Pickling quartz sand cleaning device and cleaning method

Abstract

The invention discloses a pickling quartz sand cleaning device and a cleaning method, cleaning water around pickling quartz sand is continuously replaced by subsequent cleaning water by utilizing the flow velocity difference between the cleaning water and the quartz sand so as to achieve the purpose of cleaning, and meanwhile, the quartz sand can be separated from the cleaning water by virtue of the speed difference so as to achieve the purpose of cleaning. The moisture content of the pickled quartz sand meets the requirement of a drying process through a vacuum dehydration device of the sand discharging device; firstly, acid pickling quartz sand is guided to the speed regulation plate device through the feeding device and is driven by spraying water flow to roll and move along the speed regulation plate device, and high-speed water flow is thrown away from the speed regulation plate device under the inertia effect, falls into the water outlet device and is collected; the low-speed quartz sand falls onto the next-stage speed regulation plate device from a gap between the speed regulation plate device and the water outlet device, and a first-stage cleaning process is completed; after being subjected to a plurality of stages of cleaning processes, the quartz sand finally falls into a sand discharging device and is subjected to vacuum dehydration, and the acid-pickled quartz sand with the cleanliness and the water content meeting the requirements is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of ultrapure quartz sand production, and in particular to an acid-washed quartz sand cleaning device and a cleaning method. Background Art

[0002] The pickling process or chemical treatment process is an indispensable process in the production process of ultra-pure quartz sand. Its essence is to use chemical reagents to chemically treat quartz sand to remove iron oxides and hydroxides precipitated on the surface of quartz sand or in cracks, as well as fine impurity minerals embedded on the surface of quartz particles. This is because in the process of crushing and physically purifying quartz ore, only the impurity minerals existing alone in quartz sand can be removed, but the impurity minerals embedded on the surface of quartz particles cannot be removed. The waste acid liquid after pickling quartz sand contains a high concentration of impurity metal elements, so the waste acid liquid must be removed through a cleaning process to obtain high-purity pickled quartz sand.

[0003] At present, there are many technical solutions related to quartz sand cleaning in the prior art, among which there are 9 technologies and devices that can be used for cleaning pickled quartz sand, which are as follows:

[0004] Lianyungang Jingzu New Materials Technology Co., Ltd. disclosed the "Quartz Sand Purification and Cleaning Device and Process" invention patent (publication number CN102029271A) and utility model patent (publication number CN102029172B), which completes the pickling, cleaning and filtration of quartz sand in the same tank, and the cleaning is carried out by backwashing.

[0005] The invention patent (publication number CN109226033A) and utility model patent (publication number CN109226033B) of "quartz sand cleaning device" disclosed by Xinyi Epitaxy Quartz Materials Co., Ltd. mainly place the cleaning frame with stirring function into the pickling tank and the cleaning tank in turn under mechanical action, and obtain ideal pickling and cleaning effects through stirring.

[0006] The invention patent of "Quartz Sand Purification Device and Its Use Method" (publication number CN109052419A) disclosed by Lianyungang Yuhua Minerals Co., Ltd. is mainly a set of devices integrating quartz sand flotation, acid leaching and flushing. The flushing process is to use a high-pressure nozzle to flush the quartz sand in the flushing tank.

[0007] The invention patent (publication number CN109304325A) and utility model patent (publication number CN109304325B) of "A quartz sand cleaning device" disclosed by Jiaxing Haoyi Home Textile Co., Ltd. mainly use a mechanically driven slide to stir the quartz sand in the material box back and forth to achieve the purpose of cleaning the quartz sand.

[0008] The invention patent "An improved method for pickling and purification of high-purity quartz sand" (publication number CN110436468A) disclosed by Inner Mongolia Huachen Renewable Resources Technology Co., Ltd. mainly completes the pickling and cleaning processes in a rotating reactor.

[0009] The utility model patent for "an automatic cleaning quartz sand filter" (publication number CN210751449U) disclosed by Donghai County Tongcheng Quartz Material Technology Co., Ltd. mainly backwashes the quartz sand in the quartz sand cylinder under the action of mechanical stirring to achieve the cleaning of the quartz sand.

[0010] The utility model patent for "a material cleaning device" (publication number CN209502415U) disclosed by Jiangsu Fengri Quartz Technology Co., Ltd. mainly uses explosion to make the quartz sand in the cleaning cylinder flip in the cleaning water to achieve the cleaning effect.

[0011] The utility model patent (publication number CN217700381U) of "A high-purity quartz sand purification and pickling device" disclosed by Lingshou County Liming Mineral Products Co., Ltd. mainly places a cleaning box with a stirring function into the pickling tank, cleaning tank and drying tank in turn under mechanical action, and obtains ideal pickling and cleaning effects through stirring.

[0012] The invention patent of "A quartz sand cleaning and drying integrated equipment" (publication number CN118023199A) disclosed by Hunan Huaxi New Materials Technology Co., Ltd. mainly stirs and cleans quartz sand through a rotating drum and a stirring frame.

[0013] In the above patents, in order to obtain the ideal cleaning effect for pickled quartz sand, methods such as flipping, stirring, aeration, and backwashing are mainly used to form relative movement between quartz sand and cleaning water, so that the pickling waste liquid saturated in the quartz sand is continuously diluted and taken away by the cleaning water, thereby achieving the cleaning purpose. However, the process of achieving the cleaning effect of pickled quartz sand by flipping the cleaning device has very high requirements for the motor, and the motor loss rate is very large; the process of achieving the cleaning effect by stirring the pickled quartz sand, the stirring device pollutes the quartz sand more; the process of stirring the pickled quartz sand by aeration to achieve the cleaning effect is difficult to stir the quartz sand completely and evenly in the water, affecting the cleaning effect; cleaning the pickled quartz sand by backwashing process not only requires the backwashing cleaning water to have a large pressure, but also it is difficult to achieve complete and even cleaning of the quartz sand.

[0014] In addition, the pickled quartz sand after cleaning still contains a lot of cleaning water. The water content of the pickled quartz sand is high. In the subsequent drying process, it not only consumes more energy, but also has a great adverse effect on the feeding process of the drying process. Summary of the invention

[0015] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0016] In view of the problems existing in the above-mentioned existing methods for cleaning pickled quartz sand, the present invention is proposed.

[0017] Therefore, the object of the present invention is to provide a pickled quartz sand cleaning device and a cleaning method to solve the problems that the existing method of cleaning pickled quartz sand is insufficient in cleaning effect and has a large influence of various factors on the one hand, and the excessively high water content is not conducive to the subsequent drying process on the other hand.

