CN1381410A - Process for treating and reclaiming polymer-contained sewage - Google Patents
Process for treating and reclaiming polymer-contained sewage Download PDFInfo
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- CN1381410A CN1381410A CN 02121095 CN02121095A CN1381410A CN 1381410 A CN1381410 A CN 1381410A CN 02121095 CN02121095 CN 02121095 CN 02121095 A CN02121095 A CN 02121095A CN 1381410 A CN1381410 A CN 1381410A
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- bearing waste
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Abstract
A process for deeply treating and reclaiming polymer-contained sewage incldues such steps as loading the said sewage in regulation pool, adding disinfectant; adsorbing 20-30% of suspended substance and bacteria, stage-1 membrane filtering to remove over 99% of suspended substance and bacteria, and filtrate out 80% of Ca2+ and Mg+2 ions, stage-2 membrane filtering to filtrate out 90% of Ca2+, Mg2+, K+ and Na+ ions, storing cleaned water 80%-85% in water tank, and using 15%-20% of concentrated liquid back for preparing polymer solution. Its advantages are high recovery rate of wate (72-81%), and no drainage.
Description
Technical field:
The present invention relates to a kind of water-treatment technology field in the recover petroleum process, belong to polymer-bearing waste-water advanced treatment and reuse technology.
Background technology:
Oil-contaminated water of oil field is come out by exploitation with crude oil from the stratum, and the waste water after gas-oil separation, dehydration promptly is oily(waste)water.Not only contain crude oil in this oily(waste)water, also dissolve into various salts, suspended substance, obnoxious flavour, organism and a large amount of suspended solids; In oil-gas gathering and transportation and treating processes, also mix the theory of evolution medicament sometimes.The way of handling has physico-chemical processes (as electrodialysis) and chemical oxidization method, coagulating sedimentation or air supporting and biological process.The general processing efficiency height of physico-chemical processes, but investment is big, and the processing costs height is suitable for the little water yield and handles; Chemical oxidization method has better treatment effect to bio-refractory waste water, need add a large amount of chemical agents but give prominence to when defective is processing, and expense is very high, is easy to generate secondary pollution; Biological process is comparatively reasonable, effective to treatment of Organic Wastewater, but it is also very difficult to only depend on this method that polymer-bearing waste-water in the oil production is handled.
Particularly polymer flooding is since field use, and Daqing oil field only, when the polymers soln that with clear water (salinity is 1000mg/L) preparation molecular weight is 1,800 ten thousand, soltion viscosity can reach 40～50mPa.s, (when salinity was 3000～5000mg/L) prepared polymer solutions, soltion viscosity can reach 16mPa.s and with oily(waste)water.The throwing huge fund clear water that salinity is low in oil field is used for field produces at present for this reason, also has to efflux a large amount of polymer-bearing waste-waters simultaneously, has caused the serious environmental pollution.Only the existing polymer-bearing waste-water treatment station of Daqing oil field is 15, annual polymer-bearing waste-water more than 5000 all places that generate, the oil that contains in the sewage, suspended substance, salinity and bacterium are the principal elements that influences prepared polymer viscosity, cause the part polymer-bearing waste-water to efflux, and have caused environmental pollution; Also caused simultaneously the simultaneous growth of a large amount of injections of clear water and a large amount of outputs of sewage.When being becoming tight along with water resources day, the not enough problem of clear water will directly perplex the production in oil field.Though adopt the water technology of " it is main body that hydrocyclone adds dual flow filter ", can remove the pollutent in the polymer-bearing waste-water preferably, polymer-bearing waste-water part re-injection utilization after the processing, another part also can only efflux, the contaminate environment phenomenon still exists, simultaneously also exist complex process, handled water quality and do not reach the requirement that effluxes.
Summary of the invention:
The objective of the invention is to overcome the deficiency of above-mentioned technology and a kind of polymer-bearing waste-water advanced treatment and reuse technology that can reduce the polymer-bearing waste-water salinity and eliminate environmental pollution be provided.
Adoptable technical scheme is: this polymer-bearing waste-water advanced treatment and reuse technology, comprise dosing, absorption, filtration, and it is characterized in that: carry out according to following steps,
A. dosing: in the sewage equalizing tank that polymer-bearing waste-water enters, add sterilant;
B. absorption: enter adsorption tower afterwards and carry out oil-absorbing resin absorption, dam 20%～30% suspended substance and bacterium;
C. one-level membrane filtration: below 5PPM, pass through the one-level membrane filtration again through the polymer-bearing waste-water water outlet oleaginousness of adsorb, degree of depth removal more than 99% suspended substance and bacterium and filter out 80% Ca
2+, Mg
2+Ion, water rate are that 90%～95%, 5%～10% concentrated solution returns and continues to filter, until going out water suspension at 1mg/L;
D. secondary membrane filtration:, filter out 90% Ca through going out water suspension through the secondary membrane filtration behind the one-level membrane filtration
2+, Mg
2+, K
+, Na
+Ion, water outlet yield are that 80%～85%, 15%～20% concentrated solution returns and continues to filter, until going out water salinity below 1000mg/L;
E. reuse: enter the clear water tank stores through the water outlet behind the secondary membrane filtration, total recovery is 72%～81%, squeezes into polymkeric substance injection allocation station and carries out prepared polymer solution.
