CN106396258B - Handle the process of coking wastewater - Google Patents
Handle the process of coking wastewater Download PDFInfo
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- CN106396258B CN106396258B CN201610864674.5A CN201610864674A CN106396258B CN 106396258 B CN106396258 B CN 106396258B CN 201610864674 A CN201610864674 A CN 201610864674A CN 106396258 B CN106396258 B CN 106396258B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The present invention discloses a kind of process for handling coking wastewater, and the process is the following steps are included: coking wastewater is successively carried out ammonia still process and water-oil separating by (1)；(2) coking wastewater after water-oil separating carries out water quality adjustment；(3) coking wastewater enters iron+activated coke reactor after water quality adjustment, carries out iron-carbon micro-electrolysis reaction and adsorbs the suspended particulate in coking wastewater；(4) removal that the coking wastewater of iron+activated coke reactor outflow carries out biological denitrificaion and organic pollutant is handled；(5) the coking wastewater coagulating sedimentation after biochemical treatment is subjected to mud-water separation；(6) sludge after mud-water separation carries out thickening processing, and the coking wastewater through mud-water separation carries out depth ozone Oxidation Treatment；This process runs well, at low cost, treatment effeciency is high, and anti-load-bearing capacity is strong, easy to operate.
Description
Technical field
The present invention relates to a kind of processes for handling coking wastewater.
Background technique
Coking wastewater is in coke-oven plant's coking, coal gas destructive distillation, purification and chemical products removal process, the height of generation containing phenol,
The high waste water of high ammonia nitrogen, organic concentration has the features such as biodegradability is poor, toxicity is big, strong to microbial activity inhibiting effect.
Currently, most existing coke-oven plants generally use technique of the pretreatment in conjunction with biochemical treatment, pretreatment includes
Ammonia still process, extracting and dephenolizing decyanation etc..Biochemical processing process includes A/O (anoxic/aerobic), A2/ O (anaerobic/anoxic/aerobic) etc..So
And due to, containing there are many refractory organic, the COD in sewage being caused to be difficult to be effectively removed in coking wastewater.This
Outside, what is generallyd use due to biochemical processing process is activated sludge process, and this method needs longer sludge age that can just make nitrification thin
Bacterium enrichment, will increase the volume of structures in this way, improve construction cost, if extend not by way of dilatation sludge age and
Hydraulic detention time just will affect the denitrification effect of system.
" coking chemistry emission of industrial pollutants standard " (GB16171-2012) regulation, in addition to the dirty water pollutant of discharge
Reach outside standard requirements, unit ton coke displacement is no more than 0.4m3.Therefore, also need to the coking wastewater after biochemical treatment into
After row advanced treating, as wet quenching, blast furnace slag flushing, coal yard dust suppression or industrial circulating water reuse, so that wastewater disposition is reduced,
Reduce new water consumption.
Therefore, in order to meet above-mentioned requirements, develop that a kind of processing capacity is high, runs, quantity of wastewater effluent low with construction cost
Few technique has become urgent problem to be solved in Treatment of Coking Effluent industry and water environment protection field.
Summary of the invention
In view of the above-mentioned problems, the present invention provides, a kind of design is reasonable, and processing capacity is strong, runs, sewage low with construction cost
The process of the few processing coking wastewater of discharge amount, can effectively solve the problem that the problem during Treatment of Coking Effluent and reuse.
In order to achieve the above objectives, a kind of process for handling coking wastewater of the present invention, which includes following step
It is rapid:
(1) coking wastewater is successively subjected to ammonia still process and water-oil separating；
(2) coking wastewater after water-oil separating carries out water quality adjustment；
(3) coking wastewater enters iron+activated coke reactor after water quality adjustment, carries out iron-carbon micro-electrolysis reaction and adsorbs coke
Change the suspended particulate in waste water；
(4) at the removal that the coking wastewater of iron+activated coke reactor outflow is carried out to biological denitrificaion and organic pollutant
Reason；
(5) the coking wastewater coagulating sedimentation after biochemical treatment is subjected to mud-water separation；
(6) sludge after mud-water separation carries out thickening processing, and it is smelly that the coking wastewater through mud-water separation carries out depth
Oxygen oxidation processes；
The removal of the biological denitrificaion and organic pollutant is handled
The water outlet of iron+activated coke reactor flows into level-one anaerobic reation pool and acidification reaction is hydrolyzed；
Coking wastewater through hydrolysis acidification reaction flows into level-one MBBR aerobic tank and carries out nitration reaction and control nitration reaction
In Nitrification Stage；
Coking wastewater Jing Guo nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, goes containing in water removal
Nitrogen compound；
Nitration denitrification reaction is synchronized by second level MBBR aerobic tank is flowed by the coking wastewater of anti-nitration reaction, is gone
Remaining nitrogenous compound in water removal.
