Blanking system for boehmite powder

Abstract

The utility model relates to a discharging system for boehmite powder, and belongs to the technical field of material conveying equipment. According to the discharging system, the bin of the double-cone structure is adopted, the vibration device and the airflow device are arranged, the anti-sticking coating is sprayed to the inner wall of the bin, and therefore the problem that the discharging effect is poor due to the fact that boehmite particles are small in particle size and high in water absorption, and the viscosity of the boehmite particles is increased after the boehmite particles absorb water is solved.

Description

Technical Field

[0001] The present application relates to the technical field of material conveying equipment, and in particular to a feeding system for boehmite powder. Background Art

[0002] Boehmite, as an important inorganic functional material, has a wide range of applications in multiple industrial fields. However, during the production and processing process, especially during the feeding and unloading stages, boehmite powder is prone to agglomeration and adhesion due to its fine particle size and strong water absorption. Especially when the ambient humidity is high, the material is more likely to adhere to the silo wall, the inner wall of the pipe or the discharge port, causing blockage. In addition, improper silo design, such as insufficient tilt angle or internal structure that promotes material accumulation rather than smooth flow, forming a bridging effect, can also exacerbate the blockage phenomenon. In particular, boehmite has strong water absorption and increases viscosity after water absorption, which is more likely to form a bridging effect, thus increasing its clogging effect. In addition, due to its small particle size, the silo side walls and discharge port are prone to incomplete feeding, which is not conducive to the free flow of materials and can also cause blockage, thereby affecting the uniformity of feeding, seriously affecting production efficiency and product quality.

[0003] Currently, common methods for solving material feeding problems include vibration assistance, airflow, and improving the material contact surface material. However, due to the special properties of boehmite, such as its fine particle size and strong water absorption, these methods are difficult to solve the problem of poor feeding effect. Utility Model Content

[0004] In view of the problems existing in the prior art, one of the purposes of this application is to provide a feeding system for boehmite powder to solve the problem of poor feeding effect caused by the fine particle size and strong water absorption of boehmite in the prior art.

[0005] In order to achieve the above-mentioned object, the present application provides a feeding system for boehmite powder, comprising:

[0006] The silo comprises a lower hopper and a discharge hopper connected to the lower hopper and arranged below the lower hopper, wherein the silo is a double-cone structure in which the lower hopper is wide at the top and narrow at the bottom, and the discharge hopper is narrow at the top and wide at the bottom;

[0007] An airflow device, provided on the side wall of the lower hopper and used for blowing airflow toward the inner wall of the lower hopper;

[0008] At least one vibration device is provided on the outer side wall of the lower hopper and is used to cause the silo to vibrate regularly.

[0009] Furthermore, in some embodiments of the present application, the air flow device comprises an air supply pipe and a plurality of air flow nozzles connected in sequence; the air flow nozzles are arranged on the inner wall of the lower hopper;

[0010] The vibration device includes a vibration motor, an exciter, and a mounting base for mounting the vibration motor. The vibration motor is connected to the exciter; the exciter is drivingly connected to the outer sidewall of the hopper.

[0011] The mounting base is a spring support.

[0012] Further, in some embodiments of the present application, a connection base is further provided between the exciter and the outer sidewall of the hopper, and the connection base is an elastic member.

[0013] The elastic member can be a spring, a spring sheet, or other elastic members that can achieve buffering of the vibration sensation.

[0014] Further, in some embodiments of the present application, a plurality of the air nozzles are annularly and uniformly arranged on the inner wall of the hopper, and the height by which the air nozzles protrude from the inner wall of the hopper does not exceed 100 mm.

[0015] The angle between the air flow ejected by the air nozzle and the inner wall of the hopper is not higher than 90°.

[0016] Further, in some embodiments of the present application, the vertical distance between the vibration device and the upper edge of the discharge hopper does not exceed 1000 mm.

[0017] The minimum linear distance between the vibration device and the adjacent air nozzle is not less than 2000 mm.

[0018] Further, in some embodiments of the present application, a heating device for heating the silo is also provided.

[0019] Further, in some embodiments of the present application, the heating device is a hot air blower, and the hot air blower is connected to the air flow device to supply air flow with a temperature not lower than 50 °C to the air supply pipeline; or

[0020] The heating device is installed on the outer sidewall of the silo and is thermally connected to the silo.

