49 results about "Dissolved air flotation" patented technology

The invention provides an ozone dissolved air flotation system and a dissolved air release control method thereof. The system comprises a gas dissolving unit, an ozone floatation unit, a detection module, a control module and an adjusting module, the gas dissolving unit is used for transmitting generated data to the detection module; the ozone air floatation unit transmits the generated flow, pressure and water quality parameter data of an air floatation tank to the detection module; the detection module monitors the running states of the air dissolving process and the air floatation process in real time, and transmits the collected real-time data to the control module; the control module performs comprehensive judgment on the data through the core algorithm unit according to the sewage treatment mechanism model, the LSTM neural network and the fuzzy control logic, and generates a corresponding control instruction; and after receiving the instruction of the control module, the adjusting module adjusts the corresponding equipment through an execution element. According to the invention, multi-parameter dynamic coordinated regulation and control of the ozone dosage and the dissolved gas pressure can be realized, and the ozone utilization rate and the system response speed are obviously improved.

This utility model discloses an integrated device for treating leachate from a waste transfer station, comprising a pretreatment unit, a biochemical unit, and a sludge treatment unit. The pretreatment unit includes a wastewater collection tank, a homogenization tank, and a dissolved air flotation (DAF) tank. The biochemical unit includes an anaerobic preparation tank, an anaerobic reactor, a two-stage AO reactor, and a secondary sedimentation tank. The sludge treatment unit includes a sludge storage tank and a screw press dewatering machine. The wastewater collection tank, homogenization tank, DAF tank, anaerobic preparation tank, anaerobic reactor, two-stage AO reactor, secondary sedimentation tank, sludge storage tank, and screw press dewatering machine are sequentially connected via pipelines. This utility model achieves full-volume treatment of leachate from waste transfer stations, and has advantages such as significant treatment effect, no secondary pollution, low operating cost, low energy consumption, and saving land area.

This invention belongs to the field of multi-stage treatment of textile wastewater, specifically a high-efficiency and energy-saving textile wastewater treatment device. It includes an equalization tank with a wastewater pipe located at the rear end of the equalization tank. Two separation tanks are formed inside the equalization tank and connected by multiple connecting pipes. A rotating stirring platform is located at the bottom inner side of each separation tank, and multiple fan blades are fixed to the outer side of the stirring platform. A dissolved air flotation module is installed at the front end of the equalization tank. This design not only achieves multi-stage treatment of wastewater but also effectively adapts to the treatment process of multiple batches of different textile wastewater. It ensures that the pollution level of the wastewater injected into the treatment equipment is the same each time, allowing subsequent treatment devices to operate smoothly. Furthermore, it controls the wastewater discharge into subsequent equipment at a constant rate, reducing the problem of excessive load on the treatment device when the water volume is high.

The invention discloses a multi-effect demulsification treatment method and system for cold rolling oily wastewater, firstly, a multi-effect demulsification process of'acidification demulsification-neutralization flocculation 'is innovatively adopted, not only is acid-containing wastewater of a cold rolling pickling section or an acid regeneration section used as an acidic demulsifier to realize'treatment of waste by waste' and cost reduction, but also the treatment of waste by waste is realized through subsequent neutralization, aeration and flocculation, so that the treatment efficiency is improved. The demulsification efficiency is obviously improved. In addition, a grading air flotation strategy of cavitation air flotation and pressurized dissolved air flotation is adopted, so that thorough separation and excellent effluent quality are ensured. The cold rolling oily wastewater with different concentrations and compositions can be efficiently treated by accurately controlling key parameters such as pH, iron ion concentration and medicament adding amount. Finally, through the multi-effect synergistic effect, efficient demulsification and oil-water separation of different types of cold rolling oil-containing wastewater are achieved, the treatment efficiency is improved, the operation cost is reduced, stable effluent quality is ensured, and the oil removal rate of the cold rolling oil-containing wastewater can reach 92-99%.

