CN102874990A - Coking wastewater deep treatment process with three-membrane method and equipment thereof - Google Patents
Coking wastewater deep treatment process with three-membrane method and equipment thereof Download PDFInfo
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Abstract
The invention relates to a coking wastewater deep treatment process with a three-membrane method and equipment thereof. The process comprises the following steps that wastewater is led into a coagulating settling pond first, so that COD (Chemical Oxygen Demand) and suspended matters in the wastewater are reduced; secondly, the wastewater is led into a multi-media filter to be further filtered and then is led into a three-dimensional electrode reactor of a fluidized bed to carry out electrocatalytic oxidation; then the wastewater is led into an MBR (Membrane Biological Reactor), and the wastewater from the MBR can be directly used as low-level water; and also, the wastewater from the MBR can continue to depth treatment, the wastewater enters a cartridge filter so that the suspended matters and active sludge in the wastewater are removed, finally the wastewater enters an ultra-filtration device and a reverse osmosis device, the produced water after treatment can be used as high-level water. The equipment is mainly composed of the coagulating settling pond, the multi-media filter, the three-dimensional electrode reactor of the fluidized bed, the MBR, the cartridge filter, the ultra-filtration device and the reverse osmosis device. The process and the equipment have a reasonable design, the problems in the coking wastewater deep treatment and recycling are solved, and the process and the equipment have a stronger engineering application value. The produced water can meet the requirements of different levels of water.
Description
Technical field
The present invention relates to environmental technology field, refer to particularly a kind of three embrane method advanced treatment process of coking waste water and equipment thereof.
Background technology
Coking chemical waste water is a kind of trade effluent of generally acknowledged difficult for biological degradation, its difficulty is that the biodegradability of waste water is poor, except inorganic pollution beyond the region of objective existences such as ammonia, cyanogen and thiocyanates, also contain the heterocycle such as phenols, naphthalene, pyridine, quinoline and polycyclc aromatic compound (PAHS) etc. and be difficult to biodegradable goods and materials, these materials can produce long-range effects to environment, and the studied carcinogenic substance that turns out to be of part, ammonia nitrogen in high density has very strong restraining effect to microorganism active in addition, and Nitrogen removal effect is not good.At present, coking wastewater processing system generally includes conventional two stages for the treatment of.Coagulation refers to recycle pollutent from high-concentration sewage, its technique comprises ammonia distillation, ammoniacal liquor dephenolize, whole cold water decyanation etc., is preprocessing process.Second-stage treatment then refers to the phenol-cyanogen sewage harmless treatment, take activated sludge process as main, also comprises enhanced biological treatment technology etc.Because further the advanced treatment somewhat expensive makes domestic many coke-oven plants hang back, so most coking chemical waste water has only just directly discharged through conventional two stages for the treatment of.But waste water through after the above-mentioned processing wherein some poisonous and harmful substances (prussiate, COD and heterogeneous ring compound etc.) still do not reach the emission standard that country allows.
At present, the outstanding problem that advanced treatment process of coking waste water exists is as follows: one, by the chemical agent advanced treatment of waste water, and the method may be introduced secondary pollution, and perhaps causing increases follow-up desalination expense; Two, coking chemical waste water is used for wet quenching or blast furnace slag flushing, but transfer has occured Pollutants in Wastewater, operating environment is poor simultaneously, has the problems such as pipe network and equipment corrosion; Three, the dense water whereabouts after the embrane method desalination advanced treatment also is to need the problem of solution badly.
In order to promote industrial structure upgrading, standard industry healthy development, to promote energy-saving and emission-reduction and technical progress, China Ministry of Industry and Information has promulgated No. 15 files of " coking industry entry criteria (2008 revision) " on December 19th, 2008, and clearly define: will recycle after the wastewater containing phenol and cyanide processing is qualified, must not efflux.Therefore, it is to improve the waste water circulation rate, reduce wastewater disposition, reduce the optimal selection of new water consumption that coking chemical waste water is carried out advanced treatment and reuse, and seek a kind of efficiently, advanced treatment and reuse technology are the active demands of present coking wastewater deep treatment process cheaply.
