CN107235580A - Oilfield drilling fracturing outlet liquid processing method and equipment - Google Patents
Oilfield drilling fracturing outlet liquid processing method and equipment Download PDFInfo
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- CN107235580A CN107235580A CN201710342391.9A CN201710342391A CN107235580A CN 107235580 A CN107235580 A CN 107235580A CN 201710342391 A CN201710342391 A CN 201710342391A CN 107235580 A CN107235580 A CN 107235580A
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- 239000007788 liquid Substances 0.000 title claims abstract description 119
- 238000005553 drilling Methods 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 48
- 238000009388 chemical precipitation Methods 0.000 claims abstract description 37
- 230000003647 oxidation Effects 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims description 58
- 238000005189 flocculation Methods 0.000 claims description 53
- 230000016615 flocculation Effects 0.000 claims description 53
- 150000002500 ions Chemical class 0.000 claims description 36
- 239000000126 substance Substances 0.000 claims description 35
- 238000005352 clarification Methods 0.000 claims description 25
- 239000010802 sludge Substances 0.000 claims description 24
- 238000007667 floating Methods 0.000 claims description 15
- 150000003384 small molecules Chemical class 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 13
- 239000000701 coagulant Substances 0.000 claims description 10
- 238000005868 electrolysis reaction Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000009296 electrodeionization Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005345 coagulation Methods 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000007711 solidification Methods 0.000 abstract description 2
- 230000008023 solidification Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 15
- 238000001556 precipitation Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000014413 iron hydroxide Nutrition 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 230000029219 regulation of pH Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011435 rock 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/005—Waste disposal systems
- E21B41/0057—Disposal of a fluid by injection into a subterranean formation
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
- C02F1/52—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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Hydrology & Water Resources (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)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of oilfield drilling fracturing outlet liquid processing method and equipment.Fracturing outlet liquid-Oil-gas Separation-tune pH value-electric flocculation-one-level physico-chemical precipitation clarification-Electro-catalytic Oxidation Process-bis- grade physico-chemical precipitation clarification-device for separating mud and water-discharge or recycling, it can realize and the fracturing outlet liquid is disposably subjected to oily recovery, water process, three functions of mud solidification, realize qualified discharge or the re-injection application of fracturing outlet liquid, realize the purpose of recycling, there is great social and economic significance to the pollutant of oil drilling, both the transport of the fracturing fluid can be reduced, storage, processing cost, resourcebility is recycled again, it regard the water as other purposes on well.
Description
Technical field
Handled the present invention relates to a kind of equipment applied in oil gas field, more particularly to a kind of oilfield drilling fracturing outlet liquid
Method and apparatus.
Background technology
Petroleum-gas fiedl (calling oil gas field in the following text) is after the completion of drilling well, it is necessary to carry out fracturing work.The purpose of fracturing work is to utilize
The oil-containing gassiness gap of rock stratum under the effect of the pressure, is carried out pressure break dredging, enables oil gas by the chemical attack composition of fracturing fluid
Swimmingly focus in well and produced by lifting oil pumping mechanism of qi outside well along or through the gap.The fracturing fluid system human configuration,
Containing a variety of (about kind more than 20) chemical substances and a variety of pressure break functional materials, with chemical corrosivity, it is impossible to residual to rest on
In stratum, returned through oil well after row draws back ground, need to handle to the standard for meeting environmental requirement, be discharged or recycling.
Because the fracturing outlet liquid contains oil, mineralized water, chemical substance and pressure break feature thing, corrosivity is strong, acid strong,
It is difficult to handle so using conventional methods.It is reported that using a variety of methods such as biology, materialization, membrane filtrations all because its composition is special
And cannot effectively degrade, therefore existing fracturing outlet liquid is discarded in the storage pond in desert steppe gobi by substantial amounts of, constitutes ring
The severe contamination hidden danger in border.
The content of the invention
The invention provides oilfield drilling fracturing outlet liquid processing method and equipment, pressure break in background technology is which overcomed
Return the existing deficiency of discharge opeing processing.
