A device for high-temperature acid mist synergistic ultrasonic strengthening purification of quartz sand

Abstract

The utility model discloses a high temperature acid mist synergic ultrasonic wave reinforced purification quartz sand's device relates to quartz sand purification technical field, the utility model discloses a reaction kettle, motor and grid cylinder, the reaction kettle inside is provided with the grid cylinder, the grid cylinder upper end is provided with the material pipe, the reaction kettle outer wall is sleeved with the support frame, the support frame upper end is provided with the transfer pump, the grid cylinder upper end outside is sleeved with the annular pipe that is annular and intercommunication, the transfer pump output is provided with the conveying pipe, both ends of grid cylinder are provided with the pivot, the reaction kettle one end is provided with the motor that output is connected with the pivot, the grid cylinder outer wall is provided with the ultrasonic transducer, the reaction kettle one end is provided with the current generator, the annular pipe inner wall is provided with the atomizing nozzle that is equidistant distribution, the utility model discloses setting the ultrasonic transducer, peeling the impurity layer that dissolves on the surface of quartz sand, reduces the consumption of hydrofluoric acid, makes acid mist even cover every particle.

Description

Technical Field

[0001] This utility model relates to the field of quartz sand purification technology, and in particular to a device for high-temperature acid mist synergistic ultrasonic enhancement purification of quartz sand. Background Technology

[0002] High-temperature acid mist corrosion is the core method for the chemical purification of quartz sand. The high temperature of 80-120℃ increases the molecular motion rate of acids such as hydrofluoric acid and hydrochloric acid by 30%-50%. The acid mist particle size is 5-20μm, which can quickly penetrate into the pores and cracks of quartz sand particles, accelerating the dissolution reaction of impurities such as feldspar and iron oxides. Hydrofluoric acid reacts with feldspar to form soluble silica fluorides. The high temperature causes the crystal lattice of impurity minerals to expand and the bond energy to decrease. For example, the crystal lattice stability of feldspar decreases significantly above 90℃, and the reaction rate with acid mist is 2-3 times higher than at room temperature. The atomized acid mist can uniformly coat the quartz sand particles, avoiding the problem of uneven reaction caused by a sudden drop in local acid concentration in traditional immersion acid leaching.

[0003] This process occurs after physical pretreatment and before deep purification in the quartz sand preparation process. After physical pretreatment such as crushing, sieving, and magnetic separation to remove large particles and ferromagnetic substances, 50-200 mesh quartz sand enters the reaction chamber. After high-temperature acid mist corrosion, the quartz sand needs to be washed with water until neutral, and then undergoes supercritical extraction to remove trace amounts of boron and phosphorus impurities for deep purification. Finally, it is dried to obtain a high-purity product. However, the high-temperature acid mist corrosion process has the following problems: acid mist shadow zones easily form where quartz sand particles accumulate; local impurities are not fully dissolved; the impurity layer dissolved on the quartz sand surface, such as silica gel, cannot be physically peeled off; and the silica gel and other products generated by the reaction form a dense film on the quartz sand surface, hindering the contact between fresh acid mist and unreacted impurities, requiring frequent acid replacement to maintain efficiency. Therefore, those skilled in the art have provided a device for high-temperature acid mist combined with ultrasonic-enhanced purification of quartz sand to solve the problems mentioned in the background art. Utility Model Content

[0004] Technical solution

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a device for high-temperature acid mist synergistic ultrasonic enhancement and purification of quartz sand, comprising a reaction vessel, a motor, and a grid cylinder. The reaction vessel contains a grid cylinder, with a feed pipe at its upper end. A support frame is fitted around the outer wall of the reaction vessel, and a delivery pump is mounted on the upper end of the support frame. A ring-shaped, interconnected annular tube is fitted around the upper outer end of the grid cylinder. A delivery pipe penetrating the annular tube is located at the output end of the delivery pump. Rotary shafts, rotatably mounted inside the reaction vessel, are located at both ends of the grid cylinder. A motor, with its output end connected to the rotating shaft, is located at one end of the reaction vessel. An ultrasonic transducer arranged in a ring array is located on the outer wall of the grid cylinder. A current generator is located at one end of the reaction vessel. Equally spaced atomizing nozzles are located on the inner wall of the annular tube.

