Road construction sewage treatment device and process

Abstract

The present application relates to sewage treatment technical field, disclose a kind of road construction sewage treatment device and process, comprising: base, the base is fixedly installed with multilayer support, the base one side is provided with purification component, the multilayer support is sequentially fixedly installed with filter tank, neutralization tank, flocculation tank and sedimentation tank from top to bottom, the present application is equipped with push plate by setting baffle in the water inlet end of sedimentation tank, cooperate with the push plate that can lift and adhere pool bottom, utilize baffle to carry out rigid shielding flow limiting to high-speed water, water flow is forced to concentrate and fall to the right side narrow buffer area of push plate, simultaneously, by push plate adhering pool bottom separation forms independent intercommunicating chamber, water inlet impact force is locally limited and dissipates quickly, so that water body enters stationary sedimentation zone with laminar flow overflow mode, avoid the problem that traditional sedimentation tank water inlet directly hits pool bottom, and mud is turned up, causes water body secondary turbidity, guarantee flocculation body stable sedimentation, significantly improve sludge separation precision and overall sewage treatment quality.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a wastewater treatment device and process for road construction. Background Technology

[0002] Generally speaking, a road construction wastewater treatment device is a special equipment used for the collection, purification and recycling of wastewater at road construction sites. During the road construction process, a large amount of construction wastewater containing alkaline impurities, suspended silt and construction waste will be continuously generated. The wastewater needs to be treated in multiple stages to remove water impurities, neutralize excessive alkalinity, settle suspended pollutants, and then be recycled after reaching the standards. In road construction wastewater treatment, sedimentation tank sludge-water separation is a core treatment step. In actual construction wastewater treatment, traditional sedimentation tanks lack buffer and flow-limiting structures at the inlet, allowing high-speed wastewater to directly impact the bottom of the tank. This easily stirs up the already settled flocculent sludge, causing secondary turbidity throughout the water body and resulting in incomplete sludge-water separation. Furthermore, the turbulent and diffuse inlet flow of traditional sedimentation tanks has a large impact range, continuously disturbing the still water and making it difficult for flocculents to settle stably. Some small flocculents remain suspended in the water and cannot settle, significantly reducing the clarity of the effluent. In addition, after long-term operation, a large amount of settled sludge accumulates in the dead corner on the right side of the sedimentation tank. If this dead corner sludge is not cleaned in time, it will gradually decompose, float, and spread, re-polluting the upper layer of clear water and further deteriorating the effluent quality. Therefore, this invention aims to provide a road construction wastewater treatment device and process that can achieve zoned flow stabilization, comprehensive sludge removal without dead corners, and multi-stage high-efficiency purification. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a road construction wastewater treatment device and process to solve the technical problems in the prior art.

[0004] The objective of this invention can be achieved through the following technical solutions: A road construction wastewater treatment device, comprising: A base is provided, on which a multi-layer support is fixedly mounted. A purification component is installed on one side of the base. From top to bottom, a filtration tank, a neutralization tank, a flocculation tank, and a sedimentation tank are sequentially fixedly mounted on the multi-layer support. These tanks are connected sequentially via three water supply pipes, each equipped with a valve. A grating is installed on the top of the filtration tank. The sedimentation tank extends to the outside of the multi-layer support on its left side, and its top is open. The sedimentation tank is connected to the purification component via a water pump assembly. The inlet of the sedimentation tank is located on its right side. A push rod is slidably mounted inside the sedimentation tank, driven by a power source. The push rod is moved and located on the right side of the sedimentation tank. A push plate is slidably installed at one end of the push rod inside the sedimentation tank, and a groove is opened at this end of the push rod. A lifting block is slidably installed in the groove. The lifting block is fixedly connected to the push plate. A drive assembly is provided inside the push rod. The drive assembly is used to drive the lifting block to rise and fall. When the push plate descends, the bottom of the push plate abuts against the bottom plate of the sedimentation tank. When water enters the sedimentation tank, the drive source drives the push rod to move so that the push plate is close to the water inlet of the sedimentation tank. A baffle plate is fixedly installed on the inner wall of the sedimentation tank. The water inlet of the sedimentation tank faces the baffle plate. The distance between the baffle plate and the water inlet is less than the distance between the push plate and the water inlet. The support frame is fixedly installed on the base, and two dosing tanks are provided on the support frame. The two dosing tanks are used to add chemical solutions to the neutralization tank and the flocculation tank, respectively.

[0005] As a further embodiment of the present invention: the driving assembly includes a telescopic rod, a movable frame, an inclined groove, a vertical groove, and a linkage rod. The telescopic rod is slidably installed inside the push rod and is driven to move by an output source. The movable frame is slidably installed inside the sliding groove and is fixedly connected to the telescopic rod. The inclined groove is formed on the movable frame and is arranged at an angle. The horizontal height of the inclined groove near the push plate is lower than the horizontal height of the inclined groove away from the push plate. The vertical groove is formed inside the sliding groove. The linkage rod is fixedly installed on the lifting block and is slidably installed inside the inclined groove and the vertical groove.

