631 results about "Sand filter" patented technology

The utility model belongs to the technical field of seawater treatment, particularly relates to a portable seawater desalination device, and aims to solve the problems that in order to meet the fresh water requirement of long-term navigation, a fresh water generator is installed, the volume of the fresh water generator is large, the weight of the fresh water generator can reach more than one ton, and a distillation method adopted by the fresh water generator is that a vacuum pump is arranged to form a low-pressure environment, so that seawater is easier to evaporate. In order to solve the problems of high energy consumption and high requirements on devices in the prior art, the utility model provides the following scheme: the device comprises a frame, and a seawater tank for containing seawater is fixed at the side end of the frame; a filtering part is arranged in the frame and comprises a sand filter, a carbon filter, a softener and a precision filter, the sand filter is communicated with the carbon filter, the carbon filter is communicated with the softener, and the softener is communicated with the precision filter; solar energy is adopted as an energy supply device, no additional electric energy consumption is generated, and the effect of saving energy is achieved; the portable device is convenient and easy to carry, and the space ratio and the load of the ship can be reduced.

The present invention discloses a sampling mechanism for detecting sediment content in water conservancy projects, belonging to the technical field of sampling mechanisms. The present invention comprises a support platform and a servo motor mounted on the upper end of the support platform, wherein the output end of the servo motor is connected to a sampling barrel, a retention hole is formed on the side of the upper end of the sampling barrel, and a water leakage cover is fixed inside the sampling barrel. A protective bottom cover is provided at the bottom of the sampling barrel, and a drain pipe is installed on the protective bottom cover. A first cylinder is mounted on the upper end of the support platform, and the telescopic end of the first cylinder is interconnected by a guide connecting rod and a closed ring, the closed ring is used to control the opening and closing of the retention hole, and a sand filter cloth is provided inside the water leakage cover. When sampling water samples, the sampling mechanism for detecting sediment content in water conservancy projects facilitates stirring of the surrounding water area to be sampled, thereby equalizing the sediment content of the water area and improving the accuracy of subsequent test results.

The invention relates to the technical field of water treatment, in particular to a continuous quicksand filter, and provides the continuous quicksand filter aiming at the problems in the prior art, the height position of an air box is reasonably designed, the structure of the air box is optimized, the air stripping effect of compressed air is fully utilized, and an air pipe is prevented from being blocked; the structure of an existing sand washer is improved, the movement path of filter materials in the sand washer is prolonged, collision among the filter materials is increased, the dirty sand cleaning effect is improved, the three-phase separation effect is improved, and the regeneration and reuse rate of the filter materials is increased; meanwhile, the structure of the water distributor is optimized, the water distribution amount in unit cross sectional area is equal, the filtering height of the sand bed is fully utilized, and the filtering effect is improved.

The utility model provides a filter structure of a sand filter for sewage treatment, which comprises the sand filter, a plurality of rows of sand filter devices are arranged in the sand filter, an overflow weir is arranged between two adjacent sand filter devices in each row, and autotrophic denitrification filler is filled in the sand filter devices; a water inlet pipe is arranged in the water inlet tank, and the end part of the water inlet pipe is communicated with the first sand filtering device in each column. The sewage treatment efficiency and quality are improved, the operation cost is also reduced, and a more economical, environment-friendly and sustainable solution is provided for urban sewage treatment plants.

The utility model discloses a sand silo for pets and a pet toilet which are safe to use. According to the technical scheme, the sand bin for the pets is arranged in a pet toilet for the pets to move or excrete, the sand bin comprises a cavity for containing the pets, an inlet and outlet and a sand filtering net, the sand bin further comprises an upper shell, a lower shell and an excretion channel, the excretion channel is provided with an excretion opening communicated with the cavity and a discharging opening communicated with the outside, and the sand filtering net is arranged in the cavity. The excretion channel is suitable for the excretion to pass through; the upper shell and the lower shell are combined together to form a sand silo main body, the sand filter screen is connected with the upper shell and divides a sand storage space in the cavity, and the discharge port, the discharge port and the discharge channel are arranged on the upper shell; in the rotating direction of pouring out the excrement, the excrement firstly passes through the sand filter screen and then reaches the discharge port, and the discharge port and the discharge port are staggered in the orthographic projection direction, so that the discharge channel has a preset gradient or radian.

The utility model provides a babylonia sand-free recirculating aquaculture system which comprises a self-pollution-discharge sand-free aquaculture pond and a low-level water treatment system, aquaculture tail water of the self-pollution-discharge sand-free aquaculture pond automatically flows into the low-level water treatment system to be subjected to particle three-level purification, and then the purified tail water is pumped into the self-pollution-discharge sand-free aquaculture pond through a water pump; babylonia breeding nests for allowing Babylonia to inhabit are arranged in the self-pollution-discharge sand-free breeding ponds, and automatic pollution discharge devices are installed at the bottoms of the self-pollution-discharge sand-free breeding ponds. The low-level water treatment system comprises a particulate matter three-stage removal device and a pipeline type ultraviolet sterilization device which are connected in sequence, and the particulate matter three-stage removal device is composed of a vertical flow sedimentation tank, a foam separation tank and a sand filter tank which are connected in sequence. The utility model effectively solves the problems that the traditional sand flowing water culture is high in water consumption, more in sand matrix dirt accumulation, easy in disease outbreak, incapable of carrying out industrial culture and the like, and has the advantages of high water-saving efficiency, good dirt collecting and discharging effects, controllable culture environment, few diseases, high culture efficiency and the like.

