CN108975638A - A kind of method of the processing of oilfield drilling waste liquid - Google Patents
A kind of method of the processing of oilfield drilling waste liquid Download PDFInfo
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- CN108975638A CN108975638A CN201811113282.0A CN201811113282A CN108975638A CN 108975638 A CN108975638 A CN 108975638A CN 201811113282 A CN201811113282 A CN 201811113282A CN 108975638 A CN108975638 A CN 108975638A
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- 238000005553 drilling Methods 0.000 title claims abstract description 25
- 239000002699 waste material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000002351 wastewater Substances 0.000 claims abstract description 28
- 238000003672 processing method Methods 0.000 claims abstract description 17
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 17
- 239000003292 glue Substances 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 239000004411 aluminium Substances 0.000 claims abstract 2
- 230000003851 biochemical process Effects 0.000 claims abstract 2
- 239000001110 calcium chloride Substances 0.000 claims abstract 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract 2
- 229910052799 carbon Inorganic materials 0.000 claims abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 22
- 230000035484 reaction time Effects 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 20
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000011790 ferrous sulphate Substances 0.000 claims description 12
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 12
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 12
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 8
- 239000010865 sewage Substances 0.000 claims description 8
- 230000001112 coagulating effect Effects 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 5
- 229910001882 dioxygen Inorganic materials 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000005842 biochemical reaction Methods 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 238000010612 desalination reaction Methods 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 238000000108 ultra-filtration Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 230000009189 diving Effects 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 3
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 2
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims 1
- 230000015271 coagulation Effects 0.000 claims 1
- 238000010992 reflux Methods 0.000 claims 1
- 238000005096 rolling process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 8
- 229910001425 magnesium ion Inorganic materials 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000013327 media filtration Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/46176—Galvanic cells
-
- 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
- C02F1/5281—Installations for water purification using chemical 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- 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
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- 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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a kind of processing methods of oilfield drilling waste liquid, it is optimized including the treatment process to waste liquid of drilling (drillng operation waste water and fracturing outlet liquid) and changes advanced treating, its technical effect includes the following contents: 1, gel breaker being changed to white aluminium polychloride by conventional calcium chloride, while improving broken glue effect, reduce added amount of chemical；2, increase biochemical system between two-stage Fenton unit, the large amount of organic after can effectively removing level-one Fenton chain rupture open loop reduces the dosage of second level Fenton, while increasing whole removal rate；3, conventional activated carbon adsorption is changed in conjunction with biochemical process biological mixed bed, substantially increases the impact resistance of biochemical system and the utilization rate of active carbon；4, it after optimizing pretreating process, obtains more preferably into film water matter, disc tube reverse osmosis (dt-ro) film is replaced using multistage coiled reverse osmosis membrane, cost of investment is greatly saved.This method is also suitable for individually processing drillng operation waste water or fracturing outlet liquid simultaneously.
Description
Technical field
The present invention relates to a kind of process field of sewage produced during exploitation of oil-gas field, in particular to a kind of oil gas fields
The processing method of waste liquid of drilling.
Background technique
Waste liquid of drilling is mainly drillng operation waste water and fracturing outlet liquid, and wherein drillng operation waste water is mainly that well-flushing is useless
Water, well site flushing waste water and equipment cleaning waste water etc., the various additives in major pollutants SS, petroleum-type and drilling fluid；
Fracturing work after complete well can generate the fracturing outlet liquid containing a large amount of guanidine glue, petroleum-type and other various additives, and carry
There are the landwaste to fall off on a small quantity from stratum and loose proppant, with complicated component, pollutant kind is more, content is high, glutinous
The feature that degree is big, emulsification degree is high.Its pollutant is mainly organic matter, SS, petroleum-type, calcium ions and magnesium ions, salt content height.Wherein
SS, petroleum-type, calcium ions and magnesium ions can preferably be removed by conventional materializing strategy technique, but the removal effect of organic matter is then
At the difficult point of such sewage treatment, salt content can be removed by the film of back segment, and the stable operation of membranous system is also largely
Ground is by the content for pre-processing laggard film organic matter of sewage.
There are following two disadvantages for traditional waste liquid of drilling processing method:
1, COD removal ability is weaker, pretreated still higher into film COD of sewage content, and back segment reverse osmosis membrane is caused to be easy
Dirt is stifled, and operation stability is poor；
2, laggard film water quality inferiority is pre-processed, conventional coiled reverse osmosis membrane is unable to operate stably, exists with disc tube reverse osmosis (dt-ro) film
Desalination is carried out in the processing of waste liquid of drilling back segment, cost of investment is high, and operation stability is general.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of processing method of oilfield drilling waste liquid, integrated treatment
Waste liquid of drilling can also individually handle drillng operation waste water or fracturing outlet liquid therein, can play preferable treatment effect.
