CN102616987A - System and method for treatment and recycling of coking phenol-cyanogen wastewater - Google Patents
System and method for treatment and recycling of coking phenol-cyanogen wastewater Download PDFInfo
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Abstract
A system and a method for treatment and recycling of coking phenol-cyanogen wastewater are used for solving the problem of difficulty in recycling of existing coking phenol-cyanogen wastewater. The system is characterized by comprising a coking phenol-cyanogen wastewater biochemical pretreating subsystem and a three-membrane method deep treating subsystem connected with same. The coking phenol-cyanogen wastewater biochemical pretreating subsystem comprises an anaerobic biological membrane reactor, an anoxic biological membrane reactor and aerobic biological membrane reactor in sequential connection, wherein the aerobic biological membrane reactor is connected with a horizontal flow sedimentation tank which is further connected with a coagulation reaction tank, and the coagulation reaction tank is connected with an oblique-plate sedimentation tank which is in connection with a first middle water tank. The three-membrane method deep treating subsystem comprises a ceramic membrane filter, an ultrafiltration membrane filter and a nanofiltration membrane filter, wherein the ceramic membrane filter is connected with the first middle water tank and further connected with the ultrafiltration membrane filter through a second middle water tank, and the ultrafiltration membrane filter is connected with the nanofiltration membrane filter through a third middle water tank.
Description
Technical field
The present invention relates to coking wastewater containing phenol and cyanide process field, particularly a kind of coking wastewater containing phenol and cyanide is handled reclaiming system and method, is used to solve the problem that existing coking wastewater containing phenol and cyanide is difficult to reuse.
Background technology
The coking wastewater containing phenol and cyanide is the waste water that produces in the processing and refining process of coal system Jiao, gas purification and coking by-products; Be the waste water that contains high-concentration phenol and cyanogen; Its pollutent is formed complicacy, concentration is high, toxicity is big, is a kind of trade effluent that typically contains Persistent organic pollutants.This waste water is mainly derived from remained ammonia, crude benzol divides dried up, whole cold water more than needed, tar separation water four parts.Wastewater flow rate is big, water-quality constituents is complicated, except that things such as the phenol that contains high density, cyanogen, oil, ammonia nitrogen, also contains many rings such as quinoline, benzene class and verivate thereof or heterocyclic compound.The colourity that pollutent forms is high, in water, exists with true solution or accurate alternative form, and character is highly stable, COD and color removal difficulty.The coking wastewater containing phenol and cyanide is handled reuse and is generally taked biochemical process pre-treatment and reverse osmosis advanced processing reuse two stages of treatment mode at present.Biochemical treatment comprises: oil removal, and flotation, anaerobism, anoxic, aerobic, coagulating sedimentation etc.The coking wastewater containing phenol and cyanide is after above-mentioned biochemical treatment, and the content of phenol can reach the GBI3456-92 standard in the efflux wastewater, but prussiate, COD and ammonia nitrogen are very difficult up to standard.In addition, because the singularity of coking wastewater containing phenol and cyanide composition uses traditional r-o-to reclaim technology, the recovery is low, and the work-ing life of film is low, generally is no more than 1 year, has increased the running cost expense greatly.Therefore combine practical application, developing a kind of effective and coking wastewater containing phenol and cyanide that be easy to running maintenance, to handle reuse technology be an important topic in the Iron And Steel Industry environmental improvement work.
Summary of the invention
The present invention is directed to the defective or the deficiency that exist in the prior art, provide a kind of coking wastewater containing phenol and cyanide to handle reclaiming system and method, be used to solve the problem that existing coking wastewater containing phenol and cyanide is difficult to reuse.
Technical scheme of the present invention is following:
A kind of coking wastewater containing phenol and cyanide is handled reclaiming system, it is characterized in that, comprises the biochemical preprocessing subsystem of coking wastewater containing phenol and cyanide and is connected three embrane method advanced treatment subsystems with it; The biochemical preprocessing subsystem of said coking wastewater containing phenol and cyanide comprises anaerobe membrane reactor, anoxic biofilm reactor and the aerobe reactor that connects successively; Said aerobe reactor connects horizontal sedimentation tank; Said horizontal sedimentation tank connects coagulation reaction tank; Said coagulation reaction tank connects inclined-plate clarifying basin, and said inclined-plate clarifying basin connects first intermediate pool; Said three embrane method advanced treatment subsystems comprise ceramic membrane filter device, ultrafiltration membrance filter device and nf membrane strainer; Said ceramic membrane filter device connects said first intermediate pool; And connecting said ultrafiltration membrance filter device through second intermediate pool, said ultrafiltration membrance filter device connects said nf membrane strainer through the 3rd intermediate pool.
Said nf membrane strainer connects the product pond, and said product pond connects reuse water and sends pipeline outside.