Preferably, having preparatory process before the step (3): will be through high temperature sintering and broken activated coke and iron filings or iron
Slag, which mixes, is used as filler, and the filler is arranged in the iron+activated coke reactor, wherein the partial size of the activated coke is 1
~4cm.
Preferably, when the removal of the biological denitrificaion and organic pollutant of the step (4) is handled, in the level-one MBBR
Aerobic tank and second level MBBR aerobic tank add mobile suspending carrier；The mobile suspending carrier injected volume is level-one MBBR
The 30%~50% of aerobic tank pool capacity, is the 20%~30% of second level MBBR aerobic tank pool capacity, and carrier specific gravity is 0.97-
0.98kg/m3, for porosity 90% or more, specific surface area is greater than 500 m2/m3；And carry out Air Exposure.
Preferably, step (6) the depth ozone Oxidation Treatment includes: addition catalyst filling, the catalyst filling
It is greater than 200m for surface area2/m3And supported copper, iron, manganese or nickel aluminium oxide or haydite；Filler dosage is reactor volume
50%~60%, and using air as ozone occurring source, by the oxidation operation of difficult for biological degradation at small organic molecule or nothing
Machine object.
Preferably, being additionally provided with reflow step after step (5): sludge a part of mud-water separation is back to level-one anaerobism
Reaction tank, reflux ratio are 50~100%.
The present invention can effectively separate heavy oil and light oil from coking wastewater, realize Oil Recovery；Iron+activity
Burnt reactor can carry out light electrolysis effect to coking wastewater, improve the biodegradability of coking wastewater, and activated coke can be right
Suspended matter plays suction-operated；Two-stage anaerobic+MBBR aerobic reaction system mainly carries out denitrogenation processing, organic dirt of degrading to sewage
Object concentration is contaminated, and MBBR aerobic reaction tank is able to extend sludge age, solidification and abundant microbe species, improves the nitrification of system
Performance and anti-load-bearing capacity；Finally, can be used as recycling after sewage after precipitation enters ozone oxidation system progress advanced treating
Water uses；The present invention is stable, at low cost, and treatment effeciency is high, and anti-load-bearing capacity is strong, easy to operate.
Detailed description of the invention
Fig. 1 is coking waste water treatment process flow chart of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings of the specification.
Embodiment 1
The present embodiment it is a kind of handle coking wastewater process, the process the following steps are included:
(1) coking wastewater is subjected to ammonia still process processing and sequentially enters oil separator and flotation tank progress water-oil separating；
(2) coking wastewater after water-oil separating enters conditioning tank progress water quality adjustment；
(3) coking wastewater enters iron+activated coke reactor after water quality adjustment, carries out iron-carbon micro-electrolysis reaction and adsorbs coke
Change the suspended particulate in waste water；
(4) coking wastewater of iron+activated coke reactor outflow is entered into biochemical treatment system progress biological denitrificaion and had
The removal of machine pollutant is handled；
(5) coking wastewater after biochemical treatment is entered into secondary settling tank and coagulative precipitation tank carries out coagulating sedimentation and muddy water point
From；
(6) sludge after mud-water separation carries out thickening processing, and the coking wastewater through mud-water separation enters ozone oxygen
Change system carries out depth ozone Oxidation Treatment；
The removal of the biological denitrificaion and organic pollutant is handled
The water outlet of iron+activated coke reactor flows into level-one anaerobic reation pool and acidification reaction is hydrolyzed；
Coking wastewater through hydrolysis acidification reaction flows into level-one MBBR aerobic tank and carries out nitration reaction and control nitration reaction
In Nitrification Stage；
Coking wastewater Jing Guo nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, goes containing in water removal
Nitrogen compound；
Nitration denitrification reaction is synchronized by second level MBBR aerobic tank is flowed by the coking wastewater of anti-nitration reaction, is gone
Remaining nitrogenous compound in water removal.
The present embodiment realizes Oil Recovery；Iron+activated coke reactor can carry out light electrolysis effect to coking wastewater, improve
The biodegradability of coking wastewater, and activated coke can play suction-operated to suspended matter；Two-stage anaerobic+MBBR aerobic reaction system
System mainly to sewage carry out denitrogenation processing, degradable organic pollutant concentration, and MBBR aerobic reaction tank be able to extend sludge age,
Solidification and abundant microbe species, improve system Nitrification and anti-load-bearing capacity；Finally, sewage after precipitation enter it is smelly
After oxygen oxidative system carries out advanced treating, it can be used as recirculated water use, cost is relatively low, effectively reduces coked waste water discharge amount.
