CN102627378A - Oil field alkali-surfactant-polymer flooding oil extraction wastewater treatment method - Google Patents
Oil field alkali-surfactant-polymer flooding oil extraction wastewater treatment method Download PDFInfo
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- CN102627378A CN102627378A CN2012101231023A CN201210123102A CN102627378A CN 102627378 A CN102627378 A CN 102627378A CN 2012101231023 A CN2012101231023 A CN 2012101231023A CN 201210123102 A CN201210123102 A CN 201210123102A CN 102627378 A CN102627378 A CN 102627378A
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Abstract
The invention discloses an oil field alkali-surfactant-polymer flooding oil extraction wastewater treatment method, belonging to the field of oilfield wastewater treatment, and including the following steps of: (1) carrying out neutralization on alkali-surfactant-polymer flooding oil extraction wastewater to adjust ph thereof to neutrality with a ph value being about 7; (2) carrying out hydrolysis acidification to improve biodegradability; (3) carrying out contact oxidation process to remove oil and surfactant; (4) adding 0.1 g to 1 g (in terms of iron element) of an iron-containing solution to each liter of the alkali-surfactant-polymer flooding wastewater, mixing the resulting solution evenly, then adding 0.1 to 0.5 mL of industrial hydrogen peroxide, stirring the obtained solution for 3 to 30 minutes, putting the obtained solution to a flocculation sedimentation tank, stirring the resulting solution for 3 to 30 minutes, and then, adding 1 to 5 mg of polyacrylamide to each liter of water, and stirring the obtained solution for 3 to 30 minutes; and (5) carrying out belt-type dehydration on sludge after sedimentation in the sedimentation tank. The method provided in the invention is advantaged in high-quality effluent water, stable effect and high economical efficiency.
Description
Technical field
The present invention relates to a kind of method of handling alkaline surfactant polymer flooding oil-field wastewater, belong to technical field of sewage.
Background technology
The most of oil field of China has got into tertiary phase, and polymer flooding and ternary composite driving become most important tertiary oil recovery technology, obtains large-area popularization in a lot of oil fields at present.Along with the widespread use of polymer flooding, produced a large amount of polymkeric substance oil extraction waste waters.Ternary composite driving is to adopt tensio-active agent, alkali, polymkeric substance to cooperate to recover the oil.Drive the condition of water quality of oil extraction waste water with water filling and compare, ternary is driven oil extraction waste water, and not only oleaginousness is high, and contain that a large amount of polymkeric substance (is main with SEPIGEL 305) 700mg/L is above, about tensio-active agent 80mg/L, highly basic pH value is more than 10.The existence of polymkeric substance has increased the viscosity of sewage, strengthens water and takes oily ability, and particulate emulsifying stability such as oil droplet is strengthened, and has increased the difficulty of oily water separation.Compare single polymers and drive ternary composite driving waste water composition complicacy more, intractability is bigger, utilizes the conventional sewage treatment process of water drive to handle the water quality requirement that is difficult to reach the former stratum of re-injection again, is the important topic that China oil field needs to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to prior art, provides a kind of cost low, the method for high efficiency processing alkaline surfactant polymer flooding oil-field wastewater.
The present invention is directed to ternary composite driving waste water and be alkalescence, through adding acid it is neutralized in the pilot scale process; The Degradation that in biochemical system, makes full use of high-effective microorganism is removed tensio-active agent in a large number; Promote oily water separation; Utilize the microbial lytic SEPIGEL 305 simultaneously, utilize wherein nitrogenous source and a small amount of carbon source, significantly reduce the molecular weight of PAM; Thereby reduce viscosity, help follow-up dosing and handle; Physicochemical techniques adopts the Fenton process reaction, utilizes the structure of hydroxyl radical free radical oxidation destruction SEPIGEL 305, passes through the oxyhydroxide flocculation sediment suspended substance and the colloid of iron again.Water outlet is through post precipitation, reaches re-injection water quality standard (specific targets oil-containing≤20mg/L, SS≤20mg/L).
