342 results about "Reclaimed water" patented technology

The invention relates to a water treatment and membrane separation technology, and provides an integrated catalytic separation membrane, a preparation method thereof, and a water treatment method and system. According to the membrane, polyvinylidene fluoride is used as a continuous phase to form a porous matrix, and cerium dioxide is embedded and fixed in a mode of uniform dispersion in a membrane body in a phase inversion membrane forming process; in the presence of illumination and peroxysulfate, active species are generated through in-situ activation on a membrane-water interface, and membrane separation is completed synchronously. The water treatment method comprises the following steps: adding peroxymonosulfate or peroxydisulfate into a water body to be treated, and filtering through the membrane under illumination; the photothermal effect generated by organic matter degradation intermediates in operation inhibits membrane pollution and maintains flux. According to the invention, short-range coupling of active sites and mass transfer channels is realized, the medicament and energy utilization rate is improved, the coating stripping and metal dissolution risk is reduced, and the method is suitable for drinking water pretreatment, reclaimed water deep treatment and treatment of water containing natural organic matters / humic acid.

The invention relates to the technical field of sewage treatment, in particular to a metal sulfide nanoparticle slow-release activator for sewage treatment and a preparation method of the metal sulfide nanoparticle slow-release activator for sewage treatment. The surface of the core layer is coated with the porous silicon dioxide membrane shell layer; the citric acid modifier is loaded on a core-shell interface; according to the invention, metal sulfide (such as FeS, MoS2, WS2 and the like) micro-nano particles are used as a solid-phase slow-release activator, so that the core problem of a traditional homogeneous activation system is radically solved. Firstly, the metal sulfide exists in the form of a solid phase and can directly contact and react with permanganate without an additional dissolving step, so that the problem of complicated process operation caused by poor solubility of activating agents such as sulfite is thoroughly avoided, and the process of reclaimed water treatment is simplified. The problem of poor continuous oxidation effect of a traditional homogeneous system is thoroughly solved.

The invention belongs to the technical field of building reclaimed water treatment systems, and particularly relates to a building reclaimed water treatment system based on edge self-control. The building reclaimed water treatment system comprises a sensing layer, an edge self-control layer and a cloud platform layer, the cloud platform layer is connected with the edge self-control layer through asynchronous communication, and the edge self-control layer controls the sensing layer in real time; the sensing layer comprises a water quality sensor unit, an equipment detection unit, a flow detection unit and an environment sensing unit; the edge self-control layer comprises an edge computing gateway, an edge intelligent engine, a local control unit and an edge collaborative network; the cloud platform layer comprises a model training unit, a data analysis unit, a comprehensive management unit and a strategy optimization unit. The invention provides the building reclaimed water treatment system with high reliability, high intelligence and high real-time performance, an advanced water treatment process and an edge intelligent control technology are deeply fused, the dependence on centralized control and network connection is reduced, refined and intelligent management of reclaimed water treatment is realized, the water resource utilization efficiency and the system operation benefit are maximized, and the water resource utilization efficiency and the system operation benefit are improved. Meanwhile, energy consumption and maintenance cost are reduced, and system safety and user experience are improved.

The invention discloses a curing agent for curing and damming solid waste and a layer-by-layer cofferdam damming process, and relates to the technical field of damming filler devices. The curing agent is characterized in that a guide and discharge device with a guide and regulation effect is arranged on the front side of a preparation device; a reclaimed water device with filtering and flow guiding functions is arranged on the side face of the preparation device, and the industrial solid waste environment-friendly treatment, solidification and accumulation technology is adopted, so that equipment machining automation is achieved; according to the process of stirring industrial solid waste and reclaimed water according to a ratio, adding a curing agent according to a classified ratio of the industrial solid waste, conveying by a pipeline, curing and building a weir, repairing a pool on a pool, forming a central emergency pool, stacking and storing, and greening the solid, the dust pollution after stacking is reduced, the storage capacity can be increased, the service life is prolonged, and the environmental pollution is reduced. The effect after layered solidification and accumulation is similar to that of a terraced field, vegetation greening is carried out after soil covering, and the industry is recovered and improved step by step.