Summary of the invention
Purpose of the present invention will change traditional coking waste water treatment process exactly, and a kind of economic, practical, efficient three embrane method advanced treatment process of coking waste water and equipment thereof are provided.Its current collection catalyzed oxidation technology, membrane bioreaction technology, ultrafiltration and reverse osmosis technology are integrated, and the secondary pollution that can effectively avoid adopting the processing waste water such as other chemical agents to cause reduces the processing cost of coking chemical waste water, saves a large amount of water of productive use.
For achieving the above object, three embrane method advanced treatment process of coking waste water provided by the invention are processes that the coking chemical waste water after processing through conventional Two-Stage Biochemical is processed again, and this technique comprises the steps:
1) will be delivered to through the coking chemical waste water that Two-Stage Biochemical is processed in the mixed heavy pond, and make it under the effect of flocculation agent and coagulant aids, carry out precipitation process, the waste water after obtaining to precipitate;
2) waste water after will precipitating is delivered to and carries out filtration treatment in the more medium filter, and mud, concentration of suspension with in the further reduction waste water obtain filtering rear waste water;
3) will filter after waste water be delivered to and carry out electrocatalysis oxidation reaction in the fluid bed three-dimensional electrode reactor, impel the organic substance of bio-refractory in the waste water to be degraded into small molecules or CO by the hydroxyl radical free radical oxidation and with larger molecular organics and arene compound
2, obtain the waste water after the oxidation;
4) waste water after the oxidation is delivered to carries out continuous aeration in the MBR membrane bioreactor and process, so that the further biochemical degradation of small molecules is wherein also held back simultaneously part mud, suspended substance;
5) will be through the waste water after the continuous aeration processing directly as defoamer water, coal yard dust suppression water, reclaimed water or other inferior grade water in the biological process; Perhaps:
6) waste water after will processing through continuous aeration be delivered in the cartridge filter further filtration treatment, with filtering wherein active sludge and the suspended substance of the overwhelming majority;
7) waste water after will filtering through security personnel be delivered to and carry out essence in the ultra-filtration equipment and filter, to remove colloid, the macromolecular cpd in the waste water;
8) will be delivered to through the waste water after the essence filter and carry out desalination in the reverse osmosis unit and process, gained desalination waste water recycling is made technique recirculated cooling water or other high-grade water, and reverse osmosis dense water out can be used as blast-furnace slag cooling flushing cinder water, coal yard dust suppression water, road-cleaning water or other inferior grade waters.
As preferred version, in the described step 1), flocculation agent adopts polymeric ferrous sulphate solution and/or polymeric aluminum chlorides solution, and the concentration after it adds in waste water is 200 ~ 800mg/L, coagulant aids adopts polyacrylamide, and the concentration after it adds in waste water is 0.5 ~ 10mg/L.
As preferred version, described step 2) in, it is the hard coal of 0.5 ~ 2mm, the haydite of 3 ~ 6mm and three layers of combination of quartz sand of 4 ~ 10mm that the filtrate in the more medium filter adopts particle diameter.
As preferred version, in the described step 3), the granule electrode of fluid bed three-dimensional electrode reactor adopts the coke granule of metallizing compound, and its current density is that 20 ~ 100mA/cm2, the waste water residence time therein is 30 ~ 60min.
As preferred version, in the described step 4), the aeration intensity in the MBR membrane bioreactor is controlled at 0.15 ~ 0.5m
3/ h, dissolved oxygen concentration are that 1.5 ~ 8mg/L, film cleaning interval are 10 ~ 15d.
Be the three embrane method coking wastewater deep treatment equipment of realizing that above-mentioned technique designs, comprise mixed heavy pond, more medium filter, fluid bed three-dimensional electrode reactor, the MBR membrane bioreactor, cartridge filter, ultra-filtration equipment and reverse osmosis unit, its special character is: the coking chemical waste water outlet in described mixed heavy pond links to each other with the import of more medium filter, the outlet of described more medium filter links to each other with the waste water input terminus of fluid bed three-dimensional electrode reactor, the air input terminus of described fluid bed three-dimensional electrode reactor links to each other with gas blower, the waste water output terminal of described fluid bed three-dimensional electrode reactor links to each other with the water-in of MBR membrane bioreactor, the aeration opening of described MBR membrane bioreactor links to each other with aeration pump, the water outlet of described MBR membrane bioreactor links to each other with the import of cartridge filter by suction pump, the outlet of described cartridge filter links to each other with the input aperture of ultra-filtration equipment, and the delivery port of described ultra-filtration equipment links to each other with the former water input terminus of reverse osmosis unit.