Embodiment 2
Based on the above embodiment, the present embodiment has preparatory process before the step (3): will be through high temperature sintering and broken
Activated coke and iron filings or Iron-ore Slag, which mix, is used as filler, the filler is arranged in the iron+activated coke reactor, wherein institute
The partial size for stating activated coke is 1~4cm, and carries out Air Exposure；
It is aerated in iron+activated coke reactor, on the one hand, Fe2+It is oxidized the Fe of generation3+Gradually hydrolysis generates poly-
Right big Fe (OH)3Colloid flocculant can be adsorbed effectively, agglomerate pollutant in water, so that enhancing is to the net of waste water
Change effect.On the other hand, after micro-electrolysis reaction, hardly degraded organic substance can open loop chain rupture formed simple organic by micro- life
Object is utilized.Iron+activated coke (carbon) can consume a large amount of hydrogen ion, increase the pH value of waste water, in this way by aeration reaction
The dosage of alkali required for subsequent nitration reaction can be reduced.
The present embodiment is easy to operate, reduces cost, while the pollutant in also effective coked waste water, enhances to waste water
Detergent power.
Embodiment 3
Based on the above embodiment, in the removal processing of the biological denitrificaion of the step (4) and organic pollutant, described
Level-one MBBR aerobic tank and second level MBBR aerobic tank add mobile suspending carrier；The mobile suspending carrier injected volume is
The 30%~50% of level-one MBBR aerobic tank pool capacity, is the 20%~30% of second level MBBR aerobic tank pool capacity, and carrier specific gravity is
0.97-0.98kg/m3, for porosity 90% or more, specific surface area is greater than 500m2/m3；And carry out Air Exposure.
The present embodiment is enriched with more nitrite bacterias by way of adding mobile floating stuffing, and by pH
Short distance nitration is realized in the control of the parameters such as value, dissolved oxygen, temperature.It is not only able to the construction shortened nitrifying process, reduce structures
Cost, and can reduce aeration energy consumption, save operating cost.
Embodiment 4
Based on the above embodiment, step described in the present embodiment (6) depth ozone Oxidation Treatment include: by ultraviolet light or
Electrolysis method prepares ozone using air as occurring source, and the ozone is greater than 200 m through specific surface area2/m3And supported copper, iron, manganese or
The aluminium oxide of nickel or the catalyst of haydite, by the oxidation operation of difficult for biological degradation in coking wastewater at small organic molecule
Or inorganic matter.
Be additionally provided with reflow step after step (5): sludge a part of mud-water separation is back to level-one anaerobic reation pool,
Reflux ratio is 50~100%；Sludge reflux guarantees the microbial biomass for having sufficient in biochemical treatment system.
Secondary clarifier effluent enters ozone oxidation system to the oxidation operation of difficult for biological degradation into small organic molecule or nothing
Machine object, obtained waste water make after ozone layer destroying is handled as wet quenching, blast furnace slag flushing, coal yard dust suppression or industrial circulating water
With；Sludge after concentrated is sent between sludge dewatering and carries out sludge dewatering by sludge pump, dewatered sludge send outside landfill or
It burns.
More than, only presently preferred embodiments of the present invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with sheet
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.Therefore, the scope of protection of the present invention shall be subject to the scope of protection defined by the claims.
Claims (6)
1. it is a kind of handle coking wastewater process, it is characterised in that: the process the following steps are included:
(1) coking wastewater is successively subjected to ammonia still process and water-oil separating；
(2) coking wastewater after water-oil separating carries out water quality adjustment；
(3) coking wastewater enters iron+activated coke reactor after water quality adjustment, carries out iron-carbon micro-electrolysis reaction and adsorb coking to give up
Suspended particulate in water；
(4) removal that the coking wastewater of iron+activated coke reactor outflow carries out biological denitrificaion and organic pollutant is handled；
(5) the coking wastewater coagulating sedimentation after biochemical treatment is subjected to mud-water separation；
(6) sludge after mud-water separation carries out thickening processing, and the coking wastewater through mud-water separation carries out depth ozone oxygen
Change processing；
The removal of the biological denitrificaion and organic pollutant is handled
The water outlet of iron+activated coke reactor flows into level-one anaerobic reation pool and acidification reaction is hydrolyzed；
Coking wastewater through hydrolysis acidification reaction flows into level-one MBBR aerobic tank and carries out nitration reaction and control nitration reaction in Asia
The nitrification stage；
Coking wastewater Jing Guo nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, goes the nitrogen in water removal
Close object；
Nitration denitrification reaction is synchronized by second level MBBR aerobic tank is flowed by the coking wastewater of anti-nitration reaction, goes to remove water
In remaining nitrogenous compound.
