Magnetic separation method and production system

Abstract

The present invention discloses a magnetic separation method and production system. The production system includes a primary drum and a secondary drum. The outer surface of the secondary drum faces the outer surface of the primary drum, forming a gap. The magnetic separation method includes the following steps: obtaining the magnetic substance content of the mixed liquid at the outlet; if the magnetic substance content exceeds a preset content, controlling and reducing the flow rate of the mixed liquid through the primary drum; obtaining the liquid content of the magnetic substance separated from the mixed liquid; and if the liquid content of the magnetic substance exceeds the preset liquid content, controlling and reducing the gap between the outer surfaces of the primary drum and the secondary drum. The present invention can improve separation quality and reduce the liquid content of the separated magnetic substance.

Description

Technical Field

[0001] The present invention relates to the field of magnetic separation technology, in particular to a magnetic separation method and a production system. Background Art

[0002] During workpiece processing (e.g., shot blasting or other machining processes), working fluids or coolants are used. After the processing is complete, the waste fluids generated need to be recovered and treated. The waste products typically include liquid waste and solids (e.g., metal chips, scale, and metal grit).

[0003] In the prior art, the recovery of solids (magnetic substances) in waste liquids requires a lot of time and economic costs, and the recovery quality is poor. Therefore, how to improve the recovery quality of solids is an urgent problem to be solved in this field. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art to a certain extent. To this end, the present invention provides a magnetic separation method and production system that can reduce the content of magnetic material after separation of the mixed liquid and reduce the liquid content of the separated magnetic material.

[0005] To achieve the above objectives, the first aspect of the present invention discloses a magnetic separation method for a main control module of a production system, wherein the production system includes a primary roller and a secondary roller, both of which are used to adsorb magnetic materials, and the outer surface of the secondary roller is opposite to the outer surface of the primary roller and forms a gap. The magnetic separation method includes the following steps:

[0006] obtaining the content of magnetic material in the mixed liquid after it passes through the first-stage drum;

[0007] When the content of the magnetic substance is greater than a preset content, the first actuator is controlled to operate so as to reduce the flow rate of the mixed liquid passing through the first-stage drum;

[0008] Obtain the liquid content of the magnetic material separated from the secondary roller,

[0009] When the liquid content of the magnetic material is greater than a preset liquid content, the second actuator is controlled to operate to reduce the gap between the outer surface of the first roller and the outer surface of the second roller.

[0010] This technical solution adjusts the flow rate through the first-stage drum based on the amount of magnetic material in the mixed liquid at the outlet, thereby improving the adsorption efficiency of the magnetic material and reducing the magnetic material content at the outlet, ensuring that the separated mixed liquid meets production requirements. In addition, this application sets a preset liquid content. When the liquid content of the separated magnetic material exceeds this preset value, the gap can be adjusted to effectively reduce the liquid content of the magnetic material, thereby improving the efficiency of subsequent processing.

[0011] Furthermore, the production system includes a liquid inlet, through which the mixed liquid flows to the outer surface of the primary roller, and the first actuator includes a first driving member and a gap adjustment plate, wherein the gap adjustment plate is connected to the output end of the first driving member to move under the drive of the first driving member.

[0012] When the content of the magnetic substance is greater than a preset content, controlling the first actuator to reduce the flow rate of the mixed liquid passing through the first-stage drum includes:

[0013] The first driving member is controlled to drive the gap adjustment plate to move, so as to increase the shielding of the liquid inlet by the adjustment plate.

[0014] Furthermore, when the liquid content of the magnetic material is greater than a preset liquid content, controlling to reduce the gap between the outer surface of the first roller and the outer surface of the second roller includes: controlling the actuator to move the second roller toward the first roller.

[0015] Furthermore, the preset content ranges from 0.04% to 0.06%.

[0016] Furthermore, the gap ranges from 0 to 5 mm, and the preset liquid content is from 20% to 30%.

[0017] The second aspect of the present invention discloses a main control module, comprising: one or more processors; a memory on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors, the one or more processors implement the magnetic separation method described in the first aspect.

[0018] A third aspect of the present invention discloses a computer-readable medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the magnetic separation method described in the first aspect.

[0019] The fourth aspect of the present invention discloses a production system, including production equipment, a first-level roller, a second-level roller and a liquid tank, the input end of the liquid tank is used to connect with the mixed liquid discharge port of the production equipment, at least a portion of the outer surface of the first-level roller is immersed in the mixed liquid in the liquid tank, the first-level roller can rotate around its own axis and magnetically adsorb magnetic substances in the mixed liquid, the outer surface of the second-level roller is opposite to the outer surface of the first-level roller and forms a gap, the production system also includes a magnetic substance content detection device and a magnetic substance liquid content detection device and the main control module described in the second aspect, the magnetic substance content detection device and the magnetic substance liquid content detection device can send the detected magnetic substance content and magnetic substance water content of the mixed liquid to the main control module.

