Pickling device for quartz sand

Abstract

The utility model discloses a pickling device for quartz sand, which relates to the technical field of quartz sand pickling and comprises a pickling tank and a tank upper cover. A sand inlet and a liquid inlet are formed in the tank upper cover, a servo motor is arranged in the center of the upper side of the tank upper cover, a transmission shaft rod is arranged at the lower end of the servo motor, a plurality of transverse stirring rods are arranged on the side face of the transmission shaft rod at different heights, and a bottom stirring rod is arranged at the bottom; a sand outlet is formed in the center of the bottom of the pickling tank, an annular cavity is formed in the lower side of the pickling tank and located on the outer side of the sand outlet, a plurality of acid liquor filtering holes are formed in the bottom of the pickling tank and located on the top of the annular cavity, and a liquor outlet is formed in the annular cavity. The annular cavity is formed in the lower side of the pickling tank and located on the outer side of the sand outlet, and the acid liquor filtering holes are combined, so that quartz sand and acid liquor are separated, the utilization rate of the acid liquor is increased, three-dimensional turbulent flow is formed through the acid liquor filtering holes, and the pickling efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of quartz sand pickling, and particularly relates to a pickling device for quartz sand. Background Art

[0002] With the continuous improvement of the industrial requirement for the purity of quartz sand, the traditional pickling process faces challenges such as low efficiency, high acid consumption, and environmental pollution. As a key raw material in fields such as semiconductors and optical glass, impurities such as iron oxides and mica attached to the surface of quartz sand need to be removed through pickling. Existing technologies mostly rely on static immersion, resulting in problems such as uneven cleaning, long time consumption, and high cost of waste acid treatment. To meet the high-precision requirements and environmental protection requirements for quartz sand pickling, it is necessary to study the pickling device for quartz sand.

[0003] In the prior art, Chinese Patent CN219648229U discloses a quartz sand pickling device, including a pickling tank and a tank cover buckled on the top of the pickling tank. A servo motor is fixedly installed at the center of the top end of the tank cover, and a lifting cylinder is welded and fixedly arranged at the center of the bottom end of the tank cover. The motor shaft of the servo motor passes through one end of the tank cover and is fixedly connected to a driving shaft. The bottom end of the driving shaft passes through the lifting cylinder and is rotatably connected to the center of the inner bottom end of the pickling tank. A spiral blade that fits the inner wall of the lifting cylinder is constructed on the outer edge surface of the driving shaft, and a plurality of flow grooves are equidistantly arranged in a circular array at the top of the outer edge surface of the lifting cylinder. A circular groove one for fixing the sand feeding pipe is centrally arranged on one side of the top end of the tank cover, and a circular groove two is centrally arranged on the other side of the top end of the pickling tank.

[0004] However, the acid utilization rate of the above prior art is relatively low, and the pickling efficiency is relatively low. Summary of the Utility Model

[0005] This application provides a pickling device for quartz sand to solve the problems of relatively low acid utilization rate and relatively low pickling efficiency in the existing quartz sand pickling technology.

[0006] On the one hand, this application provides a pickling device for quartz sand, including: a pickling tank and a tank upper cover.

[0007] The tank upper cover is provided with a sand inlet and a liquid inlet. A servo motor is arranged at the center of the upper side of the tank upper cover. A transmission shaft rod is arranged at the lower end of the servo motor. The transmission shaft rod passes through the tank upper cover and enters the interior of the pickling tank. A plurality of transverse stirring rods are arranged at different heights on the side surface of the transmission shaft rod. A bottom stirring rod is arranged at the bottom of the transmission shaft rod. The shape of the bottom stirring rod is adapted to the cross-sectional shape of the bottom of the pickling tank.

[0008] A sand outlet is provided at the center of the bottom of the pickling tank. An annular chamber is provided on the lower side of the pickling tank and outside the sand outlet. A number of acid liquid filter holes are provided at the bottom of the pickling tank and on top of the annular chamber. The annular chamber is provided with a liquid outlet.

[0009] In a possible implementation, an annular piston is provided inside the annular chamber. A number of lead screw motors are provided on the lower side of the annular chamber. The lead screw motors are used to control the up and down sliding of the annular piston inside the annular chamber.

[0010] When the position of the annular piston is at the top of the annular chamber, the acid liquid filter holes are blocked by the annular piston.

[0011] When the position of the annular piston is at the bottom of the annular chamber, the bottom of the liquid outlet is flush with the top of the annular piston.

[0012] In a possible implementation, a number of shovel blades are provided on the lower side of the bottom stirring rod and arranged in the same rotation direction.