[0006] As a further aspect of the present invention: a locking hole is provided on the outer circular surface of the telescopic rod away from the push plate, and a spring groove is provided on the side wall of the push rod away from the push plate. A locking block is slidably installed in the spring groove. The locking block is connected to the spring groove through a second spring. The preload of the second spring causes the locking block to abut against the outer circular surface of the telescopic rod. When the output source drives the telescopic rod to move, it drives the moving frame to move synchronously until the push plate rises away from the bottom plate of the sedimentation tank. At this time, the locking hole and the spring groove are aligned, and the second spring pushes the locking block to insert into the locking hole.

[0007] As a further aspect of the present invention: the end of the telescopic rod away from the push plate is connected to the end of the push rod away from the push plate via a first spring, and the preload of the first spring causes the telescopic rod to move away from the push plate.

[0008] As a further embodiment of the present invention: the purification assembly includes a sand filter tank, a water distribution tank, and a rotating tube. The sand filter tank is fixedly installed on the base and is located on the left side of the multi-layer support. The sand filter tank is filled with filter media for purifying water quality. A water outlet pipe is connected to the bottom of the sand filter tank. The water distribution tank is fixedly installed on the top of the sand filter tank. The water pump pipe assembly is connected to the water distribution tank. The rotating tube is fixedly installed inside the water distribution tank and is rotatably installed inside it. The rotating tube has multiple equally spaced water outlet holes at one end inside the sand filter tank. The rotating tube has a bent design at one end inside the water distribution tank, and the water inlet of the rotating tube is close to the bottom plate of the water distribution tank. The rotating tube is driven to rotate by a power component fixedly installed on the top of the water distribution tank.

[0009] As a further aspect of the present invention: the infusion ends of the two dosing tanks are respectively connected to the two water supply pipes.

[0010] As a further aspect of the present invention: a first stirring rod and a second stirring rod are rotatably installed in the neutralization tank and the flocculation tank respectively; an aeration disc is provided on the bottom plate of the neutralization tank; and an exhaust valve is connected to the top of the neutralization tank.

[0011] A road construction wastewater treatment process, wherein the process is applied to a road construction wastewater treatment device as described above, the process comprising the following steps: Step S1: When the equipment is running, the sewage generated from road construction is first transported to the filtration tank. Large debris in the water body is intercepted and retained as the sewage flows through the screen. The treated sewage is then transported to the neutralization tank through the water pipe. At the same time, acidic neutralizing agent is added using the dosing tank to neutralize and adjust the construction sewage that exceeds the alkalinity standard. Step S2: The neutralized wastewater continues to be transported to the flocculation tank through the water supply pipe. Flocculant is added to the water body with the help of another set of dosing tanks to promote the formation of flocs from fine suspended solids and colloidal particles in the water. The wastewater that has completed the flocculation reaction is then sent to the sedimentation tank through the water supply pipe. Step S3: Before the sewage enters the sedimentation tank, the drive source is started first. The pusher rod drives the pusher plate to move to the side of the sedimentation tank inlet. Then, the drive component controls the pusher plate to descend, so that its bottom end fits against the bottom plate of the sedimentation tank, dividing the tank into a connected structure. After the sewage flows in from the inlet, it first enters the area on the right side of the pusher plate. After the water level gradually rises and overflows the pusher plate, the water flows smoothly to the rest of the sedimentation tank. Step S4: After the sewage has settled sufficiently in the sedimentation tank, the upper clear water is transported by the water pump pipeline to the purification component for deep filtration and purification. The treated water that meets the standards is recycled as construction water for reuse. Step S5: After the day's work is completed, clean the sediment at the bottom of the sedimentation tank. First, control the push plate to move upward so that it is detached from the bottom plate of the sedimentation tank. Then, use the push rod to move the push plate horizontally to the right side of the sedimentation tank. Next, drive the push plate downward again and fit against the bottom of the tank. Then, use the push rod to move the push plate forward to push the sediment accumulated in the tank to the designated area. Finally, extend through the sedimentation tank to the open position outside the multi-layer support to complete the sludge cleaning operation.

