Civil engineering-based road construction wastewater recycling system and process

Abstract

The application relates to the technical field of wastewater treatment, and discloses a road construction wastewater recycling system and process based on civil engineering, wherein the road construction wastewater recycling system based on civil engineering comprises a recovery box, a homogenizing tank and a reaction tank arranged in the recovery box, and an equipment room arranged at the bottom of the recovery box, and further comprises a partition assembly and a mixing assembly arranged in the homogenizing tank. The road construction wastewater recycling system and process based on civil engineering are provided with the partition assembly and the mixing assembly, when working, the partition plates are not arranged side by side, the partition effect is lost, and homogenization is realized; after the sewage homogenization is completed, the partition plates are arranged side by side again, partition is completed, the data of the sewage in each partition interval are not greatly different, the sewage in each partition interval is guided into the reaction tank for treatment in batches, and the above method can reduce energy consumption without the mixing assembly working continuously to maintain homogenization.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a system and process for reusing road construction wastewater based on civil engineering. Background Technology

[0002] In the field of civil engineering road construction, construction wastewater mainly originates from foundation pit drainage, roadbed maintenance wastewater, concrete mixing plant washing wastewater, construction machinery washing wastewater, and site dust suppression washing wastewater. This type of wastewater has a high suspended solids (SS) content, is weakly alkaline, and its discharge is significantly intermittent and fluctuating, with large fluctuations in volume and quality over short periods. If construction wastewater is discharged directly without treatment, it will cause soil pollution, pipe network blockage, and water turbidity, damaging the ecological environment of the construction site and its surroundings. It will also waste water resources, contradicting the policy requirements of green construction, water conservation and emission reduction, and ecological environmental protection. Therefore, collecting, purifying, and reusing road construction wastewater on-site is a key technical means to control construction environmental pollution and improve water resource utilization.

[0003] Current road construction wastewater treatment and reuse equipment and processes typically consist of multiple functional units, including collection, pretreatment, coagulation and sedimentation, filtration and purification, and reuse. These units work together to remove pollutants and improve water quality, ultimately achieving a closed-loop recycling of construction wastewater. To ensure continuous, stable, and efficient operation of the entire treatment system and to prevent fluctuations in wastewater discharge from impacting subsequent purification units, existing wastewater treatment equipment must be equipped with a homogenization and equalization unit. This unit serves as an essential buffer and balancing device before the wastewater enters the core treatment stage and is a key structure for maintaining the stability of the overall treatment process.

[0004] Because road construction wastewater discharge is unpredictable and exhibits large instantaneous fluctuations in volume, the homogenization and conditioning unit must be designed with a large volume and storage capacity to meet the requirements for wastewater buffering, storage, and water quality balance. This ensures it can adapt to the wastewater discharge conditions throughout the construction process and prevents sudden changes in water volume from affecting the stability of the treatment system. In actual operation, to continuously maintain the homogeneity of the wastewater, prevent sediment deposition, and ensure uniform and stable water quality, the homogenization and conditioning unit must rely on mixing equipment for uninterrupted mixing.

[0005] Due to the limitations of large size and large water capacity of homogenizing equipment, mixing equipment operates under heavy loads, requiring significant energy to maintain homogeneity. This not only substantially increases equipment operating energy consumption and construction and maintenance costs but also increases energy consumption and carbon emissions during construction, failing to meet the core requirements of ecological environmental protection and low-carbon green construction. Addressing the technical shortcomings of the aforementioned road construction wastewater reuse equipment, which suffers from excessively high energy consumption for homogenization, developing a wastewater reuse device that can reduce energy consumption while ensuring homogenization effects and is adaptable to road construction scenarios has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] Given that existing technologies suffer from excessive energy consumption for maintaining homogeneous regulation, high equipment operating load, and high maintenance costs, which do not meet the requirements of low-carbon and green construction, a road construction wastewater reuse system and process based on civil engineering is proposed.

[0007] This application provides a road construction wastewater reuse system and process based on civil engineering, the purpose of which is to reduce energy consumption while ensuring homogeneity, adapt to road construction scenarios, and solve the problems of high energy consumption and high operation and maintenance costs of existing equipment.

