Slurry filtration and transport system

Abstract

Provided in the present application is a slurry filtration and transport system, comprising a slurry preparation apparatus, a treatment apparatus and a storage apparatus, wherein the treatment apparatus comprises a filtration device and a transport device, which comprises a liquid intake assembly, a liquid output assembly and a recovery assembly, the liquid intake assembly communicating the slurry preparation apparatus with the filtration device, the liquid output assembly communicating the storage apparatus with the filtration device, and the recovery assembly communicating the filtration device with the storage apparatus. The slurry filtration and transport system of the present application allows a slurry remaining in the filtration device to enter the recovery assembly and then be collected in the storage apparatus, thereby reducing slurry residue in the filtration device, and avoiding the waste of residual slurry and improving the yield of the slurry.

Description

Slurry filtration and transportation system

[0001] The present application claims priority to the Chinese patent application No. 202421949099.5, filed on August 13, 2024, and entitled "Slurry filtration and transportation system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to, but is not limited to, the technical field of battery production, and in particular to a slurry filtration and transportation system. BACKGROUND

[0003] The production of lithium batteries involves a slurry preparation process, which aims to obtain lithium battery slurry. After the surface of the current collector is coated with lithium battery slurry, a pole roll is obtained. The slurry prepared by the slurry preparation device needs to be filtered and transported to the storage device. The problem of slurry filtration and transportation operation is that there is residual slurry in the filtration device. The residual slurry is difficult to clean after a long time of accumulation, and mixing with newly prepared slurry will lead to poor coating quality on the surface of the pole roll. The current countermeasure is to manually clean the filtration device to remove the accumulated slurry when the slurry filtration and transportation operation is stopped. Manual cleaning affects production efficiency and increases the workload. SUMMARY

[0004] In view of this, the present application provides a slurry filtration and transportation system capable of reducing residual slurry in the filtration device and recycling the residual slurry.

[0005] The slurry filtration and transportation system provided by the present application includes a slurry preparation device, a treatment device, and a storage device. The treatment device includes a filtration device and a transportation device. The transportation device includes a liquid inlet assembly, a liquid outlet assembly, and a recovery assembly. The liquid inlet assembly is connected to the slurry preparation device and the filtration device. The liquid outlet assembly is connected to the storage device and the filtration device. The recovery assembly is connected to the filtration device and the storage device.

[0006] The slurry filtration and transportation system of the present application allows the slurry remaining in the filtration device to enter the recovery assembly and then be collected in the storage device, reducing the residual slurry in the filtration device and reducing the waste of residual slurry, thereby improving the yield of slurry.

[0007] In some embodiments, the transportation device further includes a communication pipe, the slurry preparation device and the storage device are respectively connected to two ends of the communication pipe, the communication pipe includes at least one set of pipe connection part, the pipe connection part includes a liquid inlet part, a recovery part, and a liquid outlet part arranged in sequence, and the liquid inlet assembly, the recovery assembly, and the liquid outlet assembly are respectively connected to the liquid inlet part, the recovery part, and the liquid outlet part.

[0008] In some embodiments, the transport device further comprises at least one set of pipe valves, each pipe valve corresponding to one of the pipe connection sections, each pipe valve comprising a first valve and a second valve, the first valve being disposed between the corresponding liquid inlet section and the liquid recovery section, and the second valve being disposed between the corresponding liquid recovery section and the liquid outlet section.

[0009] In some embodiments, the filter device further comprises a container having a surplus discharge opening, and the recovery assembly comprises a recovery pipe connecting the surplus discharge opening and the liquid recovery section.

[0010] In some embodiments, the recovery assembly further comprises a recovery valve disposed in the recovery pipe.

[0011] In some embodiments, the communication pipe comprises two sets of pipe connection sections arranged in sequence, the filter device comprises a rotary filter and a filter de-ironer, the liquid inlet assembly comprises a first liquid inlet pipe and a second liquid inlet pipe, the liquid outlet assembly comprises a first liquid outlet pipe and a second liquid outlet pipe, and the recovery assembly comprises a first recovery pipe and a second recovery pipe,

[0012] The first liquid inlet pipe and the first liquid outlet pipe are connected to the rotary filter, and are connected to the liquid inlet section and the liquid outlet section of the first set of pipe connection sections, respectively.

[0013] The second liquid inlet pipe and the second liquid outlet pipe are connected to the filter de-ironer, and are connected to the liquid inlet section and the liquid outlet section of the second set of pipe connection sections, respectively.

[0014] The first recovery pipe is connected to the rotary filter and the liquid recovery section of the first set of pipe connection sections, and the second recovery pipe is connected to the filter de-ironer and the liquid recovery section of the second set of pipe connection sections.

[0015] In some embodiments, the filter de-ironer, the second liquid inlet pipe and the second liquid outlet pipe are each configured as two, and the second recovery pipe is configured as two sets, the two filter de-ironers being arranged in parallel.

