CN106315960A - Treatment method for wastewater of oil and gas field - Google Patents
Treatment method for wastewater of oil and gas field Download PDFInfo
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- CN106315960A CN106315960A CN201610882223.4A CN201610882223A CN106315960A CN 106315960 A CN106315960 A CN 106315960A CN 201610882223 A CN201610882223 A CN 201610882223A CN 106315960 A CN106315960 A CN 106315960A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000011282 treatment Methods 0.000 title claims abstract description 23
- 238000000926 separation method Methods 0.000 claims abstract description 41
- 230000003647 oxidation Effects 0.000 claims abstract description 34
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 238000005189 flocculation Methods 0.000 claims abstract description 19
- 230000016615 flocculation Effects 0.000 claims abstract description 19
- 238000004064 recycling Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000001556 precipitation Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 97
- 230000008569 process Effects 0.000 claims description 57
- 238000005553 drilling Methods 0.000 claims description 41
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 25
- 238000003672 processing method Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000007790 solid phase Substances 0.000 claims description 14
- 238000012986 modification Methods 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 12
- 239000004408 titanium dioxide Substances 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 claims description 2
- 230000005621 ferroelectricity Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 26
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000007885 magnetic separation Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 43
- 239000012530 fluid Substances 0.000 description 30
- 238000002360 preparation method Methods 0.000 description 20
- 230000009514 concussion Effects 0.000 description 10
- 239000013049 sediment Substances 0.000 description 10
- 238000003756 stirring Methods 0.000 description 10
- 239000008346 aqueous phase Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- 239000003292 glue Substances 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 7
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- -1 hydroxyl radical free radical Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
Landscapes
- 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)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a treatment method for wastewater of oil and gas fields. The treatment method comprises the following steps: carrying out electrocatalytic oxidation treatment on wastewater under the pulsed power supply condition, then adding a magnetic flocculant for carrying out flocculation precipitation reaction, and carrying out magnetic separation and solid-liquid separation, so as to obtain treated oil and gas field wastewater. The treatment method disclosed by the invention has good treatment effect on the wastewater of the oil and gas fields, recycling utilization rate of the treated wastewater is high, the technology is simple and automated control can be easily realized.
Description
Technical field
The present invention relates to field of waste water treatment, be specifically related to the processing method of a kind of oil gas field waste water
Background technology
Along with the increasing of oil-gas exploration dynamics, the quantity adopting defeated well is gradually increased, the waste water water yield brought therewith also by
Year be incremented by, oil gas field waste water include causing the harmful components of environmental pollution be oils, salt, antibacterial, some chemical addition agent,
The low-molecular-weight organic compound that heavy metal (such as hydrargyrum, copper, chromium, cadmium, zinc, lead etc.), macromolecular organic compound biodegradation produce
And alkaline matter, cause the main contamination indexs such as colourity, COD, SS, petroleum-type to exceed standard in a large number, metachromia is relatively strong, if the most treated
Directly discharge, to environment heavy damage ecological environment, and will affect oil gas field suitable development and development.
At present the processing method for oil gas field waste water is mainly physical-chemical process, use chemical treatments coagulation, sedimentation,
Oxidation processes is being carried out after solid-liquid separation.This process has a disadvantage in that process chemistry inorganic agent dosage is big, introduces high price gold
Belong to ion, bring secondary pollution and affect recycling；. complex treatment process, the flco amount after process is big, increases solid-liquid and divides
From load；. processing cost is higher；Process is difficult to up to standard；. treatment effect is easily subject to waste water quality impact；Complex process, it is difficult to
Skid, automatic controlling level is low.
Summary of the invention
In view of this, the present invention provides the processing method of a kind of oil gas field waste water, and oil gas field waste water is processed by described method
Effective, the utilization of wastewater resource rate after process is high, and technique is simple, it is easy to Automated condtrol.
A kind of processing method of oil gas field waste water, including: described waste water carries out electrocatalytic oxidation under the conditions of the pulse power
After process, add magnetic flocculant generation flocculation precipitation reaction, the oil gas field waste water after Magneto separate solid-liquid separation is processed.
Preferably, described oil gas field waste water is well-drilling waste water or slippery water returns discharge opeing.
Preferably, described oil gas field waste water is well-drilling waste water.
Preferably, described oil gas field waste water is fracturing wastewater.
Preferably, it is iron electrode, aluminum electrode or titanizing electrode that described electrocatalytic oxidation processes anode electrode, and cathode electrode is
Graphite electrode.
