CN104743712A - Method for quickly removing greasy dirt in sewage - Google Patents
Method for quickly removing greasy dirt in sewage Download PDFInfo
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- CN104743712A CN104743712A CN201510171743.XA CN201510171743A CN104743712A CN 104743712 A CN104743712 A CN 104743712A CN 201510171743 A CN201510171743 A CN 201510171743A CN 104743712 A CN104743712 A CN 104743712A
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Abstract
The invention discloses a method for quickly removing greasy dirt in sewage. The method sequentially comprises the following nine steps on oil-containing sewage: collecting sewage; adsorbing by an oil adsorbing felt; separating oil and water; air-floating to remove oil; carrying out ultrasonic oxidization; carrying out flocculation reaction; carrying out adsorption reaction; filtering and removing impurities; and sterilizing. High sanity water bodies can be quickly treated, so that the removal efficiency is high, the effluent quality is stable, the pollutants are substantially removed, and the requirements on reclaimed water can be satisfied. The method disclosed by the invention has a remarkable time benefit and can be used for quickly treating the polluted water body so as to avoid expansion of the pollution scope of oil.
Description
Technical field
The invention belongs to water pollutions process field, particularly relate to the method for a kind of quick removal Oil in Sewage Water dirt.
Background technology
The process of oil-containing water body is a very important field in existing sewage disposal, enter the oil in water surrounding, 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 also likely burn at the coalescent oil of water surface and produce safety problem.Along with people to the attention of environmental protection and China to the increasing of Pollution abatement dynamics, the research and apply of oiliness sewage treatment technology obtains and develops rapidly, by its action principle with remove object and can be divided into mechanical process, chemical method, physico-chemical processes and biological process.But prior art is more for petroleum wastewater field, the biochemical mode (as: seawater or haline water body) in the water body that ion content is higher merely being applied mechanically to process sanitary wastewater processes described waste water, its discharge water can only reach three grades of emission standards, the i.e. COD<500mg/L of discharge water, and oily waste treatment efficiency is low, there is no deep purifying reuse and emergency handling function.
Summary of the invention
In order to overcome deficiency of the prior art, the object of this invention is to provide the method for a kind of quick removal Oil in Sewage Water dirt, haline water body can be processed fast, pollutent advanced treatment, removal efficiency is high, stable effluent quality, pollutent is removed substantially, can meet the requirement of middle water.
Technical scheme of the present invention is as follows.
A method for quick removal Oil in Sewage Water dirt, comprises the following steps:
Step 1, sewage collecting: used by oily(waste)water pump delivery to emergent water collecting basin, leaves standstill stable until the sewage in emergent water collecting basin and after layering, uses oil pump to take upper oil phase away;
Step 2, asphalt felt adsorb: asphalt felt is laid in step 1 process after sewage face on, utilize asphalt felt to adsorb the oil in sewage, described asphalt felt is polypropylene fibre asphalt felt;
Step 3, oily water separation: the sewage after step 2 being processed passes in water-and-oil separator and carries out oily water separation;
Preferably, described water-and-oil separator comprises sewage inlet pipe, pipe connecting, oily water separation film, housing, oil phase output tube and aqueous phase output tube, sewage inlet pipe is communicated with pipe connecting, housing is reticulated structure, it is positioned at the inside of oil phase output tube and is fixedly connected with the upper end of oil phase output tube, and the upper end of housing is communicated with the lower end of pipe connecting, and lower end is communicated with aqueous phase output tube, the sidewall of housing is communicated with oil phase output tube, and oily water separation film is positioned at case inside;
Step 4, oil removal by air bubbling: sump pump step 3 processed is delivered in air-floating apparatus, carries out air-flotation process, removes in sewage with the insoluble impurities suspended, emulsification form exists;
Step 5, ultrasonic oxidation: series flow of sewage step 4 processed crosses Vltrasonic device, in Vltrasonic device, pulsed adds oxygenant simultaneously, and described oxygenant is the mixing solutions of hydrogen peroxide and potassium hydroxide, wherein, the mass values of hydrogen peroxide and potassium hydroxide is 3:1; Sewage is 1-20 second in the residence time of Vltrasonic device;
