Air-flush distribution disc, magnetic powder feeding device and method thereof

Abstract

The application discloses a gas flushing distribution disc, a magnetic powder feeding device and a method thereof, and belongs to the technical field of sewage treatment. The gas flushing distribution disc is characterized by a hollow cavity surrounded by an upper surface, a lower surface and a side wall. The upper surface is provided with a connecting port. The lower surface is provided with a hollow gas distribution cover. The top of the gas distribution cover is provided with an opening for connecting a gas source. A plurality of gas distribution holes are arranged on the peripheral wall of the gas distribution cover. A plurality of through material distribution holes are arranged on the lower surface. The material enters the inner cavity through the connecting port, is uniformly distributed on the lower surface of the gas flushing distribution disc by the gas flow sprayed from the gas distribution holes, and finally falls through the material distribution holes. The caking phenomenon of the material can be effectively eliminated to ensure the uniformity of the material feeding. Meanwhile, the inclined arrangement of the material distribution holes enables the gas flow sprayed from the gas distribution holes to more smoothly enter the material distribution holes, so that the falling efficiency of the material can be ensured even when the diameter of the material distribution holes is small, and the blockage can be prevented.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and more specifically, relates to an air-flushing distribution plate, a magnetic powder dosing device, and a method thereof. Background Technology

[0002] In the field of wastewater treatment, magnetic powder dosing devices are commonly used in magnetic coagulation sedimentation technology. These devices add magnetic powder to the coagulation loading zone, allowing it to flocculate and bind with pollutants. This enhances the coagulation and flocculation effects, resulting in flocs with higher density and stronger compactness, thus achieving rapid sedimentation. However, traditional magnetic powder dosing methods rely heavily on manual operation, directly pouring entire bags of magnetic powder into the water. This method makes precise control of the amount of magnetic powder added difficult, posing a risk of overdosing. Excessive magnetic powder not only leads to waste but also increases water turbidity, as too much powder cannot effectively bind with suspended solids in a short time, affecting the flocculant's adsorption effect on pollutants. Furthermore, the magnetic field generated by excessive magnetic powder may also affect the stability of the flocs, resulting in reduced treatment efficiency.

[0003] To address the above issues, existing solutions have proposed a series of approaches:

[0004] Patent CN210795873U discloses an automatic quantitative magnetic powder addition device. In this application, through the cooperation of magnetic powder concentration detection and magnetic powder components, magnetic powder can be added to wastewater in a timely manner. Furthermore, the magnetic powder is fed by a screw conveyor, which allows for better control of the amount of magnetic powder added, avoiding a series of problems caused by excessive magnetic powder input.

[0005] Patent CN217756975U discloses an intelligent magnetic powder addition device. This application utilizes the principle of conductivity difference to calculate the magnetic powder content in the system by monitoring the conductivity difference between reaction tank T1 (without magnetic powder) and reaction tank T2 (with magnetic powder). This eliminates the influence of fluctuations in incoming water quality on the test results, and automatically initiates the addition of magnetic powder when the content is insufficient, improving the level of automation and allowing for accurate control of the addition amount.

[0006] While the above-mentioned improved solutions can control the amount of magnetic powder added based on monitoring results, the sudden increase in the amount of magnetic powder added initially can cause it to clump, resulting in uneven distribution and potentially affecting subsequent flocculation. To address this issue, patent CN111847606A discloses a wet magnetic powder addition system and method. In this application, magnetic powder and water are mixed evenly in a magnetic powder premixing unit to obtain a magnetic powder mixture, which is then piped to various wastewater treatment systems. One magnetic powder premixing unit can be used for multiple wastewater treatment systems, significantly reducing costs. Furthermore, adding the magnetic powder mixture to the wastewater treatment system, rather than directly adding magnetic powder, can accelerate the mixing efficiency of magnetic powder and wastewater to some extent. However, the industry still needs more diverse and sophisticated designs to solve the problem of uneven magnetic powder addition. Especially with recycled magnetic powder, its higher moisture content makes it more prone to clumping, further complicating the uniform addition of magnetic powder. Summary of the Invention

[0007] 1. The problem to be solved

[0008] In view of at least some of the problems existing in the prior art, the present invention proposes an air-pumped distribution plate, a magnetic powder feeding device and method, the purpose of which is to solve the problem of uneven magnetic powder feeding in existing magnetic powder feeding devices.

