Wastewater circulating treatment device in waste soil resource utilization process

Abstract

The invention provides a waste water circulation treatment device in a waste soil resource utilization process, the waste water circulation treatment device comprises a waste water treatment box and a sludge extrusion box, the sludge extrusion box is communicated with the waste water treatment box, and the top and the bottom of the waste water treatment box are respectively provided with a water inlet pipe and a water outlet pipe. Compared with the prior art, the device has the following beneficial effects that impurities in wastewater are primarily filtered through the coarse filter plate, then secondary filtration is performed through the fine filter plate, and fine filtration is performed through the quartz sand plate, the activated carbon particle plate and the filter membrane plate after guiding is performed through the partition plate, so that heavy metal ions, harmful odor and impurities are removed; the sewage treatment device has the advantages that by arranging the sewage treatment device, the sewage treatment quality is improved, various pollutants in the sewage are comprehensively and efficiently removed, in addition, by arranging the sludge extrusion box and the extrusion dewatering mechanism, liquid in discharged sludge impurities can be subjected to solid-liquid separation, loss of water in sludge is reduced, efficient cyclic utilization of water resources is achieved, and waste of the water resources is avoided.

Description

Technical Field

[0001] This invention relates to a wastewater recycling treatment device in the process of utilizing slag and soil resources, belonging to the field of wastewater recycling treatment. Background Technology

[0002] In the process of utilizing construction waste resources, a large amount of wastewater is generated in stages such as screening and washing of construction waste. This wastewater contains a large amount of mud, suspended solids, heavy metal ions and other impurities. If it is discharged directly, it will not only cause serious environmental pollution, such as polluting soil and water bodies, but also lead to a great waste of water resources.

[0003] Existing wastewater treatment devices have some shortcomings. Some devices have relatively simple treatment processes, making it difficult to comprehensively and efficiently remove multiple pollutants from wastewater. Furthermore, the direct discharge of filtered sludge and impurities leads to the discharge of residual liquid within the sludge and impurities, resulting in the loss of a large amount of liquid during the treatment of large quantities of wastewater, causing water waste and failing to truly achieve efficient recycling of water resources. Therefore, a wastewater recycling treatment device for the process of utilizing slag and soil resources is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a wastewater recycling treatment device in the process of utilizing slag and soil resources.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A wastewater recycling treatment device for the utilization of slag and soil resources includes a wastewater treatment tank and a sludge squeezing tank. The sludge squeezing tank is connected to the wastewater treatment tank. The top and bottom of the wastewater treatment tank are respectively provided with an inlet pipe and a drain pipe. The wastewater treatment tank is equipped with a first filter element and a second filter element. The second filter element is located above the first filter element. An additive spraying assembly is provided between the first filter element and the second filter element. A third filter element is provided below the second filter element. A partition plate is provided between the third filter element and the second filter element. The partition plate is fixed to one side of the wastewater treatment tank. The sludge squeezing tank is equipped with a squeezing and dewatering mechanism.

[0007] Furthermore, the first filter element includes a coarse filter plate fixed to one side of the top inside the wastewater treatment tank. A first rotating rod is provided above the coarse filter plate. The first rotating rod is rotatably connected to the wastewater treatment tank. A first spiral blade is installed on the first rotating rod. The end of the first rotating rod extends movably through to the outside of the wastewater treatment tank and is connected to a first motor. The first motor is installed on the outer surface of the wastewater treatment tank. A first row of impurity pipes corresponding to the coarse filter plate is opened on one side of the wastewater treatment tank.

[0008] Furthermore, the second filter element includes a fine filter plate fixed to the inner wall of the wastewater treatment tank, the fine filter plate being located below the coarse filter plate, and a plurality of second rotating rods evenly arranged above the fine filter plate. The second rotating rods are rotatably connected to the wastewater treatment tank, and a second spiral blade is installed on the first rotating rod. The end of the second rotating rod extends movably through to the outside of the wastewater treatment tank and is connected to a second motor. The second motor is installed on the outer surface of the wastewater treatment tank, and a second row of impurity pipes corresponding to the fine filter plate is opened on one side of the wastewater treatment tank.

[0009] Furthermore, the ends of both the first and second impurity pipes are connected to the collection pipe, the bottom end of the collection pipe is connected to the top opening of the sludge squeezing box, and the connection ends of the collection pipe with the first and second impurity pipes are respectively provided with a first valve and a second valve.