Preferably, described anode electrode is titanizing electrode.
Preferably, the described electrocatalytic oxidation time is 30～240min.
Preferably, the described electrocatalytic oxidation time is 30～120min.
Preferably, described electrocatalytic oxidation processes and uses titanium dioxide to make catalyst.
Preferably, described titanium dioxide usage amount is the 10wt% of described oil gas field waste water.
Preferably, described magnetic flocculant is the permanent magnetism iron powder of surface organic modification.
Preferably, described magnetic flocculant consumption is 3～6g/L oil gas field waste water.
Preferably, described magnetic flocculant consumption is 5～6g/L oil gas field waste water.
Preferably, described method also includes: the oil gas field waste water after described process is carried out recycling.
Preferably, described recycling is preparation drilling fluid.
Preferably, described recycling is preparing fracturing fluid.
Preferably, described oil gas field waste water after Magneto separate solid-liquid separation is processed is specifically, through described Magneto separate
Solid-liquid separation, gained liquid phase is rectifying to obtain the waste water after described process, and gained solid phase reclaims and obtains described magnetic flocculant.
Preferably, described Magneto separate uses disc electromagnetic piece-rate system.
Catalytic oxidation is there is, at anode table in oil gas field waste water power catalytic oxidation treatment process electrode of the present invention in water
Face produces hydroxyl radical free radical OH, O that oxidisability is extremely strong2, produce H at cathode surface2O2、H2, act on while anode cathode
Under create following reaction: the on the one hand strong oxidizing property of the hydroxyl radical free radical (OH) that anode surface produces, strong oxidizing property is to water
In Organic substance carry out Strong oxdiative reaction, and be degraded to CO2And H2O.Meanwhile, a small amount of H that cathode surface produces2O2Also it is
Stronger oxidisability, take part in the Oxidation of Organic substance in water.Finally, it is achieved oil gas field waste water breaks glue.Another reverse side negative electrode
Produce a large amount of H2, because its bubble is minimum and amount big, serve splendid gas drift effect, the float in water body adhered to and emersion
The water surface, makes fine suspension become to be relatively easy to cleaning.Magnetic flocculant is selected to flocculate with float in oil gas field waste water
Effect.Preferable non-expendable electrode makees anode electrode, breaks glue not against consuming electrode generation metal ion, the flco of generation
Less.Use the pulse power to replace direct current or alternating current power supply, reduce the passivation to electrode, fouling corrosion, improve electrocatalytic oxidation
Effect.
Flocculation sediment of the present invention uses and adds magnetic flocculant and the float generation flocculation in oil gas field waste water, has
Effect separating suspension.Oil gas field waste water after flocculation sediment deposits through Magneto separate, solid-liquid separation, solid phase flco, by concussion point
Select the magnetic flocculant in flco, it is achieved the recovery of magnetic flocculant；Liquid phase oil gas field waste water after fine straining is processed.
Compared with prior art, its detailed description is as follows for the present invention:
Use electrocatalytic oxidation to process oil gas field waste water, effectively decompose or modified in oil gas field waste water water so that it is be prone to
Settlement separate.Use the pulse power, improve electrocatalytic oxidation effect, meanwhile, non-expendable electrode can be used, make generation flco
Amount reduces few, and then makes oil gas field good waste water treatment effect；
Well-drilling waste water breaks and is not added with chemical reactivity medicament in glue During Coagulation Process, only adds the flocculation of recuperable magnetic
Agent, reduces secondary pollution, improves flocculation, solid-liquid separation effect, improves the resource utilization rate of processed waste water, can be used for configuring
Drilling fluid；
Use Magneto separate to carry out solid-liquid separation, separating rate is fast, separate thoroughly, separate after solid phase moisture content low, separation sets
Standby little, it is easy to Automated condtrol；
Oil gas field waste water after process carries out recycling, saves the energy, and recycling is effective, recycling
Rate is high；
Technique is simple, strong adaptability, high treating effect, and processing cost is low, can realize skid-mounted type, close-coupled processing.
Detailed description of the invention
The invention discloses the processing method of a kind of oil gas field waste water, those skilled in the art can use for reference present disclosure,
It is suitably modified technological parameter to realize.Special needs to be pointed out is, those skilled in the art are come by all similar replacements and change
Saying and be apparent from, they are considered as being included in the present invention.Preferred embodiment has been passed through in method and the application of the present invention
Be described, related personnel substantially can in without departing from present invention, spirit and scope to method described herein and should
With being modified or suitably changing and combine, realize and apply the technology of the present invention.