Step 6, flocculation reaction: the sewage from step 5 is introduced flocculation basin, and add composite flocculation agent, described composite flocculation agent comprises poly-aluminum calcium chloride, iron(ic) chloride, polyacrylamide, citric acid, polyferric chloride, wilkinite and water; Preferably, in composite flocculation agent according to weighing scale: poly-aluminum calcium chloride: iron(ic) chloride: polyacrylamide: citric acid: polyferric chloride: wilkinite: 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, absorption reaction: sewage step 6 processed is introduced in pulverized coal dregs ash treating pond, Xiang Chizhong drops into pulverized coal dregs ash adsorbent and carries out adsorption treatment to sewage, and fly ash absorbent adds weight and sewage part by weight at 1-1.5:80-90, and the treatment time is 1-2 days;
Pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid mix according to part by weight 40:10:20:10 by the preparation method of described pulverized coal dregs ash adsorbent, then add water and are prepared into 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, be then cooled to room temperature, obtain pulverized coal dregs ash adsorbent;
Step 8, filtering and impurity removing: sewage step 7 processed uses film filter to carry out filtration treatment;
Step 9, sterilising treatment: sewage step 8 obtained introduces sterilising plant, and described sterilising plant includes waterpipe, sterilizing pond, chlorine dioxide generator and outlet conduit; The water that outlet conduit flows out is the product water after process.
In the present invention, by carrying out sewage collecting, asphalt felt absorption, oily water separation, oil removal by air bubbling, ultrasonic oxidation, flocculation reaction, absorption reaction, filtering and impurity removing, sterilising treatment 9 step process successively to oily(waste)water, haline water body can be processed fast, removal efficiency is high, stable effluent quality, pollutent is removed substantially, can meet the requirement of middle water.Method of the present invention has significant Saving in time costs, can process polluted-water rapidly, avoids the expansion of the pollution range of oil.Use the sewage after asphalt felt, air supporting, oxide treatment to be substantially devoid of oil pollutant, after using flocculation, adsorption treatment, the metal ion during sewage converges is removed substantially, reaches the requirement of middle water after filtering and impurity removing, sterilising treatment.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated.
embodiment 1
The method (wherein oily(waste)water salt massfraction is 1.5%) of a kind of quick removal Oil in Sewage Water dirt, comprises the following steps.
Step 1, sewage collecting: used by oily(waste)water pump delivery to emergent water collecting basin, leaves standstill stable until the sewage in emergent water collecting basin and after layering, uses oil pump to take upper oil phase away.The equipment that this step is used and operation are prior art, belong to known category, are not repeated at this.
Step 2, asphalt felt adsorb: asphalt felt is laid in step 1 process after the sewage water surface on, utilize asphalt felt to adsorb the oil in sewage, described asphalt felt is polypropylene fibre asphalt felt.
Step 3, oily water separation: the sewage after step 2 being processed passes in water-and-oil separator and carries out oily water separation.
Step 4, oil removal by air bubbling: the sump pump after step 3 being processed is delivered in air-floating apparatus, carries out air-flotation process, in order to remove in sewage with the insoluble impurities suspended, emulsification form exists.
Step 5, ultrasonic oxidation, the series flow of sewage after step 4 being processed crosses Vltrasonic device, in Vltrasonic device, add oxygenant continuously simultaneously, described oxygenant is the mixing solutions 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 residence time 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 ultra-sonic generator with tank, and described ultra-sonic generator converts the mechanical oscillation of same frequency to by the piezoelectric inverse effect of transverter, and with the radiation in the liquid of tank of the form of ultrasonic frequency compressional wave.
Step 6, flocculation reaction: the sewage from step 5 is introduced flocculation basin, and add composite flocculation agent, described composite flocculation agent comprises poly-aluminum calcium chloride, iron(ic) chloride, polyacrylamide, citric acid, polyferric chloride, wilkinite and water; Wherein, in composite flocculation agent according to weighing scale: poly-aluminum calcium chloride: iron(ic) chloride: polyacrylamide: citric acid: polyferric chloride: wilkinite: the ratio of water is 1:0.8:1:0.1:0.1:1:500.After abundant mixing, the flocculating settling time is 10 minutes, then filters.