[0010] Furthermore, the third filter element includes a filter drawer, which is inserted into the wastewater treatment tank from the outside. Inside the filter drawer, from top to bottom, there are a quartz sand plate, an activated carbon granule plate, and a filter membrane plate. Support legs are fixedly connected to the four ends of the bottom of both the quartz sand plate and the activated carbon granule plate. A through hole is provided at the bottom of the filter drawer. Sealing slots are symmetrically opened on both sides of the filter drawer. Sealing strips are fixedly connected to the inner wall of the wastewater treatment tank at positions corresponding to the sealing slots. The sealing strips are engaged and adapted to the sealing slots.

[0011] Furthermore, the additive spraying assembly includes several porous tubes evenly spaced inside the wastewater treatment tank. The porous tubes are hollow and have several through holes on their outer surface. One end of the porous tube extends through to the outside of the wastewater treatment tank and communicates with a conveying pipe. A connector is provided in the middle of the outer surface of the conveying pipe. The other end of the conveying pipe is connected to the output end of the return water pump through a pipe. The input end of the return water pump is connected to the inside of the sludge squeezing tank.

[0012] Furthermore, the extrusion dewatering mechanism includes an extrusion block disposed on one side of the inner cavity of the sludge extrusion box. A filter membrane is fixedly connected to one side of the extrusion block, and a return water hole is also provided on the extrusion block. A threaded rod is threadedly connected to the inner wall of the sludge extrusion box. One end of the threaded rod is rotatably connected to the inner cavity of the extrusion block. A limit plate is fixedly connected to the other end of the threaded rod located outside the sludge extrusion box. Stable sliding grooves are provided on both sides of the outer surface of the threaded rod. A first gear is threadedly fitted on the threaded rod. A through hole is provided at the center of the first gear. A slider is fixed on the inner wall of the through hole. The slider is slidably connected in the stable sliding groove. A limit cover is fitted on the outer side of the first gear. The limit cover is fixed to the outer surface of the sludge extrusion box. A second gear meshes with the bottom of the first gear. The second gear is connected to the output end of a third motor. The third motor is fixedly installed on the outer surface of the sludge extrusion box. A sealing baffle is inserted at the top of the opening at one end of the sludge extrusion box.

[0013] Furthermore, the cross-sectional shape of the coarse filter plate is set as an arc-shaped structure, and the wall of the first spiral blade is in contact with the top wall of the coarse filter plate.

[0014] Furthermore, the cross-sectional shape of the fine filter plate is set as a wavy structure, and the wall of the second spiral blade is attached to the top wall of the fine filter plate.

[0015] Furthermore, a through hole is provided at the bottom of one end of the partition plate, the top wall of the partition plate has a sloping structure, a control box is provided in the middle of the partition plate, and an ultraviolet germicidal lamp is provided at the bottom of the partition plate.

[0016] The beneficial effects of this invention are:

[0017] This invention first uses a coarse filter plate to initially filter impurities in wastewater, followed by a secondary filtration using a fine filter plate. Then, guided by a separator plate, the wastewater undergoes fine filtration through a quartz sand plate, activated carbon granule plate, and filter membrane plate. This process removes heavy metal ions, harmful odors, and impurities, improving wastewater treatment quality and achieving comprehensive and efficient removal of various pollutants. Furthermore, the included sludge compression box and dewatering mechanism enable solid-liquid separation of the liquid in the discharged sludge impurities, reducing water loss from the sludge, achieving efficient water recycling, avoiding water waste, and improving overall performance.

[0018] This invention also injects flocculant into the porous tube through a connector, which mixes the liquid at the top of the fine filter plate through the porous tube, improving the impurity removal effect. By starting the first motor to control the first rotating rod to drive the first spiral blade to rotate, the impurities and wastewater at the top of the coarse filter plate can be stirred while the impurities and sludge are transported to one side of the collection pipe, avoiding clogging of the coarse filter plate and improving filtration while facilitating sewage discharge. By starting the second motor to control the second rotating rod to drive the second spiral blade to rotate, the sludge and wastewater at the top of the fine filter plate can be stirred and transported at the same time, avoiding clogging and improving the use effect.

