Wastewater recovery equipment for producing roadbed and pavement base material

Abstract

The utility model discloses waste water recovery equipment for producing roadbed and pavement base materials, which comprises a settling pond, a semi-arc-shaped barrel is fixed and communicated with the bottom of the settling pond, a material conveying barrel is fixed and communicated with one end of the semi-arc-shaped barrel, a disc is fixed in the material conveying barrel, a rotating rod is arranged in the semi-arc-shaped barrel, and a spiral conveying blade is fixed on the outer side of the rotating rod. One end of the rotating rod penetrates through the semi-arc-shaped cylinder and is located in the semi-arc-shaped cylinder to rotate in a sealed mode, and the other end of the rotating rod is rotationally connected with the disc. When the sediment is extruded by the conical column in the conveying process in the conveying barrel, the diameter of the conical column is gradually increased from the disc to the column body, namely, the gap between the outer side of the conical column and the inner side of the conveying barrel is gradually reduced, so that the high-content sediment is extruded between the conical column and the conveying barrel; after passing through the gap between the column body and the material conveying barrel, the sediment passes through the gap between the column body and the material conveying barrel and is finally discharged from the material conveying barrel, so that a large amount of water in the sediment can be extruded out, and the sediment can be conveniently transported and reused subsequently.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater recycling equipment, and in particular to a wastewater recycling equipment for the production of roadbed and pavement base materials. Background Technology

[0002] In the production process of roadbed and pavement base materials (such as cement stabilized aggregate, lime and fly ash stabilized aggregate, etc.), it is necessary to frequently wash the mixing plant, transport vehicles, production site, etc., which will generate a large amount of wastewater containing cement, fly ash, fine aggregate and other high suspended solids.

[0003] If these wastewaters are discharged directly, they will cause serious environmental pollution and waste of water resources. Therefore, these wastewaters usually need to be treated before being discharged or reused. Existing wastewater treatment usually involves first intercepting larger materials (such as plastic bags, large sand and gravel, and strips of cloth) through a screen, and then settling them in a sedimentation tank. Gravity is used to separate the heavier inorganic particles (such as cement and fly ash). The supernatant after sedimentation can be reused for washing the production site or curing concrete, thus realizing the recycling of water resources.

[0004] However, the wastewater used for washing mixing plants, transport vehicles, and production sites mainly contains building raw materials such as cement, fly ash, and fine aggregates. It has the characteristics of high solid content and high recycling value. Therefore, the supernatant after sedimentation can be recycled and reused, and the sediment can also be recycled and reused. However, the sediment is mainly a mixture of cement, fly ash, and other hydraulic materials with water. The bottom mud formed after natural settling usually has a high water content. This mud-like substance with high water content is in a fluid plastic state. It is not only bulky, but also cannot be directly loaded and transported. During transportation, it is easy to drip and leak, causing secondary pollution and material waste. Moreover, due to its high water content, directly mixing it into the subgrade and pavement base materials will change the optimal water content of the mixture, affecting the compaction quality and strength indicators. Therefore, after the sediment is discharged, not only is transportation difficult, but dewatering is also required. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a wastewater recycling device for the production of roadbed and pavement base materials. The technical problem to be solved is that the sediment after wastewater treatment has a high water content and cannot be directly loaded and transported. During transportation, it is easy to drip and leak, causing secondary pollution and material waste. Furthermore, if the sediment is directly mixed into the roadbed and pavement base materials, it will change the optimal moisture content of the mixture, affecting the compaction quality and strength indicators.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: This utility model provides a wastewater recycling device for the production of roadbed and pavement base materials:

[0007] It includes a sedimentation tank, the bottom of which is fixed and connected to a semi-circular cylinder. One end of the semi-circular cylinder is fixed and connected to a conveying cylinder. A disc is fixed inside the conveying cylinder. A rotating rod is installed inside the semi-circular cylinder. A spiral conveying blade is fixed to the outside of the rotating rod. One end of the rotating rod passes through the semi-circular cylinder and rotates sealed inside the semi-circular cylinder. The other end of the rotating rod is rotatably connected to the disc. A motor is installed at one end of the semi-circular cylinder. The end of the rotating rod extending outside the semi-circular cylinder is fixed to the output end of the motor. Multiple through slots are opened inside the disc. A conical column is installed inside the conveying cylinder. Multiple supports are fixed to the outside of the conical column. The end of the supports away from the conical column is fixed to the inner wall of the conveying cylinder. A column body is fixed to the end of the conical column away from the disc. Multiple filter holes are opened inside the conveying cylinder. An annular filter cotton is sleeved on the outside of the conveying cylinder. There is a gap between the outside of the column body and the inside of the conveying cylinder.

