A multi-stage filtering treatment device for construction site sewage

Abstract

The application discloses a kind of construction site sewage multistage filtration treatment equipment, comprising: support platform;Silt collection tank is set to the just below support platform, for receiving sedimented silt;Sedimentation part is set to the below support platform, and located the just above silt collection tank, to separate the silt and oil stain in sewage with sedimentation;Oil stain cleaning part, to clean the oil stain of upper layer stationary of sedimentation part, one side of the sedimentation part is provided with oil stain collection tank, and the oil stain collection tank is used to receive cleaned oil stain;Silt discharge part is set to the bottom of sedimentation part, to discharge the silt of the bottom of sedimentation part to silt collection tank.The application, it is realized to filter screen periodically or controllably self-cleaning, prevent filter screen from being blocked and affect normal treatment of sewage, also reduce artificial cleaning frequency, save time and effort, it is convenient to install and disassemble filter screen, convenient for later maintenance or replacement.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a multi-stage filtration treatment device for construction site wastewater. Background Technology

[0002] Wastewater treatment is a technical system that purifies water bodies using physical, chemical, and biological methods to meet discharge or reuse standards. It is mainly divided into two categories: industrial wastewater treatment and domestic wastewater treatment. The treatment process includes three levels: primary treatment removes suspended solids using physical methods such as screens and sedimentation; secondary treatment uses biological technologies such as activated sludge and biofilm processes to degrade organic matter; and tertiary treatment uses technologies such as membrane separation and ion exchange for deep purification.

[0003] Currently, construction site wastewater, including domestic sewage and construction wastewater, located far from municipal pipe networks, contains a lot of silt, floating oil, plastics, fibers, and debris. Furthermore, construction site wastewater lacks centralized treatment through municipal pipe networks. However, it also suffers from the following shortcomings: it is prone to sedimentation and clogging, affecting treatment; it easily entangles pumps and filters; after a period of wastewater treatment, filters are easily clogged due to debris accumulation, affecting treatment efficiency; traditional filters are inconvenient to clean, generally requiring a long cleaning cycle, affecting normal wastewater filtration and treatment, and cleaning is also very laborious and inconvenient. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings mentioned above by providing a multi-stage filtration treatment device for construction site wastewater. This device enables regular or controllable self-cleaning of the filter screen, preventing clogging that could affect the normal treatment of wastewater. It also reduces the frequency of manual cleaning, saving time and effort, and facilitates the installation and disassembly of the filter screen for easy maintenance or replacement in the future.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a multi-stage filtration treatment device for construction site wastewater, comprising: Support platform; The sediment collection box is located directly below the support platform and is used to collect settled sediment. The sedimentation section is located below the support platform and directly above the sediment collection box, and is used to settle and separate sediment and oil from the wastewater. The oil stain cleaning unit includes a movable component located directly below the support platform and a cleaning component located at the bottom of the movable component, for cleaning the stationary oil stains on the upper layer of the sedimentation unit. An oil stain collection box is provided on one side of the sedimentation unit for collecting the cleaned oil stains. A sediment discharge section is located at the bottom of the sedimentation section to discharge sediment from the bottom of the sedimentation section to a sediment collection box. The sedimentation section is equipped with a connecting piece. An impurity cleaning section is located on one side of the sedimentation section. The impurity cleaning section is used to clean up debris in the water. The connecting member is used to draw water from the sedimentation section to the impurity cleaning section. A backflush unit is installed on the impurity cleaning section to discharge the waste on the impurity cleaning section; The waste collection bin is located on one side of the waste removal section and is used to collect the waste discharged from the waste removal section. The storage tank, located on one side of the impurity cleaning section, is used to collect filtered water for irrigating the lawn.

[0006] Furthermore, the sedimentation section includes a sedimentation tank located in the middle of the support platform, and a wastewater inlet pipe located on the sedimentation tank; It also includes a funnel-shaped sedimentation element located at the bottom of the sedimentation tank.