The present invention is achieved by the following technical solutions:
A kind of processing method of oilfield drilling waste liquid, main includes anti-by optimization leading portion materialized pretreatment technique and back segment
Permeable membrane substitutes the utilization of disc tube reverse osmosis (dt-ro) film using multistage coiled reverse osmosis membrane, it is characterised in that is realized by following steps
:
1, drillng operation waste water is pumped into brokenly in glue tank from collecting pit, and gel breaker white PAC is added into broken glue tank, and dosage is
6 ‰ stirring 30min, in waste water pump to dehydration device after breaking gel, by after breaking gel sludge and waste water good separation.Waste water enters
In conditioning tank, sludge storage is to be processed；
2, the drillng operation waste water after separating fracturing outlet liquid with broken glue is uniformly mixed in conciliation pond by diving mixer,
Mixed sewage adds sulfuric acid tune pH value to 3-4, and Fenton's reaction pond is entered after pre-processing by iron-carbon micro-electrolysis, anti-to Fenton
Add ferrous sulfate and hydrogen peroxide in Ying Chi, hydrogen peroxide dosage with it is expected that degradation COD mass ratio is 1:1, the matter of ferrous sulfate
Amount is 1.75:1 than dioxygen water quality, and the reaction time is 2.5 hours；
3, the water outlet after Fenton, which enters, removes hard coagulating sedimentation section, is sodium hydroxide and sodium carbonate except medicament is added firmly, adds hydrogen
PH control is in 8.4, reaction time 30min when sodium oxide molybdena, and PH is controlled in 9.4, reaction time 30min when adding sodium carbonate,
Flocculant PAC is added after reaction, and dosage is 0.5 ‰, reaction time 15min, then adds PAM, dosage is
10ppm, reaction time 10min enter sedimentation tank mud water and separate after flocculation；
4, the supernatant after separating enters biological mixed bed reaction zone, and the control biochemistry pond O end dissolved oxygen is greater than in biological mixed bed
5mg/l, after biochemical reaction, mud mixture is separated in secondary settling tank, it is biochemical after water outlet enter two fractions reaction tank, Xiang Fen
Add ferrous sulfate in reaction tank and sulfuric acid reconcile PH to 3 or so, then add hydrogen peroxide, hydrogen peroxide dosage with it is expected that drop
Solution COD mass ratio is 0.8:1, and the quality of ferrous sulfate is 1.5:1 than dioxygen water quality, and the reaction time is 1 hour, and reaction terminates
It is separated afterwards in back segment coagulating sedimentation, the dosage that PAC dosage is 0.3 ‰, PAM is 5ppm, and the reaction time is 10min, wadding
Enter sedimentation tank mud water after solidifying to separate；
5, the supernatant after precipitation and separation enters back segment multi-medium filtering system, removes oil removal；Water outlet enters ultrafiltration system, into
One step removes oil removal, and water outlet enters the system desalination of back segment coiled reverse osmosis membrane, produces water and is discharged into production water collecting pit, concentrated water is then discharged into
Concentrated water collecting pit.
A kind of processing method for oilfield drilling waste liquid that the present invention obtains, technical effect have following three points:
1, it has changed gel breaker, promotes the less increase of sewage TDS content while broken glue effect；
2, second level Fenton operation medicament largely reduces after increasing biochemical mixing bed process, adaptability of the biochemical system to well-drilling waste water
Stronger, whole COD removal rate increases, the using effect enhancing of activated carbon adsorptive capacity；
3, after optimizing pretreating process, disc tube reverse osmosis (dt-ro) film is replaced with multistage coiled reverse osmosis membrane, investment substantially reduces, and film
System run all right.
Detailed description of the invention
Fig. 1 is the schematic diagram of the processing method of oilfield drilling waste liquid under original technology
Fig. 2 is the schematic diagram of the processing method of the oilfield drilling waste liquid of embodiment 1
Specific embodiment:
Below with reference to embodiment, the present invention is further described.
