424 results about "Sand filter" patented technology

The application discloses a kind of intelligent switching water sample pretreatment system and method, system includes: combined sand filter sample barrel, for collecting water sample to be pretreated, initial water sample turbidity value acquisition is carried out, while water sample preliminary pre-filtering treatment is carried out;Positioning floating sampling device, for fixing to take supernatant after water sample settlement;Microfiltration module, for the microfiltration of ultrahigh turbidity water sample;Sample water transfer pump, for transmitting supernatant in combined sand filter sample barrel to microfiltration module;Sample collection barrel, for collecting and detecting water sample quantity after processing, for instrument or laboratory personnel to sample analysis;Valve assembly, by valve opening and closing, water sample is switched different pretreatment mode;Cleaning assembly, including rotary high-pressure spray head and self-heating ultrasonic cleaning device, for cleaning system after pretreatment internal residual adherend.

The utility model discloses a composite filtering water treatment system for wet spunlace, which comprises an air flotation reaction system, a middle water tank, a sand filtering tank filtering system, a micro-nano filtering system and a clean water barrel for production, the air flotation reaction system, the middle water tank, the sand filter tank filtering system, the micro-nano filtering system and the clean water barrel for production are sequentially connected through pipelines; the air flotation reaction system is connected with a production water recovery pipeline, and the middle water tank is connected with a raw water pipeline. According to the composite filtered water treatment system for wet spunlace, the wastewater treatment efficiency is improved, zero discharge of wastewater is achieved, the environmental influence is reduced, water resources are saved, and the production cost is reduced. And meanwhile, the quality of non-woven fabric products is improved.

The invention provides an oxidation active zone remediation system and method for underground water organic pollution. The remediation system comprises a plurality of injection wells and monitoring wells which are arranged at the downstream of an underground water pollution plume; the injection wells are distributed in rows at equal intervals in the direction perpendicular to the underground water flow field, the adjacent injection wells in the same row are distributed at equal intervals, and the injection wells in the adjacent rows are distributed in a staggered mode. The monitoring wells are arranged at upstream and downstream positions of an oxidation active zone formed by the injection wells; the injection well is of a double-well structure and comprises an inner well and an outer well. The inner well and the outer well are slotted floral tubes, a repairing agent is injected into the inner well, and the space between the inner well and the outer well is filled with a slow-release repairing material; and the outer side of the outer well is provided with a well wall formed by filling quartz sand filter materials, sodium bentonite particles and anti-seepage cement paste from bottom to top. According to the remediation system, through the reasonable structural design and application of the remediation agent and the slow-release remediation material, an oxidation activity reaction zone can be rapidly established, underground water pollution diffusion is efficiently blocked, and rapid and effective remediation of underground water is achieved.

The utility model discloses a sand filtering grid for water and soil conservation. The sand filtering grid comprises a first frame, a second frame and a filtering piece, a first window position is formed in the first frame. A second window position is formed in the second frame. A plurality of filtering holes are formed in the filtering part, the filtering part is clamped and fixed between the first frame and the second frame, the first frame and the second frame are detachably connected, and the first window position and the second window position are used for exposing the filtering part. When the sand filtering grid needs to be cleaned, the filtering piece is independently detached to be cleaned, the cleaning mode of the sand filtering grid is simplified, the cleaning workload is reduced, in addition, when the sand filtering grid is cleaned, the cleaned or new filtering piece can be directly installed between the first frame and the second frame, and the working efficiency of the sand filtering grid is effectively guaranteed. In addition, due to the fact that the filtering pieces in the sand filtering grating are in detachable design, the filtering layers with the filtering holes with different hole diameters can be replaced according to the particle size of the actually intercepted and filtered sundries, and the use flexibility of the sand filtering grating is improved.

This utility model discloses an oxygen denitrification treatment device for aquaculture water, including a treatment tank. The treatment tank is equipped with a filtration zone, an aerobic biological zone, an anoxic biological zone, and a degassing zone. The filtration zone is filled with quartz sand filter media. The aerobic biological zone contains biological packing material and has a jet aeration ring on its outer wall, which is connected to an ozone-oxygen mixture generator. The anoxic biological zone is filled with porous ceramsite packing material. The degassing zone has a guide plate inside. In this utility model, the aquaculture water can be filtered for suspended particulate matter through the quartz sand filter media. The jet aeration ring can introduce ozone-oxygen mixture gas, which, together with the honeycomb biological packing material, can complete ammonia nitrogen oxidation. The denitrifying bacteria on the surface of the porous ceramsite packing material can convert nitrates into nitrogen gas. Finally, the gas is separated by the guide plate, and the purified water can be discharged from the outlet. Thus, through the above structure, efficient denitrification, oxygenation, and purification of aquaculture water can be achieved, improving water quality treatment efficiency and stability.