The present invention solves one of technical scheme used of its technical problem：
Oilfield drilling fracturing outlet liquid processing method, comprising：
Step (1), Oil-gas Separation step separates the profit of fracturing outlet liquid, reclaims the oil isolated；
Step (2), adjusts pH value step, the pH value of the fuel-displaced fracturing outlet liquid of regulation separation；
Step (3), electric flocculation step is adjusted in the fracturing outlet liquid feeding electric flocculation container after pH value, the electric flocculation container
Provided with first electrode group, first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, both makes pressure break
Return discharge opeing and produce degraded oxidation reaction .OH ions and electrode ionization synthetic flocculant are made again, flocculant is sent out with fracturing outlet liquid
Give birth to flocculation reaction and harmful substance in fracturing outlet liquid is flocculated into wadding, and then precipitate in case processing；
Step (4), one-level physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electric flocculation step in add flocculant and
At least one of coagulant, makes fracturing outlet liquid physico-chemical precipitation realize clarification；
Step (5), electrocatalytic oxidation step produces electrocatalysis oxidation reaction, to produce .OH ions .OH ion damageds and
Interrupt the macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, the degraded of small molecule nuisance is in oxide
And realize innoxious；
Step (6), two grades of physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electrocatalytic oxidation sewage step in add
At least one of flocculant and coagulant, make fracturing outlet liquid physico-chemical precipitation realize further clarification；
Step (7), mud-water separation step isolates the sludge precipitated, and press filtration processing sludge.
Among one embodiment：In the Oil-gas Separation step, fracturing outlet liquid flows into electric in separation container, separation container
The microbubble that floating device is produced rises with the fine oily strain being blended in liquid floats to liquid level, and the oil of liquid level is skimmed into setting by microbubble
To handle recovery in the oil guide groove around separation container upper shed, separate fuel-displaced fracturing outlet liquid and be pumped at next step
Reason.
What the present invention solved the technical scheme used of its technical problem two is：
Oilfield drilling fracturing outlet liquid processing equipment, comprising：
Gas and oil separating plant, separates the profit of fracturing outlet liquid, reclaims the oil isolated；
Electric flocculation device, including electric flocculation container and the first electrode group being located in electric flocculation container, electric flocculation container connect
Logical gas and oil separating plant, first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, both makes pressure break
Return discharge opeing and produce degraded oxidation reaction .OH ions and electrode ionization synthetic flocculant are made again, flocculant is sent out with fracturing outlet liquid
Give birth to flocculation reaction and harmful substance in fracturing outlet liquid is flocculated into wadding, and then precipitate in case processing；
First physico-chemical precipitation clarifier, including the first Fining vessel and the first chemicals dosing plant, first Fining vessel connect
Be powered the container that flocculates, and first chemicals dosing plant the first Fining vessel of connection is so that energy is toward addition flocculant in the first Fining vessel and mixes
At least one of solidifying agent, so that fracturing outlet liquid physico-chemical precipitation realizes clarification；
Electrocatalysis oxidation apparatus, including process container and the electrocatalysis oxidation apparatus being located in process container, the processing are held
Device connects the first Fining vessel, and the electrocatalysis oxidation apparatus produces electrocatalysis oxidation reaction, and to produce .OH ions .OH ions are broken
Go bad and interrupt the macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, the degraded of small molecule nuisance is in oxygen
Compound and realize innoxious；
Second physico-chemical precipitation clarifier, including the second Fining vessel and the second chemicals dosing plant, second Fining vessel connect
Logical process container, second chemicals dosing plant connects the second Fining vessel with can be toward addition flocculant and coagulation in the second Fining vessel
At least one of agent, so that fracturing outlet liquid physico-chemical precipitation realizes further clarification；And
Sludge press filtration device, including filter press, the sludge that press filtration processing clarification precipitates.
Among one embodiment：The Oil Water Sludge Separation device, including separation container, oil guide groove and electric air floating device, the Oil Guide
Groove is installed in around separation container upper shed, and the separation container is provided with separation water inlet and separation delivery port, the electric air floating device
It is located in separation container so that microbubble can be produced, the fracturing outlet liquid flows into separation container, the electric floating by separating water inlet
The microbubble that device is produced rises with the fine oily strain being blended in liquid floats to liquid level, and the oil of liquid level is skimmed into Oil Guide by microbubble
To handle recovery in groove, the separation delivery port connects electric flocculation container.
