337 results about "Coking wastewater" patented technology

The invention provides a low-cost metal modified electrode material, a preparation method and application, solves the problems that a carbon nitride material is difficult to recover and poor in sustainability, and improves the photoelectrocatalysis capability of an active carbon material. Further constructing a packed bed cathode coupled microbial fuel cell system; the treated industrial wastewater is high-salt coking wastewater from Anshan steel, a PEC-MFC system filled with electrogenesis microorganisms is used for realizing wastewater recycling and harmlessness, and energy-saving, high-efficiency and one-step treatment of the industrial wastewater is completed.

The utility model relates to a silicon and fluorine removal device for a coking wastewater zero-discharge membrane high-power concentrated solution. The silicon and fluorine removal device comprises a deep silicon removal unit, an alternate fluorine removal precipitation unit and an accurate fluorine removal unit which are sequentially connected in series, the deep silicon removal unit comprises a silicon removal reaction tank and a silicon removal sedimentation tank which are connected in series, a silicon removal stirrer is arranged in the silicon removal reaction tank, and a first flocculant adding device and a first liquid alkali adding device are arranged on the silicon removal reaction tank; the alternate defluorination sedimentation unit comprises a defluorination sedimentation tank, a defluorination stirrer is arranged in the defluorination sedimentation tank, effluent of the defluorination sedimentation tank is conveyed into the defluorination sedimentation tank, and a first sulfuric acid adding device is arranged on a pipeline between the defluorination sedimentation tank and the defluorination sedimentation tank; the precise defluorination unit comprises a second-stage defluorination reaction tank and a second-stage defluorination clarification tank which are connected in series, a water inlet pipeline of the second-stage defluorination reaction tank is provided with a second flocculant adding device and a second sodium hydroxide adding device, and effluent of the defluorination sedimentation tank is fed into the second-stage defluorination reaction tank.

The invention relates to the technical field of needle coke wastewater treatment, in particular to an oil-water separation system for needle coke wastewater treatment, which comprises a separation box, a box cover is slidably mounted on the upper side of the separation box, a rotating hole is formed in the upper side of the box cover, a separation mechanism is rotatably mounted in the rotating hole, and a cross rod is fixedly mounted on the side of a hollow column. And two scraping plates are fixedly installed on the lower side of the transverse rod, a medicine injection assembly is fixedly installed in an air conveying hole, and the air conveying hole is fixedly connected with a stirring pipe. The driving motor drives the second-stage bevel gear to rotate, the second-stage bevel gear drives the first-stage bevel gear to rotate, the first-stage bevel gear drives the second-stage bevel gear to rotate, the second-stage bevel gear drives the hollow column to rotate, the hollow column drives the first-stage pawl to move, the first-stage pawl is made to move clockwise, and full mixing and demulsification are achieved; the oil-water separation effect is improved.

The invention discloses a biomass-inorganic-organic ternary composite flocculant and a preparation method and application thereof, and belongs to the field of coking wastewater treatment.The preparation method comprises the steps that chitosan serves as a substrate material, glutaraldehyde serves as a cross-linking agent, and polyferric sulfate (PFS) and chitosan are subjected to chemical cross-linking to generate an intermediate product PFS and chitosan composite particles; then potassium persulfate is used as an initiator, graft copolymerization of acrylamide and methacryloyloxyethyl trimethyl ammonium chloride is initiated through hydroxyl on the surface of PFS-chitosan, a cationic branched chain is introduced, and a final product is obtained. Through multi-component cooperation and structural design, the defects that a traditional flocculating agent is not thorough in demulsification, large in sludge amount, unstable in floc combination and the like in coking wastewater treatment are overcome, and the flocculating agent is particularly suitable for treating oil pollutants in coking wastewater.

