CN117680276A - Frame-type high-efficiency sand washing, dehydration and recovery system and control method - Google Patents

Abstract

The invention belongs to the technical field of fine sand equipment, and relates to a frame type efficient sand washing, dewatering and recycling system and a control method. The invention relates to a frame type efficient sand washing, dewatering and recycling system which comprises a feeding module, a water washing and screening module, a transfer slurry supply module, a rotational flow sand washing module and a sand washing and dewatering module. The water washing and screening module and the sand washing and dewatering module both adopt the water washing process, fine sand is recovered from the slurry after vibration dewatering, the loss of fine sand is reduced, and the overall sand yield is improved. The invention can recycle the washed slurry, and the design of the multi-channel water tank can ensure the uniformity of the feeding concentration of the follow-up cyclone sand washing module. The frame type efficient sand washing, dewatering and recycling system adopts a frame type structure to be integrated in the frame, so that the occupied area of equipment is reduced.

Description

Frame-type high-efficiency sand washing, dehydration and recovery system and control method

Technical field

The invention belongs to the technical field of fine sand equipment and relates to a frame-type high-efficiency sand washing, dehydration and recovery system and a control method.

Background technique

At present, in the building materials, mining, metal, mining, road construction, slag disposal and other industries, there are a large number of raw materials and reusable waste materials that need to be processed by sand washing equipment. Sand washing equipment is used to remove the dust covering the surface of sand and gravel. Mud or other impurities are removed, and the water vapor layer surrounding the sand is destroyed to achieve dehydration to meet the requirements of use. Depending on the mud content of the raw materials, multiple water washing equipment are often required. In order to solve the above problems, the invention patent with patent number 202110928576.4 discloses a digital sand washing and recycling workstation, including a spiral dewatering screen, a wheel dewatering screen, a high-frequency vibration dewatering screen and a belt scale arranged in series. The equipment is arranged in series, and each equipment is installed separately. Multiple supporting foundations need to be positioned in advance for the positioning of the equipment legs before entering the site. The area is large, the use cost is high, and material transmission channels are required between multiple types of equipment. The construction requires positioning and installation on site, which requires workers to have high technical requirements for installation. Once the installation deviation is too large, water overflow, material leakage, low sand recovery efficiency, etc. will occur during the work process, polluting the on-site working environment.

Contents of the invention

In order to overcome the deficiencies in the prior art, the present invention provides a frame-type high-efficiency sand washing, dehydration and recovery system. To achieve the above objectives, the technical solutions adopted by the present invention are as follows:

The frame-type high-efficiency sand washing and dewatering recovery system is characterized by: including a feeding module, a water washing and screening module, a transfer slurry supply module, a cyclone sand washing module, and a sand washing and dewatering module;

The feeding module is connected to the water washing screen module;

The water washing screen module includes a screening mechanism, a first spray device, and a first frame body. The screening mechanism is provided with a feed port on one side and a discharge port on the other side. The screening mechanism is equipped with multiple There is a slurry collection tank at the bottom of the screening mechanism, and the first spray device is set above the multi-layer screen to spray the aggregate falling into the multi-layer screen with high pressure;

The transfer slurry supply module includes a transfer water tank, which is connected with the slurry collection tank and is used to cache the mud collected in the slurry collection tank;

The cyclone sand washing module includes a cyclone and a slurry pump. The cyclone includes a liquid inlet, an overflow end, and an underflow end. The liquid inlet is connected to the slurry pump. The cyclone in the transfer water tank After the mud reaches a certain height, it is pumped by the slurry pump to the cyclone for classification;

The sand washing and dehydration module includes a dewatering screen and a second flushing device. The dewatering screen is provided with a fine sand screen plate, and a dehydration collection tank is provided at the bottom of the dehydration screen. The dehydration collection tank is connected with the transfer water tank. The second flushing device Set above the fine sand screen.

Further, the feeding module includes a heavy-duty screen, a chain plate feeder, a feeding conveyor, and an outer support frame. The heavy-duty screen is connected to the chain plate feeder, and the feeding conveyor is connected to the screening mechanism. , used to transport aggregate to the screening mechanism, and the outer support frame supports at least one section of the feed conveyor above the screening mechanism.

Furthermore, the screening mechanism is a three-axis elliptical screen, and the water washing screen module also includes a material guide device, and the material guide device is connected to the discharge port.

Furthermore, the slurry collection tank has a conical structure with constrictions on all sides, and a mud outlet is provided at the bottom of the slurry collection tank to communicate with the transfer water tank.