[0009] 2. Technical Solution

[0010] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0011] An air-pumping distribution plate of the present invention includes a hollow cavity formed by an upper surface, a lower surface and a side wall. The upper surface is provided with a connection port, and the lower surface is provided with a hollow air distribution hood. The top opening of the air distribution hood is used to connect an air source. The peripheral wall of the air distribution hood is provided with a plurality of air distribution holes.

[0012] The lower surface is provided with several through-holes for distributing materials, and the inlet end of the distributing material hole is closer to the air distribution hood than the outlet end.

[0013] The material enters the inner cavity through the connection port, and the airflow ejected from the air distribution hole evenly distributes the material on the lower surface of the air-jet distribution plate, and finally falls through the material distribution hole.

[0014] In some embodiments, a discharge groove is provided around the side wall of the air-jet distribution plate, and the discharge area of ​​the discharge groove is larger than that of the distribution hole.

[0015] In some embodiments, the discharge trough is V-shaped, and the width of the notch formed on the outer side of the sidewall is smaller than the width on the inner side of the sidewall.

[0016] In some embodiments, the diameter of the dispensing hole is 5-15 mm, and the inclination angle α is 30-45°.

[0017] A magnetic powder feeding device of the present invention includes a mixing chamber, wherein a first feeding chamber is connected to the mixing chamber via a first inlet thereon, and a stirrer is provided inside the mixing chamber;

[0018] The bottom of the mixing chamber is provided with the aforementioned air-jet distribution plate, wherein the air-jet distribution plate is connected to the discharge end of the mixing chamber through a connection port.

[0019] In some embodiments, the first feeding hopper is connected to a first feed pipe and a dust removal pipe; wherein, the first feed pipe is connected to the feed inlet on the first feeding hopper along the tangential direction of the outer peripheral wall of the first feeding hopper; and the dust removal pipe is connected to the dust removal port opened at the top of the first feeding hopper.

[0020] In some embodiments, the mixing chamber is further provided with a first air inlet pipe, and the air outlet of the first air inlet pipe is provided with a heating element; a vibrating screen is provided at the discharge port of the first feeding chamber.

[0021] In some embodiments, the mixing chamber is further provided with a second inlet for connecting to a second feeding chamber, and the inlet of the second feeding chamber is provided with a pneumatic dispersion disc;

[0022] The pneumatic dispersion disc is provided with an air storage chamber, and the air storage chamber is connected to a second air inlet pipe through an air inlet on it.

[0023] The gas storage chamber is connected to several annularly distributed and downwardly extending gas outlet channels; the pneumatic dispersion disc is provided with a through hole for the second feed pipe to pass through, the second feed pipe is located in the area surrounded by several gas outlet channels, and the discharge end of the second feed pipe does not exceed the discharge end of the gas outlet channel.

[0024] In some embodiments, the outlet end of the air outlet channel is inclined toward the center of the pneumatic dispersion disk.

[0025] The first and second feed inlets are both located within the mixing range of the agitator, and the mixing chamber is connected to an overflow pipe.

[0026] The present invention provides a method for adding magnetic powder, comprising the following steps:

[0027] The newly added dry magnetic powder enters the first feeding hopper through the first feed pipe; wherein, the first feed pipe is connected to the first feeding hopper along the tangential direction of the outer peripheral wall of the first feeding hopper, thereby forming a vortex in the first feeding hopper to disperse the dry magnetic powder; at the same time, impurities with a smaller specific gravity in the dry magnetic powder will be discharged from the dust removal pipe with the rising airflow, and finally the dry magnetic powder will fall into the mixing hopper;

[0028] The recovered wet magnetic powder enters the annular area formed by several air outlet channels through the second feed pipe. The airflow blown out by the air outlet channels disperses and dehumidifies the wet magnetic powder, which finally falls into the mixing chamber.