[0018] In order to solve the above technical problems, the present invention provides the following technical solutions: a pickled quartz sand cleaning device, comprising a cleaning box, a feeding device, a speed regulating plate device, a spraying device, a water outlet device, a sand retaining plate, a sand outlet device, an inspection port, and a supporting platform; the feeding device is composed of a feeding port arranged at the top edge of the cleaning box, a pickling equipment outlet and a feeding hose, and the feeding port is connected to the pickling equipment outlet through the feeding hose; the speed regulating plate device is composed of an acceleration plate, a buffer plate and a flat throwing plate, and the acceleration plate, the buffer plate and the left and right sides of the flat throwing plate are all connected to the side wall of the cleaning box, the upper edge of the acceleration plate is connected to the top plate of the cleaning box, and the lower edge is connected to the buffer plate, and the lower edge of the buffer plate is connected to the flat throwing plate The accelerator plate is connected, and the accelerator plate is arranged below the feed port; the spray device is composed of a spray pipe, a connecting water pipe, and a high-pressure water source; the spray pipe is horizontally arranged above the accelerator plate, and its two ends are fixed to the two side walls of the cleaning box; the connecting water pipe connects the spray pipe and the high-pressure water source; the high-pressure water source comprises a water storage tank with a valve, a water pump, a water inlet hose and a water outlet hose; the water inlet hose connects the water storage tank with a valve and the water inlet of the water pump, and the water outlet hose connects the water outlet of the water pump and the connecting water pipe; the water outlet device comprises a water receiving plate, a water guide plate, a water outlet pipe, a waste water tank with a valve and a waste water hose; the water receiving plate is inclined at a small angle toward the water guide plate, and its two sides are connected to the side walls of the cleaning box, and its position is lower than the flat-throwing The plate receives the cleaning waste water thrown out by the flat throwing plate, the water guide plate is uprightly arranged, and the upper end is connected to the bottom end of the water receiving plate to guide the cleaning waste water to flow to the water outlet pipe at the bottom of the cleaning box, and the waste water tank with a valve is connected to the water outlet pipe through the waste water hose; the sand baffle plate is two upright baffle plates, and the two sides are connected to the side walls of the cleaning box, the upper end of one sand baffle plate is connected to the lower edge of the flat throwing plate, the upper end of the other sand baffle plate is connected to the upper edge of the water receiving plate, and the lower end is connected to the acceleration plate of the speed regulating plate device of the next level, and at the same time, the spray hole of the spray pipe of the next level passes through the upper part of the other sand baffle plate; the sand discharge device includes a sand discharge pipe, a quartz sand dewatering bucket, a sand discharge hose, a vacuum device and a vacuum connecting pipe. The sand outlet pipe is arranged at the bottom of the cleaning box, at the center of the rectangular space surrounded by the sand retaining plate of the last stage and the two side walls of the cleaning box. The quartz sand dehydration barrel is composed of a cover plate, a suction filter barrel and a suction filter bag. A sand inlet pipe is arranged on the cover plate. The suction filter bag is supported by a filter plate with holes at the lower part of the suction filter barrel, so that there is a suction filter space for exhausting air and dehydration between the suction filter bag and the bottom of the suction filter barrel. A suction filter pipe is arranged on the side wall of the suction filter space. The sand outlet hose connects the sand outlet pipe and the sand inlet pipe on the cover plate of the quartz sand dehydration barrel. The vacuum device is composed of a buffer tank and a vacuum unit. The vacuum unit and the buffer tank are connected as a whole. The vacuum connecting pipe connects the suction filter pipe at the lower part of the quartz sand dehydration barrel and the buffer tank.The support platform is provided with support feet under the platform, the cleaning box and the high-pressure water source of the spray device are placed on the platform; the inspection port is provided at the lower part of the cleaning box. ;

[0019] As a preferred solution of the pickled quartz sand cleaning device described in the present invention, wherein: the acceleration plate has a larger inclination angle, the buffer plate has a smaller inclination angle than the acceleration plate, and the flat polishing plate is arranged horizontally.

[0020] As a preferred solution of the pickled quartz sand cleaning device described in the present invention, a diverter baffle is provided on the acceleration plate.

[0021] As a preferred solution of the pickled quartz sand cleaning device described in the present invention, horizontal spray holes are arranged on the spray pipe.

[0022] As a preferred embodiment of the pickled quartz sand cleaning device of the present invention, the water receiving plate and the acceleration plate have the same inclination direction.

[0023] As a preferred solution of the pickled quartz sand cleaning device described in the present invention, the cleaning box is a rectangular closed box.

[0024] In order to solve the above technical problems, the present invention also provides the following technical solutions:. A method for cleaning pickled quartz sand, using the pickled quartz sand cleaning device described above, comprises the following steps: S1, introducing ultrapure water into a water storage tank with a valve in a high-pressure water source of a spray device, opening the valve, starting a water pump, and spraying the ultrapure water onto an accelerator plate of a speed regulating plate device through a spray hole on a spray pipe; S2, introducing the pickled quartz sand onto an accelerator plate of a speed regulating plate device in a cleaning box through a feeding device; S3, the pickled quartz sand falling onto the accelerator plate is continuously rolled and accelerated to move toward a buffer plate under the flushing of the spray water flow; relative to the accelerator plate, the angle of the buffer plate is reduced, and after reaching the buffer plate, the speed of the pickled quartz sand is reduced, while the speed of the flushing water flow is further increased, and the speed difference between the pickled quartz sand and the flushing water flow is further expanded, resulting in the cleaning water around the flowing quartz sand being continuously replaced by subsequent clean water flow, and quickly cleaned; S4, when the high-speed water flow carries the low-speed pickled quartz sand to the flat throwing plate, the high-speed water flow is flat thrown and thrown under the action of inertia. The wastewater passes through the gap between the flat throwing plate and the water receiving plate, falls directly onto the water receiving plate of the water outlet device, and under the guidance of the water guide plate, flows into the wastewater tank with a valve through the water outlet pipe, and most of the cleaning wastewater is separated from the cleaned pickled quartz sand; while the low-speed pickled quartz sand falls into the gap between the flat throwing plate and the water receiving plate under the action of gravity, and is guided into the next level of cleaning process through the sand retaining plate; S5, for the pickled quartz sand introduced into the next level acceleration plate, the S3 and S4 cleaning processes are repeated. Until the cleanliness of the pickled quartz sand meets the requirements; S6, the pickled quartz sand that has undergone the S5 cleaning process finally flows into the quartz sand dehydration barrel through the sand outlet pipe of the sand outlet device, the vacuum unit of the vacuum device is turned on, and the quartz sand dehydration barrel is evacuated through the buffer tank. Under the action of vacuum, the residual cleaning water in the pickled quartz sand passes through the suction filter bag and the perforated filter plate, the suction filter pipe and the vacuum connecting pipe, and enters the buffer tank, so that the cleaning water content in the cleaned pickled quartz sand meets the requirements of the drying process, and the cleaning is completed.