[0008] The technical solution of the present invention is as follows: a road construction wastewater reuse system based on civil engineering, including a recycling tank, a homogenizing tank and a reaction tank disposed in the recycling tank, an equipment chamber disposed at the bottom of the recycling tank, and a partition component and a mixing component disposed in the homogenizing tank. The partition component includes a central shaft disposed in a linear array between the homogenizing tank and the equipment chamber, a partition plate disposed outside the central shaft, a rotating seat and a sliding seat disposed in the equipment chamber, a deflection gear disposed on the top of the rotating seat, a rack disposed in the sliding seat, and a control plate disposed near the opening of the equipment chamber on the rack. The mixing component includes an annular frame disposed within a homogenizing tank, a turbine disposed within the annular frame, an inlet located on the outside of the annular frame, a rotating shaft disposed between the homogenizing tank and the equipment chamber, and a drive motor disposed within the equipment chamber. The baffles are located in the homogenization tank and there are no fewer than two sets of them, which divide the space in the homogenization tank into several independent sections. The central shaft is inserted through the rotating seat, the deflection gear meshes with the rack, the turbine is located above the water inlet, and the turbine is connected to the drive motor through the rotating shaft.

[0009] Furthermore, the partition assembly also includes mating grooves disposed on both sides of the partition plate and edge strips disposed on the inner wall of the homogenization tank; The mating grooves on both sides of the partition are diagonally distributed, and adjacent partitions are engaged with each other through the mating grooves. The partitions are also engaged with the edge strips through the mating grooves.

[0010] Furthermore, a mesh cover is provided at the opening of the water inlet.

[0011] Furthermore, the mixing assembly also includes a rotating ring outside the annular frame, a collection box disposed outside the rotating ring, and a transmission assembly disposed between the collection box and the turbine; The collection box is divided into two parts: one part is arc-shaped and fits into the mesh cover, and the other part is tangent to the outer contour of the mesh cover.

[0012] Furthermore, a guide plate is installed at the opening of the collection box.

[0013] Furthermore, the transmission assembly includes a rotating tube disposed on the top of the collection box, a rotating sleeve disposed inside the rotating tube, a paddle disposed on the top of the rotating sleeve, a toothed ring disposed on the top of the annular frame, a rotating gear disposed on the top of the turbine, and an impeller disposed on the top of the rotating gear. The paddle extends toward the central axis of the annular frame, the gear ring meshes with the rotating gear, and the movement trajectory of the impeller intersects with the movement trajectory of the paddle.

[0014] Furthermore, the transmission assembly also includes a locking rod disposed inside the rotating sleeve, a sliding groove opened on the outside of the locking rod, a sliding block disposed on the inner wall of the rotating sleeve, and a locking groove opened on the bottom wall of the homogenizing tank. The card rod extends downwards and is inserted into the card slot. The card slot is distributed in a circular array along the outer contour of the annular frame. The sliding block extends into the sliding groove, which is spiral in shape. A reset torsion spring is provided between the rotating sleeve and the rotating tube.

[0015] Furthermore, the equipment room is equipped with an installation platform, and the rotating seat, sliding seat and drive motor are all installed on the installation platform.

[0016] This invention also provides a process for reusing road construction wastewater based on civil engineering, comprising the following steps: Step 1: Collect wastewater in separate sections and direct it into the collection tank; use a mesh screen to intercept large particles of impurities, and allow the wastewater to flow by gravity into the primary grit chamber to complete pretreatment; Step 2: The pretreated wastewater is fed into a homogenizing tank, where it is continuously stirred at low speed by a mixing component to prevent stratification and sedimentation, and maintained for 1 hour; Step 3: Pump the homogenized wastewater into the reaction tank, add polyaluminum chloride and polyacrylamide using a dosing device, and stir to form flocs; Step 4: The wastewater containing alum floc enters the inclined tube sedimentation tank, forming sludge, and the supernatant flows by gravity into the next process. Step 5: The supernatant is deeply purified using a filter tank to remove residual particles, odors and trace impurities. The qualified clean water is then collected and stored in a seepage-proof clean water tank. Step Six: The treated water from the clear water tank is recycled through a dedicated pipeline network for roadbed maintenance, site dust suppression, and mechanical washing.