As preferred version, described fluid bed three-dimensional electrode reactor comprises cell body, be provided with the sealing support frame in the described cell body, described sealing support frame middle part is provided with air distribution plate, be provided with aerator in the cell body of described air distribution plate below, the air input terminus of described aerator links to each other with gas blower; Be provided with water distributor in the cell body of described aerator below, the waste water input terminus of described water distributor links to each other with the outlet of more medium filter; Described sealing support frame top is provided with negative electrode and positive electrode, be scattered with fluidised granule electrode in the cell body around described negative electrode and the positive electrode, the top waste water output terminal of described cell body is provided be used to the hole plate that prevents that granule electrode from escaping, and described hole plate communicates with the water-in of MBR membrane bioreactor.
Further, the spacing of described air distribution plate and aerator is 5 ~ 25mm, and the qi-emitting hole diameter on the described air distribution plate is 1 ~ 2mm; Ventilating pit diameter on the described aerator is 2 ~ 5mm; Posticum diameter on the described water distributor is 2 ~ 5mm.
Further, described negative electrode and positive electrode are tabular or cylinder-like structure, or the reticulated structure corresponding with above-mentioned shape; It is the coke granule that is coated with metallic compound of 2 ~ 10mm that described granule electrode adopts particle diameter.
Again further, described MBR membrane bioreactor comprises the reaction tank body, the water-in of described reaction tank body links to each other with the waste water output terminal of fluid bed three-dimensional electrode reactor, be set side by side with immersion MBR membrane module in the described reaction tank body, the aeration opening of described immersion MBR membrane module links to each other with aeration pump, the water outlet of described MBR membrane module links to each other with suction pump, and the sewage draining exit of described reaction tank body links to each other with residual sea water pump.
Compared with prior art, the present invention has following advantage:
One, this technique and equipment design thereof are reasonable, can further degrade to the hardly degraded organic substance in the coking biochemical system, satisfy the needs of follow-up MBR membrane bioreactor biochemical treatment.Simultaneously, more medium filter, MBR membrane bioreactor, cartridge filter have significantly reduced the suspended substance in the waste water, no matter be to the fluid bed three-dimensional electrode reactor degradation efficiency, or to prolonging the work-ing life of ultra-filtration equipment, reverse osmosis unit, all obtained increasing substantially, guaranteed that running cost is cheap, solved the difficult problem in coking wastewater deep treatment and the reuse, had very strong engineering using value.
Its two, this technique and operation of equipment thereof are simple, running cost is lower, effluent quality can satisfy the requirement of different grades water.
They are three years old, this technique and equipment thereof have carried out the lab scale test of 25L/h in Metallurgical Waste Water recycle laboratory, experiment effect proves: it can satisfy the requirement of coking wastewater deep treatment and reuse, the COD clearance can reach more than 80%, for the waste water of specific conductivity between 300 ~ 1500 μ s/cm, its desalination rate can reach 90%, gets the water rate about 40 ~ 70%, and cost for wastewater treatment per ton is about 4 ~ 6 yuan.
Description of drawings
Fig. 1 is the structural representation of three embrane method coking wastewater deep treatment equipment of the present invention.
Fig. 2 is the main TV structure schematic diagram of fluid bed three-dimensional electrode reactor among Fig. 1.
Fig. 3 is that A-A of Fig. 2 analyses and observe the structure for amplifying schematic diagram.
Fig. 4 is the main TV structure schematic diagram of MBR membrane bioreactor among Fig. 1.
Fig. 5 is that advanced treatment device shown in Figure 1 is to the UV spectral scan figure before and after the Treatment of Coking Effluent.
