CN104743712B - A kind of dirty method of quick removal Oil in Sewage Water - Google Patents
A kind of dirty method of quick removal Oil in Sewage Water Download PDFInfo
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- CN104743712B CN104743712B CN201510171743.XA CN201510171743A CN104743712B CN 104743712 B CN104743712 B CN 104743712B CN 201510171743 A CN201510171743 A CN 201510171743A CN 104743712 B CN104743712 B CN 104743712B
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- AKIOHULKHAVIMI-UHFFFAOYSA-N trichloro(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,12-pentacosafluorododecyl)silane Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)[Si](Cl)(Cl)Cl AKIOHULKHAVIMI-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of dirty method of quick removal Oil in Sewage Water, by carrying out sewage collecting, asphalt felt absorption, water-oil separating, oil removal by air bubbling, ultrasonic oxidation, flocculation reaction, adsorption reaction, filtering and impurity removing, 9 step process of sterilization treatment successively to oil-polluted water, can quickly process high salt water body, removal efficiency is high, stable effluent quality, pollutant is substantially removed, and disclosure satisfy that the requirement of middle water.The method of the present invention has significant Saving in time costs, can process polluted-water rapidly, it is to avoid the expansion of the pollution range of oil.
Description
Technical field
The invention belongs to water and pollute process field, particularly relate to a kind of dirty method of quick removal Oil in Sewage Water.
Background technology
The process of oil-containing water body is a critically important field in existing sewage disposal, enter the oil in water environment, the oxygen in air can be stoped soluble in water, make the death because of anoxic such as hydroplankton, and cause fish and shellfish etc. spoiled, inedibility, and oily it is also possible to burn and produce safety problem in the coalescence of water surface.With attention and China increasing to pollution control dynamics to environmental protection for the people, the research of oiliness sewage treatment technology and application are developed rapidly, can be divided into Mechanical Method, chemical method, physical-chemical process and bioanalysis by its action principle and removal object.But prior art is more used for petroleum wastewater field, (such as: seawater or high salt water body) in the higher water body of ion concentration is merely applied mechanically and processes the biochemical mode of sanitary wastewater described waste water is processed, its discharge water can only achieve three grades of discharge standards, i.e. discharge the COD < 500mg/L of water, and oily waste treatment efficiency is low, there is no deep purifying reuse and emergency handling function.
Content of the invention
In order to overcome deficiency of the prior art, it is an object of the invention to provide a kind of dirty method of quick removal Oil in Sewage Water, can quickly process high salt water body, pollutant advanced treating, removal efficiency is high, stable effluent quality, pollutant is substantially removed, and disclosure satisfy that the requirement of middle water.
Technical scheme is as follows.
A kind of dirty method of quick removal Oil in Sewage Water, comprises the following steps:
Step 1, sewage collecting: oil-polluted water is used the extremely emergent collecting-tank of transport pump, stands after stable and layering until the sewage in emergent collecting-tank, use oil pump to take upper oil phase away；
Step 2, asphalt felt adsorbs: being laid in asphalt felt on the face of the sewage after step 1 is processed, utilizing asphalt felt to adsorb the oil in sewage, described asphalt felt is polypropylene fibre asphalt felt；
Step 3, water-oil separating: the sewage after processing step 2 is passed through in oil water separator and carries out water-oil separating；
Preferably, described oil water separator includes sewage inlet pipe, connecting tube, water-oil separating film, housing, oil phase efferent duct and aqueous phase efferent duct, sewage inlet pipe connects with connecting tube, housing is network structure, it is positioned at the inside of oil phase efferent duct and fixing with the upper end of oil phase efferent duct is connected, and the upper end of housing connects with the lower end of connecting tube, and lower end connects with aqueous phase efferent duct, the sidewall of housing connects with oil phase efferent duct, and water-oil separating film is positioned at case inside；