Step 7, absorption reaction: sewage after step 6 being processed is introduced in pulverized coal dregs ash treating pond, and Xiang Chizhong drops into pulverized coal dregs ash adsorbent and carries out adsorption treatment to sewage, fly ash absorbent adds weight and sewage part by weight at 1:90, and the treatment time is 8h.
Pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid mix according to part by weight 40:10:20:10 by the preparation method of described pulverized coal dregs ash adsorbent, then add water and are prepared into 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, be then cooled to room temperature, obtain pulverized coal dregs ash adsorbent.
Step 8, filtering and impurity removing: the sewage after step 7 being processed 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 3m
3/ min.
Filter membrane is that filtering layer is very thin as its constructional feature of filter elements, and 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 the easy restorability of back flushing.If but contain oil in water, then be easy to blocking and not easily backwash, i.e. membrane pollution problem: due to the unstable of oil droplet, the oil droplet being greater than fenestra is not necessarily screened out, because the oil droplet that is less than fenestra may be split into and pass through fenestra, although they can pass film itself, large oil droplet can be agglomerated into and by the micro-porous adsorption of supporting layer in supporting layer, and cannot desorption.Therefore, oily(waste)water can form blocking to film filter, and backwash is difficult.After step 1 ~ 7 are filtered, the oil in oily(waste)water large portion is removed, and oleaginousness is reduced to 19mg/L by initial 3900mg/L, now carries out filtration again and can extend membrane life greatly.
Step 9, sterilising treatment: the sewage that step 8 obtained introduces sterilising plant, described sterilising plant comprises water inlet pipe that chlorine dioxide generator and pipeline order be connected, sterilizing pond and outlet conduit, and chlorine dioxide generator is connected with sterilizing pond pipeline; The water that outlet conduit flows out is the product water after process.
Wherein said water-and-oil separator main operational principle is that applied fluid mechanics is theoretical, in the moment that oily(waste)water large discharge uninterrupted synchronous (profit is synchronized namely relatively turbulent) flows through, oil droplet is by kinetic energy during sewage flow at high speed, continuous collision, change from small to big, accelerated motion thus, makes the oil of different specific weight with moisture flow, layering and is separated, finally realizing the object of oily water separation; Described air-floating apparatus is the equipment of a kind of suspended solid removed in various industry and municipal wastewater, grease and various jelly.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 sterilising plant is optimized choice in the present embodiment, also can choose other Water Disinfection equipment, as Denmark DCW Water Disinfection disinfection equipment, in its unit, comprise hypochlorous acid producer.
embodiment 2
The method (wherein oily(waste)water is seawater) of a kind of quick removal Oil in Sewage Water dirt, comprises the following steps.
Step 1, sewage collecting: used by oily(waste)water pump delivery to emergent water collecting basin, leaves standstill stable until the sewage in emergent water collecting basin and after layering, uses oil pump to take upper oil phase away.
Step 2, asphalt felt adsorb: asphalt felt is laid in step 1 process after the sewage water surface on, utilize 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 by the polypropylene of 30 weight parts in the tetrahydrofuran (THF) of 300 weight parts, stir 8h at 60 DEG C, obtain polypropylene solution; The polymethylmethacrylate of 25 weight parts is dissolved in the N,N-DIMETHYLACETAMIDE of 300 weight parts, stirs 2h at 50 DEG C, obtain polymethyl methacrylate solution; By polypropylene solution and the mixing of polymethyl methacrylate solution equal-volume, at room temperature stir 60min; Afterwards the mixing solutions of acquisition is put into the stainless steel spray fiber tube of electrospinning device, stainless steel spray fiber tube head internal diameter is 2mm, with aluminium cover for anode, aluminium foil is that negative electrode receives product as dash receiver, two pole distances are 20cm, it is 20KV that two interpolars apply voltage, carries out Electrospun, obtains polypropylene nano fiber; Perfluorododecyl trichlorosilane is sprayed on the polypropylene fibre of acquisition, oleophylic modification is carried out to it; 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 absorption leakage liquid flows to oil absorbent material, effectively prevent the diffusion of leakage, product is reusable after strand, extruding, can reclaim the leakage fluid of 72%-90%.The advantage of this material in addition fire-retardant, do not produce dust, without advantages such as storage clipping times.