[0013] The bottom of the shovel blade is in sliding contact with the bottom of the pickling tank.

[0014] In a possible implementation, a sand inlet valve, a liquid inlet valve, a sand outlet valve, and a liquid outlet valve are respectively provided at the sand inlet, the liquid inlet, the sand outlet, and the liquid outlet.

[0015] In a possible implementation, an air outlet and a barometer are provided on the tank upper cover.

[0016] An air outlet valve is provided at the air outlet. An air outlet filter screen is provided at the bottom of the air outlet.

[0017] In a possible implementation, an observation window is provided on the side wall of the pickling tank.

[0018] In a possible implementation, the bottom of the pickling tank is in the shape of a flat bottom in the center combined with an annular inclined surface.

[0019] A pickling device for quartz sand in this application has the following advantages:

[0020] By providing an annular chamber on the lower side of the pickling tank and outside the sand outlet, combined with the acid liquid filter holes, the quartz sand is separated from the acid liquid, improving the utilization rate of the acid liquid, and forming a three-dimensional turbulent flow through the acid liquid filter holes, improving the pickling efficiency.

[0021] The proposed annular piston and lead screw motor can control the up and down sliding of the annular piston inside the annular chamber through the lead screw motor, and can selectively control the entry or non-entry of acid solution into the annular chamber, improving the flexibility of acid solution utilization.

[0022] On the lower side of the proposed bottom stirring rod and arranged in the same rotation direction, there are several shovels. The bottom of the shovels is in sliding contact with the bottom of the pickling tank, and by stirring the quartz sand at the bottom, the pickling efficiency is improved.

[0023] The proposed tank upper cover is provided with an air outlet and a barometer. The air outlet is provided with an air outlet valve, and an air outlet filter screen is arranged at the bottom of the air outlet. It can control the discharge of harmful gases according to the change of air pressure, improving the pickling safety and stability. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only 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.

[0025] Figure 1 It is a cross-sectional structure schematic diagram of a pickling device for quartz sand when the annular piston is closed provided by an embodiment of the present application;

[0026] Figure 2 It is a cross-sectional structure schematic diagram of a pickling device for quartz sand when the annular piston is opened provided by an embodiment of the present application;

[0027] Figure 3 It is a schematic diagram of the overall structure of a pickling device for quartz sand provided by an embodiment of the present application.

[0028] Explanation of the Reference Numerals in the Drawings:

[0029] 1 - Pickling tank, 2 - Tank upper cover, 21 - Sand inlet, 211 - Sand inlet valve, 22 - Liquid inlet, 221 - Liquid inlet valve, 23 - Servo motor, 231 - Transmission shaft rod, 232 - Horizontal stirring rod, 233 - Bottom stirring rod, 234 - Shovel, 24 - Air outlet, 241 - Air outlet valve, 242 - Air outlet filter screen, 25 - Barometer, 11 - Sand outlet, 111 - Sand outlet valve, 12 - Annular chamber, 13 - Acid solution filter hole, 121 - Annular piston, 122 - Lead screw motor, 123 - Liquid outlet, 124 - Liquid outlet valve, 14 - Observation window. Detailed Embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0031] As Figures 1 to 3 shown, the embodiment of the present application provides a pickling device for quartz sand, including: a pickling tank 1 and a tank upper cover 2.

[0032] The tank upper cover 2 is provided with a sand inlet 21 and a liquid inlet 22. A servo motor 23 is provided at the center of the upper side of the tank upper cover 2. A transmission shaft rod 231 is provided at the lower end of the servo motor 23. The transmission shaft rod 231 passes through the tank upper cover 2 and enters the interior of the pickling tank 1. A plurality of transverse stirring rods 232 are provided at different heights on the side surface of the transmission shaft rod 231. A bottom stirring rod 233 is provided at the bottom of the transmission shaft rod 231. The shape of the bottom stirring rod 233 is adapted to the cross-sectional shape of the bottom of the pickling tank 1.

[0033] A sand outlet 11 is provided at the center of the bottom of the pickling tank 1. An annular chamber 12 is provided on the lower side of the pickling tank 1 and outside the sand outlet 11. A plurality of acid liquid filter holes 13 are provided at the bottom of the pickling tank 1 and on the top of the annular chamber 12. The annular chamber 12 is provided with a liquid outlet 123.

[0034] Specifically, in this embodiment, the pickling tank 1 and the tank upper cover 2 are hermetically fixedly connected by bolts. In other possible embodiments, clamping, welding, threaded connection and other methods can also be used for hermetic fixed connection.

[0035] In this embodiment, four transverse stirring rods 232 are provided, and their heights are all different to cover a larger stirring range.

