A device for removing residual magnetic powder in a powder

Abstract

The utility model relates to powder material processing technical field relates to a kind of for removing the device of magnetic powder residue in powder, including conveying auger, primary magnetic rod bin, secondary magnetic rod bin and vibrating screen, conveying auger discharge port is connected with primary magnetic rod bin feed end, primary magnetic rod bin discharge end is connected secondary magnetic rod bin, secondary magnetic rod bin discharge end is connected vibrating screen, magnetic rod group one in primary magnetic rod bin is perpendicular to conveying direction, magnetic rod group two in secondary magnetic rod bin is parallel to conveying direction.The utility model preliminary demagnetization by primary transverse magnetic field, secondary longitudinal magnetic field captures tiny magnetic powder, two-stage cooperation avoids magnetic impurity influence quality;Vibrating screen further screens non-magnetic impurities, without additional equipment, simplify process and guarantee powder purity, satisfy the demand in food, pharmaceutical and other fields.

Description

Technical Field

[0001] This utility model relates to the field of powder material processing technology, and to a device for removing magnetic powder residue from powder. Background Technology

[0002] Thickening and stabilizing agents (such as carrageenan, gelatin, xanthan gum, pectin, etc.) are a class of natural polymers that can combine with water to form viscous solutions or gels. They are widely used in: the food industry as thickeners and stabilizers; the pharmaceutical field as tablet excipients, soft capsule matrices, and drug controlled-release carriers; and cosmetics and personal care as texture modifiers for lotions, face masks, toothpaste, etc.

[0003] During the production of thickener stabilizers, the following processes can generate magnetic powder: during the raw material extraction stage, when processing plant or animal-derived raw materials, metal parts of crushing equipment (such as crushers and grinders) wear off and shed iron filings; during the drying and screening stage, heat exchangers and conveying pipelines of high-temperature drying equipment generate tiny metal particles due to corrosion; and during external storage or transportation, contact with metal containers and tools, or the settling of metal dust in the production environment can also generate magnetic powder.

[0004] Currently, industry quality and regulatory standards have clear requirements for the content of magnetic powder residue: China's GB2760 and GB / T22326 specify that the content of metallic foreign matter (such as iron and magnetic particles) in food-grade thickeners and stabilizers should be ≤0.5mg / kg; the EU's EC Regulation 1925 / 2006 and the US FDA require that the content of magnetic foreign matter in pharmaceutical excipients be ≤0.1ppm (for specific high-purity applications).

[0005] Demagnetization can optimize the magnetic powder content in thickener and stabilizer powder, improving the foreign body sensation and gel structure damage that magnetic particles may cause in food. It also avoids the risk of magnetic particles clogging mixing equipment and pipes, as friction between metal particles during high-speed stirring may cause static electricity or localized heating, leading to the risk of carbonization of the gel powder. Utility Model Content

[0006] This invention addresses the problems of existing technologies by providing a device for removing magnetic powder residue from powder.

[0007] The purpose of this utility model can be achieved through the following technical solution: a device for removing magnetic powder residue from powder, comprising: a conveying auger, a primary magnetic rod bin, a secondary magnetic rod bin, and a vibrating screen; The upper end of the conveying auger is provided with a feeding port for feeding the powder to be processed and the lower end is provided with a discharging port for discharging the powder. The discharging port is fixedly connected to the feeding end of the primary magnetic rod bin, so that the powder conveyed by the conveying auger can directly enter the primary magnetic rod bin. The discharge end of the primary magnetic rod bin is fixedly connected to the feed end of the secondary magnetic rod bin, and the discharge end of the secondary magnetic rod bin is connected to the feed end of the vibrating screen. The first-stage magnetic rod compartment is equipped with a magnetic rod assembly, and the installation direction of the magnetic rod assembly is perpendicular to the powder conveying direction of the conveying auger. The secondary magnetic rod compartment is equipped with a second set of magnetic rods, and the installation direction of the second set of magnetic rods is parallel to the powder conveying direction of the auger.

[0008] In a further improvement, the magnetic rod assembly is provided with six layers of magnetic rods. The number of magnetic rods in the six layers is arranged alternately from bottom to top with three and four rods. The spacing between adjacent layers of magnetic rods is consistent to ensure that the powder can flow evenly through each layer of magnetic rods.

[0009] In a further improvement, the second magnetic rod assembly is provided with six layers of magnetic rods, and the number of magnetic rods in the six layers is arranged alternately from bottom to top with three and four rods, and the spacing between adjacent layers of magnetic rods is consistent.

[0010] In a further improvement, both the primary and secondary magnetic rod compartments are equipped with magnetic rod fixing frames, and the magnetic rod fixing frames are provided with circular slots that are adapted to the diameter of the magnetic rods.