The utility model relates to the technical field of chemical engineering, in particular to an air floatation oil removal system which comprises a dissolved air tank, an air floatation tank, a releaser, a tank inlet line, a tank outlet line and a purging line, and the dissolved air tank is arranged outside an air floatation oil removal device; the air floatation tank is arranged in the air floatation oil removal device; the releaser is arranged at the bottom of the air floatation tank; one end of the tank inlet line is connected to an inlet I of the dissolved air tank, the other end of the tank inlet line is connected to an industrial air pipe network, and a dissolved air tank hand valve is arranged on the tank inlet line; one end of the tank outlet line is connected to an outlet of the dissolved air tank, and the other end of the tank outlet line is connected to the releaser at the bottom of the air floatation tank. The releaser is prevented from being blocked by impurities such as sludge and rust, the releaser can be conveniently put into use next time, a manual disassembly and cleaning method is omitted, and the process that dissolved air flotation is quickly put into use is ensured.

The invention provides a pressurized dissolved air flotation process pressure stability detection system and a control method, and belongs to the technical field of water treatment. The system comprises a pressure acquisition module, a data transmission module, a control module, an execution module, an alarm module and a man-machine interaction module. High-precision pressure sensors are arranged at an outlet of a pressure pump, the interior of a dissolved air tank and an inlet of a dissolved air releaser, and pressure data of key nodes are collected in real time; the control module automatically analyzes the pressure state based on a preset stable interval, and is linked with a pressure pump frequency converter, a dissolved air tank exhaust / water replenishing valve and a releaser regulating valve to perform multi-stage regulation and control; and when the pressure exceeds the limit and triggers an emergency threshold value, the system automatically gives an alarm and executes protective shutdown. According to the invention, high-precision and real-time monitoring and rapid closed-loop control of pressure parameters are realized, the air dissolving efficiency and the pollutant removal rate are remarkably improved, the operation stability and safety of the system are enhanced, and the system is suitable for an air flotation treatment process under complex water quality conditions such as seawater desalination and industrial wastewater.

The invention discloses a device and a process for producing biogas and returning biogas manure to fields through anaerobic fermentation of wool scouring wastewater, and belongs to the technical field of industrial wastewater treatment and resource utilization. The device comprises a pretreatment unit, a two-stage anaerobic fermentation unit, a biogas recycling unit and a biogas manure returning unit which are communicated in sequence, the pretreatment unit comprises a dissolved air flotation oil removal tank, a tempering acidification tank and a horizontal spiral centrifuge, the two-stage anaerobic fermentation unit comprises a hydrolysis acidification tank and an efficient internal circulation anaerobic reactor, and the biogas recycling unit comprises a biogas purification assembly and a waste heat utilization assembly. The biogas manure returning unit comprises a solid-liquid separation assembly, a compost maturing assembly and a precise irrigation assembly; according to the process, wool fat and suspended solids in wool scouring wastewater are removed through pretreatment, biogas is produced through two-stage anaerobic fermentation, the biogas is recycled after being purified, and biogas manure is prepared from anaerobic effluent and accurately returned to the field; the method realizes full resource utilization of the wool scouring wastewater, the COD removal rate is greater than or equal to 95%, the biogas yield is increased by more than 30%, secondary pollution is avoided, and the operation cost is low.

This utility model belongs to the field of dissolved air flotation (DAF) devices, specifically a scum scraping mechanism for a DAF device. It addresses the problems of existing scum scraping devices where the scraping depth is not adjustable, making it difficult to adjust the scraping depth according to the actual accumulation of scum, thus failing to completely remove scum and affecting effluent quality. Furthermore, if the scraping depth cannot be precisely controlled, the scum layer is easily disturbed excessively, causing some scum to re-mix into the water, reducing the flotation treatment effect. The proposed solution includes a DAF device body with a top frame welded to its top side, and a scum storage chamber inside the body. In use, this utility model allows the scraper plate to move up and down for adjustment, facilitating the adjustment of the scraping depth according to the actual accumulation of scum, thereby thoroughly removing scum. It also enables precise adjustment of the scraper plate, preventing excessive disturbance of the scum layer and the re-mixing of scum into the water.