The invention discloses a demulsifier, and relates to the technical field of wastewater treatment, and the demulsifier comprises the following components in parts by weight: 58.5-79.5 parts of polyacrylamide, 3.5-6.5 parts of cationic organosilicon modified polyacrylamide, 14.5-35.5 parts of polyoxyethylene, 0.2-1.8 parts of ammonium sulfate, 0.1-0.5 part of Meso-tetramethyl-meso-tetra-p-aminophenyl calix [4] pyrrole, 1-3 parts of 1, 3-bis ((trihydroxymethyl) methylamino) propane, 1-3 parts of 1, 3-bis (trihydroxymethyl) methylamino) propane, 0.1-0.5 part of 1, 2, 3, 4-tetramethyl-1, 3, 4, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5-tetramethyl-1, 3, 5 The invention relates to a water-soluble hyperbranched polyamide resin paint, which is prepared from the following components in parts by weight: 0.3 to 0.8 part of 2, 3-bis (2-hydroxyethyl)-2-imidazolone, 0.1 to 0.3 part of water-soluble hyperbranched polyamide resin, 0.8 to 1.2 parts of lauryl hydroxyethyl imidazoline, 0.6 to 1 part of amphoteric organic ionic salt and 80 to 100 parts of water. The demulsifier is small in dosage, remarkable in normal-temperature demulsification effect, high in efficiency, wide in application range and capable of effectively achieving oil removal and demulsification of the coking wastewater.

The utility model provides a coking wastewater outlet device, which relates to the technical field of coking wastewater treatment and comprises a treatment barrel, a fixing ring, supporting legs, a box cover, a partition plate, a filter plate and a flocculant adding component. Liquid flocculants are added into the feeding pipe and enter the storage box, liquid in the storage box is finally discharged into the treatment barrel through the multiple sets of water outlet pipes under the action of the pump body, the motor drives the rotating shaft and the driving wheel to rotate, the driven wheel and the feeding pipe are further driven to rotate, and the liquid flocculants are discharged into the treatment barrel through the multiple sets of water outlet pipes. A plurality of groups of water outlet pipes rotate along with the rotation of the fixed pipe, so that a liquid flocculant is uniformly sprayed out in the treatment barrel, and a scraper plate continuously cleans the outer surface of a filter plate along with the rotation of the fixed pipe, so as to keep the filter plate unobstructed. And the filter screen is not provided with an effective cleaning mechanism, so that the phenomenon of blockage is easily caused.

The invention discloses a method for preparing a porous carbon material by recycling coal gasification slag and semi-coke wastewater, which comprises the following steps: by taking coal gasification fine slag as a carrier and semi-coke wastewater as a phenol source, carrying out flotation-acid leaching modification on the fine slag to purify a carbon-rich component and optimize the surface adsorption activity of the carbon-rich component; then fully adsorbing phenolic substances in the wastewater by utilizing the modified slag body; introducing a composite aldehyde cross-linking agent, and initiating an in-situ phenolic aldehyde polymerization reaction to generate a composite precursor; the precursor is subjected to high-temperature carbonization and alkali activation pore forming, and finally the porous carbon material with the characteristics of high specific surface area, rich graded pores and low ash content is prepared. According to the process, full-amount collaborative recycling of the two wastes is achieved, and the process is green and free of secondary pollution. The obtained material is high in carbon content and rich in defect structure and surface functional groups, shows excellent adsorption capacity and catalytic carrier performance, can be widely applied to the fields of deep purification of water pollutants, adsorption of volatile organic compounds, energy catalysis and the like, and has remarkable environmental protection benefits and resource economic values.

The application relates to a coking wastewater advanced treatment device, which comprises an aerobic tank, a horizontal shaft is arranged in the aerobic tank along the water flow direction, a plurality of coaxial rotating discs are arranged on the shaft at intervals, the rotating disc is hollow, the surface of the rotating disc is hollowed out, and the rotating disc is filled with bacteria culture fillers; a screw rod is arranged at the bottom of the inner side of the aerobic tank, the screw rod is parallel to the shaft, the same side ends of the shaft and the screw rod pass out of the aerobic tank, and the passing-out end of the shaft is in transmission connection with the passing-out end of the screw rod; a sludge discharge pipe is arranged at the bottom of the side wall of the aerobic tank, a vertical scraper is arranged at the bottom of the inner side of the aerobic tank, screw holes are arranged on the scraper, and the screw rod is matched with the screw holes. The bacteria film and the attachments on the surface of the fillers can be stripped through mutual collision and friction between the fillers, so that water flow exchange in and out of the fillers is smoother.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The present invention discloses a method for cultivating activated sludge for efficiently treating coking wastewater. The present invention adopts bio-fortified strains and rice husk biochar to prepare a microbial immobilization carrier, and the carrier is added to a simulated coking wastewater activated sludge treatment system to form bio-fortified activated sludge, which is successively added to simulated coking wastewater with gradually increasing phenol concentration, simulated coking wastewater with gradually increasing nitrogen-containing heterocyclic compound concentration, and simulated coking wastewater with gradually increasing polycyclic aromatic hydrocarbon concentration for three times of acclimation to obtain activated sludge after the third acclimation, and the activated sludge is applied to treat simulated coking wastewater. The activated sludge after the third acclimation of the present invention can simultaneously and efficiently degrade multiple target pollutants in the simulated coking wastewater.