[0021] Further, in some embodiments of the present application, the angle between the inner wall of the hopper and the horizontal plane is 115° - 125°;

[0022] The angle between the inner wall of the discharge hopper and the horizontal plane is not higher than 60°.

[0023] Further, in some embodiments of the present application, the connection between the hopper and the discharge hopper can have a smooth transition or a non-smooth transition.

[0024] Further, in some embodiments of the present application, an anti - sticking coating is further provided on the inner walls of the hopper and the discharge hopper.

[0025] Advantages of the present application:

[0026] (1) The hopper and the discharge hopper of the silo are of a double - cone structure, which can reduce the material accumulation angle and the particle collision and contact during the falling process of the powder in the discharge hopper, improve the falling speed of the powder during the falling process in the discharge hopper, facilitate the free sliding and spreading of the material, reduce the agglomeration of the powder, further reduce the possibility of bridge formation due to powder agglomeration, and reduce the contact between the material and the side wall of the discharge hopper, reduce the adhesion of the powder on the inner surface of the discharge hopper, and reduce the possibility of discharge hopper blockage;

[0027] (2) The air - flow nozzles are evenly distributed in a ring on the inner wall of the hopper, so that the air flow ejected by the air - flow nozzles forms an air - flow layer on the inner wall of the hopper, making the powder hardly contact the inner wall of the hopper during the falling process, reducing the possibility of powder adhesion on the inner wall of the hopper. At the same time, even if a small amount of powder adheres to the inner wall of the hopper, the flowing air - flow layer can also blow off the adhered powder, reducing the possibility of its increased adhesion; reducing material segregation and blockage;

[0028] (3) The feeding system provided in the present application is also provided with a heating device, which can keep the inner wall of the hopper dry and at a high temperature, reduce the moisture in the environment during the material feeding process, and make the material not easily increase its viscosity due to water absorption in the hopper, thereby preventing powder agglomeration and adhesion;

[0029] (4) The frequency of the vibration motor provided in the feeding system of the present application can be adjusted according to the flow properties of the material. For materials with higher viscosity or humidity, increasing the vibration intensity can prevent blockage and ensure the smooth flow of the material; and the vibrator can be rotated by the vibration motor to apply a periodic excitation force to the hopper, causing vibration, thereby preventing the material from adhering to the hopper or blocking at the discharge port, and further promoting the material flow;

[0030] (5) The anti - sticking coating provided in the feeding system of the present application has an extremely low coefficient of friction, reducing the resistance generated when the material contacts its surface, further reducing the possibility of adhesion. Teflon can also withstand high temperatures without decomposition, which enables it to maintain its excellent non - sticking characteristics during the heating process;

[0031] (6) The feeding system for boehmite powder described in the present application can significantly reduce the feeding difficulty of boehmite, increase the production efficiency by at least 30%, reduce the downtime for maintenance caused by material blockage at the same time, and improve the stability and economy of the overall production line. In the long run, the technical solution described in the present application will bring significant cost savings and competitiveness improvement to the enterprise. Description of the Drawings

[0032] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a front view of the structure of a feeding system for boehmite powder provided by some embodiments of the present application.

[0034] Figure 2 It is a structural diagram of a vibration device (102) provided by some embodiments of the present application.

[0035] Figure 3 It is a top view of the structure of a feeding system for boehmite powder provided by some embodiments of the present application.

[0036] Main element symbol description:

[0037] 1 - Silo 1, 100 - Feeding hopper, 200 - Discharge hopper, 101 - Airflow device, 101a - Airflow nozzle, 102 - Vibration device, 102a - Mounting base, 102b - Vibration motor, 102c - Vibrator, 102d - Connecting base, 103 - Anti - sticking coating. Specific embodiments

[0038] The following will clearly and completely describe the technical solutions of the present application in combination with the embodiments. Obviously, the described embodiments are some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] The present application provides a feeding system for boehmite powder, including:

[0040] Silo 1, including a feeding hopper 100 and a discharge hopper 200 connected to the feeding hopper 100 and provided below the feeding hopper 100. The silo 1 has a double - cone structure with the feeding hopper 100 wider at the top and narrower at the bottom, and the discharge hopper 200 narrower at the top and wider at the bottom;

[0041] Airflow device 101, provided on the side wall of the feeding hopper 100 and used to blow air flow onto the inner wall of the feeding hopper (100);

[0042] At least one vibration device 102, provided on the outer side wall of the feeding hopper 100 and used to make the silo 1 vibrate regularly.