Said anaerobe membrane reactor connects the jet air float machine, and the water outlet of said jet air float machine gets into said anaerobe membrane reactor by gravity, and the dregs of fat outlet of said jet air float machine connects dregs of fat pond, and the light oil outlet of said jet air float machine connects the light oil pond.
Said jet air float machine connects the equalizing tank water outlet, is provided with the underwater jet aeration device in the said equalizing tank.
Said equalizing tank connects the grease removal tank water outlet, is provided with tubular type oil skimming machine in the said grease removal tank, and the water outlet of said grease removal tank gets into said equalizing tank through pipeline self.
Side between the import of said equalizing tank and the outlet of said grease removal tank is provided with accident pool.
The coking wastewater containing phenol and cyanide water-in pipeline of said grease removal tank is provided with sewage input aperture and other phenol water input.
Said horizontal sedimentation tank all is connected sludge thickener through the mud passage with said inclined-plate clarifying basin, and said sludge thickener connects sludge treatment device; Mud at the bottom of the said horizontal sedimentation tank pond is sent aerobe reactor back to through suction dredger; The water outlet of said horizontal sedimentation tank is connected with and makes the recirculation water passage of part effluent recycling to anoxic winding shaft, and said anoxic winding shaft is between said anoxic biofilm reactor and said anaerobe membrane reactor; Said coagulation reaction tank connects chemicals dosing plant.
Said aerobe reactor adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor, be provided with in the said anoxic biofilm reactor and be used to hang biomembranous carbon fibers filler; Be provided with in the said anaerobe membrane reactor and be used to hang biomembranous carbon fibers filler.
A kind of coking wastewater containing phenol and cyanide is handled reuse method, it is characterized in that, may further comprise the steps: after pending coking wastewater containing phenol and cyanide is carried out biochemical pre-treatment, also will carry out three embrane method advanced treatment; Said biochemical pre-treatment comprises that nitrated that the acidified degradation of oil removal treatment, the adjusting processing of carrying out successively, the air-dissolving air-float processing that utilizes the jet air float machine, anaerobe film reaction is handled, the biological denitrification process of anoxic biomembrane reaction is handled, aerobe reacts taken the photograph phosphorus processing, advection sedimentation processing, coagulating is handled and sloping plate deposition is handled; Said three embrane method advanced treatment comprise utilizes the filtration treatment ceramic membrane filter device, that ultrafiltration membrance filter device and nf membrane strainer carry out successively; Said aerobe reactor adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor; Be equipped with in the said anoxic biofilm reactor and in the said anaerobe membrane reactor and be used to hang biomembranous carbon fibers filler; The coagulating agent that adopts during said coagulating is handled is a Poly aluminum Chloride (PAC).
Technique effect of the present invention is following: the present invention is with respect to existing coking wastewater containing phenol and cyanide treatment technology, and better to the treatment effect of phenol cyanogen pollutant in the waste water, the concentration of phenol generally is lower than 0.5mg/L in the waste water after the processing, can reach national grade one discharge standard; Ammonia nitrogen concentration in the processed waste water reduce significantly (≤25mg/L); " three embrane methods " after the biochemical treatment can further be removed COD (COD) and the SS (suspended substance) in the waste water.
Description of drawings
Fig. 1 is first structural representation that a kind of coking wastewater containing phenol and cyanide of embodiment of the present invention is handled reclaiming system.
Fig. 2 is second structural representation that a kind of coking wastewater containing phenol and cyanide of embodiment of the present invention is handled reclaiming system.
Reference numeral is listed as follows: 100-coking wastewater containing phenol and cyanide biochemical treatment subsystem; 101-coking wastewater containing phenol and cyanide inlet; 102-sewage inlet; Other phenol water inlet of 103-coking; The 104-grease removal tank; The 105-accident pool; The 106-equalizing tank; 107-jet air float machine; 108-dregs of fat pond; 109-light oil pond; 110-anaerobe membrane reactor; 111-anoxic biofilm reactor; The 112-aerobe reactor; The 113-horizontal sedimentation tank; 114-mud return flow line; 115-sewage backflow passage; The 116-coagulation reaction tank; The 117-chemicals dosing plant; The 118-inclined-plate clarifying basin; 119-first intermediate pool; 200-three embrane method advanced treatment subsystems; 220-ceramic membrane filter device; 221-second intermediate pool; 222-ultrafiltration membrance filter device; 223-the 3rd intermediate pool; 224-nf membrane strainer; 225-product pond; 226-product pond outlet; 300-sludge treatment subsystem; 301-mud passage; The 302-sludge thickener; The 303-sludge treatment device.
Embodiment
(Fig. 1-Fig. 2) the present invention will be described below in conjunction with accompanying drawing.