[0029] After the dry and wet magnetic powders enter the mixing chamber, they are first dispersed and mixed by the stirrer; at the same time, the mixed magnetic powders exchange heat with the hot airflow heated by the heating element, so that the magnetic powders are demagnetized by heating.

[0030] The mixed magnetic powder continues to fall into the inner cavity of the air-pumping distribution plate, where it is dispersed again by the airflow ejected from the air distribution hole. The mixed magnetic powder eventually falls through the material distribution hole and the discharge chute and enters the coagulation loading zone.

[0031] 3. Beneficial effects

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] (1) The pneumatic distribution plate of the present invention, through the setting of the air distribution hood and the material distribution hole, after the material enters the inner cavity of the pneumatic distribution plate, the material is dispersed by the airflow sprayed from the air distribution hole and finally falls through the material distribution hole, which can effectively eliminate the agglomeration of the material and ensure the uniformity of the material input. At the same time, with the inclined setting of the material distribution hole, the airflow sprayed from the air distribution hole can enter the material distribution hole more smoothly, so as to ensure the material falling efficiency when the diameter of the material distribution hole is small, and prevent blockage, thereby achieving the purpose of balancing the feeding efficiency and uniformity.

[0034] (2) In a pneumatic distribution plate of the present invention, a discharge groove is provided around the side wall of the pneumatic distribution plate, and the discharge area of ​​the discharge groove is larger than that of a single distribution hole. When the distribution hole cannot meet the material feeding speed, the material is blown to the discharge groove and can continue to be fed, so as to prevent the material from accumulating at the edge of the inner cavity of the pneumatic distribution plate; at the same time, after the material is blown out by the gas from the discharge groove, it is beneficial to increase the throwing radius of the material, which is also beneficial to the dispersion of the material.

[0035] (3) A magnetic powder feeding device of the present invention has a first feed inlet connected to a mixing chamber, and the bottom of the mixing chamber is provided with an air-pumping distribution plate. The magnetic powder first enters the mixing chamber for stirring and dispersion, and then is dispersed a second time by the air-pumping distribution plate. This can effectively avoid the agglomeration of magnetic powder and ensure the uniformity of magnetic powder feeding.

[0036] (4) In a magnetic powder feeding device of the present invention, the first feed pipe is connected to the feed port on the first feed bin along the tangential direction of the outer peripheral wall of the first feed bin. When the magnetic powder enters the first feed bin under pneumatic conveying, it will form a swirling flow along the inner wall of the first feed bin. On the one hand, it can disperse the magnetic powder and prevent agglomeration; on the other hand, some impurities with a small specific gravity, such as dust, will be discharged from the dust removal pipe with the rising airflow, thereby achieving the effect of removing impurities from the magnetic powder.

[0037] (5) In a magnetic powder feeding device of the present invention, a heating element is provided at the outlet end of the first air inlet pipe, which can heat the inside of the mixing chamber to reduce the magnetism of the magnetic powder and prevent the magnetic powder from clumping. At the same time, the first feed port and the second feed port are both located within the stirring range of the stirrer, which can more fully stir the falling magnetic powder, making the magnetic powder more evenly heated, which is beneficial to the demagnetization of the magnetic powder.