A system allowing a three-phase filtering and ensures selected return of a maximum volume of the backwash to the input line for feeding fluid back into the pool volume as required. The three-phase filtering can in one advantageous form include: 1. filtering through the top internal filter basket in the tank 2. Sediment separation by the unique base at the bottom of tank 3. return to the pool via the existing sand filter. This provides a substantial water saving.

The invention relates to the technical field of industrial waste gas purification, and particularly discloses a magnetic control type micro-nano bubble industrial waste gas absorption and purification device which comprises a base, a purification mechanism arranged on the base and used for purifying waste gas, and a regulation and control mechanism arranged on the base and used for regulating and controlling the waste gas. The regulation and control mechanism is used for regulating the gas inlet and outlet speed of the device. By arranging the purification mechanism, when the device is used, the device can block suspended colloid larger than pores by utilizing the pores of a filter material quartz sand filter membrane through a purification box, and adsorb dissolved organic pigment heavy metals in water by virtue of pores and chemical groups on the surfaces of filter materials such as activated carbon zeolite and the like under the adsorption action similar to a sieve; and in addition, a first motor can be started to drive a connecting pipe and a transverse pipe to extract waste gas in a filter pipe into a purification box for purification and filtration, gas inlet of the device can be regulated and controlled through a pipeline valve, and the use safety of the device is improved.

This utility model relates to the field of sand filter cleaning technology and provides a V-type sand filter ultrasonic rotary spray device, comprising: a sand filter body; an ultrasonic generator installed on the outer wall of the other side of the sand filter body; ultrasonic transducers uniformly fixedly installed on the inner wall above the filter media tank; a spray mechanism movably installed at the top of the fixed pipe and branch pipe; and a protective filter screen uniformly installed at the top of the spray mechanism. The V-type sand filter ultrasonic rotary spray device provided by this solution utilizes the operation of the ultrasonic generator to cause multiple ultrasonic transducers on the upper layer of the filter media in the filter media tank to generate ultrasonic vibrations, performing ultrasonic cleaning on the upper layer of filter media. This is combined with the main nozzle and inclined nozzle rotating to spray and rinse, and then with the operation of a second water pump to draw water into the water supply pipe. The water flowing through the water supply pipe enters multiple connecting pipes and is then sprayed out through multiple flushing heads to rinse and remove contaminants, achieving efficient rinsing of the filter media above the filter media tank.

The invention discloses an environment-friendly production process of levamisole ferulate and a harmful wastewater purification device, and relates to the technical field of wastewater treatment.The device comprises a sand filter tank and a sedimentation basin, the sand filter tank is connected with the sedimentation basin, a filter material layer is arranged in the sand filter tank, and a rotatable filter material treatment mechanism is arranged in the sand filter tank; the lower part of the filter material treatment mechanism extends into the filter material layer; in the running process of the sand filter tank, the filter material treatment mechanism is configured to rotate around the axis of the filter material treatment mechanism and shovel the filter material in the filter material layer into the filter material treatment mechanism, grinding and kneading attachments on the surface of the filter material, and then backfilling the treated filter material into the filter material layer. According to the sand filter, the grinding roller in the filter material treatment bin is matched with the grinding layer, sand grains are directly and strongly kneaded and rubbed in the equipment operation process, colloids, viscous substances and pigments adhered to the surface of a filter material are effectively stripped, the filter material layer is prevented from being hardened or forming mud balls, and therefore the operation cycle of the sand filter is remarkably prolonged.