Fig. 1 is first structural representation that a kind of coking wastewater containing phenol and cyanide of embodiment of the present invention is handled reclaiming system.Fig. 2 is second structural representation that a kind of coking wastewater containing phenol and cyanide of embodiment of the present invention is handled reclaiming system.As depicted in figs. 1 and 2, a kind of coking wastewater containing phenol and cyanide is handled reclaiming system, it is characterized in that, comprises the biochemical preprocessing subsystem 100 of coking wastewater containing phenol and cyanide and is connected three embrane method advanced treatment subsystems 200 with it; The biochemical preprocessing subsystem 100 of said coking wastewater containing phenol and cyanide comprises anaerobe membrane reactor 110, anoxic biofilm reactor 111 and the aerobe reactor 112 that connects successively; Said aerobe reactor 112 connects horizontal sedimentation tank 113; Said horizontal sedimentation tank 113 connects coagulation reaction tank 116; Said coagulation reaction tank 116 connects inclined-plate clarifying basin 118, and said inclined-plate clarifying basin 118 connects first intermediate pool 119; Said three embrane method advanced treatment subsystems 200 comprise ceramic membrane filter device 220, ultrafiltration membrance filter device 222 and nf membrane strainer 225; Said ceramic membrane filter device 220 connects said first intermediate pool 119; And through the said ultrafiltration membrance filter device 222 of second intermediate pool, 221 connections, said ultrafiltration membrance filter device 222 connects said nf membrane strainer 224 through the 3rd intermediate pool 223.Said nf membrane strainer 224 connects product pond 225, and said product pond 225 connects reuse water through product pond outlet 226 and sends pipeline outside.Said anaerobe membrane reactor 110 connects jet air float machine 107; The water outlet of said jet air float machine 107 gets into said anaerobe membrane reactor 110 by gravity; The dregs of fat outlet of said jet air float machine 107 connects dregs of fat pond 108, and the light oil outlet of said jet air float machine 107 connects light oil pond 109.Said jet air float machine 107 connects equalizing tank 106 water outlets, is provided with the underwater jet aeration device in the said equalizing tank 106.Said equalizing tank 106 connects grease removal tank 104 water outlets, is provided with tubular type oil skimming machine in the said grease removal tank 104, and the water outlet of said grease removal tank 104 gets into said equalizing tank 106 through pipeline self.Side between the outlet of the import of said equalizing tank 106 and said grease removal tank 104 is provided with accident pool 105.The coking wastewater containing phenol and cyanide water-in pipeline of said grease removal tank 104 is provided with sewage input aperture 102 and other phenol water input 103.Said horizontal sedimentation tank 113 all is connected sludge thickener 302 through mud passage 301 with said inclined-plate clarifying basin 118 and promptly gets into sludge treatment subsystem 300, and said sludge thickener 302 connects sludge treatment device 303; Mud at the bottom of said horizontal sedimentation tank 113 ponds is sent aerobe reactor 112 through suction dredger back to through mud return flow line 114; The water outlet of said horizontal sedimentation tank 113 is connected with and makes the recirculation water passage 115 of part effluent recycling to anoxic winding shaft, and said anoxic winding shaft is between said anoxic biofilm reactor 111 and said anaerobe membrane reactor 110; Said coagulation reaction tank 116 connects chemicals dosing plant 117.Said aerobe reactor 112 adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor 111, be provided with in the said anoxic biofilm reactor 111 and be used to hang biomembranous carbon fibers filler; Be provided with in the said anaerobe membrane reactor 110 and be used to hang biomembranous carbon fibers filler.
A kind of coking wastewater containing phenol and cyanide is handled reuse method, it is characterized in that, may further comprise the steps: after pending coking wastewater containing phenol and cyanide is carried out biochemical pre-treatment, also will carry out three embrane method advanced treatment; Said biochemical pre-treatment comprises that nitrated that the acidified degradation of oil removal treatment, the adjusting processing of carrying out successively, the air-dissolving air-float processing that utilizes the jet air float machine, anaerobe film reaction is handled, the biological denitrification process of anoxic biomembrane reaction is handled, aerobe reacts taken the photograph phosphorus processing, advection sedimentation processing, coagulating is handled and sloping plate deposition is handled; Said three embrane method advanced treatment comprise utilizes the filtration treatment ceramic membrane filter device, that ultrafiltration membrance filter device and nf membrane strainer carry out successively; Said aerobe reactor adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor; Be equipped with in the said anoxic biofilm reactor and in the said anaerobe membrane reactor and be used to hang biomembranous carbon fibers filler; The coagulating agent that adopts during said coagulating is handled is a Poly aluminum Chloride (PAC).