[0025] Beneficial effects of the present invention: The present invention provides a cleaning device and a cleaning method for pickled quartz sand, which drives the pickled quartz sand to roll and move on the inclined speed regulating plate device by a cleaning water flow, and a certain speed difference is generated between the cleaning water flow and the pickled quartz sand, so that the cleaning water around the pickled quartz sand is continuously replaced by subsequent clean cleaning water, so as to achieve fast and efficient cleaning of the pickled quartz sand; at the same time, the speed difference between the cleaning water flow and the pickled quartz sand can also separate most of the cleaning water from the pickled quartz sand, and further dehydrate the pickled quartz sand through a vacuum device, so that the residual cleaning water (water content) of the pickled quartz sand can meet the requirements of the drying process. The present invention avoids possible contamination of the pickled quartz sand during the cleaning process, can perfectly clean the pickled quartz sand without dead ends, and the water content of the pickled quartz sand can meet the requirements of the drying process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0027] Figure 1 This is a schematic structural diagram of the pickled quartz sand cleaning device provided by the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the diverter baffle on the accelerator plate provided by the present invention.

[0029] Figure 3 The present invention provides a method flow chart of the pickled quartz sand cleaning method.

[0030] Legend:

[0031] 1. Cleaning box;

[0032] 2. Pickling quartz sand feeding device: 21. Feeding port; 22. Pickling equipment discharge port; 23. Discharge hose;

[0033] 3. Speed ​​regulating plate device: 31. Acceleration plate; 32. Buffer plate; 33. Flat throwing plate;

[0034] 4. Spraying device: 41. Spraying pipe; 42. Connecting water pipe; 43. High-pressure water source; 431. Water storage tank with valve; 432. Water pump; 433. Water inlet hose; 434. Water outlet hose;

[0035] 5. Water outlet device: 51. Water receiving plate; 52. Water guide plate; 53. Water outlet pipe; 54. Waste water tank with valve; 55. Water outlet hose;

[0036] 6. Sand retaining plate: 61. Sand retaining plate connected to the flat throwing plate; 62. Sand retaining plate connected to the water receiving plate;

[0037] 7. Sand discharge device: 71. Sand discharge pipe; 72. Quartz sand dewatering bucket; 73. Sand discharge hose; 74. Vacuum device; 75. Vacuum connecting pipe;

[0038] 8. Inspection port;

[0039] 9. Support platform. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0042] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0043] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0044] Example

[0045] The process of achieving the cleaning effect of pickled quartz sand by flipping the cleaning device has very high requirements on the motor and the motor loss rate is very large; the process of achieving the cleaning effect by stirring the pickled quartz sand causes the stirring device to pollute the quartz sand more; the process of achieving the cleaning effect by stirring the pickled quartz sand by explosion makes it difficult to stir the quartz sand completely and evenly in the water, affecting the cleaning effect; cleaning the pickled quartz sand by backwashing process not only requires the backwashing cleaning water to have a very high pressure, but also makes it difficult to achieve complete and even cleaning of the quartz sand.

[0046] In addition, the pickled quartz sand after cleaning still contains a lot of cleaning water. The water content of the pickled quartz sand is high. In the subsequent drying process, it not only consumes more energy, but also has a great adverse effect on the feeding process of the drying process.

[0047] Therefore, refer to Figure 1 and Figure 2 The present invention provides an acid-washed quartz sand cleaning device, comprising a cleaning box 1, a feeding device 2, a speed regulating plate device 3, a spray device 4, a water outlet device 5, a sand retaining plate 6, a sand outlet device 7, an inspection port 8, and a supporting platform 9.

[0048] The cleaning box 1 is a closed box in the shape of a rectangular parallelepiped.

[0049] The feeding device 2 is composed of a feeding port 21 arranged at the top edge of the cleaning box 1 , a pickling equipment outlet 22 and a feeding hose 23 . The feeding port 21 is connected to the pickling equipment outlet 22 via the feeding hose 23 .

[0050] The speed regulating plate device 3 is composed of an acceleration plate 31, a buffer plate 32, and a flat throwing plate 33. The left and right sides of the acceleration plate 31, the buffer plate 32, and the flat throwing plate 33 are connected to the side walls of the cleaning box 1. The upper edge of the acceleration plate 31 is connected to the top plate of the cleaning box 1, and the lower edge is connected to the buffer plate 32. The lower edge of the buffer plate 32 is connected to the flat throwing plate 33. The acceleration plate 31 is arranged below the feed port 21 of the cleaning box 1 and has a larger inclination angle. The inclination angle of the buffer plate 32 is smaller than that of the acceleration plate 31, and the flat throwing plate 33 is arranged horizontally. In addition, a diversion baffle ( Figure 2 ) to quickly disperse the pickled quartz sand on the acceleration plate 31 to the entire acceleration plate 31 under the action of the spray water flow.

[0051] The spray device 4 is composed of a spray pipe 41, a connecting water pipe 42, and a high-pressure water source 43; the spray pipe 41 is horizontally arranged above the acceleration plate 31, and its two ends are fixed to the two side walls of the cleaning box 1. The spray pipe 41 is provided with horizontal spray holes, so that the pickled quartz sand begins to be washed and dispersed by the spray water during the falling process; the connecting water pipe 42 connects the spray pipe 41 and the high-pressure water source 43; the high-pressure water source 43 includes a water storage tank 431 with a valve, a water pump 432, a water inlet hose 433, and a water outlet hose 434. The water inlet hose 433 connects the water storage tank 431 with a valve and the water inlet of the water pump 432, and the water outlet hose 434 connects the water outlet of the water pump 432 and the connecting water pipe 42.