[0016] In some embodiments, the processing device further comprises a pushing device, and the communication pipe further comprises a first connection section and a second connection section, the first connection section, the second connection section and the pipe connection sections being arranged in sequence, the first connection section being connected to the pulping device, and the second connection section being connected to the pushing device.

[0017] In some embodiments, the processing device further comprises a recovery device, and the communication pipe further comprises a third connection section and a fourth connection section, the second connection section, the pipe connection sections, the third connection section and the fourth connection section being arranged in sequence, the third connection section being connected to the recovery device, and the fourth connection section being connected to the storage device.

[0018] In some embodiments, the transport device further comprises a third valve and a fourth valve, the third valve being disposed between the second connection section and the pushing device, and the fourth valve being disposed between the third connection section and the recovery device.

[0019] The above is a summary of the subject matter described in detail in this document. This summary is not intended to limit the scope of protection of the claims. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0021] Figure 1 is a schematic diagram of the slurry filtration and transportation system of Embodiment 1 of this application;

[0022] Figure 2 is a partial schematic diagram of the slurry filtration and transport system shown in Figure 1;

[0023] Figure 3 is a schematic diagram of the slurry filtration and transportation system of Embodiment 2 of this application.

[0024] Reference numerals: 10. Pulping equipment; 20. Filtration device; 21. Rotary filter; 22. Filtration iron remover; 31. Inlet assembly; 311. First inlet pipe; 312. Second inlet pipe; 313. First inlet valve; 314. Second inlet valve; 32. Outlet assembly; 321. First outlet pipe; 322. Second outlet pipe; 323. First outlet valve; 324. Second outlet valve; 33. Recovery assembly; 331. First recovery pipe; 332. Second recovery pipe; 333. First recovery tube. 334. Second recovery valve; 34. Connecting pipe; 341. First connection part; 342. Second connection part; 343. Liquid inlet part; 344. Recovery part; 345. Liquid outlet part; 346. Third connection part; 347. Fourth connection part; 351. First valve; 352. Second valve; 353. Third valve; 354. Fourth valve; 355. Fifth valve; 356. Sixth valve; 36. Connecting pipe; 40. Propulsion device; 50. Recovery device; 60. Storage equipment; 70. Diaphragm pump.

[0025] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0028] The present application provides a slurry filtration and transportation system, which can be used to filter and transport lithium battery slurries, and can also be used to filter and transport other types of slurries in addition to lithium battery slurries. The composition and working principle of the slurry filtration and transportation system of the present application will be described below with reference to the homogenization process of lithium battery slurries, and the application of the slurry filtration and transportation system in other slurry processing processes will not be described again.

[0029] Referring to FIGS. 1 and 3, the slurry filtration and transportation system of the present application includes a slurry preparation device 10, a processing device and a storage device 60. The slurry preparation device 10 is used to prepare slurries. The processing device includes a filtration device 20 and a transportation device. The transportation device is responsible for transporting the slurry from the slurry preparation device 10 to the filtration device for filtration by the filtration device 20. The filtered slurry is transported by the transportation device into the storage device 60. The storage device 60 is used to store the slurry and supply the slurry for the electrode roll coating process.

[0030] Referring to FIGS. 1-2, the transportation device includes a liquid inlet assembly 31 and a liquid outlet assembly 32. The liquid inlet assembly 31 has a liquid inlet flow channel that communicates the slurry preparation device 10 and the filtration device 20. The liquid outlet assembly 32 has a liquid outlet flow channel that communicates the storage device 60 and the filtration device 20. The filtration device 20 includes a filter and a container that contains the filter. The slurry from the slurry preparation device 10 can flow into the container along the liquid inlet flow channel. The slurry can flow into the storage device 60 along the liquid outlet flow channel after being impurity-removed by the filter.

[0031] In some embodiments, the liquid inlet assembly 31 includes a liquid inlet pipe connected to the container and a liquid inlet valve arranged on the liquid inlet pipe. The liquid outlet assembly 32 includes a liquid outlet pipe connected to the container and a liquid outlet valve arranged on the liquid outlet pipe. The liquid inlet pipe is used to form the liquid inlet flow channel, and the liquid outlet pipe is used to form the liquid outlet flow channel. The liquid inlet flow channel communicates the inner cavity of the container and the inside of the slurry preparation device 10. The liquid outlet flow channel communicates the inner cavity of the container and the inside of the storage device 60. The liquid inlet valve is used to control the opening and blocking of the liquid inlet flow channel. The liquid outlet valve is used to control the opening and blocking of the liquid outlet flow channel.