In order to realize foregoing invention purpose, the present invention provides techniques below scheme:
A kind of processing method of oil gas field waste water, including: described waste water carries out electrocatalytic oxidation under the conditions of the pulse power
After process, add magnetic flocculant generation flocculation precipitation reaction, the oil gas field waste water after Magneto separate solid-liquid separation is processed.
Oil gas field waste water of the present invention is well-drilling waste water or slippery water returns discharge opeing.Preferably, described oil gas field waste water is
Well-drilling waste water.Preferably, described oil gas field waste water is fracturing wastewater.
It is iron electrode, aluminum electrode or titanizing electrode that electrocatalytic oxidation of the present invention processes anode electrode, and cathode electrode is
Graphite electrode.Preferably, described anode electrode is titanizing electrode.Preferably, the described electrocatalytic oxidation time is 30～240min；
Being more highly preferred to, the described electrocatalytic oxidation time is 30～120min.Described electrocatalytic oxidation processes and uses titanium dioxide to urge
Agent.Preferably, described titanium dioxide usage amount is the 10wt% of described oil gas field waste water.
The permanent magnetism iron powder that magnetic flocculant of the present invention is surface organic modification.Preferably, described magnetic flocculant
Consumption is 3～6g/L oil gas field waste water.It is more highly preferred to, is 5～6g/L oil gas field waste water.
The method of the invention also includes: the oil gas field waste water after described process is carried out recycling.Preferably, institute
State recycling for preparation drilling fluid；Being more highly preferred to, described recycling is preparing fracturing fluid.
Oil gas field waste water after Magneto separate solid-liquid separation is processed of the present invention is specifically, consolidate through described Magneto separate
Liquid separates, and gained liquid phase is rectifying to obtain the waste water after described process, and gained solid phase reclaims and obtains described magnetic flocculant.
Embodiment 1
Electrocatalytic oxidation contrasts with Technology development treatment effect
Matched group experiment condition: take well-drilling waste water 500mL, adds broken glue coagulant PAC (aluminium polychlorid) 6000mg/L,
Stirring coagulation 15min, using sodium hydroxide regulation pH is 9～10, adds PAM (polyacrylamide) 30mg/L, uses pulse electricity
Source is slowly stirred 2～3min, is centrifuged separating, the aqueous phase COD after separation, pH, SS, colourity, oil-containing, flco moisture content, wadding
Body moisture content, dry flco weight.
Experiment condition of the present invention: take well-drilling waste water 500mL, controls electrocatalytic oxidation time 30min, adds that surface is organic to be changed
Property permanent magnetism iron powder make magnetic flocculant, consumption is 6g/L well-drilling waste water, stirs flocculation sediment 10min, uses disk to carry out solid
Liquid separates, and magnetic flocculant, the aqueous phase fine straining after separation, test analysis COD after fine straining are reclaimed in the solid phase concussion after separationcr、pH、
SS, colourity, oil-containing, flco moisture content, dry flco weight, structure is shown in Table 1.
Table 1 uses electrocatalytic oxidation to process well-drilling waste water Contrast on effect with Technology development
Embodiment 2
Battery lead plate comparative study
Take well-drilling waste water 500mL, be respectively adopted aluminum electrode, iron electrode, titanizing electrode as anode, use graphite as the moon
Pole, the employing pulse power, control electrocatalytic oxidation time 30min, catalyst employing powdered titanium dioxide (particle diameter 200 mesh), two
Titanium oxide usage amount is described waste water 10wt%, and the permanent magnetism iron powder adding surface organic modification makees magnetic flocculant, and consumption is 6g/
L well-drilling waste water, stirs flocculation sediment 10min, uses disk to carry out solid-liquid separation, and magnetic flocculation is reclaimed in the solid phase concussion after separation
Agent, the aqueous phase fine straining after separation, test analysis COD after fine strainingcr, pH, SS, colourity, oil-containing, flco moisture content, settling of floccus speed
Degree and filtration speed, the results are shown in Table 2.
Table 2 not plates of similar polarity processes well-drilling waste water effect
Embodiment 3
Treatment effect is affected by power supply type
Using aluminum electrode, titanizing electrode as anode, graphite, as negative electrode, is respectively adopted at DC source, the pulse power
Reason well-drilling waste water, catalyst uses powdered titanium dioxide (particle diameter 200 mesh), and titanium dioxide usage amount is described waste water 10wt%,
Other condition of electro-catalysis keeps consistent, and the permanent magnetism iron powder adding surface organic modification makees magnetic flocculant, and consumption is that 6g/L bores
Well waste water, stirs flocculation sediment 10min, uses disk to carry out solid-liquid separation, and magnetic flocculant is reclaimed in the solid phase concussion after separation,
Aqueous phase fine straining after separation, test analysis COD after fine strainingcr, pH, SS, colourity, oil-containing, the results are shown in Table 3.