Embodiment 1:
As shown in Fig. 2, a kind of processing method of oilfield drilling waste liquid provided by the invention
A kind of processing method of oilfield drilling waste liquid, it is main including optimization leading portion materialized pretreatment technique and reverse osmosis in back segment
System substitutes the utilization of disc tube reverse osmosis (dt-ro) film using multistage coiled reverse osmosis membrane；
Drillng operation waste water, COD:1000mg/l, SS:2400mg/l, petroleum-type: 30mg/l, TDS:9000-11000mg/l,
Ga2+: 1200mg/l, Mg2+: 500mg/l, PH:6-8；
Fracturing outlet liquid, COD:3000mg/l or so, SS:1400mg/l, petroleum-type: 50mg/l, TDS:22000-25000mg/
L, Ga2+: 1400mg/l, Mg2+: 650mg/l, PH:6-8；
Handling water is respectively 10m3/ h, it is 20m that conditioning tank, which mixes laggard system water,3/h
1, drillng operation waste water is pumped into brokenly in glue tank from collecting pit, and gel breaker white PAC is added into broken glue tank, and dosage is
600L/h(concentration is 10%) to stir 30min, in waste water pump to dehydration device after breaking gel, by after breaking gel sludge and waste water it is good
Good separation, waste water enter in conditioning tank, and SS is about 200mg/l, and sludge storage is to be processed；
2, the drillng operation waste water after separating fracturing outlet liquid with broken glue is uniformly mixed in conciliation pond by diving mixer,
COD is about 2000mg/l after mixing, and SS is about 800mg/l, and petroleum-type is about 40mg/l, TDS 15500-18000mg/l, Ga2+
About 1300mg/l, Mg2+About 570mg/l；Mixed sewage adds sulfuric acid tune pH value to 3-4, pre- by iron-carbon micro-electrolysis
Enter Fenton's reaction pond after processing, adds ferrous sulfate and hydrogen peroxide into Fenton's reaction pond, this section of COD degradation rate is expected to be
60%, hydrogen peroxide dosage be 80L/h(30% concentration), ferrous sulfate dosage be 420L/h(configure 10% concentration), sulfuric acid according to
PH value adds in right amount, and the reaction time is 2.5 hours；
3, the water outlet after Fenton, which enters, removes hard coagulating sedimentation section, is sodium hydroxide (30% content) and carbonic acid except medicament is added firmly
Sodium (10% concentration of configuration), PH control is in 8.4, reaction time 30min when adding sodium hydroxide, and PH is controlled when adding sodium carbonate
9.4, reaction time 30min；Add flocculant PAC after reaction, dosage be 100L/h(configuration concentration be 10%),
Reaction time is 15min, then adds PAM, and dosage is that 20L/h(configures 1 ‰ concentration), reaction time 10min, after flocculation
Into sedimentation basin mud-water separation, being discharged COD is about 800mg/l or so, and petroleum-type is less than 5mg/l, Ga2+、Mg2+Respectively less than
150mg/l；
4, the supernatant after separating enters biological mixed bed reaction zone, adjusts air quantity in biological mixed bed, controls the biochemistry pond O end
Dissolved oxygen is greater than 5mg/l, and after biochemical reaction, muddy water mixed solution is separated in secondary settling tank；Being discharged COD is about 250mg/l or so, into
Enter two fractions reaction tank, ferrous sulfate is added into Fenton's reaction pond and sulfuric acid reconciles PH to 3 or so, then adds dioxygen
Water, the estimated removal rate of the section is 40%, and hydrogen peroxide dosage is 5.3L/h(30% concentration), the dosage of ferrous sulfate is 24L/h
(10% concentration of configuration), the reaction time is 1 hour；It is separated after reaction in back segment coagulating sedimentation, PAC dosage is 60L/h
(10% concentration of configuration), the dosage of PAM are that 10L/h(configures 1 ‰ concentration), the reaction time is 10min, and it is heavy to enter after flocculation
Shallow lake pond mud-water separation, water outlet COD are about 150mg/l, and petroleum-type is less than 0.5mg/l, Ga2+、Mg2+Respectively less than 50mg/l；
5, the supernatant after precipitation and separation enters back segment media filtration system and removes oil removal, and water outlet SS is less than 5mg/l, be discharged into
Enter ultrafiltration system, further remove oil removal, water outlet SS is less than 1mg/l, and ultra-filtration water enters back segment coiled reverse osmosis membrane system
Desalination, the final water COD that produces are less than 50mg/l, TDS 465-540mg/l, SS, petroleum-type, Ga2+、Mg2+Almost 0, produce water row
Enter to produce water collecting pit, concentrated water is then discharged into concentrated water collecting pit.
Embodiment 2:
A kind of processing method of oilfield drilling waste liquid provided by the invention, substantially application method and embodiment 1 are consistent, different
Be in the present embodiment, can by its with to drillng operation waste water independent processing, handle drillng operation waste water when, Fenton is anti-
Answer section removal rate constant, but added amount of chemical need to be according to the content of organics appropriate adjustment of drillng operation waste water, biochemical system is living
Property charcoal add ratio and be changed to 2.5%, biochemical pool capacity suitably reduces according to organic volumetric loading, it is ensured that organic volumetric loading control exists
1.0kg/m3.d within.