[0043] During use, the boehmite powder material enters from the hopper 100 with an upper-wide and lower-narrow conical structure. In the hopper 100, an air flow layer is formed by spraying air through the air nozzles of the air flow device 101 against the inner wall of the hopper 100. The hopper 100 is vibrated by the vibration device 102, and the powder material smoothly reaches the discharge hopper 200 with an upper-narrow and lower-wide conical structure and is smoothly discharged.

[0044] In the above process, the hopper 100 and the discharge hopper 200 of the silo adopt a double-cone structure, which can reduce the material accumulation angle and the particle collision and contact during the falling process of the powder material in the discharge hopper 200, improve the falling speed of the powder material during the falling process in the discharge hopper 200, facilitate the free sliding and spreading of the material, reduce the agglomeration of the powder material, further reduce the possibility of bridge formation due to powder material agglomeration, and reduce the contact between the material and the side wall of the discharge hopper 200, reduce the adhesion of the powder material on the inner surface of the discharge hopper 200, and reduce the possibility of blockage of the discharge hopper 200.

[0045] The air flow device 101 blowing air against the inner wall of the hopper 100 can form an air flow layer, reducing the adhesion of the powder material on the inner wall of the hopper 100, and at the same time, it can also blow off the adhered powder material.

[0046] The vibration of the vibration device 102 further prevents the powder material from adhering to the inner wall of the hopper 100 or blocking at the connection between the hopper 100 and the discharge hopper 200. The feeding hopper and the discharge hopper 200 with a double-cone structure, compared with the traditional feeding hopper and discharge port with a single-cone structure, not only relieve the material accumulation caused by the huge pressure due to the gradually decreasing outlet during the powder material feeding process of the single-cone structure, facilitate the free sliding of the material, but also reduce the contact between the material and the side wall of the discharge hopper 200, thereby reducing the blockage of the discharge hopper 200 and reducing the bridging effect.

[0047] In some embodiments, the air flow device 101 includes a gas supply pipeline and a plurality of air nozzles 103 connected in sequence;

[0048] The air nozzles 103 are arranged on the inner wall of the hopper 100;

[0049] The vibration device 102 includes a vibration motor 102b, an exciter 102c, and a mounting seat 102a for mounting the vibration motor. The vibration motor 102b is connected to the exciter 102c; the exciter 102c is in transmission connection with the outer side wall of the hopper 100;

[0050] The mounting seat 102a is a spring support.

[0051] In this application, the vibrator 102c is a vibration intensifying device. By means of the vibration motor 102b, the vibrator 102c can be driven to rotate, so that the hopper 100 is applied with a periodic excitation force and vibrates, thereby preventing materials from adhering to the hopper 100 or clogging at the connection between the hopper 100 and the discharge hopper 200, and further promoting the flow of materials.

[0052] In some embodiments, a connecting base 102d is further provided between the vibrator 102c and the outer side wall of the hopper 100, and the connecting base 102d is an elastic member.

[0053] The elastic member can be a spring, a spring sheet, or other elastic members capable of buffering the vibration sensation.

[0054] In this application, the setting of the elastic member can buffer a part of the vibration sensation generated by the vibration motor 102b, avoid hard collision between the connecting base 102d and the vibration device 102, and transmit most of the vibration sensation to the hopper 100, so as to promote the acceleration of the feeding speed.

[0055] In some embodiments, a plurality of the air nozzles 103 are annularly and evenly arranged on the inner wall of the hopper 100, and the height by which the air nozzles 103 protrude from the inner wall of the hopper 100 does not exceed 100 mm;

[0056] The included angle between the air flow ejected by the air nozzle 103 and the inner wall of the hopper 100 is not higher than 90°;

[0057] During use, the air pressure of the air nozzle can be 0.5 - 1 MPa. Within this range, the air flow ejected by the air nozzle 103 can preferably blow away the powder adhered to the inner wall of the hopper 100 or the bridged powder; and when the air flow inclines towards the hopper at a certain inclination angle, a relatively stable air flow layer can be formed on the inner wall of the hopper 100, reducing the possibility of the powder adhering to the inner side wall of the hopper 100. In the specific implementation process, the air pressure of the air flow ejected by the air nozzle 103 can be adjusted according to the feeding amount of the powder. If the feeding amount of the powder is large, the air pressure of the ejected air flow can be appropriately increased; if the feeding amount is small, the air pressure of the ejected air flow can be appropriately decreased, but the air pressure should not be too high or too low. Excessive air pressure is likely to cause the powder to disperse, while too low air pressure is difficult to blow the adhered powder away from the hopper.