Among the figure: mixed heavy pond 1, more medium filter 2, fluid bed three-dimensional electrode reactor 3(wherein: water distributor 301, cell body 302, granule electrode 303, negative electrode 304, positive electrode 305, hole plate 306, sealing support frame 307, air distribution plate 308, aerator 309), MBR membrane bioreactor 4(wherein: reaction tank body 401, immersion MBR membrane module 402, residual sea water pump 403), cartridge filter 5, ultra-filtration equipment 6, gas blower 7, aeration pump 8, suction pump 9, mud vent pipe 10, concentrated water drainage goes out pipe 11, produce water discharge pipe 12, reverse osmosis unit 13, coking chemical waste water input tube 14, flocculation agent adds mouth 15, sludge outlet 16, coking water outlet UV spectral scan curve m, coking water inlet UV spectral scan curve n.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, three embrane method coking wastewater deep treatment equipment of the present invention, comprise mixed heavy pond 1, more medium filter 2, fluid bed three-dimensional electrode reactor 3, MBR membrane bioreactor 4, cartridge filter 5, ultra-filtration equipment 6 and reverse osmosis unit 13, the coking chemical waste water outlet in mixed heavy pond 1 links to each other with the import of more medium filter 2, the outlet of more medium filter 2 links to each other with the waste water input terminus of fluid bed three-dimensional electrode reactor 3, the air input terminus of fluid bed three-dimensional electrode reactor 3 links to each other with gas blower 7, the waste water output terminal of fluid bed three-dimensional electrode reactor 3 links to each other with the water-in of MBR membrane bioreactor 4, the aeration opening of MBR membrane bioreactor 4 links to each other with aeration pump 8, the water outlet of MBR membrane bioreactor 4 links to each other with the import of cartridge filter 5 by suction pump 9, the outlet of cartridge filter 5 links to each other with the input aperture of ultra-filtration equipment 6, and the delivery port of ultra-filtration equipment 6 links to each other with the former water input terminus of reverse osmosis unit 13.
As shown in Figures 2 and 3, above-mentioned fluid bed three-dimensional electrode reactor 3 comprises cell body 302, be provided with sealing support frame 307 in the cell body 302, sealing support frame 307 middle parts are provided with air distribution plate 308, be provided with aerator 309 in the cell body 302 of air distribution plate 308 belows, the air input terminus of aerator 309 links to each other with gas blower 7; Be provided with water distributor 301 in the cell body 302 of aerator 309 belows, the waste water input terminus of water distributor 301 links to each other with the outlet of more medium filter 2; Sealing support frame 307 tops are provided with negative electrode 304 and positive electrode 305, be scattered with fluidised granule electrode 303 in the cell body 302 around negative electrode 304 and the positive electrode 305, the top waste water output terminal of cell body 302 is provided be used to the hole plate 306 that prevents that granule electrode 303 from escaping, and hole plate 306 communicates with the water-in of MBR membrane bioreactor 4.Air distribution plate 308 is 5 ~ 25mm with the spacing of aerator 309, and the qi-emitting hole diameter on the air distribution plate 308 is 1 ~ 2mm; Ventilating pit diameter on the aerator 309 is 2 ~ 5mm; Posticum diameter on the water distributor 301 is 2 ~ 5mm.In the present embodiment, negative electrode 304 and positive electrode 305 preferred plate-like structures can certainly adopt cylinder-like structure, or the reticulated structure corresponding with above-mentioned shape.Granule electrode 303 preferable particle size are the coke granule that is coated with metallic compound of 2 ~ 10mm, and this metallic compound refers to the nitrate of carrying transition metal (such as Ni, Fe, Cu, Co, Mn, Zn), such as Ni (NO
3)
2, Fe (NO
3)
3, Cu (NO
3)
2, Co (NO
3)
2And Mn (NO
3)
2,Zn (NO
3)
2Deng one or more.
As shown in Figure 4, above-mentioned MBR membrane bioreactor 4 comprises reaction tank body 401, the water-in of reaction tank body 401 links to each other with the waste water output terminal of fluid bed three-dimensional electrode reactor 3, be set side by side with immersion MBR membrane module 402 in the reaction tank body 401, the aeration opening of immersion MBR membrane module 402 links to each other with aeration pump 8, and the water outlet of MBR membrane module 402 links to each other with suction pump 9, and the sewage draining exit of reaction tank body 401 links to each other with residual sea water pump 403, residual sea water pump 403 is submersible pump, is installed in the reaction tank body 401.