[0032] Optionally, the filtering device 20 is configured in multiple, referring to FIG. 1-2, the multiple filtering devices 20 are divided into a rotary filter 21 and a filter de-ironer 22 according to filtering principles, the liquid inlet pipe includes a first liquid inlet pipe 311 and a second liquid inlet pipe 312, the liquid outlet pipe includes a first liquid outlet pipe 321 and a second liquid outlet pipe 322, the first liquid inlet pipe 311 and the second liquid inlet pipe 312 are connected with the rotary filter 21 and the filter de-ironer 22 respectively, and form a first liquid inlet flow channel and a second liquid inlet flow channel respectively, the first liquid outlet pipe 321 and the second liquid outlet pipe 322 are connected with the rotary filter 21 and the filter de-ironer 22 respectively, and form a first liquid outlet flow channel and a second liquid outlet flow channel respectively. The first liquid inlet flow channel is communicated with the container of the rotary filter 21, and the first liquid outlet flow channel is communicated with the container of the rotary filter 21; the second liquid inlet flow channel is communicated with the container of the filter de-ironer 22, and the second liquid outlet flow channel is communicated with the container of the filter de-ironer 22.

[0033] Optionally, referring to FIG. 2, the liquid inlet valve includes a first liquid inlet valve 313 arranged on the first liquid inlet pipe 311 and a second liquid inlet valve 314 arranged on the second liquid inlet pipe 312, and the liquid outlet valve includes a first liquid outlet valve 323 arranged on the first liquid outlet pipe 321 and a second liquid outlet valve 324 arranged on the second liquid outlet pipe 322. The first liquid inlet valve 313 is used to control the first liquid inlet flow channel to switch between the open and blocked states, the first liquid outlet valve 323 is used to control the first liquid outlet flow channel to switch between the open and blocked states, the second liquid inlet valve 314 is used to control the second liquid inlet flow channel to switch between the open and blocked states, and the second liquid outlet valve 324 is used to control the second liquid outlet flow channel to switch between the open and blocked states.

[0034] In some embodiments, the conveying device further includes a connecting pipe 34, the connecting pipe 34 has a conveying flow channel, the pulp preparation device 10 and the storage device 60 are connected to two ends of the connecting pipe 34 respectively, and are communicated through the conveying flow channel. The connecting pipe 34 includes at least one set of pipe sections, each set of pipe sections includes a liquid inlet section 343 and a liquid outlet section 345, the liquid inlet section 343 and the liquid outlet section 345 are arranged in sequence along the extension direction of the conveying flow channel, and the liquid inlet assembly 31 and the liquid outlet assembly 32 are connected to the liquid inlet section 343 and the liquid outlet section 345 respectively. The extension direction of the conveying flow channel is defined as the direction in which the slurry flows in the connecting pipe 34 and away from the pulp preparation device 10 and close to the storage device 60.

[0035] Optionally, referring to FIGS. 1-3, the communication pipe 34 extends from the pulping device 10 to the processing device, and then from the processing device to the storage device 60, and comprises two sets of pipe connection sections. In the extension direction of the transportation flow channel, the liquid inlet section 343 of the first set of pipe connection sections, the liquid outlet section 345 of the first set of pipe connection sections, the liquid inlet section 343 of the second set of pipe connection sections, and the liquid outlet section 345 of the second set of pipe connection sections are arranged in sequence. The two ends of the first liquid inlet pipe 311 are respectively connected to the liquid inlet section 343 of the first set of pipe connection sections and the rotary filter 21, the two ends of the first liquid outlet pipe 321 are respectively connected to the liquid outlet section 345 of the first set of pipe connection sections and the rotary filter 21, the two ends of the second liquid inlet pipe 312 are respectively connected to the liquid inlet section 343 of the second set of pipe connection sections and the filter de-ironing device 22, and the two ends of the second liquid outlet pipe 322 are respectively connected to the liquid outlet section 345 of the second set of pipe connection sections and the filter de-ironing device 22.

[0036] In this way, the slurry from the pulping device 10 can flow along the communication pipe 34 to the liquid inlet section 343 of the first set of pipe connection sections, and then flow into the rotary filter 21 through the first liquid inlet pipe 311. After being filtered in the rotary filter 21, the slurry flows along the first liquid outlet pipe 321 to the liquid outlet section 345 of the first set of pipe connection sections, and then flows along the communication pipe 34 to the liquid inlet section 343 of the second set of pipe connection sections. After that, the slurry flows into the filter de-ironing device 22 through the second liquid inlet pipe 312. After being filtered again in the filter de-ironing device 22, the slurry flows along the second liquid outlet pipe 322 to the liquid outlet section 345 of the second set of pipe connection sections, and finally flows along the communication pipe 34 to the storage device 60.

[0037] Optionally, as shown in the slurry filtration and transportation system of FIG. 3, the filter de-ironing device 22 is configured as two, the second liquid inlet pipe 312 and the second liquid outlet pipe 322 are each configured as two, the liquid inlet section 343 of the second set of pipe connection sections is connected to the two second liquid inlet pipes 312, the liquid outlet section 345 of the second set of pipe connection sections is connected to the two second liquid outlet pipes 322, one of the second liquid inlet pipes 312 and one of the second liquid outlet pipes 322 are connected to one of the filter de-ironing devices 22, and the other second liquid inlet pipe 312 and the other second liquid outlet pipe 322 are connected to the other filter de-ironing device 22. The two filter de-ironing devices 22 are arranged in parallel.