[0020] Furthermore, the production system includes a second actuator, the second actuator includes a second driving member, the output end of the second driving member is connected to the secondary roller, and can drive the secondary roller to move toward the primary roller, and the second driving member is communicatively connected to the main control module.

[0021] Furthermore, the liquid tank includes a tank body, and a liquid inlet is formed between the outer surface of the first-level roller and the tank body. The production system includes a first actuator, and the first actuator includes a first driving member and a gap adjustment plate. The gap adjustment plate is connected to the output end of the first driving member, and the gap adjustment plate is slidably set on the tank body, and one end of the gap adjustment plate extends into the liquid inlet. The first driving member is communicatively connected to the main control module, and the first driving member can drive the gap adjustment plate to slide and cover the liquid inlet.

[0022] The production system in this application uses two rollers that cooperate with each other to separate the magnetic material in the mixed liquid. It abandons the practice of using a scraper to scrape the magnetic material from the surface of the magnetic roller in traditional technology. Instead, it uses a magnetic secondary roller to adsorb the magnetic material from the primary roller. This effectively reduces the wear of the primary roller, extends its service life, and improves the adsorption quality. In addition, a gap is designed between the primary roller and the secondary roller in this embodiment so that the excess water carried by the magnetic material can drip naturally in this space, thereby reducing the liquid content of the recovered magnetic material, further shortening the processing time and reducing economic costs. Moreover, through the above-mentioned magnetic separation method, the corresponding parameters can be adjusted according to different working conditions during the separation process to ensure that the magnetic material content and liquid content are within the required range, thereby improving the separation efficiency and separation quality.

[0023] These features and advantages of the present invention will be further disclosed in the following detailed description and accompanying drawings. The preferred embodiments and methods of the present invention will be fully illustrated in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of the present invention. Furthermore, although multiple features, elements, and components may be present in each of the following text and accompanying drawings, and are labeled with different symbols or numbers for convenience, they all represent components with the same or similar structure or function. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a flow chart of a magnetic separation method according to one embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of a production system according to one embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the main structure of a drum according to one embodiment of the present invention;

[0028] Figure 4 A side cross-sectional schematic diagram of a drum according to one embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the overall system of one embodiment of the present invention (multiple secondary rollers);

[0030] Figure 6 This is a flow chart of an implementation of the main control module provided by the present invention;

[0031] Figure 7 A flowchart of an embodiment of the computer-readable medium provided by the present invention.

[0032] in,

[0033] 10. First-stage roller; 11. First inner cylinder; 12. First outer cylinder;

[0034] 20. Secondary drum; 21. Second inner drum; 22. Second outer drum;

[0035] 30. Joining plate;

[0036] 40. Liquid tank; 41. Guide plate; 42. Curved plate; 43. Rectifier plate; 44. Gap adjustment plate;

[0037] 50. Water squeezing roller;

[0038] 60. Magnetic blocks;

[0039] 70. Mixed liquid; 71. Magnetic substance;

[0040] 80. Carbon brush ring;

[0041] 101. Processor; 102. Memory; 103. I / O interface; 104. Bus. DETAILED DESCRIPTION

[0042] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described in the embodiments are intended to explain the present invention and are not to be construed as limiting the present invention.

[0043] References in this specification to "one embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment disclosed herein. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment.

[0044] In related technologies, the recovery of magnetic substances in waste liquid usually includes separating the magnetic substances from the waste liquid and drying the separated magnetic substances for reuse. The current magnetic separation devices have poor separation quality for magnetic substances in waste liquid. A certain amount of magnetic substances may still exist in the waste liquid after separation, causing waste. In addition, the liquid content of the separated magnetic substances is high, so it takes a lot of time and economic cost to dry them in subsequent processing.

[0045] In view of this, the present invention provides a magnetic separation method, see the attached Figure 1 , a main control module for a production system, the production system includes a primary roller and a secondary roller, the primary roller and the secondary roller are both used to absorb magnetic materials, the outer surface of the secondary roller and the outer surface of the primary roller are opposite to each other and form a gap, the magnetic separation method includes the following steps:

[0046] S10, obtaining the magnetic substance content in the mixed liquid after passing through the first-stage drum;

[0047] S20, when the content of the magnetic substance is greater than a preset content, controlling the first actuator to operate so as to reduce the flow rate of the mixed liquid passing through the primary drum;

[0048] S30, obtaining the liquid content of the magnetic material separated from the secondary roller,

[0049] S40. When the liquid content of the magnetic material is greater than a preset liquid content, the second actuator is controlled to operate to reduce the gap between the outer surface of the first roller and the outer surface of the second roller.