[0006] Furthermore, a conductive ring is sleeved on the outside of the rotating shaft, and a hollow support tube is provided between the conductive ring and the reaction vessel. The current generator is electrically connected to the conductive ring. Specifically, the conductive ring does not participate in the rotation of the shaft. It is connected to the wire arrangement through the support tube, and the conductive ring is fixed on the outside of the shaft.

[0007] Furthermore, a collar is sleeved on the outer wall of the rotating shaft, and one end of the collar is provided with a brush that is attached to one side of the outer wall of the conductive ring and electrically connected to the ultrasonic transducer. Specifically, the collar rotates with the shaft and is attached to the outer wall of the conductive ring through the brush, so that an effective power supply is maintained when the ultrasonic transducer rotates.

[0008] Furthermore, the upper end of the material tube is provided with a flared opening whose radius gradually decreases from top to bottom, and a control valve is provided inside the material tube; Specifically, the size of the opening of the flared lifting pipe when receiving quartz sand particles is controlled by a control valve.

[0009] Furthermore, the front end of the reaction tank is provided with an addition port controlled by a valve, and the upper end of the reaction tank is provided with a feed hopper whose radius gradually decreases from top to bottom; Specifically, the inlet is used to add acidic solutions, and the conveyed quartz sand is guided into the feed pipe through the feed hopper.

[0010] Furthermore, the reaction vessel is provided with a top cover at the upper end, a viewing window at the front end, and a discharge trough controlled by a valve at the lower end. The inner wall of the lower end of the reaction vessel is funnel-shaped and inclined towards the discharge trough. Specifically, the top cover controls the opening and closing of the upper part of the reaction vessel, and the internal condition of the reaction vessel can be observed through the viewing window. The discharge trough outputs the quartz sand discharged from the grid cylinder, and the funnel-shaped inner wall facilitates the flow of quartz sand. Beneficial effects

[0011] Compared with existing technologies, the advantages of this utility model are: In this invention, a hopper delivers quartz sand through a feed pipe into the inside of a grid cylinder. A pump delivers hydrofluoric acid into an annular pipe, and acid mist is sprayed through atomizing nozzles on the inner wall of the annular pipe. This acid mist acts on the quartz sand through the grid cylinder. At the same time, when the motor drives the rotating shaft to rotate, it causes the grid cylinder to rotate, and the quartz sand flows inside the grid cylinder, preventing the quartz sand from accumulating and improving the contact effect with the acid mist, thereby improving the reaction effect. While purifying quartz sand with high-temperature acid mist, an ultrasonic transducer on the outer wall of the grid cylinder generates high-frequency vibrations at 20-40kHz, causing a large number of microbubbles to form in the acid mist. When the bubbles collapse, the released microjet can wash away the impurity layer on the surface of the quartz sand, breaking down the mass transfer barrier. The vibration causes the quartz sand particles to flow and tumble, avoiding accumulation and ensuring that the acid mist evenly covers each particle. The deviation in impurity removal rate is reduced. The high-frequency vibration makes it easier for the acid mist to enter the particle pores, improving the removal efficiency of encapsulated impurities. The impurity removal rate is improved, the acid mist utilization rate is improved, and thus the consumption of hydrofluoric acid is reduced.