The invention discloses a coking wastewater treatment system. The coking wastewater treatment system comprises a biochemical pretreatment system, a biochemical treatment system, a deep pretreatment system, a deep treatment system, a concentrated water treatment system, a matched dosing system and a sludge treatment system which are connected in sequence, the coking wastewater is used for blast furnace smelting slag flushing after being treated by the coking wastewater treatment system. According to the coking wastewater treatment system, a two-stage A / O process is adopted, meanwhile, an ozone advanced oxidation process is used for oxidizing part of pollutants and decolorizing a water body, the removal effect on COD, ammonia nitrogen, cyanide and other pollutants and chromaticity is enhanced, after ozone is decomposed, a decomposition product is oxygen, secondary pollution is not caused, and no sludge is generated. The coking wastewater treated by the treatment system disclosed by the invention meets the water standard for blast furnace slag flushing.

The invention relates to a high-efficiency phenol degrading bacterium with an aerobic denitrification characteristic and application thereof, and belongs to the technical field of coking wastewater treatment and microorganisms. The strain is preserved in the China Center for Type Culture Collection, the preservation number is CCTCC NO: M20242868, and the preservation time is December 20, 2024. The strain can grow and breed by taking phenol as a unique carbon source, complete degradation of 1250mg / L phenol is realized, and phenol with the concentration range of 1000mg / L can be rapidly degraded within 36 hours. The strain PD-1 can also realize efficient and synchronous removal of phenol and a nitrogen source under the condition that NH4 < + >-N, NO2 <->-N or NO3 <->-N is used as the only nitrogen source. The strain PD-1 provided by the invention can quickly degrade high-concentration phenol in a water body, has the advantages of high efficiency, low energy consumption and no secondary pollution, and has important theoretical and application values.

The invention relates to the field of environmental engineering and technology, and discloses a coprocessing method for coking wastewater based on MBR (membrane bioreactor) technology, which sequentially comprises the steps of pretreatment, biological enhancement treatment, nitrogen and phosphorus removal treatment, sludge regulation and control treatment, membrane pollution control treatment and circular treatment, and comprises the following steps: introducing coking wastewater into a grating and a grit chamber; performing pretreatment to remove large-particle impurities; in the biological enhancement and nitrogen and phosphorus removal stage, a microbial agent is added to regulate and control the reaction environment so as to improve the pollutant degradation efficiency; accurate management and control of sludge performance and membrane pollution are realized by using an online monitoring technology; finally, sludge, cleaning wastewater and the like generated in all links are collected in a classified mode, the sludge is subjected to resource utilization after stabilization treatment, the cleaning wastewater is reused in the pretreatment stage, and a closed-loop treatment system is formed; through the steps, the problems of incomplete removal of COD (Chemical Oxygen Demand) and ammonia nitrogen, low removal rate of total nitrogen and total phosphorus, sludge bulking, fast membrane pollution and high risk of secondary pollution in the traditional process are effectively solved.

The utility model relates to the technical field of water treatment, in particular to a coking wastewater treatment system which comprises an electrocatalytic oxidation unit, and a nanofiltration unit, a reverse osmosis unit, a fluorine and silicon removal unit and an evaporative crystallization unit which are connected in sequence, the electrocatalytic oxidation unit is connected with the nanofiltration unit and the evaporative crystallization unit so as to respectively receive nanofiltration concentrated water and evaporative crystallization mother liquor, and the electrocatalytic oxidation unit is used for carrying out electrocatalytic oxidation treatment on the nanofiltration concentrated water and the evaporative crystallization mother liquor; and an anode of the electrocatalytic oxidation unit adopts a boron-doped diamond electrode. By adopting the boron-doped diamond electrode as the anode of the electrocatalytic oxidation unit, electrocatalytic oxidation treatment can be directly carried out on the nanofiltration concentrated water and the evaporative crystallization mother liquor, enrichment of the nanofiltration concentrated liquor and the evaporative crystallization mother liquor is avoided, the purity of industrial salt is improved, meanwhile, the treatment cost of the mother liquor as hazardous waste is avoided, and the salt recovery cost is reduced.