Furthermore, the water washing screen module also includes a first frame body. The screening mechanism is supported at a high position by the first frame body frame, and an installation space for the feeding module is left at a low position.

Further, the transfer slurry supply module also includes an automatic water replenishment device. The automatic water replenishment device includes a liquid level detector, a water replenishment pipe, and a water replenishment valve. The liquid level detector is used to detect the liquid level in the transfer water tank. The water replenishment pipe One end is connected to the overflow end of the cyclone, and the other end is connected to the transfer water tank. The water replenishment valve is arranged on the water replenishment pipe and is connected to the signal of the liquid level detector.

Furthermore, the cyclone sand washing mold also includes a second frame body, which supports the cyclone at a high point of the sand washing and dehydration module, and leaves a space for accommodating the dewatering screen at a low point.

Further, the sand washing and dewatering module also includes a third frame body, which supports the dehydration screen at a high place, and the second frame body is provided on the third frame body.

The control method of the frame-type high-efficiency sand washing, dehydration and recovery system uses the above-mentioned high-efficiency sand washing, dehydration and recovery system. The specific steps are as follows:

The feeding module screens out the excess material in the aggregate and sends the aggregate under the screen to the screening mechanism;

The aggregate enters the screening mechanism and falls into the multi-layer screen of the screening mechanism. The first spray device performs high-pressure spray on the aggregate falling on the multi-layer screen. The multi-layer screen screens out the aggregate. Particles of different particle sizes, particles smaller than the aperture of the bottom screen mesh, are mixed with the spray water flow and washed mud to form mud, and fall into the slurry collection tank together;

After the mud in the transfer tank reaches a certain height, it is pumped by the slurry pump to the cyclone for classification. The mud is separated from the sand inside the cyclone. Most of the water and mud particles flow out through the overflow end at the top of the cyclone. The bottom flow end of the cyclone pours relatively clean sand onto the fine sand screen plate of the dewatering screen;

The dewatering screen works, and the second flushing device flushes the sand twice. After being screened by the fine sand sieve plate, clean low-moisture content aggregates are finally obtained. The mixed slurry under the fine sand sieve plate is collected in the dehydration collection tank. , flows into the transfer tank along the pipeline by its own weight.

Furthermore, when the liquid level of the intermediate transfer tank is lower than the set minimum height, the water replenishment valve automatically opens, and the overflow water from the overflow end of the top of the cyclone flows into the transfer tank for emergency temporary water replenishment. The liquid level of the intermediate transfer tank rises to When the liquid level is above the minimum level, the water replenishment valve will be closed again, and the overflow water from the top of the cyclone will be discharged into the sewage pool normally.

The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention adopts the water washing process of the whole line of sand washing equipment in the water washing screen module and the sand washing and dehydration module, and recovers fine sand from the slurry after vibration and dehydration, reducing the fine sand loss and increase overall sand production. The invention is designed with a slurry collection tank, a transfer tank, and a dehydration collection tank, which can recycle the slurry after sand washing. At the same time, the design of multiple water tanks can ensure the uniformity of the feed concentration of the subsequent cyclone sand washing module. In addition, the invention The transfer pulp supply module is also equipped with an automatic water replenishment device, which can control the direction of the cyclone overflow according to the liquid level in the transfer tank to achieve the effect of temporary water replenishment. The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention integrates screening and feeding, water washing and screening, mud transfer, cyclonic sand washing, vibration dehydration and fine sand recovery. It adopts a frame-type structure to combine the feeding module, water washing and dewatering. The screen module, transfer slurry supply module, cyclone sand washing module, and sand washing and dewatering module are integrated in the frame, reducing the equipment footprint, minimizing the on-site installation period, and simplifying the difficulty of hoisting the equipment. The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention can be fully assembled and debugged in the factory in advance, thus avoiding the tedious debugging stage during on-site installation and reducing debugging time.

Description of the drawings

Figure 1 is a schematic structural diagram of a frame-type high-efficiency sand washing, dehydration and recovery system;

Figure 2 is a schematic structural diagram of the feed module of the frame-type high-efficiency sand washing, dehydration and recovery system;

Figure 3 is the front view of the frame-type high-efficiency sand washing, dehydration and recovery system;

Figure 4 is a schematic structural diagram of the frame-type high-efficiency sand washing, dehydration and recovery system in operation.