[0050] In industrial production, there are generally certain requirements for the final content of magnetic substances in the mixed liquid. Only when the content of magnetic substances in the mixed liquid is reduced to below the preset content, can the treatment of the mixed liquid be deemed to meet the standards. In step S10 of this embodiment, the content of magnetic substances at the outlet of the mixed liquid is detected to determine whether the separation operation of the magnetic separation device has met the standards. The detection of the content of magnetic substances at the outlet of the mixed liquid in this embodiment can be carried out by the following method: a certain amount of mixed liquid at the outlet position is extracted from the outlet position of the mixed liquid, and the content of magnetic substances in the mixed liquid is obtained through operations such as filtration and drying. In actual use, in order to improve the accuracy of the detection of the content of magnetic substances, the mixed liquid at different outlet positions can be extracted multiple times for multiple measurements, and then the average value of the content of magnetic substances is obtained, and the average value is used as the final content of magnetic substances.

[0051] It should be noted that the magnetic material content obtained in this embodiment can be obtained by writing.

[0052] In step S20, this embodiment sets a reference standard value such as a preset content, and judges whether the magnetic separation meets the production requirements by comparing the actual magnetic substance content of the mixed liquid at the outlet position with the preset content. When the magnetic substance content detected in step S10 exceeds the preset content, it indicates that the separation effect is not as expected, and measures need to be taken to improve the separation efficiency. Because under the same working conditions, the separation capacity of the first-level roller during use is basically certain, this embodiment improves the separation effect by reducing the flow rate passing through the first-level roller at the same time. Excessive flow rate may cause the first-level roller to be unable to effectively adsorb all magnetic substances. Therefore, the separation effect can be improved by reducing the flow rate, and then the flow rate of the mixed liquid at the outlet position can be reduced.

[0053] Of course, it is conceivable that the adsorption efficiency can be improved by increasing the magnetism of the first-stage roller, and the magnetic material content of the mixed liquid at the outlet position can also be reduced. Specifically, the first-stage roller can be set in the form of an electromagnet, and the magnetism can be changed by changing the current, thereby changing the adsorption capacity.

[0054] When the content of magnetic material is less than the preset content, it means that the adsorption capacity of the first-stage roller and the second-stage roller is sufficient. At this time, the magnetic separation operation can be carried out normally without adjustment.

[0055] In step S30, the principle of detecting the liquid content of the separated magnetic material is proposed. In actual use, a certain amount of separated magnetic material can be extracted, and the liquid content of the separated magnetic material can be determined by weighing it after drying. Similarly, in order to improve the accuracy of the liquid content of the magnetic material, multiple groups can also be extracted for testing, and the average value can be finally obtained as the actual liquid content of the magnetic material.

[0056] The liquid content of the magnetic material in this embodiment can also be obtained by writing. In step S40, this embodiment defines a preset liquid content. The preset liquid content in this embodiment is compared with the liquid content of the magnetic material obtained in S30. If the liquid content of the magnetic material exceeds the preset range, that is, is greater than the preset liquid content, it indicates that the liquid content is too high and does not meet production standards, and measures must be taken to reduce it. Conversely, if the liquid content is lower than the preset value, it indicates that the liquid content of the magnetic material is within an acceptable range and no adjustment is required.

[0057] This embodiment reduces the liquid content of the magnetic material by controlling the distance between the first roller and the second roller. In this embodiment, there is a certain gap between the first roller and the second roller, as shown in the attached figure. Figure 2 As shown, the magnetic material will gather between the primary drum and the secondary drum and will eventually be carried away by the secondary drum for separation. At the gathering position of the magnetic material, the water can flow back into the mixed liquid through the gap between the primary drum and the secondary drum, which can reduce the liquid content of the separated magnetic material and thus improve the efficiency of subsequent magnetic material processing (such as drying, etc.).

[0058] In actual use, the distance between the primary roller and the secondary roller can be adjusted according to the liquid content. The larger the distance between the primary roller and the secondary roller, the easier it is for the moisture of the magnetic material gathered between the primary roller and the secondary roller to flow out and be discharged back into the mixed liquid, which means that the liquid content of the separated magnetic material can be reduced.

[0059] It should be noted that the present invention provides a principle for controlling the content of magnetic material at the outlet of the mixed liquid by adjusting the flow rate, and for adjusting the liquid content of the magnetic material by adjusting the gap between the primary and secondary rollers. In practical applications, various methods can be used to adjust the flow rate (i.e., the specific design of the first actuator), such as adjusting the opening of the liquid inlet or slowing the flow rate, and this invention does not impose strict restrictions on this. Furthermore, various implementations are possible for adjusting the gap between the primary and secondary rollers (the specific structure of the second actuator), such as increasing the roller diameter or causing the rollers to move relative to each other, and this is not a limitation.