Step 4, oil removal by air bubbling: the sewage pump processing step 3 is delivered in air-floating apparatus, carry out air-flotation process, remove in sewage to suspend, to emulsify the insoluble impurities that form exists；
Step 5, ultrasonic oxidation: the series flow of sewage processing step 4 crosses Vltrasonic device, in Vltrasonic device, pulsed adds oxidant simultaneously, and described oxidant is the mixed solution of hydrogen peroxide and potassium hydroxide, wherein, the mass values of hydrogen peroxide and potassium hydroxide is 3:1；Sewage is the 1-20 second in the time of staying of Vltrasonic device；
Step 6, flocculation reaction: the sewage from step 5 being introduced flocculation basin, adding composite flocculation agent, described composite flocculation agent includes poly-aluminum calcium chloride, iron chloride, polyacrylamide, citric acid, polyferric chloride, bentonite and water；Preferably, according to weight meter in composite flocculation agent: poly-aluminum calcium chloride: iron chloride: polyacrylamide: citric acid: polyferric chloride: bentonite: the ratio of water is 1:0.8-0.9:1-2:0.1-2:0.1-0.4:1-4:500-1000；
Step 7, adsorption reaction: the sewage processing step 6 introduces pulverized coal dregs ash and processes in pond, Xiang Chizhong puts into pulverized coal dregs ash adsorbent and carries out adsorption treatment to sewage, and it is 1-2 days that fly ash absorbent adds weight and sewage part by weight in 1-1.5:80-90, process time；
The preparation method of described pulverized coal dregs ash adsorbent is to mix pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid according to part by weight 40:10:20:10, then adds water and is prepared as the slurries that solid content is 50-55%；Slurries spray dried into powder form particle, then by powdered granule at 500-700 DEG C of roasting 3-5h, is then cooled to room temperature, obtains pulverized coal dregs ash adsorbent；
Step 8, filtering and impurity removing: the sewage processing step 7 uses film filter to carry out filtration treatment；
Step 9, sterilization treatment: the sewage obtaining step 8 introduces bactericidal unit, described bactericidal unit includes water inlet pipe, sterilizing pond, chlorine dioxide generator and outlet conduit；Outlet conduit flow out water be process after product water.
In the present invention, by carrying out sewage collecting, asphalt felt absorption, water-oil separating, oil removal by air bubbling, ultrasonic oxidation, flocculation reaction, adsorption reaction, filtering and impurity removing, 9 step process of sterilization treatment successively to oil-polluted water, can quickly process high salt water body, removal efficiency is high, stable effluent quality, pollutant is substantially removed, and disclosure satisfy that the requirement of middle water.The method of the present invention has significant Saving in time costs, can process polluted-water rapidly, it is to avoid the expansion of the pollution range of oil.Using asphalt felt, air supporting, the sewage after oxidation processes to be essentially free of oil pollutant, using flocculation, after adsorption treatment, the metal ion during sewage converges is removed substantially, reaches the requirement of middle water after filtering and impurity removing, sterilization treatment.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further elaborated.
Embodiment
1
A kind of dirty method (wherein oil-polluted water salt mass fraction is 1.5%) of quick removal Oil in Sewage Water, comprises the following steps.
Step 1, sewage collecting: oil-polluted water is used the extremely emergent collecting-tank of transport pump, stands after stable and layering until the sewage in emergent collecting-tank, use oil pump to take upper oil phase away.Equipment used by this step and operation are prior art, belong to known category, are not repeated at this.
Step 2, asphalt felt adsorbs: being laid in asphalt felt on the sewage water surface after step 1 is processed, utilizing asphalt felt to adsorb the oil in sewage, described asphalt felt is polypropylene fibre asphalt felt.
Step 3, water-oil separating: the sewage after processing step 2 is passed through in oil water separator and carries out water-oil separating.
Step 4, oil removal by air bubbling: the sewage pump after processing step 3 is delivered in air-floating apparatus, carry out air-flotation process, in order to remove in sewage to suspend, to emulsify the insoluble impurities that form exists.