Among one embodiment：First electrode group in the electric flocculation device includes two and uses what insoluble petal material was made
Electrode basket, the electrode basket offers mesh, and the two electrodes basket can be conductively connected power positive cathode respectively, and the electrode basket is used to place
The electrode particle for electrode ion can be electrolysed；Wherein：The electrode basket obtains electric energy, and electrode particle electrolysis is electrode ion.
Among one embodiment：The electric flocculation device also includes one the 3rd chemicals dosing plant, the 3rd chemicals dosing plant connection electricity wadding
Solidifying container adjusts the pH value of fracturing outlet liquid with energy toward addition chemical material in electric flocculation container.
The technical program is compared with background technology, and it has the following advantages that：
Fracturing outlet liquid-Oil-gas Separation-tune pH value-electric flocculation-one-level physico-chemical precipitation clarification-electrocatalytic oxidation drop
- bis- grades of physico-chemical precipitation clarification-device for separating mud and water-discharges or recycling are solved, can be realized the fracturing outlet liquid once
Property carry out oily recovery, water process, three functions of mud solidification, realize qualified discharge or the re-injection application of fracturing outlet liquid, realize
The purpose of recycling, has great social and economic significance to the pollutant of oil drilling, can both reduce the pressure break
The transport of liquid, storage, processing cost, and resourcebility recycling, regard the water as other purposes on well.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of oilfield drilling fracturing outlet liquid processing method.
Fig. 2 is the schematic diagram of oilfield drilling fracturing outlet liquid processing equipment.
Embodiment
It refer to Fig. 1, oilfield drilling fracturing outlet liquid processing method, comprising：
Step (1), Oil-gas Separation step separates the profit of fracturing outlet liquid, reclaims the oil isolated；In specific steps：
The fracturing outlet liquid is pumped into the separation container with bubble generator through sewage pump, and fracturing outlet liquid flows into separation container, point
The microbubble produced from the electric air floating device in container rises with the fine oily strain being blended in liquid floats to liquid level, the oil of liquid level
Skimmed in the oil guide groove being located at around separation container upper shed to handle recovery by microbubble, separate fuel-displaced fracturing outlet liquid and take out
It is discharged to next step processing；
Step (2), adjusts pH value step, should by adding the pH value of the fuel-displaced fracturing outlet liquid of chemical material regulation separation
Chemical material such as iron hydroxide；
Step (3), electric flocculation step will adjust the fracturing outlet liquid after pH value to send into electric flocculation container, the electric flocculation container
Interior to be provided with first electrode group, first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, both makes pressure
Split and return discharge opeing generation degraded oxidation reaction .OH ions and electrode ionization synthetic flocculant, flocculant and fracturing outlet liquid are made again
Generation flocculation reaction and harmful substance in fracturing outlet liquid is flocculated into wadding, and then precipitate in case processing；
Step (4), one-level physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electric flocculation step in add flocculant and
At least one of coagulant, makes fracturing outlet liquid physico-chemical precipitation realize clarification；At least one added in flocculant and coagulant
The regulation of pH value can also be realized by planting；The flocculant such as iron hydroxide；
Step (5), electrocatalytic oxidation step produces electrocatalysis oxidation reaction, to produce .OH ions .OH ion damageds and
Interrupt the macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, the degraded of small molecule nuisance is in oxide
And realize innoxious；
Step (6), two grades of physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electrocatalytic oxidation sewage step in add
At least one of flocculant and coagulant, make fracturing outlet liquid physico-chemical precipitation realize further clarification；Add flocculant and mixed
At least one of solidifying agent can also realize the regulation of pH value；
Step (7), mud-water separation step isolates the sludge precipitated, and press filtration processing sludge.Specifically include：Step
Rapid 71, electric flocculation step, one-level physico-chemical precipitation clarification steps, electrocatalytic oxidation step, two grades of physico-chemical precipitation clarification steps precipitations
Sludge feeding sludge condensation, such as concentration basin, the upper water that concentration basin sludge is isolated after standing is sent back to electrocatalytic oxidation
Step carries out electrocatalysis oxidation reaction；Step 72, press filtration is carried out to the sludge after concentration and produces mud cake, the press filtration water of generation is sent
Telegram in reply catalytic oxidation stage carries out electrocatalysis oxidation reaction.