[0060] In one embodiment of the present invention, the production system is equipped with a liquid inlet through which the mixed liquid enters and flows toward the outer wall of the primary drum. The first actuator includes a first driving member and a gap adjustment plate. The gap adjustment plate is connected to the output end of the first driving member and is driven to move by the first driving member. When the magnetic material content exceeds a predetermined content, controlling the first actuator to reduce the flow rate of the mixed liquid through the primary drum includes controlling the first driving member to drive the gap adjustment plate to move so as to increase the shielding of the adjustment plate from the liquid inlet.

[0061] In this embodiment, the flow rate regulation is converted into adjusting the size of the liquid inlet. This design is easy to operate. In actual applications, the first actuator can flexibly control the valve opening size by adjusting the valve body structure or the gap adjustment plate according to the specific scenario.

[0062] As one of the embodiments of the present invention, when the liquid content of the magnetic material is greater than a preset liquid content, controlling the reduction of the gap between the outer surface of the first roller and the outer surface of the second roller includes: controlling the actuator to move the second roller toward the first roller.

[0063] In this embodiment, the secondary roller can be configured to slide. When the gap between the primary and secondary rollers needs to be adjusted, the secondary roller only needs to be moved in the corresponding direction. It should be noted that the actuator for adjusting the distance between the primary and secondary rollers can be of various types, such as a motor or a cylinder driving the secondary roller to slide.

[0064] The preset content of one embodiment of the present invention is in the range of 0.04% to 0.06%. The preset content of the magnetic substance in the mixed solution in different usage scenarios of the present invention can be set as needed. In this embodiment, the preset content is set in the range of 0.04% to 0.06%. The following description is based on the preset content of 0.05% as an example: See the attached Figure 2 Table 1 and Table 1 are used as an example to illustrate one working condition in the shot blasting equipment, where a represents the opening size of the liquid inlet, b represents the distance between the outer surface of the first-stage roller and the bottom of the liquid tank, and c represents the content of magnetic substances in the mixed liquid at the outlet position.

[0065] Table 1

[0066]

[0067] As can be seen from Table 1, when the distance b between the outer surface of the first-stage roller and the bottom surface of the liquid tank is constant (25 mm), the smaller the size a of the liquid inlet opening, the smaller the flow rate, and the lower the content c of the magnetic substance in the mixed liquid at the corresponding outlet position. Therefore, when the detected content of c is higher than 0.05% (preset content), the size of the liquid inlet opening can be reduced, as shown in Table 1, by adjusting a to less than 17 mm.

[0068] Of course, it is conceivable that in actual use, the distance b between the outer surface of the first-stage roller and the bottom surface of the liquid tank also has a certain influence on the adsorption capacity, which can be taken into consideration during design.

[0069] As one of the embodiments of the present invention, the range of the gap is 0 to 5 mm, and the preset liquid content is 20% to 30%.

[0070] The gap in the present invention can be set according to the actual working conditions (generally, the size of the magnetic material needs to be considered). The following is an example of a preset liquid content of 25%:

[0071] See attached Figure 2 and Table 2, taking one working condition in the shot blasting system as an example to illustrate, where d represents the distance between the primary roller and the secondary roller;

[0072] Table 2

[0073]

[0074] It can be seen from Table 2 that the liquid content of the separated magnetic material decreases as the distance between the primary roller and the secondary roller decreases. Therefore, in actual use, if the preset liquid content is set to 25%, the distance between the primary roller and the secondary roller can be adjusted to less than 1 mm.

[0075] As a second aspect of the present invention, a main control module is provided, wherein, Figure 6 As shown, the main control module includes: one or more processors 101; a memory 102, on which one or more computer programs are stored. When the one or more computer programs are executed by the one or more processors 101, the one or more processors 101 implement the control method provided by the first aspect of the present invention.

[0076] The main control module may further include one or more I / O interfaces 103 connected between the processor 101 and the memory 102 and configured to implement information interaction between the processor 101 and the memory 102 .

[0077] Among them, the processor 101 is a device with data processing capabilities, including but not limited to the central processing unit 101 (CPU); the memory 102 is a device with data storage capabilities, including but not limited to random access memory 102 (RAM, more specifically such as SDRAM, DDR, etc.), read-only memory 102 (ROM), electrically erasable programmable read-only memory 102 (EEPROM), flash memory (FLASH); the I / O interface 103 (read-write interface) is connected between the processor 101 and the memory 102, and can realize information exchange between the processor 101 and the memory 102, including but not limited to the data bus 104 (Bus), etc.

