CN105645650A - Method for efficiently and rapidly reducing viscosity of polymers in oil field polymer-bearing wastewater and ternary composite flooding water - Google Patents
Method for efficiently and rapidly reducing viscosity of polymers in oil field polymer-bearing wastewater and ternary composite flooding water Download PDFInfo
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- CN105645650A CN105645650A CN201511029097.XA CN201511029097A CN105645650A CN 105645650 A CN105645650 A CN 105645650A CN 201511029097 A CN201511029097 A CN 201511029097A CN 105645650 A CN105645650 A CN 105645650A
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- 229920000642 polymer Polymers 0.000 title claims abstract description 188
- 239000002351 wastewater Substances 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims abstract description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000011206 ternary composite Substances 0.000 title claims abstract description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 104
- 239000011780 sodium chloride Substances 0.000 claims abstract description 52
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 25
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 34
- 239000010865 sewage Substances 0.000 claims description 28
- 238000003809 water extraction Methods 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 35
- 239000000243 solution Substances 0.000 description 27
- 229920002401 polyacrylamide Polymers 0.000 description 13
- 230000007423 decrease Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 9
- 239000003814 drug Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 7
- 238000006731 degradation reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000008216 herbs Nutrition 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/722—Oxidation by peroxides
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/09—Viscosity
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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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for efficiently and rapidly reducing viscosity of polymers in oil field polymer-bearing wastewater and ternary composite flooding water, relates to a method for rapidly reducing viscosity of polymers in water, and aims to solve the problems of high energy consumption, need of a large amount of agent and difficulty in treatment caused by high rejection pressure since the polymer-bearing wastewater and the ternary composite flooding water have high viscosity in the prior art. The method comprises the following steps: I, introducing the polymer-bearing wastewater into a reactor embedded with an ultraviolet lamp tube, and introducing ozone; II, adding an H2O2 solution into the polymer-bearing wastewater for reacting with stirring to obtain polymer-bearing wastewater of which the viscosity is less than 0.2E.Pa.s; III, adding sodium chloride powder into the polymer-bearing wastewater to obtain a polymer-bearing wastewater solution of which the viscosity is less than 0.2E.Pa.s. The method is applied to the field of rapid viscosity reduction of polymers in wastewater.
Description
Technical field
The present invention relates to the method that the fast prompt drop of polymer in water is glutinous, particularly to the method that the fast prompt drop of polymer in a kind of efficient polymer-containing sewage in oil field, tri compound expelling water is glutinous.
Background technology
Oil is as the non-renewable resources of a kind of preciousness, in commercial production worldwide, in occupation of irreplaceable position. But, in various mineral resources, oil exploitation has exploitation difficulty, the feature that coefficient of mining is low, therefore in the oil exploitation process of various countries, how to improve the problem that recovery ratio is people's general concern.
Along with the lengthening of the exploitation time limit, most oil fields of China come into High water cut mining phase, gradually by primary oil recovery, secondary phase of oil production progressively to tertiary phase transition. In tertiary oil recovery technology, drive using chemical agent as the polymer flooding and ternary that drive the means of adopting and be most widely used. Polyacrylamide (HPAM) because of its there is molecular weight height, good water solubility, viscosity advantages of higher are regarded as the first-selected polymer of polymer displacement of reservoir oil. Viscosity and the viscoelasticity of aggressiveness system joined by polyacrylamide by increasing, it is possible to decrease mobility ratio between displacing fluid and crude oil, improves the sweep area of oil displacement system, and then improves recovery ratio.
But, ground surface works, while produce raising recovery ratio for oil field, is also created suitable ill effect by polyacrylamide. As the polyacrylamide driving agent of gathering medicinal herbs and being injected into underground, long-term after the environment of underground High Temperature High Pressure with the form of hydrolyzed polyacrylamide with Produced Liquid extraction, although molecular weight and viscosity all decline to a great extent, but compared with conventional common oily waste water treatment, the process of polymer-bearing waste-water is more difficult. A. polyacrylamide makes the viscosity of recovered water be multiplied so that in polymer-bearing waste-water, the stability of colloidal solid strengthens, and the content of float is higher, extends the time of natural subsidence; B. polyacrylamide adds the emulsifying capacity of crude oil, makes oil-water separation become more difficult, adds the oil content of recovered water;C. the increase of polymer-bearing waste-water viscosity makes the intractability of the techniques such as sedimentation, filtration, flocculation in follow-up produced water treatment, adds medicament and puts into, filtration system is damaged. The principal element causing polymer-bearing waste-water difficult treatment is exactly that polymer makes recovered water viscosity increase, thus, to need a kind of Technology that can quickly reduce polymer-bearing waste-water viscosity badly, and this technique has both instant effect, technique is simple, puts into the advantages such as little.