[0038] (6) A magnetic powder feeding device of the present invention, by setting a second feeding bin, is specifically used for feeding recycled magnetic powder, which can avoid the phenomenon of clumping between recycled magnetic powder with a certain amount of moisture and newly added magnetic powder; at the same time, the recycled magnetic powder can be blown dry and dispersed by a pneumatic dispersion plate. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of an air-jet distribution plate for an invention;

[0040] Figure 2 This is a bottom view of an air-pumping distribution plate according to the present invention;

[0041] Figure 3 This is a schematic diagram showing the tilt direction of the material distribution hole in this invention;

[0042] Figure 4 This is a schematic diagram of the structure of a magnetic powder feeding device according to the present invention;

[0043] Figure 5 This is a schematic diagram of the internal structure of a magnetic powder feeding device according to the present invention;

[0044] Figure 6 This is a schematic diagram of the pneumatic dispersion disk in this invention;

[0045] Figure 7 This is a schematic diagram of the internal structure of the pneumatic dispersion disk in this invention.

[0046] In the diagram: 100, mixing chamber; 110, first feed inlet; 120, second feed inlet; 130, overflow pipe; 140, agitator; 150, first air inlet pipe; 160, heating element;

[0047] 200. First feeding bin; 210. First feed pipe; 220. Dust removal pipe; 230. Vibrating screen; 300. Second feeding bin;

[0048] 400, Air-jet distribution plate; 410, Air distribution hood; 420, Air distribution hole; 430, Material distribution hole; 440, Connection port; 450, Discharge chute;

[0049] 500, Pneumatic dispersion disc; 510, Air storage chamber; 520, Air outlet channel; 530, Air inlet; 540, Second feed pipe; 550, Through hole; 560, Second air inlet pipe; 570, Lug. Detailed Implementation

[0050] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0051] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] The present invention will be further described below with reference to specific embodiments.

[0053] Example 1

[0054] like Figure 1 , Figure 2 As shown, the air-pumping distribution plate 400 of this embodiment has an overall disc-shaped structure, including an upper surface, a lower surface, and side walls, which together form a hollow cavity. The upper surface of the air-pumping distribution plate 400 has a connection port 440 for material to enter and fall into the cavity. The lower surface has an air distribution hood 410, which is a cylindrical hollow structure with an opening at the top for connecting to an air source pipe. The peripheral wall of the air distribution hood 410 has several air distribution holes 420. Simultaneously, several through-type material distribution holes 430 are distributed on the lower surface of the air-pumping distribution plate 400.

[0055] During operation, the material enters the inner cavity through the connection port 440, and then the airflow ejected from the air distribution hole 420 distributes the material evenly on the lower surface of the air-pumping distribution plate 400. Finally, the material falls through the distribution hole 430 to eliminate the clumping of the material and ensure the uniform feeding of the material.

[0056] For some powdery or granular materials that are prone to caking, the diameter of the distributing orifice 430 cannot be too large to ensure uniform feeding. However, a smaller orifice diameter can easily cause bridging and blockage when the powder is added, due to the larger accumulation of material. Although the airflow from the air distribution orifice 420 can improve bridging and blockage, a certain risk of blockage still exists. Furthermore, the smaller orifice diameter inevitably affects the feeding efficiency.

[0057] Therefore, in this embodiment, a discharge trough 450 is provided around the side wall of the air-pumped distribution plate 400, and the discharge area of ​​the discharge trough 450 is larger than that of a single distribution hole 430. This design allows for material accumulation when the distribution hole 430 cannot meet the material's feeding speed; the material is then blown into the discharge trough 450 for continued feeding. Simultaneously, the material being ejected from the discharge trough 450 by the gas effectively increases the material's throwing radius, which also facilitates uniform material feeding. Of course, the material being dispersed into the discharge trough 450 also helps reduce the risk of material blockage.

[0058] In some embodiments, the discharge chute 450 has an overall V-shaped structure, and the width of the notch formed on the outer side wall of the discharge chute 450 is smaller than the width of the notch on the inner side wall, in order to further ensure the uniformity of material input. It should be noted that the width here refers to the dimension of the corresponding notch along the circumference of the side wall of the air-jet distribution plate 400.