[0007] Furthermore, the movable component includes a fixed box disposed at the bottom of the support platform, a lead screw disposed inside the fixed box, and a drive unit disposed at the end of the fixed box for driving the lead screw; It also includes a lead screw block mounted on the lead screw, and a connecting plate mounted at the bottom of the lead screw block; It also includes symmetrically arranged sliding grooves at the bottom of the support platform and telescopic rods arranged one-to-one in the sliding grooves, with the connecting plate and the telescopic rods fixedly connected.

[0008] Furthermore, the cleaning component includes an oil stain cleaning dish disposed at the bottom of the telescopic rod and a discharge pipe disposed at the bottom of the oil stain cleaning dish, wherein an electrically controlled valve is provided inside the discharge pipe.

[0009] Furthermore, the sediment discharge section includes a fixed cylinder disposed at the bottom of the funnel-shaped sedimentation piece and a driven gear rotatably disposed on the fixed cylinder, the fixed cylinder being divided into upper and lower parts; It also includes a connecting U-shaped frame disposed on the fixed cylinder and a connecting rod disposed inside the driven gear, wherein the end of the connecting rod is provided with a rotating shaft located in the axial direction of the fixed cylinder; It also includes a spiral conveying blade mounted on the rotating shaft, and a driving gear mounted on the driven gear; It also includes a drive unit located at the bottom of the drive gear, and a support plate located at the bottom of the drive unit for connecting the sediment collection box.

[0010] Furthermore, the connecting component includes a connecting pipe disposed on one side of the sedimentation tank and a pump body disposed on the connecting pipe.

[0011] Furthermore, the impurity cleaning section includes a cleaning box disposed on one side of the sedimentation section and support pillars symmetrically disposed on the top of the waste collection box; It also includes rotating columns installed in the support pillars and cleaning boxes respectively, and a conveyor belt installed on the rotating columns; It also includes baffles installed on the conveyor belt and filter holes opened on the conveyor belt; It also includes a baffle block installed inside the cleaning box to fit the baffle, and a drain pipe installed on the filter side of the cleaning box.

[0012] Furthermore, the support column is equipped with a drive unit for driving the rotating column, the drive unit being an electric motor or motor, and the cleaning box is equipped with a level gauge.

[0013] Furthermore, the recoil component includes a recoil box disposed on the conveyor belt, and the recoil box is fixedly installed with the support column; It also includes a backflush pipe installed on the backflush box, and a high-pressure pump installed in the middle of the backflush pipe and fixedly installed with the support column.

[0014] The beneficial effects of this invention are reflected in: 1. This invention employs a three-stage progressive filtration process: gravity sedimentation for silt removal, automatic scraping for oil removal, and precision impurity removal via filter screen. Addressing the challenges of large volumes of silt, floating oil, and numerous impurities in construction site wastewater, this invention precisely removes different types of pollutants step-by-step. First, a funnel-type sedimentation structure allows for rapid settling of large silt particles. Then, a mobile cleaning structure thoroughly removes surface oil. Finally, a conveyor belt with filter holes intercepts fine plastics, fibers, and debris. This multi-stage purification significantly improves the purity of construction site wastewater treatment, ensuring stable and compliant effluent quality that meets the standards for irrigation reuse at construction sites.

[0015] 2. This invention, by adding an independent backwash component, uses a high-pressure pump in conjunction with the backwash box to achieve reverse high-pressure flushing of the filter screen. The cleaning program can be started on a timed or as-needed basis to automatically flush away debris clogging the filter holes. Combined with the cyclical rotation of the conveyor belt, it achieves full-area cleaning, fundamentally avoiding filter screen clogging and pump entanglement failures, continuously ensuring sewage treatment efficiency, and greatly improving the stability of equipment operation.

[0016] 3. This invention integrates automatic oil removal, automatic sludge discharge, automatic impurity filtration, automatic filter cleaning, and automatic water storage and reuse functions. The entire process eliminates the need for frequent manual inspections and cleaning of debris and sludge. It also eliminates the tedious manual operations of traditional equipment, such as oil scooping, sand removal, and filter cleaning, greatly reducing the frequency of manual intervention, saving time and effort, and effectively reducing the manual operating costs of construction site sewage treatment. It is suitable for the unmanned and routine sewage treatment needs of construction sites.