[0017] The beneficial effects of this invention are: 1. By setting up a partition component and a mixing component, during operation, the deflection gear drives the partitions to deflect at a certain angle through the central shaft, so that the partitions are no longer arranged side by side, thus losing the partitioning effect. At the same time, the drive motor is started, and the turbine pushes the water flow in the center of the reaction tank upward. The water flow around the reaction tank flows through the inlet to the bottom of the turbine. In this way, the water flow circulates in the reaction tank, achieving a homogenization effect. After the sewage homogenization is completed, the partitions are arranged side by side again to complete the partitioning, and the mixing component is turned off. In this way, the sewage data in each partition section is not significantly different. The sewage in each partition section is introduced into the reaction tank for treatment in stages, without the need to frequently adjust the treatment process data. At the same time, the above method does not require the mixing component to work continuously to maintain homogenization, which can reduce energy consumption and is more in line with the current mainstream concept of environmental protection.

[0018] 2. By setting up a collection box, when the turbine rotates, the collection box is driven to rotate around the mesh cover through the transmission component. Small particles attached to the surface of the mesh cover are scraped off by the collection box and flow into the collection box, thus avoiding the mesh cover from being blocked and allowing the equipment to maintain smooth circulation for a long time.

[0019] 3. By setting up a paddle and impeller, when the turbine rotates, it drives the rotating gear and impeller to revolve around the annular frame. During this process, the outer blades of the impeller will contact the paddle, and the paddle will drive the rotating sleeve and rotating tube to move synchronously. The collection box will also move with the rotating tube. While the rotating gear revolves, the gear ring itself will also rotate. Since the impeller will rotate with the rotating gear, it will separate from the paddle when it rotates to a certain angle. This makes the collection box rotate intermittently over short distances, which can not only avoid excessive friction on the screen, but also stabilize the water flow outside the screen, making it easier for the collection box to collect small particles.

[0020] 4. By setting a locking lever, when the impeller pushes the paddle, the paddle is forced to deflect the rotating sleeve. During the deflection of the rotating sleeve, the sliding block slides in the sliding groove, lifting the locking lever upward and causing it to leave the slot, thus unlocking the collection box. After the sliding block slides to the end of the sliding groove, it can no longer move, and the paddle can no longer deflect, so it moves with the impeller. After the paddle separates from the impeller, the rotating sleeve is reset under the action of the return torsion spring, and the locking lever slides down into the slot, locking the collection box again. This prevents the force generated by the water flow from affecting the stability of the collection box. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the mounting platform for the present invention; Figure 3 This is a schematic diagram of the partition component of the present invention; Figure 4 This is a schematic diagram of the partition of the present invention; Figure 5 This is a schematic diagram of the hybrid component of the present invention; Figure 6 This is a disassembled diagram of the hybrid component of the present invention; Figure 7 This is a schematic diagram of the collection box of the present invention; Figure 8 This is a schematic diagram of the turbine of the present invention; Figure 9 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 10 This is a top view of the present invention; Figure 11 For the present invention Figure 10 Enlarged view of the medium homogenizing tank; Figure 12 For the present invention Figure 10 Sectional view at point BB; Figure 13 For the present invention Figure 11 Sectional view at CC; Figure 14 For the present invention Figure 11 Sectional view at point DD; Figure 15 For the present invention Figure 14 Enlarged view of point E in the middle.

[0022] In the picture: 1. Recycling bin; 11. Homogenizing tank; 12. Reaction tank; 13. Equipment room; 2. Partition assembly; 21. Central shaft; 22. Partition plate; 23. Rotating seat; 24. Deflecting gear; 25. Sliding seat; 26. Rack; 27. Control panel; 28. Fitting groove; 29. ​​Side strip; 3. Mixing assembly; 31. Annular frame; 32. Turbine; 33. Inlet; 34. Rotating shaft; 35. Drive motor; 36. Mesh cover; 37. Rotating ring; 38. Collection box; 39. Guide plate; 310. Rotating pipe; 311. Rotating sleeve; 312. Paddle; 313. Gear ring; 314. Rotating gear; 315. Impeller; 316. Locking rod; 317. Sliding groove; 318. Sliding block; 319. Slot; 4. Mounting platform. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Example 1, referring to Figures 1-15This is the first embodiment of the present invention, which provides a road construction wastewater reuse system based on civil engineering, including a recycling tank 1, a homogenizing tank 11 and a reaction tank 12 disposed in the recycling tank 1, an equipment chamber 13 disposed at the bottom of the recycling tank 1, and a partition component 2 and a mixing component 3 disposed in the homogenizing tank 11. The partition component 2 includes a central shaft 21 disposed in a linear array between the homogenizing tank 11 and the equipment chamber 13, a partition plate 22 disposed outside the central shaft 21, a rotating seat 23 and a sliding seat 25 disposed in the equipment chamber 13, a deflection gear 24 disposed on the top of the rotating seat 23, a rack 26 disposed in the sliding seat 25, and a control plate 27 disposed on the rack 26 near the opening of the equipment chamber 13.