[0019] This invention also features a discharge conveying mechanism that allows for convenient control of the sequential input of filtered sludge and impurities into the sludge compression box. First and second valves facilitate the control of sludge input. A filter drawer supports the quartz sand plate, activated carbon granule plate, and filter membrane plate. The filter drawer can be pulled out for periodic cleaning of internal impurities, improving performance. Sealing grooves and strips limit the filter drawer's position, facilitating installation and fixation. Activating the return water pump allows the separated liquid from the sludge compression box to be re-input into the wastewater treatment tank for filtration, further enhancing treatment efficiency.

[0020] The present invention, through the design of the first filter element, allows the coarse filter plate to perform preliminary filtration of impurities in wastewater. At the same time, the first rotating rod can control the rotation of the first spiral blades to transport the filtered dirt to one side, thereby improving the filtration quality and preventing clogging. Furthermore, the filtered sludge and impurities can be fed into the sludge compression box through the first impurity pipe and the collection pipe for convenient continuous processing.

[0021] This invention utilizes the design of a second filter element, allowing the fine filter plate to perform secondary filtration of wastewater. Simultaneously, the second rotating rod controls the rotation of the second spiral blades to transport sludge in one direction, thereby improving filtration quality and preventing clogging. Furthermore, the filtered sludge and impurities can be fed into the sludge compression box through the second impurity pipe and the collection pipe, facilitating continuous processing.

[0022] This invention, through the design of a third filter element, allows wastewater falling through the separator plate to pass sequentially through a silica sand plate, an activated carbon granule plate, and a filter membrane plate, thereby further filtering the filtered liquid and removing heavy metal ions, harmful odors, and impurities, thus improving the quality of wastewater treatment.

[0023] This invention, through the design of a dewatering mechanism, allows the third motor to control the second gear to rotate the first gear during use. A limiting cover enhances the stability of the first gear, thereby controlling the rotation of the threaded rod. This threaded rod then moves the extrusion block horizontally, squeezing the sludge and residual liquid in the middle of the sludge extrusion box towards one side of the sealing baffle. The resulting liquid is filtered through a membrane and a return water hole, ensuring the liquid in the sludge is located on the side of the extrusion block closer to the threaded rod. This facilitates solid-liquid separation through sludge extrusion, improving sludge treatment quality and ultimately increasing wastewater filtration efficiency and overall effectiveness.

[0024] This invention, through the design of the additive spraying component, allows flocculant to be input into a porous pipe via a connector during use. The flocculant is then sprayed into the wastewater treatment tank through the porous pipe to combine with the wastewater for flocculation treatment, thereby improving the quality of sludge removal. In addition, when the sludge is squeezed by the extrusion and dewatering mechanism, the wastewater separated by the extrusion can be returned to the porous pipe inside the wastewater treatment tank by a return water pump for circulation treatment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic cross-sectional view of a wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention.

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the wastewater treatment tank in a wastewater recycling treatment device for the utilization of slag and soil resources according to the present invention.

[0030] Figure 5 This is a schematic diagram of the third filter element of a wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention.

[0031] Figure 6 This is a schematic diagram of the extrusion dewatering mechanism of a wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention. Figure 1 ;

[0032] Figure 7 This is a schematic diagram of the extrusion dewatering mechanism of a wastewater recycling treatment device in the process of utilizing slag and soil resources according to the present invention. Figure 2 .