The principle of work of above-mentioned three embrane method coking wastewater deep treatment equipment is as follows: the active sludge in the waste water after Two-Stage Biochemical is processed in mixed heavy pond 1 carries out flocculation sediment, reduces COD and suspended substance in the waste water.More medium filter 2 can further reduce the concentration of suspension in the waste water, reduces the materials such as clay that pole plate adheres to, and also reduces the impact to fluid bed three-dimensional electrode reactor 3 simultaneously, prolongs electrode life, guarantees fluid bed three-dimensional anodizing efficient.Fluid bed three-dimensional electrode reactor 3 impels the organic substance of bio-refractory in the coking chemical waste water by the hydroxyl radical free radical oxidation, and larger molecular organics in the waste water and arene compound are degraded into small molecules or CO
2MBR membrane bioreactor 4 mainly by high-concentration activated sludge to the further biochemical degradation of micromolecular compound, also hold back simultaneously the partial suspended thing.Cartridge filter 5 mainly further filters MBR membrane bioreactor 4 partial suspended thing out, satisfies the water inlet requirement of ultra-filtration equipment.Ultra-filtration equipment 6 and reverse osmosis unit 13 make effluent quality can satisfy the requirement of different grades water mainly to the further advanced treatment of waste water, sterilization, desalination, removal part COD.The inferior grade water can directly be used as from MBR membrane bioreactor 4 waste water out, such as defoamer water, coal yard dust suppression etc. in the deepening process; Go out pipe 11 dense water out from the concentrated water drainage of reverse osmosis unit 13 and can be directly used in blast-furnace slag cooling, flushing cinder water, coal yard dust suppression etc., but make technique recirculated cooling water or other high-grade water from the product water discharge pipe 12 product water reuse out of reverse osmosis unit 13.
The specific works process of above-mentioned three embrane method coking wastewater deep treatment equipment is as follows: add flocculation agent and coagulant aids in the coking chemical waste water of need in-depth processing, flocculation agent adopts polymeric ferrous sulphate solution and/or polymeric aluminum chlorides solution, concentration after it adds in waste water is 200 ~ 800mg/L, coagulant aids adopts polyacrylamide, and the concentration after it adds in waste water is 0.5 ~ 10mg/L.Then waste water is introduced mixed pond, shallow lake 1, reduced COD and suspended substance in the part waste water.1 processed waste water enters more medium filter 2 through mixed pond, shallow lake, it is the hard coal of 0.5 ~ 2mm, the haydite of 3 ~ 6mm and three layers of combination of quartz sand of 4 ~ 10mm that filtrate in the more medium filter 2 adopts particle diameter, after further filtering, be delivered to fluid bed three-dimensional electrode reactor 3, fluid bed three-dimensional electrode reactor 3 interior required airs come from gas blower 7, and the current density of fluid bed three-dimensional electrode reactor 3 is 20 ~ 100mA/cm
2, the waste water residence time therein is 30 ~ 60min, behind catalytic oxidation, waste water enters MBR membrane bioreactor 4.
MBR membrane bioreactor 4 adopts the immersion structure, and the aeration form adopts aeration pump 8 continuous aerations, and aeration intensity is controlled at 0.15 ~ 0.5m
3/ h, dissolved oxygen (DO) concentration is 1.5 ~ 8mg/L, the film cleaning interval is 10 ~ 15d.Mud adopts the mud that Aerobic Pond refluxes in coke-oven plant's biochemical treatment process, purpose be by high-concentration activated sludge to the further biochemical degradation of micromolecular compound, also hold back the partial suspended thing simultaneously.After waste water enters MBR membrane bioreactor 4, through the water after aerobic aeration and the biological treatment, by suction pump 9 by extracting out behind the membrane filtration, mud is then sucked from mud vent pipe 10 by residual sea water pump 403 and discharges, together be discharged to the mud centralized pool with the mud in the mixed heavy pond 1, machinery is drawn and is dug outward transport after the digestion, and supernatant liquor passes back into mixed heavy pond 1.
