CN106396258A - Technological method for treating coking wastewater - Google Patents
Technological method for treating coking wastewater Download PDFInfo
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- CN106396258A CN106396258A CN201610864674.5A CN201610864674A CN106396258A CN 106396258 A CN106396258 A CN 106396258A CN 201610864674 A CN201610864674 A CN 201610864674A CN 106396258 A CN106396258 A CN 106396258A
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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
-
- 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
-
- 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
-
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- 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 invention discloses a technological method for treating coking wastewater. The technological method comprises the following steps that (1) coking wastewater is subjected to ammonia distillation and oil-water separation sequentially; (2) coking wastewater after oil-water separation is subjected to water quality regulation; (3) coking wastewater after water quality regulation enters an iron+activated coke reactor for iron-carbon micro-electrolysis and suspended particles in the coking wastewater are absorbed; (4) coking wastewater flowing out of the iron+activated coke reactor is subjected to biological removal of nitrogen and organic pollutant removal treatment; (5) coking wastewater after biochemical treatment is subjected to coagulating sedimentation for mud-water separation; (6) mud after mud-water separation is subjected to thickening and dehydration treatment, and the coking wastewater after mud-water separation is subjected to deep ozonation treatment; the technology operates stably, the cost is low, the treatment efficiency is high, the load capacity resistance is high, and the operation is easy.
Description
Technical field
The present invention relates to a kind of process of Treatment of Wastewater in Coking.
Background technology
Coking chemical waste water is in coke-oven plant's coking, coal gas dry distilling, purification and chemical productss removal process, the height of generation contain phenol,
The high waste water of high ammonia nitrogen, organic concentration, has that biodegradability is poor, toxicity big, the features such as strong to microbial activity inhibitory action.
At present, the technique that the commonly used pretreatment in most existing coke-oven plant is combined with biochemical treatment, pretreatment includes
Ammonia still process, extracting and dephenolizing decyanation etc..Biochemical processing process includes A/O (anoxia/aerobic), A2/ O (anaerobic/anoxic/aerobic) etc..So
And, due to containing multiple refractory organics in coking chemical waste water, lead to the COD in sewage to be difficult to effectively be removed.This
Outward, due to biochemical processing process commonly used be activated sludge process, the method needs longer sludge age that nitrification just can be made thin
Bacterium be enriched with, so will increase structures volume, improve construction cost, if not extended by way of dilatation sludge age and
Hydraulic detention time, will affect the denitrification effect of system.
《Coking chemistry emission of industrial pollutants standard》(GB16171-2012) specify, except the dirty water pollutant of discharge
Outside the standard that reaches requires, unit ton Jiao's displacement not can exceed that 0.4m3.Therefore, also need the coking chemical waste water after biochemical treatment is entered
After row advanced treating, as wet quenching, blast furnace slag flushing, coal yard dust suppression or industrial cycle Water circulation, thus reducing wastewater disposition,
Reduce new water consumption.
Therefore, in order to meet above-mentioned requirements, a kind of disposal ability of exploitation is high, run and construction cost is low, quantity of wastewater effluent
Few technique has become problem demanding prompt solution in Treatment of Coking Effluent industry and water environment protection field.
Content of the invention
For the problems referred to above, the present invention provides one kind reasonable in design, and disposal ability is strong, runs and construction cost is low, sewage
The process of the few Treatment of Wastewater in Coking of discharge capacity, can effectively solve the problem that the difficult problem during Treatment of Coking Effluent and reuse.
For reaching above-mentioned purpose, a kind of process of Treatment of Wastewater in Coking of the present invention, this process includes following step
Suddenly：
(1) coking chemical waste water is carried out successively ammonia still process and oil-water separation；
(2) coking chemical waste water after oil-water separation carries out water quality adjustment；
(3) after water quality adjustment, coking chemical waste water enters ferrum+activated coke reactor, carries out iron-carbon micro-electrolysis and reacts and adsorb Jiao
Change the particle in waste water；
(4) coking chemical waste water of the outflow of ferrum+activated coke reactor is carried out at biological denitrificaion and the removal of organic pollution
Reason；
(5) the coking chemical waste water coagulating sedimentation after biochemical treatment is carried out mud-water separation；
(6) mud after mud-water separation carries out thickening process, and it is smelly that the coking chemical waste water through mud-water separation carries out depth
Oxygen oxidation processes；
The removal of described biological denitrificaion and organic pollution processes and includes：
The water outlet of ferrum+activated coke reactor flows into one-level anaerobic reation pool and is hydrolyzed acidification reaction；
Coking chemical waste water through hydrolysis acidification reaction flows into one-level MBBR Aerobic Pond to carry out nitration reaction and controls nitration reaction
In Nitrification Stage；
Coking chemical waste water through nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, go containing in eliminating water
Nitrogen compound；
Coking chemical waste water through anti-nitration reaction is flowed into two grades of MBBR Aerobic Ponds and synchronizes nitration denitrification reaction, go
Remaining nitrogen-containing compound in eliminating water.