[0017] 4. This invention features modular and partitioned arrangement of functional components, with the support platform, sedimentation section, cleaning section, and storage box being independently assembled. The structure is well-organized and easy to assemble and disassemble. The filter conveyor belt, backwash assembly, and sediment conveying structure are all detachable assembly structures. When parts are worn or damaged in the future, they can be disassembled and replaced individually without disassembling the entire machine. This significantly reduces the cost of later maintenance, repair, and replacement of the equipment, and extends the service life of the equipment.

[0018] 5. This invention is specifically designed for special scenarios such as remote construction sites, field construction sites, and temporary projects without municipal pipe networks. It can independently purify sewage without connecting to municipal sewage pipes. The purified water is centrally stored and can be directly used for construction site water use scenarios such as lawn irrigation, site dust suppression, and equipment cleaning. It realizes the recycling and resource utilization of sewage, reduces the amount of tap water used on construction sites, reduces construction energy consumption, is green and environmentally friendly, and has extremely strong scenario adaptability.

[0019] 6. This invention adopts a mechanical linkage automated structure, combined with liquid level linkage control and controllable start / stop design of electric control valves. The operation logic is precise, avoiding equipment failure caused by human operation errors. The spiral sand feeding structure can quantitatively discharge sand, preventing the accumulation and caking of mud and sand. The limit movement structure ensures that oil stain cleaning is not deviated and backflushing cleaning is thorough. The overall equipment operates smoothly, with a failure rate far lower than traditional simple filtration equipment, and can operate continuously and stably for a long time. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural view of the present invention; Figure 2 This is a three-dimensional structural view of the support platform and the moving component of the present invention; Figure 3 This is a three-dimensional structural view of the sediment collection box and the movable component of the present invention; Figure 4 This is a three-dimensional structural view of the sedimentation section and the sediment discharge section of the present invention; Figure 5 This is a three-dimensional structural cross-sectional view of the sedimentation section and the sediment discharge section of the present invention; Figure 6 This is a three-dimensional structural view of the impurity cleaning unit and the waste collection bin of the present invention; Figure 7 This is a three-dimensional structural cross-sectional view of the impurity cleaning unit and the garbage collection bin of the present invention; Figure 8 This is a perspective view of the impurity cleaning unit and the waste collection bin of the present invention from another angle. Figure 9 For the present invention Figure 5 A magnified view of the portion shown in section A.

[0021] In the picture: 1. Support platform; 2. Sediment collection box; 3. Sedimentation section; 31. Sedimentation tank; 32. Wastewater inlet pipe; 33. Funnel-shaped sedimentation unit; 4. Oil Stain Cleaning Department; 41. Moving part; 411. Fixed box; 412. Lead screw; 413. Drive unit; 414. Lead block; 415. Connecting plate; 416. Slide body; 417. Telescopic rod; 42. Cleaning components; 421. Oil stain cleaning dish; 422. Discharge pipe; 423. Electrically controlled valve; 5. Oil stain collection box; 6. Sediment discharge section; 61. Fixed cylinder; 62. Driven gear; 63. Connecting U-shaped frame; 64. Connecting rod; 65. Rotating shaft; 66. Spiral conveyor blade; 67. Drive gear; 68. Driving component; 69. Support plate; 7. Connecting component; 71. Pump body; 72. Connecting pipe; 8. Impurity cleaning section; 81. Cleaning box; 82. Support column; 83. Rotating column; 84. Conveyor belt; 85. Filter hole; 86. Baffle; 87. Stop block; 88. Drain pipe; 9. Backflush components; 91. Backflush box; 92. Backflush pipe; 93. High-pressure pump; 10. Storage box; 11. Trash collection bins. Detailed Implementation

[0022] 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 a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. 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.