Table 3 not plates of similar polarity different electrical power type of process well-drilling waste water effect
Road as shown in Table 3, not plates of similar polarity same power supplies, its treatment effect is different, no matter uses any power supply type to plate
Ti electrode treatment effect is the best.The most identical pole plate processes well-drilling waste water, and pulse power treatment effect is substantially better than unidirectional current
Source treatment effect.
Embodiment 4
Different time consumes Electrode treatment well-drilling waste water effect
Use aluminum electrode as anode, graphite as negative electrode, be respectively adopted DC source, the pulse power process drilling well give up
Water, controls the electrocatalytic oxidation time by table 4, and catalyst uses powdered titanium dioxide (particle diameter 200 mesh), and titanium dioxide usage amount is
Described waste water 10wt%, the permanent magnetism iron powder of surface organic modification makees magnetic flocculant, and consumption is 6g/L well-drilling waste water, stirring flocculation
Precipitation 10min, uses disk to carry out solid-liquid separation, and magnetic flocculant is reclaimed in the solid phase concussion after separation, the aqueous phase essence after separation
Filter, test analysis COD after fine strainingcr, pH, SS, colourity, oil-containing, the results are shown in Table 4.
Table 4 different disposal time pole plate processes well-drilling waste water effect
As shown in Table 4, using metal electrode to process well-drilling waste water, treatment effect impact analysis is found out by different time, with
The increase of the time of process, when using DC source to process waste water, treatment effect improved before this, the most significantly declined, reason
The time that is as increases, and metal electrode consumption increases, and metal electrode treatment effeciency declines.For using the pulse power to process drilling well
Waste water, the increase treatment effeciency of time is substantially constant, illustrates that the pulse power advantageously reduces electrode corrosion and polar board surface knot
Dirt effect.
Embodiment 5:
Utilization of wastewater resource after process is in preparation drilling fluid
Use titanizing electrode as anode, use graphite as negative electrode, take 2000ml and use pulse power process drilling well to give up
Water, controls electrocatalytic oxidation time 40min, and catalyst uses powdered titanium dioxide (particle diameter 200 mesh), and titanium dioxide usage amount is
Described waste water 10wt%, add surface organic modification permanent magnetism iron powder make magnetic flocculant, consumption is 6g/L well-drilling waste water, stirring
Flocculation sediment 10min, uses disk to carry out solid-liquid separation.Magnetic flocculant, the water after separation are reclaimed in solid phase concussion after separation
Phase fine straining, water sample preparation water based polymerization drilling fluid after fine straining, investigate the polymer drilling fluid contrast with clear water preparation.
Take the water sample 400mL of the well-drilling waste water after process, take from water 400mL, be separately added into according to API standard and account for drilling well
The water sample of waste water or the slope soil of tap water 4wt%, the sodium bicarbonate of 0.25wt% is configured to drilling well liquid-based slurry, after one-tenthization 24h, then
The water sample of addition well-drilling waste water or the CMC of tap water 1wt%, the key property index of two kinds of polymer drilling fluids of test analysis,
The results are shown in Table 5.
After table 5 present invention processes, recycling of water resource is used in preparation drilling fluid
As shown in Table 5, using the water prepared polymer drilling fluid again of well-drilling waste water electrocatalytic oxidation post processing, its performance refers to
Mark basically identical with the polymer drilling fluid performance of clear water preparation, illustrate to use electrocatalytic oxidation to process well-drilling waste water, after process
Water sample can with resource recycle prepared polymer drilling fluid, not only achieve the purpose turned waste into wealth, and decrease ring
Environment pollution, reduces integrated treatment cost.
Embodiment 6
Different water sample preparation slippery water fracturing fluid base fluid rheological characteristics and temperature resistance Contrast on effect
Take slippery water and return discharge opeing 2000mL, use titanizing electrode as anode, use graphite as negative electrode, take 2000ml and adopt
Take slippery water with pulse power process and return discharge opeing, control electrocatalytic oxidation time 20min, add the permanent magnet of surface organic modification
Powder makees magnetic flocculant, and consumption is that 3g/L slippery water returns discharge opeing, stirs flocculation sediment 5min, uses disk to carry out solid-liquid separation,
Magnetic flocculant is reclaimed in solid phase concussion after separation, and the aqueous phase fine straining after separation, the water that slips after being processed returns discharge opeing water sample.