[0012] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a front-view three-dimensional structural diagram of the present invention; Figure 2 This is a top-view three-dimensional structural diagram of the guide bucket of this utility model; Figure 3 This is a schematic diagram of the main sectional three-dimensional structure of this utility model; Figure 4 This is a front-view three-dimensional structural diagram of the grid tube of this utility model; Figure 5 This is a top-view three-dimensional structural diagram of the ultrasonic transducer of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Top cover; 2. Reaction vessel; 3. Current generator; 4. Transfer pump; 5. Support frame; 6. Feed pipe; 7. Motor; 8. Viewing window; 9. Addition port; 10. Discharge trough; 11. Grid cylinder; 12. Conveying pipe; 13. Feed hopper; 14. Annular pipe; 15. Atomizing nozzle; 16. Trumpet mouth; 17. Control valve; 18. Rotating shaft; 19. Support pipe; 20. Brush; 21. Conductive ring; 22. Collar; 23. Ultrasonic transducer. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0020] Example

[0021] Please see Figure 1-5 As shown, this embodiment is a device for high-temperature acid mist synergistic ultrasonic enhancement purification of quartz sand, including a reaction tank 2, a motor 7 and a grid cylinder 11. The grid cylinder 11 is installed inside the reaction tank 2. A material pipe 6 is installed at the upper end of the grid cylinder 11. A support frame 5 is sleeved on the outer wall of the reaction tank 2. A delivery pump 4 is installed at the upper end of the support frame 5. An annular tube 14 that is circular and interconnected is sleeved on the outer side of the upper end of the grid cylinder 11. A delivery pipe 12 that passes through the annular tube 14 is installed at the output end of the delivery pump 4. A rotating shaft 18 that is rotatably installed inside the reaction tank 2 is installed at both ends of the grid cylinder 11. A motor 7 whose output end is connected to the rotating shaft 18 is installed at one end of the reaction tank 2. An ultrasonic transducer 23 that is arranged in an annular array is installed on the outer wall of the grid cylinder 11. A current generator 3 is installed at one end of the reaction tank 2. An atomizing nozzle 15 that is evenly distributed is installed on the inner wall of the annular tube 14. A conductive ring 21 is sleeved on the outside of the rotating shaft 18. A hollow support tube 19 is provided between the conductive ring 21 and the reaction vessel 2. The current generator 3 is electrically connected to the conductive ring 21. A collar 22 is sleeved on the outer wall of the rotating shaft 18. One end of the collar 22 is provided with a brush 20 that is attached to one side of the outer wall of the conductive ring 21 and electrically connected to the ultrasonic transducer 23. The upper end of the material pipe 6 is provided with a bell mouth 16 whose radius gradually decreases from top to bottom, and a control valve 17 is provided inside the material pipe 6; The front end of the reaction tank 2 is equipped with an addition port 9 controlled by a valve, and the upper end of the reaction tank 2 is equipped with a feed hopper 13 with a radius that gradually decreases from top to bottom; The upper end of the reaction vessel 2 is provided with a top cover 1, the front end of the reaction vessel 2 is provided with a viewing window 8, the lower end of the reaction vessel 2 is provided with a discharge trough 10 controlled by a valve to open and close, and the inner wall of the lower end of the reaction vessel 2 is funnel-shaped and inclined towards the discharge trough 10. In this embodiment, the grid cylinder 11 adopts a hollow grid design with a hole diameter of 3mm. This allows acid mist to penetrate and contact the internal quartz sand, and also drives the particles to turn over during rotation, avoiding local accumulation and the formation of acid mist shadow areas. The two ends of the rotating shaft 18 are connected to the reaction vessel 2 through bearing seats to ensure that the radial runout of the grid cylinder 11 is small when it rotates. Compared with a fixed container, the rotating grid cylinder 11 increases the contact area between the quartz sand and the acid mist, resulting in a smaller deviation in the impurity removal rate. The grid structure reduces particle retention. The grid cylinder 11 is made of Hastelloy C-276, which is resistant to hydrofluoric acid corrosion. The rotating shaft 18 is made of 316L stainless steel with a chrome-plated surface, which improves wear resistance. Combined with ceramic bearings, the service life is extended. Ultrasonic transducers 23, each with a power of 50W, are arranged in a ring array on the outer wall of the grid cylinder 11. Powered by a current generator 3, they generate high-frequency vibrations. A conductive ring 21 and a brush 20 form a sliding electrical contact system, ensuring continuous operation of the transducers as the grid cylinder 11 rotates. The vibration amplitude remains stable at 10-50μm. The distributed arrangement of the transducers ensures uniform energy transfer to the quartz sand particles, covering all cavitation effects without dead zones, thus improving silica gel stripping efficiency. The cooperation between the conductive ring 21 and the brush 20 avoids cable entanglement problems, supporting the grid cylinder 11 in... The ultrasonic transducer 23 is made of titanium alloy, which has an acoustic impedance close to that of quartz sand and high acoustic energy transmission efficiency. It can effectively transmit high-frequency vibrations to particles. At the same time, titanium alloy has excellent resistance