[0038] In this way, the two filter de-ironing devices 22 back up each other. When one of the filter de-ironing devices 22 fails, is temporarily suspended for use, or is subjected to cleaning, the other filter de-ironing device 22 can still continue to operate, thereby ensuring that the filtration and transportation operation of the slurry does not have to be forced to be interrupted.

[0039] In some embodiments, the processing device further comprises a propelling device 40 having a propelling channel, the communicating pipe 34 comprises a first connecting part 341 and a second connecting part 342, the first connecting part 341 and the second connecting part 342 are arranged in sequence along the extension direction of the transportation flow channel, the first connecting part 341 is connected with the pulping device 10 to make the interior of the pulping device 10 communicate with the transportation flow channel, and the second connecting part 342 is connected with the propelling device 40 to make the propelling channel communicate with the transportation flow channel. The propelling device 40 can generate a propelling airflow for cleaning the residual pulp in the communicating pipe 34 after being started, the propelling airflow enters the transportation flow channel from the propelling channel, and then flows along the transportation flow channel and gradually approaches the storage device 60, and the residual pulp in the transportation flow channel is pushed into the storage device 60 under the propelling force of the propelling airflow.

[0040] In this way, not only the residual pulp in the transportation flow channel can be cleaned, the residual pulp can be prevented from accumulating in the transportation flow channel for a long time and being difficult to clean, and the residual pulp and the newly prepared pulp can be prevented from mixing to affect the quality of the pulp, but also the residual pulp in the transportation flow channel can be recycled, and the yield of the pulp is improved.

[0041] Referring to FIGS. 1 and 3, in some embodiments, the transportation device further comprises a diaphragm pump 70, one end of the diaphragm pump 70 is connected with the pulping device 10 through a pipeline, and the other end of the diaphragm pump 70 is connected with the first connecting part 341 of the communicating pipe 34. The diaphragm pump 70 is used to pump the pulp prepared by the pulping device 10 into the communicating pipe 34, so that the filtering device 20 obtains the pulp from the pulping device 10, and after the filtering device 20 completes the filtration of the pulp, the pulp flows into the communicating pipe 34 again under the driving of the diaphragm pump 70 and finally flows into the storage device 60.

[0042] Optionally, the processing device further comprises a push ball, the initial position of the push ball is located in the propelling device 40, and the propelling device 40 can be started to generate the propelling airflow after the filtering device 20 completes the filtration of the pulp. After the propelling device 40 is started, the push ball enters the transportation flow channel from the propelling channel under the propelling force of the propelling airflow, the surface of the push ball is in sliding fit with the inner wall surface of the transportation flow channel, and therefore the residual pulp can be scraped off from the inner wall surface of the transportation flow channel by the push ball, and the cleaning effect of the transportation flow channel is improved.

[0043] Optionally, referring to FIG. 1 and FIG. 3, the processing device further comprises a recycling device 50 having a recycling channel, and the communication pipe 34 further comprises a third connecting portion 346 and a fourth connecting portion 347. The first connecting portion 341, the second connecting portion 342, the third connecting portion 346 and the fourth connecting portion 347 are arranged in sequence along the extension direction of the transportation flow channel, the third connecting portion 346 is connected to the recycling device 50 to make the recycling channel communicate with the transportation flow channel, and the fourth connecting portion 347 is connected to the storage device 60 to make the interior of the storage device 60 communicate with the transportation flow channel. The push ball passes through the propulsion channel, the second connecting portion 342, the first group of pipe connecting portions, the second group of pipe connecting portions, the third connecting portion 346 in sequence under the action of the propulsion force of the propulsion airflow, and enters the recycling channel, so that the recycling device 50 recycles the push ball, and the push ball can be reused after being cleaned again and put into the propulsion device 40.

[0044] In view of the fact that the slurry is prone to be left in the filtering device, the slurry filtering and transporting system limits that the transporting device further comprises a recycling assembly 33 having a recycling flow channel communicating with the filtering device 20 and the storage device 60. In this way, even if a part of the slurry is left in the filtering device 20 after being filtered by the filter, the left slurry can still be recycled by the recycling assembly 33 and then be sent to the storage device 60, which reduces the waste of the left slurry, improves the yield of the slurry, prevents the difficulty in cleaning the interior of the filtering device 20 caused by the long-term left slurry in the filtering device 20, and avoids the problem of the quality of the slurry being reduced caused by the mixing of the newly made slurry and the slurry left in the filtering device.