The invention relates to the technical field of water resource management and optimal scheduling, and discloses a dynamic-based regional reclaimed water utilization scheduling method and system.The method comprises the steps that natural water volume, water quality conditions and water resource supply and demand data are collected, and a water source data set is obtained; analyzing the water source data set to evaluate the current reuse water utilization situation, and determining the reuse water utilization potential in combination with a target file; integrating the reclaimed water utilization potential and the regional dynamic characteristic data into a comprehensive data set, and inputting the comprehensive data set into a dynamic model to predict a reclaimed water optimal configuration scheme; and triggering a corresponding water supply strategy according to the optimal configuration scheme in combination with the purpose of the reclaimed water. According to the application, efficient scheduling of reclaimed water is realized through the kinetic model, the water resource utilization rate is improved, and regional economic and ecological requirements are met.

The invention provides reclaimed water utilization equipment for water resource management, which comprises a U-shaped regeneration channel, a connecting strip is transversely arranged on the upper part of the U-shaped regeneration channel close to the inlet end of the U-shaped regeneration channel, a plurality of blocking strips are downwards arranged on the connecting strip, and a horizontal connecting plate is horizontally arranged on one side of the blocking strips in the U-shaped regeneration channel. The lower end of the horizontal connecting plate is connected with a plurality of connecting ropes, and each connecting rope is provided with a plurality of biological fillers; a biological floating bed is arranged above the horizontal connecting plate in the U-shaped regeneration channel, a plurality of planting holes downwards penetrate through the biological floating bed, a detachable planting cup is arranged in each planting hole, an opening is formed in the lower end of each planting cup, and the side wall of each planting cup is of a net-shaped structure. According to the invention, a plurality of stable water quality purification technologies are adopted, and inferior river water is converted into available regenerated water resources.

This invention discloses a method for recycling and reusing cyanide silver plating wastewater. The method includes four steps: separation of silver ions and cyanide, concentration of the silver-containing solution, cyanide concentration, electrolysis and residual liquid recycling, and reuse of reclaimed water. This method achieves the separate recycling and reuse of silver, cyanide, and water. The silver-containing solution is electrolyzed to obtain metallic silver, the cyanide concentrate's main component is sodium cyanide or potassium cyanide solution, and the reclaimed water with a conductivity below 20 μS / cm is reused in the production line. This method not only maximizes resource utilization and reduces wastewater discharge, but also separates most of the cyanide from the silver-containing solution during electrolysis, making the electrolysis process safer. Furthermore, the residual liquid after electrolysis can be recycled multiple times for the separation and concentration of silver ions and cyanide.

The invention relates to the technical field of domestic sewage treatment, and discloses a domestic sewage treatment dynamic regulation and reuse system based on data analysis. A hydraulic power and load impact early warning module; an effluent quality prediction module; a collaborative optimization decision module; an execution control module; and a water quality monitoring and verification module. According to the method, water quality prediction and load early warning are carried out by using real-time data, process parameters are dynamically adjusted through a numerical optimization algorithm, the operation cost is reduced to the maximum extent, water quality compliance is ensured, and the stability and reliability of sewage treatment and the high efficiency of reclaimed water reuse are ensured through full-process closed-loop control and accurate water quality monitoring verification.

The utility model provides a grey water treatment system which comprises a wash basin and / or a mop pool, a grey water tank connected with a water outlet of the wash basin and / or the mop pool through a drain pipe, a grey water pump connected with the grey water tank, and a water outlet end of the grey water pump is connected with a filter, wherein the grey water tank is internally provided with a filter basket for filtering water flowing into the wash basin and / or the mop pool; the top end of the filter is connected with a pressure sensor B and a pressure gauge, the filter is connected with an air flotation machine, the air flotation machine is connected with an ozone catalysis device, and the reclaimed water tank water supply system is connected with the ozone catalysis device. According to the utility model, grey water in the hand basin and the mop pool is treated into reclaimed water for reuse, and the reclaimed water is used for flushing the toilet, so that the burden of municipal sewage treatment is greatly reduced, and precious tap water resources are saved.