[0008] Preferably, an external threaded ring is fixed to the outside of the conveying cylinder, and a first internal threaded ring is threaded to the outside of the external threaded ring. An annular cover is fixed to one side of the first internal threaded ring, and a discharge pipe is fixed inside the annular cover. A first annular plate is fixed to the end of the annular cover away from the first internal threaded ring.

[0009] Preferably, the outer side of the feed cylinder is threaded with a second internal threaded ring, and a second annular plate is fixed to one side of the second internal threaded ring. The outer diameter of the second internal threaded ring is larger than the outer diameter of the second annular plate.

[0010] Preferably, the outer diameter of the external threaded ring is larger than the outer diameter of the second internal threaded ring, and the first internal threaded ring can pass through the outer side of the second internal threaded ring.

[0011] Preferably, the inner diameter of the first annular plate is greater than the outer diameter of the second annular plate and less than the outer diameter of the second internal threaded ring.

[0012] Preferably, the diameter of the conical column gradually increases from the disk towards the column body, the diameter of the end of the conical column away from the disk is equal to the diameter of the column body, and the diameter of the column body is smaller than the inner diameter of the conveying cylinder.

[0013] Preferably, the end of the conveying cylinder away from the semi-circular cylinder is threaded with a sealing cap, and two support seats are fixed at the bottom of the sedimentation tank, with two reinforcing ribs fixed between the two support seats.

[0014] As can be seen from the above technical solutions, this application has the following beneficial effects:

[0015] 1. When the sediment is conveyed in the conveying cylinder and encounters the compression of the conical column, the diameter of the conical column gradually increases from the disk towards the column body. This means that the gap between the outer side of the conical column and the inner side of the conveying cylinder gradually decreases. This causes the high-content sediment to be squeezed between the conical column and the conveying cylinder, and then passes through the gap between the column body and the conveying cylinder, and is finally discharged from the conveying cylinder. This process can squeeze out a large amount of water from the sediment, making it easier to transport and reuse the sediment later.

[0016] 2. When it is necessary to replace the annular filter cotton or clean the annular filter cotton and filter holes, rotate the first internal threaded ring to remove it from the external threaded ring. Then move the first internal threaded ring, annular cover, and first annular plate to remove them from the feed cylinder. Then rotate the second internal threaded ring to remove it from the second internal threaded ring and the second annular plate. After that, the annular filter cotton can be removed from the feed cylinder, and the annular filter cotton and filter holes can be cleaned or replaced. Attached Figure Description

[0017] Figure 1 A schematic diagram of a wastewater recycling device for producing roadbed and pavement base materials provided by this utility model;

[0018] Figure 2 A partial structural cross-sectional schematic diagram of a wastewater recycling device for producing roadbed and pavement base materials provided by this utility model;

[0019] Figure 3 Provided by this utility model Figure 2 Enlarged schematic diagram of the middle structure;

[0020] Figure 4 A cross-sectional structural diagram of the conveying cylinder provided by this utility model;

[0021] Figure 5 Provided by this utility model Figure 3 A schematic diagram showing the breakdown of a local structure.

[0022] Figure descriptions: 1. Sedimentation tank; 2. Semi-arc cylinder; 3. Feeding cylinder; 4. Disc; 5. Rotating rod; 6. Screw conveyor blade; 7. Motor; 8. Through groove; 9. Conical column; 10. Column; 11. Support; 12. Filter hole; 13. Annular filter cotton; 14. Gap; 15. External threaded ring; 16. First internal threaded ring; 17. Annular cover; 18. Discharge pipe; 19. First annular plate; 20. Second internal threaded ring; 21. Second annular plate; 22. Support base; 23. Reinforcing rib; 24. Sealing cover. Detailed Implementation

[0023] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0024] Reference Figure 1-5 :