Therefore this beneficial effect of the invention is: since this process using dispensing, absorption, secondary filtration until reuse, make the water quality standard that the polymer-bearing waste-water advanced treatment is crossed be better than clear water, oleaginousness drops to below the 0.2mg/L, suspended substance drops to below the 1.0mg/L, and salinity drops to below the 440mg/L from about 5430mg/L.This treated water prepared polymer of reuse, viscosity can reach 95mPa.s (viscosity with normal clear water prepared polymer is 60mPa.s), and the viscosity of the polymkeric substance that makes is constant substantially.Can save 1.1 yuan/ton of clear water costs, its obvious social benefit has been stopped the phenomenon of externally discharged waste water, has also stopped environmental pollution simultaneously.
Embodiment:
Below with the present invention is further illustrated:
This polymer-bearing waste-water advanced treatment and reuse technology comprise dosing, absorption, filtration, can carry out according to following steps:
The first, dosing: in the sewage equalizing tank that polymer-bearing waste-water enters, add sterilant, be used for regulating the water water yield, stabilizing water quality and dispensing sterilization;
The second, absorption: the sewage that sewage equalizing tank germicidal treatment is crossed is introduced adsorption tower and is carried out oil-absorbing resin absorption, finishes degree of depth oil removing, and oil removal rate is more than 99%, dam simultaneously 20%～30% suspended substance and bacterium;
The 3rd, the one-level membrane filtration: pass through the one-level membrane filtration again through the sewage water outlet oleaginousness of adsorbing below 5PPM, the degree of depth is removed suspended substance and the bacterium more than 99%, filters out 80% Ca
2+, Mg
2+Ion, water rate are that 90%～95%, 5%～10% concentrated solution returns and continues to filter, until going out water suspension at 1mg/L;
The 4th, secondary membrane filtration: pass through the secondary membrane filtration through the water suspension that goes out behind the one-level membrane filtration, filter out 90% Ca
2+, Mg
2+, K
+, Na
+Ion, water outlet yield are that 80%～85%, 15%～20% concentrated solution returns and continues to filter, until going out water salinity below 1000mg/L;
The 5th, reuse: enter the clear water tank stores through the water outlet behind the secondary membrane filtration, total recovery is 72%～81%, squeezes into polymkeric substance injection allocation station and carries out prepared polymer solution.
The polymer-bearing waste-water that uses this technology 3 sewage workss at the scene to handle carries out advanced treatment, and the processing water yield is 3m
3/ h, smooth running began to get former water sample and goes out water sample after one hour, and the result is compared with former water, polymer flooding obtain solution water water quality, saw as follows:
| Sequence number | Index | The 1st the water outlet data that the sewage works advanced treatment is crossed | The 2nd the water outlet data that the sewage works advanced treatment is crossed | The 3rd the water outlet data that the sewage works advanced treatment is crossed | Former water | Water supply standard |
| ??1 | Oil-containing | ????0.02 | ????0.15 | ????0.17 | ??3.1 | ??≤10 |
| ??2 | Suspension content | ????0.7 | ????0.6 | ????0.5 | ??14 | ??≤5.0 |
| ??3 | Contain P concentration | ????0.0 | ????0.0 | ????0.0 | ??10.2 | |
| ??4 | ??K +And Na + | ????44.5 | ????80 | ????130 | ??1630 | |
| ??5 | ??Ca 2+ | ????0.40 | ????1.80 | ????2.00 | ??26.0 | |
| ??6 | ??Mg 2+ | ????0.49 | ????1.20 | ????2.43 | ??8.99 | |
| ??7 | Iron level | ????0.05 | ????0.02 | ????0.00 | ??0.22 | ??≤0.5 |
| ??8 | ??CL - | ????25.93 | ????30 | ????35.4 | ??920 | |
| ??9 | ??SO 4 2- | ????＜0.10 | ????＜0.05 | ????0.00 | ??78.8 | |
| ??10 | ??HCO 3 - | ????51.8 | ????98 | ????126 | ??2770 | |
| ??11 | ??CO 3 2- | ????0.00 | ????0.00 | ????0.00 | ??0.00 | |
| ??12 | ??OH - | ????0.00 | ????0.00 | ????0.00 | ??0.00 | |
| ??13 | Total mineralization | ????124.2 | ????354 | ????435 | ??5430 | ??≤1000 |
| ??14 | Dissolved oxygen | ????0.5 | ????0.35 | ????0.4 | ??2.06 | ??≤0.5 |
| ??15 | Sulfide | ????0.15 | ????0.2 | ????0.23 | ??11.83 | ??≤10 |
| ??16 | Total plate count | ????0 | ????52 | ????64 | ??1440 | ??10000 |
Wherein: ion content unit is mg/L, and bacterium is individual/ml; Water supply standard is the saturating layer of a prepared polymer solution water water quality standard middle and high infiltration index.