In Figure 1: 1. Feed module, 2. Water washing and screening module, 3. Transfer slurry supply module, 4. Cyclone sand washing module, 5. Sand washing and dehydration module;

In Figure 2: 11. Heavy-duty screen, 12. Chain feeder, 13. Feed conveyor;

In Figure 3-4: 13. Feed conveyor, 14. External support frame, 21. Three-axis elliptical screen, 211 multi-layer screen, 22. First spray device, 23. First frame body, 212. Inlet Material port, 213. Discharge port, 214. Material guide device, 215. Slurry collection tank, 216. Mud outlet, 31. Transfer tank, 32. Automatic water supply device, 321. Liquid level detector, 322. Water supply pipe, 323 , water replenishment valve, 41. cyclone, 42. slurry pump, 43. buffer tank, 44. second frame body, 411. liquid inlet, 412. overflow end, 413. underflow end, 51. dehydration screen, 511. Fine sand screen plate, 512. Dehydration collection tank, 52. Second flushing device, 53. Third frame body.

Detailed ways

The present invention will be further described below through specific embodiments.

Referring to the frame-type high-efficiency sand washing, dehydration and recovery system shown in Figures 1 to 4, it includes a feed module 1, a water washing screen module 2, a transfer slurry supply module 3, a cyclonic sand washing module 4, and a sand washing and dehydration module 5.

The feeding module 1 includes a heavy-duty screen 11, a chain plate feeder 12, a feeding conveyor 13, and an outer support frame 14. The heavy-duty screen 11 is connected to the chain plate feeder 12, and the heavy-duty screen 11 separates the aggregates. The over-limit materials are screened out, and the undersized materials are sent to the feed conveyor 13 through the chain plate feeder 12. The feed conveyor 13 is connected to the feed port of the three-axis elliptical screen 21 and is used to feed the three-axis elliptical screen to the three-axis elliptical screen. The screen 21 transports aggregate, and the outer support frame 14 supports at least one section of the feed conveyor 13 above the three-axis oval screen 21, reducing the overall space occupation.

The water washing screen module 2 includes a screening mechanism of a three-axis elliptical screen 21, a first spray device 22, and a first frame body 23. The three-axis elliptical screen 21 includes a multi-layer screen 211, a feed port 212, an outlet Material port 213, material guide device 214, slurry collection tank 215. One side of the three-axis elliptical screen 21 is provided with a feed port 212, and the other side is provided with a material outlet 213. A multi-layer screen 211 is provided on the three-axis Inside the oval screen 21, the material guide device 214 is connected to the discharge port 213. The slurry collection tank 215 is set at the bottom of the three-axis oval screen 21. The aggregate falls into the multi-layer screen 211 through the feed port 212, and the multi-layer screen 211 will Particles of different sizes screened out from the aggregate are sent out respectively through the material guide device 214. The particles smaller than the aperture of the bottom screen mesh are mixed with the spray water flow and washed mud to form mud, and fall into the slurry collection tank 215 together. The slurry collection tank 215 is a conical structure with constrictions on all sides. The bottom of the slurry collection tank 215 is provided with a mud outlet 216 that is connected to the transfer tank 31. The first spray device 22 is arranged above the multi-layer screen 211 to prevent the liquid from falling into multiple layers. The aggregates on the layer screen 211 are sprayed with high pressure to effectively separate the mud and sand and prevent dust. The three-axis elliptical screen 21 is set up at a high place through the first frame body 23, and the low place is left to accommodate the installation of the transfer water tank 31. space.

The transfer slurry supply module 3 includes a transfer tank 31 and an automatic water replenishing device 32. The transfer tank 31 is connected with the slurry collection tank 215 and is used to cache the mud collected in the slurry collection tank 215. An access door is provided on the transfer tank 31 to facilitate cleaning. The accumulation formed by the natural sedimentation of mud and sand. At the same time, drain holes and gate valves are provided on both sides so that the water in the transfer tank 31 can be completely drained when production is shut down. The corresponding transfer tank 31 is provided with an overflow port to prevent When the liquid exceeds the storage limit of the transfer tank, the slurry overflows from the tank and affects the on-site environment. The automatic water replenishment device 32 includes a liquid level detector 321, a water replenishment pipe 322, and a water replenishment valve 323. The liquid level detector 321 is used to detect The liquid level in the transfer tank 31 is determined by one end of the water supply pipe 322 being connected to the overflow end 412 of the cyclone 41 and the other end being connected to the transfer tank 31. The water supply valve 323 is disposed on the water supply pipe 322 and is connected to the liquid level. Bit detector 321 signal connection.