The present invention proposes a kind of brand-new processing reuse technology, on the basis of existing biochemical treatment coking wastewater containing phenol and cyanide,, can solve difficult problems such as anaerobism and denitrification structures water distribution be inhomogeneous preferably configuration turning spurt water device at the bottom of the anoxic biofilm reactor pond.The present invention also replaces with the carbon fibers filler with the common combined stuffing in anaerobic reactor and the anoxic reacter; Can obviously promote the water body purification effect; And independent development " three embrane methods " advanced treatment equipment carry out subsequent disposal and reuse, significantly promoted COD and ammonia-N removal rate.The present invention has characteristics such as technology is reasonable, the wastewater treatment purification rate is high, waste water comprehensive utilization effect is obvious.Comprise grease removal tank, accident pond, equalizing tank, anaerobe membrane reactor, anoxic biofilm reactor, aerobe reactor, coagulative precipitation tank and connected inclined-plate clarifying basin etc. in the system; Main purpose is the oily substance in the separation of produced waste water; And the water quantity and quality that comes water regulated; And, reduce COD, NH in the waste water through the biochemical action of mikrobe (active sludge) the hazardous and noxious substances in the coking wastewater containing phenol and cyanide of degrading
3Pollutant loads such as-N." three embrane methods " advanced treatment subsystem adopts the process system in ceramic membrane filter device → ultrafiltration membrance filter device → nf membrane strainer → product pond; Be called for short by " three embrane method filtration units "; Waste water in order to biochemical treatment carries out more deep processing, and the COD, ammonia nitrogen, TDS (total dissolved solidss) etc. of waste water are further reduced.
The biochemical preprocessing subsystem each several part explanation of coking wastewater containing phenol and cyanide: (1) grease removal tank: distilled ammonia wastewater and other wastewater containing phenol and cyanide by coking production is sent here, directly get into grease removal tank, carry out gravity oil-removing and remove a spot of COD simultaneously; Establish tubular type oil skimming machine on the water surface; The residual oil slick in the waste water is removed in its effect, and the oil slick of collection flows automatically in the oil slick pond, regularly sends outside; Grease removal tank bottom settlings thing is regularly sent outside through pipeline; The grease removal tank water outlet gets into equalizing tank through pipeline self, and the gravity oil-removing pond divides two to be, paired running.(2) equalizing tank: because the variation discharged waste water of production cycle can fluctuate thereupon, the waste water quality fluctuation of discharging also can be very big, therefore need establish equalizing tank at the Sewage treatment systems front end.The equalizing tank effect both can have been taken out residual heavy oil and the oil slick in the waste water, can regulate the waste water water yield, water temperature, water quality again, thus the steady running of assurance subsequent disposal facility.Water is delivered to the jet air float machine through lift pump in the pond, the settling of pond bottom, and regularly (about 2 years) labor cleaning carries out.The accident equalizing tank divides two to be, paired running also can two be alternately (12 hours at interval) operation.For the ease of the management of workman's operation, the instrument specialty is provided with the high and low pressure liquid level alarm device in the pond.Be provided with the underwater jet aeration device in the equalizing tank, stir homogenizing coming water water quality.Aeration rate can be adjusted according to water quality situation and disposition scene, improves subsequent disposal efficient.Two chemical pumps are set, the using and the reserved.The waste water that discharges when accident pool is used to hold process abnormality processes afterwards again.(3) jet air float machine: the jet air float water treatment system is one and relates to machinery, electric power and relevant chemically treated composite technology process that the jet air float machine comprises tank body, air dissolved pump and flowline and the pipeline of slagging tap.Its principle of work is that the vacuum principle with ejector adds air in the outlet conduit of water pump; Make a large amount of dispersion microbubble of generation in the water, make carrier with micro-bubble, impurity particle sticks on the carrier; Thereby form the buoyancy aid of density less than water; Buoyancy aid accumulates on the liquid level at the buoyancy float downward, and then flows into dregs of fat pond and light oil pond through pipeline.(4) anaerobe membrane reactor: the water outlet of jet air float machine leans on gravity to get into the anaerobe membrane reactor; The anaerobe membrane reactor plays a part larger molecular organics is carried out acidifying and part degraded; Make compound open loops such as former ring-type organism that is difficult to be decomposed such as heterocycle, cycloaliphatic ring, Ppolynuclear aromatic by aerobic microbiological; Generate the lipid acid or the low molecular organic acids of long-chain, thereby be the organism that anoxic biofilm reactor and aerobe reactor provide readily biodegradable; Be provided with the carbon fibers filler in the anaerobe membrane reactor, be used to hang microbial film, biomembranous row becomes, and has greatly improved the contact area of organism and sewage, plays an important role to improving effluent quality.The water outlet of anaerobe membrane reactor mixes after the anoxic biofilm reactor is delivered in the pump pressurization with reflux sedimentation tank water outlet entering backflow pond.(5) anoxic biofilm reactor: the anoxic biofilm reactor is one of core facility of biological denitrification process, the anoxic biofilm reactor of two parallel operations.The device in mikrobe with the water inlet in organism as the denitrifying carbon source and the energy; With the nitre attitude ammonia in the recirculation water as denitrifying oxygen source; Carry out the denitrification deamination reaction under microbial film in the pond on the combined stuffing (facultative cenobium) effect, and make the NH in the waste water