[0078] In some embodiments, the processor 101 , the memory 102 , and the I / O interface 103 are interconnected via a bus 104 , and further connected to other components of the main control module.

[0079] As a third aspect of the present invention, Figure 7 As shown, a computer-readable medium is provided, on which a computer program is stored, wherein the computer program implements the above-mentioned control method provided by the present invention when executed by the processor 101.

[0080] As a fourth aspect of the present invention, see the attached Figures 2 to 5 , provides a production system, including production equipment, a primary roller 10, a secondary roller 20 and a liquid tank 40, the input end of the liquid tank 40 is connected to the mixed liquid discharge port of the production equipment, at least a portion of the outer surface of the primary roller 10 is immersed in the mixed liquid 70 in the liquid tank 40, the primary roller 10 can rotate around its own axis and magnetically absorb the magnetic substance 71 in the mixed liquid 70, the outer surface of the secondary roller 20 is opposite to the outer surface of the primary roller 10 and forms a gap, the secondary roller 20 is magnetic and can absorb the magnetic substance 71 from the primary roller 10, the production system also includes a magnetic substance content detection device and a magnetic substance liquid content detection device and a main control module of the second aspect, the magnetic substance content detection device and the magnetic substance liquid content detection device can send the detected magnetic substance content and magnetic substance water content of the mixed liquid 70 to the main control module.

[0081] When this embodiment is in use, the first-level roller 10 is in direct contact with the mixed liquid 70, while the second-level roller 20 is usually not in direct contact with the mixed liquid 70. It only needs to maintain its relative position relationship with the first-level roller 10. The second-level roller 20 can replace the function of the scraper in the prior art. The second-level roller 20 in this embodiment is also magnetic and can adsorb the magnetic material 71 attached to its outer surface to its own outer surface without contacting the first-level roller 10. This can avoid wear of the first-level roller 10, increase the service life of the first-level roller 10, and avoid the adhesion of magnetic material 71 or other impurities in the wear gaps of the first-level roller 10.

[0082] The present invention does not specifically limit how the primary roller 10 and the secondary roller 20 are magnetic. The rollers themselves can be configured to have magnetic structures, or they can be configured to have a structure in which an inner and outer roller cooperate with each other, with a magnetic structure provided inside. Of course, the magnetic structure can be configured as a permanent magnet. Of course, magnetism can also be generated by electromagnets.

[0083] Existing magnetic rollers made of materials like ferrite have weak magnetism and are unable to absorb large magnetic impurities. While materials like neodymium iron boron offer stronger magnetism, they are more expensive overall, and the minimum magnetic force required varies depending on the application. If each machine required a different magnet material to produce the same magnetic roller specifications, this would increase design and production costs, and extend production cycles. Therefore, using electromagnets can better adapt to different application environments and reduce costs.

[0084] As one of the embodiments of the present invention, the production system includes a second actuator, the second actuator includes a second driving member, the output end of the second driving member is connected to the secondary roller 20, and can drive the secondary roller 20 to move toward the primary roller 10, and the second driving member is communicatively connected to the main control module.

[0085] As one of the embodiments of the present invention, a liquid inlet is formed between the outer surface of the first-level roller 10 and the liquid tank, and the production system includes a first actuator, which includes a first driving member and a gap adjustment plate, and the gap adjustment plate is connected to the output end of the first driving member. The gap adjustment plate 44 is slidably set on the liquid tank, and one end of the gap adjustment plate 44 extends into the liquid inlet. The first driving member is communicatively connected to the main control module, and the first driving member can drive the gap adjustment plate 44 to slide and cover the liquid inlet.

[0086] In actual design, the liquid tank 40 may include a guide plate 41 and an arc plate 42, as shown in the attached Figure 2As shown, the first end of the guide plate 41 can be connected to the waste discharge port of the production equipment, and the second end of the guide plate 41 is connected to the arc plate 42. A depression is formed on the arc plate 42 to match the outer surface of the first-level roller 10. The part of the first-level roller 10 immersed in the liquid tank 40 is opposite to the depression. The liquid inlet is formed between the outer surface of the first-level roller 10 and the second end of the guide plate 41, wherein a depression portion is formed in the liquid tank 40 to match the outer surface of the first-level roller 10, and the overall shape of the depression is an arc structure that matches the outer surface of the first-level roller 10. In this way, the area relative to the bottom of the first-level roller 10 and the liquid tank 40 can be increased, that is, the adsorption area is increased, and thus the adsorption efficiency is improved.