[0059] Furthermore, for some ultrafine powders, such as magnetic powder, if the diameter of the dispensing hole 430 is too small, the powder is prone to agglomeration or adhesion, leading to increased flow resistance, which is not conducive to the powder's descent and may even cause blockage of the dispensing hole 430. Of course, to address the issue of small apertures hindering material descent, an additional vibration device can be installed to facilitate material feeding, but this is clearly detrimental to equipment cost control. Conversely, if the diameter of the dispensing hole 430 is too large, it is beneficial to the smoothness of powder descent and feeding efficiency, but an excessively large aperture is detrimental to the uniformity of material descent.

[0060] Regarding the aforementioned issue of the inability to effectively balance material feeding efficiency and uniformity, refer to... Figure 3 As shown, in this embodiment, the material distribution hole 430 is inclined towards the air distribution hood 410, meaning the inlet of the material distribution hole 430 is closer to the air distribution hood 410 than the outlet. This design allows the diverted airflow to more easily enter the material distribution hole 430 when the main airflow from the air distribution hole 420 is diverted through it. This not only prevents material blockage but also improves material falling efficiency. In other words, the inclined arrangement of the material distribution hole 430, combined with the airflow from the air distribution hole 420, can effectively push the material. Therefore, the diameter of the material distribution hole 430 can be set smaller to balance material falling efficiency and uniformity.

[0061] Furthermore, if the inclination angle α of the distribution hole 430 is too small, the inner wall of the distribution hole 430 will be relatively flat. This undoubtedly increases the frictional resistance between the material and the hole wall. In addition, the material itself has a certain degree of adhesion, which significantly hinders the smooth falling of the material. Conversely, if the inclination angle α of the distribution hole 430 is too large, that is, the inner wall of the distribution hole 430 will be steeper. This will weaken the pushing effect of the branch airflow on the material, which is also not conducive to improving the material feeding efficiency.

[0062] Therefore, in this embodiment, the tilt angle α of the dispensing hole 430 is controlled between 30-45°, for example, 32°, 38°, 42°, etc.; preferably 35-40°. Simultaneously, the diameter of the dispensing hole 430 is controlled between 5-15mm, for example, 6mm, 7mm, 9mm, 12mm, 14mm, etc.; preferably 8-12mm. In this embodiment, by controlling the tilt angle α and the diameter of the dispensing hole 430, the material feeding efficiency and uniformity are maximized simultaneously.

[0063] Specifically, in this embodiment, the connection port 440 is a circular opening, and the vertical projections of the center of the connection port 440, the center of the air distribution hood 410, and the center of the air jet distribution plate 400 coincide with each other, and a number of material distribution holes 430 are arranged in a ring array with the air distribution hood 410 as the center.

[0064] Example 2

[0065] like Figure 4 , Figure 5 As shown, this embodiment provides a magnetic powder feeding device, which includes a mixing chamber 100 and a stirrer 140 disposed within the mixing chamber 100. The mixing chamber 100 is connected to a first feeding chamber 200 via a first inlet 110, and the first feeding chamber 200 is connected to a first feed pipe 210. Simultaneously, the bottom of the mixing chamber 100 is also provided with an air-pumping distribution plate 400 as described in Embodiment 1; wherein, the air-pumping distribution plate 400 is connected to the discharge end of the mixing chamber 100 via a connection port 440.

[0066] During operation, the magnetic powder first enters the mixing chamber 100 for stirring and dispersion, and then is further dispersed by the air-pumped distribution plate 400. This effectively avoids the clumping of the magnetic powder and ensures the uniformity of the magnetic powder input.

[0067] In some embodiments, a feed inlet is provided on the first feeding bin 200, and a first feed pipe 210 is connected to the feed inlet along the tangential direction of the outer peripheral wall of the first feeding bin 200. Furthermore, a dust removal port for connecting a dust removal pipe 220 is provided at the top of the first feeding bin 200.