[0033] In the diagram, 1. Wastewater treatment tank; 2. Sludge compression tank; 3. Coarse filter plate; 4. Fine filter plate; 5. Divider plate; 6. Porous pipe; 7. First rotating rod; 8. First spiral blade; 9. Second rotating rod; 10. Second spiral blade; 11. Filter drawer; 12. Compression block; 13. Return water pump; 14. First motor; 15. Second motor; 16. Conveying pipe; 17. Connector; 18. Inlet pipe; 19. First valve; 20. Second valve; 21. 21. Main pipe; 22. First row of impurity pipes; 23. Second row of impurity pipes; 24. Control box; 25. Drain pipe; 26. Sealing slot; 27. Sealing strip; 28. Filter membrane plate; 29. ​​Activated carbon granule plate; 30. Quartz sand plate; 31. Blocking baffle; 32. Filter membrane; 33. Return water hole; 34. Threaded rod; 35. Stabilizing chute; 36. Limiting plate; 37. First gear; 38. Limiting cover; 39. Second gear; 40. Third motor. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-7This invention provides a wastewater recycling treatment device in the process of utilizing slag and soil resources. The device includes a wastewater treatment tank 1 and a sludge extrusion tank 2. The sludge extrusion tank 2 is connected to the wastewater treatment tank 1. The sludge extrusion tank 2 pressurizes the filtered sludge, thereby discharging the liquid from the sludge and achieving separation of sludge impurities from the liquid. The top and bottom of the wastewater treatment tank 1 are respectively equipped with an inlet pipe 18 and a drain pipe 25. The wastewater treatment tank 1 contains a first filter element and a second filter element, with the second filter element located above the first filter element. An additive spraying assembly is located between the first and second filter elements. A third filter element is located below the second filter element. A partition plate 5 is located between the third filter element and the second filter element, and the partition plate 5 is fixed to the wastewater treatment tank. On one side of the sludge box 1, a through hole is provided at the bottom of one end of the partition plate 5. The top wall of the partition plate 5 has a sloping structure. The partition plate 5 can guide wastewater and improve the filtration effect. A control box 24 is provided in the middle of the partition plate 5. An ultraviolet germicidal lamp is provided at the bottom of the partition plate 5. The ultraviolet germicidal lamp can sterilize the liquid at the bottom of the partition plate 5. The sludge squeezing box 2 is equipped with a squeezing and dewatering mechanism. Through the arrangement of the first filter element, the second filter element, the third filter element, the additive spraying component, and the squeezing and dewatering mechanism, this invention can achieve comprehensive and efficient removal of multiple pollutants in wastewater, improve wastewater treatment, and achieve solid-liquid separation of liquid in the discharged sludge impurities, reduce water loss in sludge, realize efficient recycling of water resources, avoid water waste, and improve the use effect.

[0036] See Figures 3-4The first filter element includes a coarse filter plate 3 fixed to one side of the top inside the wastewater treatment tank 1. The coarse filter plate 3 can perform preliminary filtration of impurities in the wastewater. A first rotating rod 7 is provided above the coarse filter plate 3. The first rotating rod 7 is rotatably connected to the wastewater treatment tank 1. A first spiral blade 8 is installed on the first rotating rod 7. The cross-sectional shape of the coarse filter plate 3 is set as an arc structure. The wall of the first spiral blade 8 is in contact with the top wall of the coarse filter plate 3. The end of the first rotating rod 7 extends movably through to the outside of the wastewater treatment tank 1 and is connected to a first motor 14. The first motor 14 is installed on the outer surface of the wastewater treatment tank 1. A first row of impurity pipes 22, corresponding to the coarse filter plate 3, is provided on one side of the wastewater treatment tank 1. During use, the coarse filter plate 3 can perform preliminary filtration of impurities in the wastewater. Simultaneously, the first spiral blade 8 can be rotated via the first rotating rod 7 to transport the filtered sludge to one side, improving filtration quality and preventing clogging. The filtered sludge and impurities can also be fed into the sludge compression box 2 through the first row of impurity pipes 22 and the collection pipe 21 for continuous processing. The second filter element includes a fine filter plate 4 fixed to the inner wall of the wastewater treatment tank 1. The fine filter plate 4 can perform secondary filtration of the wastewater and is located below the coarse filter plate 3. Below the fine filter plate 4, several second rotating rods 9 are evenly arranged above it. These second rotating rods 9 are rotatably connected to the wastewater treatment tank 1. Second spiral blades 10 are mounted on the first rotating rods 7. The cross-sectional shape of the fine filter plate 4 is a wave-shaped structure. The wall of the second spiral blades 10 is in contact with the top wall of the fine filter plate 4. The end of the second rotating rod 9 extends through to the outside of the wastewater treatment tank 1 and is connected to a second motor 15. The second motor 15 is installed on the outer surface of the wastewater treatment tank 1. In use, the fine filter plate 4 can perform secondary filtration of wastewater. Simultaneously, the second rotating rods 9 control the rotation of the second spiral blades 10 to move sludge towards... The system can convey sludge and impurities, improve filtration quality, and prevent clogging. It can also input the filtered sludge and impurities into the sludge squeezing box 2 through the second row of impurity pipes 23 and the collection pipe 21 for continuous processing. The wastewater treatment box 1 has a second row of impurity pipes 23 on one side, which corresponds to the fine filter plate 4. The ends of the first row of impurity pipes 22 and the second row of impurity pipes 23 are connected to the collection pipe 21. The bottom end of the collection pipe 21 is connected to the top opening of the sludge squeezing box 2. The connection ends of the collection pipe 21 with the first row of impurity pipes 22 and the second row of impurity pipes 23 are respectively equipped with a first valve 19 and a second valve 20.In use, the opening and closing of the first row of impurity pipes 22 and 23 and the inner cavity of the collection pipe 21 can be controlled by the first valve 19 and the second valve 20, facilitating the input of impurities and sludge from the top of the coarse filter plate 3 and the fine filter plate 4 into the sludge compression box 2 through the collection pipe 21.