The mud in the slurry collection tank 215 evenly fills the transfer tank 31, so that the mud concentration in the transfer tank 31 reaches a relatively stable state, so as to facilitate the subsequent work of the slurry pump 42.

When the front-end slurry feed volume decreases and the liquid level of the transfer tank 31 is lower than the set minimum height, the water replenishing valve 323 automatically opens, and the overflow water from the overflow end 412 at the top of the cyclone 41 will flow into the transfer tank along the pipeline. Emergency temporary water replenishment is carried out in 31 to avoid damage caused by air being sucked into the slurry pump. When clean water is replenished or the front-end slurry is normal, the liquid level in the transfer tank 31 rises above the minimum liquid level, the water replenishing valve 323 is re-closed, and the cyclone 41 Top overflow water will be drained into the sump normally.

The cyclone sand washing module 4 includes a cyclone 41, a slurry pump 42, a buffer tank 43, and a second frame body 44. The cyclone 41 includes a liquid inlet 411, an overflow end 412, and an underflow end 413. The liquid inlet 411 is connected to the slurry pump 42. After the mud in the transfer water tank 31 reaches a certain height, it is pumped by the slurry pump 42 to the cyclone 41 for classification. The mud enters through the liquid inlet 411 of the cyclone 41. , under the action of the inlet pressure and gravity, the inside of the cyclone 41 presents a rotating state. During the rotation process, the material and the water flow, the material and the material, and the material and the inner wall collide with each other, thereby achieving the effect of mud and sand separation, and greatly Part of the water and mud particles flow out through the overflow end 412 at the top of the cyclone. This part of the sewage flows along the pipeline to the on-site sewage tank for subsequent sewage treatment. The bottom flow end of the cyclone 41 will collect relatively clean sand and sand. Pour it into the buffer tank 43, and then pour it onto the fine sand screen plate 511 of the dewatering screen 51 after buffering. The slurry pump 42 is connected to the transfer water tank 31 to pump the slurry in the buffer tank 43 to the cyclone 41 , the buffer box 43 is connected to the bottom flow end of the cyclone 41, and the second frame body 44 supports the cyclone 41 at the high point of the sand washing and dehydration module 5, leaving a space for the dewatering screen 51 at the low place.

The sand washing and dehydration module 5 includes a dehydration screen 51, a second flushing device 52, and a third frame body 53. The dehydration screen 51 is provided with a fine sand screen plate 511, and a dehydration collection tank 512 is provided at the bottom of the dehydration screen 51. The collection tank 512 is connected with the transfer tank 31. The second flushing device 52 is arranged above the fine sand screen plate 511. The third frame body 53 supports the dehydration screen 51 at a high place. The preferred third frame body 53 and the first frame body 23 have the same height, and the second frame body 44 is disposed on the third frame body 53 .

When the dewatering screen 51 is working, the fine sand screen plate 511 is tilted upward at a certain angle. The angle design of the screen surface makes the aggregate residence area and time on the screen surface larger, which helps to improve the dehydration effect. The second flushing device 52 cleans the sand. The material is washed twice to prevent the mud and sand not removed by the cyclone 41 from being remixed. After being screened by the fine sand sieve plate 511, clean low-moisture content aggregates are finally obtained. The mixed slurry under the fine sand sieve plate 511 is screened Most of the components in the slurry are relatively pure water, some fine aggregates and a small amount of mud. After this part of the slurry is collected by the dehydration collection tank 512, it flows into the transfer tank 31 by its own weight along the pipeline, and the remaining fine sand is recycled. The transfer water tank 31 is replenished with water.

According to Figures 1-4, the control method of the above-mentioned frame-type high-efficiency sand washing, dehydration and recovery system is as follows:

The heavy-duty screen 11 of the feeding module 1 screens out the excess material in the aggregate, and the undersized materials are sent to the feeding conveyor 13 through the chain plate feeder 12, and the feeding conveyor 13 feeds to the three-axis elliptical screen 21 Conveying aggregates.

The aggregate enters the triaxial oval screen 21 and falls into the multi-layer screen 211 through the feed port 212. The first spray device 22 performs high-pressure spray on the aggregate falling on the multi-layer screen 211, so that the mud and sand can be effectively To separate and prevent dust, the multi-layer screen 211 sieves the particles of different sizes from the aggregate and sends them out separately through the guide device 214. The particles smaller than the aperture of the bottom screen mesh are mixed with the spray water flow and the washed mud to form mud. , and fall into the slurry collection tank 215 together.