[0012] The beneficial effects of this invention are: 1. In this invention, a baffle plate is installed at the inlet of the sedimentation tank in conjunction with a push plate that can be raised and lowered to fit the bottom of the tank. The baffle plate rigidly blocks and limits the flow of high-speed incoming water, forcing the water flow to concentrate and fall into the narrow buffer zone on the right side of the push plate. At the same time, the push plate fits against the bottom of the tank to form independent connected chambers, which locally limits and quickly dissipates the impact force of the incoming water. This allows the water to enter the static sedimentation zone in a laminar overflow manner, avoiding the problem of the inlet water directly rushing to the bottom of the tank and stirring up the bottom mud, causing secondary turbidity of the water. This ensures stable settling of flocs and significantly improves the mud-water separation accuracy and the overall wastewater treatment quality.

[0013] 2. In this invention, the push plate is lifted and suspended in the air by the drive component, detaching from the bottom plate of the sedimentation tank. At the same time, the position of the telescopic rod is locked by the locking block and the lock hole, keeping the push plate in a suspended state. Then, the push rod drives the push plate to move horizontally to the rightmost dead corner area of ​​the sedimentation tank. Then, the locking structure is released, the push plate returns to its original position and falls, adhering to the bottom of the right side of the sedimentation tank. Finally, the push rod pushes the push plate to the left at a uniform speed, pushing the entire sedimentation tank area, including the hard-to-clean sludge accumulated in the right dead corner of the sedimentation tank, to the outer open sewage discharge position. This achieves full coverage and cleaning of the sludge at the bottom of the tank, solving the defect of sludge retention and accumulation at the corners of the sedimentation tank, which affects the sedimentation effect. No manual cleaning is required, effectively ensuring the long-term continuous and stable operation of the equipment.

[0014] 3. In this invention, a multi-stage purification structure is adopted, which combines pre-dosing in the pipeline with a dual-tank stirring and aeration system and a rotating siphon for uniform water distribution. The dosing tank pre-mixes the chemicals in the water delivery pipe, and the coordinated disturbance of the first stirring rod in the neutralization tank, the aeration disc, and the second stirring rod in the flocculation tank significantly improves the uniformity of the mixing reaction between the chemical solution and the wastewater. At the same time, the purification components utilize the rotating pipe siphon to achieve uniform water flow across the entire filter media, significantly improving the depth of wastewater purification and the stability of the effluent, and realizing the recycling of construction wastewater, energy saving, and environmental protection. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall cross-section of the structure in this invention; Figure 3 In this invention Figure 2 Enlarged structural diagram of section A; Figure 4 In this invention Figure 2 Enlarged structural schematic diagram of a portion of the wastewater treatment technology field; Figure 5 This is a schematic diagram of the disassembled push rod and telescopic rod in this invention; Figure 6 This is a schematic diagram of the grid splitting structure in this invention; Figure 7 This is a schematic diagram of the internal structure of the water distribution tank in this invention.

[0017] In the diagram: 1. Base; 2. Multi-layer support; 3. Filter tank; 301. Fixing tank; 4. Neutralization tank; 5. Flocculation tank; 6. Sedimentation tank; 7. Water supply pipe; 701. Valve; 8. Stand; 9. Dosing tank; 10. Sand filter tank; 1001. Outlet pipe; 11. Water pump assembly; 12. Grille; 1201. Fixing claw; 13. First stirring rod; 14. Aeration disc; 15. Air vent valve; 16. Second stirring rod 17. Water baffle; 18. Push plate; 1801. Lifting block; 1802. Linkage rod; 19. Push rod; 1901. Slide groove; 20. Telescopic rod; 21. Moving frame; 22. Inclined groove; 23. Vertical groove; 24. First spring; 25. Locking hole; 26. Spring groove; 27. Second spring; 28. Locking block; 29. ​​Water distribution tank; 30. Rotating pipe; 3001. Water outlet; 31. Cylinder; 32. Filter media. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1-7 As shown, the present invention is a road construction wastewater treatment device, comprising: A base 1 is provided, on which a multi-layer support 2 is fixedly installed. A purification component is provided on one side of the base 1. A filter tank 3, a neutralization tank 4, a flocculation tank 5, and a sedimentation tank 6 are fixedly installed sequentially from top to bottom on the multi-layer support 2. The filter tank 3, neutralization tank 4, flocculation tank 5, and sedimentation tank 6 are connected sequentially by three water supply pipes 7. Each water supply pipe 7 is equipped with a valve 701. A grid 12 is provided on the top of the filter tank 3. The sedimentation tank 6 extends to the outside of the multi-layer support 2 on the left side, and the top of the sedimentation tank 6 is open. The sedimentation tank 6 is connected to the purification component through a water pump pipe assembly 11. The water inlet of the sedimentation tank 6 is located on the right side. A push rod 19 is slidably installed inside the sedimentation tank 6. The push rod 19 is driven by a drive source to move. Located on the right side of the sedimentation tank 6, the push rod 19 has a push plate 18 slidably installed at one end inside the sedimentation tank 6, and a groove 1901 is opened at this end of the push rod 19. A lifting block 1801 is slidably installed in the groove 1901. The lifting block 1801 is fixedly connected to the push plate 18. A drive assembly is provided inside the push rod 19. The drive assembly is used to drive the lifting block 1801 to rise and fall. When the push plate 18 descends, the bottom of the push plate 18 abuts against the bottom plate of the sedimentation tank 6. When water enters the sedimentation tank 6, the drive source drives the push rod 19 to move so that the push plate 18 is close to the water inlet of the sedimentation tank 6. A baffle plate 17 is fixedly installed on the inner wall of the sedimentation tank 6. The water inlet of the sedimentation tank 6 faces the baffle plate 17. The distance between the baffle plate 17 and the water inlet is less than the distance between the push plate 18 and the water inlet. The support frame 8 is fixedly installed on the base 1. Two dosing tanks 9 are provided on the support frame 8. The two dosing tanks 9 are used to add chemical solution to the neutralization tank 4 and the flocculation tank 5, respectively.