Step 5, ultrasonic oxidation, the series flow of sewage after processing step 4 crosses Vltrasonic device, is continuously added to oxidant simultaneously in Vltrasonic device, and described oxidant is the mixed solution of hydrogen peroxide and potassium hydroxide, and wherein, the mass values of hydrogen peroxide and potassium hydroxide is 3:1；Sewage is 10 seconds in the time of staying of Vltrasonic device；Wherein, wherein the frequency of Vltrasonic device is 20 kHz, and power is 500W.Wherein said Vltrasonic device can be specially the ultrasonic generator with tank, and described ultrasonic generator is converted into the mechanical oscillation of same frequency by the piezoelectric inverse effect of transducer, and the form with superaudio compressional wave radiates in the liquid of tank.
Step 6, flocculation reaction: the sewage from step 5 being introduced flocculation basin, adding composite flocculation agent, described composite flocculation agent includes poly-aluminum calcium chloride, iron chloride, polyacrylamide, citric acid, polyferric chloride, bentonite and water；Wherein, according to weight meter in composite flocculation agent: poly-aluminum calcium chloride: iron chloride: polyacrylamide: citric acid: polyferric chloride: bentonite: the ratio of water is 1:0.8:1:0.1:0.1:1:500.After being sufficiently mixed, the flocculating setting time is 10 minutes, then filters.
Step 7, adsorption reaction: the sewage after processing step 6 introduces pulverized coal dregs ash and processes in pond, puts into pulverized coal dregs ash adsorbent and carry out adsorption treatment to sewage in pond, and it is 8h that fly ash absorbent adds weight and sewage part by weight in 1:90, process time.
The preparation method of described pulverized coal dregs ash adsorbent is to mix pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid according to part by weight 40:10:20:10, then adds water and is prepared as the slurries that solid content is 50%；Slurries spray dried into powder form particle, then by powdered granule at 500 DEG C of roasting 3h, is then cooled to room temperature, obtains pulverized coal dregs ash adsorbent.
Step 8, filtering and impurity removing: the sewage after processing step 7 uses film filter to carry out filtration treatment；Wherein, film filter is microporous membrane filters, and aperture φ is 0.22 μm, and pressure reduction is 0.01 Mpa, and flow is 3m3/min。
As filter elements, it is structurally characterized in that filtering layer is very thin to filter membrane, thus its filtration mechanism mainly screens out effect, and adsorption effect is very little.Therefore, the filtering accuracy of film filter is higher, and size controlling is more stable, and backwashes easy restorability.But if water contains oil, it is then easy to blocking and be difficult to backwash, i.e. membrane pollution problem: due to the unstability of oil droplet, not necessarily screened out more than the oil droplet of fenestra, pass through fenestra because may split into less than the oil droplet of fenestra, although they can pass through film itself, but can be agglomerated into big oil droplet in supporting layer and by the micro-porous adsorption of supporting layer, and cannot be desorbed.Therefore, oil-polluted water can form blocking, and backwash difficulty to film filter.After step 1 ~ 7 are filtered, the big portion of the oil in oil-polluted water removes, and oil content is reduced to 19mg/L by initial 3900mg/L, now carries out filtration again and can greatly extend membrane life.
Step 9, sterilization treatment: the sewage obtaining step 8 introduces bactericidal unit, described bactericidal unit includes water inlet pipe, sterilizing pond and the outlet conduit that chlorine dioxide generator and pipeline order are connected, and chlorine dioxide generator is connected with sterilizing pond pipeline；Outlet conduit flow out water be process after product water.
