CN106007091A - Treatment method for oily sewage - Google Patents
Treatment method for oily sewage Download PDFInfo
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- CN106007091A CN106007091A CN201610544254.9A CN201610544254A CN106007091A CN 106007091 A CN106007091 A CN 106007091A CN 201610544254 A CN201610544254 A CN 201610544254A CN 106007091 A CN106007091 A CN 106007091A
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- sewage
- ozone
- water
- oil
- aeration tank
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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
- C02F1/28—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
- C02F1/52—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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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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- 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)
Abstract
The invention discloses a treatment method for oily sewage. The treatment method includes the steps that the sewage is collected and contained in a sewage tank, after layering, oil slick, sewage and impurities heavier than the sewage are discharged in layers and collected, the collected sewage enters a closed oil-water separator, the oil and the sewage are separated, and the sewage obtained after separation is treated through an ozone integrated treatment method to obtain water meeting the drainage standard. In the ozone integrated treatment method, the sewage is sequentially put into a flocculation aeration tank, a settling tank and an adsorption aeration tank to be treated, and flocculation oxidization, static settling and adsorption reoxidation are carried out on the sewage. The treatment method has the advantages of being simple in process, low in cost, easy to operate, high in working efficiency and free of secondary products, the number of accessory equipment is small, the operation environment is clean and comfortable, operation time is greatly shortened, and little sludge is generated.
Description
Technical field
The invention belongs to technical field of sewage, especially relate to the processing method of a kind of oil-polluted water.
Background technology
The petrochemical industry class oil-polluted water that oiling product storage and transportation process produces, all the components of existing oil, comprise again man-made additive and seawater flushing water.Containing oils, hydro carbons, phenols, three sulphur classes, float colloidal type, mushroom, ammonia nitrogen sulfur phosphorus, metal class etc., pollutant are the most but also close, it is difficult to degraded；Salinity is high, toxicity is big, it is difficult to biochemical treatment.
Now widely used processing method is to use combined method, i.e. Mechanical Method air-dissolved backflow floatation bioanalysis sedimentation method two-stage tandem combination Filtration sterilization discharge, in recent years, ozone is used to sewage disposal, and representational combined method is: Mechanical Method secondary floatation method Fenton reagent Catalyzed by Ultrasonic Wave ozonization method activated carbon catalysis ozonization method industrial membrane facture sewage effluent.These Combination of Methods, while it seem that difference, are of virtually and communicate part, are all by using multiple treating method to combine, using super many unit to be combined, reduce pollutant load and pollutant kind step by step.Such as, first can realize oil removal by Mechanical Method, after isolating oil slick, sewage reaches in air-floating apparatus by water pump, by molten gas dosing, separating suspension and less oil molecule, purifies water.In order to reach the effect of anticipation, air supporting water outlet is repeated flotation, the method for use, such as: repeat flotation, the secondary flotation of two-stage tandem with looping back water pump.Oil removal rate is up to 70 ~ 80%.Combine Ozonation or bioanalysis deeply treating wastewater afterwards, to reduce COD content.Reduce organic pollution content step by step, up to standard in order to conscientiously realize COD, it is also possible to use fine filtering method, absorption etc..In a word, pollutant removal is followed and is first removed the order removing less molecule compared with macromole again, and one or several Organic substances that each unit is removed, so by the prolongation of technological process, the accumulation realizing clearance is up to standard.As the final step before discharge, it is common to use hypochlorous acid, as oxidant, kills the intrasystem microorganism that exceeds standard.Industrial membrane facture embodies the requirement having reuse to oil-polluted water.
It is applied in combination it is known that plant technical method too much, has even had the suspicion of accumulation.Pollutants removal rate is decomposed in system unit step by step, this is that old technology flow process has the method stylized, the accumulation of method, flow process is drawn more and more longer, technique becomes increasingly complex, and cost is more and more higher, as a example by above two method: the lengthening of flow process, the most do not bring expected effect, on the contrary inefficiency.Such as: in process, air supporting seems essential, relies on air supporting to form a connecting link, and makes the rough oil removal of technique front end, and the sewage of low concentration depths reason of technique back segment, is mutually linked.The treatment effect of whole technique is decided by pneumatically supported flotation effect.And flotation technology, it is not competent such status, has dragged slowly system, particularly make the advance of ozone technology all be difficult to display, reason is the defect that this technology of air supporting itself is old: one is simple physical separating process, waste water COD clearance after it processes is only 20 ~ 40%, and the oil molecule existed makes the dross adherence of generation by force, and dark greasy filth sticks on container inner wall, it is difficult to remove, equipment is dirty, and water outlet is poor, and the effect repeating flotation is the most little；Two be major part flocculate, bubbles entrain to be leaned on up go out the water surface, infiltrate unavoidably in outlet pipe in up, with water flow into next stage unit；Three is that the dosing of medicament is many, and optional equipment is many, air compressor machine, high pressure air dissolved pump, circulating pump, dissolving, and the equipment of two-stage tandem is the most more.So causing operating cost high, water outlet inefficient, become the bottleneck of system for restricting.