[0020] The filter pool 3 has an adapter groove 301 on the top, and the grid 12 is fixedly installed with a frame 1201 around its perimeter. The frame 1201 and the adapter groove 301 slide together to realize the detachable assembly of the grid 12, which facilitates the cleaning and maintenance of the debris intercepted by the grid 12 in the later stage.

[0021] In one embodiment, the driving source can be manually driven or other mechanisms capable of linear reciprocating motion. This embodiment does not impose any specific limitations on these mechanisms.

[0022] The working principle of this invention: During equipment operation, road construction wastewater first enters the filtration tank 3, where large pieces of construction waste and floating debris are intercepted by the screen 12, completing preliminary solid-liquid separation and preventing large impurities from clogging subsequent pipelines and equipment. The pre-filtered wastewater flows into the neutralization tank 4 through the water supply pipe 7, where acidic chemicals are simultaneously added to the corresponding dosing tank 9 to neutralize the highly alkaline water quality of the construction wastewater and solve the problem of excessive pH levels. The neutralized wastewater continues to flow into the flocculation tank 5 through the water supply pipe 7, where another set of dosing tanks 9 adds flocculants to the water, causing fine silt and colloidal particles in the water to clump together and form dense flocs. The flocculated wastewater is then transported to the sedimentation tank. Inside the sedimentation tank 6, the baffle plate 17 corresponding to the inlet of the sedimentation tank 6 can block and limit the high-speed water inflow, directly preventing the water flow from rushing directly to the static area on the left side of the push plate 18, and forcing the water flow to fall completely into the narrow area on the right side of the push plate 18, avoiding the problem of water flow running wildly and spreading throughout the area. At the same time, the push plate 18 is driven by the push rod 19 to precisely stop inside the inlet of the sedimentation tank 6, and forms a closed water flow separation structure against the bottom of the tank, dividing the interior of the sedimentation tank 6 into two independent connected chambers: an inlet buffer zone and a static sedimentation zone. After the sewage rushes in at high speed from the right inlet, under the rigid water blocking and limiting effect of the baffle plate 17, it all converges in the narrow buffer zone on the right side of the push plate 18. Within the flushing area, the impact force of the water flow is locally limited and quickly dissipated, only slightly disturbing the surface water in that area. It will not touch or stir up the already compacted and settled flocculent sludge at the bottom of sedimentation tank 6. As the water continues to flow in, the water level slowly rises and smoothly overflows the top of the push plate 18, overflowing into the large-area static sedimentation zone on the left in a low-velocity, non-impact laminar flow state. This avoids the drawbacks of traditional sedimentation tanks where the influent directly flushes the bottom of the tank and stirs up the mud and water throughout the entire area. From a hydrodynamic perspective, this ensures that the flocculents are not disturbed by the water flow, achieving stable and sufficient gravity sedimentation, significantly improving the mud-water separation accuracy and the clarity of the effluent. After the sewage has settled, the upper clear water flows through the water pump assembly 11. The water is transported to the purification unit, where it is evenly distributed and deeply filtered to obtain compliant water for reuse in construction. After each day's work, the push plate 18 is first raised away from the bottom plate of the sedimentation tank 6 by the drive unit to release the bottom contact limit. Then, the push rod 19 drives the push plate 18 to move horizontally to the rightmost area of ​​the sedimentation tank 6. The push plate 18 is then lowered again to contact the bottom plate of the sedimentation tank 6, so that the push plate 18 is completely in contact with the right bottom dead corner. Finally, the push rod 19 pushes the sludge to the left at a uniform speed to push the sludge accumulated in the entire sedimentation tank 6, including the right inlet dead corner area, to the open position on the outside of the sedimentation tank 6 to complete the sewage discharge and cleaning, thus facilitating manual cleaning of the accumulated sludge.