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 relates to the technical field of cat litter basins, in particular to a vibration litter filter screen, a cat litter basin and a method. Comprising a filtering part and a vibrating part; the filtering part is used for separating cat litter from cat excrement; the vibration part is used for driving the filtering part and the cat litter and the cat excrement in the filtering part to vibrate synchronously, and the vibration part and the filtering part are detachably connected. The vibration sand filter screen of the cat litter basin can provide vibration force when separating cat litter from cat excrement, the separation effect of the cat litter and the cat excrement can be improved, the cat litter is saved, and the use cost is reduced.

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 invention relates to the technical field of wastewater treatment, and discloses a raw water multi-medium filtering device which comprises a filtering tank, an adjusting mechanism arranged outside the filtering tank, a water conveying mechanism arranged in the filtering tank and used for supplying water and draining water, and a plurality of groups of medium boxes sliding in the filtering tank, the adjusting mechanism comprises an alternate adjusting assembly used for alternately adjusting the medium box and a rotary adjusting assembly used for rotationally adjusting the medium box, the medium box comprises a coal sand filtering box and an adsorption filtering box, and through the arranged adjusting mechanism, a plurality of filtering elements with the characteristic of mutual arrangement are arranged, so that flexible adjustment and control are achieved; the coal sand filter boxes or the adsorption filter boxes which are mutually arranged can be alternately adjusted through the adjustment of the alternate adjusting assembly, and the coal sand filter boxes or the adsorption filter boxes can be rotationally adjusted through the adjustment of the rotary adjusting assembly, so that a medium can be backwashed or replaced in the operation process.

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.

The roadbed and pavement structure comprises a gravel sand layer, a coarse sand layer, a graded sand grain layer, a coarse sand filter layer, a subbase layer, a scoria layer and a surface layer, wherein the gravel sand layer is transversely laid on the lower layer of the coarse sand layer, the coarse sand filter layer is located on the upper layer of the graded sand grain layer, the coarse sand filter layer is a longitudinal and transverse structure layer laid on the lower layer of the subbase layer 5, the subbase layer and the volcanic cinder layer are alternately laid to form a compaction layer, and the compaction layer is a two-way transverse slope with the gradient being 0.1%-0.2% and a two-way longitudinal slope with the gradient being 0.3%-0.4% in the width direction of the road surface. Drainage columns are distributed on the compaction layer along the width direction of the pavement in a spaced matrix manner; the surface layer comprises an upper surface layer and a lower surface layer, the upper surface layer is positioned above the lower surface layer, and a thermal insulation layer is arranged between the lower surface layer and the upper surface layer. The roadbed and pavement structure solves the problems that the drainage effect of an existing road is not ideal, and the roadbed and pavement structure is very easy to damage.

The utility model discloses a pressure-resistant sand filtering pipe which comprises a coupling and a base pipe, an upper filtering section and a lower filtering section are sequentially arranged on the outer wall of the base pipe from top to bottom, and a plurality of overflowing holes are formed in the positions, corresponding to the upper filtering section and the lower filtering section, of the pipe wall of the base pipe. A flow equalizing cylinder, a fine sand filter screen cylinder, a coarse sand filter screen cylinder and an outer protective cylinder are sequentially arranged on the outer circumference of the base pipe of the upper filtering section from inside to outside, a flow equalizing cylinder, a fine sand filter screen cylinder, a coarse sand filter screen cylinder, a wire winding filter cylinder and an outer protective cylinder are sequentially arranged on the outer circumference of the base pipe of the lower filtering section from inside to outside, and a plurality of flow equalizing holes are evenly distributed in the cylinder wall of the flow equalizing cylinder. The diameter of each flow equalizing hole is smaller than a half of the diameter of each flow passing hole, and the number of the flow equalizing holes is not smaller than four times of the number of the flow passing holes in the base tube corresponding to the flow equalizing cylinder. When the sand filtering pipe works, oil liquid is good in distribution uniformity on the filter screen, sand accumulation blocking points are not easy to form on the filter screen near the overflowing holes of the base pipe, the filter screen is not easy to deform, and the sand filtering pipe can bear large filtering pressure difference.

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 utility model relates to the technical field of domestic sewage treatment, in particular to a strong-filtering domestic sewage treatment device which comprises a strong filtering box, a discharge pipe and a motor are arranged on the strong filtering box, a bottom plate is arranged below the strong filtering box, a source storage box and a top frame are arranged on the bottom plate, and a sewage injection pump and a strong circulating pump are arranged on the top frame. A sand filter cylinder and a sealing baffle are arranged on the strong filter box, a grating filter screen and an activated carbon filter screen are arranged on the two sides of the sand filter cylinder respectively, a sewage pumping pipe and a sewage injection pipe are connected to the sewage injection pump, a strong backflow pipe and a strong circulation pipe are connected to the strong circulation pump, a disinfection storage box and a disinfection suction pump are arranged on the top frame, and a disinfection connecting pipe and a disinfection injection pipe are connected to the disinfection suction pump. A motor shaft is arranged on the motor, a sealing sleeve and a main shaft are arranged on the motor shaft, stirring blades are arranged on the main shaft, and mixed flow holes are formed in the stirring blades. The forced filtering effect and quality of a domestic sewage source part are improved, and the sterility of later domestic sewage input into chemical sewage treatment equipment is improved.

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.