The utility model belongs to the technical field of industrial wastewater treatment, and particularly relates to a coking wastewater treatment system for industrial continuous production. Comprising a decomposition bin which comprises a moisture evaporation bin, an ammonia decomposition bin, a horizontal transmission belt penetrating through the moisture evaporation bin and the ammonia decomposition bin, a sedimentation tank, a filter connected to an outlet of the sedimentation tank, and a buffer bin connected to an outlet of the filter. The coking wastewater generates struvite in the sedimentation tank, redundant water is filtered out in the filter, and the struvite is stored in the surge bin and then sent to the decomposition bin. The ammonia gas enters the water evaporation bin through the horizontal conveying belt to evaporate redundant water, and then is fed into the ammonia gas decomposition bin to be thermally decomposed to release ammonia gas. The buffer bin can enable intermittent work of the filter not to affect continuous production of the system, the decomposition bin can achieve continuous evaporation dehydration and thermal decomposition processes, the wastewater treatment efficiency is improved, meanwhile, struvite decomposition products are reused in wastewater treatment, cyclic utilization of resources is achieved, and the energy consumption is reduced. The method has good economic benefits and environmental benefits.

The invention relates to the field of coal chemical industry, the field of environmental engineering and the technical field of sewage treatment, in particular to a biochemical treatment process for coal chemical industry wastewater, which comprises a cascade physicochemical treatment unit, a phenol ammonia recovery unit, a biochemical enhanced treatment unit and a deep treatment unit which are connected in sequence, the cascade physicochemical treatment unit is used for three-stage gradient oil removal; the phenol-ammonia recovery unit is used for removing phenol and ammonia and recovering resources; the biochemical enhanced treatment unit is used for efficiently degrading organic matters and removing nitrogen; the deep treatment unit is used for removing refractory pollutants and hardness and fluorine ions; through system integration and synergistic effects of four process units of cascade physicochemical treatment, phenol ammonia recovery, biochemical enhanced treatment and deep treatment, the whole-process efficient purification capacity for the coal chemical wastewater (such as semi-coke wastewater) is formed.

The invention discloses a method for electrochemically treating semi-coke wastewater based on a BDD electrode and application of the method, and the method comprises the following steps: S1, introducing the semi-coke wastewater into an oil removal section for oil removal to obtain semi-coke wastewater after crude separation; s2, introducing the semi-coke wastewater subjected to crude separation into an ammonia distillation dephenolization section, and sequentially carrying out deamination treatment and dephenolization treatment to obtain pretreated semi-coke wastewater; s3, the pretreated semi-coke wastewater is introduced into a BDD electrode anode chamber of an electrochemical oxidation section for electrolytic treatment, and electro-catalyzed semi-coke wastewater, acid liquor and alkali liquor are obtained; s4, alkalifying the semi-coke wastewater subjected to electro-catalysis by using alkali liquor, introducing the alkalified semi-coke wastewater into a biochemical section, and carrying out biochemical treatment to obtain wastewater meeting the discharge standard; the acid liquor and the alkali liquor in the step S3 are collected and used for acidification and alkalization treatment in the step S2 and the step S4. According to the method provided by the invention, the organic load of a biochemical system is reduced through electrochemical oxidation, and the BOD (Biochemical Oxygen Demand) in the wastewater is improved.

The invention provides a sulfur-mediated anaerobic-anoxic-aerobic coking wastewater treatment method and system.The method comprises the steps that after specific strains are inoculated into an anaerobic reactor, an anoxic reactor and an aerobic reactor which are sequentially communicated, coking wastewater to be treated sequentially passes through the anaerobic reactor, the anoxic reactor and the aerobic reactor; and settling through a settling pond to realize wastewater treatment. In the process, the coking wastewater to be treated sequentially passes through the anaerobic reactor inoculated with the sulfate reducing bacteria, the anoxic reactor inoculated with the sulfur autotrophic denitrifying bacteria and the aerobic reactor inoculated with the nitrifying bacteria, and sulfur circulation is embedded in the coking wastewater treatment process, so that various pollutants in the coking wastewater are effectively removed.