[0023] like Figures 1-4As shown, in a preferred embodiment of the present invention, the driving assembly includes a telescopic rod 20, a movable frame 21, an inclined groove 22, a vertical groove 23, and a linkage rod 1802. The telescopic rod 20 is slidably installed in the push rod 19 and is driven to move by an output source. The movable frame 21 is slidably installed in the slide groove 1901 and is fixedly connected to the telescopic rod 20. The inclined groove 22 is formed on the movable frame 21 and is arranged at an angle. The horizontal height of the inclined groove 22 near the push plate 18 is lower than the horizontal height of the inclined groove 22 away from the push plate 18. The vertical groove 23 is formed in the slide groove 1901. The linkage rod 1802 is fixedly installed on the lifting block 1801 and is slidably installed in the inclined groove 22 and the vertical groove 23.

[0024] In practical application, the output source drives the telescopic rod 20 to slide horizontally along the inside of the push rod 19, simultaneously driving the fixed end of the movable frame 21 to move in the same direction inside the slide groove 1901. During the movement of the movable frame 21, the inclined groove 22 relative to the linkage rod 1802 slides relative to the linkage rod 1802. In conjunction with the vertically limited groove 23, the linkage rod 1802 is trajectory-constrained, causing the linkage rod 1802 to undergo vertical lifting displacement along the trajectory of the inclined groove 22. This, in turn, drives the lifting block 1801 to slide vertically inside the slide groove 1901, ultimately realizing the lifting adjustment of the push plate 18. The linkage structure of the inclined groove 22 and the vertical groove 23 can accurately convert the horizontal linear motion of the telescopic rod 20 into the vertical lifting motion of the push plate 18.

[0025] like Figures 2-3 As shown, in a preferred embodiment of the present invention, a locking hole 25 is provided on the outer circular surface of the telescopic rod 20 away from the push plate 18, and a spring groove 26 is provided on the side wall of the push rod 19 away from the push plate 18. A locking block 28 is slidably installed in the spring groove 26. The locking block 28 is connected to the spring groove 26 through a second spring 27. The preload of the second spring 27 causes the locking block 28 to abut against the outer circular surface of the telescopic rod 20. When the output source drives the telescopic rod 20 to move, it drives the moving frame 21 to move synchronously until the push plate 18 rises away from the bottom plate of the sedimentation tank 6. At this time, the locking hole 25 is aligned with the spring groove 26, and the second spring 27 pushes the locking block 28 to insert into the locking hole 25.

[0026] In one embodiment, the output source can be manually driven or other mechanisms capable of linear reciprocating motion. This embodiment does not impose any specific limitations on these mechanisms.

[0027] In practical application, when the output source drives the telescopic rod 20 to move horizontally, the push plate 18 is lifted and detached from the bottom plate of the sedimentation tank 6 through the linkage structure. The locking hole 25 on the surface of the telescopic rod 20 is precisely aligned with the spring groove 26. The second spring 27 releases its pre-tightening force, pushing the locking block 28 into the locking hole 25, thereby locking the position of the telescopic rod 20 and the push rod 19. At this time, the push plate 18 remains in a raised and suspended state. The operator can move the push rod 19 horizontally without continuously controlling the state of the telescopic rod 20, thus simplifying the operation process. After the operation is completed, it is only necessary to manually pull the locking block 28 to compress the second spring 27, so that the locking block 28 is disengaged from the locking hole 25, thereby releasing the locking state. The structure is simple and the operation is convenient.

[0028] like Figures 2-4 As shown, in a preferred embodiment of the present invention, the end of the telescopic rod 20 away from the push plate 18 is connected to the end of the push rod 19 away from the push plate 18 via a first spring 24, and the preload of the first spring 24 causes the telescopic rod 20 to move away from the push plate 18.

[0029] In practical application, when the locking block 28 is unlocked and disengaged from the locking hole 25, the first spring 24 releases its elastic potential energy, automatically pulling the telescopic rod 20 to reset and move, simultaneously driving the moving frame 21 to slide. Through the cooperation of the inclined groove 22 and the linkage rod 1802, the push plate 18 is driven to automatically descend, so that the bottom of the push plate 18 is tightly against the bottom plate of the sedimentation tank 6. Through the automatic reset characteristic of the first spring 24, the push plate 18 can be automatically reset to fit against the bottom of the tank without the need for manual secondary adjustment. This ensures that the push plate 18 always slides against the bottom of the tank during the sliding and sludge cleaning process of the push rod 19, avoiding gaps that could lead to sludge residue, and effectively improving the thoroughness of pushing and cleaning the sludge at the bottom of the sedimentation tank 6.