Preferably, there being preparatory process before step 3：By through high temperature sintering and broken activated coke and iron filings or Iron-ore Slag
Mix as filler, described filler is arranged on described ferrum+activated coke reactor, wherein, the particle diameter of described activated coke is 1～
4cm.
Preferably, when the biological denitrificaion of described step (4) and the removal of organic pollution are processed, in described one-level MBBR
Aerobic Pond and two grades of MBBR Aerobic Ponds add portable suspending carrier；Described portable suspending carrier injected volume is one-level MBBR
The 30%～50% of Aerobic Pond pond appearance, is the 20%～30% of two grades of MBBR Aerobic Pond ponds appearances, carrier proportion is 0.97-
0.98kg/m3, more than 90%, specific surface area is more than 500m to porosity2/m3；And carry out Air Exposure.
Preferably, described step (6) depth ozone Oxidation Treatment includes：Add catalyst filling, described catalyst filling
It is more than 200m for surface area2/m3And the aluminium oxide of supported copper, ferrum, manganese or nickel or haydite；Filler dosage is reactor volume
50%～60%, and using air as ozone occurring source, the oxidation operation of difficult for biological degradation is become small organic molecule or nothing
Machine thing.
Preferably, being additionally provided with reflow step after step (5)：A mud part for mud-water separation is back to one-level anaerobism
Reaction tank, reflux ratio is 50～100%.
Heavy oil and light oil can be separated from coking chemical waste water by the present invention effectively, realize Oil Recovery；Ferrum+activity
Burnt reactor can carry out light electrolysis effect to coking chemical waste water, improve the biodegradability of coking chemical waste water, and activated coke can be right
Float plays adsorption；Two-stage anaerobic+MBBR aerobic reaction system mainly carries out denitrogenation processing to sewage, organic dirt of degrading
Dye thing concentration, and MBBR aerobic reaction tank can extend sludge age, solidification and abundant microbe species, improves the nitrification of system
Performance and anti-load-bearing capacity；Finally, after sewage entrance ozone oxidation system after precipitation carries out advanced treating, can be used as circulating
Water uses；The present invention is stable, low cost, and treatment effeciency is high, and anti-load-bearing capacity is strong, simple to operate.
Brief description
Fig. 1 is coking waste water treatment process flow chart of the present invention.
Specific embodiment
With reference to Figure of description, the present invention will be further described.
Embodiment 1
A kind of process of Treatment of Wastewater in Coking of the present embodiment, this process comprises the following steps：
(1) coking chemical waste water is carried out ammonia still process processes and sequentially enter oil interceptor and flotation tank carries out oil-water separation；
(2) the coking chemical waste water entrance regulating reservoir after oil-water separation carries out water quality adjustment；
(3) after water quality adjustment, coking chemical waste water enters ferrum+activated coke reactor, carries out iron-carbon micro-electrolysis and reacts and adsorb Jiao
Change the particle in waste water；
(4) the coking chemical waste water entrance biochemical treatment system of the outflow of ferrum+activated coke reactor is carried out biological denitrificaion and have
The removal of organic pollutants is processed；
(5) coking chemical waste water after biochemical treatment is entered second pond and coagulative precipitation tank carries out coagulating sedimentation and muddy water divides
From；
(6) mud after mud-water separation carries out thickening process, and the coking chemical waste water through mud-water separation enters ozone oxygen
Change system carries out depth ozone Oxidation Treatment；
The removal of described biological denitrificaion and organic pollution processes and includes：
The water outlet of ferrum+activated coke reactor flows into one-level anaerobic reation pool and is hydrolyzed acidification reaction；
Coking chemical waste water through hydrolysis acidification reaction flows into one-level MBBR Aerobic Pond to carry out nitration reaction and controls nitration reaction
In Nitrification Stage；
Coking chemical waste water through nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, go containing in eliminating water
Nitrogen compound；
Coking chemical waste water through anti-nitration reaction is flowed into two grades of MBBR Aerobic Ponds and synchronizes nitration denitrification reaction, go
Remaining nitrogen-containing compound in eliminating water.