Take slippery water respectively to return the water that slips after discharge opeing directly settles water sample, the present invention processes and return discharge opeing water sample and tap water is each
400mL, is separately added into 0.03% polymeric friction reducer, uses six speed rotating cylinder viscometer (170s after dissolving-1) in different temperatures
Under the conditions of the preparation slippery water of preparation, and test slippery water fracturing fluid index, the results are shown in Table 6.
Table 6
As shown in Table 6, slippery water returns the water sample taking upper strata after discharge opeing directly settles, and ss suspended solid content is higher, and water colour is
Light yellow, colourity is high, and friction reducer dissolution time is longer, and during the slippery water fracturing fluid of configuration 25 DEG C, solution viscosity effect is preferable, but
Increasing solution viscosity with temperature and decline fast, the slippery water fracturing fluid temperature resistance of preparation is poor.Slippery water after the present invention processes returns row
Liquid, ss suspended solid content is relatively low, and water colour is limpid, and colourity is low, and friction reducer dissolves soon in water, prepares slippery water fracturing fluid, and it is each
Item performance indications change little at different temperatures, illustrate that the slippery water after using the present invention to process returns the smooth hydraulic pressure of discharge opeing preparation
Split liquid and there is preferable stability and temperature resistance.
Embodiment 7
Different water sample preparation slippery water fracturing liquid rubber-breakings and residue contrast
Take slippery water and return discharge opeing 2000mL, use titanizing electrode as anode, use graphite as negative electrode, take 2000ml and adopt
Take slippery water with pulse power process and return discharge opeing, control electrocatalytic oxidation time 20min, add the permanent magnet of surface organic modification
Powder makees magnetic flocculant, and consumption is that 3g/L slippery water returns discharge opeing, stirs flocculation sediment 5min, uses disk to carry out solid-liquid separation,
Magnetic flocculant is reclaimed in solid phase concussion after separation, and the aqueous phase fine straining after separation, the water that slips after being processed returns discharge opeing water sample.
Take slippery water respectively to return the water that slips after discharge opeing directly settles water sample, the present invention processes and return discharge opeing water sample and tap water is each
400mL, is separately added into 0.03% polymeric friction reducer, 0.01% gel breaker, prepares slippery water fracturing fluid base fluid, tests at 90 DEG C
Analyze broken glue time, after breaking gel viscosity and level of residue, the results are shown in Table 7.
Table 7 different water sample preparation slippery water fracturing liquid rubber-breaking and residue contrast
| Broken glue time/min | Viscosity mPa.s after breaking gel | Level of residue/mg/L | |
| Discharge opeing preparation slippery water is returned in sedimentation | 30 | 1.5 | 325.5 |
| Clear water preparation slippery water | 30 | 1.1 | — |
| The present invention processes post processing water sample preparation slippery water | 30 | 1.2 | 13.2 |
As shown in Table 7, in the case of the identical broken glue time, the waste water after the present invention processes is reconfigured at slippery water, its broken glue
Rear residual night, viscosity was relatively low, and level of residue is little, is conducive to the row of returning, and reservoir damage is little.
Embodiment 8
Different water sample preparation slippery water fracturing fluids help the contrast of row's property
Take slippery water and return discharge opeing 2000mL, use titanizing electrode as anode, use graphite as negative electrode, take 2000ml and adopt
Take slippery water with pulse power process and return discharge opeing, control electrocatalytic oxidation time 20min, add the permanent magnet of surface organic modification
Powder makees magnetic flocculant, and consumption is that 3g/L slippery water returns discharge opeing, stirs flocculation sediment 5min, uses disk to carry out solid-liquid separation,
Magnetic flocculant is reclaimed in solid phase concussion after separation, and the aqueous phase fine straining after separation, the water that slips after being processed returns discharge opeing water sample.
Take slippery water respectively to return the water that slips after discharge opeing directly settles water sample, the present invention processes and return discharge opeing water sample and tap water is each
400mL, is separately added into 0.03% polymeric friction reducer, 0.01% gel breaker, prepares slippery water fracturing fluid base fluid, repeatedly test point
Analyse the surface tension of solution after breaking gel, the results are shown in Table 8.