[0058] In this application, there can be multiple air nozzles 103. Specifically, there can be 2, 3, 4, 5, 6, etc. Each air nozzle 103 is annularly and evenly arranged on the inner wall of the hopper 100 to provide a more uniform air flow distribution and reduce material segregation and blockage.

[0059] When the height of the air flow nozzle 103 protruding from the inner wall of the blanking hopper 100 is greater than 100 mm, it is not conducive to the formation of the air flow layer on the inner wall of the blanking hopper 100.

[0060] When the angle between the air flow ejected by the air flow nozzle 103 and the inner wall of the blanking hopper 100 is not higher than 90°, it is more conducive to forming a stable air flow layer on the inner wall of the blanking hopper 100, thereby reducing material adhesion.

[0061] In some embodiments, the vertical distance between the vibration device 102 and the upper edge of the discharge hopper 200 is not higher than 1000 mm;

[0062] The minimum linear distance between the vibration device 102 and the adjacent air flow nozzle 103 is not less than 2000 mm.

[0063] Due to the tapered structure of the blanking hopper 100 with a wider upper part and a narrower lower part, powder is more likely to form blockages and bridging in the lower part of the blanking hopper 100, especially at the connection between the blanking hopper 100 and the discharge hopper 200. Therefore, it is preferably to set the vibration device 102 at a position close to the lower part of the blanking hopper 100, which is more conducive to relieving blockages and destroying bridging; however, setting the vibration device 102 at the connection between the blanking hopper 100 and the discharge hopper 200 or too close to this connection, unexpectedly, is not conducive to maintaining smooth blanking. This may be because the powder contacts gradually become closer due to the gradually shrinking space near the connection between the blanking hopper 100 and the discharge hopper 200. During this process, if strong vibration is provided, it may increase the extrusion between the powders, and further may exacerbate powder agglomeration, resulting in an increased probability of blockage. Therefore, in the present application, the vertical distance between the vibration device 102 and the upper edge of the discharge hopper 200 is preferably not less than 200 mm and not higher than 1000 mm, so as to reduce the extrusion between the powders while providing periodic vibration for the blanking hopper 100 to reduce blockages and adhesion, and thereby ensure the smooth blanking of the powder.

[0064] In some embodiments, a heating device for heating the silo 1 is also provided.

[0065] In the present application, the heating device may be a heating device well-known to those skilled in the art, such as heating sheets, heating wires, heating tubes, etc., and is not limited in the present application.

[0066] In some other embodiments, the heating device is a hot air blower, and the hot air blower is connected to the air flow device 101 for providing an air flow with a temperature not lower than 50 °C to the air supply pipeline.

[0067] In some other embodiments, the heating device is installed on the outer side wall of the silo 1 and is thermally connected to the silo 1.

[0068] In this application, the heating device is a hot air blower that provides hot air flow to the air flow device 101. The hot air blower heats and dries the air to an appropriate temperature and humidity and supplies it to the air flow device 101, so that the gas blown out by the air flow nozzle is dry hot air with a temperature not lower than 50°C.

[0069] The inner wall of the hopper (100) can be evenly heated to a temperature not lower than 40°C.

[0070] The air flow is heated by the heating device so that the gas blown out is dry hot air with a temperature not lower than 50°C, thereby keeping the inner wall of the hopper 100 dry and at a high temperature, and preventing the material from easily absorbing moisture and adhering in the hopper 100, thus further improving the problem of material adhesion.

[0071] When the heating device is installed on the outer side wall of the silo 1, it is thermally connected to the silo 1, so that the inner wall of the silo 1 is evenly heated to 40 - 70°C, further keeping the inner wall of the silo 1 dry and at a high temperature, reducing the moisture in the environment during the material discharging process, and reducing the possibility of material adhesion.

[0072] In some embodiments, the angle between the inner wall of the hopper 100 and the horizontal plane is 115 - 125°;

[0073] The angle between the inner wall of the discharge hopper 200 and the horizontal plane is not higher than 60°.