3Pollution substance such as-N, COD is partly removed and is degraded.In order to make anoxic biofilm reactor performance the best use of, there is not short flow phenomenon, establish turning spurt water device at the bottom of the pond, water is presented to streamed operation.Be provided with semi soft packing in the anoxic biofilm reactor, be used to hang microbial film, biomembranous formation has improved the contact area of organism and sewage greatly, plays a decisive role to improving denitrification efficient.Controlled variable should be: PH=7.5; Water temperature: 30 ℃ (must not sharply change); Dissolved oxygen＜0.5mg/L; The backflow water yield of (bringing system into through recirculation water) about P:1mg/L is handled 2～3 times of the water yield by aerobe reactor and is operated the residence time: 8h.(6) aerobe reactor: aerobe reactor is one of core facility of biochemical treatment, and the biochemical reaction process of mikrobe mainly carries out in aerobe reactor.Ammonia nitrogen in the waste water is oxidized to nitre attitude ammonia, i.e. nitrifying process at this.The water outlet of anoxic biofilm reactor flows into aerobe reactor increases the dissolved oxygen in the aerobe reactor mixed solution, for mikrobe provides oxygen and mixed solution is stirred.Also need add soda ash (Na in addition
2CO
3) and microcosmic salt.Soda ash flows to segmentation by the aerobe reactor mixed solution and adds.Confirm added amount of chemical according to raw water quality; Sludge back flow quantity should be 2 to 3 times of the aerobe reactor processing water yield; Aerobe reactor is provided with the froth breaking waterpipe, and foam should be opened froth breaking waterpipe valve and carry out part or comprehensive froth breaking for a long time in aerobic bio-reactor.Aerobe reactor adopts conventional activated sludge process to handle, and aerobe reactor all adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use.Aerating apparatus: microporous diaphragm aerator, model YHQW-215.This part is mainly carried out nitrification and is taken the photograph the phosphorus process, removes the ammonia nitrogen in the water effectively, significantly reduces COD content.(7) horizontal sedimentation tank: outputted aerobic water contains a large amount of suspended substances, need remove suspended substance, adopts rectangular sedimentation tank.Horizontal sedimentation tank is mainly used in and separates the aerobic muddy water mixed solution that comes out, and mixed liquor flows by gravity is carried out mud-water separation from flowing into settling tank, and its part effluent recycling to anoxic winding shaft is sent into the anoxic biofilm reactor with water pump through turning spurt water device; The mud that is sunken at the bottom of the settling tank pond is sent aerobe reactor back to through suction dredger.(8) coagulation reaction tank: the design adopts mechanical coagulation agitated pool, and dosing coagulant, oxygenant continue degraded and precipitating organic matters, guarantee that water outlet is up to standard.Coagulating agent uses PAC (Poly aluminum Chloride (PAC)).(9) inclined-plate clarifying basin: the water to behind the coagulating precipitates, and continues to remove the throw out that flocculation produces.(10) sludge thickener: sludge thickener is collected the mud of inclined-plate clarifying basin, the regular spoil disposal generation of horizontal sedimentation tank, mud is concentrated, to reduce moisture percentage in sewage sludge.Post precipitation is sent to band filter and filters.(11) sludge treatment: because this treatment process active sludge settling ratio has only 10%; The surplus sludge volume that produces water is less; Therefore no longer consider facilities such as mechanical sludge dewatering, excess sludge is sent into sludge thickener and is handled, and the moisture percentage in sewage sludge after concentrating is 97～98%; Send into coal yard by sludge pump then and spray, the sludge thickener supernatant flow to Aerobic Pond or sends Aerobic Pond back to through sludge pump through overflow.(12) intermediate pool: intermediate pool is the water outlet of collecting the biochemical treatment system in early stage, is used to get into follow-up system for advanced treatment and recycle, can further clarify the water inlet that gets into the subsequent disposal system simultaneously.
Three embrane method advanced treatment subsystems explanation: though the coking wastewater containing phenol and cyanide is through biochemical pre-treatment; But the suspended substance in the waste water, organic pollutant, saltiness etc. are all higher; Prussiate, COD and ammonia nitrogen are difficult to up to standard; So independent development " three embrane methods " advanced treatment subsystem advanced treatment is removed or is reduced remaining a large amount of impurity component, is recirculated cooling water with its reuse then.So-called " three embrane methods " advanced treatment subsystem is exactly ceramic membrane filter, ultrafiltration membrance filter and nf membrane to be filtered three kinds of methods effectively combine the advanced treatment of carrying out the coking wastewater containing phenol and cyanide.