[0045] Specifically, referring to FIG. 1 to FIG. 3, in some embodiments, each group of pipe connecting portions further comprises a recycling portion 344 between the liquid inlet portion 343 of the group of pipe connecting portions and the liquid outlet portion 345 of the group of pipe connecting portions, the container of the filtering device 20 comprises a liquid inlet, a liquid outlet and a residual material discharge port, the liquid inlet pipe is connected to the liquid inlet, the liquid outlet pipe is connected to the liquid outlet, and the recycling assembly 33 comprises a recycling pipe having a recycling flow channel, two ends of the recycling pipe are respectively connected to the residual material discharge port and the recycling portion 344. In this way, the interior of the container of the filtering device 20 communicates with the transportation flow channel of the communication pipe 34 through the recycling flow channel, when most of the slurry flows into the liquid outlet pipe through the liquid outlet, the slurry left in the container can enter the recycling pipe from the residual material discharge port, then enter the transportation flow channel from the recycling pipe, and finally flow into the storage device 60 together with the slurry flowing into the transportation flow channel through the liquid outlet pipe.

[0046] It can be understood that in other embodiments, the other end of the recycling pipe relatively far away from the residual material discharge port can be directly connected to the liquid outlet pipe to make the recycling flow channel directly communicate with the liquid outlet flow channel, or the other end of the recycling pipe relatively far away from the residual material discharge port can be directly connected to the storage device 60 to make the recycling flow channel directly communicate with the interior of the storage device 60, so that the slurry left in the container can also be cleaned and recycled.

[0047] In some embodiments, the liquid inlet portion 343, the recovery portion 344 and the liquid outlet portion 345 are sequentially arranged along the extension direction of the transportation flow channel. Referring to FIGS. 1-3, the recovery pipe includes a first recovery pipe 331 and a second recovery pipe 332. Along the extension direction of the transportation flow channel, the liquid inlet portion 343 of the first group of pipe connection portions, the recovery portion 344 of the first group of pipe connection portions, the liquid outlet portion 345 of the first group of pipe connection portions, the liquid inlet portion 343 of the second group of pipe connection portions, the recovery portion 344 of the second group of pipe connection portions and the liquid outlet portion 345 of the second group of pipe connection portions are sequentially arranged. The first recovery pipe 331 is connected to the excess material discharge port of the rotary filter 21 and the recovery portion 344 of the first group of pipe connection portions. The second recovery pipe 332 is connected to the excess material discharge port of the filter de-ironing device 22 and the recovery portion 344 of the second group of pipe connection portions.

[0048] In this way, the slurry remaining in the rotary filter 21 and the slurry remaining in the filter de-ironing device 22 can flow into the communication pipe 34 through the first recovery pipe 331 and the second recovery pipe 332, respectively. These residual slurries can eventually flow into the storage device 60. The rotary filter 21 and the filter de-ironing device 22 can be effectively cleaned, and the residual slurry can be prevented from mixing with the newly prepared slurry.

[0049] Alternatively, the excess material discharge port is arranged at the bottom of the container closest to the ground. In this way, the slurry remaining in the container of the filter device 20 can automatically flow into the recovery pipe by gravity. Therefore, the residual slurry in the container can be more easily emptied and cleaned, and the recovery efficiency and convenience of the residual slurry are improved.

[0050] In other embodiments, the recovery assembly 33 further includes a discharge promoting propeller. The discharge promoting propeller includes a gas flow output channel connected to the recovery pipe. The discharge promoting propeller can generate a gas pressure higher than that of the recovery flow channel. After the discharge promoting propeller is started, a discharge promoting gas flow can be generated. The discharge promoting gas flow enters the recovery pipe along the gas flow output channel and promotes the residual slurry in the recovery pipe to flow faster into the transportation flow channel. Therefore, the discharge promoting propeller can improve the cleaning and recovery efficiency of the residual slurry.

[0051] As shown in the slurry filtration and transportation system of FIG. 1, the number of filter de-ironing devices 22 is multiple. Referring to FIG. 2, the transportation device further includes at least one string pipe 36. The multiple filter de-ironing devices are connected in series through the string pipe 36 to form a filter de-ironing queue. One end of each string pipe 36 is connected to the liquid outlet of one filter de-ironing device 22. The other end of each string pipe 36 is connected to the liquid inlet of another filter de-ironing device 22. The second liquid inlet pipe 312 is connected to the liquid inlet of the filter de-ironing device 22 located at the head end of the filter de-ironing queue. The second liquid outlet pipe 322 is connected to the liquid outlet of the filter de-ironing device 22 located at the tail end of the filter de-ironing queue. The number of second recovery pipes 332 is equal to the number of filter de-ironing devices 22. The multiple filter de-ironing devices 22 are connected to the multiple second recovery pipes 332 one by one through the respective excess material discharge ports.

[0052] Optionally, the second group of connecting pipe sections includes a plurality of recovery sections 344 arranged in sequence along the extension direction of the conveying flow channel, and the plurality of recovery sections 344 of the second group of connecting pipe sections corresponds to the number of the second recovery pipes 332, and the plurality of second recovery pipes 332 and the plurality of recovery sections 344 of the second group of connecting pipe sections are connected one by one in correspondence.

[0053] In this way, the slurry can pass through the plurality of filter de-ironing devices 22 for multiple times of filtration, and the iron scraps in the slurry can be cleaned more thoroughly.