[0052] The water outlet device 5 includes a water receiving plate 51, a water guide plate 52, a water outlet pipe 53, a waste water tank 54 with a valve, and a waste water hose 55; the water receiving plate 51 is inclined to the water guide plate 52 at a small angle (consistent with the inclination direction of the acceleration plate 31), and is connected to the side walls of the cleaning box 1 on both sides. It is located lower than the horizontal throwing plate 33 and receives the cleaning waste water thrown out by the horizontal throwing plate 33; the water guide plate 52 is upright, and the upper end is connected to the bottom end of the water receiving plate 51 to guide the cleaning waste water to flow to the water outlet pipe 53 at the bottom of the cleaning box 1; the waste water tank 54 with a valve is connected to the water outlet pipe 53 through a waste water hose 55.

[0053] The sand retaining plate 6 is composed of two upright retaining plates, both sides of which are connected to the side walls of the cleaning box 1. The upper end of one sand retaining plate 61 is connected to the lower edge of the flat polishing plate 33, the upper end of the other sand retaining plate 62 is connected to the upper edge of the water receiving plate 51, and the lower end is connected to the acceleration plate 31 of the next-level speed regulating plate device 3. At the same time, the spray hole of the next-level spray pipe 41 passes through the upper part of the sand retaining plate 62. In this way, when the pickled quartz sand guided by the sand retaining plate 6 enters the next-level cleaning process, the cleaning water can pass through the sand retaining plate 62 to rinse the pickled quartz sand entering the next-level cleaning process.

[0054] The sand discharge device 7 comprises a sand discharge pipe 71, a quartz sand dewatering barrel 72, a sand discharge hose 73, a vacuum device 74, and a vacuum connecting pipe 75; the sand discharge pipe 71 is arranged at the bottom of the cleaning box 1, at the center of the rectangular space surrounded by the last-stage sand retaining plate 6 (two pieces, 61 and 62) and the two side walls of the cleaning box 1; the quartz sand dewatering barrel 72 is composed of a cover plate, a suction filter barrel body, and a suction filter bag, a sand inlet pipe is arranged on the cover plate, a filter plate with holes is used to support the suction filter bag at the bottom of the suction filter barrel, so that there is a suction filter space for exhausting and dehydrating between the suction filter bag and the bottom of the suction filter barrel, and a suction filter pipe is arranged on the side wall of the suction filter space; the sand discharge hose 73 connects the sand discharge pipe 71 and the sand inlet pipe on the cover plate of the quartz sand dewatering barrel 72; the vacuum device 74 is composed of a buffer tank and a vacuum unit, and the vacuum unit and the buffer tank are connected as a whole; the vacuum connecting pipe 75 connects the suction filter pipe at the bottom of the quartz sand dewatering barrel 72 and the buffer tank of the vacuum device 74.

[0055] An inspection port 9 is provided at the lower portion of the cleaning box 1 for maintenance of the cleaning box 1 .

[0056] The supporting platform 8 is provided with supporting feet under the platform, and the cleaning box 1 and the high-pressure water source 43 of the spray device 4 are placed on the platform.

[0057] See also Figure 3 The present invention also provides a method for cleaning pickled quartz sand, which uses the above pickled quartz sand cleaning device and includes the following steps:

[0058] S1, introducing ultrapure water into the water storage tank 431 with a valve in the high-pressure water source 43 of the spray device 4, opening the valve, starting the water pump 432, so that the ultrapure water is sprayed onto the acceleration plate 31 of the speed regulating plate device 3 through the spray holes on the spray pipe 41;

[0059] S2, introducing the pickled quartz sand into the acceleration plate 31 of the speed regulating plate device 3 in the cleaning box 1 through the feeding device 2;

[0060] S3, the pickled quartz sand falling on the acceleration plate 31 is continuously rolled and accelerated to the buffer plate 32 under the flushing of the spray water flow; the angle of the buffer plate 32 is lower than that of the acceleration plate 31, so after reaching the buffer plate 32, the speed of the pickled quartz sand is reduced, while the speed of the flushing water flow is further increased, and the speed difference between the pickled quartz sand and the flushing water flow is further expanded, resulting in the cleaning water around the flowing quartz sand being continuously replaced by the subsequent clean water flow, so as to achieve the purpose of rapid cleaning;

[0061] S4, when the high-speed water flow carries the low-speed pickled quartz sand to the flat-throwing plate 33, the high-speed water flow is flat-thrown under the action of inertia, and throws over the gap between the flat-throwing plate 33 and the water receiving plate 51, and directly falls on the water receiving plate 51 of the water outlet device 5, and under the guidance of the water guide plate 52, flows into the waste water tank 54 with a valve through the water outlet pipe 53. At this point, most of the cleaning wastewater is separated from the cleaned pickled quartz sand; and the low-speed pickled quartz sand falls into the gap between the flat-throwing plate 33 and the water receiving plate 51 under the action of gravity, and is guided into the next level of cleaning process through the sand retaining plate 6 (two pieces, including 61 and 62);

[0062] S5, repeating the cleaning processes of S3 and S4 for the pickled quartz sand introduced onto the next stage acceleration plate 31 until the cleanliness of the pickled quartz sand meets the requirements;

[0063] S6, the pickled quartz sand after the cleaning process of S5 finally flows into the quartz sand dehydration barrel 72 through the sand outlet pipe 71 of the sand outlet device 7, the vacuum unit of the vacuum device 74 is turned on, and the quartz sand dehydration barrel 72 is vacuumed through the buffer tank. Under the vacuum effect, the residual cleaning water in the pickled quartz sand passes through the suction filter bag and the filter plate with holes, the suction filter pipe and the vacuum connecting pipe 75, and enters the buffer tank, so that the cleaning water content in the pickled quartz sand after cleaning meets the requirements of the drying process. Thus, the cleaning and dehydration process of the pickled quartz sand is completed.

[0064] Embodiment 1:

[0065] The examples will demonstrate the cleaning effect of the pickled quartz sand cleaning technology and device of the present invention on the pickled quartz sand, but the present invention is not limited thereto.

[0066] Processing and manufacturing of pickling quartz sand cleaning equipment.

[0067] First, let's consider the production of the cleaning box 1. In order to minimize the pollution of the pickled quartz sand by the cleaning process, this embodiment uses a plastic plate with a thickness of 10mm-20mm to make the cleaning box 1. As a preferred solution, this embodiment uses a 15mm thick PP plate to make the cleaning box 1, because even if a small amount of powder is produced by the friction between the quartz sand and the PP plastic during the cleaning process, these PP plastic powders will be thrown away from the pickled quartz sand and enter the water outlet device along with the high-speed water flow. On the other hand, when the pickled quartz sand is dried, a very small amount of PP plastic powder remaining in the pickled quartz sand will be Under the action of high temperature, gasification and removal occur, thereby completely eliminating the pollution of PP plastic to pickled quartz sand; in addition, the size of the cleaning box 1 directly affects the cleaning effect of the pickled quartz sand, because the height of the cleaning box 1 determines how many levels of cleaning processes can be implemented in the cleaning box 1. This embodiment chooses to make a cleaning box 1 with a length of 1500mm-4000mm, a width of 600mm-2000mm, and a height of 4000mm-8000mm. As a preferred solution, the cleaning box 1 made in this embodiment is 3000mm long, 1000mm wide, and 6000mm high.