[0025] The mixing component 3 includes an annular frame 31 disposed within the homogenizing tank 11, a turbine 32 disposed within the annular frame 31, an inlet 33 opened on the outside of the annular frame 31, a rotating shaft 34 disposed between the homogenizing tank 11 and the equipment chamber 13, and a drive motor 35 disposed within the equipment chamber 13.

[0026] Specifically, before entering the recycling tank 1, the wastewater needs to be treated by a pretreatment unit, which includes a drainage ditch, a diversion channel, a collection tank, a bar screen, a grit chamber, and an oil separator. This removes large particulate impurities and floating oil from the wastewater. After being discharged from the recycling tank 1, the wastewater also needs to be treated by a deep treatment unit, which includes an inclined tube sedimentation tank and a filter tank. A dosing device and a stirring device are also installed above the reaction tank 12. After the wastewater is treated, it enters the anti-seepage clear water tank. All the above-mentioned units are connected by wastewater pipes to transport wastewater at different levels.

[0027] The volume of the homogenization tank 11 is more than three times that of a single reaction tank 12, allowing for the simultaneous storage of a large amount of homogenized wastewater. Data collected once can be used for an extended period, requiring repeated data collection only when the tank is refilled, thus simplifying the processing. The equipment chamber 13 is located below the homogenization tank 11. A partition 22 is bolted to the central shaft 21. A sealing ring is installed between the central shaft 21 and the inner wall of the equipment chamber 13. At least two sets of partitions 22 are installed within the homogenization tank 11, dividing the space into several independent sections. The distance between adjacent central shafts 21 in different groups is greater than the distance between adjacent central shafts 21 in the same group. The central shaft 21 is inserted through and rotatably connected to the rotating seat 23. A deflection gear 24 is rotatably connected to the rotating seat 23 and also engages with the central shaft 21. The deflection gear 24 meshes with a rack 26, which is slidably mounted within a sliding seat 25. The control panel 27 can be manually pushed and pulled or driven by a motor.

[0028] The annular frame 31 is fixed to the center of the bottom wall of the homogenizing tank 11 by bolts. The turbine 32 is rotatably installed inside the annular frame 31. The turbine 32 is located above the water inlet 33. The turbine 32 is connected to the drive motor 35 through the rotating shaft 34. A sealing ring is provided between the rotating shaft 34 and the inner wall of the equipment chamber 13.

[0029] By setting up the partition component 2 and the mixing component 3, during operation, the control plate 27 first drives the rack 26 to move, the rack 26 drives the deflection gear 24 to rotate, and the deflection gear 24 drives the partition 22 to deflect at a certain angle through the central shaft 21, so that the partition 22 is no longer arranged side by side, losing its partitioning effect. At the same time, the drive motor 35 is started, and the drive motor 35 drives the turbine 32 to rotate through the rotating shaft 34. The turbine 32 pushes the water flow at the center of the reaction tank 12 upward, and the water flow around the reaction tank 12 flows through the inlet 33 to the bottom of the turbine 32. In this way, the water flow circulates in the reaction tank 12, realizing... To achieve a homogenization effect, the deflection angle of the baffle 22 can be continuously changed during the process, causing changes in the water circulation route and achieving a good homogenization effect. After the sewage homogenization is completed, the baffle 22 is rotated and reset again by the control plate 27, so that the baffles 22 are arranged side by side again to complete the separation, and the mixing component 3 is turned off. In this way, the sewage data in each separation section is not much different. The sewage in each separation section is introduced into the reaction tank 12 for treatment in stages, without the need to frequently adjust the treatment process data. At the same time, the above method does not require the mixing component 3 to work continuously to maintain homogenization, which can reduce energy consumption.

[0030] The partition assembly 2 also includes mating grooves 28 disposed on both sides of the partition plate 22 and edge strips 29 disposed on the inner wall of the homogenization tank 11.