The utility model belongs to the technical field of coal coking waste, particularly relates to a collecting and treating device for VOCs (volatile organic compounds) gas in a coal coking waste water pool, and provides the following scheme aiming at the problems that the treated gas does not reach the standard and must be discharged to the atmosphere to cause environmental pollution due to the fact that the existing equipment is not provided with a waste secondary reflux structure. A filtering structure is arranged in the treatment box, a liquid supply structure is arranged at the bottom end of the interior of the treatment box, the filtering structure comprises six bearing plates symmetrically welded to the two sides of the interior of the treatment box, and first filtering plates are mounted at the tops of the two bearing plates at the top in the six bearing plates through bolts. According to the utility model, the detector is arranged in the exhaust port, so that the gas concentration detection behavior is realized in real time, and once the gas concentration is detected to be substandard, the gas is conveyed to the gas collection port through the return pipe, so that the secondary treatment behavior is realized, the quality of the exhausted gas is effectively improved, and the problem of environmental pollution is avoided.

The utility model relates to the technical field of wastewater treatment, in particular to a high-efficiency defoaming device for coal coking wastewater treatment, and aims to solve the technical problem of poor defoaming effect caused by difficulty in uniformly covering a sedimentation tank with a larger area during feeding. The threaded shaft is in threaded connection with a scraping plate, the scraping plate is slidably connected to the sliding rail, the upper portions of the two sliding ends of the scraping plate are each provided with a corresponding defoaming mechanism, the defoaming mechanisms are connected to the side wall of the sedimentation tank, the defoaming mechanisms can add a defoaming agent to the lower portion, and foam is scraped to the two sides of the sedimentation tank through the scraping plate moving back and forth in the sedimentation tank; the defoaming mechanisms located on the upper portions of the two sides of the sedimentation tank add defoaming agents downwards to eliminate foams, so that all the foams can be covered without even adding, compared with full-tank adding, the agent consumption can be reduced, and the scraper advances on the liquid level of the upper portion of the sedimentation tank, and precipitation on the lower portion cannot be affected.

This invention provides a semi-coke wastewater treatment device and process. The semi-coke wastewater treatment device comprises, in sequence, a semi-coke production wastewater conditioning system, an electrolytic flotation system, a freeze crystallization system, a salt phase conditioning system, a high-temperature wet oxidation system, and an ammonia nitrogen stripping and distillation system. The freeze crystallization system is connected to an aqueous phase conditioning system, a BDD electro-oxidation system, and a biochemical system. The ammonia nitrogen stripping and distillation system is connected to the biochemical system. This invention effectively solves a series of technical problems in existing semi-coke wastewater treatment devices, such as lengthy process flows, high equipment investment and operating energy consumption, and clogging of the ammonia stripping and phenol removal unit due to phenol polymerization and coking, and oil adhesion. This invention also provides a semi-coke wastewater treatment process.

The utility model relates to a catalytic ozonation tower for advanced treatment of coking wastewater, which comprises an upper tower section and a lower tower section, the top of the lower tower section is detachably communicated with the bottom of the upper tower section, a plurality of partition plates are vertically distributed in the lower tower section at intervals, one end of each partition plate is fixedly connected with the inner side wall of the lower tower section, and a gap is reserved between the other end of each partition plate and the inner side wall of the lower tower section. The fixed ends of every two adjacent partition plates are opposite, an ozone channel is arranged in the fixed end of each partition plate, air inlet pipes are arranged on the left outer side and the right outer side of the lower tower section, the two air inlet pipes are communicated through a conveying pipeline, one end of each ozone channel is communicated with the adjacent air inlet pipe through an air inlet branch pipe, and the other end of each ozone channel is communicated with an aeration head fixedly arranged at the bottom of the corresponding partition plate. Two mesh plates are distributed between the aeration head and the free end of the corresponding partition plate, a catalyst is filled between the two mesh plates, and the bottom of the lower tower section corresponding to the fixed end of the lowermost partition plate is communicated with a water inlet pipe. According to the utility model, multiple aeration mixing and catalytic oxidation of wastewater can be realized, and the overall treatment quality is higher.