[0037] See Figure 5 The third filter element includes a filter drawer 11, which is inserted into the wastewater treatment tank 1 from the outside. The interior of the filter drawer 11 contains, from top to bottom, a quartz sand plate 30, an activated carbon granule plate 29, and a filter membrane plate 28. During use, the quartz sand plate 30, activated carbon granule plate 29, and filter membrane plate 28 allow for further filtration of the filtered liquid, removing heavy metal ions, harmful odors, and impurities, thus improving wastewater treatment quality. Support legs are fixedly connected to the four ends of the bottom of both the quartz sand plate 30 and the activated carbon granule plate 29. A through hole is provided at the bottom of the filter drawer 11. Sealing slots 26 are symmetrically provided on both sides of the filter drawer 11. Sealing strips 27 are fixedly connected to the inner wall of the wastewater treatment tank 1 at positions corresponding to the sealing slots 26, and the sealing strips 27 are engaged and adapted to the sealing slots 26.

[0038] See Figures 3-4 The additive spraying assembly includes several porous tubes 6 evenly spaced inside the wastewater treatment tank 1. Each porous tube 6 has a hollow structure and several through holes on its outer surface. One end of each porous tube 6 extends through the outside of the wastewater treatment tank 1 and connects to a conveying pipe 16. A connector 17 is located in the middle of the outer surface of the conveying pipe 16. The other end of the conveying pipe 16 connects to the output end of a return water pump 13 via a pipe. The input end of the return water pump 13 connects to the interior of the sludge extrusion tank 2. In use, flocculant can be input into the porous tubes 6 through the connector 17 and sprayed into the wastewater treatment tank 1 through the porous tubes 6 to combine with the wastewater for flocculation treatment, thereby improving the quality of sludge removal. Additionally, when the extrusion dewatering mechanism extrudes the sludge, the extruded wastewater can be returned to the porous tubes 6 inside the wastewater treatment tank 1 via the return water pump 13 for recycling.

[0039] See Figures 6-7The extrusion dewatering mechanism includes an extrusion block 12 disposed on one side of the inner cavity of the sludge extrusion box 2. A filter membrane 32 is fixedly connected to one side of the extrusion block 12. A return water hole 33 is also provided on the extrusion block 12. A threaded rod 34 is threadedly connected to the inner wall of the sludge extrusion box 2. One end of the threaded rod 34 is rotatably connected to the inner cavity of the extrusion block 12. The other end of the threaded rod 34 located outside the sludge extrusion box 2 is fixedly connected to a limiting plate 36. Stable sliding grooves 35 are provided on both sides of the outer surface of the threaded rod 34. A first gear 37 is threadedly sleeved on the threaded rod 34. A through hole is provided at the center of the first gear 37. A slider is fixed on the inner wall of the through hole. The slider is slidably connected in the stable sliding groove 35. A limiting cover 38 is sleeved on the outer side of the first gear 37. The limiting cover 38 is fixed to the outer surface of the sludge extrusion box 2. The bottom of 37 is engaged with a second gear 39, which is connected to the output end of a third motor 40. The third motor 40 is fixedly installed on the outer surface of the sludge squeezing box 2. A sealing baffle 31 is inserted at the top of one end opening of the sludge squeezing box 2. In use, the third motor 40 can be started to control the second gear 39 to drive the first gear 37 to rotate. The stability of the first gear 37 is improved by the limiting cover 38, thereby controlling the rotation of the threaded rod 34. This causes the threaded rod 34 to drive the squeezing block 12 to move horizontally, thereby squeezing the sludge and residual liquid in the middle of the sludge squeezing box 2 toward the side of the sealing baffle 31. The generated liquid is filtered through the filter membrane 32 and the return water hole 33, so that the liquid in the sludge is located on the side of the squeezing block 12 close to the threaded rod 34, which facilitates the squeezing of sludge to achieve solid-liquid separation, improves the sludge treatment quality, and thus improves the wastewater filtration efficiency and the use effect.