The waste water of being extracted out by suction pump 9 can directly be used as the inferior grade water, such as defoamer water, coal yard dust suppression etc. in the deepening process, also can continue advanced treatment and enter cartridge filter 5, cartridge filter 5 operation scheme adopt the backwash type, inlet outlet pressure differential is greater than 0.15MPa, its objective is and further to filter from MBR membrane bioreactor 4 partial suspended thing out, reduce the impact to reverse osmosis membrane in the follow-up reverse osmosis unit 13.
After waste water is removed suspended substance and active sludge through cartridge filter 5; enter again ultra-filtration equipment 6; ultra-filtration equipment 6 adopts modularized equipment; purpose is that the colloid in the waste water and larger molecular organics are removed; stay the inorganic salts such as sodium salt; simultaneously, also play the effect of reverse osmosis membrane in the protection reverse osmosis unit 13.
Waste water is removed after colloid, the macromolecular cpd through ultra-filtration equipment 6, enter reverse osmosis unit 13, reverse osmosis unit 13 also adopts modularized equipment, and purpose is to the further advanced treatment desalination of waste water, remove part COD, make effluent quality can satisfy the requirement of different grades water.Be used for blast-furnace slag cooling, flushing cinder water, coal yard dust suppression etc. from reverse osmosis unit 13 dense water out, from reverse osmosis unit 13 product water out as high-grade water, such as the moisturizing of circulating cooling system etc.
Figure 5 shows that in the invention process process, the UV spectral scan curve (being the UV scanning curve) before and after the Treatment of Coking Effluent, among the figure: m is coking water outlet UV spectral scan curve, n is coking water inlet UV spectral scan curve.Can find out from the curve of Fig. 5, through after the present device advanced treatment, the absorbancy of coking chemical waste water significantly reduces, and illustrates that most of organism in the waste water is degraded or mineralising is subdued.
The present invention is on the basis of mixed heavy pond, fluid bed three-dimensional electrode reactor, and the degradation effect that can make first COD in the waste water is greater than 40%, and biodegradability significantly improves simultaneously, is conducive to the operation of MBR membrane bioreactor.By the further processing of follow-up MBR membrane bioreactor, ultra-filtration equipment and reverse osmosis unit, the COD clearance will be greater than 70% in the waste water, and gained produces the COD of water, the requirement that specific conductivity all can satisfy industrial circulating cooling water.Simultaneously, fluid bed three-dimensional electrode reactor just improves the biodegradability of coking chemical waste water among the present invention, is not that the organism in the coking chemical waste water is carried out thorough mineralising, and therefore, cost for wastewater treatment is significantly reduced.
Claims (10)
1. an embrane method advanced treatment process of coking waste water is the process that the coking chemical waste water after processing through conventional Two-Stage Biochemical is processed again, and this technique comprises the steps:
1) will be delivered to through the coking chemical waste water that Two-Stage Biochemical is processed in the mixed heavy pond, and make it under the effect of flocculation agent and coagulant aids, carry out precipitation process, the waste water after obtaining to precipitate;
2) waste water after will precipitating is delivered to and carries out filtration treatment in the more medium filter, and mud, concentration of suspension with in the further reduction waste water obtain filtering rear waste water;
3) will filter after waste water be delivered to and carry out electrocatalysis oxidation reaction in the fluid bed three-dimensional electrode reactor, impel the organic substance of bio-refractory in the waste water to be degraded into small molecules or CO by the hydroxyl radical free radical oxidation and with larger molecular organics and arene compound
2, obtain the waste water after the oxidation;
4) waste water after the oxidation is delivered to carries out continuous aeration in the MBR membrane bioreactor and process, so that the further biochemical degradation of small molecules is wherein also held back simultaneously part mud, suspended substance;
5) will be through the waste water after the continuous aeration processing directly as defoamer water, coal yard dust suppression water, reclaimed water or other inferior grade water in the biological process; Perhaps:
6) waste water after will processing through continuous aeration be delivered in the cartridge filter further filtration treatment, with filtering wherein active sludge and the suspended substance of the overwhelming majority;
7) waste water after will filtering through security personnel be delivered to and carry out essence in the ultra-filtration equipment and filter, to remove colloid, the macromolecular cpd in the waste water;
8) will be delivered to through the waste water after the essence filter and carry out desalination in the reverse osmosis unit and process, gained desalination waste water recycling is made technique recirculated cooling water or other high-grade water, and reverse osmosis dense water out can be used as blast-furnace slag cooling flushing cinder water, coal yard dust suppression water, road-cleaning water or other inferior grade waters.