Step 3, oily water separation: the sewage after step 2 being processed passes in water-and-oil separator and carries out oily water separation.
Step 4, oil removal by air bubbling: the sump pump after step 3 being processed is delivered in air-floating apparatus, carries out air-flotation process, removes in sewage with the insoluble impurities suspended, emulsification form exists.
Step 5, ultrasonic oxidation: the series flow of sewage after step 4 being processed crosses Vltrasonic device, in Vltrasonic device, add oxygenant continuously, described oxygenant is the mixing solutions of hydrogen peroxide and potassium hydroxide simultaneously, wherein, the mass values of hydrogen peroxide and potassium hydroxide is 3:1; Sewage is 20 seconds in the residence time 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 is introduced flocculation basin, and add composite flocculation agent, described composite flocculation agent comprises poly-aluminum calcium chloride, iron(ic) chloride, polyacrylamide, citric acid, polyferric chloride, wilkinite and water; Wherein, in composite flocculation agent according to weighing scale: poly-aluminum calcium chloride: iron(ic) chloride: polyacrylamide: citric acid: polyferric chloride: wilkinite: the ratio of water is 1:0.9:2:2:0.4:4:1000.
Step 7, absorption reaction: sewage after step 6 being processed is introduced in pulverized coal dregs ash treating pond, and Xiang Chizhong drops into pulverized coal dregs ash adsorbent and carries out adsorption treatment to sewage, fly ash absorbent adds weight and sewage part by weight at 1.5:80, and the treatment time is 11h; Pulverized coal dregs ash, kaolin, sesbania powder and phosphoric acid mix according to part by weight 40:10:20:10 by the preparation method of described pulverized coal dregs ash adsorbent, then add water and are prepared into 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, be then cooled to room temperature, obtain pulverized coal dregs ash adsorbent.
Step 8, filtering and impurity removing: the sewage after step 7 being processed 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 3m
3/ min.
Step 9, sterilising treatment: sewage step 8 obtained introduces sterilising plant, described sterilising plant comprises water inlet pipe that pipeline order that hypochlorous acid producer and pipeline order be connected is connected, sterilizing pond and outlet conduit, and hypochlorous acid producer is connected with sterilizing pond pipeline; The water that outlet conduit flows out is the product water after process.The sterilising plant applied is specifically as follows Denmark DCW Water Disinfection sterilizing unit.
Test the result that above-described embodiment 1,2 processes, data are as shown in table 1.Table 1:
| Water-quality guideline | Unit | Before process | Embodiment 1 | Embodiment 2 |
| Oleaginousness | mg/L | 3900 | 19 | 17 |
| Intestinal bacteria | Cfu/ml | 3.5*10 6 | 0 | 1 |
| COD | mg/L | 2000 | 30 | 35 |
A kind of high salt of prior art or seawater greasy dirt organic chemical waste water treatment process are all generally that the biochemical mode merely applying mechanically process sanitary wastewater processes described waste water, its discharge water can only reach three grades of emission standards, the i.e. COD<500mg/L of discharge water, and this method of wastewater treatment does not have deep purifying reuse and emergency handling function.The present invention has emergency handling function, is applicable to the paroxysmal oil pollution in harbour, such as, reveals.Method of the present invention has significant Saving in time costs, within the 12 hours emergent oil pollution time of generation, can process polluted-water; Stable effluent quality of the present invention, the COD of the water after process can stablize lower than 50 mg/L, reaches first discharge standard.
According to method of the present invention, for the sewage being subject to oil pollution, first sewage is collected, asphalt felt is used to absorb afterwards, preliminary treatment is carried out to sewage, then carry out oily water separation, to be separated oil remaining in sewage further, make oil-contg be reduced to the concentration can carrying out deep oxidation process.Deep oxidation process comprises oil removal by air bubbling and ultrasonic oxidation two operations, and wherein the former oxygenolysis 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 afterwards the mode of filtration remove before reaction in particulate matter, finally carry out sterilising treatment, reach stable, nontoxic effluent quality.Connecting each other before and after step of the present invention, is on the basis of rear step in front step, is the further process in front step in rear step, and order can not be put upside down, and only according to method of the present invention, just can reach quick, efficient, the stable effect of disposing of sewage.