These defect problems of air supporting itself, disconnect mutually with the actual treatment efficiency of follow-up unit.Can not control in relatively low qualified scope going out water pollution degree, make the load that follow-up operation unit is carried, all beyond its normal duty scope.Even result in technology processing system and be in collapse.The energy qualified discharge up to standard of whole nation oily waste water treatment at present, still less than 50 percent.
Summary of the invention
It is an object of the invention to improve the deficiency of prior art and provide that a kind of flow process is simple, auxiliary device is few, low cost, simple to operate, running environment Clean and comfortable, the operation time greatly reduces, work efficiency is high, it is few to produce mud, without the processing method of oil-polluted water of secondary product.
The object of the present invention is achieved like this, a kind of processing method of oil-polluted water, it is characterized in that the method is will to place in sewage collecting to Water Tank, after being layered, by oil slick, sewage and discharging collection than the impurity layering of sewage weight, the sewage of collection enters closed oil water separator, oil, water is separated, sewage after separation uses ozone integral treatment method to process, and must reach the water of discharge standard；
Described ozone integral treatment method be sewage is sequentially placed into coacervation Aeration tank, sedimentation tank, absorption Aeration tank process, and sewage carry out flocculation oxidation, quiescent setting, absorption reoxidize.
In order to realize the purpose of the present invention further, the ozone integral treatment method that can be described comprises the following steps:
Sewage after a, separation puts into coacervation Aeration tank by water inlet pipe, water pipe, air inlet pipe and evacuated tube is tapped into bottom coacervation Aeration tank, chemical feed pipe is connected on water inlet pipe, chemicals dosing plant adds flocculation agent by the chemical feed pipe connected with water inlet pipe, ozone generator arrives air inlet pipe by pipelined ozone, air inlet pipe end connects rotary cutting aerator, use is scraped foam plate and the foam of generation is scraped row's foam mouth and collects in floating oil collecting pond, adding anti-foam agent to process, the sewage in coacervation Aeration tank enters sedimentation tank by drain pipe；Very small amount coacervation thing is periodically discharged by evacuated tube；
B, the sewage of entrance sedimentation tank precipitate, after coagulation thing precipitation, and static concentration, fall in mud-collecting slot, after being separated by perforated sludge discharge pipe, enter collecting pit, sewage is entered absorption Aeration tank by drain pipe；
C, the sewage of entrance absorption Aeration tank, use active carbon fiber felt adsorption treatment and the ozonation aerated process of micro-hole aerator, and micro-hole aerator is connected with ozone generator by pipeline, after reaching discharge standard, directly discharges after process.
In order to realize the purpose of the present invention further, can be that described flocculation agent uses PAFC, by chemicals dosing plant proportioning solution, solution concentration 1-5%, adding flocculation agent PAFC is every liter of sewage 14-24 milligram, ozone generator arrives air inlet pipe by pipelined ozone, and air inlet pipe end connects multiple rotary cutting aerator by gas-distributing pipe.
In order to realize the purpose of the present invention further, can be that in described absorption Aeration tank, ozone dosage is 6-10mg/L, in water, Residual ozone concentration uses 0.2～0.4mg/L.
Compared with the prior art the present invention has following distinguishing feature and good effect: the inventive method does not use air supporting, but after oil removal, directly carry out ozone integral system, advanced treating, ozone assembled unit includes three cuboid ponds, it is connected with each other by import and export: in first pond, carries out ozonation aerated and add metal flocculant, simultaneously to sewage oxidation and flocculation；In second pond, the sedimentation method are used to make sewage and flocculate separate.In the 3rd pond, active carbon fiber felt absorption is used to add ozonisation, it is achieved sewage of low concentration processes and reaches qualified discharge.The technique rationalized, the highest treatment effeciency brought and effect, make treatment effeciency obtain into multiple and promote, cost can be substantially reduced again.This flow process creativeness uses ozone integral system, utilizes aeration to add flocculence and instead of air supporting method, once-used degradeable multiple types pollutant, the key position that the system of being truly realized is formed a connecting link.COD clearance reaches 80.4%, accomplish advanced treating. rest COD concentration is the lowest, it is appropriate to after " absorption ozonisation " make Organic substance obtain the absorption of Nano grade, sewage i.e. can be with qualified discharge, this is that prior art can not be compared, thoroughly solve that old technology exists technique is dilatory, long flow path, occupation of land is many, operating cost is high, accessory power facility is many problem, there is simple to operate, running environment Clean and comfortable, the operation time greatly reduces, work efficiency is high, it is few to produce mud, feature without secondary product.The present invention can substitute current equipment and process program completely.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the inventive method.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.