[0023] Please see Figure 1-9 This invention discloses a multi-stage filtration and treatment device for construction site sewage. It addresses the industry pain points of high mud and sand content, floating oil, plastic fiber debris, easy clogging of filter screens, cumbersome manual cleaning, and low treatment efficiency in domestic sewage and construction wastewater at construction sites. Through an integrated structure of multi-stage layered treatment, automatic oil cleaning, quantitative mud and sand discharge, and automatic backwashing cleaning of filter screens, it achieves automated and efficient purification treatment of construction site sewage. The purified water can be directly reused for irrigation of construction site lawns, which is energy-saving and environmentally friendly. include: Support platform 1 adopts a steel frame structure, which is high in strength and corrosion resistant, and is suitable for complex outdoor working environments on construction sites. The sediment collection box 2 is located directly below the support platform 1 and is used to collect the sediment. The sediment collection box 2 adopts a detachable drawer-type structure, which makes it easy to remove and clean the accumulated sediment later. The sedimentation section 3 is located below the support platform 1 and directly above the sediment collection box 2. It is used to settle and separate the sediment and oil in the sewage, forming a sediment settling and collection structure with corresponding upper and lower sections. The oil stain cleaning unit 4 includes a movable part 41 located directly below the support platform 1 and a cleaning part 42 located at the bottom of the movable part 41, which is used to clean the static oil stains on the upper layer of the sedimentation unit 3. An oil stain collection box 5 is provided on one side of the sedimentation unit 3, which is used to collect the cleaned oil stains. The sediment discharge section 6 is located at the bottom of the sedimentation section 3 and is used to discharge the sediment at the bottom of the sedimentation section 3 to the sediment collection box 2. The sedimentation section 3 is provided with a connecting piece 7. Impurity cleaning section 8 is located on one side of sedimentation section 3. Impurity cleaning section 8 is used to clean up garbage in the water. Connecting member 7 is used to draw water from sedimentation section 3 to impurity cleaning section 8. The backflush member 9 is provided on the impurity cleaning section 8 to discharge the waste on the impurity cleaning section 8; The garbage collection bin 11 is located on one side of the impurity cleaning section 8 and is used to collect the garbage discharged from the impurity cleaning section 8. Storage tank 10, located on one side of impurity cleaning section 8, is used to collect filtered water for irrigating the lawn.

[0024] In a specific embodiment, the sedimentation section 3 includes a sedimentation tank 31 located in the middle of the support platform 1, and a sewage inlet pipe 32 located on the sedimentation tank 31; It also includes a funnel-shaped sedimentation component 33 set at the bottom of the sedimentation tank 31. The mixed sewage from the construction site is introduced into the sedimentation tank 31 at a uniform speed through the sewage inlet pipe 32. The bottom of the sedimentation tank 31 is integrally formed with a funnel-shaped sedimentation component 33. The funnel structure gradually narrows from top to bottom. After the sewage enters, the flow rate slows down, and the heavier silt particles settle quickly under the action of gravity. They converge along the inner wall of the funnel to the bottom fixed cylinder 61, realizing the initial separation of silt and water. Oil and light floating matter are suspended in the upper layer of the water, realizing the stratified distribution of silt, oil and clean water, providing a basis for subsequent graded cleaning.

[0025] In one embodiment, the movable component 41 includes a fixed box 411 disposed at the bottom of the support platform 1, a lead screw 412 disposed in the fixed box 411, and a drive part 413 disposed at the end of the fixed box 411 for driving the lead screw 412. It also includes a lead block 414 disposed on the lead screw 412, and a connecting plate 415 disposed at the bottom of the lead block 414; It also includes a sluice box 416 symmetrically arranged at the bottom of the support platform 1, and telescopic rods 417 arranged one-to-one in the sluice box 416, with the connecting plate 415 fixedly connected to the telescopic rods 417.

