Environment-friendly sandstone separation equipment and sandstone separation process thereof

Abstract

The invention discloses environment-friendly sand and stone separation equipment and a sand and stone separation process thereof.The environment-friendly sand and stone separation equipment comprises a first turning and washing mechanism, a second turning and washing mechanism and a sand separation mechanism, the first turning and washing mechanism comprises a first cavity, the second turning and washing mechanism comprises a second cavity, and the first cavity and the second cavity communicate with each other; a feeding groove is formed in the side wall of the first cavity, a water spraying pipe is arranged at the top of the feeding groove, the sand separation mechanism is arranged above a first rotating motor, a water outlet is formed in the side wall of the second cavity, and the water outlet is connected with a slurry-water separation mechanism. According to the feeding device, the separated water is sprayed out through the water spraying pipe so that recycling can be achieved, water resources are greatly saved, meanwhile, sewage discharge is reduced, the feeding device is more environmentally friendly and saves more energy, in addition, when feeding is conducted, earthwork does not need to be hit beside equipment to raise a feeding vehicle, the construction cost is saved, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the field of separation equipment, in particular to environmentally friendly sand and gravel separation equipment and a sand and gravel separation process thereof. Background Art

[0002] Automatic sand and gravel separation equipment is a kind of equipment used in the environmental protection industry to separate sand and gravel from water. In the prior art, the feeding position of the automatic sand and gravel separation equipment is usually set at the top of the shell, which requires the construction of earthwork beside the equipment to raise the height of the sand and gravel transport vehicle, which will increase the construction cost and construction period. In addition, in the current automatic sand and gravel separation equipment, the feeding part needs a lot of water to flush to ensure the fluidity of the entire sand and gravel, but these waters are usually directly discharged after use, which will not only cause a huge waste of water resources, but also pollute the environment when discharging these sewage. Summary of the invention

[0003] In order to solve the above-mentioned problems, the present invention provides an environmentally friendly sand and gravel separation equipment, including a first turning and washing mechanism, a second turning and washing mechanism and a sand separation mechanism, the first turning and washing mechanism includes a first chamber, the second turning and washing mechanism includes a first chamber, the first chamber and the second chamber are connected to each other, a first rotating motor is arranged at one end of the second chamber, a first stirring shaft is connected to the driving end of the first rotating motor, the first stirring shaft passes through the second chamber and the first chamber, a feed trough is arranged on the side wall of the first chamber, a water spray pipe is arranged on the top of the feed trough, the sand separation mechanism is arranged above the first rotating motor, a water outlet is arranged on the side wall of the second chamber, the water outlet is connected to a slurry and water separation mechanism, the slurry and water separation mechanism includes a storage tank and a water storage tank, and the water storage tank is connected to the water spray pipe.

[0004] Furthermore, the cross-sectional area of ​​the first chamber is smaller than the cross-sectional area of ​​the second chamber, and the first stirring shaft is provided with a first stirring component and a second stirring component, respectively. The first stirring component is accommodated in the first chamber, and the second stirring component is accommodated in the second chamber.

[0005] Furthermore, the first stirring assembly includes a plurality of first support rods, which are vertically connected to the first stirring shaft. A first connecting rod is arranged on a side of the first support rod away from the first stirring shaft, and a plurality of first stirring blades are arranged on the first connecting rod.

[0006] Furthermore, there is a first gap between the first stirring blades.

[0007] Furthermore, the second stirring assembly includes a plurality of second support rods, which are vertically connected to the first stirring shaft. A second connecting rod is arranged on a side of the second support rod away from the first stirring shaft, and a plurality of second stirring blades are arranged on the second connecting rod.

[0008] Furthermore, a baffle is provided between the first stirring component and the second stirring component. The baffle is located in the first chamber and is sleeved on the first stirring shaft. A second gap exists between the baffle and the first chamber.

[0009] Furthermore, the sand separation mechanism includes a plurality of hoppers sleeved on the first stirring shaft and a receiving tank arranged in the second chamber, a third chamber is arranged on one side of the receiving tank inclined upward, a second stirring shaft is arranged in the third chamber, and a second rotating motor is connected to the end of the second stirring shaft away from the receiving tank.