Claims (6)
1. a kind of processing method of oilfield drilling waste liquid, it is characterised in that realized by following steps:
(1) drillng operation waste water is pumped into brokenly in glue tank from collecting pit, and gel breaker white PAC is added into broken glue tank, and dosage is
6 ‰ stirring 30min, in waste water pump to dehydration device after breaking gel, by after breaking gel sludge and waste water good separation, waste water enter
In conditioning tank, sludge storage is to be processed；
(2) the drillng operation waste water after separating fracturing outlet liquid with broken glue is uniformly mixed in conciliation pond by diving mixer
It closes, mixed sewage adds sulfuric acid tune pH value to 3-4, and Fenton's reaction pond, Xiang Fen are entered after pre-processing by iron-carbon micro-electrolysis
Add ferrous sulfate and hydrogen peroxide in reaction tank, hydrogen peroxide dosage with it is expected that degradation COD mass ratio is 1:1, ferrous sulfate
Quality than dioxygen water quality be 1.75:1, the reaction time be 2.5 hours；
(3) water outlet after Fenton, which enters, removes hard coagulating sedimentation section, is sodium hydroxide and sodium carbonate except medicament is added firmly, adds hydrogen
PH control is in 8.4, reaction time 30min when sodium oxide molybdena, and PH is controlled in 9.4, reaction time 30min when adding sodium carbonate,
Flocculant PAC is added after reaction, and dosage is 0.5 ‰, reaction time 15min, then adds PAM, dosage is
10ppm, reaction time 10min enter sedimentation tank mud water and separate after flocculation；
(4) supernatant after separating enters biological mixed bed reaction zone, and the control biochemistry pond O end dissolved oxygen is greater than in biological mixed bed
5mg/l, after biochemical reaction, mud mixture is separated in secondary settling tank, it is biochemical after water outlet enter two fractions reaction tank, Xiang Fen
Add ferrous sulfate in reaction tank and sulfuric acid reconcile PH to 3 or so, then add hydrogen peroxide, hydrogen peroxide dosage with it is expected that drop
Solution COD mass ratio is 0.8:1, and the quality of ferrous sulfate is 1.5:1 than dioxygen water quality, and the reaction time is 1 hour, and reaction terminates
It is separated afterwards in back segment coagulating sedimentation, the dosage that PAC dosage is 0.3 ‰, PAM is 5ppm, and the reaction time is 10min, wadding
Enter sedimentation tank mud water after solidifying to separate；
(5) supernatant after precipitation and separation enters back segment multi-medium filtering system, removes oil removal, and water outlet enters ultrafiltration system,
Oil removal is further removed, water outlet enters the system desalination of back segment coiled reverse osmosis membrane, produces water and is discharged into production water collecting pit, concentrated water is then arranged
Enter concentrated water collecting pit.
2. the processing method of oilfield drilling waste liquid according to claim 1, it is characterised in that with white aluminium polychloride
Gel breaker instead of calcium chloride as drillng operation waste water.
3. the processing method of oilfield drilling waste liquid according to claim 1, it is characterised in that between two-stage Fenton unit
Increase biochemical system.
4. the processing method of oilfield drilling waste liquid according to claim 1, it is characterised in that adsorb conventional activated carbon
Coagulation is changed to biological mixed bed system in conjunction with biochemical process.
5. the processing method of oilfield drilling waste liquid according to claim 1, it is characterised in that in biological mixed bed system
Active carbon adds 5% that ratio is the total pool capacity of biochemical reaction tank, has additional interior reflux pump in the biochemical pond O.
6. the processing method of oilfield drilling waste liquid according to claim 1, it is characterised in that use multistage rolling reverse osmosis
Permeable membrane replaces disc tube reverse osmosis (dt-ro) film.
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| CN112340878A (en) * | 2020-10-23 | 2021-02-09 | 西南石油大学 | Treatment method for standard-reaching discharge of shale gas fracturing flowback fluid |
| CN112679020A (en) * | 2020-12-25 | 2021-04-20 | 成都硕特环保科技有限公司 | Low-cost shale gas fracturing flowback fluid treatment system and treatment method |
| CN115010320A (en) * | 2022-07-29 | 2022-09-06 | 重庆满翼环保科技有限公司 | high-COD wastewater treatment method and treatment device |
| CN115321744A (en) * | 2022-06-18 | 2022-11-11 | 重庆满翼环保科技有限公司 | Gas field wastewater treatment method |
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