[0026] In a specific embodiment, the cleaning component 42 includes an oil stain cleaning dish 421 disposed at the bottom of the telescopic rod 417 and a discharge pipe 422 disposed at the bottom of the oil stain cleaning dish 421. An electrically controlled valve 423 is installed inside the discharge pipe 422. The drive unit 413 uses a stepper motor, which can precisely control the forward and reverse rotation, start and stop, and movement stroke of the lead screw 412. A lead block 414 is threaded onto the lead screw 412, and a connecting plate 415 is fixed to the bottom of the lead block 414. Simultaneously, two sets of sliding grooves 416 are symmetrically installed at the bottom of the support platform 1. A telescopic rod 417 is slidably mounted inside the sliding groove 416. The bottom end of the telescopic rod 417 is fixed to the connecting plate 415. The telescopic rod 417 is an electric push rod, and a synchronous corrector is installed on the telescopic rod 417. The telescopic rod 417 is connected to the sliding groove 416 via a synchronous corrector. The limiting mechanism of 417 restricts the screw block 414 to move only in a horizontal straight line, preventing shaking and deviation and ensuring cleaning accuracy. The oil stain cleaning dish 421 adopts a shallow groove arc structure, which is set to fit the liquid level inside the sedimentation tank 31. During daily settling, the oil stains float on the surface of the water. When cleaning is required, the drive unit 413 starts and drives the screw 412 to rotate, which drives the screw block 414, the connecting plate 415 and the oil stain cleaning dish 421 to move horizontally at a uniform speed, scraping and collecting the floating oil stains on the liquid surface. After the oil stains are collected, the dish moves to a position above the oil stain collection tank 5 and opens the electric control valve 423 on the discharge pipe 422. Under the action of gravity, the oil stains flow into the oil stain collection tank 5 through the discharge pipe 422, completing the automatic collection of oil stains without manual intervention.

[0027] In one embodiment, the sediment discharge section 6 includes a fixed cylinder 61 disposed at the bottom of the funnel-shaped sedimentation member 33, and a driven gear 62 rotatably disposed on the fixed cylinder 61. The fixed cylinder 61 is divided into upper and lower parts. It also includes a connecting U-shaped frame 63 disposed on the fixed cylinder 61, and a connecting rod 64 disposed inside the driven gear 62, the end of the connecting rod 64 being provided with a rotating shaft 65 located in the axial direction of the fixed cylinder 61; It also includes a spiral conveying blade 66 disposed on the rotating shaft 65, and a driving gear 67 disposed on the driven gear 62; It also includes a drive unit 68 located at the bottom of the drive gear 67, and a support plate 69 located at the bottom of the drive unit 68 for connecting the sediment collection box 2. The driven gear 62 has an axial rotating shaft 65 fixed inside by a connecting rod 64, and a spiral conveying blade 66 fixed outside the rotating shaft 65. The spiral conveying blade 66 is adapted to the inner diameter of the fixed cylinder 61. The drive unit 68 is an electric motor. When working, the drive unit 68 drives the drive gear 67 to rotate, and drives the driven gear 62 to rotate as a whole through gear meshing, which in turn drives the rotating shaft 65 and the spiral conveying blade 66 to rotate. By spiral pushing, the sediment settled at the bottom of the funnel is uniformly and quantitatively transported to the sediment collection box 2 below, avoiding sediment accumulation and caking, and blocking the outlet. At the same time, it realizes automatic sediment cleaning without manual digging.

[0028] In a specific embodiment, the connecting component 7 includes a connecting pipe 72 disposed on one side of the sedimentation tank 31 and a pump body 71 disposed on the connecting pipe 72. The upper clear water after the initial separation of mud, sand and oil is transported to the impurity cleaning section 8 through the connecting component 7. The pump body 71 is a corrosion-resistant sewage pump that can extract sewage containing trace amounts of fine impurities. The two ends of the connecting pipe 72 are respectively connected to the upper clear water area of ​​the sedimentation tank 31 and the inside of the cleaning tank 81 to ensure stable sewage transportation.