[0068] Next, consider the production of the feeding device 2. According to the size of the discharge port 22 on the pickling equipment, a feeding port 21 of the same specification is set on the top plate of the cleaning box 1, and the feeding port 21 is made of PP plastic pipe; the feeding port 21 is connected to the discharge port 22 of the pickling equipment by a feeding hose 23, and the feeding hose 23 is made of plastic hose or silicone hose.

[0069] Third, consider the production of the speed regulating plate device 3. The speed regulating plate device 3 is composed of an accelerator plate 31, a buffer plate 32, and a flat throwing plate 33. The left and right sides of the accelerator plate 31, the buffer plate 32, and the flat throwing plate 33 are all connected to the side walls of the cleaning box 1. The upper edge of the accelerator plate 31 is connected to the top plate of the cleaning box 1, and the lower edge is connected to the buffer plate 32. The lower edge of the buffer plate 32 is further connected to the flat throwing plate 33. The accelerator plate 31 is set below the feed port 21 of the cleaning box 1 and has a larger inclination angle. The buffer plate 32 has a smaller inclination angle than the accelerator plate 31, and the flat throwing plate 33 is set horizontally. In this embodiment, In the embodiment, the acceleration plate 31 is made of a PP plastic plate with a length of 800mm-2000mm, a width of 600mm-2000mm, and a thickness of 8mm-20mm. The inclination angle of the acceleration plate 31 is 30°-60°. As a preferred embodiment, the present invention uses a PP plastic plate with a length of 1200mm, a width of 1000mm, and a thickness of 12mm to make the acceleration plate 31. The inclination angle of the acceleration plate 31 is 40°. The diverter baffle arranged on the first-stage acceleration plate 31 is generally composed of two plastic plates intersecting at an obtuse angle ( Figure 2), the intersecting tip faces the upper end of the acceleration plate 31, and the position is 50mm below the lowest end of the projection of the feed port 21 on the acceleration plate 31. The angle between the two plastic plates is 160°, but in the specific production, the two plastic plates are not continuous as a whole. Each plastic plate is composed of a number of PP plastic small plates with a length of 80mm, a height of 50mm, and a thickness of 20mm, and each plastic small plate is 20mm apart. The diverter baffle set and manufactured in this way is mainly to quickly disperse the pickled quartz sand to the entire acceleration plate 31 under the action of the spray water flow; the buffer plate 32 is selected to be 600mm-2000mm long and 600mm wide -2000mm, 8mm-20mm thick PP plastic plate, the inclination angle of the buffer plate 32 is 10°-30°. As a preferred solution, the present invention uses a PP plastic plate with a length of 1200mm, a width of 1000mm, and a thickness of 12mm to make the buffer plate 32, and the inclination angle of the buffer plate 32 is 10°; the flat-polished plate 33 is made of a PP plastic plate with a length of 80mm-200mm, a width of 600mm-2000mm, and a thickness of 8mm-20mm. As a preferred solution, the present invention uses a PP plastic plate with a length of 100mm, a width of 1000mm, and a thickness of 12mm to make the buffer plate 33, and the buffer plate 33 is horizontally arranged.

[0070] Fourth, consider the production of the spray device 4. The spray device 4 consists of a spray pipe 41, a connecting water pipe 42, and a high-pressure water source 43; the spray pipe 41 is horizontally arranged above the acceleration plate 31 and at the top plate of the cleaning box 1 close to the feed pipe 21, and the two ends are fixed to the two side walls of the cleaning box 1, so that the pickled quartz sand begins to be washed and dispersed by the spray water during the falling process. In this embodiment, a PP plastic pipe with a diameter of 25mm-50mm is selected to make the spray pipe 41. As a preferred solution, the present invention selects a PP plastic pipe with a diameter of 40mm to make the spray pipe 41. A horizontal spray hole is set on the spray pipe 41, and the diameter of the spray hole is 2mm; the connecting water pipe 42 connects the spray pipe 41 with the high-pressure water source 43. In this embodiment, a PP plastic pipe with a diameter of 40mm is selected to make the spray pipe 41. The connecting water pipe 42 is made of a PP plastic pipe; the high-pressure water source 43 includes a water tank 431 with a valve, a water pump 432, a water inlet hose 433, and a water outlet hose 434. The water tank 431 with a valve is a 5m3-10m3 PE water tank. As a preferred embodiment, the water tank 431 with a valve of the present invention is a 10m3 PE water tank, the water pump 432 is a polytetrafluoroethylene lined water pump, the water inlet hose 433 and the water outlet hose 434 are plastic hoses with matching specifications and steel wire reinforcement ribs, the water inlet hose 433 connects the water tank 431 with a valve and the water inlet of the water pump 432, and the water outlet hose 434 connects the water outlet of the water pump 432 and the connecting water pipe 42.

[0071] Fifth, consider the production of the water outlet device 5. The water outlet device 5 includes a water receiving plate 51, a water guide plate 52, a water outlet pipe 53, a waste water tank 54 with a valve, and a waste water hose 55; the water receiving plate 51 is inclined at a small angle to the water guide plate 52 (consistent with the inclination direction of the acceleration plate 31), and the two sides are connected to the side walls of the cleaning box 1, and the position is lower than the flat throwing plate 33, and the cleaning waste water thrown out by the flat throwing plate 33 is received. In this embodiment, the water receiving plate 51 is made of a PP plastic plate with a length of 100mm-600mm, a width of 600mm-2000mm, and a thickness of 8mm-20mm. The inclination angle of the water receiving plate 51 is 5°-20°, and the position is 100mm-500mm lower than the flat throwing plate 33. As a preferred solution, the present invention uses a PP plastic plate with a length of 300mm, a width of 1000mm, and a thickness of 12mm to make the water receiving plate 51. The water plate 51 has an inclination angle of 5° and is 350mm lower than the flat plate 33; the water guide plate 52 is upright, and the upper end is connected to the bottom end of the water receiving plate 51. In this embodiment, the water guide plate 52 is made of a plastic plate with a height of 150mm-2000mm, a width of 1000mm, and a thickness of 12mm. The water guide plate 52 guides the cleaning waste water to flow to the outlet pipe 53 at the bottom of the cleaning box 1; the outlet pipe 53 is made of a PP plastic pipe with a diameter of 125mm; the wastewater tank 54 with a valve is a 5m3-10m3 PE water storage tank. As a preferred embodiment, the wastewater tank 54 with a valve of the present invention is a 10m3 PE water tank; the wastewater hose 55 is a hose made of plastic material, and the wastewater hose 55 connects the wastewater tank 54 with a valve and the outlet pipe 53.

