Washing device for high-purity quartz sand

Abstract

The utility model relates to a washing device, in particular to a washing device for high-purity quartz sand. The washing device comprises a square frame support, a washing tower column-shaped main body is arranged on the square frame support, a filter tank is arranged below the washing tower column-shaped main body, and a filter assembly is arranged between the filter tank and the washing tower column-shaped main body; a water inlet is formed in the bottom of the filter tank; the filter assembly is composed of an upper connecting flange, a transition flange, a double-layer filter screen plate and a lower connecting flange, and at least one layer of filter screen is arranged between the filter screen plates; and side water inlets are uniformly distributed on the transition flange. According to the washing device, the blocking capacity is improved, the quartz sand can be effectively intercepted, quartz sand loss is avoided, loss is reduced, and the production cost is reduced. The water washing device can be used for back flushing and side flushing, and can keep the continuous filtering capacity of the filter screen and the filter screen plate, so that the water washing device is not easy to block, and the water washing efficiency is effectively improved. The problem that an existing device is low in washing efficiency due to the fact that quartz sand is prone to loss or blockage is solved.

Description

Technical Field

[0001] This utility model relates to a water washing device, specifically a water washing device for high-purity quartz sand. Background Technology

[0002] High-purity silica sand is a type of silica sand with extremely high SiO2 content and extremely low impurity content. Its purity is usually above 99.99%, and some special applications even require it to reach above 99.999%. The content of key impurity elements such as Fe, Al, and alkali metals must be controlled at extremely low levels.

[0003] Due to its unique physical and chemical properties, high-purity quartz sand is widely used in many high-tech fields. In optics, its excellent light transmittance and thermal stability make it an important material for manufacturing optical instruments such as lenses and prisms. In electronics, high-purity quartz sand is used to manufacture transistors and capacitors, meeting the high requirements of integrated circuit manufacturing. Furthermore, high-purity quartz sand is also used to manufacture special refractory materials, etching-resistant materials, and chemical equipment, providing key raw materials for the materials and chemical industries.

[0004] Acid washing and water washing are among the key impurity removal processes for high-purity quartz sand. Patent application CN218340490U discloses a high-purity quartz sand purification and acid washing device, which includes a bottom support, an upright plate on the upper surface of the bottom support, and an assembly frame hinged to the upper end of the upright plate. The assembly frame contains a mixing drum. By setting up the mixing drum, after the assembly frame and the mixing drum are rotated counterclockwise to a vertical position, quartz sand and acid are injected into the mixing drum successively through a right-side extension pipe. Then, the assembly frame and the mixing drum are rotated clockwise to a horizontal position, causing the motor shaft of the drive motor to drive the drive gear to rotate, which in turn drives the mixing drum to rotate, continuously agitating the quartz sand inside the mixing drum, ensuring full contact between the quartz sand and the acid, thus improving the acid washing effect. After acid washing, the acid is discharged from the mixing drum, and water is injected into the mixing drum. Rotating the mixing drum again allows the quartz sand to fully contact with the water, thus performing water washing and improving the water washing effect of the quartz sand.

[0005] The aforementioned device can perform acid washing and water washing of quartz sand. However, during the acid washing process, the removal of impurities attached to the quartz sand reduces its particle size, making it easier for the sand to pass through the filter screen and resulting in quartz sand loss. While reducing the filter screen aperture can enhance its retention capacity and reduce quartz sand loss, continuous water washing can easily lead to filter screen clogging, thus reducing washing efficiency. Therefore, it is necessary to redesign a high-purity quartz sand washing device to solve these problems. Summary of the Invention

[0006] The purpose of this invention is to provide a washing device for high-purity quartz sand that can effectively reduce quartz sand loss, minimize clogging, and improve washing efficiency.

[0007] The technical solution of this utility model is:

[0008] A high-purity quartz sand washing device comprises a square frame support, a columnar body of a washing tower, a filter tank, and a filter assembly. Its features include: the columnar body of the washing tower is mounted on the square frame support; a filter tank is positioned below the columnar body; and a filter assembly is positioned between the filter tank and the columnar body. An inlet is located at the bottom of the filter tank. The filter assembly consists of an upper connecting flange, a transition flange, a double-layer filter screen, and a lower connecting flange arranged sequentially from top to bottom, with at least one layer of filter screen between the filter screens. Side inlets are evenly distributed on the transition flange. The upper connecting flange is welded to the columnar body of the washing tower, and the lower connecting flange is welded to the filter tank.

[0009] The bottom of the columnar body of the water washing tower is connected to a material pump, and the top of the columnar body of the water washing tower is provided with an overflow cylinder with an overflow drain outlet; the top of the overflow cylinder is provided with a cover.

[0010] Preferably, the pump is a diaphragm pump.

[0011] A vacuum filtration mechanism is provided on the filter tank on the inlet side.