The application discloses a method for detecting low-concentration urea in reclaimed water and a continuous online monitoring device, and belongs to the technical field of water quality monitoring equipment. The method comprises the following steps: adding sulfuric acid solution into a water sample to be detected to adjust pH to 3-5, then adding sodium dodecyl sulfonate and ethylenediaminetetraacetic acid to form a urea stable system; concentrating the water sample by vacuum distillation under the condition of 60-80 DEG C; adding a chromogenic reagent and a stabilizing reagent into the concentrated water sample, and reacting under the condition of 65-75 DEG C for 10-15 minutes; and determining the absorbance by using an ultraviolet detector and calculating the urea content. The application further provides a continuous online monitoring device for realizing the method. The application can accurately detect low-concentration urea below 80 mu g / L, the single detection time is less than 30 minutes, the anti-interference capability is strong, and full-process automatic control is realized.

The utility model relates to the technical field of sewage treatment, and discloses an automatic flushing device for a pipe in front of a pump, which comprises a high-pressure flushing pump and a blow-off pipe, one end of the high-pressure flushing pump is connected with a flexible joint I, the flexible joint I is communicated with a reclaimed water supply pipe, and the middle part of the outer wall of the reclaimed water supply pipe is fixedly connected with a valve I; and the other end of the high-pressure flushing pump communicates with a second soft connector, the top of the second soft connector communicates with a flushing hard pipe, the right side of the outer wall of the flushing hard pipe communicates with a check valve, and the left side of the outer wall of the flushing hard pipe is fixedly connected with a second valve. The first valve and the second valve flexibly control on-off and flow of liquid, flushing force can be accurately adjusted according to actual requirements, flushing efficiency is improved, the check valve prevents liquid from flowing back, the high-pressure flushing pump is protected, stable operation of the device is guaranteed, and the flushing hose blocks sludge through deformation, loosening and hardening caused by pressure application and release. The sludge is further flushed through the widely distributed micropores, so that the smoothness of the sludge pipe is ensured.

The application discloses a heavy water recovery device of a deuterium generator, which comprises a cooling box, a collecting box, a heat exchange device and a condenser pipe, an installation groove is arranged on the cooling box, an installation rod is arranged in the installation groove, an upper top groove is arranged on the installation rod, a positioning rod is arranged in the upper top groove through an upper top mechanism, positioning holes are arranged on the cooling box, a driving motor is arranged on the positioning rod, a driving gear is rotatably arranged on the upper end surface of the cooling box, the driving motor is connected with the driving gear through a clamping mechanism, and a screw rod is rotatably arranged on the cooling box through a supporting plate. The device is provided with a screw rod, a threaded sleeve, a connecting rod and a scraping ring, the water film on the inner wall of the condenser pipe can be scraped and collected, and the recycling effect of the reclaimed water is ensured; the device is provided with a driving gear, a transmission gear, a screw rod and a connecting rod, the synchronous movement of the two scraping rings is realized, and the transmission and linkage effects of the device are ensured.

The sewage treatment system comprises a sewage collection tank, an outlet of the sewage collection tank is communicated with a dosing pipeline, the dosing pipeline is connected with a clarification tank, supernate of the clarification tank is communicated with a biochemical tank, the bottom of the clarification tank is communicated with a sludge blending tank, the biochemical tank is communicated with a primary sedimentation tank, and the primary sedimentation tank is communicated with a secondary sedimentation tank. The third sedimentation tank is provided with a water outlet, the bottom of the first sedimentation tank, the bottom of the second sedimentation tank and the bottom of the third sedimentation tank are communicated with the sludge blending tank, the sludge blending tank is communicated with the plate filter press, the plate filter press is communicated with the sewage collection tank, the sewage treatment system comprises a reclaimed water recycling device and an intermediate tank, the second sedimentation tank is communicated with the intermediate tank, and the intermediate tank is communicated with the third sedimentation tank. The middle tank is provided with a reuse water port, a concentrated water pipeline of the reclaimed water reuse device is communicated with the Fenton reaction device and the clarification tank, the Fenton reaction device is communicated with the tertiary sedimentation tank, and the middle tank is higher than the reclaimed water reuse device. According to the application, the reclaimed water reuse device still has enough inlet water when the water inflow fluctuates, and it is guaranteed that discharge reaches the standard.