2. three embrane method advanced treatment process of coking waste water according to claim 1, it is characterized in that: in the described step 1), flocculation agent adopts polymeric ferrous sulphate solution and/or polymeric aluminum chlorides solution, concentration after it adds in waste water is 200 ~ 800mg/L, coagulant aids adopts polyacrylamide, and the concentration after it adds in waste water is 0.5 ~ 10mg/L.
3. three embrane method advanced treatment process of coking waste water according to claim 1 is characterized in that: described step 2), it is the hard coal of 0.5 ~ 2mm, the haydite of 3 ~ 6mm and three layers of combination of quartz sand of 4 ~ 10mm that the filtrate in the more medium filter adopts particle diameter.
4. three embrane method advanced treatment process of coking waste water according to claim 1 is characterized in that: in the described step 3), the granule electrode of fluid bed three-dimensional electrode reactor adopts the coke granule of metallizing compound, and its current density is 20 ~ 100mA/cm
2, the waste water residence time therein is 30 ~ 60min.
5. three embrane method advanced treatment process of coking waste water according to claim 1, it is characterized in that: in the described step 4), the aeration intensity in the MBR membrane bioreactor is controlled at 0.15 ~ 0.5m
3/ h, dissolved oxygen concentration are that 1.5 ~ 8mg/L, film cleaning interval are 10 ~ 15d.
6. three embrane method coking wastewater deep treatment equipment for realizing that the described technique of claim 1 designs, comprise mixed heavy pond (1), more medium filter (2), fluid bed three-dimensional electrode reactor (3), MBR membrane bioreactor (4), cartridge filter (5), ultra-filtration equipment (6) and reverse osmosis unit (13), it is characterized in that: the coking chemical waste water outlet in described mixed heavy pond (1) links to each other with the import of more medium filter (2), the outlet of described more medium filter (2) links to each other with the waste water input terminus of fluid bed three-dimensional electrode reactor (3), the air input terminus of described fluid bed three-dimensional electrode reactor (3) links to each other with gas blower (7), the waste water output terminal of described fluid bed three-dimensional electrode reactor (3) links to each other with the water-in of MBR membrane bioreactor (4), the aeration opening of described MBR membrane bioreactor (4) links to each other with aeration pump (8), the water outlet of described MBR membrane bioreactor (4) links to each other with the import of cartridge filter (5) by suction pump (9), the outlet of described cartridge filter (5) links to each other with the input aperture of ultra-filtration equipment (6), and the delivery port of described ultra-filtration equipment (6) links to each other with the former water input terminus of reverse osmosis unit (13).
7. three embrane method coking wastewater deep treatment equipment according to claim 6, it is characterized in that: described fluid bed three-dimensional electrode reactor (3) comprises cell body (302), be provided with sealing support frame (307) in the described cell body (302), described sealing support frame (307) middle part is provided with air distribution plate (308), be provided with aerator (309) in the cell body (302) of described air distribution plate (308) below, the air input terminus of described aerator (309) links to each other with gas blower (7); Be provided with water distributor (301) in the cell body (302) of described aerator (309) below, the waste water input terminus of described water distributor (301) links to each other with the outlet of more medium filter (2); Described sealing support frame (307) top is provided with negative electrode (304) and positive electrode (305), be scattered with fluidised granule electrode (303) in described negative electrode (304) and positive electrode (305) cell body (302) on every side, the top waste water output terminal of described cell body (302) is provided be used to the hole plate (306) that prevents that granule electrode (303) from escaping, and described hole plate (306) communicates with the water-in of MBR membrane bioreactor (4).
8. three embrane method coking wastewater deep treatment equipment according to claim 7 is characterized in that: described air distribution plate (308) is 5 ~ 25mm with the spacing of aerator (309), and the qi-emitting hole diameter on the described air distribution plate (308) is 1 ~ 2mm; Ventilating pit diameter on the described aerator (309) is 2 ~ 5mm; Posticum diameter on the described water distributor (301) is 2 ~ 5mm.