2. a kind of process for handling coking wastewater according to claim 1, it is characterised in that: have before step (3)
Preparatory process: by through high temperature sintering and broken activated coke and iron filings or Iron-ore Slag mix and be used as filler, the filler is arranged
In the iron+activated coke reactor, wherein the partial size of the activated coke is 1~4cm.
3. a kind of process for handling coking wastewater according to claim 1, it is characterised in that: in the step (4)
When the removal processing of biological denitrificaion and organic pollutant, carrier is added in the level-one MBBR aerobic tank and second level MBBR aerobic tank
Specific gravity is 0.97-0.98kg/m3, porosity 90% or more, specific surface area be greater than 500m2/m3Mobile suspending carrier；
And Air Exposure is carried out to the level-one MBBR aerobic tank and the second level MBBR aerobic tank.
4. a kind of process for handling coking wastewater according to claim 1, it is characterised in that: in the step (4)
When the removal processing of biological denitrificaion and organic pollutant, also to control the level-one MBBR aerobic tank water temperature is 27~32 DEG C, pH
It is 7.8~8.3, dissolved oxygen is 3~4mg/L；Controlling the second level MBBR aerobic tank water temperature is 20~25 DEG C, dissolved oxygen 1.5
~2.0mg/L, pH value are 7.5~7.8.
5. a kind of process for handling coking wastewater according to claim 1, it is characterised in that: step (6) depth
Ozone Oxidation Treatment includes that ozone is prepared using air as occurring source by ultraviolet light or electrolysis method, and the ozone is through catalyst
Catalysis is by the oxidation operation of difficult for biological degradation in coking wastewater at small organic molecule or inorganic matter.
6. a kind of process for handling coking wastewater according to claim 1, it is characterised in that: after step (5) also
Equipped with reflow step: sludge a part of mud-water separation is back to level-one anaerobic reation pool, and reflux ratio is 50~100%.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107522354A (en) * | 2017-08-23 | 2017-12-29 | 萍乡市华星化工设备填料有限公司 | High-efficiency coking wastewater comprehensive treatment method |
| CN107445413A (en) * | 2017-09-22 | 2017-12-08 | 萍乡市华星化工设备填料有限公司 | A kind of method that comprehensive high-efficiency administers coking chemical waste water |
| CN107487949A (en) * | 2017-09-22 | 2017-12-19 | 萍乡市华星化工设备填料有限公司 | The system that a kind of comprehensive high-efficiency administers coking chemical waste water |
| CN108059304B (en) * | 2017-12-24 | 2021-04-02 | 苏州市海魄洁净环境工程有限公司 | Constant temperature water supply device |
| CN110563242B (en) * | 2018-06-05 | 2022-03-25 | 浙江迈沃加科技有限公司 | Caffeine wastewater treatment process |
| CN109607704B (en) * | 2019-01-31 | 2021-12-14 | 内蒙古科技大学 | Multi-component catalytic iron-carbon microelectrode filler using rare earth tailings as raw material and its preparation method and application |
| CN114573160B (en) * | 2020-11-30 | 2024-09-24 | 中国石油化工股份有限公司 | Treatment and recycling method of cold coke wastewater |
| CN114590974A (en) * | 2022-04-02 | 2022-06-07 | 詹长贵 | Coking wastewater advanced treatment process |
| CN116022890A (en) * | 2022-09-30 | 2023-04-28 | 中冶南方都市环保工程技术股份有限公司 | B, F-Ti/TiO 2 NTs@PbO 2 Anode, preparation method thereof and application thereof in coking wastewater |
| CN116282538A (en) * | 2023-03-07 | 2023-06-23 | 山东钢铁股份有限公司 | Rapid recovery method for abnormal operation of biochemical section of coking wastewater treatment A2O process |
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Effective date of registration: 20220610 Address after: 243000 Fu Chang Industrial Park, 259 HSI Nan Road, Ma'anshan economic and Technological Development Zone, Anhui Patentee after: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee after: MCC Huatian Nanjing Engineering Technology Co., Ltd Address before: 243005 Hunan West Road, Ma'anshan, Ma'anshan, Anhui Patentee before: HUATIAN ENGINEERING & TECHNOLOGY CORPORATION, MCC Patentee before: MCC Huatian (Anhui) energy conservation and Environmental Protection Research Institute Co., Ltd |