[0068] Since the first feeding bin 200 is set along the tangential direction, when the magnetic powder enters the first feeding bin 200 under pneumatic conveying, it will form a swirling flow along the inner wall of the first feeding bin 200. On the one hand, it can disperse the magnetic powder and prevent it from clumping; on the other hand, some impurities with a small specific gravity, such as dust, will be discharged from the dust removal pipe 220 with the rising airflow, thereby achieving the effect of removing impurities from the magnetic powder.

[0069] In some embodiments, the mixing chamber 100 is further provided with a first air inlet pipe 150, and the air outlet end of the first air inlet pipe 150 is provided with a heating element 160 for heating the internal space of the mixing chamber 100 to reduce the magnetism of the magnetic powder and also prevent the magnetic powder from clumping.

[0070] Meanwhile, a vibrating screen 230 is provided at the discharge port of the first feeding bin 200 to filter out larger impurities and prevent them from entering the mixing bin 100.

[0071] Preferably, the first feed inlet 110 is located within the stirring range of the stirrer 140, which allows for more thorough stirring of the falling magnetic powder and more uniform heating of the magnetic powder, thus facilitating demagnetization. It is worth noting that the heating component 160, vibrating screen 230, and stirrer 140 in this embodiment are all existing technologies and can be purchased directly from the market according to actual needs; their structure and working principle are not described here.

[0072] Specifically, in this embodiment, the dust removal pipe 220 is located at the center of the top of the first feeding hopper 200, and the connection between the first feed pipe 210 and the first feeding hopper 200 is located near the top of the first feeding hopper 200.

[0073] This embodiment of a magnetic powder feeding device controls the feeding direction of magnetic powder through a first feed pipe 210, a heating component 160 heats and demagnetizes the magnetic powder, a stirrer 140 stirs and disperses the magnetic powder, and an air-puffing distribution plate 400 provides an air-puffing effect. This can prevent the magnetic powder from clumping to the maximum extent and ensure the uniform feeding of magnetic powder.

[0074] Example 3

[0075] This embodiment of the magnetic powder feeding device, based on the above embodiment, further includes a second feeding bin 300 for adding recycled magnetic powder, while the original first feeding bin 200 is used to add new magnetic powder. Since the recycled magnetic powder has a high moisture content, the separate addition of new dry magnetic powder and recycled wet magnetic powder through the two feeding bins effectively prevents clumping between the dry and wet magnetic powders.

[0076] Specifically, refer to Figure 5As shown, the top of the mixing chamber 100 is provided with a second feed inlet 120, and the second feeding chamber 300 is connected to the mixing chamber 100 through the second feed inlet 120. Preferably, the second feed inlet 120 is located within the mixing range of the agitator 140.

[0077] Meanwhile, an overflow pipe 130 is also connected to the mixing chamber 100 to discharge the water vapor generated during the magnetic powder drying process. Preferably, the overflow pipe 130 is located near the second feed inlet 120.

[0078] In some embodiments, the top of the second feeding hopper 300 has a feed inlet, and the feed inlet contains a pneumatic dispersion disc 500 for breaking up agglomerated wet magnetic powder. Specifically, as shown... Figure 6 , Figure 7 As shown, the pneumatic dispersion disc 500 has a through hole 550 for the second feed pipe 540 to pass through. The pneumatic dispersion disc 500 has an air storage chamber 510, which is connected to a second air inlet pipe 560 via an air inlet 530. Simultaneously, the air storage chamber 510 is connected to several annularly distributed and downwardly extending air outlet channels 520, and the second feed pipe 540 is located within the area enclosed by the several air outlet channels 520.

[0079] In this embodiment, the pneumatic dispersion disc 500, through the airflow blown out by the air outlet channel 520, can not only disperse the recovered wet magnetic powder, providing a basis for the uniform addition of wet magnetic powder in the later stage, but also dehumidify the dehumidified magnetic powder, thereby facilitating the dispersion of the magnetic powder.