[0031] Specifically, the mating grooves 28 on both sides of the partition 22 are diagonally distributed. Adjacent partitions 22 are engaged with each other through the mating grooves 28. The partitions 22 are also engaged with the edge strips 29 through the mating grooves 28. Rubber sealing strips are laid on the inner wall of the mating grooves 28 and the outer contour of the partitions 22. When the partitions 22 are arranged side by side, the partitions 22 are engaged with each other through the mating grooves 28, and the rubber sealing strips are squeezed and deformed to achieve a good sealing effect, preventing sewage from the adjacent partitions from seeping into the waterless partitions after sewage is discharged from one partition.

[0032] A mesh cover 36 is installed at the opening of the inlet 33 to intercept small particles of sewage and prevent these particles from damaging the turbine 32.

[0033] The mixing component 3 also includes a rotating ring 37 outside the annular frame 31, a collection box 38 disposed outside the rotating ring 37, and a transmission component disposed between the collection box 38 and the turbine 32.

[0034] Specifically, the rotating ring 37 is rotatably connected to the annular frame 31, and the collection box 38 is fixed to the rotating ring 37 by bolts. The collection box 38 is divided into two parts: one part is arc-shaped and fits against the mesh cover 36, and the other part is tangent to the outer contour of the mesh cover 36. A guide plate 39 is installed at the opening of the collection box 38 so that small particles outside the mesh cover 36 can flow more smoothly into the collection box 38, and also prevent small particles that have entered the collection box 38 from flowing back out.

[0035] By setting up a collection box 38, when the turbine 32 rotates, the collection box 38 is driven to rotate around the mesh cover 36 through the transmission component. Small particles attached to the surface of the mesh cover 36 are scraped off by the collection box 38 and flow into the collection box 38, thus preventing the mesh cover 36 from being blocked and allowing the equipment to maintain smooth circulation for a long time.

[0036] The transmission assembly includes a rotating tube 310 disposed on the top of the collection box 38, a rotating sleeve 311 disposed inside the rotating tube 310, a paddle 312 disposed on the top of the rotating sleeve 311, a toothed ring 313 disposed on the top of the annular frame 31, a rotating gear 314 disposed on the top of the turbine 32, and an impeller 315 disposed on the top of the rotating gear 314.

[0037] Specifically, the rotating tube 310 is welded to the top of the collection box 38, the rotating sleeve 311 is rotatably inserted into the rotating tube 310, the paddle 312 is fixed to the rotating sleeve 311 by bolts, the paddle 312 extends towards the central axis of the annular frame 31, the toothed ring 313 is fixed to the top of the annular frame 31 by bolts, the teeth of the toothed ring 313 are located on the inner ring side, the toothed ring 313 meshes with the rotating gear 314, the rotating gear 314 is rotatably connected to the turbine 32, the impeller 315 is fixed to the rotating gear 314 by bolts, the movement trajectory of the impeller 315 intersects with the movement trajectory of the paddle 312, and the number of teeth of the toothed ring 313 cannot be divided evenly by the number of teeth of the rotating gear 314.

[0038] The transmission assembly also includes a locking rod 316 disposed inside the rotating sleeve 311, a sliding groove 317 opened on the outside of the locking rod 316, a sliding block 318 disposed on the inner wall of the rotating sleeve 311, and a locking groove 319 opened on the bottom wall of the homogenizing tank 11.

[0039] Specifically, the upper end of the lever 316 is rotatably connected to the rotating sleeve 311, and the lower end of the lever 316 is slidably inserted into the rotating tube 310, and extends downward through the collection box 38 and the guide plate 39 to be inserted into the slot 319. The slot 319 is distributed in a ring array along the outer contour of the annular frame 31. The sliding block 318 extends into the sliding groove 317. The sliding groove 317 is spiral in shape, and the number of spiral turns does not exceed one-third of the total number of turns. The pitch length is greater than the depth of the slot 319. A reset torsion spring is provided between the rotating sleeve 311 and the rotating tube 310.

[0040] By setting the paddle 312 and impeller 315, when the turbine 32 rotates, it drives the rotating gear 314 and impeller 315 to revolve around the annular frame 31. During this process, the outer blades of the impeller 315 will contact the paddle 312, and through the paddle 312, the rotating sleeve 311 and the rotating tube 310 will move synchronously. The collection box 38 will also move with the rotating tube 310. While the rotating gear 314 revolves, the gear ring 313 will also rotate on its own axis. Since the impeller 315 will rotate with the rotating gear 314, the impeller 315 will separate from the paddle 312 when it rotates to a certain angle. This makes the collection box 38 rotate intermittently over short distances, which can not only avoid the screen 36 being excessively rubbed, but also stabilize the water flow outside the screen 36, making it easier for the collection box 38 to collect small particles.