The present embodiment realizes Oil Recovery；Ferrum+activated coke reactor can carry out light electrolysis effect to coking chemical waste water, improves
The biodegradability of coking chemical waste water, and activated coke can play adsorption to float；Two-stage anaerobic+MBBR aerobic reaction system
System mainly carries out denitrogenation processing to sewage, degradable organic pollutant concentration, and MBBR aerobic reaction tank can extend sludge age,
Solidification and abundant microbe species, improve the Nitrification of system and anti-load-bearing capacity；Finally, sewage entrance after precipitation is smelly
After oxygen oxidative system carries out advanced treating, can be used as recirculated water and use, cost is relatively low, effectively reduces coked waste water discharge capacity.
Embodiment 2
Based on above-described embodiment, the present embodiment has preparatory process before step 3：By through high temperature sintering and broken activity
Jiao is mixed as filler with iron filings or Iron-ore Slag, and described filler is arranged on described ferrum+activated coke reactor, wherein, described work
Property burnt particle diameter be 1～4cm, and carry out Air Exposure；
Carry out aeration in ferrum+activated coke reactor, on the one hand, Fe2+The Fe of oxidized generation3+Gradually hydrolysis generates and gathers
Right big Fe (OH)3Colloid flocculant, the pollutant that can effectively adsorb, condense in water, thus strengthen net to waste water
Change effect.On the other hand, after micro-electrolysis reaction, hardly degraded organic substance open loop chain rupture can form simple organic by micro- life
Thing is utilized.Ferrum+activated coke (carbon) passes through aerated reaction, can consume substantial amounts of hydrion, so that the pH value of waste water is raised, so
The dosage of alkali required for follow-up nitration reaction can be reduced.
The present embodiment is simple to operate, reduces cost, and the pollutant in also effective coked waste water, enhance to waste water simultaneously
Detergent power.
Embodiment 3
Based on above-described embodiment, when the biological denitrificaion of described step (4) and the removal of organic pollution are processed, described
One-level MBBR Aerobic Pond and two grades of MBBR Aerobic Ponds add portable suspending carrier；Described portable suspending carrier injected volume is
The 30%～50% of one-level MBBR Aerobic Pond pond appearance, is the 20%～30% of two grades of MBBR Aerobic Pond ponds appearances, and carrier proportion is
0.97-0.98kg/m3, more than 90%, specific surface area is more than 500m to porosity2/m3；And carry out Air Exposure.
The present embodiment, by way of adding portable floating stuffing, is enriched with more nitrite bacterias, and by pH
The isoparametric control of value, dissolved oxygen, temperature, realizes short distance nitration.It is not only able to shorten nitrifying process, the construction of minimizing structures
Cost, and aeration energy consumption can be reduced, save operating cost.
Embodiment 4
Based on above-described embodiment, described in the present embodiment, step (6) depth ozone Oxidation Treatment includes：By ultraviolet or
Electrolysis prepares ozone using air as occurring source, and described ozone is more than 200m through specific surface area2/m3And supported copper, ferrum, manganese or
The aluminium oxide of nickel or the catalyst of haydite, the oxidation operation of difficult for biological degradation in coking chemical waste water is become small organic molecule
Or inorganic matters.
It is additionally provided with reflow step after step (5)：A mud part for mud-water separation is back to one-level anaerobic reation pool,
Reflux ratio is 50～100%；Sludge reflux ensures the microbial biomass having abundance in biochemical treatment system.
Secondary clarifier effluent enters ozone oxidation system and the oxidation operation of difficult for biological degradation is become with small organic molecule or nothing
Machine thing, the waste water obtaining, after ozone layer destroying process, makes as wet quenching, blast furnace slag flushing, coal yard dust suppression or industrial circulating water
With；Mud after concentrated pass through sludge pump, send into sludge dewatering between carry out sludge dewatering, the mud after dehydration send outside landfill or
Burn.
More than, only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any it is familiar with basis
Those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.