[0080] In some embodiments, the outlet end of the air outlet channel 520 is inclined towards the center of the pneumatic dispersion disk 500, and the outlet end of the second feed pipe 540 does not exceed the outlet end of the air outlet channel 520. This design ensures that the magnetic powder falls into the surrounding ring-shaped airflow after falling from the second feed pipe 540, which is beneficial for dispersing and dehumidifying the wet magnetic powder.

[0081] Specifically, in this embodiment, the first feeding bin 200 and the second feeding bin 300 are symmetrically distributed around the center line of the mixing bin 100, and each of the two feeding bins has a conical section at its lower part. The area between the two conical sections is the central area of ​​the mixing bin 100. The outlet of the first air inlet pipe 150 can be connected to the inner cavity of the mixing bin 100 through this central area to ensure that the hot airflow can enter from the center of the mixing bin 100. At the same time, the stirrer 140 is also located in the central area. On the one hand, it is necessary to ensure that the stirrer 140 can simultaneously disperse the magnetic powder falling from the two feeding bins. On the other hand, the stirrer 140 can be used to disturb the incoming hot airflow, so that it can heat and demagnetize the magnetic powder relatively evenly.

[0082] Meanwhile, to facilitate the fixing of the pneumatic dispersion disc 500, a perforated lug 570 is provided on the side wall of the pneumatic dispersion disc 500, and the pneumatic dispersion disc 500 can be fixed to the top of the second feeding bin 300 using locking bolts. Of course, a mounting hole needs to be opened at the corresponding position on the top of the second feeding bin 300.

[0083] The working process and principle of the magnetic powder addition device in this embodiment are as follows:

[0084] The newly added dry magnetic powder enters the first feeding hopper 200 through the first feed pipe 210, which is set in a tangential direction, and forms a swirling flow in the first feeding hopper 200, which can disperse the dry magnetic powder once; at the same time, impurities with a smaller specific gravity in the dry magnetic powder can be discharged through the dust removal pipe 220; finally, the dry magnetic powder falls into the mixing hopper 100 after being screened by the vibrating screen 230.

[0085] The recovered wet magnetic powder enters the area surrounded by several air outlet channels 520 through the second feed pipe 540. The airflow blown out by the air outlet channels 520 disperses and dehumidifies the wet magnetic powder, and finally falls into the mixing chamber 100.

[0086] After the dry and wet magnetic powders enter the mixing chamber 100, they are first dispersed and mixed by the stirrer 140. At the same time, the mixed magnetic powders exchange heat with the hot airflow heated by the heating element 160, causing the magnetic powders to be demagnetized by heat. The water vapor generated in this process can be discharged through the overflow pipe 130.

[0087] The mixed magnetic powder continues to fall into the inner cavity of the air-pumping distribution plate 400, where it is dispersed again by the airflow ejected from the air distribution hole 420. The mixed magnetic powder will fall through the material distribution hole 430 and the discharge chute 450, and finally enter the coagulation loading zone.