[0012] Preferably, the vacuum filtration mechanism includes a waste liquid transfer vacuum storage tank and a vacuum pump. One end of the waste liquid transfer vacuum storage tank is connected to the vacuum pump through a connecting pipe, and the other end of the waste liquid transfer vacuum storage tank is connected to the filter tank through a connecting pipe.

[0013] The beneficial effects of this utility model are as follows:

[0014] This high-purity quartz sand washing device enhances the barrier capacity of the filter screen by increasing its mesh size, effectively improving quartz sand interception, preventing loss, reducing production costs, and ensuring filter screen stability. The filter screen is secured by clamping the screen, providing sufficient support to prevent breakage and maintain filtration capacity. The inlet allows for reverse rinsing of the filter screen and filter plate, while the side inlet allows for lateral rinsing, maintaining continuous filtration and preventing clogging during continuous washing, thus significantly improving washing efficiency. This device solves the problem of low washing efficiency caused by easy quartz sand loss or clogging in existing devices. Attached Figure Description

[0015] Figure 1 This is an isometric schematic diagram of the present invention;

[0016] Figure 2This is a front view schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the filter assembly of this utility model.

[0018] In the diagram: 1. Square frame support, 2. Columnar body of the water washing tower, 3. Filter tank, 4. Water inlet, 5. Upper connecting flange, 6. Transition flange, 7. Filter screen, 8. Lower connecting flange, 9. Filter screen, 10. Side water inlet, 11. Pump, 12. Overflow cylinder, 13. Overflow drain, 14. Top cover, 15. Waste liquid transfer vacuum storage tank, 16. Vacuum pump. Detailed Implementation

[0019] This high-purity quartz sand washing device consists of a square frame support 1, a columnar washing tower body 2, a filter tank 3, and a filter assembly. The columnar washing tower body 2 is mounted on the square frame support 1 to hold and fix the quartz sand, which is then acid-washed and water-washed within it. To ensure sufficient contact between the sand and water / gas, and to suspend it within the columnar structure, the ratio of the length to the inner diameter of the columnar washing tower body 2 is between 3 and 6. A filter tank 3 is located below the columnar washing tower body 2, and a filter assembly is installed between the filter tank 3 and the columnar washing tower body 2. This assembly allows acid to pass through while intercepting the quartz sand, thus removing the acid. A water inlet 4 is located at the bottom of the filter tank 3, allowing water to enter and backwash the filter assembly. This maintains the filtration capacity of the filter assembly, preventing clogging during continuous operation and preserving filtration efficiency, thereby maintaining overall filtration production efficiency. The function of filter tank 3 is to buffer acid and water, thereby facilitating the removal of acid and allowing water to pass through the filter components into the columnar body 2 of the water washing tower.

[0020] The filter assembly consists of an upper connecting flange 5, a transition flange 6, a double-layer filter screen 7, and a lower connecting flange 8 arranged sequentially from top to bottom. At least one layer of filter screen 9 is placed between the filter screens 7. During installation, to prevent filter screen 9 from deforming and causing filtration failure, one or more layers of filter screen 9 are sandwiched between the two layers of porous PTFE filter screens 7. The cooperation between the filter screen 9 and the filter screen 7 effectively intercepts quartz sand, preventing quartz sand loss and thus effectively reducing production costs. The transition flange 6 has evenly distributed side inlets 10, allowing water to enter from the bottom side of the columnar body 1 of the washing tower, thus flushing the filter assembly from the side and further preventing quartz sand from clogging the filter assembly. Simultaneously, the side and reverse impacts suspend the quartz sand, ensuring the cleaning and dilution of the acid solution, thereby guaranteeing the washing effect. The upper connecting flange 5 is welded to the columnar body 2 of the washing tower, and the lower connecting flange 8 is welded to the filter tank 3.

[0021] A material pump 11 is connected to the bottom of the columnar body 2 of the washing tower to extract the washed quartz sand and transport it to the next process. Preferably, the material pump 11 is a diaphragm pump. To extend the service life of the material pump and reduce contamination during the extraction process, the pump diaphragm is made of PTFE or other wear-resistant material, and the pump housing is made of clean PP material. An overflow cylinder 12 is provided at the top of the columnar body 2 of the washing tower, and an overflow drain outlet 13 is provided on the overflow cylinder 12; a top cover 14 is provided at the top of the overflow cylinder 12. The top cover 14 is an openable flip-top structure, and a handle is provided at the top of the top cover 14. The top cover 14 is fixed above the overflow cylinder 12, and the diameter of the overflow cylinder 12 is slightly larger than that of the columnar body 2 of the washing tower. Preferably, the diameter of the overflow cylinder 12 is about 100mm.