[0010] Furthermore, the second stirring shaft includes a first shaft body and a second shaft body, the first shaft body extends into the second chamber, the second shaft body is connected to the second rotating motor, the first shaft body and the second shaft body are connected by a connecting piece, the connecting piece includes a hanging ring and a rotating body coaxially arranged in the hanging ring, the two ends of the rotating body are respectively detachably connected to the first shaft body and the second shaft body, and the hanging ring is suspended in the third chamber by a U-shaped piece.

[0011] Furthermore, the slurry water separation mechanism includes a water storage tank arranged next to the water outlet, a slurry water concentration and sedimentation tank is arranged on one side of the water storage tank, and a water pump is arranged on the top of the slurry water concentration and sedimentation tank. The water pump draws the slurry water in the water storage tank from the top into the slurry water concentration and sedimentation tank for concentration and sedimentation. The material storage tank and the water storage tank are respectively arranged on both sides of the slurry water concentration and sedimentation tank, the material storage tank is connected to the bottom end of the slurry water concentration and sedimentation tank, and the water storage tank is connected to the top end of the slurry water concentration and sedimentation tank.

[0012] The present application also provides a sand and gravel separation process, including the following features: step 1, the mixture mixed with sand and gravel enters the first chamber through the feed trough on the side wall of the first chamber. During this process, the water spray pipe is kept open to spray water on the sand and gravel mixture to keep its fluidity; step 2, after the mixture mixed with sand and gravel enters the first chamber, the first rotating motor is started to drive the first stirring shaft to rotate, and the sand and gravel mixture is first washed in the first chamber, wherein the sand and gravel preferentially enter the second chamber through the second gap; step 3, the first rotating motor is started to drive the first stirring shaft to rotate, and the sand and gravel are washed for the second time in the second chamber, and the sand and gravel are moved into the sand separation mechanism, and the slurry water is discharged from the water outlet into the water storage tank; step 4, the second rotating motor is started to drive the second stirring shaft to rotate, the sand and gravel are discharged, and then the water pump is started to pump the slurry water from the water storage tank to the slurry water concentration sedimentation tank for sedimentation separation, the mud is separated into the material storage tank, and the water is separated into the water storage tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present application utilizes a first turning over mechanism and a second turning over mechanism to turn over the mixture mixed with sand and gravel twice, separates the sand and gravel therein through a sand separation mechanism, and then passes the remaining slurry water through a slurry water separation mechanism to separate the mud and water, and sprays the separated water through a water spray pipe to achieve recycling. Compared with the prior art, the present application achieves recycling of the water in the mixture compared with traditional sand and gravel separation equipment, which greatly saves water resources and reduces sewage discharge, making it more environmentally friendly and energy-saving. At the same time, the feed trough of the present application is arranged on the side wall of the first chamber. When feeding, there is no need to excavate earth next to the equipment to raise the feeding vehicle, saving construction costs.

[0014] Additional aspects and advantages of the present invention will be given in part in the description which follows, and in part will be obvious from the description which follows, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the first turning and washing mechanism, the second turning and washing mechanism and the sand separation structure of the present invention; Figure 3It is a schematic structural diagram of the first stirring component and the second stirring component of the present invention; Figure 4 It is a structural schematic diagram of the sand separation mechanism of the present invention; Figure 5 is a schematic structural diagram of the second stirring shaft of the present invention; Figure 6 It is a structural schematic diagram of the pulp-water separation mechanism of the present invention.