The utility model relates to a dam seepage failure pile planting treatment structure which is used for blocking a seepage channel in a dam, the dam seepage failure pile planting treatment structure comprises a plurality of profile steel piles, a plurality of steel sheet piles, a coarse sand inverted filter layer and a rock ballast backfill body, the profile steel piles are arranged in the dam in the gravity direction, and the coarse sand inverted filter layer is arranged in the rock ballast backfill body. The multiple profile steel piles are arranged at intervals in the length direction of the dam; the steel sheet piles are arranged in the dam in the gravity direction, the steel sheet piles are located on the upstream sides of the profile steel piles and are close to the profile steel piles, the multiple steel sheet piles are sequentially arranged in the length direction of the dam and form a plugging face, and the plugging face can shield the cross section of the permeation channel; the coarse sand inverted filter layer and the rock ballast backfill body are located on the outlet side of the permeation channel and block the outlet of the permeation channel, and the coarse sand inverted filter layer and the rock ballast backfill body are laid in sequence after being locally excavated at the outlet of the permeation channel. The pile planting disposal structure for the dam seepage damage can avoid the shortage of lifting protection and reduce the water damage loss.

The invention provides an intelligent beach cleaning vehicle based on solar energy driving, and relates to the technical field of beach cleaning devices. A light energy conversion device; primary sand filtering holes are uniformly formed in a sand filtering conveying belt of the primary sand shoveling and filtering device; according to the secondary sand filtering device, secondary sand filtering holes are evenly formed in the discharging slide slope, and sand materials smaller than the secondary sand filtering holes penetrate through the vibrating screen disc to fall into the ground; the material receiving disc and materials which cannot penetrate through the vibrating screen disc move towards one side of the material receiving disc in the vibrating process until falling into the material receiving disc, the two sand filtering mechanisms are arranged, feeding of sand materials and primary filtering of sand are integrated, meanwhile, the feeding and crushing grid plate is further arranged, and the feeding and crushing efficiency is improved. On one hand, the sieve plate can be used for feeding, so that the advancing resistance of the vehicle body is reduced, and on the other hand, agglomerated sand bodies can be scattered through contact with the sand bodies, so that the subsequent sand screening operation is more facilitated.

The invention belongs to the technical field of strawberry planting, and discloses a strawberry elevated planting water and fertilizer integrated device which comprises a control box, a gravel filter is installed on the rear side of the control box, the gravel filter is fixedly communicated with a laminated filter, and through cooperation of structures such as an outer pipe, an inner pipe, a spiral groove and an inclined hole, a double-layer drip irrigation pipeline is utilized, and the water and fertilizer integrated device is formed. By rotating the adjusting inner pipe, the drip irrigation point position can be adjusted, long-time drip irrigation at the same point position is avoided, each strawberry plant can uniformly receive fertilizer irrigation, the drip irrigation density can be adjusted, the drip irrigation rate can be adjusted in cooperation with a machine body, the device effectively adapts to the plant growth condition, constant-speed and accurate drip irrigation is achieved, it is ensured that the plant growth environment is basically consistent, and the quality is improved; the double-layer pipeline of the outer pipe and the inner pipe is adopted for drip irrigation, compared with a traditional mode that two single-layer pipes are used, the number of branches is reduced, the water pressure needed by a single planting box can be effectively reduced, more production lines can be increased, and therefore the strawberry planting yield is increased.

The utility model relates to the technical field of quartz sand filter material screening, and discloses a quartz sand filter material screening machine for sewage treatment, which comprises a screening box, the top of the screening box is fixedly connected with a feed hopper, the top of the feed hopper is hinged with a sealing cover plate, and the rear end of the screening box is provided with a dust collection assembly. A box door is hinged to the front end of the screening box, a first screen is arranged in the screening box, a second screen is arranged at the lower end of the first screen, springs are fixedly connected to the bottom of the first screen and the bottom of the second screen, and fixing plates are fixedly connected to the bottoms of the springs. The dust collection assembly is arranged, specifically, the negative pressure fan is started in the screening process, negative pressure is generated in the square pipe through the negative pressure fan, dust generated in the screening process is sucked into the square pipe to drive the interior of the square pipe, the dust is filtered and removed through the two filter screens, and the dust generated in the screening process is effectively reduced; and the working environment and the health of operators are protected.