[0011] In a further improvement, a flange is provided at the connection between the primary magnetic rod compartment and the secondary magnetic rod compartment, and the two are detachably fixedly connected by the flange, with a sealing gasket sandwiched between the flanges.

[0012] As a further improvement, an elastic connector is provided between the vibrating screen and the discharge end of the secondary magnetic rod bin.

[0013] Compared with the prior art, the present invention has the following advantages: The first-stage magnetic rod chamber of the present invention relies on the transverse magnetic field to initially remove most of the magnetic powder in the powder, and the second-stage magnetic rod chamber uses the longitudinal magnetic field and magnetic field gradient difference to accurately capture the residual tiny magnetic powder. The dual-stage synergistic effect effectively avoids the influence of magnetic impurities on the powder quality. At the same time, the powder after being demagnetized by the dual-stage magnetic rod chamber can be further screened by a vibrating screen to remove residual non-magnetic impurities such as clumps and fibers, without the need for additional screening equipment, which simplifies the production process and further ensures the purity of the powder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the assembly of the magnetic rod compartment and the magnetic rod of this utility model; Figure 3 This is a front view of the primary magnetic rod compartment of this utility model; Figure 4 This is a front view of the secondary magnetic rod compartment of this utility model.

[0015] In the diagram, 1 is the conveying auger; 11 is the feeding port; 12 is the discharge port; 2 is the primary magnetic rod bin; 21 is the first magnetic rod assembly; 3 is the secondary magnetic rod bin; 31 is the second magnetic rod assembly; 4 is the vibrating screen; 51 is the magnetic rod fixing frame; 52 is the circular slot; 53 is the flange; and 54 is the elastic connector. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The following is a description of the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.

[0019] Example 1 An apparatus for removing magnetic powder residue from powder includes: a conveying auger 1, a primary magnetic rod bin 2, a secondary magnetic rod bin 3, and a vibrating screen 4; The upper end of the conveying auger 1 is provided with a feeding port 11 for feeding powder to be processed and the lower end is provided with a discharging port 12 for discharging powder. The discharging port 11 is fixedly connected to the feeding end of the primary magnetic rod bin 2, so that the powder conveyed by the conveying auger 1 can directly enter the primary magnetic rod bin 1. The discharge end of the primary magnetic rod bin 2 is fixedly connected to the feed end of the secondary magnetic rod bin 3, and the discharge end of the secondary magnetic rod bin 3 is connected to the feed end of the vibrating screen 4. The first-stage magnetic rod compartment 2 is equipped with a magnetic rod assembly 21, and the installation direction of the magnetic rod assembly 21 is perpendicular to the powder conveying direction of the conveying auger 1. The secondary magnetic rod compartment 3 is equipped with a second set of magnetic rods 31, and the installation direction of the second set of magnetic rods 31 is parallel to the powder conveying direction of the screw conveyor 1.

[0020] like Figures 1-4 As shown, in actual use, this utility model demonstrates: First, the powder to be processed is fed into the conveying auger 1 through the feeding port 11. The variable frequency motor is started to drive the spiral shaft to rotate. The spiral blades push the powder to move downward at a uniform speed along the inner wall of the auger. It is then continuously and evenly fed into the primary magnetic rod bin 2 through the discharge port 12. During this stage, the conveying volume is monitored in real time by the frequency converter to ensure that it does not exceed 100 kg / hour and to avoid the accumulation of powder in the magnetic rod bin. After removing most of the magnetic powder from the powder, the non-magnetic carrageenan powder continues to enter the secondary magnetic rod chamber 3. Next, after the powder enters the primary magnetic rod chamber 2, it slowly falls along the height of the chamber under the action of gravity. When it flows through the transverse magnetic field formed by the magnetic rod group 21, the magnetic powder such as iron filings and magnetic metal particles are attracted to the surface of the magnetic rod by the transverse traction force, thus initially removing the magnetic powder. Next, the powder after primary treatment enters the secondary magnetic rod chamber 3 and flows along the length of the chamber. When it flows through the longitudinal magnetic field formed by the magnetic rod assembly 31, the remaining tiny magnetic powder is captured by the magnetic rods due to the longitudinal adsorption force. The magnetic powder is further removed by the difference between the longitudinal and transverse magnetic field gradients. Finally, the powder after being processed by the secondary magnetic rod bin enters the vibrating screen 4. Under the action of high-frequency vibration, the powder passes through the screen, and the remaining non-magnetic impurities are trapped on the screen. The powder that is screened out is discharged from the discharge port of the vibrating screen, completing the entire magnetic powder removal and impurity removal process.