Table 8 different water sample preparation slippery water fracturing fluid base fluid helps the contrast of row's property
Analyzing from table 8 and find out, the present invention processes post processing water sample and is configuring slippery water, and its surface tension after breaking gel is less than
Return after discharge opeing directly settles at configuration slippery water, illustrate that the present invention processes post processing water sample and is reconfigured at slippery water and is conducive to the row of returning,
The row of returning is the least to formation damage.
Embodiment 9:
Waste water utilization rate contrasts
Take slippery water and return discharge opeing 2000mL, use titanizing electrode as anode, use graphite as negative electrode, take 2000ml and adopt
Take slippery water with pulse power process and return discharge opeing, control electrocatalytic oxidation time 20min, add the permanent magnet of surface organic modification
Powder makees magnetic flocculant, and consumption is that 3g/L slippery water returns discharge opeing, stirs flocculation sediment 5min, uses disk to carry out solid-liquid separation,
Magnetic flocculant is reclaimed in solid phase concussion after separation, and the aqueous phase fine straining after separation, the water that slips after being processed returns discharge opeing water sample.
Take slippery water respectively to return the water that slips after discharge opeing directly settles water sample, the present invention processes and return discharge opeing water sample and tap water is each
400mL, is separately added into 0.03% polymeric friction reducer, 0.01% gel breaker, prepares slippery water fracturing fluid base fluid, repeatedly test point
The slippery water fracturing fluid base fluid performance requirement of analysis preparation reaches viscosity at 90 DEG C and reaches thin stillage recycling rate during 5mPa s, and result is shown in
Table 9.
Table 9 waste water utilization rate contrasts
As shown in Table 9, using present invention process to carry out after returning discharge opeing configuring slippery water, water reuse rate is far above the row of returning again
Liquid directly carries out the technique settled, and utilization of wastewater resource rate is up to 83.8%.Maximum resourceization is conducive to utilize, it is achieved joint
The purpose that can reduce discharging.
Below it is only the preferred embodiment of the present invention, it is noted that it is right that above-mentioned preferred implementation is not construed as
The restriction of the present invention, protection scope of the present invention should be as the criterion with claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, it is also possible to make some improvements and modifications, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (10)
1. the processing method of an oil gas field waste water, it is characterised in that including: described waste water carries out electricity under the conditions of the pulse power
After catalytic oxidation treatment, add magnetic flocculant generation flocculation precipitation reaction, the oil after Magneto separate solid-liquid separation is processed
Gas field wastewater.
Processing method the most according to claim 1, it is characterised in that described oil gas field waste water is well-drilling waste water or slippery water
Return discharge opeing.
Processing method the most according to claim 1, it is characterised in that it is ferroelectricity that described electrocatalytic oxidation processes anode electrode
Pole, aluminum electrode or titanizing electrode, cathode electrode is graphite electrode.
Processing method the most according to claim 3, it is characterised in that described anode electrode is titanizing electrode.
Processing method the most according to claim 1, it is characterised in that described electrocatalytic oxidation process the time be 30～
240min。
Processing method the most according to claim 1, it is characterised in that described electrocatalytic oxidation processes and uses titanium dioxide to make
Catalyst.
Processing method the most according to claim 1, it is characterised in that described magnetic flocculant be surface organic modification forever
Magnetic iron powder.
Processing method the most according to claim 1, it is characterised in that described magnetic flocculant consumption is 3～6g/L oil gas
Field waste water.
Processing method the most according to claim 1, it is characterised in that described method also includes: by the oil after described process
Gas field wastewater carries out recycling.
Processing method the most according to claim 1, it is characterised in that described after Magneto separate solid-liquid separation is processed
Oil gas field waste water specifically, through described Magneto separate solid-liquid separation, gained liquid phase is rectifying to obtain the waste water after described process, institute
Obtain solid phase recovery and obtain described magnetic flocculant.
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| CN109209268A (en) * | 2018-10-19 | 2019-01-15 | 中国石油集团渤海钻探工程有限公司 | The method that drain is returned in acidification is handled using reproducibility iron powder |
| CN112047539A (en) * | 2020-09-07 | 2020-12-08 | 昆山美淼环保科技有限公司 | Sewage treatment method |
| CN113480058A (en) * | 2021-08-13 | 2021-10-08 | 苏州融和福天宝环保科技有限责任公司 | Treatment method of electroplating degreasing wastewater |
| CN113582411A (en) * | 2021-08-13 | 2021-11-02 | 苏州融和福天宝环保科技有限责任公司 | Pretreatment method of electroplating wastewater |
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