The application discloses a cable protection pipe sand cleaning device and a use method, and relates to the technical field of cable protection pipe maintenance. The cable protection pipe sand cleaning device comprises a force bearing rod, filter bodies and a cover body. A plurality of buckling grooves which are matched with the circles of the filter bodies are formed in the force bearing rod. The plurality of filter bodies are arranged from top to bottom and are connected with the force bearing rod through the buckling grooves. The cover body is provided with first tenons which are matched with mortises on the filter bodies. The mortises and the first tenons are connected through clamping to form a mortise and tenon structure. The filter bodies are connected with the cover body through the mortise and tenon structure. The technical problem that the inner wall of the cable protection pipe is easily damaged in the process of dragging the cable is solved. The four-layer filter bodies with diameters gradually decreasing from large to small are used to form a sand filtering part of the device, different aperture filter bodies are installed on each layer, sand can be filtered layer by layer, and the cleaning effect is ensured.

The present application relates to the technical field of deep-sea resource development, and specifically relates to a deep-sea low-disturbance mining robot control system, comprising: an information perception module for acquiring and transmitting multi-source sensing data; a central control module for receiving and processing the multi-source sensing data to generate coordinated control instructions; a motion and attitude adjustment module for receiving the coordinated control instructions to drive a piston-type variable buoyancy tank and walking feet to execute actions, and to adjust the overall buoyancy, attitude and walking state of the robot; a collection and storage and transportation operation module for receiving the coordinated control instructions to drive a suction mechanical arm and a mineral storage and transportation box to execute actions, and to collect and transport minerals. The present application improves the walking stability and operation adaptability of the robot in complex terrain, effectively prevents subsidence and attitude instability, combines a sand filtering structure and dynamic buoyancy compensation, reduces disturbance to seabed sediments, reduces turbidity current diffusion, and has environmental friendliness, and can perform long-term, continuous and stable high-efficiency mining operations in deep sea.

The utility model discloses a sand screening device for building construction, and relates to the technical field of sand screening for building construction, the sand screening device comprises a device main body and a sand screening mechanism, the sand screening mechanism is arranged on the inner side of the device main body, and by arranging the sand screening mechanism, the telescopic length of a hydraulic lifting rod is adjusted, so that the position of a sand throwing plate is conveniently changed according to the sand amount; sand in the sand storage tank is thrown to the sand screening net through the sand throwing plate, the sand is more dispersed and uniform in the falling process through throwing, when the sand is thrown up through the sand throwing plate, the mass stress of large-particle broken stones mixed in the sand is larger, and therefore the large-particle broken stones are thrown farther than the sand, the large-particle broken stones fall into the collecting bin, and the collecting efficiency is improved. And meanwhile, the sand blocking fan blows air inwards, so that the sand is subjected to outward wind resistance, a large amount of sand is prevented from being thrown into the collecting bin, the sand screening effect is ensured, broken stones entering the collecting bin are screened through the sand filtering screen, and normal sand entering the collecting bin can fall into the sand outlet so as to be taken and used together.

The utility model provides a centralized slurry station applied to a plateau wetland protection area, which is characterized in that the middle of a slurry pool is divided into a slurry making tank and a slurry storage tank through a partition plate, and a slurry feeding device is arranged in the slurry storage tank and extends to a grouting and slurry returning platform through a slurry feeding pipeline; the slurry returning device is arranged on the pouring slurry returning platform and extends to the slurry pool through a slurry returning pipeline, and a sand filtering groove correspondingly communicating with the slurry returning pipeline and the slurry storage groove is formed in the outer side of the slurry pool. The slurry station provided by the utility model is small in construction site occupation and small in disturbance to the surrounding environment, the whole working environment forms a closed cycle, a waste discharge mode is dry material and green construction, the slurry can be recycled in the construction process, the construction investment is small, and the whole slurry station is simple to construct, low in manufacturing cost, easy to construct and operate and remarkable in environmental protection effect.

An iron bucket plastic bucket hazardous waste resourceization sewage treatment system based on segmented oxidation and dynamic regulation, strong alkali wastewater enters the first artificial grid, the first oil separation tank, the strong alkali water adjusting tank, the PH adjusting tank, the demulsification tank, the first coagulation sedimentation tank, the sand filter and the reuse water tank in sequence through the water inlet; the comprehensive wastewater enters the physical and chemical pretreatment unit, the hydrolysis acidification tank, the nutrition tank dosing tank, the anaerobic UASB tank, the AO biochemical tank, the secondary sedimentation tank, the Fenton advanced oxidation unit and the biological aerated filter in sequence through the water inlet, the sludge inlets of the first coagulation sedimentation tank, the anaerobic UASB tank, the secondary sedimentation tank and the Fenton advanced oxidation unit are connected with the sludge tank inlet in sequence, the utility model discloses scientific and reasonable design, multi-mode switchable process flow, 18% lower than traditional process, energy consumption reduces 25% at low load; effectively reduce the water treatment cost of 0.8-1.2 yuan per ton, and the social and economic benefits are remarkable.