The utility model relates to the technical field of air flotation deslagging, in particular to a self-adaptive deslagging air flotation device which comprises an air flotation tank and a deslagging structure, the deslagging structure is fixedly mounted above the air flotation tank and comprises a driving assembly, a foam scraping assembly and a deslagging assembly, the deslagging structure is fixedly mounted above the air flotation tank, and the driving assembly is fixedly mounted above the air flotation tank. A foam scraping assembly is fixedly mounted on the surface of the slag removal structure, a slag removal assembly is fixedly mounted on the surface of the driving assembly, and the driving assembly drives the foam scraping assembly to scrape foam and then makes contact with the slag removal assembly to generate elastic displacement to achieve self-cleaning slag removal. The problem that chippings and impurities are easily attached to an existing air floatation deslagging device in the scraping process and then enter an air floatation tank for the second time, and pollution is caused is solved.

The utility model provides a kind of electrolytic flocculation type dissolved air flotation sewage treatment all-in-one machine, it is related to adhesive production technical field, including shell, the outer surface left side bottom end of shell is inserted with sewage tank, the outer surface front section right side of shell is equipped with metal door, the outer surface middle part of metal door is equipped with observation port, the inside fixed mounting of sewage tank is equipped with mounting plate, AI edge calculation box, high-frequency pulse direct current power supply and cyclone dissolved air cavity are integrated into upper and lower layered structure, utilize upper baffle to separate electrical area and processing area, while using the integrated stamping process that sewage tank and cyclone dissolved air cavity share side wall, make equipment volume compared with traditional electrolysis-air flotation split device greatly reduce, venturi pneumatic refluxer is integrated with dissolved air cavity bottom, by 0.3-0.6MPa pressure difference self-driving operation, replace traditional electric reflux pump, further compress equipment size, effectively solve the problem of equipment volume in prior art too large.

1. The name of the design product: air floatation dissolved gas device. 2. The use of the design product: air floatation dissolved gas device is the core equipment of air floatation sewage treatment. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view 1. 5. The back of the design product is not easy to see or not visible during use, omit the rear view.

The invention provides a method and a system for treating MVR distilled oil sludge wastewater, and belongs to the technical field of oil sludge wastewater treatment. Comprising the following steps: sequentially carrying out pressurized dissolved air flotation treatment, extraction treatment, acidification treatment until the pH value is 3.0-3.5, electro-Fenton oxidation treatment, deep oxidation treatment, pH value adjustment to 7.0-8.5 and addition of a flocculating agent for precipitation separation, electrocatalytic oxidation treatment, gravity settling separation and microbial degradation treatment on the MVR steamed oil sludge wastewater. According to the method, the MVR distilled oil sludge wastewater is pretreated, and after sequential treatment of the pretreatment steps, the BOD5 / CODcr ratio of the wastewater is increased to 0.3 or above, so that the microbial biodegradability of the wastewater is fundamentally improved, and the method can be suitable for subsequent microbial degradation treatment. According to the invention, the overall decontamination effect of the wastewater treatment process is improved, the overall treatment cost of the wastewater is reduced, and the effluent at the tail end of the microbiological degradation treatment process can stably meet the discharge requirements of the national GB / T31962-2015 Urban Wastewater Nano Tube Limit.

The invention relates to the field of sewage treatment, in particular to modular container type protein wastewater treatment equipment which comprises a base and an air floatation tank, the air floatation tank is mounted at the top of the base and provides a sewage treatment space, an overhaul platform is mounted at the front end of the base, and an air dissolving system, a slag scraper and a stirring coagulation area are sequentially mounted at the top of the air floatation tank from left to right. After sewage enters the stirring coagulation area, an added flocculating agent is fully mixed in the sewage, fine suspended particles in the sewage are coagulated into large floccules, and a plurality of release pipe joints are mounted at the bottom of the front surface of the air floatation tank at equal intervals from left to right. According to the invention, the problem of blockage is solved through the two releasers which are designed in a targeted manner, and automatic blockage prevention can be realized without shutdown; the first releaser is linked with the sensing unit through the pressure relief assembly, when the air outlet hole is blocked by hard impurities, the rising air pressure in the shell can push the piston to drive the rack to conduct transmission, the screw rod drives the cover plate to ascend to expand the air outlet hole, and the impurities are automatically discharged under the action of the air pressure.