The mud in the slurry collection tank 215 evenly fills the transfer tank 31, so that the mud concentration in the transfer tank 31 reaches a relatively stable state, so as to facilitate the subsequent work of the slurry pump 42. The front-end slurry feed amount is reduced, and the transfer tank 31 When the liquid level is lower than the set minimum height, the water replenishment valve 323 automatically opens, and the overflow water from the overflow end 412 at the top of the cyclone 41 will flow into the transfer tank 31 along the pipeline for emergency temporary water replenishment to avoid the slurry pump pumping. Air intrusion causes damage. When clean water is replenished or the front-end slurry is normal and the liquid level in the transfer tank 31 rises above the minimum liquid level, the water replenishment valve 323 is re-closed, and the overflow water from the top of the cyclone 41 will be discharged into the sewage tank normally.

After the mud in the transfer tank 31 reaches a certain height, it is pumped by the slurry pump 42 to the cyclone 41 for classification. The mud enters from the liquid inlet 411 of the cyclone 41. Under the action of the inlet pressure and gravity, it flows in the cyclone. The inside of the cyclone 41 is in a rotating state. During the rotation, the material and the water flow, the material and the material, and the material and the inner wall collide with each other, thereby realizing the separation of mud and sand. Most of the water and mud particles overflow through the top of the cyclone. End 412 flows out, and this part of sewage flows along the pipeline to the on-site sewage pool for subsequent sewage treatment. The bottom flow end of the cyclone 41 pours the relatively clean sand into the buffer box 43, and then pours it into the buffer box 43. On the fine sand screen plate 511 of the dewatering screen 51.

When the dewatering screen 51 is working, the fine sand screen plate 511 is tilted upward at a certain angle. The angle design of the screen surface makes the aggregate residence area and time on the screen surface larger, which helps to improve the dehydration effect. The second flushing device 52 cleans the sand. The material is rinsed twice to prevent the mud and sand not removed by the cyclone 41 from being remixed. After being screened by the fine sand screen plate 511, clean low-moisture-content aggregate is finally obtained.

Most of the components of the mixed slurry under the fine sand screen 511 are relatively pure water, some fine aggregates and a small amount of mud. After being collected by the dehydration collection tank 512, this part of the slurry flows into the transfer tank 31 along the pipeline by its own weight. Within, the remaining fine sand is recovered, and the transfer tank 31 is replenished at the same time.

The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention integrates the entire line of sand washing equipment, including screening and feeding, water washing and screening, mud transfer, cyclonic sand washing, vibration dehydration, and fine sand recovery, and adopts a frame-type The structure integrates the feeding module 1, water washing screen module 2, transfer slurry supply module 3, cyclonic sand washing module 4, and sand washing and dehydration module 5 into the frame, reducing the equipment footprint and minimizing the on-site installation period. , simplifying the difficulty of hoisting the equipment. The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention can be fully assembled and debugged in the factory in advance, thus avoiding the tedious debugging stage during on-site installation and reducing debugging time. The frame-type high-efficiency sand washing, dehydration and recovery system of the present invention adopts the water washing process in both the water washing screen module 2 and the sand washing and dehydration module 5, and recovers fine sand from the slurry after vibration dehydration, reducing the loss of fine sand and improving the overall Sand production volume. In the present invention, a slurry collection tank 215, a transfer tank 31, and a dehydration collection tank 512 are designed to recycle the slurry after sand washing. At the same time, the design of multiple water tanks can ensure the uniformity of the feed concentration of the subsequent cyclonic sand washing module 4. , In addition, the transfer pulp supply module 3 of the present invention is also equipped with an automatic water replenishing device 32, which can control the overflow direction of the cyclone 41 according to the liquid level in the transfer water tank 31 to achieve the effect of temporary water replenishment.

The above are only some specific implementations of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantive changes to the present invention using this concept shall constitute an infringement of the protection scope of the present invention.