[0025] As an embodiment of this utility model, a wastewater recycling device for the production of roadbed and pavement base materials is provided, including a sedimentation tank 1. A semi-circular cylinder 2 is fixed and connected to the bottom of the sedimentation tank 1. A conveying cylinder 3 is fixed and connected to one end of the semi-circular cylinder 2. A sealing cap 24 is threadedly connected to the end of the conveying cylinder 3 away from the semi-circular cylinder 2. Two support seats 22 are fixed to the bottom of the sedimentation tank 1, and two reinforcing ribs 23 are fixed between the two support seats 22. A disc 4 is fixed inside the conveying cylinder 3. A rotating rod 5 is provided inside the semi-circular cylinder 2. A spiral conveying blade 6 is fixed to the outside of the rotating rod 5. One end of the rotating rod 5 passes through the semi-circular cylinder 2 and rotates sealed inside the semi-circular cylinder 2. The other end of the rotating rod 5 is rotatably connected to the disc 4. A sealing cap 24 is installed at one end of the semi-circular cylinder 2. There is a motor 7, and the end of the rotating rod 5 extending to the outside of the semi-arc cylinder 2 is fixed to the output end of the motor 7. Multiple through slots 8 are opened in the disc 4. A conical column 9 is set in the conveying cylinder 3. Multiple supports 11 are fixed on the outside of the conical column 9. The end of the support 11 away from the conical column 9 is fixed to the inner wall of the conveying cylinder 3. A column body 10 is fixed on the end of the conical column 9 away from the disc 4. Multiple filter holes 12 are opened in the conveying cylinder 3. An annular filter cotton 13 is sleeved on the outside of the conveying cylinder 3. The diameter of the conical column 9 gradually increases from the disc 4 to the column body 10. The diameter of the end of the conical column 9 away from the disc 4 is equal to the diameter of the column body 10. The diameter of the column body 10 is smaller than the inner diameter of the conveying cylinder 3. There is a gap 14 between the outside of the column body 10 and the inside of the conveying cylinder 3.

[0026] During the production of roadbed and pavement base materials (such as cement-stabilized aggregates, lime and fly ash stabilized aggregates, etc.), frequent washing of mixing plants, transport vehicles, and production sites is required, generating a large amount of wastewater containing cement, fly ash, fine aggregates, and other high suspended solids. This wastewater undergoes preliminary treatment by using a screen to intercept larger materials (such as plastic bags, large sand and gravel particles, and strips of cloth). The pre-treated wastewater is then pumped into sedimentation tank 1 for sedimentation, causing the cement, fly ash, fine aggregates, and other building materials contained in the wastewater to settle to the bottom of sedimentation tank 1 and into the semi-circular cylinder 2. The sediment is in a muddy, fluid state. After sedimentation, the supernatant in sedimentation tank 1 can be pumped out using a pump. The pumped supernatant can be reused for washing the production site or curing concrete, thus realizing the recycling of water resources.

[0027] It should be noted that after the supernatant precipitated in the sedimentation tank 1 is recycled and reused, the sealing cover 24 is rotated to remove it from the conveying cylinder 3. Then, the motor 7 is started to drive the rotating rod 5 and the screw conveyor 6 to rotate. When the screw conveyor 6 rotates, it can transport the sediment at the bottom of the sedimentation tank 1 and in the semi-arc cylinder 2 into the conveying cylinder 3. Since the sediment is a slurry-like substance in a fluid state, when the sediment is transported in the conveying cylinder 3, it is squeezed by the conical column 9. Since the diameter of the conical column 9 gradually increases from the disc 4 to the column 10, that is, the gap between the outer side of the conical column 9 and the inner side of the conveying cylinder 3 gradually decreases, the high content of sediment will be squeezed between the conical column 9 and the conveying cylinder 3, and then pass through the gap 14 between the column 10 and the conveying cylinder 3, and finally be discharged from the conveying cylinder 3. This can squeeze out a large amount of water from the sediment, which is convenient for subsequent transportation and reuse of the sediment.

[0028] Specifically, an external threaded ring 15 is fixed to the outside of the feed cylinder 3, and a first internal threaded ring 16 is threadedly connected to the outside of the external threaded ring 15. An annular cover 17 is fixed to one side of the first internal threaded ring 16, and a discharge pipe 18 is fixed inside the annular cover 17. A first annular plate 19 is fixed to the end of the annular cover 17 away from the first internal threaded ring 16. A second internal threaded ring 20 is threadedly connected to the outside of the feed cylinder 3, and a second annular plate 21 is fixed to one side of the second internal threaded ring 20. The outer diameter of the second internal threaded ring 20 is larger than the outer diameter of the second annular plate 21.