The utility model relates to a wastewater treatment technology, and discloses a wastewater filtration treatment system for aquaculture, which comprises an aquaculture pond, a coarse filtration structure, a fine filtration structure, a sterilization and disinfection structure, a purified water storage pond and a PLC (Programmable Logic Controller), a hair filter of the coarse filtering structure is connected with an automatic backwashing device, and a first water quality monitoring sensor is arranged on the coarse filtering structure; the fine filtration structure comprises an upper activated carbon adsorption layer, an anthracite filter material layer, a quartz sand filter material layer and a cobblestone filter material layer, a second water quality monitoring sensor is mounted on the fine filtration structure, the fine filtration structure is connected with the sedimentation tank, a third water quality monitoring sensor and a lifting water pump, and the fine filtration structure is connected with an ozone generator. The ozone generator is provided with an aeration head, the aeration head is connected with the purified water storage pool, the ozone generator is provided with a fifth water quality monitoring sensor, the purified water storage pool is provided with a sixth water quality monitoring sensor and a recycling pump, and the recycling pump is connected with the aquaculture pond.

The utility model relates to the technical field of hydraulic engineering, in particular to water quality purification equipment for hydraulic engineering. Comprising a pretreatment assembly, a grating assembly, a purification assembly, a sand filtering assembly and a filtering assembly, the pretreatment assembly comprises a pretreatment box, the grating assembly comprises a grating plate and a sealing plate, the purification assembly comprises a purification box, a backflushing pipe, a water inlet pipe and a first water pump, and the sand filtering assembly comprises a flow guide plate and a sand filtering layer. The filtering assembly comprises a filtering box and a second water pump, the lower end of a back-flushing pipe is connected with a back-flushing spray head, a sand filtering layer is filled with quartz sand, and a filtering layer is arranged on the inner side of the filtering box. After water flows into the purification box from the first water conveying pipe, the water is blocked by the flow guide plate in the falling process of the purification box, then the water continuously falls through the flow guide groove, when the water passes through the quartz sand, suspended solids and colloids are intercepted and adsorbed, and then the suspended solids and the colloids in the water are removed through the sand filtering layer.

The invention discloses a Yellow River raw water coagulation-sand filtration-ultrafiltration treatment system and method based on a composite filter material, and belongs to the technical field of water treatment. The device comprises a coagulation unit, a sand filtration unit and an ultrafiltration unit which are sequentially connected in the water flow direction. Wherein the sand filtration unit is filled with multiple layers of composite filter materials, and the composite filter materials sequentially comprise an aluminum ion modified quartz sand layer, an aluminum ion modified quartz sand layer and an aluminum ion modified quartz sand layer from top to bottom, the granular active carbon layer is used for deeply adsorbing and removing small molecular organic matters; and the manganese sand layer is used for catalytically removing iron and manganese ions and is used as a supporting layer for stabilizing the filter bed. The method comprises the following steps: carrying out coagulation treatment on Yellow River raw water, introducing the treated Yellow River raw water into the composite sand filtration unit, carrying out deep pretreatment, and filtering the pretreated Yellow River raw water through the ultrafiltration membrane. According to the method, through gradient filtration and function cooperation of the composite filter material, the synchronous removal efficiency of turbidity and UV254 can be remarkably improved, high-quality inlet water is provided for an ultrafiltration membrane, membrane pollution is effectively controlled, system operation energy consumption is reduced, and the method has the advantages of being low in resource consumption, little in environmental pollution, good in economic benefit and the like.

According to the powerful cleaning quicksand filter, the filter is of a closed structure, and fluid enters from the bottom and flows out from the top; a combination of a water pump and a water ejector is adopted for conveying and cleaning a filter material to provide power, mixed water is firstly adopted for conveying, cleaning and desorption of the filter material, and then filtered clean water is adopted for rinsing in a separator; due to the fact that a plurality of combination modes are adopted for strongly cleaning the filter material, the cleaning effect is guaranteed. Therefore, a 0.1-0.3 mm micro sand filter material can be adopted, the filtering precision is greatly improved, and the use of viscous suspended matter water can be met.