Treatment process of the present invention specifically may further comprise the steps:
(1) neutralization
In corrosion-resistant reaction tank, add acid to ternary composite driving waste water, stir, regulate pH value to 6～7;
(2) acidication
In hydrolysis acidification pool, built-in biological band filler adds the acidication bacterium in ternary composite driving waste water, and active bacteria concentration is more than 3g/L in the waste water, and hydraulic detention time is 5h;
(3) bio-contact oxidation
Biological contact oxidation pond built-in biological band filler, hydraulic detention time is 12h, GWR is 10～20: 1;
(4) Fenton oxidation
In every liter of ternary composite driving waste water, add 0.1g～1g (by ferro element) iron-containing liquor, mixing adds 0.1～0.5mL industry ydrogen peroxide 50 again; Stirred 3～30 minutes; Get into flocculation sedimentation tank then, every liter of waste water adds 1～5mg SEPIGEL 305 again, stirs 3～30 minutes;
(5) deposition
The waste water of flocculation flow to settling tank, hydraulic detention time 2～4h, and water outlet can reach the re-injection requirement.
If the water outlet of post precipitation is aeration 1～2 hour again, make that ferrous oxidation forms ferric hydroxide precipitate in the water, pass through silica sand and filtration with manganese sand again, but the optimization process effect further reduces the concentration of suspended substance and petroleum-type.
Waste water neutral medicament adopts industrial sulphuric acid or hydrochloric acid.
Hydrolysis acidification pool and contact-oxidation pool adopt pulling flow type multiple-stage treatment mode, can improve treatment effect.
Biological contact oxidation pond employing Pyatyi, aeration mode adopts the blast aeration of rubber disc mesopore, and the acidication water outlet is flowed into by the contact-oxidation pool bottom, forms adverse current with aeration gas flow, and increase gas, water engaging surface amass.
The mud that deposition forms adopts belt to filter.
The inventive method has been accomplished the pilot scale plant of 5 tons of/day scales, reaches water through relevant departments' detection water outlet and wants the requirement of re-injection water.
The inventive method has following characteristics and beneficial effect:
1, operational path mainly is that biochemical treatment+materialization is handled, and biochemical unitary core process is acidication+bio-contact oxidation, the Robert Collier bacterium powder and the ontozone of bright company of supporting again use section; Utilize the high-specific surface area and the biological adsorptivity that is prone to of ontozone, in biochemical system, keep fairly large living weight, the Degradation that makes full use of high-effective microorganism in the microbial film is removed tensio-active agent in a large number; Promote oily water separation; Utilize the microbial lytic SEPIGEL 305 simultaneously, utilize wherein nitrogenous source and a small amount of carbon source, significantly reduce the molecular weight of PAM; Thereby reduce viscosity, help follow-up dosing and handle.
2, physicochemical techniques adopts the Fenton process reaction, utilizes the structure of hydroxyl radical free radical oxidation destruction SEPIGEL 305, passes through the oxyhydroxide flocculation sediment suspended substance and the colloid of iron again.Use indexs such as water suspension and oleaginousness and reach the re-injection water quality standard.The physicochemical techniques controlled variable has originality, and precipitated outlet water has as clear as crystal.
3, the job facilities investment is low, and facility is conventional, is merely 67% of existing physicochemical techniques gross investment.
4, working cost is low, and medicament is conventional chemical, need not prop up the medicament expense of paying heavy price, and the electricity charge consume low.
5, operational management is simple, and is workable.
Description of drawings
Shown in Figure 1 is the inventive method schema.
Shown in Figure 2 is the water quality optimizing schema.
Embodiment
Embodiment 1
Certain oil field unit compound petroleum driving and recovering waste water pilot scale is on-the-spot, flooding velocity 0.12m
3/ h adds sulfuric acid by above technology and is neutralized to pH value 6.0, stops 5 hours and Aerobic Pond aeration 24h through KIC (Robert Collier) hydrolysis acidification pool, and water outlet viscosity greatly reduces, and tensio-active agent reduces, and oleaginousness greatly reduces.Follow-up again through the Fenton dosing, add the iron-containing liquor pipeline mixing of 0.35g/L, add industrial ydrogen peroxide 50 0.8mL/L again and stir; 70 rev/mins of stirring velocitys; Churning time 20 minutes adds the 5mg/L polyacrylamide solution again and impels big easy the to be heavy flco of generation, stirs 10 minutes; 20 rev/mins of rotating speeds, the flco of production is through 2h flat flow deposition.