[0074] In this application, when the angle between the inner wall of the hopper 100 and the horizontal plane is controlled within the range of 115 - 125°, and the angle between the inner wall of the discharge hopper 200 and the horizontal plane is not higher than 60°, it is more conducive to the inertial sliding of the material.

[0075] In some embodiments, the connection between the hopper 100 and the discharge hopper 200 can have a smooth transition or not.

[0076] In this application, it is preferred that the connection between the hopper 100 and the discharge hopper 200 does not have a smooth transition, so as to reduce the material accumulation angle, facilitate the free sliding of the material, and reduce the contact between the material and the side wall of the discharge port, reducing the blockage of the discharge port.

[0077] In some embodiments, a layer of anti - sticking coating is further provided on the inner walls of the hopper 100 and the discharge hopper 200.

[0078] In this application, the anti-sticking coating selects Teflon with an extremely low coefficient of friction (0.05 to 0.1). The carbon-fluorine bond in the molecular structure of Teflon is very stable, with an extremely low surface energy. Almost no substance can strongly adhere to it. Even a very thin layer of Teflon coating can effectively prevent most substances from adhering to its surface. The coefficient of friction of the Teflon coating is extremely low, which reduces the resistance generated when the material contacts its surface and further reduces the possibility of adhesion. In addition, Teflon can withstand high temperatures without decomposition, which enables it to maintain its non-sticking property during the heating process.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A feeding system for boehmite powder, characterized in that, Comprising: A silo (1), including a blanking hopper (100) and a discharge hopper (200) connected to the blanking hopper (100) and disposed below the blanking hopper (100), the silo (1) being a double-cone structure with the blanking hopper (100) wider at the top and narrower at the bottom and the discharge hopper (200) narrower at the top and wider at the bottom; An air flow device (101), disposed on the side wall of the blanking hopper (100) and used to blow air flow onto the inner wall of the blanking hopper (100); At least one vibration device (102), disposed on the outer side wall of the blanking hopper (100) and used to make the silo (1) vibrate regularly.

2. The blanking system according to claim 1, wherein The air flow device (101) includes a supply air pipe and a plurality of air flow nozzles connected in sequence; the air flow nozzles are disposed on the inner wall of the blanking hopper (100); The vibration device (102) includes a vibration motor (102b), an exciter (102c), and a mounting seat (102a) for mounting the vibration motor, the vibration motor (102b) being connected to the exciter (102c); the exciter (102c) is in transmission connection with the outer side wall of the blanking hopper (100); The mounting seat (102a) is a spring support.

3. The blanking system according to claim 2, wherein A connecting base (102d) is further disposed between the exciter (102c) and the outer side wall of the blanking hopper (100), and the connecting base (102d) is an elastic member.

4. The blanking system according to claim 2, characterized in that, A plurality of the air flow nozzles are annularly and evenly disposed on the inner wall of the blanking hopper (100), and the height by which the air flow nozzles protrude from the inner wall of the blanking hopper (100) does not exceed 100 mm; The angle between the air flow ejected by the air flow nozzles and the inner wall of the blanking hopper (100) is not higher than 90°.

5. The blanking system according to claim 2, wherein The vertical distance between the vibration device (102) and the upper edge of the discharge hopper (200) is not higher than 1000 mm; The minimum linear distance between the vibration device (102) and the adjacent air flow nozzles is not less than 2000 mm.

6. The blanking system according to claim 2, characterized in that, A heating device for heating the silo (1) is further provided.

7. The blanking system according to claim 6, characterized in that, The heating device is a hot air blower, and the hot air blower is connected to the air flow device (101) and used to supply air flow with a temperature not lower than 50 °C to the supply air pipe; or The heating device is installed on the outer side wall of the silo (1) and is in heat conduction connection with the silo (1).

8. The blanking system according to claim 1, wherein The angle between the inner wall of the blanking hopper (100) and the horizontal plane is 115 - 125°; The angle between the inner wall of the discharge hopper (200) and the horizontal plane is not higher than 60°.

9. The blanking system according to claim 1, wherein, The connection between the blanking hopper (100) and the discharge hopper (200) is not smoothly transitioned.

10. The blanking system according to claim 1, characterized in that, A layer of anti-adhesion coating is further provided on the inner walls of the blanking hopper (100) and the discharge hopper (200).

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