nullA kind of processing method of oil-polluted water，With reference to Fig. 1，It is will to place in sewage collecting to Water Tank，Under gravity，Oil slick、Sewage and the impurity heavier than sewage separate level from top to bottom，After being layered，By oil slick、Sewage and the impurity layering discharge collection than sewage weight，Oil slick is flowed out by blowdown pipeline，Impurity than sewage weight，Such as silt etc.，After emptying，Labor cleaning is carried out by manhole，Sewage is flowed out by water outlet pipeline，Through water pump lifting，Enter closed corrugated plate interceptor，After making contact by sewage and many group swash plates，Macromole oil coalesces together，Climb up on top of the water up along swash plate，Oil slick is collected with collecting tank，Oil slick flows in oil sump after being collected，The sewage separated is flowed out by outlet system，Realize oil、Water separates，Sewage after separation uses ozone integral treatment method to process，The water of discharge standard must be reached；Described ozone integral treatment method be sewage is sequentially placed into coacervation Aeration tank, sedimentation tank, absorption Aeration tank process, and sewage carry out flocculation oxidation, quiescent setting, absorption reoxidize.
Further, described ozone integral treatment method is: the sewage after separation puts into coacervation Aeration tank by water inlet pipe, water inlet pipe is arranged on coacervation Aeration tank, flocculation agent is added by the dosing pump pipeline connected with water inlet pipe, in the present embodiment, flocculation agent uses PAFC, by chemicals dosing plant proportioning solution, solution concentration 1-5%, adding flocculation agent PAFC is every liter of sewage 14-24 milligram, ozone generator arrives air inlet pipe by pipelined ozone, air inlet pipe end connects multiple rotary cutting aerator, the dominant response that ozone occurs in water is divided into two parts, one is to oxidize away most Hydrocarbon Organic, with sulfur phosphorus oxynitride, sewage is made to rapidly remove stink, thoroughly remove oil molecule, produce carbon dioxide and catabolite；Two be by positive and negative charge and reaction, greatly accelerate the coagulation of flocculate.In the process, oxidation reaction and flocculation agent will not clash effect, and being because ozone will not hydrogen oxide ferrum oxide and alumine hydroxide colloid.Ozone is the polar molecule with negative electricity, and easily decomposes, and generates the oxygen atom of oxygen molecule and negative electricity, PAFC hydrolysis creates ferric hydroxide colloid, and alumine hydroxide colloid, and metallic colloid is with positive charge, positive and negative charge occurs to neutralize reaction, makes coagulation reaction between colloid molecules.Ozone makes the efficient coacervation of coacervation thing, use scrape foam plate and the foam of generation is scraped row's foam mouth and collects in floating oil collecting pond, adds anti-foam agent and processes, and the sewage in coacervation Aeration tank enters sedimentation tank by drain pipe；The sewage entering sedimentation tank precipitates, and coacervation thing, with speed coagulation faster, concentrates in a stationary situation, falls in mud-collecting slot, enters floating oil collecting pond by perforated sludge discharge pipe after being separated, and sewage is entered absorption Aeration tank by drain pipe；Enter the sewage of absorption Aeration tank, use the ozonation aerated process of micro-hole aerator, micro-hole aerator is connected with ozone generator by pipeline, use active carbon fiber felt can aoxidize with strong adsorption ozone and organic molecule, heavy metal ion, antibacterial etc. and sterilize, in absorption Aeration tank, ozone dosage is 6-10mg/L, in water, Residual ozone concentration is maintained at 0.2～0.4mg/L, reaches discharge standard, directly use water pump discharge after process.Interval takes sewage chemical examination in pond simultaneously, when reach saturated after, strengthen ozone ventilation to rinse, it is susceptible to desorption reaction, i.e. when work is adsorbed, the usage amount of ozone is general, some adsorbed material is not by ozone oxidation, along with oxidation product or precipitate are deposited in micropore together, slowly allow for fiber gap to be saturated, it is accomplished by being desorbed, desorption is to strengthen ozone amount, rinse disturbance micropore, and owing to density of ozone increases, there is sufficient condition that the contaminant molecule contention of nanopores is got off, thus carry out being oxidized into the natural molecule that environment is safe from harm.Under the common effect of absorption and desorption, active carbon fiber felt can reduce use cost with Reusability.Ozone integration each pond inner wall material uses 304 rustless steels.