The application discloses a kind of dispersing water supplementing devices for coastal plain river network direct ammonia oxidation denitrification of reclaimed water, including the pretreatment tank, direct ammonia oxidation device and water supplementing device connected in sequence, the upper electrode and lower electrode with longitudinal alignment hole are horizontally arranged in funnel-shaped desalination settlement area of the bottom of pretreatment tank, aeration disc is arranged at the top of desalination settlement area, flocculating agent storage tank is arranged in the upper part of pretreatment tank, its injection pipe is immersed below water surface, desalination settlement area is connected with direct ammonia oxidation device by communicating pipe, and the filler filled with direct ammonia oxidation microorganism is filled in the inside of direct ammonia oxidation device, the bottom of direct ammonia oxidation device is connected with water supplementing device, and water supplementing device is connected with a plurality of primary water distribution branch pipes through water distribution main pipe.The device can realize the maximization of direct ammonia oxidation unit denitrification efficiency through water supplementing front end pretreatment and water supplementing tail end treatment, and the maximization of coastal plain river network water supplementing benefit is realized through the designed dispersing water supplementing device.

The utility model discloses a modularized rain sewage diversion box with a self-cleaning function, which comprises a diversion rainwater box, a module partition plate is correspondingly arranged in the diversion rainwater box, and the interior of the diversion rainwater box is divided into a precipitation cavity and a filtering treatment cavity by the module partition plate. According to the utility model, the interior of the diversion rainwater tank is divided into the precipitation cavity and the filtering treatment cavity by the module partition plate for respectively precipitating and filtering, so that reclaimed water and clean water can be conveniently treated and used, and the two backwashing cleaning pieces can be externally connected with an external water source for respectively backwashing the precipitation cavity and the filtering treatment cavity; the water filtering part and the flow guide control part are not prone to being blocked, dirt and impurities can be circularly cleaned and filtered through the filtering and cleaning tank, water is saved while self-cleaning is convenient, the device is convenient to carry out modularized split-flow water outlet, reclaimed water outlet and clean water outlet, the application range is large, the self-cleaning backwashing effect is good, cleaning is convenient, and water is saved.

A water distribution regulation method for reclaimed waterway landscape environment based on algae risk control, comprising: according to the water source characteristics of seasonal river landscape environment water and the hydraulic characteristics of river water, based on the algae growth curve of indicative algae species, controlling algae risk with nitrogen-phosphorus ratio and water replacement rate as control indicators; based on the nitrogen-phosphorus ratio and water replacement rate, constructing a joint regulation model for water-quantity and water-quality of the river incorporating reclaimed water; based on the joint regulation model, optimizing the nitrogen-phosphorus ratio of the river water environment with the indicative algae species; based on the optimized nitrogen-phosphorus ratio, optimizing the joint regulation model; and utilizing the optimized joint regulation model to perform joint regulation of water quantity and water quality.

The utility model discloses a multistage AO-MBR coupled reclaimed water treatment device which comprises an integrated box body, the interior of the integrated box body is sequentially divided into an anoxic tank, an anaerobic tank, an aerobic tank and an MBR process tank from left to right by partition plates, the anoxic tank, the anaerobic tank, the aerobic tank and the MBR process tank are communicated with one another, and a sewage input pump is fixedly mounted at the top of the integrated box body; an output part of the sewage input pump is mutually communicated with the interior of the anoxic tank, an input end of the sewage input pump is communicated with an external blow-off pipeline, a frame is fixedly mounted in the MBR process tank, and MBR membrane pieces which are arranged at equal intervals are inserted into the frame. According to the utility model, the external flushing assembly and the bidirectional pressurizing mechanism are arranged, so that synchronous back flushing and external flushing are carried out on the MBR membrane, the cleaning efficiency is improved, stains outside the membrane are easy to fall off during back flushing, the surface of the membrane is cleaned more thoroughly and efficiently, and the operation efficiency of equipment is improved at the same time.

