust gas outlet (102), the other end of the intake pipe (210) is connected to the air inlet of the bag dust collector (220), the suction fan (230) is connected to the air outlet of the bag dust collector (220), the feed inlet of the slag discharge pipe (240) is connected to the slag discharge port of the bag dust collector (220), and the slag discharge valve (250) is installed on the slag discharge pipe (240). The feed inlet of the buffer bin device (300) is connected to the discharge outlet of the slag discharge pipe (240), the feed inlet of the feeding device (400) is connected to the discharge outlet of the buffer bin device (300). The first feed inlet of the mixing device (500) is located on one side of the second feed inlet of the mixing device (500). The first feed inlet of the mixing device (500) is connected to the discharge outlet of the feeding device (400), and the second feed inlet of the mixing device (500) is connected to the material drying outlet (103).

2. The powder drying dust recovery system according to claim 1, characterized in that, The dust removal mechanism (200) further includes a water curtain dust removal tower (260). The air inlet of the water curtain dust removal tower (260) is connected to the air outlet of the bag dust collector (220), and the suction fan (230) is connected to the air outlet of the water curtain dust removal tower (260).

3. The powder drying dust recovery system according to claim 2, wherein The bag dust collector (220) includes a dust removal housing (221), an intercepting cloth bag (222) and a back blowing assembly (223). The dust removal housing (221) is provided with an air passing channel (2201). The intercepting cloth bag (222) divides the air passing channel (2201) into a back blowing channel (2202) on the side of the air inlet end of the intercepting cloth bag (222) and a collecting channel (2203) on the side of the air outlet end of the intercepting cloth bag (222). The back blowing assembly (223) is installed on the dust removal housing (221), and the blowing end of the back blowing assembly (223) is arranged in the back blowing channel (2202). The other end of the intake pipe (210) is connected to the collecting channel (2203), the feed inlet of the slag discharge pipe (240) is connected to the collecting channel (2203), and the air inlet of the water curtain dust removal tower (260) is connected to the back blowing channel (2202).

4. The powder drying dust recovery system according to claim 1, characterized in that The dust removal mechanism (200) further includes a vibration component (270) and an anti-blowing pipe (280). The vibration component (270) is installed on the slag discharge pipe (240), and the anti-blowing pipe (280) is communicated with the slag discharge pipe (240). The anti-blowing pipe (280) is arranged between the slag discharge valve (250) and the bag dust collector (220).

5. The powder drying dust recovery system according to claim 1, characterized in that The buffer bin device (300) includes a bin (310), a blanking hopper (320), a bracket (330), a blanking butterfly valve (340), a negative pressure conveying pipe (350), and a breathing valve (360). The bin (310) and the blanking hopper (320) are both fixed to the bracket (330). The discharge port of the blanking hopper (320) is communicated with the feed port of the bin (310). The blanking butterfly valve (340) is arranged at the outlet of the blanking hopper (320). The feed port of the bin (310) is communicated with the discharge port of the slag discharge pipe (240). The discharge port of the bin (310) is communicated with one end of the negative pressure conveying pipe (350). The other end of the negative pressure conveying pipe (350) is communicated with the feed port of the feeding device (400). The breathing valve (360) is installed on the negative pressure conveying pipe (350).

6. The powder drying dust recovery system according to claim 1, characterized in that, The feeding device (400) includes a feed butterfly valve (410), a vacuum conveying component (420), a blanking air lock (430), a conveying discharge pipe (440), and a first weighing component (450). The feed port of the vacuum conveying component (420) is communicated with the discharge port of the buffer bin device (300). The feed butterfly valve (410) is installed at the feed port of the vacuum conveying component (420). The blanking air lock (430) is installed at the discharge port of the vacuum conveying component (420). One end of the conveying discharge pipe (440) is communicated with the blanking air lock (430). The other end of the conveying discharge pipe (440) is communicated with the feed port of the mixing device (500). The first weighing component (450) is installed outside the vacuum conveying component (420).

7. The powder drying dust recovery system according to claim 6, wherein The feeding device (400) further includes a first iron remover (460). The first iron remover (460) is installed on the conveying discharge pipe (440).

8. The powder drying dust recovery system according to claim 1, characterized in that The mixing device (500) includes a cylinder body (510), a stirring assembly (520), a drying feed pipe (530), and a second weighing assembly (540). The stirring assembly (520) is installed on the cylinder body (510), and the stirring end of the stirring assembly (520) is disposed inside the cylinder body (510). The drying material outlet (103) of the drying device (100) is communicated with the feed inlet of the drying feed pipe (530). The first feed inlet of the cylinder body (510) is located on one side of the second feed inlet of the cylinder body (510). The other end of the drying feed pipe (530) is communicated with the second feed inlet of the cylinder body (510). The discharge outlet of the feeding device (400) is communicated with the first feed inlet of the cylinder body (510). The second weighing assembly (540) is installed at the bottom of the cylinder body (510).

9. The powder drying dust recovery system according to claim 8, characterized in that, The mixing device (500) further includes a second iron remover (550), and the second iron remover (550) is installed on the drying feed pipe (530).

10. The powder drying dust recovery system according to claim 8, characterized in that, The powder drying dust recovery system further includes a screening and iron removal device (600) and a packaging device (700). The feed inlet of the screening and iron removal device (600) is communicated with the discharge outlet at the bottom of the cylinder body (510). The packaging device (700) is disposed behind the screening and iron removal device (600).

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