Wherein said oil water separator main operational principle is that applied fluid mechanics is theoretical, uninterruptedly synchronize the moment that (the synchronized turbulent flow i.e. relatively of profit) flows through at the big flow of oil-polluted water, oil droplet is by kinetic energy during sewage flow at high speed, collision continuously, change from small to big, thereby speed up motion, make the oil of different specific weight and moisture stream, be layered and separate, finally realize the purpose of water-oil separating；Described air-floating apparatus is the equipment of a kind of solid suspension, grease and various jelly removed in various industry and municipal wastewater.In like manner, described polypropylene fibre asphalt felt, Vltrasonic device, film filter also all can be bought from market, and its internal structure and concrete operations mode are not repeated at this.And the structure of bactericidal unit is optimum choice in the present embodiment, it is also possible to choose other Water Disinfection equipment, such as Denmark DCW Water Disinfection disinfection equipment, include hypochlorous acid generator in its unit.
Embodiment
2
A kind of dirty method (wherein oil-polluted water is seawater) of quick removal Oil in Sewage Water, comprises the following steps.
Step 1, sewage collecting: oil-polluted water is used the extremely emergent collecting-tank of transport pump, stands after stable and layering until the sewage in emergent collecting-tank, use oil pump to take upper oil phase away.
Step 2, asphalt felt adsorbs: being laid in asphalt felt on the sewage water surface after step 1 is processed, utilizing asphalt felt to adsorb the oil in sewage, described asphalt felt is polypropylene fibre asphalt felt.
Described polypropylene fibre asphalt felt preparation process is as follows: be dissolved in the polypropylene of 30 weight portions in the oxolane of 300 weight portions, stirs 8h, obtain polypropylene solution at 60 DEG C；The polymethyl methacrylate of 25 weight portions is dissolved in the dimethylacetylamide of 300 weight portions, stirs 2h at 50 DEG C, obtain polymethyl methacrylate solution；Polypropylene solution and polymethyl methacrylate solution equal-volume are mixed, is stirred at room temperature 60min；Afterwards the mixed solution of acquisition is put in the stainless steel spinneret pipe of electrospinning device, stainless steel spinneret tube head internal diameter is 2mm, with aluminium set as anode, aluminium foil is that negative electrode receives product as receiving plate, two anode-cathode distances are 20cm, it is 20KV that two interpolars apply voltage, carries out Electrospun, obtains polypropylene nano fiber；It is sprayed at perfluorododecyl trichlorosilane on the polypropylene fibre of acquisition, carry out oleophylic to it modified；Modified polypropylene nano fiber is made asphalt felt；Polypropylene fibre asphalt felt prepared by this kind of method has the extremely strong adsorptivity that powerful capillary attraction power is brought, thus absorbs leakage liquid and flow to oil absorbent material, effectively prevents the diffusion of leakage, and product is reusable after strand, extruding, can reclaim 72%
The leakage fluid of-90%.The advantage of this material also fire-retardant, do not produce dust, without the storage advantage such as restriction time.
Step 3, water-oil separating: the sewage after processing step 2 is passed through in oil water separator and carries out water-oil separating.
Step 4, oil removal by air bubbling: the sewage pump after processing step 3 is delivered in air-floating apparatus, carry out air-flotation process, remove in sewage to suspend, to emulsify the insoluble impurities that form exists.
Step 5, ultrasonic oxidation: the series flow of sewage after processing step 4 crosses Vltrasonic device, is continuously added to oxidant in Vltrasonic device simultaneously, and described oxidant is the mixed solution of hydrogen peroxide and potassium hydroxide, wherein, the mass values of hydrogen peroxide and potassium hydroxide is 3:1；Sewage is 20 seconds in the time of staying of Vltrasonic device；Wherein, wherein the frequency of Vltrasonic device is 20 kHz, and power is 500W.
Step 6, flocculation reaction: the sewage from step 5 being introduced flocculation basin, adding composite flocculation agent, described composite flocculation agent includes poly-aluminum calcium chloride, iron chloride, polyacrylamide, citric acid, polyferric chloride, bentonite and water；Wherein, according to weight meter in composite flocculation agent: poly-aluminum calcium chloride: iron chloride: polyacrylamide: citric acid: polyferric chloride: bentonite: the ratio of water is 1:0.9:2:2:0.4:4:1000.