[0017] The reference numerals and names in the figures are as follows: The first flipping mechanism 10, the second flipping mechanism 20, the sand separation mechanism 30, the first chamber 100, the second chamber 200, the first rotating motor 210, the first stirring shaft 110, the feed trough 120, the water spray pipe 130, the water outlet 220, the slurry-water separation mechanism 40, the material storage tank 410, the water storage tank 420, the first stirring component 140, the second stirring component 230, the first support rod 141, the first connecting rod 142, the first stirring blade 143, the first gap 144, second support rod 231, second connecting rod 232, second stirring blade 234, baffle 150, second gap 151, hopper 310, storage tank 320, third chamber 330, second stirring shaft 340, second rotating motor 350, first shaft 341, second shaft 342, connecting piece 343, hanging ring 343a, rotating body 343b, U-shaped piece 343c, water storage tank 430, slurry concentration sedimentation tank 440, water pump 441. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention is described in more detail. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, vertical, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself. In the description of the present invention, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning, and therefore cannot be understood as limiting the scope of protection of the present invention. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0023] The preferred implementation of the present invention is now further described in conjunction with the accompanying drawings. Figure 1 and Figure 2 As shown, the environmentally friendly sand and gravel separation equipment includes a first turning and washing mechanism 10, a second turning and washing mechanism 20 and a sand separation mechanism 30, wherein the first turning and washing mechanism 10 includes a first chamber 100, the second turning and washing mechanism 20 includes a second chamber 200, the first chamber 100 and the second chamber 200 are connected to each other, a first rotating motor 210 is arranged at one end of the second chamber 200, a first stirring shaft 110 is connected to the driving end of the first rotating motor 210, and the first stirring shaft 110 passes through the second The first chamber 100 and the second chamber 200 are provided with a feed trough 120 on the side wall of the first chamber 100, a water spray pipe 130 is provided on the top of the feed trough 120, the sand separation mechanism 30 is provided above the first rotating motor 210, and a water outlet 220 is provided on the side wall of the second chamber 200, the water outlet 220 is connected to the slurry-water separation mechanism 40, the slurry-water separation mechanism 40 includes a material storage tank 410 and a water storage tank 420, and the water storage tank 420 is connected to the water spray pipe 130.

[0024] Under the working loading of this embodiment, the mixture mixed with sand and gravel enters the first chamber 100 from the feed trough 120. During the entering process, the water spray pipe 130 continuously sprays water from the top of the feed trough 120 to the feed trough 120 to maintain the fluidity of the sand-water mixture. After the sand-water mixture enters the first chamber 100, the first rotating motor 210 is started to drive the first rotating shaft to rotate. The first rotating shaft rotates to turn the mixture over twice in the first turning mechanism 10 and the second turning mechanism 20. After that, the sand and gravel are discharged from the second chamber 200 through the sand separation mechanism 30, and the remaining slurry water enters the slurry water separation mechanism 40 through the water outlet 220 for two separations. The mud enters the storage tank 410 and flows into the production line for production, while the water enters the water storage tank 420 and is sprayed toward the feed trough 120 again through the water spray pipe 130, thereby forming a recycling utilization.

[0025] The present application utilizes a first turning over mechanism 10 and a second turning over mechanism 20 to turn over the mixture mixed with sand and gravel twice, separates the sand and gravel therein through a sand separation mechanism 30, and then passes the remaining slurry water through a slurry water separation mechanism 40 to separate the mud and water, and sprays the separated water through a water spray pipe 130 to achieve recycling. Compared with the prior art, the present application achieves recycling of the water in the mixture compared with traditional sand and gravel separation equipment, which greatly saves water resources and reduces sewage discharge, making it more environmentally friendly and energy-saving. At the same time, the feed trough 120 of the present application is arranged on the side wall of the first chamber 100. When feeding, there is no need to excavate earth next to the equipment to raise the feeding vehicle, saving construction costs.

[0026] On the basis of the above embodiments, Figure 2 As shown, the cross-sectional area of ​​the first chamber 100 is smaller than that of the second chamber 200, and the first stirring shaft 110 is respectively provided with a first stirring component 140 and a second stirring component 230, wherein the first stirring component 140 is contained in the first chamber 100, and the second stirring component 230 is contained in the second chamber 200. Thus, when the mixture of gravel and water passes through the first chamber 100, due to the smaller cross-sectional area of ​​the first chamber 100, the flow rate of the mixture of gravel and water is accelerated in the first chamber 100 under the drive of the stirring shaft, so that the mixture of gravel and water enters the second chamber 200 at a certain initial velocity. Thus, under the stirring of the mixture of gravel and water in the second chamber 200, the gravel will be more evenly precipitated in the second chamber 200, so that the effect of separating the gravel and sand is better. At the same time, since the cross-sectional area of ​​the first chamber 100 is smaller than that of the second chamber 200, the first chamber 100 is smaller in volume than the second chamber 200. Such a design layout can reduce the floor space of the equipment.

[0027] On the basis of the above embodiments, Figure 3 As shown, the first stirring assembly 140 includes a plurality of first support rods 141, which are vertically connected to the first stirring shaft 110, and a first connecting rod 142 is arranged on the side of the first support rod 141 away from the first stirring shaft 110, and a plurality of first stirring blades 143 are arranged on the first connecting rod 142. When the first rotating motor 210 is started to drive the first rotating shaft to rotate, the first support rod 141 drives the first connecting rod 142 to rotate around the first stirring shaft 110, thereby driving the first stirring blades 143 to rotate around the first stirring shaft 110, thereby driving the mixture in the first chamber 100 to move toward the second chamber 200, and realizing the turning over of the mixture in the first chamber 100.