A specific embodiment presented below, in order to be further appreciated by the present invention is described.
Treatment sewage pollutant load scope: oil content (after oil slick) 100 ~ 200 mg/L, COD concentration 1000 ~ 4000 mg/L, turbidity scope 150 ~ 450NTU.
The present invention is not affected by sewage salinity, is not subject to seasonal restrictions, and all can run under room temperature.By treating capacity 40 cubes per hour as a example by, be illustrated:
Pump power 5.5KW, flow 50 cubes, coacervation Aeration tank: long 2 meters, wide 2 meters is high 3 meters.Bottom taps into water pipe, air inlet pipe and evacuated tube, and chemical feed pipe is connected on water inlet pipe；Air inlet pipe connects multiple rotary cutting aerator by gas-distributing pipe, a diameter of 260mm of rotary cutting aerator, arranges three rows, often row three set；Ozone generator, same of system share, use source of oxygen, power 16KW, ozone output 2.5kg/h, select concentration 6% ~ 8% ozone generator, in coacervation Aeration tank, dosage controls at 50 mg/L, the hydraulic detention time of aeration link 15 minutes.Sewage after coacervation Aeration tank processes, after stratification, takes supernatant, colorless and odorless, and clarity is high.COD, by 2140 mg/L, reduces to 390 mg/L, and degradation rate is up to 81.7%, and turbidity is reduced to 11.9NTU by 210NTU, and clearance is 94.3%, oil content clearance 100%；Described sedimentation tank, long 7 meters, wide 2 meters, high 3 meters, hydraulic detention time one hour；Absorption Aeration tank, long 2 meters, wide 2 meters, high 3 meters.By tightening band in pond, oblique fixing active carbon fiber felt, active carbon fiber felt is installed in the stainless steel silk mesh bag of 120 mesh.Ozone dosage controls at 8 mg/L.In water, Residual ozone concentration uses 0.2～0.4mg/L, and to guarantee sterilization, water outlet COD, by 390 mg/L, reduces to 44.7 mg/L, and degradation rate up to 88.7%. turbidity is reduced to 1.8NTU by 11.9NTU.Interval sample examination, when chemically examining water outlet COD value and being increasing, represents that absorption tends to saturated, strengthens ozone and be added to concentration to certain value, typically add ozone and arrive working value more than 3 times at ordinary times, desorption process 15 ~ 25 minutes.
The present invention adds ozone, flocculant is same unit, ozone and pollutant or flocculation agent hydrolyzate unrestricted choice reaction path, saves very much, process sewage the most efficient on using.Avoid using tradition air-floating apparatus, it is not necessary to use air compressor machine, air dissolved pump, circulating pump, and dissolving, decrease auxiliary facility, and multiple unit are reduced to one.Greatly reduce place occupancy；Reduce operating cost, the most original 1/10 to ten/6ths；It is few that system produces mud, is only 1/to five/4ths when using air supporting, for using 1/10th of bioanalysis.Without secondary product.Flow process is short, and system is more stable；Simple to operate, running environment Clean and comfortable；Decreasing the time, efficiency is high.Being processed by the optimization of this technique, the clearance of former water COD is more than 96.7%, and heavy metal, the chemical examination inspection of oil content, float does not measures, and can be considered that clearance is 100%；Turbidity is 0.5-3NTU.Sewage drainage standard meets " integrated wastewater discharge standard GB8978-1996 " and " DB37/676-2007 " relevant regulations.Under new technological flow, port and pier sewage, fully achieve this discharge standard.
Presently disclosed embodiment, is used for making those skilled in the art realize or using the present invention.Multiple amendment or modification to these embodiments will be apparent from for a person skilled in the art.General Principle described herein can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention is not intended to be limited to embodiment described herein, and is to fit to the widest scope consistent with principles disclosed herein and novel features.