As seen, with this technology polymer-bearing waste-water is handled, oleaginousness drops to below the 0.2mg/L, and suspended substance drops to below the 1.0mg/L, and salinity drops to below the 440mg/L from about 5430mg/L, and its water quality standard will be better than clear water far away.Use this treated water prepared polymer, viscosity can reach 95mPa.s (viscosity with normal clear water prepared polymer is 60mPa.s), and the viscosity of the polymkeric substance that makes is constant substantially.Can save 3.1 yuan/ton of clear water costs, its obvious social benefit has been stopped the phenomenon of externally discharged waste water, has also stopped environmental pollution simultaneously.
Claims (1)
1, a kind of polymer-bearing waste-water advanced treatment and reuse technology that relates in the recover petroleum process comprises dosing, absorption, filtration, it is characterized in that: carry out according to following steps,
A. dosing: in the sewage equalizing tank that polymer-bearing waste-water enters, add sterilant;
B. absorption: enter adsorption tower afterwards and carry out oil-absorbing resin absorption, dam 20%～30% suspended substance and bacterium;
C. one-level membrane filtration: below 5PPM, pass through the one-level membrane filtration again through the polymer-bearing waste-water water outlet oleaginousness of adsorb, degree of depth removal more than 99% suspended substance and bacterium and filter out 80% Ca
2+, Mg
2+Ion, water rate are that 90%～95%, 5%～10% concentrated solution returns and continues to filter, until going out water suspension at 1mg/L;
D. secondary membrane filtration:, filter out 90% Ca through going out water suspension through the secondary membrane filtration behind the one-level membrane filtration
2+, Mg
2+, K
+, Na
+Ion, water outlet yield are that 80%～85%, 15%～20% concentrated solution returns and continues to filter, until going out water salinity below 1000mg/L;
E. reuse: enter the clear water tank stores through the water outlet behind the secondary membrane filtration, total recovery is 72%～81%, squeezes into polymkeric substance injection allocation station and carries out prepared polymer solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121095 CN1381410A (en) | 2002-06-03 | 2002-06-03 | Process for treating and reclaiming polymer-contained sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02121095 CN1381410A (en) | 2002-06-03 | 2002-06-03 | Process for treating and reclaiming polymer-contained sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1381410A true CN1381410A (en) | 2002-11-27 |
Family
ID=4744869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02121095 Pending CN1381410A (en) | 2002-06-03 | 2002-06-03 | Process for treating and reclaiming polymer-contained sewage |
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|---|---|
| CN (1) | CN1381410A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300017C (en) * | 2005-04-14 | 2007-02-14 | 哈尔滨工业大学 | Tech. process for reducing mineralization of extracting oil sewage |
| CN103112977A (en) * | 2013-02-26 | 2013-05-22 | 杭州广联新能源科技有限公司 | Method for recycling injection polymers by polymer-containing sewage advanced treatment |
| CN109019994A (en) * | 2018-09-30 | 2018-12-18 | 中石化节能环保工程科技有限公司 | A kind of oil field injection allocation sewage treatment process |
-
2002
- 2002-06-03 CN CN 02121095 patent/CN1381410A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300017C (en) * | 2005-04-14 | 2007-02-14 | 哈尔滨工业大学 | Tech. process for reducing mineralization of extracting oil sewage |
| CN103112977A (en) * | 2013-02-26 | 2013-05-22 | 杭州广联新能源科技有限公司 | Method for recycling injection polymers by polymer-containing sewage advanced treatment |
| CN103112977B (en) * | 2013-02-26 | 2015-04-01 | 杭州广联新能源科技有限公司 | Method for recycling injection polymers by polymer-containing sewage advanced treatment |
| CN109019994A (en) * | 2018-09-30 | 2018-12-18 | 中石化节能环保工程科技有限公司 | A kind of oil field injection allocation sewage treatment process |
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