The present application relates to a kind of high-efficiency dissolved air flotation sewage treatment equipment, it relates to the technical field of sewage treatment, it includes box, slagging mechanism, sludge discharge mechanism, water outlet pipe and water inlet pipe, slagging mechanism includes first motor, transmission chain, transmission wheel, mounting seat and scraper, multiple transmission wheels are rotatably installed on the box, transmission rod is fixedly installed between opposite two transmission wheels, first motor is fixedly installed on the upper end of the box, the output shaft of first motor is drivingly connected with one of transmission wheel, transmission chain is sleeved on transmission wheel, multiple mounting seats are fixedly installed on transmission chain, the two ends of mounting seat are each fixedly connected with one transmission chain, scraper is fixedly installed on mounting seat, the end of box close to first motor is fixedly installed with slag collection box, slag collection box one side is fixedly installed with slag collection inclined platform.The present application can realize reverse scraping dross, improve water purification efficiency simultaneously.

The present invention pertains to a heterogeneous mixture separation process and to use thereof for the detection of gastrointestinal parasites in humans and animals. The process proposed herein, in an unprecedented manner, comprises steps for preparing faecal material, saturating water with dissolved air, employing surfactants and chemical polymers with positive and negative ionic forces, separating the processed faecal material by means of dissolved air flotation, and using the material of interest for microscopic examination.

The invention relates to the technical field of dissolved air floatation tanks, in particular to an air floatation tank contact area structure and device for removing algae and an algae removal method.The air floatation tank contact area structure comprises an upper-layer dissolved air water pipe, a lower-layer dissolved air water pipe, an upper-layer dissolved air releaser, a lower-layer dissolved air releaser and at least two layers of folded plates, the upper-layer dissolved air releaser is arranged in the middle of the contact area, and the two layers of folded plates are sequentially arranged in the middle of the contact area in the vertical direction. The two dissolved air releasers are arranged in a layered mode, dissolved air water is released at different depths, the bubble density near outlets of the releasers is reduced, the double-layer dissolved air release system generates bubble distribution of lower-layer large bubbles and upper-layer small bubbles through the releasers of different sizes, and the collision frequency and the adhesion efficiency of microbubbles and floc in a contact area can be remarkably improved. By optimizing the design of the double-layer air-dissolved water releaser and controlling gradient turbulent fluctuation of symmetrical / staggered folded plates, efficient combination of microbubbles and algae floc is realized.

The utility model relates to the technical field of wastewater treatment devices, and discloses a comprehensive treatment system for paint spraying wastewater, which comprises the paint spraying wastewater, a paint spraying wastewater collection tank, an oil separation sedimentation tank, a dissolved air flotation machine, an SBR (sequencing batch reactor) reaction tank, a sludge tank and a plate-and-frame filter press, and gas is injected into the paint spraying wastewater collecting tank. According to the comprehensive treatment system for the paint spraying wastewater, sewage is collected through the paint spraying wastewater collecting tank, meanwhile, the sewage is settled through the oil separation settling tank, demulsification and oil removal treatment is conducted through the dissolved air flotation machine, aeration is conducted on the sewage through the SBR reaction tank, it is ensured that sewage treatment is more sufficient, and meanwhile solid-liquid separation can be conducted on the treated sewage through the filter pressing device; therefore, the paint spraying wastewater is effectively treated, the treatment investment cost is saved, and up-to-standard discharge is realized.