[0072] Sixth, consider the production of the sand baffle 6. The sand baffle 6 is composed of two upright baffles, with two sides connected to the side walls of the cleaning box 1. The upper end of one sand baffle 61 is connected to the lower edge of the flat polishing plate 33, and the upper end of the other sand baffle 62 is connected to the upper edge of the water receiving plate 51, and the lower end is connected to the accelerator plate 31 of the next-level speed regulating plate device 3. At the same time, the spray hole of the next-level spray pipe 41 passes through the upper part of the sand baffle 62, so that when the pickled quartz sand guided by the sand baffle 6 enters the next-level cleaning process, the cleaning water can pass through the sand baffle 62 to rinse the pickled quartz sand entering the next-level cleaning process; in this embodiment, the sand baffle 6 whose upper end is connected to the lower edge of the flat polishing plate 33 1 is made of a PP plastic plate with a height of 500mm, a width of 1000mm and a thickness of 12mm; the other sand retaining plate 62, whose upper end is connected to the upper edge of the water receiving plate 51 and whose lower end is connected to the upper edge of the next-stage acceleration plate 31, is made of a PP plastic plate with a height of about 210mm, a width of 1000mm and a thickness of 12mm. The spray hole of the next-stage spray pipe 41 passes through the upper part of the sand retaining plate 62, about 40mm away from the upper edge; the gap between the sand retaining plates 61 and 62 is 150mm-400mm. As a preferred solution, the present invention selects 250mm as the gap between the two sand retaining plates 61 and 62.

[0073] Seventh, consider how many levels of cleaning process are needed. After completing the production of the above-mentioned speed regulating plate device 3, spray device 4, water outlet device 5 and sand retaining plate 6, it is necessary to consider how many levels of cleaning process are needed according to the requirements for the cleanliness of the pickled quartz sand; the present invention mainly determines whether the cleanliness of the pickled quartz sand after cleaning meets the requirements by detecting the pH value of the last cleaning wastewater and the content of metal element impurities in the cleaning wastewater; this embodiment selects a 3-level to 8-level cleaning process as a preferred solution. In this embodiment, a 6-level cleaning process is selected, that is, 6 sets of matching speed regulating plate devices 3, spray devices 4, water receiving plates 51 and water guide plates 52, sand retaining plates 61 and 62 in the water outlet device 5 are made in the cleaning box 1, among which only the diverter baffle is made on the acceleration plate 31 of the first-level speed regulating plate device 3, and no diverter baffle is set on the remaining 5 sets of speed regulating plate devices 3.

[0074] Eighth, consider the production of the sand discharge device 7. The sand discharge device 7 includes a sand discharge pipe 71, a quartz sand dewatering bucket 72, a sand discharge hose 73, a vacuum device 74, and a vacuum connecting pipe 75. The sand discharge pipe 71 is arranged at the bottom of the cleaning box 1, at the center of the rectangular space surrounded by the last-stage sand retaining plate 6 (two pieces, 61 and 62) and the two side walls of the cleaning box 1. A PP plastic pipe with a diameter of 160 mm is selected to make the sand discharge pipe 71. In order to prevent the pickled quartz sand from remaining at the bottom of the cleaning box 1, the rectangular area where the sand discharge pipe 71 is located is made into a rectangular cone bottom in this embodiment, and the sand discharge pipe is located at the center of the rectangular cone bottom. The quartz sand dewatering barrel 72 is a cylindrical body, which is made entirely of PP plastic plates. The quartz sand dewatering barrel 72 consists of a cover plate, a filter barrel body, and a filter bag. A sand inlet pipe is arranged on the cover plate, and the sand inlet pipe is made of a PP plastic plate with a diameter of 160 mm. A filter plate with holes is arranged at the bottom of the filter barrel, and the filter plate is made of a 20 mm thick plastic plate. The filter plate is used to support the filter bag on one hand, and to isolate a filter space for air extraction and dehydration at the bottom of the filter barrel on the other hand. A filter pipe is arranged on the side wall of the filter space, and the filter pipe is made of a PP plastic pipe with a diameter of 65 mm. The sand outlet hose 73 is a plastic hose, and the sand outlet hose 73 connects the sand outlet pipe 71 and the sand inlet pipe on the cover plate of the quartz sand dewatering barrel 72. The vacuum device 74 consists of a buffer tank and a vacuum unit, and the vacuum unit uses a water jet vacuum pump unit, and the vacuum unit is connected to the buffer tank as a whole. The vacuum connecting pipe 75 is made of a PP plastic pipe with a diameter of 65, and the vacuum connecting pipe 75 connects the suction pipe at the bottom of the quartz sand dehydration barrel 72 and the buffer tank of the vacuum device 74.

[0075] An inspection port 8 is provided at the lower portion of the cleaning box 1 for performing maintenance on the cleaning box 1 .

[0076] The supporting platform 9 is made of carbon steel and consists of a platform and supporting feet. The supporting feet are arranged under the steel platform, and the cleaning box 1 and the high-pressure water source 43 of the spray device 4 are placed on the platform.

[0077] After completing the processing and manufacturing of the above-mentioned pickled quartz sand cleaning device, the specific operation of this embodiment begins.