[0028] On the basis of the above embodiments, Figure 3 As shown, there is a first gap 144 between the first stirring blades 143. Since the cross-sectional area of ​​the first chamber 100 is smaller than the cross-sectional area of ​​the second chamber 200, the flow rate of the sand and water mixture will be accelerated in the first chamber 100. By setting the first gap 144 between the first stirring blades 143, the first stirring blades 143 can generate a stronger centrifugal force, so that the sand and gravel in the mixture can be thrown away to the edge of the first chamber 100 more quickly.

[0029] On the basis of the above embodiments, Figure 3 As shown, the second stirring assembly 230 includes a plurality of second support rods 231, which are vertically connected to the first stirring shaft 110, and a second connecting rod 232 is arranged on the side of the second support rod 231 away from the first stirring shaft 110, and a plurality of second stirring blades 234 are arranged on the second connecting rod 232. When the first rotating motor 210 is started to drive the first rotating shaft to rotate, the second support rod 231 drives the second connecting rod 232 to rotate around the first stirring shaft 110, thereby driving the second stirring blades 234 to rotate around the first stirring shaft 110, thereby driving the mixture in the second chamber 200 to move toward the sand separation mechanism 30, and further turning over the mixture in the second chamber 200.

[0030] On the basis of the above embodiments, Figure 2 and Figure 3As shown, a baffle 150 is provided between the first stirring component 140 and the second stirring component 230. The baffle 150 is located in the first chamber 100 and is sleeved on the first stirring shaft 110. A second gap 151 exists between the baffle 150 and the first chamber 100. In this way, when the sand and gravel in the mixture are thrown to the edge of the first chamber 100 at a faster speed by the first stirring blade 143, under the action of the water flow, the sand and gravel will enter the second chamber 200 for washing preferentially compared with the slurry water. Since the sand and gravel account for the main component in the second chamber 200 at this time, the second stirring blade 234 will be more efficient in washing the sand and gravel in the second chamber 200, and driven by the second stirring blade 234, the sand and gravel will enter the sand separation mechanism 30 for separation faster.

[0031] On the basis of the above embodiments, Figure 2 , Figure 4 and Figure 5 As shown, the sand separation mechanism 30 includes a plurality of hoppers 310 sleeved on the first stirring shaft 110 and a receiving groove 320 arranged in the second chamber 200, a third chamber 330 is arranged obliquely upward on one side of the receiving groove 320, a second stirring shaft 340 is arranged in the third chamber 330, and a second rotating motor 350 is connected to the end of the second stirring shaft 340 away from the receiving groove 320. When the second stirring blade 234 drives the sand and gravel in the second chamber 200 to move to the second chamber 200, the first stirring shaft 110 drives the hopper 310 to scoop up the sand and gravel in the second chamber 200 and send it to the receiving groove 320, and then starts the second rotating motor 350 to drive the second stirring shaft 340 to rotate, thereby driving the sand and gravel to move along the third chamber 330, and then the sand and gravel are discharged from the end of the third chamber 330.

[0032] On the basis of the above embodiments, Figure 2 , Figure 4 and Figure 5As shown, the second stirring shaft 340 includes a first shaft body 341 and a second shaft body 342, the first shaft body 341 extends into the second chamber 200, the second shaft body 342 is connected to the second rotating motor 350, the first shaft body 341 and the second shaft body 342 are connected via a connecting piece 343, the connecting piece 343 includes a hanging ring 343a and a rotating body 343b coaxially arranged in the hanging ring 343a, the two ends of the rotating body 343b are detachably connected to the first shaft body 341 and the second shaft body 342 respectively, the hanging ring 343a is suspended in the third chamber 330 by a U-shaped piece 343C, so that when the second stirring shaft 340 is corroded or damaged in the second chamber 200, it is only necessary to remove and replace the first shaft body 341 extending into the second chamber 200 from the connecting piece 343, and there is no need to replace the entire second stirring shaft 340, which greatly saves the replacement cost and improves the replacement efficiency.