[0040] In operation, wastewater enters the wastewater treatment tank 1 through the inlet pipe 18, falling onto the top of the coarse filter plate 3 for filtration. Simultaneously, the first motor 14 controls the first rotating rod 7 to slowly rotate the first spiral blade 8, agitating and filtering the wastewater at the top of the coarse filter plate 3 and conveying impurities to one side of the first impurity pipe 22. The filtered wastewater falls onto the top of the fine filter plate 4 for further filtration. Simultaneously, flocculant is introduced through the connector 17 and sprayed out through the porous pipe 6 to mix with the wastewater. Then, the second motor 15 controls the second rotating rod 9 to rotate the second spiral blade 10 for agitation and conveying, conveying impurities and sludge to one side of the second impurity pipe 23. The filtered liquid is guided by the partition plate 5 to fall into the middle of the filter drawer 11, then passes through the quartz sand plate 30, activated carbon granule plate 29, and filter... The membrane plate 28 achieves fine filtration, improving the filtration quality of wastewater, and discharges it through the drain pipe 25 for easy recycling. By opening the first valve 19 and the second valve 20, sludge from one side of the first impurity pipe 22 and the second impurity pipe 23 is fed into the collection pipe 21 and falls into the sludge squeezing box 2 for collection. When sludge squeezing is required, the sludge conveying is closed through the first valve 19 and the second valve 20, and then the third motor 40 is started to control the squeezing block 12 to squeeze the sludge to achieve solid-liquid separation. The liquid flows into the side of the squeezing block 12 near the threaded rod 34 through the filter membrane 32 and the return water hole 33, and the return water pump 13 is started to input the wastewater into the middle of the cavity where the porous pipe 6 is located for easy recycling and to improve the wastewater treatment effect. After squeezing, the sealing baffle 31 is opened to facilitate the discharge of sludge blocks and improve the use effect.

[0041] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wastewater recycling treatment device in the process of utilizing slag and soil resources, characterized in that, The system includes a wastewater treatment tank (1) and a sludge squeezing tank (2). The sludge squeezing tank (2) is connected to the wastewater treatment tank (1). The top and bottom of the wastewater treatment tank (1) are respectively provided with an inlet pipe (18) and a drain pipe (25). The wastewater treatment tank (1) is provided with a first filter element and a second filter element. The second filter element is located above the first filter element. An additive spraying assembly is provided between the first filter element and the second filter element. A third filter element is provided below the second filter element. A partition plate (5) is provided between the third filter element and the second filter element. The partition plate (5) is fixed to one side of the wastewater treatment tank (1). The sludge squeezing tank (2) is provided with a squeezing and dewatering mechanism.

2. The wastewater recycling treatment device in the process of utilizing slag and soil resources according to claim 1, characterized in that, The first filter element includes a coarse filter plate (3) fixed to the top side inside the wastewater treatment tank (1). A first rotating rod (7) is provided above the coarse filter plate (3). The first rotating rod (7) is rotatably connected to the wastewater treatment tank (1). A first spiral blade (8) is installed on the first rotating rod (7). The end of the first rotating rod (7) extends through to the outside of the wastewater treatment tank (1) and is connected to a first motor (14). The first motor (14) is installed on the outer surface of the wastewater treatment tank (1). A first row of impurity pipes (22) corresponding to the coarse filter plate (3) is opened on one side of the wastewater treatment tank (1).

3. The wastewater recycling treatment device in the process of utilizing slag and soil resources according to claim 2, characterized in that, The second filter element includes a fine filter plate (4) fixed on the inner wall of the wastewater treatment tank (1). The fine filter plate (4) is located below the coarse filter plate (3). Several second rotating rods (9) are evenly arranged above the fine filter plate (4). The second rotating rods (9) are rotatably connected to the wastewater treatment tank (1). A second spiral blade (10) is installed on the first rotating rod (7). The end of the second rotating rod (9) extends through to the outside of the wastewater treatment tank (1) and is connected to a second motor (15). The second motor (15) is installed on the outer surface of the wastewater treatment tank (1). A second row of impurity pipes (23) corresponding to the fine filter plate (4) is opened on one side of the wastewater treatment tank (1).