[0021] As a further preferred embodiment, the first magnetic rod assembly 21 is provided with six layers of magnetic rods, and the number of magnetic rods in the six layers is arranged alternately from bottom to top with three and four rods, and the spacing between adjacent layers of magnetic rods is consistent to ensure that the powder can flow evenly through each layer of magnetic rods. The second magnetic rod assembly 31 is provided with six layers of magnetic rods, and the number of magnetic rods in the six layers is arranged alternately from bottom to top with three and four rods, and the spacing between adjacent layers of magnetic rods is consistent.

[0022] Specifically, three or four sets of magnetic rods are alternately distributed with a uniform interlayer spacing to avoid powder accumulation caused by excessive magnetic rod density or adsorption blind spots caused by uneven spacing, ensuring that each piece of powder can fully contact the magnetic field and the magnetic powder adsorption is more thorough.

[0023] As a further preferred embodiment, both the primary magnetic rod compartment 2 and the secondary magnetic rod compartment 3 are provided with magnetic rod fixing frames 51, and the magnetic rod fixing frames 51 are provided with circular slots 52 that are adapted to the diameter of the magnetic rods.

[0024] Specifically, the magnetic rod holders in the primary and secondary magnetic rod compartments are adapted to the circular slots. The circular slots limit the magnetic rods to prevent them from shifting or shaking during operation, ensuring a uniform and stable distribution of the horizontal and vertical magnetic fields and not affecting the dual-stage demagnetization effect.

[0025] As a further preferred embodiment, a flange 53 is provided at the connection between the primary magnetic rod compartment 2 and the secondary magnetic rod compartment 3, and the two are detachably fixedly connected by the flange 53, with a sealing gasket sandwiched between the flanges 53.

[0026] Specifically, the sealing gasket between flanges 53 can effectively prevent powder leakage at the connection between the two compartments, avoid raw material waste and environmental dust pollution, and ensure the cleanliness of the powder processing process.

[0027] As a further preferred embodiment, an elastic connector 54 is provided between the vibrating screen 4 and the discharge end of the secondary magnetic rod bin 3.

[0028] Specifically, the elastic connector can offset the vibration generated during the operation of the vibrating screen 4, preventing the vibration from being transmitted to the secondary magnetic rod chamber 3, which would cause rigid wear between the chamber and the screen body, thus extending the service life of the components. At the same time, the elastic structure can adapt to the small displacements of the vibrating screen and the chamber body, ensuring the sealing of the connection parts, preventing powder leakage, and not affecting the smooth conveying of powder from the secondary magnetic rod chamber to the vibrating screen.

[0029] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An apparatus for removing magnetic powder residue from powder, characterized in that, include: Conveying auger, primary magnetic rod bin, secondary magnetic rod bin, and vibrating screen; The upper end of the conveying auger is provided with a feeding port for feeding the powder to be processed and the lower end is provided with a discharging port for discharging the powder. The discharging port is fixedly connected to the feeding end of the primary magnetic rod bin, so that the powder conveyed by the conveying auger can directly enter the primary magnetic rod bin. The discharge end of the primary magnetic rod bin is fixedly connected to the feed end of the secondary magnetic rod bin, and the discharge end of the secondary magnetic rod bin is connected to the feed end of the vibrating screen. The first-stage magnetic rod compartment is equipped with a magnetic rod assembly, and the installation direction of the magnetic rod assembly is perpendicular to the powder conveying direction of the conveying auger. The secondary magnetic rod compartment is equipped with a second set of magnetic rods, and the installation direction of the second set of magnetic rods is parallel to the powder conveying direction of the auger.

2. The apparatus for removing magnetic powder residue from powder according to claim 1, characterized in that, The magnetic rod assembly has six layers of magnetic rods. The number of magnetic rods in the six layers is arranged alternately from bottom to top with three and four rods. The spacing between adjacent layers of magnetic rods is consistent to ensure that the powder can flow evenly through each layer of magnetic rods.

3. The apparatus for removing magnetic powder residue from powder according to claim 1, characterized in that, The second magnetic rod assembly has six layers of magnetic rods, with the number of magnetic rods in each layer alternating between three and four from bottom to top, and the spacing between adjacent layers of magnetic rods being consistent.

4. The apparatus for removing magnetic powder residue from powder according to claim 1, characterized in that, Both the primary and secondary magnetic rod compartments are equipped with magnetic rod fixing frames, and the magnetic rod fixing frames are provided with circular slots that are adapted to the diameter of the magnetic rods.

5. The apparatus for removing magnetic powder residue from powder according to claim 1, characterized in that, A flange is provided at the connection between the primary magnetic rod compartment and the secondary magnetic rod compartment, and the two are detachably fixedly connected by the flange. A sealing gasket is sandwiched between the flanges.

6. The apparatus for removing magnetic powder residue from powder according to claim 1, characterized in that, An elastic connector is provided between the vibrating screen and the discharge end of the secondary magnetic rod bin.

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