The invention discloses a bobbin paper waste slurry treatment device and method, and belongs to the technical field of papermaking wastewater treatment. The method comprises the following steps: calculating a ratio of a comprehensive pollution load index to a characteristic chromaticity component based on COD, chromaticity and an ultraviolet characteristic absorption value which are monitored in real time; the graphene-based composite catalytic material is introduced into a dissolved air flotation unit to form catalysis-air flotation integrated treatment, and the reflux ratio, the material circulation rate and online electrochemical regeneration are dynamically adjusted; introducing the effluent into a biochemical system, and dynamically adjusting the addition carbon-nitrogen ratio of an external carbon source and the sludge age according to the removal rate of the characteristic chromaticity components and the biodegradability index; and finally applying a micro electric field to the tail water, and adjusting the intensity and frequency of the electric field based on the chromaticity and turbidity of effluent to perform deep purification. The full-process intelligent regulation and control and efficient degradation of the bobbin paper waste pulp are realized, the removal effect on chroma and refractory organic matters is remarkable, and the system is stable in operation, low in cost and free of secondary pollution.

The application belongs to the technical field of wastewater treatment equipment, and particularly relates to a multi-stage wastewater treatment equipment for leather recycling and processing, which comprises a staged dissolved air flotation machine, the inner cavity of the staged dissolved air flotation machine is provided with a first-stage contact tank, a second-stage separation tank and a third-stage discharge tank, the inner wall top of the first-stage contact tank is fixedly connected with a fixing frame, the outer wall of the fixing frame is fixedly connected with a running motor one, the bottom outer wall shaft center of the running motor one is fixedly connected with an inner layer rotating rod, the outer wall of the end of the inner layer rotating rod away from the running motor one is fixedly connected with a connecting seat, the outer wall of the connecting seat is fixedly connected with multiple rotating plates, the rotating plates are arrayed and distributed, wastewater is input through the pressurized discharge of sewage to form liquid flow impact force, the liquid flow impact force drives the rotating plates to rotate around the connecting seat, and the arrayed and discharged micro air bubbles on the rotating plates can be uniformly distributed in the whole cavity of the first-stage contact tank.

The utility model discloses a dissolved air flotation machine, including: box body, flocculation zone, air flotation zone, collection zone, mixing device and transmission component, wherein flocculation zone, air flotation zone and collection zone are provided in the box body in proper order along the working direction, mixing device is provided in flocculation zone, transmission component is provided on box body, and the working end of transmission component is located in air flotation zone. According to the dissolved air flotation machine disclosed by the embodiment of the utility model, on one hand, the driving device is matched with the scraping device, so that suspended matters can be conveniently scraped through the scraping plate, and on the other hand, the suspended matters are prevented from being scraped to one side far away from the collecting area when the scraping plate moves in the opposite direction through the matching among the limiting rod, the limiting device and the limiting structure, so that the suspended matters are prevented from being scraped. And the operation is simple, and during cleaning, only a single scraper needs to be cleaned, so that time and labor are saved.

The utility model relates to the technical field of sewage treatment equipment, and discloses a vertical dissolved air flotation machine which comprises an air flotation machine main body and a scraping plate movably connected inside the air flotation machine main body through a chain, and a water storage tank is arranged inside the scraping plate. By arranging the water storage tank, when the scraper blade is soaked in water and moves, water below a scum layer can be collected in the water storage tank, then when the scraper blade rotates clockwise, water in the water storage tank can be sprayed out through the water outlet tank, the surface of the scraper blade is automatically flushed through flow guide of the flow guide plate, attached scum can be removed in time, and the service life of the scraper blade is prolonged. The scraping plate is kept clean, the stable slag scraping efficiency is maintained, normal operation of the air flotation machine main body is guaranteed, the scraping plate continuously and efficiently works, the probability of falling back to an air flotation tank is reduced, the water quality purification effect is guaranteed, separated scum is prevented from being mixed into liquid again, and the follow-up treatment difficulty and cost are reduced.