[0087] The above two embodiments respectively provide embodiments for adjusting the distance between the primary roller 10 and the secondary roller 20 and adjusting the size of the liquid inlet opening. In actual use, automatic adjustment of the gap and flow rate can be achieved.

[0088] The primary roller 10 and the secondary roller 20 in this embodiment may have similar structures. Specifically, the primary roller 10 may include a first inner roller 11, and the first outer roller 12 is sleeved on the outer side of the first inner roller 11. The first inner roller 11 forms a non-magnetic first separation area and a magnetic first adsorption area on the outer surface of the first outer roller 12. The first adsorption area is used to adsorb the magnetic material 71.

[0089] The secondary roller 20 includes a second inner cylinder 21, and the second outer cylinder 22 is sleeved on the outside of the second inner cylinder 21 and can rotate relative to the second inner cylinder 21. The second inner cylinder 21 forms a non-magnetic second separation area and a magnetic second adsorption area on the outer surface of the second outer cylinder 22. The second adsorption area is opposite to the first separation area. The outer surface of the second outer cylinder 22 and the outer surface of the first outer cylinder 12 form the set distance, and the first outer cylinder 12 and the second outer cylinder 22 have the same rotation direction.

[0090] The first-stage drum 10 and the second-stage drum 20 in the present invention have similar structures. Both include a fixed inner drum and a movable outer drum. When in use, the first outer drum 12 and the second outer drum 22 can rotate around the corresponding first inner drum 11 and the second inner drum 21. The first inner drum 11 and the second inner drum 21 are magnetic, while the first outer drum 12 and the second outer drum 22 themselves are not magnetic. When separating the magnetic material 71, the magnetic material 71 is adsorbed on the outer surfaces of the first outer drum 12 and the second outer drum 22 through the magnetism of the first inner drum 11 and the second inner drum 21.

[0091] When the first inner cylinder 11 and the second inner cylinder 21 of the present invention are actually arranged, they can be covered with magnetism on the entire circumference, or only be arranged with magnetism within a specific angle range, see the attached Figure 2In the present invention, the angles of the first inner cylinder 11 and the second inner cylinder 21 in the circumferential direction are both less than 360°. In this way, when in use, a magnetic area and a non-magnetic area will be formed in the circumferential direction. The portion of the first outer cylinder 12 corresponding to the magnetic area of the first inner cylinder 11 forms the first adsorption area in this embodiment, and the portion corresponding to the non-magnetic area of the first inner cylinder 11 forms the first separation area in this embodiment.

[0092] In actual use, the portion corresponding to the magnetic area of the first inner cylinder 11 can be directly immersed in the mixed liquid 70. During the rotation of the first outer cylinder 12, the magnetic substance 71 in the mixed liquid 70 can be adsorbed on the outer surface of the first outer cylinder 12 in the first adsorption area. As the first outer cylinder 12 rotates, the first outer cylinder 12 drives the magnetic substance 71 on its outer surface to rotate together. When the magnetic substance 71 on the first outer cylinder 12 rotates to the position corresponding to the non-magnetic area of the first inner cylinder 11, the magnetic adsorption effect on the magnetic substance 71 on the outer surface of the first outer cylinder 12 disappears, which facilitates the separation of the magnetic substance 71 from the outer surface of the first outer cylinder 12.

[0093] In actual use, see the attached Figure 2 In this embodiment, the angle θ1 of the magnetic zone of the first inner cylinder 11 is set to 250°, and the angle θ2 corresponding to the non-magnetic zone is 110°. It can be seen that the magnetic zone of the first inner cylinder 11 is larger than the non-magnetic zone, which can increase the adsorption area of the first-level roller 10 and improve the adsorption efficiency. Of course, in actual settings, the angle θ1 of the magnetic zone of the first inner cylinder 11 can be set to 180°-270°. It should be noted that the first inner cylinder 11 in this embodiment does not mean that the magnetic zone needs to completely cover the entire range of the magnetic zone (that is, it does not mean that a full magnetic zone will be formed). In the magnetic zone, the magnetic area can also be set to be distributed in intervals (there is no magnetism in the magnetic intervals), as shown in the attached figure. Figure 1 、 2 As shown, the magnetic blocks 60 are spaced apart around the circumference of the drum. During design, the size of these spaces should be rationally planned to ensure that when the magnetic material 71 moves to a position relative to the space, it will not fall off the first outer drum 12 due to the attraction force of the adjacent magnetic areas. This design not only optimizes the magnetic force distribution but also effectively reduces costs.