4. The wastewater recycling treatment device in the process of utilizing slag and soil resources according to claim 3, characterized in that, Both the ends of the first row of impurity pipes (22) and the second row of impurity pipes (23) are connected to the collection pipe (21). The bottom end of the collection pipe (21) is connected to the top opening of the sludge squeezing box (2). The connection ends of the collection pipe (21) with the first row of impurity pipes (22) and the second row of impurity pipes (23) are respectively provided with a first valve (19) and a second valve (20).

5. A wastewater recycling treatment device for the resource utilization process of slag and soil as described in claim 4, characterized in that, The third filter element includes a filter drawer (11), which is inserted into the wastewater treatment tank (1) from the outside. The filter drawer (11) is provided with a quartz sand plate (30), an activated carbon granule plate (29), and a filter membrane plate (28) from top to bottom. The four ends of the bottom of the quartz sand plate (30) and the activated carbon granule plate (29) are fixedly connected with support legs. The bottom of the filter drawer (11) is provided with a through hole. The filter drawer (11) is symmetrically provided with sealing slots (26) on both sides. A sealing strip (27) is fixedly connected to the inner wall of the wastewater treatment tank (1) at the position corresponding to the sealing slot (26). The sealing strip (27) is engaged and adapted to the sealing slot (26).

6. A wastewater recycling treatment device for the resource utilization process of slag and soil as described in claim 5, characterized in that, The additive spraying assembly includes several porous tubes (6) evenly spaced inside the wastewater treatment tank (1). The porous tubes (6) are hollow and have several through holes on their outer surface. One end of the porous tubes (6) extends through to the outside of the wastewater treatment tank (1) and connects to the conveying pipe (16). A connector (17) is provided in the middle of the outer surface of the conveying pipe (16). The other end of the conveying pipe (16) is connected to the output end of the return water pump (13) through a pipe. The input end of the return water pump (13) is connected to the inside of the sludge squeezing tank (2).

7. A wastewater recycling treatment device for the resource utilization process of slag and soil as described in claim 6, characterized in that, The extrusion dewatering mechanism includes an extrusion block (12) disposed on one side of the inner cavity of the sludge extrusion box (2). A filter membrane (32) is fixedly connected to one side of the extrusion block (12). A return water hole (33) is also provided on the extrusion block (12). A threaded rod (34) is threadedly connected to the inner wall of the sludge extrusion box (2). One end of the threaded rod (34) is rotatably connected to the inner cavity of the extrusion block (12). The other end of the threaded rod (34) located outside the sludge extrusion box (2) is fixedly connected to a limiting plate (36). Stable grooves (35) are provided on both sides of the outer surface of the threaded rod (34). A threaded sleeve is provided on the threaded rod (34). The first gear (37) has a through hole at its center. A slider is fixed on the inner wall of the through hole. The slider is slidably connected in the stabilizing groove (35). A limiting cover (38) is fitted on the outer side of the first gear (37). The limiting cover (38) is fixed on the outer surface of the sludge squeezing box (2). The bottom of the first gear (37) is meshed with a second gear (39). The second gear (39) is connected to the output end of a third motor (40). The third motor (40) is fixedly installed on the outer surface of the sludge squeezing box (2). A sealing baffle (31) is inserted at the top of the opening at one end of the sludge squeezing box (2).

8. A wastewater recycling treatment device for the resource utilization process of slag and soil as described in claim 7, characterized in that, The cross-sectional shape of the coarse filter plate (3) is set as an arc structure, and the wall of the first spiral blade (8) is attached to the top wall of the coarse filter plate (3).

9. A wastewater recycling treatment device for the resource utilization process of slag and soil as described in claim 8, characterized in that, The cross-sectional shape of the fine filter plate (4) is set as a wave-shaped structure, and the wall of the second spiral blade (10) is attached to the top wall of the fine filter plate (4).

10. A wastewater recycling treatment device for the resource utilization process of slag and soil according to claim 9, characterized in that, The partition plate (5) has a through hole at one end, the top wall of the partition plate (5) is a sloping structure, the middle part of the partition plate (5) is equipped with a control box (24), and the bottom of the partition plate (5) is equipped with an ultraviolet germicidal lamp.

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