[0054] As shown in the slurry filtration and conveying system in FIG. 3, the second recovery pipes 332 are configured in two groups, one group of the second recovery pipes 332 connecting one of the filter de-ironing devices 22 and the recovery sections 344 of the second group of connecting pipe sections, and the other group of the second recovery pipes 332 connecting the other filter de-ironing device 22 and the recovery sections 344 of the second group of connecting pipe sections. In this way, the slurry remaining in the two filter de-ironing devices 22 can be cleaned and recovered.

[0055] Optionally, the recovery assembly 33 further includes a recovery valve arranged in the recovery pipe, and the recovery valve is used to control the recovery flow channel to switch between the unblocked state and the blocked state. Referring to FIG. 2, the recovery valve includes a first recovery valve 333 and a second recovery valve 334, the first recovery valve 333 is arranged in the first recovery pipe 331, the second recovery valve 334 is arranged in the second recovery pipe 332, the first recovery valve 333 is used to control the recovery flow channel of the first recovery pipe 331 to switch between the unblocked state and the blocked state, and the second recovery valve 334 is used to control the recovery flow channel of the second recovery pipe 332 to switch between the unblocked state and the blocked state. The recovery valve can be a manual valve which is manually controlled to open and close, or an automatic valve which is automatically controlled to open and close.

[0056] Optionally, for the slurry filtration and conveying system shown in FIG. 3, the second recovery valve 334 is configured in two groups, one group of the second recovery valve 334 is arranged in one group of the second recovery pipes 332, and the other group of the second recovery valve 334 is arranged in the other group of the second recovery pipes 332, and each group of the second recovery valve 334 can be controlled independently, that is, the opening and closing states of the two groups of the second recovery valve 334 are independent of each other and do not affect each other.

[0057] Optionally, the recovery valve includes a first valve port and a second valve port, and the connection mode between the recovery assembly 33, the filtration device 20 and the communicating pipe 34 can adopt the following modes: ① the first valve port is connected to the excess material discharge port of the filtration device 20, the second valve port is connected to one end of the recovery pipe, and the other end of the recovery pipe is connected to the recovery section 344 of the communicating pipe 34; ② the recovery pipe includes a first pipe section and a second pipe section, the two ends of the first pipe section are respectively connected to the excess material discharge port of the filtration device 20 and the first valve port, and the two ends of the second pipe section are respectively connected to the second valve port and the recovery section 344 of the communicating pipe 34; ③ the excess material discharge port of the filtration device 20 is connected to one end of the recovery pipe, the other end of the recovery pipe is connected to the first valve port, and the second valve port is connected to the recovery section 344 of the communicating pipe 34.

[0058] In some embodiments, the first connecting portion 341, the second connecting portion 342, the liquid inlet portion 343 of the first group of connecting portions, the recovery portion 344 of the first group of connecting portions, the liquid outlet portion 345 of the first group of connecting portions, the liquid inlet portion 343 of the second group of connecting portions, the recovery portion 344 of the second group of connecting portions, the liquid outlet portion 345 of the second group of connecting portions, the third connecting portion 346 and the fourth connecting portion 347 are sequentially arranged along the extension direction of the transportation flow channel. Referring to FIGS. 1 and 3, the transportation device further comprises two groups of pipe valves arranged in the communication pipe 34, a first group of pipe valves corresponding to the first group of connecting portions, the first group of pipe valves comprising a first valve 351 and a second valve 352; a second group of pipe valves corresponding to the second group of connecting portions, the second group of pipe valves comprising a first valve 351 and a second valve 352.

[0059] Specifically, as shown in FIG. 2, the first valve 351 of the first group of pipe valves is arranged between the liquid inlet portion 343 of the first group of connecting portions and the recovery portion 344 of the first group of connecting portions, and the second valve 352 of the first group of pipe valves is arranged between the recovery portion 344 of the first group of connecting portions and the liquid outlet portion 345 of the first group of connecting portions; the first valve 351 of the second group of pipe valves is arranged between the liquid inlet portion 343 of the second group of connecting portions and the recovery portion 344 of the second group of connecting portions, and the second valve 352 of the second group of pipe valves is arranged between the recovery portion 344 of the second group of connecting portions and the liquid outlet portion 345 of the second group of connecting portions. When any one or both of the first valve 351 and the second valve 352 is closed, the transportation flow channel between the second connecting portion 342 and the third connecting portion 346 is in a blocked state; when both the first valve 351 and the second valve 352 are opened, the transportation flow channel between the second connecting portion 342 and the third connecting portion 346 is in an unblocked state.

[0060] Optionally, referring to FIGS. 1 and 3, the transportation device further comprises a third valve 353 and a fourth valve 354 arranged in the communication pipe 34, the third valve 353 being arranged between the propelling device 40 and the second connecting portion 342, and the fourth valve 354 being arranged between the third connecting portion 346 and the recovery device 50; the slurry filtration and transportation system further comprises a fifth valve 355 and a sixth valve 356, the fifth valve 355 being arranged in a pipeline between the pulping equipment 10 and the diaphragm pump 70, and the sixth valve 356 being arranged between the fourth connecting portion 347 and the storage equipment 60.