The present application relates to a kind of coking wastewater advanced treatment method and system, method includes: the water quality characteristics of coking wastewater are pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler;Coking wastewater is sent into biochemical pool and carries out biochemical reaction, and modified polyurethane suspended filler is placed in biochemical pool;The effluent of biochemical pool is sent into electro-catalytic oxidation device and carries out electrolysis reaction, and electro-catalytic oxidation device uses modified anode electrode as anode electrode, and uses graphite electrode as cathode electrode;The effluent of electro-catalytic oxidation device is sent into filler adsorption tower and carries out adsorption treatment, and modified fly ash filler is placed in filler adsorption tower.The present application is pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler for coking wastewater advanced treatment for the water quality characteristics of coking wastewater, can economically and efficiently reduce the content of TOC, total fluorinated alkyl compound and total cyanide in coking wastewater.

The present application relates to a kind of new process combination for coke wastewater evaporation treatment, and the present application discloses a kind of new process combination for coke wastewater evaporation treatment.The process is first to coke wastewater for deacidification, ammonia evaporation pretreatment, after adding liquid alkali and inhibitor, in turn into one effect, two effect falling film evaporation system and three effect double-heater forced circulation evaporation system, each effect separator is equipped with demister to strengthen gas-liquid separation, to prevent mist entrainment.Three effect concentrated liquid is separated by centrifugal desalting, mother liquor is recovered with carbon dioxide decomposition process, and the clear liquid is recycled;Each effect condensate is uniformly collected and can be directly introduced into biochemical treatment, and the water quality is stable and up to standard.The present application solves the problems of easy scaling, corrosion, high energy consumption and unstable effluent in traditional process by using heat energy cascade utilization, anti-fouling structure and corrosion-resistant material, and has the advantages of stable operation, energy saving, high resource utilization rate and long-term continuous operation, and is suitable for efficient treatment and resource recovery of high-salt and high-phenol coke wastewater.

A phenol extraction system for semi-coke wastewater treatment is characterized in that a solvent conveying header pipe is divided into two paths, one path is connected with a solvent inlet in the lower part of a first extraction tower, and the other path is connected with a solvent inlet in the lower part of a second extraction tower; the upper part of the first extraction tower is connected with a wastewater input pipe and an extract overflow pipe, an extract input port at the lower part of the first extraction tower is connected with an extract output port of an extract tank through an extract conveying pump set, and an extract input port of the extract tank is connected with an extract output port at the upper part of the second extraction tower; a wastewater output port at the bottom of the first extraction tower is connected with an input port of a wastewater conveying pump set I, an output port of the wastewater conveying pump set I is connected with a wastewater inlet at the upper part of the second extraction tower, and a wastewater output port at the bottom of the second extraction tower is connected with an input port of a wastewater conveying pump set II; and an output port of the wastewater conveying pump set II is connected with the extracted wastewater conveying pipe. The device disclosed by the utility model has the advantages of high removal efficiency of phenolic substances and stability in operation.

The invention discloses a coking wastewater treatment method based on gas ratio combined precipitation, which comprises the following steps: adding an acidic reagent and PAM (polyacrylamide) into coking wastewater, and removing small molecular weight toxic substances, specifically thiocyanide and cyanide, and large molecular weight toxic substances, specifically more than ternary phenol and tar in the wastewater through a gas ratio combined precipitation device, the method comprises the following steps: treating the coking wastewater through a GDiAR-F anaerobic reactor, removing three-element or less phenol and macromolecular COD (Chemical Oxygen Demand) through a GDiAR-F anaerobic reactor, removing micromolecular COD, ammonia nitrogen, TN (Total Nitrogen) and TP (Total Phosphorus) in the wastewater through a secondary A / O (Anaerobic / Oxic) device, and finally enabling the effluent to reach the standard, thereby completing the comprehensive and efficient treatment The coking wastewater is treated by adopting a gas ratio combination precipitation device, a GDiAR-F anaerobic reactor and a secondary A / O device, so that the effluent of the coking wastewater is stably discharged in a standard reaching manner. The method does not need to add activated carbon, is simple to operate and low in cost, can greatly reduce the operating cost of each ton of wastewater, and achieves the direct emission standard of Emission Standard of Pollutants in Coking Industry, thereby having wide development potential.