[0030] like Figures 1-7 As shown, in a preferred embodiment of the present invention, the purification assembly includes a sand filter tank 10, a water distribution tank 29, and a rotating tube 30. The sand filter tank 10 is fixedly installed on the base 1 and is located on the left side of the multi-layer support 2. The sand filter tank 10 is filled with filter media 32 for purifying water quality. The bottom end of the sand filter tank 10 is connected to a water outlet pipe 1001. The water distribution tank 29 is fixedly installed on the top end of the sand filter tank 10. The water pump pipe assembly 11 is connected to the water distribution tank 29. A 31 is fixedly installed inside the water distribution tank 29. The rotating tube 30 is rotatably installed inside the 31. The rotating tube 30 has multiple equally spaced water outlet holes 3001 at one end inside the sand filter tank 10. The rotating tube 30 has a bent pipe design at one end inside the water distribution tank 29, and the water inlet of the rotating tube 30 is close to the bottom plate of the water distribution tank 29. The rotating tube 30 is driven to rotate by a power component fixedly installed on the top end of the water distribution tank 29.

[0031] In one embodiment, the power component can be a servo motor, a servo motor or other components that can achieve rotational motion. This embodiment does not impose any specific limitations on this component.

[0032] In practical application, the clear water settled in the sedimentation tank 6 is continuously transported to the water distribution tank 29 through the water pump assembly 11, allowing the water distribution tank 29 to continuously store water. Utilizing the structural characteristics of the upper curved pipe of the rotating pipe 30 close to the bottom of the liquid surface, a siphon effect is formed, continuously drawing water from the water distribution tank 29 into the rotating pipe 30. Simultaneously, the power component drives the rotating pipe 30 to rotate at a uniform speed, and the water is sprayed into the sand filter tank 10 through multiple water outlets 3001 on the side wall of the rotating pipe 30, achieving all-round uniform water distribution. This avoids the problems of concentrated water flow, local overload of filter media 32, and uneven water distribution in traditional fixed water distribution structures. The uniformly dispersed water fully penetrates the filter media 32 from top to bottom, and through the adsorption and sieving effects of the filter media 32, residual fine suspended solids and impurities in the water are thoroughly removed, completing deep purification. The purified water that meets the standards finally flows out from the outlet pipe 1001 for recycling at the construction site, significantly improving the wastewater reuse rate and the stability of the effluent quality.

[0033] like Figures 1-2 As shown, in a preferred embodiment of the present invention, the infusion ends of the two dosing tanks 9 are respectively connected to the two water supply pipes 7.

[0034] In practical application, during the dynamic flow of sewage along the water supply pipe 7, the dosing tank 9 simultaneously adds the corresponding chemical solution into the pipe in a quantitative manner. Utilizing the turbulent flow characteristics of the water, the chemical solution and sewage are preliminarily mixed in the pipe. After entering the corresponding tank, the neutralization and flocculation reactions can be completed quickly. Compared with the fixed-point dosing method in the tank, this improves the uniformity of chemical solution mixing and reaction efficiency, avoids the problems of local accumulation of chemical solution and insufficient reaction, and ensures the treatment effect of alkaline neutralization and flocculation sedimentation.

[0035] like Figures 1-2 As shown, in a preferred embodiment of the present invention, a first stirring rod 13 and a second stirring rod 16 are rotatably installed in the neutralization tank 4 and the flocculation tank 5, respectively. An aeration plate 14 is provided on the bottom plate of the neutralization tank 4, and an exhaust valve 15 is connected to the top of the neutralization tank 4.

[0036] In practical application, the first stirring rod 13 continuously rotates to agitate the water inside the neutralization tank 4, which, together with the airflow from the aeration disc 14, forms a bidirectional disturbance, further enhancing the mixing effect of the acidic solution and alkaline wastewater, achieving all-round uniform neutralization, and avoiding local acid-base imbalance in the water. The aeration disturbance of the aeration disc 14 can effectively prevent the accumulation of silt at the bottom of the neutralization tank 4. The rotation of the second stirring rod 16 can accelerate the fusion of the solution and water inside the flocculation tank 5, promote the rapid aggregation of colloidal particles into dense flocs, and improve flocculation efficiency. During the neutralization reaction, the water is prone to generate trace amounts of gas, and the exhaust valve 15 can discharge excess gas in the tank in real time, balance the gas pressure in the tank, and prevent excessively high gas pressure inside the tank from affecting the stable operation of the equipment.