[0036] In this embodiment, during the pickling process, the liquid outlet 123 of the annular chamber 12 is connected to the liquid inlet 22 through a delivery pump and a delivery pipeline, so that the acid liquid recovered from the acid liquid filter holes 13 is put into the pickling tank 1 again for circulating pickling. During this process, tiny eddies will be generated at the acid liquid filter holes 13 to form three-dimensional turbulent flow, improving the pickling efficiency. After the pickling is completed, the liquid outlet 123 of the annular chamber 12 is connected to an acid liquid recovery tank through a delivery pump and a delivery pipeline to separate the quartz sand from the acid liquid.

[0037] Exemplarily, an annular piston 121 is disposed inside the annular chamber 12, and a plurality of lead screw motors 122 are disposed below the annular chamber 12. The lead screw motors 122 are configured to control the annular piston 121 to slide up and down inside the annular chamber 12.

[0038] As Figure 1 shown, when the annular piston 121 is at the top of the annular chamber 12, the acid liquid filter hole 13 is blocked by the annular piston 121.

[0039] As Figure 2 shown, when the annular piston 121 is at the bottom of the annular chamber 12, the bottom of the liquid outlet 123 is flush with the top of the annular piston 121.

[0040] Specifically, in this embodiment, two lead screw motors 122 are symmetrically arranged. By synchronously controlling the two lead screw motors 122, the annular piston 121 can be stably slid up and down inside the annular chamber 12.

[0041] Exemplarily, a plurality of shovel blades 234 are disposed below the bottom stirring rod 233 and arranged in the same rotation direction.

[0042] The bottom of the shovel blade 234 is in sliding contact with the bottom of the pickling tank 1.

[0043] Specifically, in this embodiment, four shovel blades 234 are provided, and the lateral distances from the transmission shaft rod 231 are all different, so as to cover a larger stirring range.

[0044] Exemplarily, the sand inlet 21, the liquid inlet 22, the sand outlet 11, and the liquid outlet 123 are respectively provided with a sand inlet valve 211, a liquid inlet valve 221, a sand outlet valve 111, and a liquid outlet valve 124.

[0045] Exemplarily, the tank upper cover 2 is provided with an air outlet 24 and a barometer 25.

[0046] The air outlet 24 is provided with an air outlet valve 241, and an air outlet filter screen 242 is disposed at the bottom of the air outlet 24.

[0047] Specifically, in this embodiment, the air outlet 24 is connected to a gas treatment device through an exhaust pump and an exhaust pipeline, such as a gas absorption tank containing NaOH solution, etc.

[0048] As Figure 3 shown, exemplarily, an observation window 14 is provided on the side wall of the pickling tank 1.

[0049] Specifically, through the observation window 14, the pickling process and the operation status of the device in the pickling tank 1 can be visually monitored.

[0050] Exemplarily, the bottom of the pickling tank 1 has a shape of a central flat bottom combined with an annular inclined plane.

[0051] Specifically, in this embodiment, by setting the bottom of the pickling tank 1 to the shape of a central flat bottom combined with an annular inclined plane, cooperating with the bottom stirring rod 233 and the shoveling blade 234 that are adapted to the cross-sectional shape of the bottom of the pickling tank 1, it is convenient to concentrate the quartz sand to the middle position, thereby improving the stirring efficiency and facilitating the discharge of the quartz sand after pickling.

[0052] In this embodiment, a specific operation process of a pickling device for quartz sand is as follows: In the initial state, the sand inlet valve 211, the liquid inlet valve 221, the sand outlet valve 111, the liquid outlet valve 124, and the air outlet valve 241 are all closed, and the position of the annular piston 121 is at the top of the annular chamber 12; Open the sand inlet valve 211 and the liquid inlet valve 221, and input the quartz sand to be pickled and the acid liquid into the interior of the pickling tank 1 respectively, and then close the sand inlet valve 211 and the liquid inlet valve 221; Control the servo motor 23 to start, and the servo motor 23 drives the horizontal stirring rod 232, the bottom stirring rod 233, and the shoveling blade 234 to stir through the transmission shaft rod 231; During this process, control the opening and closing and the opening and closing degree of the air outlet valve 241 according to the change of the air pressure displayed by the barometer 25; Connect the liquid outlet 123 of the annular chamber 12 to the liquid inlet 22 through a delivery pump and a delivery pipeline, open the liquid inlet valve 221, control the lead screw motor 122 to slide the annular piston 121 to the bottom of the annular chamber 12, and open the liquid outlet valve 124. At this time, the bottom of the liquid outlet 123 is flush with the top of the annular piston 121; The acid liquid in the pickling tank 1 enters the annular chamber 12 from the acid liquid filter holes 13, and circulates back to the pickling tank 1 through the liquid outlet 123, the delivery pump, the delivery pipeline, and the liquid inlet 22; After pickling is completed, close the liquid inlet valve 221, connect the liquid outlet 123 of the annular chamber 12 to the acid liquid recovery tank through a delivery pump and a delivery pipeline; After the acid liquid is recovered, close the liquid outlet valve 124, control the lead screw motor 122 to slide the annular piston 121 to the top of the annular chamber 12, open the sand outlet valve 111, and wait until the quartz sand is completely discharged, then control the servo motor 23 to close and close the sand outlet valve 111.