The present application relates to potassium dihydrogen phosphate preparation technical field, specifically to a kind of phosphorus dihydrogen potassium device oily wastewater recovery extractant process and its device, including cyclone pretreatment equipment, pressurized dissolved air flotation equipment and extractant regeneration equipment;Cyclone pretreatment equipment is equipped with feed inlet, light phase outlet and heavy phase outlet, the heavy phase outlet is connected to sedimentation tank;Pressurized dissolved air flotation equipment includes box, box is equipped with air float contact zone, air float separation zone and clean water tank in sequence;Cyclone pretreatment equipment's light phase outlet and the extractant collection tank are all connected extractant recovery tank, extractant recovery tank is connected the extractant regeneration equipment;Through cyclone pretreatment+micro-nano partial reflux pressurized dissolved air flotation+extractant regeneration synergistic technical scheme, accurately solved the emulsion of alcohol, amine extractant in wastewater during the preparation of refined phosphoric acid / phosphorus dihydrogen potassium by extraction method is difficult to break, recovery rate is low, wastewater cannot be reused, the core technical problem of high energy consumption.

The application discloses a kind of for tungsten wire wire cutting silicon wafer full-process wastewater treatment method, including cutting fluid wastewater into wastewater conditioning tank homogenization after entering anaerobic biological treatment unit, most of organic matter in wastewater is degraded and removed by anaerobic microorganism;Effluent enters fenton processing unit, part of refractory organic matter enters fenton reactor, and under the strong oxidation of hydroxyl radical, chain is broken, and fenton effluent enters comprehensive conditioning tank;At the same time, degumming and wafer cleaning wastewater adopts coagulation sedimentation and high-efficiency dissolved air flotation;Cutting fluid wastewater and degumming and wafer cleaning wastewater after respective pretreatment unit, with domestic wastewater and ROR concentrated water are mixed evenly and enter hydrolysis acidification tank;Finally, further reduce COD by aerobic microbial flora, and effluent is realized stable discharge after air floatation advanced treatment.This application has the advantages of simplifying process flow, saving investment and operating cost, improving wastewater treatment efficiency and effect, and ensuring the smooth discharge of wastewater.

This invention relates to a treatment system and method for wastewater containing high salt content and high concentration of recalcitrant organic matter, belonging to the field of wastewater treatment technology. It solves the problems of evaporator coking and high treatment costs for hazardous wastewater containing high salt content and high concentration of recalcitrant organic matter in existing methods. The treatment system includes: a dissolved air flotation tank, a comprehensive equalization tank, a biological selection tank, an anoxic tank, a first MBBR tank, a secondary sedimentation tank, a first air flotation filter, an advanced oxidation tank, a second MBBR tank, and a second air flotation filter, arranged sequentially along the material flow direction; it also includes an ozone pretreatment reverse osmosis brine device, the outlet of which is connected to the inlet of the comprehensive equalization tank. This achieves efficient, stable, reliable, and economical treatment of wastewater containing high salt content and high concentration of recalcitrant organic matter.

This invention relates to the field of dissolved air flotation (DAF) equipment technology, and more specifically, to a cylindrical DAF device. It utilizes a microbubble generator in conjunction with an air compressor to produce bubble-infused water. The material and the bubble-infused water are then mixed in a mixer and discharged into a container via a distributor to improve dissolved air efficiency. The device employs a container with a circular thin-walled upper section and a conical thin-walled lower section, combined with a rational component layout, to reduce the equipment's footprint. It fully utilizes the internal and external spaces of the enclosure. The exterior is designed as a clear water collection tank, where scum passes through to the discharge port. The internal structure, consisting of nested annular containers, increases the scum treatment area and enhances the flow capacity of the scum and microbubble-infused water, thus making efficient use of space.

This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system for industrial parks used to reduce pollutant emissions. The system includes an industrial wastewater treatment device and a domestic wastewater treatment device. The industrial wastewater treatment device includes, in sequence, an underground buffer tank, a demulsification reaction tank, a paper tape oil separator, a wastewater collection tank, a physicochemical flat-plate biological bed, a first dissolved air flotation tank, and a first sludge tank. The domestic wastewater treatment device includes, in sequence, a bar screen, an equalization tank, a domestic flat-plate biological bed, a second dissolved air flotation tank, and a second sludge tank. The first and second dissolved air flotation tanks are connected via pipelines and output as treated wastewater that meets emission standards. This system separates industrial and domestic wastewater treatment, specifically by converting the original MBR membrane tank into a flat-plate biological bed and the primary treatment tank into a flat-plate biological bed. Carbon removal / nitrification reactions are achieved through the biofilm carrier (packing material), improving the efficiency of organic matter degradation and reducing the COD, ammonia nitrogen, and sludge volume in the effluent.