[0061] The filtration and transportation process of the slurry will be described below by taking the slurry filtration and transportation system shown in FIG. 1 as an example:

[0062] ① open the fifth valve 355, open the first liquid inlet valve 313 and the first liquid outlet valve 323, open the second liquid inlet valve 314 and the second liquid outlet valve 324, close the third valve 353 and the fourth valve 354, close the first valve 351 and the second valve 352 of the first group of pipe valves, close the first valve 351 and the second valve 352 of the second group of pipe valves, close all the first recovery valves 333 and all the second recovery valves 334, thus the first liquid inlet flow channel, the first liquid outlet flow channel, the second liquid inlet flow channel and the second liquid outlet flow channel are all unblocked;

[0063] ② start the diaphragm pump 70, the diaphragm pump 70 pumps the slurry in the pulping device 10 into the conveying device, the slurry flows from the first connecting part 341 into the conveying flow channel and along the communication pipe 34 in turn through the second connecting part 342 and the liquid inlet part 343 of the first group of connecting pipe parts, then the slurry along the first liquid inlet flow channel enters the rotary filter 21, after the slurry is filtered in the rotary filter 21, it flows along the first liquid outlet flow channel to the liquid outlet part 345 of the first group of connecting pipe parts, thus it flows into the communication pipe 34 again, then in turn through the liquid outlet part 345 of the first group of connecting pipe parts and the liquid inlet part 343 of the second group of connecting pipe parts, then the slurry along the second liquid inlet flow channel enters the filter de-ironing device 22, after the slurry is filtered in the filter de-ironing device 22, it flows along the second liquid outlet flow channel to the liquid outlet part 345 of the second group of connecting pipe parts, thus it flows into the communication pipe 34 again, then the slurry flows to the storage device 60;

[0064] ③ open the sixth valve 356, so that the slurry filtered by the filtering device 20 flows into the storage device 60 in turn through the third connecting part 346 and the fourth connecting part 347;

[0065] ④ when the slurry in the pulping device 10 is emptied, close the diaphragm pump 70, close the first liquid inlet valve 313 and the first liquid outlet valve 323, close the second liquid inlet valve 314 and the second liquid outlet valve 324, thus the first liquid inlet flow channel, the first liquid outlet flow channel, the second liquid inlet flow channel and the second liquid outlet flow channel are all blocked;

[0066] ⑤ open the first valve 351 and the second valve 352 of the first group of pipe valves, open the first valve 351 and the second valve 352 of the second group of pipe valves, open all the first recovery valves 333 and all the second recovery valves 334, so that the recovery flow channel of the first recovery pipe 331 is maintained in an unblocked state for 10-20 minutes, and the recovery flow channel of the second recovery pipe 332 is maintained in an unblocked state for 10-20 minutes, so that the residual slurry in the rotary filter 21 and the filter de-ironing device 22 respectively flows into the communication pipe 34 through the first recovery pipe 331 and the second recovery pipe 332, after the rotary filter 21 and the filter de-ironing device 22 are emptied of the residual slurry, close all the first recovery valves 333 and all the second recovery valves 334;

[0067] ⑥opening the third valve 353 and starting the propelling device 40, the propelling device 40 generates a propelling airflow and pushes the push ball in the propelling device 40 into the propelling channel, the push ball enters the communicating pipe 34 from the second connecting part 342 under the propelling force of the propelling airflow, and then the push ball passes through the liquid inlet part 343 of the first group of connecting pipe parts, the recovery part 344 of the first group of connecting pipe parts, the liquid outlet part 345 of the first group of connecting pipe parts, the liquid inlet part 343 of the second group of connecting pipe parts, the recovery part 344 of the second group of connecting pipe parts, and the liquid outlet part 345 of the second group of connecting pipe parts in sequence along the extension direction of the transportation flow channel, during which the residual slurry flowing into the communicating pipe 34 through the recovery assembly 33 is pushed by the push ball to the storage device 60, and the push ball scrapes the slurry adhered to the inner wall of the transportation flow channel and pushes it to the storage device 60 as well;

[0068] ⑦before the push ball reaches the third connecting part 346, opening the fourth valve 354 and operating the recovery device 50 to make the push ball enter the recovery channel, thereby completing the recovery of the push ball by the recovery device 50.

[0069] In this way, the push ball is in sliding fit with the inner wall of the transportation flow channel, so that the residual slurry in the transportation flow channel is more thoroughly cleaned and recovered, the wall-hanging slurry in the transportation flow channel is significantly reduced, the residual slurry flowing into the communicating pipe 34 through the recovery assembly 33 is pushed by the push ball to flow into the storage device 60, and the cleaning and recovery efficiency of the residual slurry is greatly improved. In addition, the total length of the communicating pipe 34 to be cleaned is longer along the extension direction of the transportation flow channel, and the total length refers to the total length of the pipe section that can be cleaned by the push ball. In the slurry filtration and transportation system shown in FIGS. 1 and 3, the transportation channel between the second connecting part 342 and the third connecting part 346 can be scraped by the push ball to remove the slurry adhered to the inner wall.