to hydrofluoric acid corrosion. In acid mist environment of 80-120℃, the surface corrosion resistance is significant, ensuring long-term stable operation. The power transmission adopts a combination of copper conductive ring 21, gold-plated surface and silver graphite brush 20. The contact resistance is ≤0.1Ω. At the rotation speed of grid cylinder 11 of 5-10r / min, the conductivity loss is small and can stably power the transducer. An annular tube 14 surrounds the upper outer side of the grid cylinder 11, with a diameter slightly larger than the grid cylinder 11. A mixture of 5-10% hydrofluoric acid and 10-15% hydrochloric acid is pressurized by a delivery pump 4 at a pressure of 0.3-0.5 MPa and delivered into the tube. The mixture is then converted into 5-20 μm acid mist through a 0.5 mm atomizing nozzle 15 and sprayed evenly in an annular pattern onto the surface of the grid cylinder 11. The annular arrangement of the nozzles allows the acid mist to cover an angle of 360°. The rotational cooperation with the grid cylinder 11 improves the utilization rate of acid mist and reduces hydrofluoric acid consumption. The detachable nozzle design facilitates cleaning and reduces maintenance time. The annular tube 14 is made of PPH material, which is resistant to acid and alkali corrosion and lightweight. The atomizing nozzle 15 is made of ceramic material, which has excellent wear resistance and ensures the uniformity of acid mist. The inner wall of reaction vessel 2 is lined with polytetrafluoroethylene, which is resistant to high temperature and acid mist corrosion. The top cover 1 is equipped with a silicone sealing ring. The viewing window 8 is made of borosilicate glass, which allows real-time observation of the reaction status. The discharge trough 10 is tilted at an angle of 30° to ensure complete discharge of quartz sand. The horn-shaped design 16 of the feed hopper 13 with a cone angle of 60° ensures smooth and unobstructed feeding of quartz sand. The control valve 17 is a pneumatic ball valve with a fast response time. The feed rate can be adjusted through PLC linkage to adapt to different processing needs. The outer shell of reaction vessel 2 is made of Q235 steel. This device achieves efficient purification through a synergistic mechanism of uniform acid mist spraying, dynamic particle agitation, and ultrasonic-enhanced exfoliation. Physically pretreated 50-200 mesh quartz sand enters the feed pipe 6 through the feed hopper 13. After the flow rate is regulated by the control valve 17, it falls into the rotating grid cylinder 11. The motor 7 drives the rotating shaft 18 at a speed of 5-10 r / min. Simultaneously, the delivery pump 4 pressurizes and delivers the acid solution to the annular pipe 14, where it is atomized into 5-20 μm acid mist through the atomizing nozzle 15 and sprayed annularly onto the surface of the grid cylinder 11. The acid mist penetrates the grid and fully contacts the internal quartz sand. The reaction tank 2 maintains a high temperature of 80-120℃, which enhances the activity of the acid mist and accelerates the dissolution of impurities such as feldspar and iron oxides. Feldspar reacts with hydrofluoric acid to form soluble silica fluorides. During the process, the current generator 3 supplies power to the ultrasonic transducer 23 on the outer wall of the grid cylinder 11 through the conductive ring 21 and the brush 20. The high-frequency vibration is transmitted to the quartz sand particles. On the one hand, the micro-jet generated by the cavitation effect washes away the silica gel impurity layer on the surface and breaks down the mass transfer barrier. On the other hand, the vibration and the rotation of the grid cylinder 11 work together to make the particles flow and turn over, avoiding accumulation and ensuring uniform coverage of acid mist. After the reaction is completed, the quartz sand rotates to the bottom with the grid cylinder 11 and falls into the lower end of the reaction tank 2 through the grid gap. It is then guided through the funnel-shaped inner wall to the discharge tank 10 and discharged to the subsequent water washing process. The entire process is controlled by PLC linkage to control the feed rate, acid mist concentration, temperature and vibration parameters, achieving a highly efficient purification effect with efficient impurity removal and improved acid mist utilization.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for high-temperature acid mist synergistic ultrasonic enhancement and purification of quartz sand, characterized in that: The system includes a reaction vessel (2), a motor (7), and a grid cylinder (11). The reaction vessel (2) is equipped with a grid cylinder (11), and a feed pipe (6) is installed at the upper end of the grid cylinder (11). A support frame (5) is fitted onto the outer wall of the reaction vessel (2), and a delivery pump (4) is installed at the upper end of the support frame (5). An annular pipe (14) that is circular and interconnected is fitted onto the outer side of the upper end of the grid cylinder (11), and the output end of the delivery pump (4) is provided with a through-hole annular pipe (14). The conveying pipe (12) has a rotating shaft (18) at both ends of the grid cylinder (11) that is rotatably installed inside the reaction vessel (2). The reaction vessel (2) has a motor (7) at one end whose output end is connected to the rotating shaft (18). The outer wall of the grid cylinder (11) is provided with ultrasonic transducers (23) arranged in a ring array. The reaction vessel (2) has a current generator (3) at one end. The inner wall of the ring pipe (14) is provided with atomizing nozzles (15) that are evenly distributed.