[0029] In one embodiment, the impurity cleaning section 8 includes a cleaning box 81 disposed on one side of the sedimentation section 3 and support columns 82 symmetrically disposed on the top of the waste collection box 11. It also includes a rotating column 83 respectively installed in the support column 82 and the cleaning box 81, and a conveyor belt 84 installed on the rotating column 83; It also includes a baffle 86 disposed on the conveyor belt 84, and a filter hole 85 formed on the conveyor belt 84; It also includes a baffle 87 installed inside the cleaning box 81 to fit the baffle 86, and a drain pipe 88 installed on the filter side of the cleaning box 81. The impurity cleaning section 8 serves as a precision filtration unit. The garbage collection box 11 is fixed to the bottom of the outer side of the cleaning box 81. The surface of the conveyor belt 84 is evenly and densely ventilated with filter holes 85, with a hole diameter of 2-5mm, which can effectively intercept impurities such as plastic debris, fibers, dead branches, and small gravel, while ensuring that water passes through quickly. Multiple baffles 86 are fixed at equal intervals on the outer side of the conveyor belt 84. The baffles 86 are perpendicular to the surface of the conveyor belt 84 and can effectively attach and carry floating impurities, preventing impurities from drifting with the water flow. The baffle 87 is welded inside the cleaning box 81. The baffle 87 slides and fits with the baffle 86, which can block the backflow of impurities and improve the filtration stability. A level gauge is installed on the side wall of the cleaning box 81 to monitor the water level in the box in real time. When the water level reaches the set threshold, the conveyor belt will automatically start running and the backwash cleaning program will be activated.

[0030] In a specific embodiment, the support column 82 is provided with a drive unit for driving the rotating column 83. The drive unit is an electric motor or motor, and the cleaning box 81 is provided with a level gauge.

[0031] In one embodiment, the recoil member 9 includes a recoil box 91 disposed on the conveyor belt 84, and the recoil box 91 is fixedly installed with the support column 82; It also includes a backwash pipe 92 installed on the backwash box 91, and a high-pressure pump 93 installed in the middle of the backwash pipe 92 and fixedly installed with the support column 82. The backwash component 9 is mounted on the inner side of the conveyor belt 84. The backwash box 91 is fixed to the inner side of the support column 82 and is set to fit the filter surface of the conveyor belt 84. The backwash box 91 has a notch on the side facing the conveyor belt 84. The backwash pipe 92 is connected to the high-pressure pump 93. The high-pressure pump 93 is connected to the clean water source of the construction site. After long-term filtration operation, the filter holes 85 of the conveyor belt 84 are easily blocked by fine fibers and debris. At this time, the high-pressure pump 93 is started, and the high-pressure water flow is delivered to the backwash box 91 through the backwash pipe 92 to backwash the filter holes 85 of the conveyor belt 84, washing away the blocked debris and residual garbage. At the same time, the conveyor belt 84 slowly rotates in a cycle to achieve all-round backwash cleaning of the entire filter screen without dead angles. The garbage that falls off falls into the garbage collection box 11 below as the conveyor belt 84 rotates, completing the automatic slag discharge and self-cleaning operation.

[0032] After being precisely filtered and backwashed by the impurity cleaning section 8, the clean water is transported to the storage tank 10 through the drain pipe 88 at the bottom of the cleaning tank 81. The storage tank 10 can store the purified water for a long time. The stored clean water can be directly used for irrigation of green plants on construction sites and dust suppression spraying, realizing the resource reuse of wastewater.

[0033] Throughout the entire operation, all components work together. First, the sedimentation section 3 separates the mud and oil into layers. Then, the oil cleaning section 4 and the mud and sand discharge section 6 clean the oil and settled mud and sand respectively. Finally, the impurity cleaning section 8 completes the filtration of fine impurities and automatic backwashing cleaning of the filter screen. The entire process is automated and requires no frequent manual intervention or cleaning.