[0094] Similarly, the second inner drum 21 in the secondary drum 20 of this embodiment can be configured to have a similar structure to the first inner drum 11, see the attached Figure 2, but in actual setting, the angle range occupied by the magnetic zone of the second inner cylinder 21 can be relatively small, and the angle range of the non-magnetic zone is larger. In this embodiment, the angle ɑ1 of the magnetic zone of the second inner cylinder 21 can be set to 120° as shown in the accompanying figure, and the non-magnetic zone ɑ2 can be set to 240°. It can be seen that the difference between the second inner cylinder 21 and the first inner cylinder 11 lies in the distribution angle of the magnetic zone and the non-magnetic zone. The angle of the magnetic zone of the second inner cylinder 21 is smaller than that of the magnetic zone of the first inner cylinder 11, which facilitates the separation of the magnetic material 71 from the outer surface of the secondary roller 20.

[0095] As can be seen from the above, the first inner cylinder 11 and the second inner cylinder 21 in this embodiment form a notch area on the cylinder through the arrangement of the cylinder structure itself, thereby forming a non-magnetic area. In actual arrangement, the first inner cylinder 11 and the second inner cylinder 21 can also be arranged as a circumferentially closed cylinder structure, and circumferentially distributed electromagnets are arranged on the cylinder structure. When in use, it is only necessary to energize the electromagnets within a certain angle range as needed, and the other part is not energized to produce the same effect as the above-mentioned magnetic area and non-magnetic area. Such an arrangement has lower installation requirements for the first-level roller 10 and the second-level roller 20 during installation.

[0096] In the actual setting of this embodiment, it is necessary to ensure that the magnetism of the secondary roller 20 at the relative position with respect to the primary roller 10 is greater than the magnetism of the primary roller 10 at the corresponding position (that is, the magnetism of the second adsorption area in this embodiment is greater than the magnetism of the first separation area). However, in actual use, the angle of the roller is generally not very large, and the first outer roller 12 may still have a certain magnetism in the first separation area due to the magnetization phenomenon. In this way, in the first separation area, the magnetic material 71 may still be affected by the magnetic force due to the self-magnetization of the first outer roller 12 and the long-distance adsorption effect of the first adsorption area. Therefore, the magnetism of the secondary roller 20 can be set to be greater than the magnetism of the primary roller 10. This can ensure that the secondary roller 20 can smoothly adsorb the magnetic material 71 on the primary roller 10, thereby improving the separation effect.

[0097] Since the primary roller 10 and the secondary roller 20 in this embodiment are both structures composed of a fixed cylinder and a movable outer cylinder, a carbon brush ring 80 may be used to ensure better power supply.

[0098] When the production system of the present invention is actually designed, in order to further reduce the liquid content of the separated magnetic substance 71, the production system may also include a water squeezing roller 50, which is opposite to the first adsorption area of the first outer cylinder 12 of the first-level roller 10. The water squeezing roller 50 is used to cooperate with the first-level roller 10 to squeeze out the moisture in the magnetic substance 71 adsorbed on the outer surface of the first-level roller 10.

[0099] In actual use, the squeezing roller cooperates with the first-level roller 10 to generate squeezing force on the magnetic material 71, which helps to discharge the moisture carried by the magnetic material 71 and can better reduce the liquid content of the separated magnetic material 71. In actual use, the number of squeezing rollers can be set to multiple, and the multiple squeezing rollers are distributed at intervals along the circumference of the first-level roller 10. The multiple squeezing rollers can be set to form different distances with the outer surface of the first-level roller 10 to achieve multi-level extrusion.

[0100] It is conceivable that in order to further improve the squeezing drainage effect, the present invention can also add an elastic component between the squeezing roller and the first roller 10, or between the second roller 20 and the first roller 10, to produce a better squeezing drainage effect through elastic force.

[0101] In order to improve the magnetic separation efficiency, the production system of the present invention can also be provided with a rectifier plate 43, see the attached Figure 2 、 3 ,in Figure 2 The middle dotted line represents the position to which the rectifier plate 43 can swing. The mixed liquid 70 on the inlet side of the rectifier plate 43 will flow along the rectifier plate 43 in the axial direction of the first-stage drum 10, so that the liquid flow of the mixed liquid 70 can be evenly distributed within the entire axial length of the first-stage drum 10, and the mixed liquid 70 will flow through the entire length of the first-stage drum 10, that is, the outer surface of the entire length of the first-stage drum 10 can be adsorbed by the magnetic material 71, thereby avoiding the problem of low separation efficiency caused by the mixed liquid 70 being concentrated only in a local position.

[0102] The rectifier plate 43 in this embodiment can also swing with the impact force of the water flow. The swing of the rectifier plate 43 can also adjust the distance between the rectifier plate 43 and the liquid tank 40. The adjustment of this distance can also control the flow rate and achieve a better magnetic separation effect.