[0078] First, the prepared 18 megohm ultrapure water is introduced into the water storage tank 431 with a valve in the high-pressure water source 43 of the spray device 4, the valve is opened, and the water pump 432 is started, so that the ultrapure water is sprayed onto the acceleration plate 31 of the speed regulating plate device 3 through the spray holes on the spray pipe 41;

[0079] Then, the pickled quartz sand is introduced into the acceleration plate 31 of the speed regulating plate device 3 in the cleaning box 1 through the feeding device 2;

[0080] The pickled quartz sand falling on the acceleration plate 31 is washed by the first-stage spray water flow. Under the action of the cleaning water flow, the pickled quartz sand is dispersed along the diverter baffle on the acceleration plate 31, and continuously passes through the gap on the diverter baffle, rolling and accelerating to the buffer plate 32; since the inclination angle of the buffer plate 32 is smaller than that of the acceleration plate 31, after reaching the buffer plate 32, the speed of the pickled quartz sand decreases, while the speed of the flushing water flow further increases, and the speed difference between the pickled quartz sand and the flushing water flow further expands, resulting in the cleaning water around the flowing quartz sand being continuously replaced by the subsequent clean water flow, thereby achieving the purpose of rapid cleaning;

[0081] When the high-speed water flow carries the low-speed pickled quartz sand to the flat-throwing plate 33, the high-speed water flow is flat-thrown under the action of inertia, and jumps over the gap between the flat-throwing plate 33 and the water receiving plate 51, and directly falls on the water receiving plate 51 of the water outlet device 5, and under the guidance of the water guide plate 52, flows into the waste water tank 54 with a valve through the water outlet pipe 53. At this point, most of the cleaning wastewater is separated from the cleaned pickled quartz sand; and the low-speed pickled quartz sand falls into the gap between the flat-throwing plate 33 and the water receiving plate 51 under the action of gravity, and is guided into the second-level cleaning process through the sand retaining plate 6 (two pieces, including 61 and 62);

[0082] The pickled quartz sand introduced onto the second stage acceleration plate 31 will be rinsed with the second stage cleaning water, and the cleaning waste water will be thrown away, and the cleaned pickled quartz sand will fall onto the third stage acceleration plate 31; in this embodiment, the pickled quartz sand will undergo 6 such cleaning processes;

[0083] After the sixth stage of cleaning, the pickled quartz sand does not fall onto the next stage acceleration plate 31, but falls into the sand outlet device 7, flows into the quartz sand dehydration barrel 72 through the sand outlet pipe 71, turns on the vacuum unit of the vacuum device 74, and evacuates the quartz sand dehydration barrel 72 through the buffer tank. Under the action of vacuum, the residual cleaning water in the pickled quartz sand passes through the suction filter bag and the filter plate with holes, through the suction filter pipe and the vacuum connecting pipe 75, and enters the buffer tank, so that the cleaning water content in the pickled quartz sand after cleaning meets the requirements of the drying process.

[0084] At this point, the cleaning and dehydration process of the pickled quartz sand is completed.

[0085] By sampling and testing the residual cleaning water in the finally obtained pickled quartz sand, after the 6-stage cleaning process of this embodiment, the pH of the residual cleaning water in the pickled quartz sand is about 5.5, and the total amount of metal element impurities in the cleaning water is at the ppb level, which fully meets the cleanliness requirements of the pickled quartz sand.

[0086] Embodiment 2:

[0087] The same cleaning technology as that in Example 1 is adopted, and the various parameters of the pickled quartz sand to be cleaned are also the same as those in Example 1. The difference from Example 1 is that the cleaning process of the pickled quartz sand is reduced from 6 times to 4 times, and the height of the cleaning box 1 is correspondingly reduced to 4000mm. Only 4 sets of matching speed regulating plate devices 3, spray devices 4, water receiving plates 51 and water guide plates 52 in the water outlet device 5, and sand retaining plates need to be made in the cleaning box 1.

[0088] The same operating process as in Example 1 is adopted, the pickled quartz sand is introduced into the first-stage acceleration plate 31 in the cleaning box 1 through the feeding device 2, and the pickled quartz sand is subjected to four cleaning processes using a spray water flow. The residual cleaning water in the finally obtained cleaned pickled quartz sand is sampled and tested. The pH of the residual cleaning water in the finished pickled quartz sand is about 4, and the total amount of metal element impurities in the cleaning water is about 1 ppm. The cleaning effect is obviously worse than that in Example 1.

[0089] The present invention utilizes spraying water flow to drive the pickled quartz sand to roll and move on the speed regulating plate device, thereby eliminating the adhesion between the quartz particles and between the quartz particles and the vessel, so that the quartz particles are always moved in the flowing cleaning water, and utilizes the flow speed difference between the water flow and the quartz sand. On the one hand, the medium around the quartz particles is continuously replaced by the subsequent clean cleaning water to achieve the cleaning purpose, and on the other hand, most of the cleaning water can be separated from the quartz sand. Moreover, under the vacuum action of the sand discharge device, the water content of the cleaned pickled quartz sand can be further reduced to the requirement of the drying process.