Claims (6)
1. a kind of process of Treatment of Wastewater in Coking it is characterised in that：This process comprises the following steps：：
(1) coking chemical waste water is carried out successively ammonia still process and oil-water separation；
(2) coking chemical waste water after oil-water separation carries out water quality adjustment；
(3) after water quality adjustment coking chemical waste water enter ferrum+activated coke reactor, carry out iron-carbon micro-electrolysis react and adsorb coking give up
Particle in water；
(4) coking chemical waste water of the outflow of ferrum+activated coke reactor is carried out biological denitrificaion and the removal of organic pollution is processed；
(5) the coking chemical waste water coagulating sedimentation after biochemical treatment is carried out mud-water separation；
(6) mud after mud-water separation carries out thickening process, and the coking chemical waste water through mud-water separation carries out depth ozone oxygen
Change is processed；
The removal of described biological denitrificaion and organic pollution processes and includes：
The water outlet of ferrum+activated coke reactor flows into one-level anaerobic reation pool and is hydrolyzed acidification reaction；
Coking chemical waste water through hydrolysis acidification reaction flows into one-level MBBR Aerobic Pond to carry out nitration reaction and controls nitration reaction in Asia
The nitrification stage；
Coking chemical waste water through nitration reaction is flowed into secondary anaerobic reaction tank and carries out anti-nitration reaction, go the nitrogen in eliminating water
Compound；
Coking chemical waste water through anti-nitration reaction is flowed into two grades of MBBR Aerobic Ponds and synchronizes nitration denitrification reaction, go eliminating water
In remaining nitrogen-containing compound.
2. according to claim 1 a kind of process of Treatment of Wastewater in Coking it is characterised in that：There is standard before step 3
Standby operation：Using through high temperature sintering and broken activated coke is mixed as filler with iron filings or Iron-ore Slag, described filler is arranged on
Described ferrum+activated coke reactor, wherein, the particle diameter of described activated coke is 1～4cm.
3. according to claim 1 a kind of process of Treatment of Wastewater in Coking it is characterised in that：In described step (4)
When the removal of biological denitrificaion and organic pollution is processed, add carrier in described one-level MBBR Aerobic Pond and two grades of MBBR Aerobic Ponds
Proportion is 0.97-0.98kg/m3, more than 90%, specific surface area is more than 500m to porosity2/m3Portable suspending carrier；And
Air Exposure is carried out to described one-level MBBR Aerobic Pond and described two grades of MBBR Aerobic Ponds.
4. according to claim 1 a kind of process of Treatment of Wastewater in Coking it is characterised in that：In described step (4)
When the removal of biological denitrificaion and organic pollution is processed, described one-level MBBR Aerobic Pond water temperature also to be controlled to be 27～32 DEG C, pH
For 7.8～8.3, dissolved oxygen is 3～4mg/L；Described two grades of MBBR Aerobic Pond water temperatures are controlled to be 20～25 DEG C, dissolved oxygen is 1.5
～2.0mg/L, pH value is 7.5～7.8.
5. according to claim 1 a kind of process of Treatment of Wastewater in Coking it is characterised in that：Described step (6) depth
Ozone Oxidation Treatment includes preparing ozone using air as occurring source by ultraviolet or electrolysis, and described ozone is through catalyst
The oxidation operation of difficult for biological degradation in coking chemical waste water is become small organic molecule or inorganic matters by catalysis.
6. according to claim 1 a kind of process of Treatment of Wastewater in Coking it is characterised in that：After step (5) also
It is provided with reflow step：A mud part for mud-water separation is back to one-level anaerobic reation pool, and reflux ratio is 50～100%.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN108059304A (en) * | 2017-12-24 | 2018-05-22 | 苏州市海魄洁净环境工程有限公司 | Constant-temperature water supply device |
| CN109607704A (en) * | 2019-01-31 | 2019-04-12 | 内蒙古科技大学 | Using rare-earth tailing as multiple catalyzing iron carbon microelectrode filler of raw material and the preparation method and application thereof |
| CN110563242A (en) * | 2018-06-05 | 2019-12-13 | 达斯玛特科技（杭州）有限公司 | caffeine wastewater treatment process |
| CN114573160A (en) * | 2020-11-30 | 2022-06-03 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108059304A (en) * | 2017-12-24 | 2018-05-22 | 苏州市海魄洁净环境工程有限公司 | Constant-temperature water supply device |
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| CN110563242A (en) * | 2018-06-05 | 2019-12-13 | 达斯玛特科技（杭州）有限公司 | caffeine wastewater treatment process |
| CN110563242B (en) * | 2018-06-05 | 2022-03-25 | 浙江迈沃加科技有限公司 | Caffeine wastewater treatment process |
| CN109607704A (en) * | 2019-01-31 | 2019-04-12 | 内蒙古科技大学 | Using rare-earth tailing as multiple catalyzing iron carbon microelectrode filler of raw material and the preparation method and application thereof |
| CN114573160A (en) * | 2020-11-30 | 2022-06-03 | 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 |
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