[0034] During use, check the overall assembly status of the equipment, confirming that the support platform 1 is firmly fixed, all connecting pipes 72 are sealed without leakage, and the transmission structure such as gears, lead screws 412, and conveyor belts 84 is free from jamming and looseness. Check that the mud and sand collection box 2, oil sludge collection box 5, and garbage collection box 11 are installed in place without offset, empty, or accumulated debris. Check that the circuit connections of the high-pressure pump 93, pump body 71, drive motor, and electric control valve 423 are normal, the level gauge is sensitive, and confirm that all electrical control components are in the initial standby state with no fault alarms. After completing the start-up preparation, turn on the main switch of the equipment. The domestic sewage and construction sewage to be treated at the construction site will pass through the sewage system. The wastewater is uniformly introduced into the sedimentation tank 31 through the inlet pipe 32. Within the sedimentation tank 31, the wastewater remains still and flows slowly. Large particles of silt settle down to the bottom fixed cylinder 61 under the influence of gravity along the funnel-shaped sedimentation piece 33. Oil and light floating matter remain suspended on the surface of the water, completing the initial stratification separation. The equipment has a preset timed cleaning program. When the sedimentation time reaches the set time, the drive unit 413 starts, driving the lead screw 412 to rotate and causing the oil cleaning dish 421 to move laterally at a uniform speed, scraping and collecting the floating oil on the surface. After the oil cleaning dish 421 moves above the oil collection tank 5, the electric control valve 423 automatically opens, and the oil is discharged into the collection tank 5. Once the oil is discharged... After completion, the electric control valve 423 closes, the oil stain cleaning dish 421 resets and stands by. After the sediment settles and accumulates to a certain amount, the drive unit 68 starts, driving the spiral conveyor blade 66 to rotate through gear meshing, pushing the sediment at the bottom to the sediment collection box 2 below at a uniform speed for quantitative sediment discharge, avoiding sediment accumulation and blockage of the pipeline. After the sediment discharge is completed, the machine automatically stops and stands by. The upper layer of clear water after sedimentation is driven by the pump body 71 and transported to the cleaning box 81 through the connecting pipe 72. When the sewage flows through the conveyor belt 84, the filter hole 85 allows water to pass through and intercepts the sewage, and the baffle 86 intercepts solid impurities such as plastic, fiber, and debris. The clean water passes through the filter hole 85 and then... The water flows into the storage tank 10 through the drain pipe 88. When the equipment has been running for a preset time or the level gauge detects a decrease in filtration efficiency, the backwashing program is automatically started. The high-pressure pump 93 works, and the high-pressure water flows through the backwash box 91 to flush the filter holes 85 of the conveyor belt 84 in the opposite direction. At the same time, the conveyor belt 84 slowly circulates, cleaning the filter screen of debris from all directions. The debris washed off falls into the waste collection bin 11 with the conveyor belt 84. After cleaning, the system automatically resets and continues the filtration operation. The purified water in the storage tank 10 can be directly extracted for lawn irrigation, site dust suppression, equipment cleaning, etc., according to the needs of the construction site, realizing the resource utilization of wastewater.

[0035] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] Additionally, "multiple" refers to two or more.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage filtration and treatment device for construction site wastewater, characterized in that, include: Support platform (1); The sediment collection box (2) is located directly below the support platform (1) and is used to collect the sediment. The sedimentation section (3) is located below the support platform (1) and directly above the sediment collection box (2) to settle and separate the sediment and oil in the sewage. The oil stain cleaning unit (4) includes a movable part (41) located directly below the support platform (1) and a cleaning part (42) located at the bottom of the movable part (41) for cleaning the static oil stains on the upper layer of the sedimentation unit (3). An oil stain collection box (5) is provided on one side of the sedimentation unit (3) for collecting the cleaned oil stains. The sediment discharge section (6) is located at the bottom of the sedimentation section (3) to discharge the sediment at the bottom of the sedimentation section (3) to the sediment collection box (2). The sedimentation section (3) is provided with a connecting piece (7). Impurity cleaning section (8) is provided on one side of sedimentation section (3). The impurity cleaning section (8) is used to clean up garbage in the water. The connecting member (7) is used to draw water from sedimentation section (3) to impurity cleaning section (8). A backflush member (9) is provided on the impurity cleaning section (8) to discharge the waste on the impurity cleaning section (8); A garbage collection bin (11) is set on one side of the impurity cleaning section (8) and is used to collect the garbage discharged from the impurity cleaning section (8); Storage box (10), located on one side of impurity cleaning section (8), is used to collect filtered water for irrigating lawn.