Claims (4)
1. the processing method of an oil-polluted water, it is characterized in that the method is will to place in sewage collecting to Water Tank, after being layered, by oil slick, sewage and discharge collection than the impurity layering of sewage weight, the sewage collected enters closed oil water separator, oil, water being separated, the sewage after separation uses ozone integral treatment method to process, and must reach the water of discharge standard；
Described ozone integral treatment method be sewage is sequentially placed into coacervation Aeration tank, sedimentation tank, absorption Aeration tank process, and sewage carry out flocculation oxidation, quiescent setting, absorption reoxidize.
The processing method of a kind of oil-polluted water the most according to claim 1, is characterized in that described ozone integral treatment method comprises the following steps:
Sewage after a, separation puts into coacervation Aeration tank by water inlet pipe, water pipe, air inlet pipe and evacuated tube is tapped into bottom coacervation Aeration tank, chemical feed pipe is connected on water inlet pipe, chemicals dosing plant adds flocculation agent by the chemical feed pipe connected with water inlet pipe, ozone generator arrives air inlet pipe by pipelined ozone, air inlet pipe end connects rotary cutting aerator, use is scraped foam plate and the foam of generation is scraped row's foam mouth and collects in floating oil collecting pond, adding anti-foam agent to process, the sewage in coacervation Aeration tank enters sedimentation tank by drain pipe；Very small amount coacervation thing is periodically discharged by evacuated tube；
B, the sewage of entrance sedimentation tank precipitate, after coagulation thing precipitation, and static concentration, fall in mud-collecting slot, after being separated by perforated sludge discharge pipe, enter collecting pit, sewage is entered absorption Aeration tank by drain pipe；
C, the sewage of entrance absorption Aeration tank, use active carbon fiber felt adsorption treatment and the ozonation aerated process of micro-hole aerator, and micro-hole aerator is connected with ozone generator by pipeline, after reaching discharge standard, directly discharges after process.
The processing method of a kind of oil-polluted water the most according to claim 2, it is characterized in that described flocculation agent uses PAFC, by chemicals dosing plant proportioning solution, solution concentration 1-5%, adding flocculation agent PAFC is every liter of sewage 14-24 milligram, ozone generator arrives air inlet pipe by pipelined ozone, and air inlet pipe end connects multiple rotary cutting aerator by gas-distributing pipe.
The processing method of a kind of oil-polluted water the most according to claim 2, is characterized in that in described absorption Aeration tank, ozone dosage is 6-10
Mg/L, in water, Residual ozone concentration uses 0.2～0.4mg/L.
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| CN201610544254.9A CN106007091A (en) | 2016-07-12 | 2016-07-12 | Treatment method for oily sewage |
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| CN201610544254.9A CN106007091A (en) | 2016-07-12 | 2016-07-12 | Treatment method for oily sewage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110436596A (en) * | 2019-09-05 | 2019-11-12 | 辽宁城建设计院有限公司 | A kind of processing of combined type backwashing water and reclaiming system |
| CN112174389A (en) * | 2020-10-27 | 2021-01-05 | 东台市东方船舶装配有限公司 | Ship complex oily water treatment system |
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| CN102050532A (en) * | 2009-11-02 | 2011-05-11 | 上海安洁士石油技术有限公司 | Integral treatment process of oily sewage of oil field |
| CN103288236A (en) * | 2013-05-27 | 2013-09-11 | 山东三维石化工程股份有限公司青岛分公司 | Treatment method for salt-containing wastewater |
| CN104743712A (en) * | 2015-04-13 | 2015-07-01 | 刘冬峰 | Method for quickly removing greasy dirt in sewage |
| CN105060562A (en) * | 2015-08-13 | 2015-11-18 | 山东省环科院环境工程有限公司 | Deep treatment method of tannery wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038446A (en) * | 1988-05-27 | 1990-01-03 | 阿莫科公司 | Produce improving one's methods of polycarboxylic aromatic acids |
| CN102050532A (en) * | 2009-11-02 | 2011-05-11 | 上海安洁士石油技术有限公司 | Integral treatment process of oily sewage of oil field |
| CN103288236A (en) * | 2013-05-27 | 2013-09-11 | 山东三维石化工程股份有限公司青岛分公司 | Treatment method for salt-containing wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110436596A (en) * | 2019-09-05 | 2019-11-12 | 辽宁城建设计院有限公司 | A kind of processing of combined type backwashing water and reclaiming system |
| CN112174389A (en) * | 2020-10-27 | 2021-01-05 | 东台市东方船舶装配有限公司 | Ship complex oily water treatment system |
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