The present application belongs to the technical field of oily sewage treatment, and specifically discloses an oily sewage treatment system for an oil sand oil treatment station, which comprises a first treatment pool, a second treatment pool and a high-temperature ethylene glycol main pipe, the two pools are connected through a connecting pipe with a sand filtering assembly, a cover is arranged on the top of the pool body, a screw pump is installed on the cover of the second treatment pool through a support, the rotor and the stator of the screw pump extend into the pool, an oil liquid inlet pipe is connected to the first treatment pool, an inclined sand screening plate is arranged in the first treatment pool, high-temperature ethylene glycol coils are arranged on the bottom of the two pools, the coils are connected with the high-temperature ethylene glycol main pipe and have a gap with the bottom of the pool, and a loading sewage discharge pipe is further arranged in the pool. The present application is aimed at the problem that the existing sewage discharge pool is prone to freezing and solidification of oil liquid in a low-temperature environment, thereby affecting secondary treatment. In the present application, the sewage enters the first treatment pool through the oil liquid inlet pipe, the sand screening plate is used to preliminarily remove sand, the oil liquid enters the second treatment pool through the connecting pipe after sand filtering, the high-temperature ethylene glycol heats the sewage through the coils, thereby reducing the viscosity of the oil liquid and preventing freezing, and the screw pump is used to extract and recycle the oil liquid.

The utility model relates to an aluminum shell cleaning wastewater recycling treatment system, including cleaning machine pure water tank, quartz sand filter vat, activated carbon filter vat, heating water tank, cleaning machine cleaning tank, sewage collection pond and filter water bucket, the output of cleaning machine pure water tank is connected sewage collection pond, and the top one side of cleaning machine pure water tank is provided with overflow sewage outlet, and the slightly contaminated water of cleaning machine is collected to sewage collection pond through overflow sewage outlet, the output of sewage collection pond is connected quartz sand filter vat, and the output of quartz sand filter vat is connected with activated carbon filter vat, and activated carbon filter vat is connected filter water bucket through pipeline, filter water bucket connects heating water tank, and heating water tank is connected cleaning machine cleaning tank through pipeline, and the on -line detection instrument of PH value is set up on cleaning machine cleaning tank, the utility model can solve the pressure of sewage treatment, reduce the production cost of enterprise, make the cleaning of sewage only need simple processing to use, simple operation can greatly improve production efficiency.

The utility model discloses a multi-stage purification device for barreled water production, which belongs to the technical field of multi-stage purification of barreled water and is characterized in that a first purification filter layer, a second purification filter layer and a third purification filter layer are sequentially arranged in a first purification tank from top to bottom; the multi-layer filtering and purifying operation in the production of the barreled water is realized through the first purifying and filtering layer, the second purifying and filtering layer and the third purifying and filtering layer; a first liquid discharge pipeline, a second liquid discharge pipeline and a third liquid discharge pipeline which sequentially correspond to the first purification filter layer, the second purification filter layer and the third purification filter layer are arranged on the other side of the first purification tank. The three-layer purification and filtration system (comprising a grating, a sand filter, a screen filter and an activated carbon filter screen) sequentially removes impurities in water to ensure that the water quality is qualified. And the design of the drainage pipeline facilitates continuous and efficient purification. And the backwashing pump conveys cleaning liquid to the purification tank to backwash the filter layer, so that impurities are removed, and the service life is prolonged. Flushing sewage is discharged through a blow-off pipeline, and the system is kept clean.

The invention discloses a landfill leachate multi-stage efficient interception, filtration and separation device, and relates to the field of sewage filtration, the landfill leachate multi-stage efficient interception, filtration and separation device specifically comprises an active carbon filter and a quartz sand filter, the active carbon filter is located below the quartz sand filter, and the input end of the active carbon filter is communicated with the output end of the quartz sand filter through a connecting pipe; through precise cooperative regulation and control of the air cylinder and the sealing plug, scientific control of the flow direction of a cleaning agent is achieved, flexible soaking and vortex scouring are conducted on a reverse osmosis membrane, precise and harmless cleaning of scaling is achieved, membrane holes are guaranteed to be through, the service life of a membrane body is prolonged, back washing of a quartz sand filter is completed through synchronous linkage, and the service life of the reverse osmosis membrane is prolonged. Blockage pain points are solved from the source, integrated cleaning of the double-core component can be completed without disassembly, the operation and maintenance process is simplified, the treatment efficiency is improved, and efficient support is provided for harmless and resourceful treatment of the landfill leachate.