2. The multi-stage filtration treatment equipment for construction site wastewater according to claim 1, characterized in that: The sedimentation section (3) includes a sedimentation tank (31) located in the middle of the support platform (1) and a sewage inlet pipe (32) located on the sedimentation tank (31). It also includes a funnel-shaped sedimentation element (33) located at the bottom of the sedimentation tank (31).

3. The multi-stage filtration treatment equipment for construction site wastewater according to claim 1, characterized in that: The moving part (41) includes a fixed box (411) disposed at the bottom of the support platform (1), a lead screw (412) disposed in the fixed box (411), and a drive part (413) disposed at the end of the fixed box (411) for driving the lead screw (412). It also includes a screw block (414) disposed on the screw (412) and a connecting plate (415) disposed at the bottom of the screw block (414); It also includes a sluice box (416) symmetrically arranged at the bottom of the support platform (1) and a telescopic rod (417) arranged in the sluice box (416) in a corresponding manner. The connecting plate (415) is fixedly connected to the telescopic rod (417).

4. The multi-stage filtration treatment equipment for construction site wastewater according to claim 3, characterized in that: The cleaning component (42) includes an oil stain cleaning dish (421) disposed at the bottom of the telescopic rod (417) and a discharge pipe (422) disposed at the bottom of the oil stain cleaning dish (421), wherein an electric control valve (423) is provided inside the discharge pipe (422).

5. The multi-stage filtration treatment equipment for construction site wastewater according to claim 2, characterized in that: The sediment discharge section (6) includes a fixed cylinder (61) disposed at the bottom of the funnel-shaped sedimentation piece (33) and a driven gear (62) rotatably disposed on the fixed cylinder (61). The fixed cylinder (61) is divided into upper and lower parts. It also includes a connecting U-shaped frame (63) disposed on the fixed cylinder (61) and a connecting rod (64) disposed inside the driven gear (62), wherein the end of the connecting rod (64) is provided with a rotating shaft (65) located in the axial direction of the fixed cylinder (61). It also includes a spiral conveying blade (66) disposed on the rotating shaft (64) and a driving gear (67) disposed on the driven gear (62); It also includes a drive unit (68) located at the bottom of the drive gear (67) and a support plate (69) located at the bottom of the drive unit (68) for connecting the sediment collection box (2).

6. The multi-stage filtration treatment equipment for construction site wastewater according to claim 1, characterized in that: The connecting component (7) includes a connecting pipe (72) disposed on one side of the sedimentation tank (31) and a pump body (71) disposed on the connecting pipe (72).

7. The multi-stage filtration treatment equipment for construction site wastewater according to claim 1, characterized in that: The impurity cleaning section (8) includes a cleaning box (81) disposed on one side of the sedimentation section (3) and support columns (82) symmetrically disposed on the top of the garbage collection box (11). It also includes a rotating column (83) respectively installed in the support column (82) and the cleaning box (81), and a conveyor belt (84) installed on the rotating column (83). It also includes a baffle (86) disposed on the conveyor belt (84) and a filter hole (85) opened on the conveyor belt (84). It also includes a baffle (87) installed in the cleaning box (81) for fitting the baffle (86) and a drain pipe (88) installed on the filter side of the cleaning box (81).

8. The multi-stage filtration treatment equipment for construction site wastewater according to claim 7, characterized in that: The support column (82) is provided with a drive unit for driving the rotating column (83), the drive unit being an electric motor or motor, and the cleaning box (81) is provided with a level gauge.

9. The multi-stage filtration treatment equipment for construction site wastewater according to claim 1, characterized in that: The recoil component (9) includes a recoil box (91) disposed on the conveyor belt (84), and the recoil box (91) is fixedly installed with the support column (82); It also includes a backflush tube (92) installed on the backflush box (91) and a high-pressure pump (93) installed in the middle of the backflush tube (92) and fixedly installed with the support column (82).

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