[0053] The above is only an example of the operation process of a pickling device for quartz sand in this application. In other possible embodiments, other possible operation processes can also be designed according to the structure of the pickling device for quartz sand in this application.

[0054] In the embodiment of the present application, an annular chamber 12 is provided below the pickling tank 1 and outside the sand outlet 11. In combination with the acid liquid filter holes 13, the quartz sand is separated from the acid liquid, improving the utilization rate of the acid liquid, and a three-dimensional turbulent flow is formed through the acid liquid filter holes 13, improving the pickling efficiency.

[0055] The proposed annular piston 121 and the lead screw motor 122 are such that the lead screw motor 122 controls the up and down sliding of the annular piston 121 inside the annular chamber 12, and can selectively control the entry or non-entry of the acid liquid into the annular chamber 12, improving the flexibility of acid liquid utilization.

[0056] Below the proposed bottom stirring rod 233 and arranged in the same rotation direction are a number of shoveling blades 234. The bottom of the shoveling blades 234 is in sliding contact with the bottom of the pickling tank 1, and the pickling efficiency is improved by agitating the quartz sand at the bottom.

[0057] The proposed tank upper cover 2 is provided with an air outlet 24 and a barometer 25. The air outlet 24 is provided with an air outlet valve 241, and the bottom of the air outlet 24 is provided with an air outlet filter screen 242. The discharge of harmful gases can be controlled according to the change of air pressure, improving the pickling safety and stability.

[0058] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0059] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An acid pickling device for quartz sand, characterized in that, Including: Pickling tank, tank cover; The tank cover is provided with a sand inlet, a liquid inlet. A servo motor is arranged at the center of the upper side of the tank cover. A transmission shaft rod is arranged at the lower end of the servo motor. The transmission shaft rod passes through the tank cover and enters the interior of the pickling tank. A number of transverse stirring rods are arranged at different heights on the side of the transmission shaft rod. A bottom stirring rod is arranged at the bottom of the transmission shaft rod. The shape of the bottom stirring rod is adapted to the cross-sectional shape of the bottom of the pickling tank; An outlet is arranged at the center of the bottom of the pickling tank. An annular chamber is arranged on the lower side of the pickling tank and outside the outlet. A number of acid liquid filter holes are arranged at the bottom of the pickling tank and on the top of the annular chamber. The annular chamber is provided with a liquid outlet.

2. The pickling device for quartz sand according to claim 1, characterized in that, An annular piston is arranged inside the annular chamber. A number of lead screw motors are arranged on the lower side of the annular chamber. The lead screw motors are used to control the up and down sliding of the annular piston inside the annular chamber; When the position of the annular piston is at the top of the annular chamber, the acid liquid filter holes are blocked by the annular piston; When the position of the annular piston is at the bottom of the annular chamber, the bottom of the liquid outlet is flush with the top of the annular piston.

3. The pickling device for quartz sand according to claim 1, characterized in that, A number of shovel blades are arranged on the lower side of the bottom stirring rod and in the same rotation direction; The bottom of the shovel blade is in sliding contact with the bottom of the pickling tank.

4. The pickling device for quartz sand according to claim 1, characterized in that, The sand inlet, the liquid inlet, the sand outlet, and the liquid outlet are respectively provided with a sand inlet valve, a liquid inlet valve, a sand outlet valve, and a liquid outlet valve.

5. The pickling device for quartz sand according to claim 1, characterized in that, The tank cover is provided with an air outlet and a barometer; The air outlet is provided with an air outlet valve. An air outlet filter screen is arranged at the bottom of the air outlet.

6. The pickling device for quartz sand according to claim 1, characterized in that, An observation window is arranged on the side wall of the pickling tank.

7. The pickling device for quartz sand according to claim 1, characterized in that, The bottom of the pickling tank is in the shape of a flat bottom in the center combined with an annular inclined plane.

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