[0041] By setting the lever 316, when the impeller 315 pushes the paddle 312, the paddle 312 is forced to cause the rotating sleeve 311 to deflect. During the deflection of the rotating sleeve 311, the sliding block 318 slides in the sliding groove 317 to lift the lever 316 upward, causing the lever 316 to leave the slot 319 and unlock the collection box 38. After the sliding block 318 slides to the end of the sliding groove 317, it can no longer move, and the paddle 312 can no longer deflect, so it moves with the impeller 315. After the paddle 312 separates from the impeller 315, the rotating sleeve 311 is reset under the action of the reset torsion spring, and the lever 316 slides down into the slot 319, locking the collection box 38 again. This avoids the force generated by the water flow from affecting the stability of the collection box 38.

[0042] The equipment room 13 is equipped with a mounting platform 4. The rotating seat 23, the sliding seat 25 and the drive motor 35 are all mounted on the mounting platform 4 and fixed with bolts. By pulling the mounting platform 4, these components can be moved out of the equipment room 13, which facilitates the debugging and maintenance of the equipment.

[0043] Example 2, refer to Figures 1-15 The second embodiment of the present invention provides a process for reusing road construction wastewater based on civil engineering, comprising the following steps: Step 1: Install anti-seepage drainage ditches and diversion channels in each wastewater generation area of ​​the construction site to collect wastewater in different areas and collect it into the collection pool; install a 5-10mm gap screen at the inlet of the collection pool to intercept large particles of impurities, and regularly clean and transport the screen residue off the site; the wastewater flows by gravity into the primary sedimentation tank to remove coarse silt, and the oily wastewater needs to be separated by an oil separator to remove floating oil, thus completing the pretreatment.

[0044] Step 2: The pretreated wastewater is fed into the homogenization tank 11, where it is continuously stirred at low speed by the mixing component 3 to prevent stratification and sedimentation. This process is maintained for 1 hour to balance the water quality, quantity, and pH value.

[0045] Step 3: Pump the homogenized wastewater into reaction tank 12. Use a dosing device to first add 50-100 mg / L polyaluminum chloride and mix quickly, then add 1-3 mg / L polyacrylamide. Stir slowly at 30-50 r / min for 10-15 min to allow the small particles to coagulate and form dense flocs, preparing for subsequent sedimentation.

[0046] Step 4: The wastewater containing alum floc enters the inclined tube sedimentation tank, using hexagonal inclined tube packing. It stays for 40-60 minutes, utilizing the principle of shallow tank to achieve rapid sedimentation of alum floc, forming sludge. The supernatant flows by gravity into the next process.

[0047] Step 5: The supernatant is then filtered through quartz sand and activated carbon filters for deep purification to remove residual fine particles, odors and trace impurities. The filtered effluent has SS ≤ 50 mg / L and pH 6.0-9.0. The qualified clean water is then collected and stored in a seepage-proof clean water tank.

[0048] Step Six: The treated water from the clear water tank is recycled through a dedicated pipeline network for construction scenarios such as roadbed maintenance, site dust suppression, and mechanical washing, achieving 100% closed-loop reuse.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A road construction wastewater reuse system based on civil engineering, comprising a recycling tank (1), a homogenization tank (11) and a reaction tank (12) disposed within the recycling tank (1), and an equipment chamber (13) disposed at the bottom of the recycling tank (1), characterized in that: It also includes a partition assembly (2) and a mixing assembly (3) disposed in the homogenizing tank (11). The partition assembly (2) includes a central shaft (21) disposed in a linear array between the homogenizing tank (11) and the equipment chamber (13), a partition plate (22) disposed outside the central shaft (21), a rotating seat (23) and a sliding seat (25) disposed in the equipment chamber (13), a deflection gear (24) disposed on the top of the rotating seat (23), a rack (26) disposed in the sliding seat (25), and a control plate (27) disposed near the opening of the equipment chamber (13) on the rack (26). The mixing component (3) includes an annular frame (31) disposed in the homogenizing tank (11), a turbine (32) disposed in the annular frame (31), an inlet (33) opened on the outside of the annular frame (31), a rotating shaft (34) disposed between the homogenizing tank (11) and the equipment chamber (13), and a drive motor (35) disposed in the equipment chamber (13). The partition (22) is located in the homogenization tank (11) and there are no fewer than two sets of partitions, which divide the space in the homogenization tank (11) into several independent sections. The central shaft (21) is inserted through the rotating seat (23). The deflection gear (24) meshes with the rack (26). The turbine (32) is located above the water inlet (33). The turbine (32) is connected to the drive motor (35) through the rotating shaft (34).