The utility model relates to the related technical field of reclaimed water treatment, in particular to a zero-discharge reclaimed water recycling device which comprises a base and a pretreatment mechanism, the pretreatment mechanism is arranged on one side of the surface of the base, a biological treatment mechanism is arranged on one side of the surface of the base, and a disinfection mechanism is arranged at one end of the base. According to the reclaimed water recycling device based on zero emission, through the arrangement of the pretreatment mechanism, firstly, reclaimed water is introduced into the water inlet, then a control valve on the water inlet is opened, the reclaimed water enters the first box body through the water inlet, and at the moment, a grating in the water inlet filters particles in the reclaimed water for the first time; when water in the first box body rises to the first filter screen, the first filter screen arranged in the two layers can enter the reclaimed water in the first box body for secondary filtration, when the water level completely overflows the first filter screen, the water pump on the first connecting pipe is opened, the reclaimed water above the first filter screen can be pumped away, and pretreatment of the reclaimed water is completed.

The utility model discloses a kind of garden reclaimed water efficient purification treatment devices, it is related to sewage treatment equipment technical field, including primary filter, water distribution switching pool and multiple disinfection pools connected in turn in parallel. The primary filter is equipped with multistage inclined grid plate, its filter hole is gradually reduced along water flow direction aperture, and configuration sundry intercepting box automatic collection slide sundry;Sludge intercepting mechanism is discharged by pluggable intercepting plate in operation. The water distribution switching pool adopts servo motor driving pipeline switching ring, and the closed-loop control of combination electric type proximity sensor and induction rod, accurate switching disinfection pool water supply path. The present application solves the problem that traditional device needs to stop machine for cleaning sundry sludge, disinfection unit maintenance interrupts process, realizes filter impurity online cleaning, sludge dynamic discharge and disinfection pool zero-stop switching, significantly improves the continuity and operating efficiency of garden reclaimed water treatment.

The utility model discloses a recovery device for ceramic surface treatment wastewater, which is characterized in that a first treatment station is communicated with a first-stage filter vat through a diaphragm pump, the first-stage filter vat is communicated with a second-stage filter vat, a second pipeline connected with the second-stage filter vat is provided with a first valve, and the first valve is arranged between a reclaimed water tank body and a second treatment station; the reclaimed water tank body is communicated with a quartz sand tank through a water suction pump, the quartz sand tank is connected with an activated carbon tank, the activated carbon tank is communicated with a first RO membrane filter through a multi-stage centrifugal pump, the first RO membrane filter is connected with a second RO membrane filter, a second valve is mounted on a first pipeline connected with the second RO membrane filter, and the second RO membrane filter is communicated with the pure water tank body; and the pure water tank body is communicated with a third treatment station through a pressure pump and a third pipeline. The wastewater treatment device disclosed by the utility model has the advantages that new chemical substances are prevented from being introduced into water, filtering procedures are reduced, the equipment cost is reduced, the wastewater circulation speed is accelerated, and the wastewater circulation efficiency is improved.

The application provides a recycled water irrigation system based on ultraviolet peroxo organic acid combination and a water treatment method. The system comprises a shell, a POA dosing tank and a control unit. The lower part of the shell is provided with a water inlet, and the upper part is provided with a water outlet. The water inlet is provided with a lifting pump. A glass liner is arranged in the shell. The interior of the glass liner is divided into a first chamber, a second chamber and a third chamber which are sequentially communicated by a baffle. A grid is arranged in the first chamber. The inner wall of the first chamber is provided with spiral flow guide lines. An ultraviolet light intensity sensor is arranged in the second chamber. The top of the third chamber is provided with a UV-Vis spectrometer with a built-in quartz cuvette. A nozzle, a stirring mechanism, a spiral mixer and a glass electrode pH sensor are arranged in the third chamber. The bottom of the third chamber is provided with an ultraviolet lamp. The system solves the safety and applicability problems of direct irrigation of recycled water through the synergistic effect of ultraviolet irradiation and oxidation.