China, in polymer-bearing waste-water process, has carried out and has studied more widely. The polyacrylamide adopted in polymer displacement of reservoir oil tech has the plurality of advantages such as big, the good water solubility of molecular weight. While improving oil recovery rate, bring ill effect for oilfield surface engineering. Polymer-containing sewage in oil field reinjection into reservoir and to adopt that liquid reuses be reasonable utilization ways as driving for prepared polymer again after treatment. But, polymer-bearing waste-water and ternary composite flooding water extraction have the shortcomings such as viscosity is high, reinjection into reservoir or when being used for prepared polymer, on the one hand re-injection pressure causes greatly higher energy consumption, on the other hand owing to driving, when the existence of mineral element affects and again joins poly-, the viscosity adopting liquid. In conventional research, mainly it is degraded to final process target with polyacrylamide, it is necessary to adding a large amount of medicament, processing procedure is also more difficult, proposes a kind of method for the quick viscosity reduction of polyacrylamide in polymer-bearing waste-water. For this present Research, the present invention proposes the method for the quick viscosity reduction of polyacrylamide in polymer-bearing waste-water,
Summary of the invention
The invention aims to solution prior art polymer-bearing waste-water and ternary composite flooding water extraction has viscosity height and causes that re-injection pressure causes greatly higher energy consumption, need to add a large amount of medicament, the problem that processing procedure is also more difficult, and the method that in a kind of efficient polymer-containing sewage in oil field proposed, tri compound expelling water, the fast prompt drop of polymer is glutinous.
Above-mentioned goal of the invention is achieved through the following technical solutions:
Step one, utilize ozone-ultraviolet group technology polymer-contained sewage, after polymer-bearing waste-water is passed into, with flow velocity 1��5m/s, the reactor that inside is embedded with ultraviolet lamp tube, pass into the viscosity of polymer-bearing waste-water after ozone 20min��30min that concentration is 33.3mg/L��40mg/L in the reactor, less than 0.2E.Pa.s, to stop operation; Wherein, it is 254nm that the ultraviolet lamp tube of reactor launches wavelength, and power is 40w; Polymer-bearing waste-water is the polymer-containing sewage in oil field containing polymer or the ternary composite flooding water extraction containing polymer; Polymer is the poly-propionic acid amide. of oil field dedicated water soluble macromolecular;
Step 2, hydrogen peroxide process; Adopting concentration is the H of 60%2O2Solution joins in polymer-bearing waste-water after stirring reaction 20��30min, utilizes viscosimeter to measure the viscosity of polymer-bearing waste-water; If the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s; Then stop operation; If the viscosity of polymer-bearing waste-water is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds the H of 60%2O2Solution 0.5��2ml, so that the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s; Wherein, H is added2O2The H in polymer-bearing waste-water after solution2O2The concentration of solution is 1��5ml/L;
Step 3, sodium chloride process; Sodium chloride powder is joined in polymer-bearing waste-water, obtain the polymer-bearing waste-water solution 1 after adding sodium chloride, if polymer-bearing waste-water solution 1 viscosity is less than 0.2E.Pa.s, then stop operation; If polymer-bearing waste-water solution 1 viscosity is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds sodium chloride powder, obtain the polymer-bearing waste-water solution 2 after adding sodium chloride, so that the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s;
Wherein, the sodium chloride concentration added in the polymer-bearing waste-water solution 1 after sodium chloride is 5g/L��20g/L;
The sodium chloride concentration adding the polymer-bearing waste-water solution 2 after sodium chloride is 10g/L��30g/L.