The explanation of three embrane method advanced treatment subsystem each several parts: (1) ceramic membrane filter device: ceramic membrane has characteristics such as higher thermostability, physical strength, resistance to corrosion, anti-swelling ability and stain resistance, and it is big to handle flow, makes simply, and the life-span is longer.Experiment shows, the wastewater effluent water conditioning of utilizing the ceramic membrane filter device to handle, and indexs such as suspension content, oleaginousness and particle diameter are all better in the water.The design chooses the ceramic membrane filter device with suitable parameter, and the coking wastewater containing phenol and cyanide that biochemistry is pretreated filters under certain pressure, can remove oil and larger particles suspended substance, PM for particulate matter in the waste water well.Get into intermediate pool through the filtering waste water of ceramic membrane filter device, for next step processing is prepared.(2) ultrafiltration membrance filter device: ultra-filtration membrane is a kind of film between microfiltration membrane and nf membrane, the liquid phases separation of utilizing ultra-filtration membrane under the impellent effect of static pressure difference, to carry out.In the solution of film both sides, have pressure difference, solvent in the liquid stock and little solute particle see through film from high pressure feed liquid side and enter into low-tension side, and general the title filtrates; Macromole and particulate constituent then tunicle stop that feed liquid is concentrated gradually and then discharges with liquid concentrator.The design cooperates the ceramic membrane filter device, chooses the ultrafiltration membrance filter device ultrafiltration waste water with suitable parameter, can effectively remove the macromolecular substance such as suspended particle, colloid, turbidity and pathogenic bacteria in the water.Get into intermediate pool through the filtering waste water of ultrafiltration membrance filter device, for next step processing is prepared.(3) nf membrane strainer: it is the solute particle about 1nm that nf membrane is mainly removed diameter, and the trapped substance relative molecular mass is 200～1000.A very big characteristic of nf membrane is that membrane body has electric charge, and can under low pressure very, have higher desalination performance is hundreds of materials with holding back relative molecular mass, also can remove inorganic salt.The nf membrane strainer filtered wastewater that the design cooperates ceramic membrane filter device and ultrafiltration membrance filter device to choose to have suitable parameter, the result shows that nanofiltration is to organism, total hardness, Ca in the water
2+The plasma removal effect is obvious.Pass through " three embrane methods " advanced treatment again through after the biochemical pre-treatment, each item index of coking wastewater containing phenol and cyanide all can reach the resident living water standard.(4) product pond: flow into the product pond through the water after the nanofiltration filter process.The effect in product pond is exactly that the waste water of collecting and storing is after treatment prepared against reuse.
This coking wastewater containing phenol and cyanide is handled the characteristics of reuse technology: A. coking production waste water is accomplished biochemical pretreatment technology through oil removing-equalizing tank-air supporting successively, and sanitary wastewater injects the coking wastewater containing phenol and cyanide and handles reclaiming system before equalizing tank.B. above-mentioned pretreated waste water passes through anerobic-anoxia-aerobic-coagulated precipitation-sloping plate deposition-intermediate pool successively.C. the waste water after the biochemical treatment is through ceramic membrane filter device-ultrafiltration membrance filter device-nf membrane strainer.What need special instruction is: turning spurt water device is established in anoxic biofilm reactor bottom, does not have short flow phenomenon, and water is presented to streamed operation; Be provided with the carbon fibers filler in the anoxic biofilm reactor, be used to hang microbial film.Anoxic biofilm reactor parameter is controlled at: pH=7.5; Water temperature: 30 ℃ (must not sharply change); Dissolved oxygen＜0.5mg/L; The backflow water yield of (bringing system into through recirculation water) about P:1mg/L is handled 2～3 times of the water yield by aerobe reactor and is operated the residence time: 8h.Aerobe reactor adopts activated sludge process to handle, and is flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use.Aerobe reactor need add soda ash (Na
2CO
3) and microcosmic salt; Sewage total amount Q=4080m
3/ d, aerobe reactor hydraulic detention time HRT=16h is about sludge age SRT=100d.Aerobe reactor mixed solution dissolved oxygen (DO): 2～4mg/L; Basicity is with (CaCO
3) meter＞200mg/L; About MLSS:3g/L; PH:7～7.5; HRT:16h; Reflux ratio: 250～300%.Coagulating agent adds PAC (Poly aluminum Chloride (PAC)) in the coagulating sedimentation.The coagulative precipitation tank water outlet gets into inclined-plate clarifying basin and further precipitates water outlet ss suspended solid :≤150mg/L.The inclined-plate clarifying basin water outlet gets into ceramic membrane filter device → ultrafiltration membrance filter device → nf membrane strainer and further reduces COD, the ammonia nitrogen of water, and is as shown in table 1, COD:140-200mg/L; Ammonia nitrogen: 14-25mg/L; COD:18.9-22.68mg/L in the water outlet; Phenol: 0.05-0.2mg/L; CN:0.01-0.2mg/L; Oil:＜1mg/L; Ammonia nitrogen: 2-4mg/L; SS:0mg/L; PH:7-7.5.