Step 7, adsorption reaction: the sewage after processing step 6 introduces pulverized coal dregs ash and processes in pond, puts into pulverized coal dregs ash adsorbent and carry out adsorption treatment to sewage in pond, and it is 11h that fly ash absorbent adds weight and sewage part by weight in 1.5:80, process time；The preparation method of described pulverized coal dregs ash adsorbent is to mix pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid according to part by weight 40:10:20:10, then adds water and is prepared as the slurries that solid content is 55%；Slurries spray dried into powder form particle, then by powdered granule at 700 DEG C of roasting 5h, is then cooled to room temperature, obtains pulverized coal dregs ash adsorbent.
Step 8, filtering and impurity removing: the sewage after processing step 7 uses film filter to carry out filtration treatment；Wherein, film filter is microporous membrane filters, and aperture φ is 1 μm, and pressure reduction is 0.01 Mpa, and flow is 3m3/min。
Step 9, sterilization treatment: the sewage obtaining step 8 introduces bactericidal unit, described bactericidal unit includes water inlet pipe, sterilizing pond and the outlet conduit that the pipeline order that hypochlorous acid generator and pipeline order are connected is connected, and hypochlorous acid generator is connected with sterilizing pond pipeline；Outlet conduit flow out water be process after product water.The bactericidal unit applied is specifically as follows Denmark DCW Water Disinfection sterilizing unit.
Testing above-described embodiment the 1st, 2 results processing, data are as shown in table 1.Table 1:
| Water quality index | Unit | Before process | Embodiment 1 | Embodiment 2 |
| Oil content | mg/L | 3900 | 19 | 17 |
| Escherichia coli | Cfu/ml | 3.5*106 | 0 | 1 |
| COD | mg/L | 2000 | 30 | 35 |
Described waste water is processed by the biochemical mode that a kind of high salt of prior art or seawater greasy dirt organic chemical waste water processing method typically all merely apply mechanically process sanitary wastewater, its discharge water can only achieve three grades of discharge standards, i.e. discharge the COD < 500mg/L of water, and this method of wastewater treatment does not has deep purifying reuse and emergency handling function.The present invention has emergency handling function, is suitable for harbour paroxysmal greasy dirt dye, for example, reveals.The method of the present invention has significant Saving in time costs, in there is 12 hours emergent oil pollution time, can process polluted-water；Stable effluent quality of the present invention, the COD of the water after process can stably be less than 50
Mg/L, reaches first discharge standard.
The method according to the invention, for the sewage being contaminated by greasy dirt, first sewage is collected, asphalt felt is used to absorb afterwards, preliminary treatment is carried out to sewage, then water-oil separating is carried out, to separate oil remaining in sewage further so that oil content is reduced to carry out the concentration of deep oxidation process.Deep oxidation processes and includes oil removal by air bubbling and two operations of ultrasonic oxidation, and wherein the former oxidation Decomposition falls most greasy dirt, reluctant benzene homologues in the latter's main oxidation sewage.After deep oxidation step, flocculation treatment and adsorption treatment are carried out to the metal ion in sewage, use the mode of filtration to remove the particulate matter in above reacting afterwards, finally carry out sterilization treatment, reach stable, nontoxic effluent quality.Connecting each other before and after the step of the present invention, being on the basis of rear step in front step, be the process further in front step in rear step, order can not overturn, the only method according to the present invention, can be only achieved the effect of quick, efficient, stable process sewage.
Although above-described embodiment is made that detailed description to the present invention; but its a part of embodiment that is only the present invention; rather than whole embodiment, people can also obtain other embodiments according to the present embodiment under the premise of without creativeness, and these embodiments broadly fall into protection scope of the present invention.