The invention discloses a sand filter defect detection method, device and equipment, a storage medium and a product thereof, and relates to the technical field of water treatment equipment detection.The method comprises the steps that a collected sand filter internal image is obtained; performing reflective pollution treatment on the internal image of the sand filter to obtain a pre-processed image; the preprocessed image is input to an improved YOLO11 for defect detection and classification, a detection result is obtained, and the improved YOLO11 is obtained by adding a coordinate attention module in a backbone network of the YOLO11, adding a target detection head for detecting a target with a preset size in a detection head of the YOLO11 and replacing an original IoU in the YOLO11 with CIoU. That is, by improving the feature extraction network of YOLO11, the feature capture ability of hardened texture, moss color and floating object form is enhanced, and the detection precision in a complex environment is improved.

The application discloses a denitrification and dephosphorization method based on sand filtration in-situ optimization, which comprises the following steps: (1) mixing green algae obtained by centrifugal treatment of green algae bacteria liquid with sodium alginate solution to obtain a sodium alginate green algae mixed solution; and preparing a metal cation solution; (2) pouring the sodium alginate green algae mixed solution into a sand filter tank filled with sand filter fillers in 1-2 times; then pouring the metal cation solution into the sand filter tank in 1-2 times, and solidifying to obtain modified sand filter fillers wrapped with microbial hydrogel; (3) feeding sewage to be treated into the sand filter tank for denitrification and dephosphorization purification; and (4) after the sand filter tank is operated for 15-30 days, discharging sewage in the sand filter tank, and repeating steps (1)-(3). The cross-linking reaction of sodium alginate and metal cations forms hydrogel, the green algae is fixed on the outer layer of quartz sand, and microbial hydrogel is formed, so that the erosion and wear of quartz sand in the filtration process can be protected, and the denitrification and dephosphorization effect is improved.

The invention discloses a rainwater collecting, recycling and purifying system for a chemical production workshop, and relates to the technical field of industrial water resource recycling. The system comprises a rainwater collection tank, a sedimentation tank, a quartz sand filter unit, an activated carbon filter unit, an ultrafiltration membrane separation unit and a disinfection water tank which are connected in sequence, and a matched sludge treatment unit and an intelligent control unit. Rainwater is firstly subjected to sedimentation pretreatment after being collected, and then suspended solids, organic matters and microorganisms are removed step by step through a four-stage series purification process; sludge is treated by the frame-plate filter press, and clear liquid flows back to the system; and the controller automatically adjusts operation parameters of each unit based on multi-point water quality monitoring data, so that intelligent regulation and control and safety protection are realized. The problems that the chemical rainwater purification depth is insufficient and the intelligent level is low are solved, safe recycling of rainwater resources is achieved, the effluent COD removal rate reaches 82%, the turbidity removal rate reaches 97%, and the production cost and the environmental load are effectively reduced.

The application discloses a scouring protection and active repair device for offshore wind power large-diameter single-pile foundation, relates to the technical field of offshore single-pile wind turbine foundation protection, and comprises a sand filtering and flow disturbing assembly and a scouring pit repair assembly, the sand filtering and flow disturbing assembly is arranged around the single-pile foundation to intercept and collect silt carried by sea current; wherein the scouring pit repair assembly comprises a lifting ring, a connecting rod and a silt scraping plate, the lifting ring is arranged on the outer wall of the single-pile foundation in a lifting and rotating mode, the silt scraping plate is connected with the lifting ring through the connecting rod, and the silt scraping plate pushes the silt collected by the sand filtering and flow disturbing assembly into the scouring pit under the driving of the lifting ring; and the application further comprises a monitoring assembly for monitoring the formation of the scouring pit around the single-pile foundation. The application integrates real-time monitoring, active repair and self-power supply functions, realizes sand filtering and flow disturbing, lifting and rotating silt scraping cooperative operation, accurately fills and resets the scouring pit, effectively inhibits the development of scouring, and significantly improves the safety and service life of the pile foundation.