[0088] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A magnetic powder feeding device, comprising a mixing chamber (100), wherein the mixing chamber (100) is connected to a first feeding chamber (200) via a first inlet (110), and a stirrer (140) is provided inside the mixing chamber (100), characterized in that: The bottom of the mixing chamber (100) is provided with an air-flushing distribution plate (400), wherein, The air-pumping distribution plate (400) includes a hollow cavity formed by an upper surface, a lower surface and a side wall. The upper surface is provided with a connection port (440), and the lower surface is provided with a hollow air distribution hood (410). The top opening of the air distribution hood (410) is used to connect to an air source. The peripheral wall of the air distribution hood (410) is provided with a plurality of air distribution holes (420). The lower surface is provided with several through material distribution holes (430), and the inlet end of the material distribution hole (430) is closer to the air distribution hood (410) than the outlet end. The material enters the inner cavity through the connection port (440), and the airflow ejected from the air distribution hole (420) distributes the material evenly on the lower surface of the air-pumping distribution plate (400), and finally falls through the material distribution hole (430). The side wall of the air-pumping distribution plate (400) is provided with a discharge groove (450), and the discharge area of ​​the discharge groove (450) is larger than that of the distribution hole (430). The discharge trough (450) is V-shaped in general, and the width of the notch formed on the outer side of the sidewall of the discharge trough (450) is smaller than the width on the inner side of the sidewall. The diameter of the material distribution hole (430) is 5~15mm, and the inclination angle α is 30-45°; The air-jet distribution plate (400) is connected to the discharge end of the mixing chamber (100) via a connection port (440); The mixing chamber (100) is also provided with a second inlet (120) for connecting to the second feeding chamber (300), and the inlet of the second feeding chamber (300) is provided with a pneumatic dispersion disc (500). The pneumatic dispersion disc (500) is provided with an air storage chamber (510), and the air storage chamber (510) is connected to a second air inlet pipe (560) through an air inlet (530). The gas storage chamber (510) is connected to several gas outlet channels (520) that are arranged in a ring and extend downward as a whole.

2. The magnetic powder feeding device according to claim 1, characterized in that: The first feeding hopper (200) is connected to a first feed pipe (210) and a dust removal pipe (220); wherein, the first feed pipe (210) is connected to the feed inlet on the first feeding hopper (200) along the tangential direction of the outer peripheral wall of the first feeding hopper (200); the dust removal pipe (220) is connected to the dust removal port opened at the top of the first feeding hopper (200).

3. The magnetic powder feeding device according to claim 2, characterized in that: The mixing chamber (100) is also provided with a first air inlet pipe (150), and the air outlet of the first air inlet pipe (150) is provided with a heating element (160); the discharge port of the first feeding chamber (200) is provided with a vibrating screen (230).

4. The magnetic powder feeding device according to claim 3, characterized in that: The pneumatic dispersion disc (500) is provided with a through hole (550) through which the second feed pipe (540) passes. The discharge end of the second feed pipe (540) extends into the area surrounded by a plurality of air outlet channels (520), and the discharge end does not exceed the air outlet end of the air outlet channel (520).

5. The magnetic powder feeding device according to claim 4, characterized in that: The air outlet end of the air outlet channel (520) is inclined towards the center of the pneumatic dispersion disk (500); The first feed inlet (110) and the second feed inlet (120) are both located within the mixing range of the agitator (140), and the mixing chamber (100) is connected to an overflow pipe (130).

6. A method for adding magnetic powder using the magnetic powder adding device as described in claim 5, characterized in that: Includes the following steps, The newly added dry magnetic powder enters the first feeding hopper (200) through the first feed pipe (210); wherein, the first feed pipe (210) is connected to the first feeding hopper (200) along the tangential direction of the outer peripheral wall of the first feeding hopper (200), thereby forming a vortex in the first feeding hopper (200) to disperse the dry magnetic powder; at the same time, impurities with a smaller specific gravity in the dry magnetic powder will be discharged from the dust removal pipe (220) with the rising airflow, and finally the dry magnetic powder will fall into the mixing hopper (100); The recovered wet magnetic powder enters the annular area surrounded by several air outlet channels (520) through the second feed pipe (540). The airflow blown out by the air outlet channels (520) is used to disperse and dehumidify the wet magnetic powder. The wet magnetic powder finally falls into the mixing chamber (100). After the dry magnetic powder and wet magnetic powder enter the mixing chamber (100), they are first dispersed and mixed by the stirrer (140); at the same time, the mixed magnetic powder exchanges heat with the hot air flow heated by the heating element (160), so that the magnetic powder is demagnetized by heating. The mixed magnetic powder continues to fall into the inner cavity of the air-pumping distribution plate (400), where it is dispersed again by the airflow ejected from the air distribution hole (420). The mixed magnetic powder will eventually fall through the material distribution hole (430) and the discharge chute (450) and enter the coagulation loading zone.

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