2. The apparatus for high-temperature acid mist synergistic ultrasonic enhancement and purification of quartz sand according to claim 1, characterized in that: A conductive ring (21) is sleeved on the outside of the rotating shaft (18). A hollow support tube (19) is provided between the conductive ring (21) and the reaction vessel (2). The current generator (3) is electrically connected to the conductive ring (21).

3. The apparatus for high-temperature acid mist synergistic ultrasonic enhancement and purification of quartz sand according to claim 1, characterized in that: The outer wall of the rotating shaft (18) is fitted with a collar (22), and one end of the collar (22) is provided with a brush (20) that is attached to one side of the outer wall of the conductive ring (21) and electrically connected to the ultrasonic transducer (23).

4. The apparatus for high-temperature acid mist synergistic ultrasonic enhancement purification of quartz sand according to claim 1, characterized in that: The upper end of the material tube (6) is provided with a bell mouth (16) whose radius gradually decreases from top to bottom, and a control valve (17) is provided inside the material tube (6).

5. The apparatus for high-temperature acid mist synergistic ultrasonic enhancement purification of quartz sand according to claim 1, characterized in that: The reaction vessel (2) is provided with an addition port (9) controlled by a valve at the front end, and a feed hopper (13) with a gradually decreasing radius from top to bottom is provided at the upper end of the reaction vessel (2).

6. The apparatus for high-temperature acid mist synergistic ultrasonic-enhanced purification of quartz sand according to claim 1, characterized in that: The reaction vessel (2) is provided with a top cover (1) at the upper end, a viewing window (8) at the front end of the reaction vessel (2), and a discharge trough (10) controlled by a valve at the lower end of the reaction vessel (2). The inner wall of the lower end of the reaction vessel (2) is funnel-shaped and inclined towards the discharge trough (10).

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