The utility model discloses a renewable waterway system and a water purifier, the renewable waterway system comprises: a pipeline system, the pipeline system is provided with a water storage tank and at least two electrodialysis filter elements with an ion adsorption function, raw water can be produced by any electrodialysis filter element and then is discharged, and a part of pure water can be distributed to flow into the water storage tank for storage; under the working condition of electrodialysis filter element regeneration, in the early stage of regeneration, raw water reversely flows through the electrodialysis filter element to be regenerated and wastewater is discharged, and in the later stage of regeneration, pure water stored in the water storage tank reversely flows through the electrodialysis filter element to be regenerated so as to wash the electrodialysis filter element; the at least two electrodialysis filter elements are arranged in a gradient manner according to the water production quantity difference value A, and when any electrodialysis filter element is regenerated, at least one electrodialysis filter element produces water to discharge water. The regeneration of the electrodialysis filter element can be realized, and the real-time water supply of the water purifier can be ensured, so that the water demand of a user is ensured.

The invention discloses a watershed multi-region water resource competition relationship dynamic quantification and risk early warning method and system. The method comprises the following steps: determining regions and departments participating in water resource competition in a watershed; collecting data over the years of water supply amount, water consumption amount, population amount and economic development level of each region and environmental influence data of geographic position, climate change and renewable water resource amount; constructing a competition intensity matrix, and identifying key competition area pairs; constructing and adopting a parameter inversion method to solve a competition coefficient in the multi-region water resource competition differential dynamical model; dynamically quantifying the influence degree, direction and ecological relationship type of inter-regional water resource competition based on a set competition and cooperation intensity grade, and analyzing a water resource competition pattern between drainage basin regions; and setting different scenes in the future, inputting driving parameters into the calibrated multi-region water resource competition differential dynamic model, simulating and predicting the development situation of the water resource competition relationship in different scenes in the future, and carrying out risk monitoring.

The utility model discloses reclaimed water recycling equipment based on multi-medium tank filtration and backwashing, which comprises a mounting rack, a treatment mechanism and a driving mechanism are arranged on the mounting rack, the treatment mechanism comprises a treatment assembly, the treatment assembly comprises a first connecting rod, the first connecting rod is fixedly mounted on the inner wall of the mounting rack, and the first connecting rod is fixedly mounted on the inner wall of the mounting rack. A pretreatment cylinder is arranged at one end of the first connecting rod, a first outlet pipe is arranged at the bottom end of the pretreatment cylinder, a second connecting rod is fixed to the inner wall of the mounting frame, a filtering tank is arranged at one end of the second connecting rod, a first guide pipe is fixedly mounted at the top end of the filtering tank, and one end of the first guide pipe is communicated with the first outlet pipe. By arranging the treatment mechanism, reclaimed water can be pretreated, filtered and sterilized, follow-up use of the reclaimed water is facilitated, by arranging the driving mechanism, the purposes of stirring the reclaimed water in the pretreatment barrel and driving the ultraviolet germicidal lamp to rotate can be achieved at the same time, and the treatment efficiency can be improved.

Based on the reclaimed water low-source high-peak water supply technology under the AI digital condition, the system breaks through the limitation of a centralized water supply mode of a traditional reclaimed water system by surrounding five core functions of multi-water-source collaborative water taking, intelligent pipe network scheduling, distributed water storage adjustment, nearby multi-water-quality water supply and automatic control system linkage; the modular and distributed design concept is innovatively introduced, and the AI algorithm and the Internet of Things sensing technology are combined, so that intelligent linkage and on-demand adjustment of the whole process from water taking, processing, conveying, water storage to water supply are achieved.

The application discloses a kind of water-soluble polyester desizing wastewater-PVA wet spinning wastewater synergic treatment method, by mixing high COD, high alkaline water-soluble polyester desizing wastewater and high salt, high acidic PVA wet spinning wastewater, combine temperature and water-soluble polyester sizing wastewater regulation, adjust the system pH and complementarily provide the required additive between the two, then continue through high density precipitation tank, ozone oxidation treatment, biological aerated filter, high-efficiency fiber filtration, twice reverse osmosis treatment, nanofiltration membrane filtration and frozen crystallization treatment, significantly reduce the COD and salt content in wastewater, obtain the reusable reclaimed water.The application realizes the effective treatment of water-soluble polyester desizing wastewater and PVA wet spinning wastewater without adding acid or base to adjust pH and without adding other additives, reduces the processing cost.