[0070] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features within the spirit and scope of the present application is contemplated.

[0071] Those skilled in the art should understand that the above embodiments are only used to illustrate the present application, but not as a limitation to the present application, and any appropriate changes and variations made to the above embodiments within the spirit and scope of the present application are within the scope of the present application.

Claims

1. A slurry filtration transport system, comprising: A pulping device (10), a processing device and a storage device (60), the processing device comprising a filtering device (20) and a conveying device, the conveying device comprising a liquid inlet assembly (31), a liquid outlet assembly (32) and a recovery assembly (33), The liquid inlet assembly (31) is connected to the pulping device (10) and the filtering device (20), the liquid outlet assembly (32) is connected to the storage device (60) and the filtering device (20), and the recovery assembly (33) is connected to the filtering device (20) and the storage device (60).

2. The slurry filtration transport system of claim 1, wherein, The conveying device further comprises a connecting pipe (34), and the pulping device (10) and the storage device (60) are respectively connected to two ends of the connecting pipe (34), The connecting pipe (34) comprises a connecting pipe part, and the connecting pipe part comprises a liquid inlet part (343), a recovery part (344) and a liquid outlet part (345) arranged in sequence, The liquid inlet assembly (31), the recovery assembly (33) and the liquid outlet assembly (32) are respectively connected to the liquid inlet part (343), the recovery part (344) and the liquid outlet part (345).

3. The slurry filtration transport system of claim 2, wherein, The conveying device further comprises at least one set of pipe valves, and the pipe valves correspond to the connecting pipe part one by one, The pipe valves comprise a first valve (351) and a second valve (352), the first valve (351) is arranged between the corresponding liquid inlet part (343) and the recovery part (344), and the second valve (352) is arranged between the corresponding recovery part (344) and the liquid outlet part (345).

4. The slurry filtration transport system of claim 2 or 3, wherein, The filtering device (20) comprises a container provided with a surplus discharge port, the recovery assembly (33) comprises a recovery pipe, and the recovery pipe is connected to the surplus discharge port and the recovery part (344).

5. The slurry filtration transport system of claim 4, wherein, The recovery assembly (33) further comprises a recovery valve arranged on the recovery pipe.

6. The slurry filtration transport system of any one of claims 2 to 5, wherein, The connecting pipe (34) comprises two sets of connecting pipe parts arranged in sequence, the filtering device (20) comprises a rotary filter (21) and a filter de-ironing device (22), the liquid inlet assembly (31) comprises a first liquid inlet pipe (311) and a second liquid inlet pipe (312), the liquid outlet assembly (32) comprises a first liquid outlet pipe (321) and a second liquid outlet pipe (322), and the recovery assembly (33) comprises a first recovery pipe (331) and a second recovery pipe (332), wherein: The first liquid inlet pipe (311) and the first liquid outlet pipe (321) are connected to the rotary filter (21) and are respectively connected to the liquid inlet part (343) and the liquid outlet part (345) of the first set of connecting pipe parts; The second liquid inlet pipe (312) and the second liquid outlet pipe (322) are connected to the filter de-ironing device (22) and are respectively connected to the liquid inlet part (343) and the liquid outlet part (345) of the second set of connecting pipe parts; The first recovery pipe (331) is connected to the rotary filter (21) and the recovery part (344) of the first set of connecting pipe parts, and the second recovery pipe (332) is connected to the filter de-ironing device (22) and the recovery part (344) of the second set of connecting pipe parts.

7. The slurry filtration transport system of claim 6, wherein, The filter iron remover (22), the second liquid inlet pipe (312) and the second liquid outlet pipe (322) are configured as two, and the second recovery pipe (332) is configured as two groups.

8. The slurry filtration transport system of any one of claims 2 to 7, wherein, The processing device further comprises a propelling device (40), and the communication pipe (34) further comprises a first connecting part (341) and a second connecting part (342), The first connecting part (341), the second connecting part (342) and the connecting pipe part are sequentially arranged, The first connecting part (341) is connected with the pulping device (10), and the second connecting part (342) is connected with the propelling device (40).

9. The slurry filtration transport system of claim 8, wherein, The processing device further comprises a recovery device (50), and the communication pipe (34) further comprises a third connecting part (346) and a fourth connecting part (347), The second connecting part (342), the connecting pipe part, the third connecting part (346) and the fourth connecting part (347) are sequentially arranged, the third connecting part (346) is connected with the recovery device (50), and the fourth connecting part (347) is connected with the storage device (60).

10. The slurry filtration transport system of claim 9, wherein, The transportation device further comprises a third valve (353) and a fourth valve (354), the third valve (353) is arranged between the second connecting part (342) and the propelling device (40), and the fourth valve (354) is arranged between the third connecting part (346) and the recovery device (50).

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