2. The road construction wastewater reuse system based on civil engineering according to claim 1, characterized in that: The partition assembly (2) also includes mating grooves (28) on both sides of the partition (22) and side strips (29) on the inner wall of the homogenizing tank (11). The mating grooves (28) on both sides of the partition (22) are diagonally distributed. Adjacent partitions (22) are engaged with each other through the mating grooves (28), and the partitions (22) are also engaged with the side strips (29) through the mating grooves (28).

3. The road construction wastewater reuse system based on civil engineering according to claim 1, characterized in that: A mesh cover (36) is provided at the opening of the water inlet (33).

4. The road construction wastewater reuse system based on civil engineering according to claim 3, characterized in that: The mixing component (3) also includes a rotating ring (37) outside the annular frame (31), a collection box (38) disposed outside the rotating ring (37), and a transmission component disposed between the collection box (38) and the turbine (32); The collection box (38) is divided into two parts: one part is arc-shaped and fits the mesh cover (36), and the other part is tangent to the outer contour of the mesh cover (36).

5. The road construction wastewater reuse system based on civil engineering according to claim 4, characterized in that: A guide plate (39) is installed at the opening of the collection box (38).

6. The road construction wastewater reuse system based on civil engineering according to claim 4, characterized in that: The transmission assembly includes a rotating tube (310) disposed on the top of the collection box (38), a rotating sleeve (311) disposed inside the rotating tube (310), a paddle (312) disposed on the top of the rotating sleeve (311), a toothed ring (313) disposed on the top of the annular frame (31), a rotating gear (314) disposed on the top of the turbine (32), and an impeller (315) disposed on the top of the rotating gear (314). The paddle (312) extends toward the central axis of the annular frame (31), the toothed ring (313) meshes with the rotating gear (314), and the movement trajectory of the impeller (315) intersects with the movement trajectory of the paddle (312).

7. The road construction wastewater reuse system based on civil engineering according to claim 6, characterized in that: The transmission assembly also includes a locking rod (316) disposed inside the rotating sleeve (311), a sliding groove (317) opened on the outside of the locking rod (316), a sliding block (318) disposed on the inner wall of the rotating sleeve (311), and a locking groove (319) opened on the bottom wall of the homogenizing tank (11). The lever (316) extends downward and is inserted into the slot (319). The slot (319) is arranged in a ring array along the outer contour of the ring frame (31). The sliding block (318) extends into the sliding groove (317). The sliding groove (317) is spiral. A reset torsion spring is provided between the rotating sleeve (311) and the rotating tube (310).

8. The road construction wastewater reuse system based on civil engineering according to claim 1, characterized in that: The equipment room (13) is equipped with an installation platform (4), and the rotating seat (23), sliding seat (25) and drive motor (35) are all installed on the installation platform (4).

9. A process for reusing road construction wastewater based on civil engineering, employing the road construction wastewater reuse system based on civil engineering as described in claim 1, characterized in that, Includes the following steps: Step 1: Collect wastewater in separate sections and direct it into the collection tank; use a mesh screen to intercept large particles of impurities, and allow the wastewater to flow by gravity into the primary grit chamber to complete pretreatment; Step 2: The pretreated wastewater is fed into the homogenizing tank (11), and the mixing component (3) continuously stirs it at a low speed to prevent stratification and sedimentation, and keeps it for 1 hour; Step 3: Pump the homogenized wastewater into the reaction tank (12), add polyaluminum chloride and polyacrylamide using the dosing device, and stir to form flocs; Step 4: The wastewater containing alum floc enters the inclined tube sedimentation tank, forming sludge, and the supernatant flows by gravity into the next process. Step 5: The supernatant is deeply purified using a filter tank to remove residual particles, odors and trace impurities. The qualified clean water is then collected and stored in a seepage-proof clean water tank. Step Six: The treated water from the clear water tank is recycled through a dedicated pipeline network for roadbed maintenance, site dust suppression, and mechanical washing.

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