[0090] The present invention provides a cleaning device and a cleaning method for pickled quartz sand, wherein the pickled quartz sand is driven to roll and move on an inclined speed regulating plate device by a cleaning water flow, and a certain speed difference is generated between the cleaning water flow and the pickled quartz sand, so that the cleaning water around the pickled quartz sand is continuously replaced by subsequent clean cleaning water, thereby achieving fast and efficient cleaning of the pickled quartz sand; at the same time, the speed difference between the cleaning water flow and the pickled quartz sand can also separate most of the cleaning water from the pickled quartz sand, and further dehydrating the pickled quartz sand through a vacuum device can make the residual cleaning water (water content) of the pickled quartz sand meet the requirements of the drying process. The present invention avoids possible contamination of the pickled quartz sand during the cleaning process, can perfectly clean the pickled quartz sand without dead ends, and the water content of the pickled quartz sand can meet the requirements of the drying process.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pickled quartz sand cleaning device, characterized in that: It comprises a cleaning box (1), a feeding device (2), a speed regulating plate device (3), a spraying device (4), a water outlet device (5), a sand retaining plate (6), a sand outlet device (7), an inspection port (8), and a supporting platform (9); The feeding device (2) is composed of a feeding port (21) arranged at the top edge of the cleaning box (1), a pickling equipment outlet (22) and a feeding hose (23), and the feeding port (21) is connected to the pickling equipment outlet (22) through the feeding hose (23); The speed regulating plate device (3) is composed of an acceleration plate (31), a buffer plate (32) and a flat throwing plate (33); the left and right sides of the acceleration plate (31), the buffer plate (32) and the flat throwing plate (33) are connected to the side walls of the cleaning box (1); the upper edge of the acceleration plate (31) is connected to the top plate of the cleaning box (1), and the lower edge is connected to the buffer plate (32); the lower edge of the buffer plate (32) is further connected to the flat throwing plate (33); the acceleration plate (31) is arranged below the feed port (21); The spray device (4) is composed of a spray pipe (41), a connecting water pipe (42), and a high-pressure water source (43). The spray pipe (41) is horizontally arranged above the acceleration plate (31), and its two ends are fixed to the two side walls of the cleaning box (1). The connecting water pipe (42) connects the spray pipe (41) and the high-pressure water source (43). The high-pressure water source (43) includes a water storage tank (431) with a valve, a water pump (432), a water inlet hose (433), and a water outlet hose (434). The water inlet hose (433) connects the water storage tank (431) with a valve and the water inlet of the water pump (432), and the water outlet hose (434) connects the water outlet of the water pump (432) and the connecting water pipe (42); The water outlet device (5) comprises a water receiving plate (51), a water guide plate (52), a water outlet pipe (53), a waste water tank (54) with a valve and a waste water hose (55). The water receiving plate (51) is inclined at a small angle toward the water guide plate (52), and two sides are connected to the side walls of the cleaning box (1). The position is lower than the flat throwing plate (33) and receives the cleaning waste water thrown out by the flat throwing plate (33). The water guide plate (52) is arranged upright, and the upper end is connected to the bottom end of the water receiving plate (51) to guide the cleaning waste water to flow to the water outlet pipe (53) at the bottom of the cleaning box (1). The waste water tank (54) with a valve is connected to the water outlet pipe (53) through the waste water hose (55); The sand retaining plates (6) are two upright retaining plates, both sides of which are connected to the side walls of the cleaning box (1); the upper end of one sand retaining plate (61) is connected to the lower edge of the flat throwing plate (33); the upper end of the other sand retaining plate (62) is connected to the upper edge of the water receiving plate (51), and the lower end is connected to the acceleration plate (31) of the speed regulating plate device (3) of the next stage; and the spray hole of the spray pipe (41) of the next stage passes through the upper part of the other sand retaining plate (62); The sand discharge device (7) comprises a sand discharge pipe (71), a quartz sand dewatering bucket (72), a sand discharge hose (73), a vacuum device (74) and a vacuum connecting pipe (75). The sand discharge pipe (71) is arranged at the bottom of the cleaning box (1), at the center of a rectangular space surrounded by the last-stage sand retaining plate (6) and two side walls of the cleaning box (1). The quartz sand dewatering bucket (72) is composed of a cover plate, a filter bucket and a filter bag. A sand inlet pipe is arranged on the cover plate. The lower part of the filter bucket is supported by a filter plate with holes. The suction filter bag forms a suction and dehydration suction filter space between the suction filter bag and the bottom of the suction filter barrel, a suction filter pipe is arranged on the side wall of the suction filter space, the sand outlet hose (73) connects the sand outlet pipe (71) and the sand inlet pipe on the cover plate of the quartz sand dehydration barrel (72), the vacuum device (74) is composed of a buffer tank and a vacuum unit, the vacuum unit and the buffer tank are connected to form a whole, and the vacuum connecting pipe (75) connects the suction filter pipe at the bottom of the quartz sand dehydration barrel (72) and the buffer tank; The supporting platform (8) is provided with supporting feet under the platform, and the cleaning box (1) and the high-pressure water source (43) of the spraying device (4) are placed on the platform; The inspection port (9) is arranged at the lower part of the cleaning box (1).

2. The pickled quartz sand cleaning device according to claim 1, characterized in that: The acceleration plate (31) has a relatively large inclination angle, the buffer plate (32) has a smaller inclination angle than the acceleration plate (31), and the flat throwing plate (33) is arranged horizontally.

3. The pickled quartz sand cleaning device according to claim 2, characterized in that: The acceleration plate (31) is provided with a flow dividing baffle.

4. The pickled quartz sand cleaning device according to claim 3, characterized in that: The spray pipe (41) is provided with horizontal spray holes.

5. The pickled quartz sand cleaning device according to claim 4, characterized in that: The water receiving plate (51) and the acceleration plate (31) have the same inclination direction.

6. The pickled quartz sand cleaning device according to claim 5, characterized in that: The cleaning box (1) is a closed box in the shape of a rectangular parallelepiped.

7. A method for cleaning pickled quartz sand, using the pickled quartz sand cleaning device according to any one of claims 1 to 6, characterized in that: The steps include: S1, introducing ultrapure water into a water storage tank (431) with a valve in a high-pressure water source (43) of a spray device (4), opening the valve, starting a water pump (432), and spraying the ultrapure water onto an acceleration plate (31) of a speed regulating plate device (3) through a spray hole on a spray pipe (41); S2, introducing the pickled quartz sand through the feeding device (2) onto the acceleration plate (31) of the speed regulating plate device (3) in the cleaning box (1); S3, the pickled quartz sand falling on the acceleration plate (31) is continuously rolled and accelerated to move toward the buffer plate (32) under the flushing of the spray water flow; The angle of the buffer plate (32) is lower than that of the acceleration plate (31). After reaching the buffer plate (32), the speed of the pickled quartz sand decreases, while the speed of the flushing water flow increases further. The speed difference between the pickled quartz sand and the flushing water flow further increases, resulting in the cleaning water around the flowing quartz sand being continuously replaced by the subsequent clean water flow, so that the cleaning is carried out quickly. S4, when the high-speed water flow carries the low-speed pickled quartz sand to the flat-throwing plate (33), the high-speed water flow is flat-thrown under the action of inertia, and is thrown over the gap between the flat-throwing plate (33) and the water receiving plate (51), and directly falls on the water receiving plate (51) of the water outlet device (5), and under the guidance of the water guide plate (52), flows into the waste water tank (54) with a valve through the water outlet pipe (53), so that most of the cleaning waste water is separated from the cleaned pickled quartz sand; while the low-speed pickled quartz sand falls into the gap between the flat-throwing plate (33) and the water receiving plate (51) under the action of gravity, and is guided by the sand retaining plate (6) to enter the next level of cleaning process; S5, repeating the cleaning processes of S3 and S4 for the pickled quartz sand introduced onto the next stage acceleration plate (31) until the cleanliness of the pickled quartz sand meets the requirements; S6, the pickled quartz sand that has undergone the cleaning process in S5 finally flows into the quartz sand dewatering barrel (72) through the sand outlet pipe (71) of the sand outlet device (7), the vacuum unit of the vacuum device (74) is turned on, and the quartz sand dewatering barrel (72) is evacuated through the buffer tank. Under the action of the vacuum, the residual cleaning water in the pickled quartz sand passes through the suction filter bag and the perforated filter plate, the suction filter pipe and the vacuum connecting pipe (75), and enters the buffer tank, so that the cleaning water content in the pickled quartz sand after cleaning meets the requirements of the drying process, and the cleaning is completed.

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