Claims (1)
1. the method for a quick removal Oil in Sewage Water dirt, it is characterised in that its process step is:
Step 1, sewage collecting: oil-polluted water is used the extremely emergent collecting-tank of transport pump, stands after stable and layering until the sewage in emergent collecting-tank, use oil pump to take upper oil phase away；
Step 2, asphalt felt adsorbs: is laid in asphalt felt on the face of the sewage after step 1 is processed, utilizes asphalt felt to adsorb the oil in sewage；
Step 3, water-oil separating: the sewage after processing step 2 is passed through in oil water separator and carries out water-oil separating；
Step 4, oil removal by air bubbling: the sewage pump after processing step 3 is delivered in air-floating apparatus, carry out air-flotation process；
Step 5, ultrasonic oxidation: the series flow of sewage after processing step 4 crosses Vltrasonic device, in Vltrasonic device, add oxidant simultaneously, sewage is the 10-20 second in the time of staying of Vltrasonic device；Described oxidant is the mixed solution of hydrogen peroxide and potassium hydroxide；
Step 6, flocculation reaction: the sewage from step 5 is introduced flocculation basin, adds flocculant；
Step 7, adsorption reaction: the sewage processing step 6 introduces pulverized coal dregs ash and processes in pond, puts into pulverized coal dregs ash adsorbent and carry out adsorption treatment to sewage in pond, fly ash absorbent adds weight and sewage part by weight at 1-1.5:80-90, process time 8 ~ 11h；
Step 8, filtering and impurity removing: the sewage processing step 7 uses film filter to carry out filtration treatment；
Step 9, sterilization treatment: the sewage that obtains step 8 introduces bactericidal unit, the water that described bactericidal unit outlet conduit flows out be process after product water；
In described step 5, the mass values of hydrogen peroxide and potassium hydroxide is 3:1；
Described flocculant is composite flocculation agent, including poly-aluminum calcium chloride, iron chloride, polyacrylamide, citric acid, polyferric chloride, bentonite and water.
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| CN107857403B (en) * | 2016-01-14 | 2021-01-01 | 邱宏声 | A kind of catering wastewater degreasing treatment system |
| CN106007091A (en) * | 2016-07-12 | 2016-10-12 | 韩德玉 | Treatment method for oily sewage |
| CN106517373A (en) * | 2016-11-18 | 2017-03-22 | 郑州丽福爱生物技术有限公司 | Industrial wastewater treating agent and preparation method thereof |
| CN106335945A (en) * | 2016-11-18 | 2017-01-18 | 郑州丽福爱生物技术有限公司 | Sewage treatment agent and preparation method thereof |
| CN107381675A (en) * | 2017-08-31 | 2017-11-24 | 太仓雄鹰皮具有限公司 | Inexpensive sewage-treating agent of garment material production environmental protection and preparation method thereof |
| CN107473532B (en) * | 2017-10-02 | 2020-07-07 | 湛江市绿城环保再生资源有限公司 | Method and device for treating emulsion wastewater |
| CN108706736B (en) * | 2018-06-05 | 2019-04-30 | 中国科学院南京地理与湖泊研究所 | A kind of ecological restoration method of eutrophication water body fenugreek sediments |
| CN108726778B (en) * | 2018-06-13 | 2021-04-13 | 山东龙港硅业科技有限公司 | Comprehensive utilization method of inorganic silicon wastewater |
| CN109337709A (en) * | 2018-11-30 | 2019-02-15 | 湖南金润昌石油有限责任公司 | Castoff processing system and technique during a kind of waste plastics recycling diesel production |
| CN110156220B (en) * | 2019-07-03 | 2023-12-29 | 浙江海洋大学 | Port greasy dirt processing apparatus |
| CN111632503A (en) * | 2020-05-25 | 2020-09-08 | 武汉中兴创新材料技术有限公司 | Petroleum oil absorption material and application thereof |
| CN119735347B (en) * | 2025-03-06 | 2025-05-16 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Intelligent sewage treatment and reclaimed water resource utilization device |
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