[0037] Please see Figures 1-7 As shown, the present invention is a road construction wastewater treatment process, which is applied to a road construction wastewater treatment device as described in the above embodiments. The process includes the following steps: Step S1: When the equipment is running, the sewage generated from road construction is first transported to the filter tank 3. The sewage flows through the screen 12 and large debris in the water is intercepted and retained. The treated sewage is transported to the neutralization tank 4 through the water pipe 7. At the same time, acidic neutralizing solution is added using the dosing tank 9 to neutralize and adjust the construction sewage with excessive alkalinity. Step S2: The neutralized wastewater continues to be transported to the flocculation tank 5 through the water supply pipe 7. Flocculant is added to the water body with the help of another set of dosing tanks 9 to promote the formation of flocs from fine suspended solids and colloidal particles in the water. The wastewater that has completed the flocculation reaction is then sent to the sedimentation tank 6 through the water supply pipe 7. Step S3: Before the sewage enters the sedimentation tank 6, the drive source is started first. The push rod 19 drives the push plate 18 to move to the side of the inlet of the sedimentation tank 6. Then, the drive component controls the push plate 18 to descend so that its bottom end fits against the bottom plate of the sedimentation tank 6, dividing the tank body to form a connected structure. After the sewage flows in from the inlet, it first enters the area on the right side of the push plate 18. After the water level gradually rises and overflows the push plate 18, the water flows smoothly to the other areas of the sedimentation tank. Step S4: After the sewage has settled sufficiently in the sedimentation tank 6, the upper clear water is transported by the water pump pipe group 11 to the purification component for deep filtration and purification. The treated water is recycled as construction water for reuse. Step S5: After the day's work is completed, clean the sediment at the bottom of sedimentation tank 6. First, control the push plate 18 to move upward so that it is separated from the bottom plate of sedimentation tank 6. Then, the push rod 19 drives the push plate 18 to move horizontally to the right side of sedimentation tank 6. Then, drive the push plate 18 to move downward again and fit against the bottom of the tank. Next, the push rod 19 drives the push plate 18 to move forward, pushing the sediment accumulated in the tank to the designated area. Finally, it extends through sedimentation tank 6 to the open position outside the multi-layer support 2 to complete the sludge cleaning operation.

[0038] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A road construction wastewater treatment device, characterized in that, include: A base (1) is fixedly mounted on a multi-layer bracket (2). A purification component is provided on one side of the base (1). A filter tank (3), a neutralization tank (4), a flocculation tank (5), and a sedimentation tank (6) are fixedly mounted on the multi-layer bracket (2) from top to bottom. The filter tank (3), neutralization tank (4), flocculation tank (5), and sedimentation tank (6) are connected in sequence through three water supply pipes (7). Each water supply pipe (7) is equipped with a valve (701). A grid (12) is provided on the top of the filter tank (3). The sedimentation tank (6) extends to the outside of the multi-layer bracket (2) on the left side. The top of the sedimentation tank (6) is open. The sedimentation tank (6) is connected to the purification component through a water pump pipe group (11). The water inlet of the sedimentation tank (6) is located on the right side. A push rod (19) is slidably installed in the sedimentation tank (6). The push rod (19) is driven by a drive source to move. 19) Located on the right side of the sedimentation tank (6), the push rod (19) has a push plate (18) slidably installed at one end inside the sedimentation tank (6), and a groove (1901) is provided at this end of the push rod (19). A lifting block (1801) is slidably installed in the groove (1901). The lifting block (1801) is fixedly connected to the push plate (18). A drive assembly is provided inside the push rod (19), and the drive assembly is used to drive the lifting block (1801). When the push plate (18) descends, the bottom of the push plate (18) abuts against the bottom plate of the sedimentation tank (6). When the sedimentation tank (6) is filled with water, the drive source drives the push rod (19) to move so that the push plate (18) approaches the inlet of the sedimentation tank (6). A baffle plate (17) is fixedly installed on the inner wall of the sedimentation tank (6). The inlet of the sedimentation tank (6) faces the baffle plate (17). The distance between the baffle plate (17) and the inlet is less than the distance between the push plate (18) and the inlet. A support frame (8) is fixedly installed on a base (1). Two dosing tanks (9) are provided on the support frame (8). The two dosing tanks (9) are used to add chemical solution to the neutralization tank (4) and the flocculation tank (5), respectively.

2. The road construction wastewater treatment device according to claim 1, characterized in that, The drive assembly includes a telescopic rod (20), a movable frame (21), an inclined groove (22), a vertical groove (23), and a linkage rod (1802). The telescopic rod (20) is slidably installed in the push rod (19) and is driven to move by an output source. The movable frame (21) is slidably installed in the sliding groove (1901) and is fixedly connected to the telescopic rod (20). The inclined groove (22) is formed on the movable frame (21). The inclined groove (22) is arranged at an angle, and the horizontal height of the end of the inclined groove (22) near the push plate (18) is lower than the horizontal height of the end of the inclined groove (22) away from the push plate (18). The vertical groove (23) is opened in the sliding groove (1901). The linkage rod (1802) is fixedly installed on the lifting block (1801), and the linkage rod (1802) is slidably installed in the inclined groove (22) and in the vertical groove (23).