Technology in the by specification is carried out pilot scale, does not have follow-up filtration process, and treatment effect is also fine, and the pilot process Inlet and outlet water has been carried out sampling analysis, and the result sees the following form.
Embodiment 2
Certain oil field unit compound petroleum driving and recovering waste water pilot scale is on-the-spot, flooding velocity 0.12m
3/ h adds sulfuric acid by above technology and is neutralized to pH value 6.5, stops 5 hours and Aerobic Pond aeration 24h through the KIC hydrolysis acidification pool, and water outlet viscosity greatly reduces, and tensio-active agent reduces, and oleaginousness greatly reduces.Follow-up again through the Fenton dosing, add the iron-containing liquor pipeline mixing of 0.4g/L, add industrial ydrogen peroxide 50 0.4mL/L again and stir; 90 rev/mins of stirring velocitys, churning time 15 minutes adds the 4mg/L polyacrylamide solution again and impels big easy the to be heavy flco of generation; Stirred 10 minutes, 20 rev/mins of rotating speeds, the flco of production is through 2h flat flow deposition; Clear liquid gets into aeration tank 1h, passes through quartz sand filtration device and filtration with manganese sand device through the filtering velocity of 8m/h again.
After taking above art breading, the result is following, reaches the injection water quality standard, and water conditioning.The present embodiment result is as shown in the table.
Claims (6)
1. a method of handling alkaline surfactant polymer flooding oil-field wastewater is characterized in that, comprises the steps:
(1) neutralization
In corrosion-resistant reaction tank, add acid to ternary composite driving waste water, stir, regulate pH value to 6～7;
(2) acidication
In hydrolysis acidification pool, built-in biological band filler adds the acidication bacterium in ternary composite driving waste water, and active bacteria concentration is more than 3 g/L in the waste water, and hydraulic detention time is 5h;
(3) bio-contact oxidation
Biological contact oxidation pond built-in biological band filler, hydraulic detention time is 12h, GWR is 10 ~ 20:1;
(4) Fenton oxidation
In every liter of ternary composite driving waste water, add 0.1g ~ 1.0 g (by ferro element) iron-containing liquor, mixing adds 0.1 ~ 0.5mL industry ydrogen peroxide 50 again; Stirred 3 ~ 30 minutes; Get into flocculation sedimentation tank then, every liter of waste water adds 1 ~ 5mg SEPIGEL 305 again, stirs 3 ~ 30 minutes;
(5) deposition
The waste water of flocculation flow to settling tank, hydraulic detention time 2～4h.
2. method according to claim 1 is characterized in that, also comprises the steps: the water outlet aeration 1～2 hour of post precipitation, makes that ferrous oxidation forms ferric hydroxide precipitate in the water, passes through silica sand and filtration with manganese sand again.
3. method according to claim 1 and 2 is characterized in that, waste water neutral medicament adopts industrial sulphuric acid or hydrochloric acid.
4. method according to claim 1 and 2 is characterized in that, hydrolysis acidification pool and contact-oxidation pool adopt pulling flow type multiple-stage treatment mode.
5. method according to claim 1 and 2 is characterized in that, biological contact oxidation pond adopts Pyatyi, and aeration mode adopts the blast aeration of rubber disc mesopore, and the acidication water outlet is flowed into by the contact-oxidation pool bottom, forms adverse current with aeration gas flow.