Although above-described embodiment is to invention has been detailed description; but it is only the present invention's part embodiment; instead of whole embodiment, people can also obtain other embodiments according to the present embodiment under without creative prerequisite, and these embodiments all belong to protection scope of the present invention.
Claims (3)
1. remove a method for Oil in Sewage Water dirt fast, it is characterized in that, its treatment step is:
Step 1, sewage collecting: used by oily(waste)water pump delivery to emergent water collecting basin, leaves standstill stable until the sewage in emergent water collecting basin and after layering, uses oil pump to take upper oil phase away;
Step 2, asphalt felt adsorb: asphalt felt is laid in step 1 process after sewage face on, utilize asphalt felt to adsorb the oil in sewage;
Step 3, oily water separation: the sewage after step 2 being processed passes in water-and-oil separator and carries out oily water separation;
Step 4, oil removal by air bubbling: the sump pump after step 3 being processed is delivered in air-floating apparatus, carries out air-flotation process;
Step 5, ultrasonic oxidation: the series flow of sewage after step 4 being processed crosses Vltrasonic device, in Vltrasonic device, add oxygenant, sewage is 10-20 second in the residence time of Vltrasonic device simultaneously; Described oxygenant is the mixing solutions of hydrogen peroxide and potassium hydroxide;
Step 6, flocculation reaction: the sewage from step 5 is introduced flocculation basin, adds flocculation agent;
Step 7, absorption reaction: sewage step 6 processed is introduced in pulverized coal dregs ash treating pond, Xiang Chizhong drops into pulverized coal dregs ash adsorbent and carries out adsorption treatment to sewage, and fly ash absorbent adds weight and sewage part by weight at 1-1.5:80-90, treatment time 8 ~ 11h;
Step 8, filtering and impurity removing: sewage step 7 processed uses film filter to carry out filtration treatment;
Step 9, sterilising treatment: sewage step 8 obtained introduces sterilising plant, the water that described sterilising plant outlet conduit flows out is the product water after process.
2. method according to claim 1, is characterized in that: in described step 5, the mass values of hydrogen peroxide and potassium hydroxide is 3:1.
3. method according to claim 1, is characterized in that: described flocculation agent is composite flocculation agent, comprises poly-aluminum calcium chloride, iron(ic) chloride, polyacrylamide, citric acid, polyferric chloride, wilkinite and water.
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| CN106007091A (en) * | 2016-07-12 | 2016-10-12 | 韩德玉 | Treatment method for oily sewage |
| 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 |
| 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 |
| 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 |
| CN107473532A (en) * | 2017-10-02 | 2017-12-15 | 毛强平 | A kind of processing method and processing device of emulsifying liquid waste water |
| CN107954556A (en) * | 2016-01-14 | 2018-04-24 | 张作玮 | A kind of food and drink waste water oil removal treatment system |
| CN108706736A (en) * | 2018-06-05 | 2018-10-26 | 中国科学院南京地理与湖泊研究所 | A kind of ecological restoring method of eutrophic water body incense ashes soil deposit |
| CN108726778A (en) * | 2018-06-13 | 2018-11-02 | 昌邑市龙港无机硅有限公司 | A kind of inorganic silicon wastewater utilization method |
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| 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 |
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| CN107954556A (en) * | 2016-01-14 | 2018-04-24 | 张作玮 | A kind of food and drink waste water oil removal treatment system |
| CN106007091A (en) * | 2016-07-12 | 2016-10-12 | 韩德玉 | Treatment method for oily sewage |
| 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 |
| 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 |
| 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 |
| CN107473532A (en) * | 2017-10-02 | 2017-12-15 | 毛强平 | A kind of processing method and processing device of emulsifying liquid waste water |
| CN108706736A (en) * | 2018-06-05 | 2018-10-26 | 中国科学院南京地理与湖泊研究所 | A kind of ecological restoring method of eutrophic water body incense ashes soil deposit |
| CN108726778A (en) * | 2018-06-13 | 2018-11-02 | 昌邑市龙港无机硅有限公司 | A kind of inorganic silicon wastewater utilization method |
| 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 |
| CN110156220A (en) * | 2019-07-03 | 2019-08-23 | 浙江海洋大学 | A kind of harbour oil spot treatment device |
| 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 |
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