[0022] A vacuum filtration mechanism is installed on the filter tank 3 on one side of the inlet 4 to extract the acid solution, thereby reducing the difficulty of water washing. Preferably, the vacuum filtration mechanism includes a waste liquid transfer vacuum storage tank 15 and a vacuum pump 16. One end of the waste liquid transfer vacuum storage tank 15 is connected to the vacuum pump 16 through a connecting pipe, and the other end of the waste liquid transfer vacuum storage tank 15 is connected to the filter tank 3 through a connecting pipe. The purpose of this arrangement is that during acid extraction, the hot concentrated acid is drawn into the waste liquid transfer vacuum storage tank 15 without passing through the vacuum pump 16, thus avoiding corrosion of the pump by the acid solution.

[0023] The top cover 14, overflow cylinder 12, water washing tower column body 2, filter components, connecting pipes and filter tank 3 are made of clean PVC material or other acid and alkali resistant plastic material, and the square frame support 1 is made of stainless steel.

[0024] When using this high-purity quartz sand washing device, open the top cover 14 and pour the hot slurry mixed with concentrated acid from the upper acid washing device into the columnar body 2 of the washing tower. After the concentrated acid reaction is complete, open the valve on the connecting pipe between the bottom filter tank 3 and the waste liquid transfer vacuum tank 15, and turn on the vacuum pump 6 to pump the hot concentrated acid into the waste liquid transfer vacuum storage tank 15. After the concentrated acid is completely extracted, the valve and vacuum pump 7 are closed, and the bottom inlet 9 and side inlet 18 are opened to introduce deionized water mixed with a large number of air bubbles. The water pressure, air pressure and flow rate are adjusted to ensure that the water, gas and mortar are fully mixed. The quartz sand is suspended in the columnar body 4 of the washing tower under the action of water flow and air flow. The acid water from the washing is discharged through the overflow drain 13 of the top overflow cylinder 12. When the acidity and alkalinity of the discharged tail liquid reach the process value, the water pressure and air pressure of the bottom and side inlets are adjusted, the valve on the connecting pipe between the material pump 11 and the filter tank 3 is opened, the material pump 11 is turned on, and the mortar is extracted to proceed to the next process.

[0025] This high-purity quartz sand washing device enhances the barrier capacity of the filter plate 7 by using filter screen 9, effectively improving the interception of quartz sand, preventing its loss, reducing losses, and lowering production costs. The filter screen 9 is secured by the clamping mechanism of the filter plate 7, providing sufficient support to prevent damage and thus ensuring filtration capacity. The inlet 4 allows for reverse rinsing of the filter screen 9 and filter plate 7, while the side inlet 10 allows for lateral rinsing, maintaining the continuous filtration capacity of the filter screen 9 and filter plate 7. This prevents clogging of the filter components during continuous washing, effectively improving washing efficiency. This solves the problem of low washing efficiency caused by easy loss or clogging of quartz sand in existing devices.

Claims

1. A water washing device for high-purity quartz sand, comprising a square frame support (1), a columnar body of a water washing tower (2), a filter tank (3), and a filter assembly, characterized in that: The frame (1) is provided with a water washing tower columnar body (2), a filter tank (3) is arranged below the water washing tower columnar body (2), and a filter assembly is arranged between the filter tank (3) and the water washing tower columnar body (2); the bottom of the filter tank (3) is provided with a water inlet (4); the filter assembly is composed of an upper connecting flange (5), a transition flange (6), a double-layer filter screen plate (7) and a lower connecting flange (8) arranged in sequence from top to bottom, at least one layer of filter screen (9) is arranged between the filter screen plates (7); the transition flange (6) is uniformly provided with a side water inlet (10); the upper connecting flange (5) is welded with the water washing tower columnar body (2), and the lower connecting flange (8) is welded with the filter tank (3).

2. The device for washing high-purity quartz sand according to claim 1, characterized in that: The bottom of the water washing tower columnar body (2) is connected with a pumping pump (11), the top of the water washing tower columnar body (2) is provided with an overflow cylinder (12), the overflow cylinder (12) is provided with an overflow drain (13), and the top of the overflow cylinder (12) is provided with an upper cover (14).

3. The device for washing high-purity quartz sand according to claim 2, characterized in that: The pumping pump (11) is a diaphragm pump.

4. The device for washing high-purity quartz sand according to claim 1, characterized in that: The filter tank (3) on one side of the water inlet (4) is provided with a vacuum filtration mechanism.

5. The device for washing high-purity quartz sand according to claim 4, characterized in that: The vacuum filtration mechanism comprises a waste liquid transfer vacuum storage tank (15) and a vacuum pump (16), one end of the waste liquid transfer vacuum storage tank (15) is communicated with the vacuum pump (16) through a communication pipe, and the other end of the waste liquid transfer vacuum storage tank (15) is communicated with the filter tank (3) through a communication pipe.

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