Claims (10)

1. Frame-type efficient sand washing dehydration recovery system, its characterized in that: comprises a feeding module, a water washing and screening module, a transit slurry supply module, a rotational flow sand washing module and a sand washing and dewatering module;

the feeding module is connected with the water washing screen module;

the water washing screen module comprises a screening mechanism, a first spraying device and a first frame body, wherein a feed inlet is formed in one side of the screening mechanism, a discharge outlet is formed in the other side of the screening mechanism, a multi-layer screen is arranged in the screening mechanism, a slurry collecting tank is arranged at the bottom of the screening mechanism, and the first spraying device is arranged above the multi-layer screen and is used for spraying aggregate falling onto the multi-layer screen at high pressure;

the transfer slurry supply module comprises a transfer water tank which is communicated with the slurry collecting tank and is used for buffering slurry collected in the slurry collecting tank;

the cyclone sand washing module comprises a cyclone and a slurry pump, wherein the cyclone comprises a liquid inlet, an overflow end and an underflow end, the liquid inlet is connected with the slurry pump, and slurry in the transfer water tank is pumped into the cyclone by the slurry pump for classification after reaching a certain height;

the sand washing and dehydrating module comprises a dehydrating screen and a second flushing device, a fine sand screen plate is arranged in the dehydrating screen, a dehydrating collecting tank is arranged at the bottom of the dehydrating screen, the dehydrating collecting tank is communicated with the middle rotating water tank, and the second flushing device is arranged above the fine sand screen plate.

2. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the feeding module comprises a heavy screen, a chain plate feeder, a feeding conveyor and an outer supporting frame, wherein the heavy screen is connected with the chain plate feeder, the feeding conveyor is connected with the screening mechanism and is used for conveying aggregate to the screening mechanism, and at least one section of the feeding conveyor is supported above the screening mechanism by the outer supporting frame.

3. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the screening mechanism is a triaxial elliptical screen, the washing screen module further comprises a material guiding device, and the material guiding device is connected with the discharge hole.

4. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the slurry collecting tank is of a conical structure with four shrinkage openings, and a slurry outlet is arranged at the bottom of the slurry collecting tank and is communicated with the transit water tank.

5. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the washing screen module further comprises a first frame body, the screening mechanism is supported at a high position by the first frame body frame, and an installation space for accommodating the feeding module is reserved at a low position.

6. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the transfer pulp feed module further comprises an automatic water supplementing device, the automatic water supplementing device comprises a liquid level detector, a water supplementing pipe and a water supplementing valve, the liquid level detector is used for detecting the liquid level in the transfer water tank, one end of the water supplementing pipe is connected with the overflow end of the cyclone, the other end of the water supplementing pipe is connected with the transfer water tank, and the water supplementing valve is arranged on the water supplementing pipe and is in signal connection with the liquid level detector.

7. The frame-type efficient sand washing, dewatering and recycling system according to claim 1, wherein: the cyclone sand washing module further comprises a second frame body, the second frame body supports the cyclone at the high position of the sand washing and dewatering module, and a space for accommodating the dewatering screen is reserved at the low position.

8. The frame-type efficient sand washing, dewatering and recycling system according to claim 7, wherein: the sand washing and dewatering module further comprises a third frame body, the third frame body supports the dewatering screen at a high position, and the second frame body is arranged on the third frame body.

9. A control method of a frame type efficient sand washing, dewatering and recycling system, which uses the efficient sand washing, dewatering and recycling system according to any one of claims 1-8, and comprises the following specific steps:

the feeding module screens out the overrun material in the aggregate and sends the screened aggregate to the screening mechanism;

the aggregate enters a screening mechanism and falls into a multi-layer screen of the screening mechanism, the first spraying device sprays the aggregate falling into the multi-layer screen at high pressure, the multi-layer screen screens out particles with different particle diameters, the particles smaller than the pore diameter of the bottom-layer screen, the sprayed water flow and the flushed mud are mixed into slurry, and the slurry is fallen into a slurry collecting tank;

after the slurry in the transfer water tank reaches a certain height, pumping the slurry into a cyclone by a slurry pump to carry out classification, wherein the slurry is separated into mud and sand in the cyclone, most of water and mud particles flow out through an overflow end at the top of the cyclone, and a cleaner sand material is poured into a fine sand screen plate of a dewatering screen at a underflow end of the cyclone;

the dewatering screen works, the second flushing device carries out secondary flushing on sand materials, clean aggregate with low water content is finally obtained after screening by the fine sand screen plate, and mixed slurry under the fine sand screen plate flows into the transfer water tank along a pipeline by dead weight after being collected by the dewatering collecting tank.

10. The control method of the frame-type efficient sand washing, dewatering and recycling system according to claim 9, wherein when the liquid level of the intermediate water tank is lower than the set minimum height, the water supplementing valve is automatically opened, overflow water at the overflow end of the top of the cyclone flows into the intermediate water tank to carry out emergency temporary water supplementing, when the liquid level of the intermediate water tank is raised to be higher than the minimum liquid level, the water supplementing valve is closed again, and the overflow water at the top of the cyclone is normally discharged into the sewage tank.