Invention effect
The invention discloses the method that the fast prompt drop of polymer in a kind of polymer-containing sewage in oil field, ternary composite flooding water extraction is glutinous, belong to the invention in oil field wastewater treatment field, the present invention relates to a kind of polymer-bearing waste-water and the glutinous method of the fast prompt drop of ternary composite flooding water extraction and technique. Polyacrylamide (HPAM) is the first-selected polymer of polymer displacement of reservoir oil, but it is while improving recovery ratio, and also the process for recovered water proposes new challenge. HPAM is added significantly to viscosity and the emulsibility of mixed liquor, makes oil-water separation difficulty strengthen. The present invention proposes and adopts the fast prompt drop that the process of ozone-ultraviolet technique, hydrogen peroxide, sodium chloride process realize polymer-bearing waste-water to stick. It is simple that the process that the present invention proposes has method medicament, excellent effect, it is fast that glutinous speed drops, the advantage such as less costly, and this method provide three kinds and can make the polymer in polymer-bearing waste-water and ternary composite flooding water extraction can the method for quick viscosity reduction, there is viscosity reduction speed fast, easy to operate, medicament is simple, effect stability, the plurality of advantages such as operating cost is low, have application and promotional value in polymer-containing sewage in oil field processes.
For the problem of polymer viscosity reduction difficulty in oil field polymer-containing wastewater and ternary composite flooding water extraction, the invention provides ozone-ultraviolet group technology, hydrogen peroxide, the method for the quick viscosity reduction of polymer-containing wastewater that sodium chloride is three kinds different. The three kinds of methods provided in the present invention, it is possible to making polymer-containing wastewater is 33.3mg/L ozone and 40w, UV in throwing amount254nmUltraviolet, 5mM hydrogen peroxide, under the disposition of 500mg/L sodium chloride, the viscosity of on-the-spot actual water body is quickly reduced to 0.954mPa s by original 2.876mPa s, thus reaching the purpose of quick viscosity reduction, the method provided in the present invention have viscosity reduction rapidly, process easy, medicament is simple, throwing amount is low, the plurality of advantages such as viscosity reduction is rapid, the viscosity of polymer-bearing waste-water can be greatly reduced at short notice, be conducive to subsequent treatment and again with. Process for field polymers sewage and ternary composite flooding water extraction and provide new method and thinking, there is good application prospect and promotional value.
Accompanying drawing explanation
Fig. 1 embodiment ozone-ultraviolet processes the change schematic diagram of the viscosity of post-consumer polymer HPAM;
Fig. 2 embodiment ozone-ultraviolet processes the change schematic diagram of the concentration of post-consumer polymer HPAM;
The change schematic diagram of the viscosity of the polymer after the process of Fig. 3 embodiment hydrogen peroxide;
The change schematic diagram of the concentration of the polymer after the process of Fig. 4 embodiment hydrogen peroxide;
The change schematic diagram of the viscosity of the polymer after the process of Fig. 5 embodiment sodium chloride;
The change schematic diagram of the concentration of the polymer after the process of Fig. 6 embodiment sodium chloride;
Detailed description of the invention
Detailed description of the invention one: the method that in a kind of efficient polymer-containing sewage in oil field of present embodiment, tri compound expelling water, the fast prompt drop of polymer is glutinous, specifically prepares according to following steps:
Step one, utilize ozone-ultraviolet group technology polymer-contained sewage, after polymer-bearing waste-water is passed into, with flow velocity 1��5m/s, the reactor that inside is embedded with ultraviolet lamp tube, and pass into the viscosity of polymer-bearing waste-water after ozone 20min��30min that concentration is 33.3mg/L��40mg/L in the reactor and, less than 0.2E.Pa.s, stop operation the requirement realized the quick viscosity reduction of polymer-bearing waste-water; Wherein, it is 254nm that the ultraviolet lamp tube (China's Haining Yikang reaches Lighting Inc) of reactor launches wavelength, and power is 40w polymer-bearing waste-water is the polymer-containing sewage in oil field containing polymer or the ternary composite flooding water extraction containing polymer;Polymer is the poly-propionic acid amide. of oil field dedicated water soluble macromolecular;
Step 2, hydrogen peroxide process; Adopting concentration is the H of 60%2O2Solution joins in polymer-bearing waste-water after stirring reaction 20��30min, utilizes viscosimeter (flow graph-AR1500ex (Waters of the U.S.)) to measure the viscosity of polymer-bearing waste-water; If the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s; Then stop operation; If the viscosity of polymer-bearing waste-water is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds the H of 60%2O2Solution 0.5��2ml so that the viscosity of polymer-bearing waste-water less than 0.2E.Pa.s to reach the purpose of quick viscosity reduction; Wherein, H is added2O2The H in polymer-bearing waste-water after solution2O2The concentration of solution is 1��5ml/L;
Step 3, sodium chloride process; Sodium chloride powder is joined in polymer-bearing waste-water, obtain the polymer-bearing waste-water solution 1 after adding sodium chloride, if polymer-bearing waste-water solution 1 viscosity is less than 0.2E.Pa.s, then stop operation; If polymer-bearing waste-water solution 1 viscosity is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds sodium chloride powder, obtain the polymer-bearing waste-water solution 2 after adding sodium chloride; Make polymer-bearing waste-water solution 2 viscosity less than 0.2E.Pa.s
Wherein, the sodium chloride concentration added in the polymer-bearing waste-water solution 1 after sodium chloride is 5g/L��20g/L;
The sodium chloride concentration adding the polymer-bearing waste-water solution 2 after sodium chloride is 10g/L��30g/L;
The concentration 500mg/L of the polymer in polymer-bearing waste-water after sodium chloride process, viscosity clearance is 90%, and decrease in viscosity is to 0.2E.Pa.s, to reach the purpose of quick viscosity reduction.