This invention relates to a biochemical treatment method for high-concentration organic wastewater generated during the preparation of soybean products. The specific steps are as follows: Soybean product organic wastewater collected by a grating in a collection well is transported to a coagulation sedimentation tank. Its pH is adjusted, and a compound agent is added for coagulation and sedimentation treatment. After removing sludge, the wastewater enters the next process. The compound agent, by weight, comprises 22-33 parts polyaluminum chloride, 1-3 parts polyacrylamide, 54-70 parts quaternary ammonium cationic demulsifier, 6-12 parts modified straw biochar, and 1-2 parts Streptococcus thermophilus YXX1. The treated wastewater is then subjected to dissolved air flotation to remove scum and transported to a black film anaerobic digester for anaerobic fermentation. The effluent from the black film anaerobic digester is directly used for irrigation or discharged after further treatment. This invention, through the combination of compound agent treatment and anaerobic fermentation in a black film anaerobic digester, achieves high biogas yield and output, with high methane content. When the clean water is discharged, the COD is low. cr The values ​​are all below 150 mg / L, making them environmentally friendly and safe.

A system and method for treating a liquid containing contaminants during oil production. The system and method including an inlet for feeding the liquid containing contaminants through an EOX reactor such that a coagulant is added, by passing a current through a fluid (electrocoagulation), to separate contaminants from the liquid and produce a coagulated liquid, an ozone generator for adding ozone to an ozone reactor to destruct hydrogen sulfide, and to further oxidize any remaining contaminants in the coagulated liquid to form an initially treated liquid, a Dissolved Air Flotation Tank (DAF) for the removal of bulk precipitated suspended solids, floc, oils and greases, a pump for pumping the treated liquid from the DAF tank to a filtration mechanism for filtering residual oils and contaminants from the treated liquid to form a filtered liquid.

The utility model discloses a kind of dissolved air flotation machines, including body, separation zone is provided in the body, the separation zone upper portion is provided with slag scraping device, the slag scraping device includes conveying chain, slag scraping motor, transmission, slag scraping plate, plate cleaning device, the conveying chain is installed with body by shaft and bearing seat, the slag scraping motor is fixed with body top, transmission is driven with conveying chain by transmission, the conveying chain is installed with multiple slag scraping plates, plate cleaning device is installed on the body at the tail end of the separation zone. The utility model is cleaned to the surface of the slag scraping plate passed by plate cleaning device at the tail end of the separation zone, and the scum and impurities on the slag scraping plate are scraped to the tail of the separation zone, it is convenient to push into pollution area after next time slag scraping plate passes, so that the scum and impurities of reciprocating slag scraping plate return to the initial end of the separation zone again and keep clean, increase the cleaning efficiency of scum and impurities, also avoid the return of impurities and increase the sediment accumulation phenomenon.

The utility model relates to dissolved air flotation technical field discloses a coagulation dissolved air flotation device, including the bottom plate, the bottom plate top fixedly connected with the air float box, the air float box inner wall both sides are rotatably connected with the stirring rod, the stirring rod outer wall is fixedly connected with a plurality of stirring vane, a plurality of air jets are fixedly connected with the stirring vane top, the air float box bottom end both sides are fixedly connected with the support frame, the support frame inner wall rear side is fixedly connected with the pipe head. In the utility model, the stirring vane and air jet are driven to rotate through the stirring rod, the sewage is stirred, the air pump is started simultaneously, the air pump supplies the gas to the pipe head through the connecting pipe and the shunt pipe, the gas enters the stirring rod through the pipe head, and finally is sprayed through the air jet, forms the micro air bubble, and the micro air bubble combines with the suspended solids and pollutants in the sewage, makes it float to the water surface, can more fully contact with the suspended solids and pollutants in the sewage, improves the sewage treatment efficiency.