3. The road construction wastewater treatment device according to claim 2, characterized in that, A locking hole (25) is provided on the outer circular surface of the telescopic rod (20) away from the push plate (18). A spring groove (26) is provided on the side wall of the push rod (19) away from the push plate (18). A locking block (28) is slidably installed in the spring groove (26). The locking block (28) is connected to the spring groove (26) through a second spring (27). The preload of the second spring (27) causes the locking block (28) to abut against the outer circular surface of the telescopic rod (20). When the output source drives the telescopic rod (20) to move, it drives the moving frame (21) to move synchronously until the push plate (18) rises away from the bottom plate of the sedimentation tank (6). At this time, the locking hole (25) is aligned with the spring groove (26), and the second spring (27) pushes the locking block (28) to insert into the locking hole (25).

4. A road construction wastewater treatment device according to claim 3, characterized in that, The end of the telescopic rod (20) away from the push plate (18) is connected to the end of the push rod (19) away from the push plate (18) via a first spring (24). The preload of the first spring (24) causes the telescopic rod (20) to move away from the push plate (18).

5. A road construction wastewater treatment device according to claim 1, characterized in that, The purification assembly includes a sand filter tank (10), a water distribution tank (29), and a rotating pipe (30). The sand filter tank (10) is fixedly installed on the base (1) and is located on the left side of the multi-layer support (2). The sand filter tank (10) is filled with filter media (32) for purifying water quality. The bottom of the sand filter tank (10) is connected to a water outlet pipe (1001). The water distribution tank (29) is fixedly installed on the top of the sand filter tank (10). The water pump assembly (11) is connected to the water distribution tank (29). The water distribution tank (29) is fixedly installed with (31), and the rotating tube (30) is rotatably installed in (31). The rotating tube (30) is located in the sand filter tank (10) with a plurality of equally spaced water outlet holes (3001) at one end. The rotating tube (30) is located in the water distribution tank (29) with a bent tube design at one end, and the water inlet of the rotating tube (30) is close to the bottom plate of the water distribution tank (29). The rotating tube (30) is driven to rotate by a power component fixedly installed at the top of the water distribution tank (29).

6. A road construction wastewater treatment device according to claim 1, characterized in that, The infusion ends of the two dosing tanks (9) are respectively connected to the two water pipes (7).

7. A road construction wastewater treatment device according to claim 1, characterized in that, The neutralization tank (4) and the flocculation tank (5) are respectively rotatably installed with a first stirring rod (13) and a second stirring rod (16). The bottom plate of the neutralization tank (4) is provided with an aeration plate (14), and the top of the neutralization tank (4) is connected to an exhaust valve (15).

8. A road construction wastewater treatment process, characterized in that, The process is applied to a road construction wastewater treatment device as described in any one of claims 1-7, and the process includes the following steps: Step S1: When the equipment is running, the sewage generated from road construction is first transported to the filter tank (3). The sewage flows through the screen (12) and large debris in the water is intercepted and retained. The treated sewage is transported to the neutralization tank (4) through the water pipe (7). At the same time, acidic neutralizing agent is added using the dosing tank (9) to neutralize and adjust the construction sewage with excessive alkalinity. Step S2: The neutralized wastewater continues to be transported to the flocculation tank (5) through the water pipe (7). Flocculant is added to the water body through another set of dosing tanks (9) to promote the formation of flocs from fine suspended solids and colloidal particles in the water. The wastewater that has completed the flocculation reaction is then sent to the sedimentation tank (6) through the water pipe (7). Step S3: Before the sewage enters the sedimentation tank (6), the drive source is started first, and the pusher (18) is moved to the side of the inlet of the sedimentation tank (6) by the pusher (19). Then, the pusher (18) is lowered by the drive component so that its bottom end is attached to the bottom plate of the sedimentation tank (6) to divide the tank body into a connected structure. After the sewage flows in from the inlet, it first enters the area on the right side of the pusher (18). After the water level gradually rises and overflows the pusher (18), the water flows smoothly to the other areas of the sedimentation tank. Step S4: After the sewage has settled sufficiently in the sedimentation tank (6), the upper layer of clear water is transported by the water pump pipe group (11) to the purification component for deep filtration and purification. The treated water is recycled as construction water for reuse. Step S5: After the day's work is completed, clean the sediment at the bottom of the sedimentation tank (6). First, control the push plate (18) to move upward so that it is separated from the bottom plate of the sedimentation tank (6). Then, the push rod (19) drives the push plate (18) to move horizontally to the right side of the sedimentation tank (6). Then, drive the push plate (18) to move downward again and fit against the bottom of the tank. Next, the push rod (19) drives the push plate (18) to move forward and push the sediment accumulated in the tank to the designated area. Finally, the sediment is extended through the sedimentation tank (6) to the open position outside the multi-layer support (2) to complete the sludge cleaning operation.

Images