[0029] Furthermore, the outer diameter of the external threaded ring 15 is larger than the outer diameter of the second internal threaded ring 20, allowing the first internal threaded ring 16 to pass through the outside of the second internal threaded ring 20. The inner diameter of the first annular plate 19 is larger than the outer diameter of the second annular plate 21 but smaller than the outer diameter of the second internal threaded ring 20. It should be noted that because the inner diameter of the first annular plate 19 is smaller than the outer diameter of the second internal threaded ring 20 but larger than the outer diameter of the second annular plate 21, when the external threaded ring 15 and the first internal threaded ring 16 are threadedly connected, the outer sides of the first annular plate 19 and the second internal threaded ring 20 are pressed together. At this time, the external threaded ring 15, the first internal threaded ring 16, the annular cover 17, the second internal threaded ring 20, the second annular plate 21, and the first annular plate 19 can form a liquid storage chamber. When water in the sediment is squeezed out and filtered through the filter holes 12 and the annular filter cotton 13, it is squeezed into the liquid storage chamber and discharged from the discharge pipe 18. Other conduits can be connected to the discharge pipe 18 to recover the discharged water.

[0030] Furthermore, when it is necessary to replace the annular filter cotton 13 or clean the annular filter cotton 13 and filter holes 12, rotate the first internal threaded ring 16 to remove it from the external threaded ring 15, and then move the first internal threaded ring 16, the annular cover 17, and the first annular plate 19 to remove them from the feed cylinder 3. Then rotate the second internal threaded ring 20 to remove it from the second internal threaded ring 20 and the second annular plate 21. After that, the annular filter cotton 13 can be removed from the feed cylinder 3, and the annular filter cotton 13 and filter holes 12 can be cleaned or replaced.

Claims

1. A wastewater recycling device for the production of roadbed and pavement base materials, comprising a sedimentation tank (1), characterized in that, The bottom of the sedimentation tank (1) is fixed and connected to a semi-circular cylinder (2). One end of the semi-circular cylinder (2) is fixed and connected to a conveying cylinder (3). A disc (4) is fixed inside the conveying cylinder (3). A rotating rod (5) is installed inside the semi-circular cylinder (2). A spiral conveying blade (6) is fixed to the outside of the rotating rod (5). One end of the rotating rod (5) passes through the semi-circular cylinder (2) and rotates sealed inside the semi-circular cylinder (2). The other end of the rotating rod (5) is rotatably connected to the disc (4). A motor (7) is installed at one end of the semi-circular cylinder (2). The rotating rod (5) extends to the end outside the semi-circular cylinder (2) and... The output end of the motor (7) is fixed. Multiple through slots (8) are provided in the disc (4). A conical column (9) is provided in the feed cylinder (3). Multiple supports (11) are fixed on the outside of the conical column (9). The end of the support (11) away from the conical column (9) is fixed to the inner wall of the feed cylinder (3). A column (10) is fixed on the end of the conical column (9) away from the disc (4). Multiple filter holes (12) are provided in the feed cylinder (3). A ring-shaped filter cotton (13) is sleeved on the outside of the feed cylinder (3). There is a gap (14) between the outside of the column (10) and the inside of the feed cylinder (3).

2. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 1, characterized in that, An external threaded ring (15) is fixed on the outside of the feed cylinder (3). A first internal threaded ring (16) is threadedly connected to the outside of the external threaded ring (15). An annular cover (17) is fixed on one side of the first internal threaded ring (16). A discharge pipe (18) is fixed inside the annular cover (17). A first annular plate (19) is fixed at the end of the annular cover (17) away from the first internal threaded ring (16).

3. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 2, characterized in that, The feed cylinder (3) is threaded with a second internal thread ring (20) on the outside. A second annular plate (21) is fixed on one side of the second internal thread ring (20). The outer diameter of the second internal thread ring (20) is greater than the outer diameter of the second annular plate (21).

4. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 3, characterized in that, The outer diameter of the external threaded ring (15) is greater than the outer diameter of the second internal threaded ring (20), and the first internal threaded ring (16) can pass through the outside of the second internal threaded ring (20).

5. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 3, characterized in that, The inner diameter of the first annular plate (19) is greater than the outer diameter of the second annular plate (21) and less than the outer diameter of the second internal threaded ring (20).

6. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 1, characterized in that, The diameter of the conical column (9) gradually increases from the disk (4) toward the column (10). The diameter of the end of the conical column (9) away from the disk (4) is equal to the diameter of the column (10). The diameter of the column (10) is smaller than the inner diameter of the conveying cylinder (3).

7. The wastewater recycling equipment for producing roadbed and pavement base materials according to claim 1, characterized in that, The end of the conveying cylinder (3) away from the semi-arc cylinder (2) is threaded with a sealing cap (24), and two support seats (22) are fixed at the bottom of the sedimentation tank (1), and two reinforcing ribs (23) are fixed between the two support seats (22).

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