9. according to claim 7 or 8 described three embrane method coking wastewater deep treatment equipment, it is characterized in that: described negative electrode (304) and positive electrode (305) are tabular or cylinder-like structure, or the reticulated structure corresponding with above-mentioned shape; It is the coke granule that is coated with metallic compound of 2 ~ 10mm that described granule electrode (303) adopts particle diameter.
10. according to claim 6 or 7 or 8 described three embrane method coking wastewater deep treatment equipment, it is characterized in that: described MBR membrane bioreactor (4) comprises reaction tank body (401), the water-in of described reaction tank body (401) links to each other with the waste water output terminal of fluid bed three-dimensional electrode reactor (3), be set side by side with immersion MBR membrane module (402) in the described reaction tank body (401), the aeration opening of described immersion MBR membrane module (402) links to each other with aeration pump (8), the water outlet of described MBR membrane module (402) links to each other with suction pump (9), and the sewage draining exit of described reaction tank body (401) links to each other with residual sea water pump (403).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112991A (en) * | 2013-01-25 | 2013-05-22 | 深圳力合环保技术有限公司 | Coking wastewater treatment system and coking wastewater treatment method |
| CN104016547A (en) * | 2014-06-19 | 2014-09-03 | 中冶建筑研究总院有限公司 | Advanced treatment and zero emission process for coking wastewater |
| CN104817222A (en) * | 2014-01-31 | 2015-08-05 | 三菱丽阳株式会社 | Waste water treatment method and waste water treatment device |
| CN105271615A (en) * | 2015-10-29 | 2016-01-27 | 长江大学 | Electrochemical composite membrane bioreactor |
| CN108033597A (en) * | 2017-12-15 | 2018-05-15 | 上海电气集团股份有限公司 | A kind of technique using membrane technology processing ammonia nitrogen waste water |
| CN109626677A (en) * | 2019-02-22 | 2019-04-16 | 江苏同瑞环保有限公司 | A kind of advanced treatment process of coking waste water |
| CN110102188A (en) * | 2018-04-27 | 2019-08-09 | 轻工业环境保护研究所 | Concentrated water electrocatalytic oxidation permeates cleaning reverse osmosis/nanofiltration membrane method and device online |
| CN113943089A (en) * | 2021-11-28 | 2022-01-18 | 南华大学 | Wastewater discharge device with multi-stage purification structure for nuclear engineering reservoir |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103112991A (en) * | 2013-01-25 | 2013-05-22 | 深圳力合环保技术有限公司 | Coking wastewater treatment system and coking wastewater treatment method |
| CN103112991B (en) * | 2013-01-25 | 2014-08-20 | 深圳力合环保技术有限公司 | Coking wastewater treatment system and coking wastewater treatment method |
| CN104817222A (en) * | 2014-01-31 | 2015-08-05 | 三菱丽阳株式会社 | Waste water treatment method and waste water treatment device |
| CN104016547A (en) * | 2014-06-19 | 2014-09-03 | 中冶建筑研究总院有限公司 | Advanced treatment and zero emission process for coking wastewater |
| CN104016547B (en) * | 2014-06-19 | 2016-01-20 | 中冶建筑研究总院有限公司 | A kind of coking waste water deep treatment zero-emission process |
| CN105271615A (en) * | 2015-10-29 | 2016-01-27 | 长江大学 | Electrochemical composite membrane bioreactor |
| CN108033597A (en) * | 2017-12-15 | 2018-05-15 | 上海电气集团股份有限公司 | A kind of technique using membrane technology processing ammonia nitrogen waste water |
| CN110102188A (en) * | 2018-04-27 | 2019-08-09 | 轻工业环境保护研究所 | Concentrated water electrocatalytic oxidation permeates cleaning reverse osmosis/nanofiltration membrane method and device online |
| CN109626677A (en) * | 2019-02-22 | 2019-04-16 | 江苏同瑞环保有限公司 | A kind of advanced treatment process of coking waste water |
| CN113943089A (en) * | 2021-11-28 | 2022-01-18 | 南华大学 | Wastewater discharge device with multi-stage purification structure for nuclear engineering reservoir |
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