Present embodiment effect:
Present embodiment discloses a kind of method that in polymer-containing sewage in oil field, ternary composite flooding water extraction, the fast prompt drop of polymer is glutinous, belonging to the invention in oil field wastewater treatment field, present embodiment relates to a kind of glutinous method of polymer-bearing waste-water and the fast prompt drop of ternary composite flooding water extraction and technique. Polyacrylamide (HPAM) is the first-selected polymer of polymer displacement of reservoir oil, but it is while improving recovery ratio, and also the process for recovered water proposes new challenge. HPAM is added significantly to viscosity and the emulsibility of mixed liquor, makes oil-water separation difficulty strengthen. Present embodiment proposes and adopts the fast prompt drop that the process of ozone-ultraviolet technique, hydrogen peroxide, sodium chloride process realize polymer-bearing waste-water to stick. It is simple that the process that present embodiment proposes has method medicament, excellent effect, it is fast that glutinous speed drops, the advantage such as less costly, and this method provide three kinds and can make the polymer in polymer-bearing waste-water and ternary composite flooding water extraction can the method for quick viscosity reduction, there is viscosity reduction speed fast, easy to operate, medicament is simple, effect stability, the plurality of advantages such as operating cost is low, have application and promotional value in polymer-containing sewage in oil field processes.
For the problem of polymer viscosity reduction difficulty in oil field polymer-containing wastewater and ternary composite flooding water extraction, present embodiments provide for ozone-ultraviolet group technology, hydrogen peroxide, the method for the quick viscosity reduction of polymer-containing wastewater that sodium chloride is three kinds different. The three kinds of methods provided in present embodiment, it is possible to making polymer-containing wastewater is 33.3mg/L ozone and 40w, UV in throwing amount254nmUltraviolet, 5mM hydrogen peroxide, under the disposition of 500mg/L sodium chloride, the viscosity of on-the-spot actual water body is quickly reduced to 0.954mPa s by original 2.876mPa s, thus reaching the purpose of quick viscosity reduction, the method provided in present embodiment have viscosity reduction rapidly, process easy, medicament is simple, throwing amount is low, the plurality of advantages such as viscosity reduction is rapid, the viscosity of polymer-bearing waste-water can be greatly reduced at short notice, be conducive to subsequent treatment and again with.Process for field polymers sewage and ternary composite flooding water extraction and provide new method and thinking, there is good application prospect and promotional value.
Detailed description of the invention two: present embodiment and detailed description of the invention one the difference is that: in step one, polymer-bearing waste-water is passed into inside with flow velocity 2��4m/s and is embedded with in the reactor of ultraviolet lamp tube. Other step and parameter and detailed description of the invention one are identical.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two the difference is that: step one passes into ozone 20min��25min that concentration is 35mg/L��38mg/L. Other step and parameter and detailed description of the invention one or two are identical.
Detailed description of the invention four: one of present embodiment and detailed description of the invention one to three the difference is that: step 2 adds H2O2The H in polymer-bearing waste-water after solution2O2The concentration of solution is 2��4ml/L. Other step and one of parameter and detailed description of the invention one to three are identical.