6. method according to claim 1 and 2 is characterized in that, in the Fenton oxidation, iron content element chemistry article are a kind of or compound samples among ferrous sulfate, ferric sulfate, the iron(ic)chloride.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073105A (en) * | 2013-02-28 | 2013-05-01 | 陈振选 | Method for removing hard biodegradable organic matters from sewage |
| CN103601334A (en) * | 2013-07-24 | 2014-02-26 | 冯明良 | Efficient treatment apparatus and method for sewage and wastewater |
| CN103693814A (en) * | 2013-12-26 | 2014-04-02 | 天津市工业微生物研究所 | Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate |
| CN104250056A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Processing method of tertiary oil recovery surfactant production sewage |
| CN105217885A (en) * | 2015-09-22 | 2016-01-06 | 张家港市格锐环境工程有限公司 | A kind for the treatment of system of dyeing and printing auxiliary factory effluent and treatment process |
| CN105236571A (en) * | 2015-10-26 | 2016-01-13 | 中国石油天然气股份有限公司 | Method for treating ASP flooding produced water by BESI biological process |
| CN105314796A (en) * | 2015-11-16 | 2016-02-10 | 克拉玛依市弘峰科技有限公司 | Oil field high-salinity and oil-bearing wastewater treatment technology |
| CN105419772A (en) * | 2015-12-25 | 2016-03-23 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Polyacrylamide polymer viscosity reducer |
| CN108409026A (en) * | 2017-11-13 | 2018-08-17 | 南开大学 | A kind of ternary composite driving oil field recovered water inner circulating aerating biological filtering tank treatment process |
| CN113185000A (en) * | 2021-05-14 | 2021-07-30 | 辽宁石油化工大学 | Degradation method of polyacrylamide/betaine in wastewater |
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| CN1579968A (en) * | 2004-05-19 | 2005-02-16 | 天津大学 | Integrated treating process of waste water extracted from gas well for reaching effluent standard |
| CN101108761A (en) * | 2006-07-18 | 2008-01-23 | 扬州大学 | Processing technique for oil-contaminated water and equipment thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103073105A (en) * | 2013-02-28 | 2013-05-01 | 陈振选 | Method for removing hard biodegradable organic matters from sewage |
| CN104250056B (en) * | 2013-06-28 | 2016-09-21 | 中国石油化工股份有限公司 | A kind of processing method of tertiary oil recovery surfactant production waste |
| CN104250056A (en) * | 2013-06-28 | 2014-12-31 | 中国石油化工股份有限公司 | Processing method of tertiary oil recovery surfactant production sewage |
| CN103601334B (en) * | 2013-07-24 | 2015-10-14 | 冯明良 | A kind of efficient treatment facility of stain disease and method |
| CN103601334A (en) * | 2013-07-24 | 2014-02-26 | 冯明良 | Efficient treatment apparatus and method for sewage and wastewater |
| CN103693814A (en) * | 2013-12-26 | 2014-04-02 | 天津市工业微生物研究所 | Method for treating tertiary oil recovery wastewater by combining efficient dominant bacteria and flocculent precipitate |
| CN105217885A (en) * | 2015-09-22 | 2016-01-06 | 张家港市格锐环境工程有限公司 | A kind for the treatment of system of dyeing and printing auxiliary factory effluent and treatment process |
| CN105236571A (en) * | 2015-10-26 | 2016-01-13 | 中国石油天然气股份有限公司 | Method for treating ASP flooding produced water by BESI biological process |
| CN105314796A (en) * | 2015-11-16 | 2016-02-10 | 克拉玛依市弘峰科技有限公司 | Oil field high-salinity and oil-bearing wastewater treatment technology |
| CN105419772A (en) * | 2015-12-25 | 2016-03-23 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | Polyacrylamide polymer viscosity reducer |
| CN105419772B (en) * | 2015-12-25 | 2018-09-18 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of thinner of polyacrylamide polymer |
| CN108409026A (en) * | 2017-11-13 | 2018-08-17 | 南开大学 | A kind of ternary composite driving oil field recovered water inner circulating aerating biological filtering tank treatment process |
| CN113185000A (en) * | 2021-05-14 | 2021-07-30 | 辽宁石油化工大学 | Degradation method of polyacrylamide/betaine in wastewater |
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Address after: Building B1, R & D building, zone B, C and D, Wuhan National biological industry base project, 666 Gaoxin Avenue, Donghu Development Zone, Wuhan City, Hubei Province, 430065 Patentee after: Junji Environmental Technology Co.,Ltd. Address before: Building B1, R & D building, zone B, C and D, Wuhan National biological industry base project, 666 Gaoxin Avenue, Donghu Development Zone, Wuhan City, Hubei Province, 430065 Patentee before: HUBEI JUNJI WATER TREATMENT Co.,Ltd. |
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Denomination of invention: A treatment method of oilfield ASP flooding oil production wastewater Effective date of registration: 20220211 Granted publication date: 20130710 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd. Wuhan branch Pledgor: Junji Environmental Technology Co.,Ltd. Registration number: Y2022420000037 |