The utility model relates to the technical field of sewage treatment equipment, in particular to reclaimed water recycling equipment for an industrial sewage treatment plant, which further comprises a multi-treatment recycling assembly, the multi-treatment recycling assembly comprises a coarse screen, a lifting pump room, a fine screen and an aeration grit chamber, the lifting pump room is detachably connected with the coarse screen and is positioned on one side of the coarse screen, and the fine screen is positioned on the other side of the coarse screen. The fine grid is detachably connected with the lifting pump room and located on the side, away from the coarse grid, of the lifting pump room, the aerated grit chamber is detachably connected with the fine grid and located on the side, away from the lifting pump room, of the fine grid, and the multi-treatment recycling assembly is additionally arranged, so that the problem that existing industrial sewage treatment equipment is difficult to meet the requirements of various recycling scenes is effectively solved; not only is the waste of water resources caused, but also the water consumption cost and the environmental protection pressure of enterprises are increased.

The utility model provides a sand-gravel waste water treatment and slurry secondary efficient dehydration system which comprises a fine sand recovery device, and the sewage outlet end of the fine sand recovery device is connected with a sewage concentration system through a first sewage pump; a sludge collecting device is arranged in the sewage concentration system, an outlet of the sludge collecting device is connected with a mud buffer tank through a mud pump, and supernate in the sewage concentration system is connected with a reclaimed water pool through an overflow pipe; a three-way joint is mounted at the bottom of the slurry buffer tank, one end of the three-way joint is connected with the slurry dehydration device, and the other end is connected with the filter press; a sewage outlet end of the slurry dehydration device is connected with a mixer of the sewage concentration system; and a filtrate outlet of the filter press is connected with the reclaimed water tank. According to the system, the vibration dehydration device is additionally arranged at the rear end of the slurry concentration treatment process, so that the problem of recycling fine solid particulate matters with the particle size of 0.03-0.075 mm in the sand-gravel waste water can be effectively solved.

The utility model provides a building reclaimed water recycling device which comprises a first fixing plate and a second fixing plate, a double-cylinder mounting frame is movably arranged between the first fixing plate and the second fixing plate through an adjusting mechanism, and the adjusting mechanism comprises a two-way screw. And the two-way screw rod is rotationally mounted at the inner center positions of the first fixing plate and the second fixing plate in a limiting manner. An adjusting disc is adjusted through a two-way screw rod, and the adjusting disc is used for adjusting the lifting of a sealing disc through a fixing rod, so that the sealing disc can be separated from the double-cylinder mounting frame, the double-cylinder mounting frame can be rotationally adjusted, and a first filter cylinder and a second filter cylinder are taken out from the interior of the double-cylinder mounting frame; the first filter cylinder and the second filter cylinder can be conveniently taken out and impurities can be cleaned, so that the practicability of the device can be improved; the sealing disc and the double-cylinder mounting frame can be sealed through the bidirectional screw rod, the adjusting disc and the fixing rod, so that water can be conveniently filtered through the double-cylinder mounting frame, the first filter cylinder and the second filter cylinder, and reclaimed water can be conveniently recycled.

The invention provides a method for removing total copper, total phosphorus and COD (Chemical Oxygen Demand) in electroplating complexing wastewater. According to the method, the electroplating complexing wastewater is obtained; sequentially carrying out primary physical and chemical precipitation operation, Fenton advanced oxidation operation and secondary physical and chemical precipitation operation on the electroplating complexing wastewater to obtain a secondary separation solution; the molar ratio of the H2O2 in the Fenton advanced oxidation operation to the total copper in the electroplating complexing wastewater is (1-3): 1, and the concentration of the H2O2 is 100-500 mg / L; carrying out chelation reaction on the secondary separation liquid by adopting a low-COD recapturing agent; and carrying out third physicochemical precipitation operation on the electroplating complex wastewater subjected to chelation reaction to obtain recycled water meeting emission requirements. According to the method, on the premise of ensuring that a heavy metal-non-organic phosphorus strong complex Fenton advanced oxidation reaction is met with a small amount of H2O2, total copper, total phosphorus and COD in the electroplating complexing wastewater are removed more deeply, the total copper concentration of reclaimed water is stabilized to be 0.5 mg / L or below, the total phosphorus removal rate is larger than 95.0%, and the COD removal rate is larger than 89.0%, so that the increasingly strict requirements are met.