[0033] On the basis of the above embodiments, Figure 6 As shown, the slurry-water separation mechanism 40 includes a water storage tank 430 arranged next to the water outlet 220, a slurry-water concentration and sedimentation tank 440 is arranged on one side of the water storage tank 430, and a water pump 441 is arranged on the top of the slurry-water concentration and sedimentation tank 440. The water pump 441 draws the slurry in the water storage tank 430 from the top into the slurry-water concentration and sedimentation tank 440 for concentration and sedimentation. The material storage tank 410 and the water storage tank 420 are respectively arranged on both sides of the slurry-water concentration and sedimentation tank 440, the material storage tank 410 is connected to the bottom end of the slurry-water concentration and sedimentation tank 440, and the water storage tank 420 is connected to the The top of the slurry water concentration sedimentation tank 440 is connected, so that after the slurry water flows into the water storage tank 430 through the water outlet 220 of the second chamber 200, the water pump 441 is started to pump the slurry water into the slurry water concentration sedimentation tank 440 from the top. After the slurry water is precipitated in the slurry water concentration sedimentation tank 440, the mud therein enters the storage tank 410 through the bottom end of the slurry water concentration sedimentation tank 440 to be stored as a construction material, and the water therein enters the water storage tank 420 through the top of the slurry water concentration sedimentation tank 440 and is sprayed toward the feed trough 120 again through the water spray pipe 130, thereby forming a recycling utilization.

[0034] The present application also provides a sand and gravel separation process, comprising the following steps: step 1, a mixture mixed with sand and gravel enters the first chamber 100 through a feed trough 120 on the side wall of the first chamber 100, during which the water spray pipe 130 is kept open to spray water on the sand and gravel mixture to keep it fluid; step 2, after the mixture mixed with sand and gravel enters the first chamber 100, the first rotating motor 210 is started to drive the first stirring shaft 110 to rotate, and the sand and gravel mixture is first washed in the first chamber 100, wherein the sand and gravel pass through the second gap 151 and enter the second chamber 100 first. The second chamber 200; step three, start the first rotating motor 210 to drive the first stirring shaft 110 to rotate, wash the sand and gravel for the second time in the second chamber 200, and move the sand and gravel to the sand separation mechanism 30, and discharge the slurry water from the water outlet 220 to the water storage tank 430; step four, start the second rotating motor 350 to drive the second stirring shaft 340 to rotate, discharge the sand and gravel, and then start the water pump 441 to pump the slurry water from the water storage tank 430 to the slurry water concentration sedimentation tank 440. After sedimentation and separation, the mud is separated into the storage tank 410, and the water is separated into the water storage tank 420.

[0035] The details of the exemplary embodiments described above are not limited to the embodiments described above, and the invention may be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive in all respects, and the scope of the invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the invention.

Claims

1. An environmentally friendly sand and gravel separation equipment, characterized in that: The invention comprises a first flipping and washing mechanism (10), a second flipping and washing mechanism (20) and a sand separation mechanism (30), wherein the first flipping and washing mechanism (10) comprises a first chamber (100), the second flipping and washing mechanism (20) comprises a first chamber (100), the first chamber (100) and the second chamber (200) are communicated with each other, a first rotating motor (210) is arranged at one end of the second chamber (200), a first stirring shaft (110) is connected to the driving end of the first rotating motor (210), and the first stirring shaft (110) passes through the second chamber (200) and the first chamber (200). A chamber (100), wherein a feed trough (120) is arranged on the side wall of the first chamber (100), a water spray pipe (130) is arranged on the top of the feed trough (120), the sand separation mechanism (30) is arranged above the first rotating motor (210), and a water outlet (220) is arranged on the side wall of the second chamber (200), the water outlet (220) is connected to a slurry-water separation mechanism (40), the slurry-water separation mechanism (40) comprises a material storage tank (410) and a water storage tank (420), and the water storage tank (420) is connected to the water spray pipe (130).

2. The environmentally friendly sand and gravel separation equipment according to claim 1 is characterized in that: The cross-sectional area of ​​the first chamber (100) is smaller than the cross-sectional area of ​​the second chamber (200); a first stirring component (140) and a second stirring component (230) are respectively arranged on the first stirring shaft (110); the first stirring component (140) is accommodated in the first chamber (100) and the second stirring component (230) is accommodated in the second chamber (200).