[0103] The production system in the present application realizes the separation of the magnetic substance 71 in the mixed liquid 70 by adopting two rollers that cooperate with each other, abandoning the structure in the prior art of scraping the adsorbed magnetic substance 71 off the magnetic roller by a scraper, and separating the magnetic substance 71 by the greater magnetic adsorption of the secondary roller 20, which can avoid the wear of the primary roller 10 and improve the service life and adsorption quality of the primary roller 10; in addition, a gap is formed between the primary roller 10 and the secondary roller 20 in this embodiment, so that the moisture carried by the magnetic substance 71 can fall from the space, reducing the liquid content of the recovered magnetic substance 71, and reducing the processing time and economic cost of the separated magnetic substance 71. Moreover, through the above-mentioned magnetic separation method, the corresponding parameters can be adjusted according to different working conditions during the separation process to ensure that the magnetic substance content and liquid content are within the required range, thereby improving the separation efficiency and separation quality.

[0104] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A magnetic separation method, characterized in that: A main control module for a production system, the production system comprising a primary roller and a secondary roller, both of which are used to adsorb magnetic materials, the outer surface of the secondary roller being opposite to the outer surface of the primary roller and forming a gap, the magnetic separation method comprising the following steps: obtaining the content of magnetic material in the mixed liquid after it passes through the first-stage drum; When the magnetic substance content is greater than a preset content, the first actuator is controlled to reduce the flow rate of the mixed liquid passing through the primary drum, so that the primary drum can separate the mixed liquid passing through the primary drum to a level where the magnetic substance content is less than the preset content; wherein the preset content ranges from 0.04% to 0.06%; Obtain the liquid content of the magnetic material separated from the secondary roller, When the liquid content of the magnetic material is greater than a preset liquid content, the second actuator is controlled to operate so as to reduce the gap between the outer surface of the first roller and the outer surface of the second roller; The production system includes a liquid inlet, through which the mixed liquid flows to the outer surface of the first-stage roller. The first actuator includes a first driving member and a gap adjustment plate. The gap adjustment plate is connected to the output end of the first driving member to move under the drive of the first driving member. When the content of the magnetic substance is greater than a preset content, controlling the first actuator to reduce the flow of the mixed liquid through the first-stage roller includes: controlling the first driving member to drive the gap adjustment plate to move to increase the shielding of the adjustment plate on the liquid inlet.

2. The separation method according to claim 1, wherein When the liquid content of the magnetic material is greater than a preset liquid content, controlling the second actuator to reduce the gap between the outer surface of the first roller and the outer surface of the second roller includes: controlling the second actuator to move the second roller toward the first roller.

3. The separation method according to any one of claims 1 to 2, characterized in that The range of the gap is 0 to 5 mm, and the preset liquid content is 20% to 30%.

4. A main control module, characterized in that: include: one or more processors; A memory having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors, the one or more processors implement the magnetic separation method according to any one of claims 1 to 3.

5. A computer-readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the magnetic separation method according to any one of claims 1 to 3 is implemented.

6. A production system, characterized in that: The invention comprises production equipment, a primary roller (10), a secondary roller (20) and a liquid tank (40), wherein the input end of the liquid tank (40) is connected to the mixed liquid discharge port of the production equipment, at least a portion of the outer surface of the primary roller (10) is immersed in the mixed liquid (70) in the liquid tank (40), the primary roller (10) can magnetically adsorb the magnetic substance (71) in the mixed liquid (70), the outer surface of the secondary roller (20) is opposite to the outer surface of the primary roller (10) and forms a gap, the secondary roller (20) can adsorb the magnetic substance (71) from the primary roller (10), and the production system further comprises a magnetic substance content detection device and a magnetic substance liquid content detection device and the main control module described in claim 4, wherein the magnetic substance content detection device and the magnetic substance liquid content detection device can send the detected magnetic substance content and magnetic substance water content of the mixed liquid (70) to the main control module.

7. The production system according to claim 6, wherein: The production system includes a second actuator, the second actuator includes a second driving member, the output end of the second driving member is connected to the secondary roller (20), and can drive the secondary roller (20) to move toward the primary roller (10), and the second driving member is communicatively connected to the main control module.

8. The production system according to claim 6 or 7, characterized in that The liquid tank (40) includes a tank body, and a liquid inlet is formed between the outer surface of the first-level roller (10) and the tank body. The production system includes a first actuator, and the first actuator includes a first driving member and a gap adjustment plate. The gap adjustment plate is connected to the output end of the first driving member. The gap adjustment plate (44) is slidably arranged on the tank body, and one end of the gap adjustment plate (44) extends into the liquid inlet. The first driving member is communicatively connected to the main control module, and the first driving member can drive the gap adjustment plate (44) to slide and cover the liquid inlet.

Images