Table 1: " three embrane methods " handled coking wastewater containing phenol and cyanide effluent quality (pH value non-dimensional, other index units are mg/L)
The simultaneous test of the present invention and prior art is following: COD and NH
3-N is respectively the coking wastewater containing phenol and cyanide of 3500mg/L and 200mg/L, deoils through oil trap earlier, then gets into equalizing tank, and equalizing tank preaeration is handled the removal partial organic substances through air supporting.Again through anaerobism, anoxic, aerobe reaction (A
2-O), anaerobism, anoxic bio-reactor hydraulic detention time are 8h, aerobe reaction tank hydraulic detention time is 16h, and part effluent recycling to the anoxic biological reaction tank of aerobe reactor, reflux ratio is 250%～300%.Dissolved oxygen concentration is controlled at 2～4mg/L in the aerobe reactor, and pH value is controlled at about 7.5.Mud gets into sludge thickener, is sent to coal yard and does the sprinkling water.Above-mentioned treating water gets into coagulation reaction tank, adds coagulating agent PAC (Poly aluminum Chloride (PAC)), behind settling tank, gets into intermediate pool.The composition contrast of intermediate pool water quality and existing coking wastewater containing phenol and cyanide water quality treatment is like following table 2, shown in 3:
The existing coking wastewater containing phenol and cyanide of table 2 is handled reclaiming system second pond effluent quality
| Project | Numerical value | Project | Numerical value |
| PH value (non-dimensional) | 6.4～9.3 | Ammonia nitrogen/(mgL -1) | ≤50 |
| TDS/(mg·L -1) | ≤2000 | Cl -/(mg·L -1) | ≤400 |
[0032]
| Total hardness/(mgL -1) | ≤300 | Fe/ (mgL -1) | ≤0.1 |
| SS/ (mgL -1) | ≤80 | Mn/ (mgL -1) | ≤0.1 |
| COD/ (mgL -1) | ≤400 | BOD 5/ (mgL -1) | ≤15 |
| Oil/(mgL -1) | ≤10 | Total phosphorus/(mgL -1) | ≤3 |
The coking wastewater containing phenol and cyanide was handled the reclaiming system effluent quality after table 3 adopted the present invention
| Project | Numerical value | Project | Numerical value |
| PH value (non-dimensional) | 6.7～8.5 | Cl -/(mg·L -1) | ≤200 |
| Total hardness/(mgL -1) | ≤40 | Fe/(mg·L -1) | ≤0.04 |
| Total alkalinity/(mgL -1) | ≤270 | Mn/(mg·L -1) | ≤0.04 |
| BOD 5/(mg·L -1) | ≤8 | Ammonia nitrogen/(mgL -1) | ≤25 |
| COD/(mg·L -1) | ≤180 | Total phosphorus/(mgL -1) | ≤1 |
| TDS/(mg·L -1) | ≤500 | Coliform, individual/L | ≤600 |
Can know that by data contrast in the table the present invention's poisonous and harmful substances in the coking wastewater containing phenol and cyanide of can effectively degrading reduces pollutant loads such as COD in the waste water, ammonia nitrogen.The present invention increases turning spurt water device on the basis of existing biochemical treatment, change common combined stuffing into the carbon fibers filler, has characteristics such as technology is reasonable, wastewater treatment purification rate height, waste water comprehensive utilization.
Indicate at this, more than narration helps it will be apparent to those skilled in the art that the invention, but and the protection domain of unrestricted the invention.Any do not break away from the invention flesh and blood to being equal to replacement, modify improving and/or deleting numerous conforming to the principle of simplicity and the enforcement carried out of above narration, all fall into the protection domain of the invention.
Claims (10)
1. a coking wastewater containing phenol and cyanide is handled reclaiming system, it is characterized in that, comprises the biochemical preprocessing subsystem of coking wastewater containing phenol and cyanide and is connected three embrane method advanced treatment subsystems with it; The biochemical preprocessing subsystem of said coking wastewater containing phenol and cyanide comprises anaerobe membrane reactor, anoxic biofilm reactor and the aerobe reactor that connects successively; Said aerobe reactor connects horizontal sedimentation tank; Said horizontal sedimentation tank connects coagulation reaction tank; Said coagulation reaction tank connects inclined-plate clarifying basin, and said inclined-plate clarifying basin connects first intermediate pool; Said three embrane method advanced treatment subsystems comprise ceramic membrane filter device, ultrafiltration membrance filter device and nf membrane strainer; Said ceramic membrane filter device connects said first intermediate pool; And connecting said ultrafiltration membrance filter device through second intermediate pool, said ultrafiltration membrance filter device connects said nf membrane strainer through the 3rd intermediate pool.
2. coking wastewater containing phenol and cyanide according to claim 1 is handled reclaiming system, it is characterized in that, said nf membrane strainer connects the product pond, and said product pond connects reuse water and sends pipeline outside.