3. The environmentally friendly sand and gravel separation equipment according to claim 2 is characterized in that: The first stirring assembly (140) comprises a plurality of first support rods (141), wherein the first support rods (141) are vertically connected to the first stirring shaft (110), a first connecting rod (142) is arranged on a side of the first support rod (141) away from the first stirring shaft (110), and a plurality of first stirring blades (143) are arranged on the first connecting rod (142).

4. The environmentally friendly sand and gravel separation equipment according to claim 3 is characterized in that: A first gap (144) exists between the first stirring blades (143).

5. The environmentally friendly sand and gravel separation equipment according to claim 1 is characterized in that: The second stirring assembly (230) comprises a plurality of second support rods (231), the second support rods (231) being vertically connected to the first stirring shaft (110), a second connecting rod (232) being arranged on a side of the second support rod (231) away from the first stirring shaft (110), and a plurality of second stirring blades (234) being arranged on the second connecting rod (232).

6. The environmentally friendly sand and gravel separation equipment according to claim 2 is characterized in that: A baffle (150) is provided between the first stirring component (140) and the second stirring component (230); the baffle (150) is located in the first chamber (100) and is sleeved on the first stirring shaft (110); and a second gap (151) exists between the baffle (150) and the first chamber (100).

7. The environmentally friendly sand and gravel separation equipment according to claim 1 is characterized in that: The sand separation mechanism (30) comprises a plurality of hoppers (310) sleeved on a first stirring shaft (110) and a receiving groove (320) arranged in a second chamber (200); a third chamber (330) is arranged on one side of the receiving groove (320) in an inclined manner upward; a second stirring shaft (340) is arranged in the third chamber (330); and a second rotating motor (350) is connected to one end of the second stirring shaft (340) away from the receiving groove (320).

8. The environmentally friendly sand and gravel separation equipment according to claim 7 is characterized in that: The second stirring shaft (340) comprises a first shaft (341) and a second shaft (342), wherein the first shaft (341) extends into the second chamber (200), and the second shaft (342) is connected to the second rotating motor (350). The first shaft (341) and the second shaft (342) are connected via a connecting member (343), wherein the connecting member (343) comprises a hanging ring (343a) and a rotating body (343b) coaxially arranged in the hanging ring (343a), wherein two ends of the rotating body (343b) are detachably connected to the first shaft (341) and the second shaft (342), respectively, and the hanging ring (343a) is suspended in the third chamber (330) via a U-shaped member (343C).

9. The environmentally friendly sand and gravel separation equipment according to claim 8, characterized in that: The slurry water separation mechanism (40) comprises a water storage tank (430) arranged next to the water outlet (220); a slurry water concentration sedimentation tank (440) is arranged on one side of the water storage tank (430); a water pump (441) is arranged on the top of the slurry water concentration sedimentation tank (440); the water pump (441) pumps the slurry water in the water storage tank (430) from the top into the slurry water concentration sedimentation tank (440) for concentration and sedimentation; the material storage tank (410) and the water storage tank (420) are respectively arranged on both sides of the slurry water concentration sedimentation tank (440); the material storage tank (410) is connected to the bottom end of the slurry water concentration sedimentation tank (440); and the water storage tank (420) is connected to the top end of the slurry water concentration sedimentation tank (440).

10. A sand and gravel separation process for the environmentally friendly sand and gravel separation equipment as claimed in claim 9, characterized in that: Features include: Step 1: The mixture mixed with sand and gravel enters the first chamber (100) through the feed slot (120) on the side wall of the first chamber (100). During this process, the water spray pipe (130) is kept open to spray water on the mixture of sand and gravel to keep the fluidity; Step 2: After the mixture containing sand and gravel enters the first chamber (100), the first rotating motor (210) is started to drive the first stirring shaft (110) to rotate, and the mixture containing sand and gravel is first washed in the first chamber (100), wherein the sand and gravel pass through the second gap (151) and enter the second chamber (200) preferentially; Step 3: starting the first rotating motor (210) to drive the first stirring shaft (110) to rotate, washing the sand and gravel for a second time in the second chamber (200), moving the sand and gravel into the sand separation mechanism (30), and discharging the slurry water from the water outlet (220) into the water storage tank (430); Step 4: Start the second rotating motor (350) to drive the second stirring shaft (340) to rotate and discharge the sand and gravel, then start the water pump (441) to pump the slurry water from the water storage tank (430) to the slurry water concentration sedimentation tank (440) for sedimentation separation, and separate the mud into the storage tank (410), and separate the water into the water storage tank (420).

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