Detailed description of the invention five: one of present embodiment and detailed description of the invention one to four the difference is that: the sodium chloride concentration added in step 3 in the polymer-bearing waste-water solution 1 after sodium chloride is 5g/L��15g/L. Other step and one of parameter and detailed description of the invention one to four are identical.
Detailed description of the invention six: one of present embodiment and detailed description of the invention one to five the difference is that: the sodium chloride concentration adding the polymer-bearing waste-water solution 2 after sodium chloride in step 3 is 10g/L��20g/L. Other step and one of parameter and detailed description of the invention one to five are identical.
Adopt following example checking beneficial effects of the present invention:
Embodiment one:
The method that in a kind of efficient polymer-containing sewage in oil field of the present embodiment, tri compound expelling water, the fast prompt drop of polymer is glutinous, specifically prepares according to following steps:
Step one, utilize ozone-ultraviolet group technology polymer-contained sewage particularly as follows:
Take from Daqing oil field for the sewage containing HPAM of confirmatory experiment to recover the oil six factory's loudspeaker 400 water treatment stations. The sewage viscosity containing HPAM taken is about 2.875mPa S, HPAM content and is about about 338.5mg/L. Adopt ozone and the ultraviolet (254nm of 33.3mg/L, when 40w) it being processed, the viscosity of polymer-bearing waste-water quickly reduces, processing procedure medium viscosity at 10min is reduced to 1.573mPa S by 2.876mPa S, and to when processing 20min, viscosity is 1.114mPa S, the reduction amplitude of viscosity reaches 61.26%, in follow-up processing procedure, the reduction amplitude of viscosity is less, being therefore set as, 20min is as shown in Figure 1 the process time of ozone-ultraviolet;
When polymer-bearing waste-water is processed by the ozone of employing 33.3mg/L and ultraviolet (254nm, 40w), the HPAM content in polymer-bearing waste-water decreases, and degradation rate is from fast to slow. In the processing procedure of 10min, HPAM content is reduced to 264.2mg/L by 336.7mg/L. In follow-up processing procedure, HPAM content continuous decrease, to when processing 20min, the content of HPAM is 236.2mg/L, now, is 29.85% as shown in Figure 2 to the clearance of HPAM.
Step 2, hydrogen peroxide process particularly as follows:
Adopt the H of 200mM2O2When polymer-bearing waste-water is processed so that it is in polymer-bearing waste-water, concentration reaches 5mM. Adding H2O2After, the decrease in viscosity of polymer-bearing waste-water is very fast. Add H2O2After 10min, viscosity is reduced to 1.891mPa S by 2.883mPa S time initial, and in processing procedure, degradation rate progressively slows down. Add H2O2After 120min, viscosity is 0.972mPa S, and the degradation rate of viscosity is 66.29% such as Fig. 3.
Adopt the H of 200mM2O2When polymer-bearing waste-water is processed so that it is in polymer-bearing waste-water, concentration reaches 5mM. Adding H2O2After, the HPAM content in polymer-bearing waste-water decreases, and degradation rate is from fast to slow. In the processing procedure of 10min, HPAM content is reduced to 289.7mg/L by 341.1mg/L. In follow-up processing procedure, HPAM content continuous decrease, to when processing 120min, the content of HPAM is 206.7mg/L, now, is 39.41% such as Fig. 4 to the clearance of HPAM.
Step 3, sodium chloride process
When polymer-bearing waste-water is processed by the NaCl adopting 20g/L so that it is in polymer-bearing waste-water, concentration reaches 500mg/L. After adding NaCl, the decrease in viscosity of polymer-bearing waste-water is very fast. After adding NaCl10min, viscosity is reduced to 1.831mPa S by 2.865mPa S time initial, and in processing procedure, degradation rate progressively slows down. After adding NaCl60min, viscosity is 1.154mPa S, and the degradation rate of viscosity is 59.72%. In follow-up processing procedure, the reduction amplitude of viscosity is less of Fig. 5.
When polymer-bearing waste-water is processed by the NaCl adopting 20g/L so that it is in polymer-bearing waste-water, concentration reaches 500mg/L. After adding NaCl, the HPAM content in polymer-bearing waste-water decreases, and degradation rate is from fast to slow. In the processing procedure of 10min, HPAM content is reduced to 327.1mg/L by 337.6mg/L. In follow-up processing procedure, HPAM content continuous decrease, to when processing 180min, the content of HPAM is 256.3mg/L, and now, the clearance to HPAM is 24.09%. When polymer-bearing waste-water being processed with NaCl, the degraded amplitude of HPAM is less. But, NaCl can realize the quick viscosity reduction such as Fig. 6 to polymer-bearing waste-water.