3. coking wastewater containing phenol and cyanide according to claim 1 is handled reclaiming system; It is characterized in that; Said anaerobe membrane reactor connects the jet air float machine; The water outlet of said jet air float machine gets into said anaerobe membrane reactor by gravity, and the dregs of fat outlet of said jet air float machine connects dregs of fat pond, and the light oil outlet of said jet air float machine connects the light oil pond.
4. coking wastewater containing phenol and cyanide according to claim 3 is handled reclaiming system, it is characterized in that, said jet air float machine connects the equalizing tank water outlet, is provided with the underwater jet aeration device in the said equalizing tank.
5. coking wastewater containing phenol and cyanide according to claim 4 is handled reclaiming system, it is characterized in that, said equalizing tank connects the grease removal tank water outlet, is provided with tubular type oil skimming machine in the said grease removal tank, and the water outlet of said grease removal tank gets into said equalizing tank through pipeline self.
6. coking wastewater containing phenol and cyanide according to claim 4 is handled reclaiming system, it is characterized in that the side between the import of said equalizing tank and the outlet of said grease removal tank is provided with accident pool.
7. coking wastewater containing phenol and cyanide according to claim 6 is handled reclaiming system, it is characterized in that, the coking wastewater containing phenol and cyanide water-in pipeline of said grease removal tank is provided with sewage input aperture and other phenol water input.
8. coking wastewater containing phenol and cyanide according to claim 1 is handled reclaiming system, it is characterized in that said horizontal sedimentation tank all is connected sludge thickener through the mud passage with said inclined-plate clarifying basin, and said sludge thickener connects sludge treatment device; Mud at the bottom of the said horizontal sedimentation tank pond is sent aerobe reactor back to through suction dredger; The water outlet of said horizontal sedimentation tank is connected with and makes the recirculation water passage of part effluent recycling to anoxic winding shaft, and said anoxic winding shaft is between said anoxic biofilm reactor and said anaerobe membrane reactor; Said coagulation reaction tank connects chemicals dosing plant.
9. coking wastewater containing phenol and cyanide according to claim 1 is handled reclaiming system, it is characterized in that, said aerobe reactor adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor, be provided with in the said anoxic biofilm reactor and be used to hang biomembranous carbon fibers filler; Be provided with in the said anaerobe membrane reactor and be used to hang biomembranous carbon fibers filler.
10. a coking wastewater containing phenol and cyanide is handled reuse method, it is characterized in that, may further comprise the steps: after pending coking wastewater containing phenol and cyanide is carried out biochemical pre-treatment, also will carry out three embrane method advanced treatment; Said biochemical pre-treatment comprises that nitrated that the acidified degradation of oil removal treatment, the adjusting processing of carrying out successively, the air-dissolving air-float processing that utilizes the jet air float machine, anaerobe film reaction is handled, the biological denitrification process of anoxic biomembrane reaction is handled, aerobe reacts taken the photograph phosphorus processing, advection sedimentation processing, coagulating is handled and sloping plate deposition is handled; Said three embrane method advanced treatment comprise utilizes the filtration treatment ceramic membrane filter device, that ultrafiltration membrance filter device and nf membrane strainer carry out successively; Said aerobe reactor adopts flat flow aeration tank structure, adopts blast aeration, selects microporous diaphragm aerator for use; Establish turning spurt water device at the bottom of the pond of said anoxic biofilm reactor; Be equipped with in the said anoxic biofilm reactor and in the said anaerobe membrane reactor and be used to hang biomembranous carbon fibers filler; The coagulating agent that adopts during said coagulating is handled is a Poly aluminum Chloride (PAC).
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| CN102765861A (en) * | 2012-08-21 | 2012-11-07 | 江苏金海环保工程有限公司 | Phenol cyanide wastewater treatment system |
| CN103449684A (en) * | 2013-09-24 | 2013-12-18 | 济钢集团有限公司 | High-toxicity coking phenol-cyanogen waste water recycling system and method |
| CN104909517A (en) * | 2015-06-10 | 2015-09-16 | 北京格兰特膜分离设备有限公司 | Industrial production wastewater advanced treatment device |
| CN108358387A (en) * | 2018-03-07 | 2018-08-03 | 武汉东川自来水科技开发有限公司 | A kind of electroplating waste water treatment system and method |
| CN110683718A (en) * | 2019-11-08 | 2020-01-14 | 中冶南方都市环保工程技术股份有限公司 | Coking phenol cyanogen waste water intensive treatment system |
| CN110759601A (en) * | 2019-11-20 | 2020-02-07 | 兰州蓝星纤维有限公司 | Multipurpose carbon fiber production wastewater treatment system and method |
| CN111362496A (en) * | 2020-04-17 | 2020-07-03 | 莱特莱德（北京）环境技术股份有限公司 | Low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system and treatment process thereof |
| CN113371946A (en) * | 2021-07-12 | 2021-09-10 | 南京弘顺和生物科技有限公司 | Multi-membrane sewage treatment system and method thereof |
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