The utility model discloses a coking wastewater treatment device based on photocatalytic reaction. The coking wastewater treatment device based on photocatalytic reaction comprises a water bearing plate and a water distribution pipe. The water bearing plate is provided with a water bearing groove, and the groove bottom of the water bearing groove is inclined. The water distribution pipe is provided with a plurality of water outlets arranged at intervals in the axis direction of the water distribution pipe, the water distribution pipe is located in the water bearing tank and close to the high position of the tank bottom of the water bearing tank, and the water outlets face the low position of the tank bottom. The plurality of water outlets arranged at intervals are distributed along the axis of the water distribution pipe, and all parts on the tank bottom of the water bearing tank are on the same plane, so that the coking wastewater in the plurality of water outlets can be sequentially output towards the lower part of the tank bottom along the axis of the water distribution pipe, and flows to the lower part of the tank bottom under the action of gravity; therefore, the wastewater in the water distribution pipe can be uniformly distributed at the bottom of the water bearing tank, the photocatalytic reaction area of the coking wastewater is increased, the contact time of the coking wastewater and light is prolonged, the photocatalytic reaction is promoted, and the efficiency of degrading the coking wastewater by the photocatalytic reaction is improved.

The present invention relates to an oil removal system for treating semi-coke wastewater, which comprises a pretreatment unit, a primary separation unit and a secondary separation unit connected in sequence. The pretreatment unit is used for preliminary oil-water separation. The primary separation unit includes an oil drainage area, a separation area and a heavy oil area from top to bottom. A water distribution pipe and an air pipe are arranged in the separation area to input semi-coke wastewater and air bubbles into the separation area respectively. At least one movable separation rotor is arranged in the separation area to stir the semi-coke wastewater and promote oil-water separation. The oil drainage area is provided with a first oil drainage port for discharging the separated light oil, and the heavy oil area is provided with a heavy oil drainage port for discharging the separated heavy oil and oil residue. The secondary separation unit includes an oil phase area and a mixing area from top to bottom. A water inlet pipe and at least one movable demulsification rotor are arranged in the mixing area to demulsify the wastewater treated by the primary separation unit and further separate oil and water.

The utility model discloses a coking wastewater purification treatment device which comprises a base and a group of cylindrical filters arranged on two sides of the base, and a continuous filtering mechanism and a cleaning mechanism are respectively arranged in the group of cylindrical filters. The cleaning mechanism comprises a mounting plate, an adjusting motor, an adjusting disc, a group of guide sleeves, a group of sliding rods, a cleaning motor, a rotating shaft, a sliding shaft sleeve, a group of driving gears, a group of cleaning shafts and a group of cleaning brushes, and the continuous filtering mechanism comprises a flow guide pipe I, a group of filtering inner cylinders, a flow guide pipe II, a group of rotating shafts and two groups of circular switching valves. The continuous filtering device has the beneficial effects that the continuous filtering mechanism is arranged in one group of cylindrical filters, and two groups of circular switching valves are adopted to alternately switch one group of cylindrical filters for use, so that continuous filtering treatment of coking wastewater can be realized, the filtering inner cylinder needing to be cleaned can be automatically cleaned by matching with the cleaning mechanism, and the continuous filtering device is convenient to use and high in practicability. And the purification treatment efficiency of the coking wastewater is improved.

The present application belongs to the technical field of wastewater treatment, and relates to a method for pretreating coking wastewater by zero-valent iron process combined with ultrasonic-flocculation method, comprising the following steps: 1) the wastewater is subjected to heating and ultrasonic degradation treatment; 2) air is introduced into the wastewater after ultrasonic degradation, and a composite flocculant, iron filings and coal-based acicular coke powder are sequentially added, and ultrasonic stirring and standing and sedimentation are performed to complete the pretreatment. The present application provides a method for pretreating coking wastewater by zero-valent iron process combined with ultrasonic-flocculation method, which effectively removes pollutants in the coking wastewater, improves the subsequent biodegradability of the wastewater, has low implementation cost, and has large-scale popularization and application value.