The present invention also can have other various embodiments; when without departing substantially from present invention spirit and essence thereof; those skilled in the art are when can make various corresponding change and deformation according to the present invention, but these change accordingly and deformation all should belong to the scope of the claims appended by the present invention.
Claims (6)
1. the method that in an efficient polymer-containing sewage in oil field, tri compound expelling water, the fast prompt drop of polymer is glutinous, it is characterised in that a kind of remove what the method that in polymer-containing sewage in oil field, ternary composite flooding water extraction, the fast prompt drop of polymer is glutinous specifically carried out according to following steps:
Step one, utilize ozone-ultraviolet group technology polymer-contained sewage, after polymer-bearing waste-water is passed into, with flow velocity 1��5m/s, the reactor that inside is embedded with ultraviolet lamp tube, pass into the viscosity of polymer-bearing waste-water after ozone 20min��30min that concentration is 33.3mg/L��40mg/L in the reactor, less than 0.2E.Pa.s, to stop operation; Wherein, it is 254nm that the ultraviolet lamp tube of reactor launches wavelength, and power is 40w; Polymer-bearing waste-water is the polymer-containing sewage in oil field containing polymer or the ternary composite flooding water extraction containing polymer; Polymer is the poly-propionic acid amide. of oil field dedicated water soluble macromolecular;
Step 2, hydrogen peroxide process; Adopting concentration is the H of 60%2O2Solution joins in polymer-bearing waste-water after stirring reaction 20��30min, utilizes viscosimeter to measure the viscosity of polymer-bearing waste-water; If the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s; Then stop operation; If the viscosity of polymer-bearing waste-water is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds the H of 60%2O2Solution 0.5��2ml, so that the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s; Wherein, H is added2O2The H in polymer-bearing waste-water after solution2O2The concentration of solution is 1��5ml/L;
Step 3, sodium chloride process; Sodium chloride powder is joined in polymer-bearing waste-water, obtain the polymer-bearing waste-water solution 1 after adding sodium chloride, if polymer-bearing waste-water solution 1 viscosity is less than 0.2E.Pa.s, then stop operation; If polymer-bearing waste-water solution 1 viscosity is be more than or equal to 0.2E.Pa.s, then polymer-bearing waste-water continuously adds sodium chloride powder, obtain the polymer-bearing waste-water solution 2 after adding sodium chloride, so that the viscosity of polymer-bearing waste-water is less than 0.2E.Pa.s;
Wherein, the sodium chloride concentration added in the polymer-bearing waste-water solution 1 after sodium chloride is 5g/L��20g/L;
The sodium chloride concentration adding the polymer-bearing waste-water solution 2 after sodium chloride is 10g/L��30g/L.
2. according to claim 1 a kind of efficient polymer-containing sewage in oil field, the fast prompt drop of polymer is glutinous in tri compound expelling water method, it is characterised in that: in step one, polymer-bearing waste-water is passed into inside with flow velocity 2��4m/s and is embedded with in the reactor of ultraviolet lamp tube.
3. according to claim 2 a kind of efficient polymer-containing sewage in oil field, the fast prompt drop of polymer is glutinous in tri compound expelling water method, it is characterised in that: step one passes into ozone 20min��25min that concentration is 35mg/L��38mg/L.
4. according to claim 3 a kind of efficient polymer-containing sewage in oil field, the fast prompt drop of polymer is glutinous in tri compound expelling water method, it is characterised in that: step 2 adds H2O2The H in polymer-bearing waste-water after solution2O2The concentration of solution is 2��4ml/L.
5. according to claim 4 a kind of efficient polymer-containing sewage in oil field, the fast prompt drop of polymer is glutinous in tri compound expelling water method, it is characterised in that: the sodium chloride concentration added in step 3 in the polymer-bearing waste-water solution 1 after sodium chloride is 5g/L��15g/L.
6. according to claim 5 a kind of efficient polymer-containing sewage in oil field, the fast prompt drop of polymer is glutinous in tri compound expelling water method, it is characterised in that: the sodium chloride concentration adding the polymer-bearing waste-water solution 2 after sodium chloride in step 3 is 10g/L��20g/L.
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