Fig. 2 is refer to, oilfield drilling fracturing outlet liquid processing equipment includes gas and oil separating plant 10, electric flocculation device
20th, the first physico-chemical precipitation clarifier 30, electrocatalysis oxidation apparatus 40, the second physico-chemical precipitation clarifier 50 and mud-water separation dress
Put 60.
The gas and oil separating plant 10, separates the profit of fracturing outlet liquid, reclaims the oil isolated.
The electric flocculation device 20, including electric flocculation container and the first electrode group being located in electric flocculation container, electric flocculation are held
Device connects gas and oil separating plant, and first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, both makes
Fracturing outlet liquid produces degraded oxidation reaction, makes the degraded oxidation reaction of macromolecular and chemical substance .OH ions and electrode are made again
Synthetic flocculant is ionized, flocculant occurs flocculation reaction with fracturing outlet liquid and harmful substance in fracturing outlet liquid is flocculated into
Wadding, and then precipitate in case processing；The structure of the electric flocculation device can refer to the applicant's earlier application《For sewage disposal
Electric flocculation device and method》.The electric flocculation device uses the three-diemsnional electrode of extra specific surface area, and fracturing outlet liquid compares table in super large
The degraded oxidation reaction of macromolecular and chemical substance is realized under the three-diemsnional electrode effect of area, and makes its chemical composition and is degraded
The formation of macromolecular substances and three-diemsnional electrode material catalytic reaction can be flocculated the micrograined texture of agent absorption, and be deposited and remove.
The first physico-chemical precipitation clarifier 30, including the first Fining vessel and the first chemicals dosing plant, first clarification are held
Device connects electric flocculation container, and first chemicals dosing plant connects the first Fining vessel with can be toward adding flocculant in the first Fining vessel
At least one of with coagulant, fracturing outlet liquid enters physico-chemical precipitation clarifier after being cracked by electric flocculation device, at this
Precipitated and clarified in the presence of flocculant in device, so that fracturing outlet liquid physico-chemical precipitation realizes clarification.As needed,
Also include first agitating device being located in the first Fining vessel, realized and stirred by the first agitating device.
The electrocatalysis oxidation apparatus 40, including process container and the electrocatalysis oxidation apparatus that is located in process container, at this
Manage container and connect the first Fining vessel, the electrocatalysis oxidation apparatus produces electrocatalysis oxidation reaction, to produce .OH ions .OH from
Son destroys and interrupts the macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, the degraded of small molecule nuisance
Realized in oxide innoxious.In the first physico-chemical precipitation clarifier, liquid also contains a large amount of small molecule things after the clarification
Matter, its COD index fails to meet environmental requirement, and this electrocatalysis oxidation apparatus can carry out depth degradation to up to standard to it.
The second physico-chemical precipitation clarifier 50, including the second Fining vessel and the second chemicals dosing plant, second clarification are held
Device connects process container, second chemicals dosing plant connect the second Fining vessel with can toward add in the second Fining vessel flocculant with
At least one of coagulant, so that fracturing outlet liquid physico-chemical precipitation realizes further clarification, reaching after now being clarified through precipitation
Mark water can be discharged or recycling.
The device for separating mud and water 60 includes a concentration ground 61 and a sludge press filtration device 62；The electric flocculation device, one-level thing
Change precipitation clarifier, electrocatalysis oxidation apparatus, the sludge of two grades of physico-chemical precipitation clarifier precipitations to be pumped into dirt by sludge pump
Mud concentration ground 61；The sludge press filtration device 62 includes filter press, press filtration processing sludge condensation 61 sludge into mud cake, in order to
Collection neutralizes outward transport and focused on；It is another set water pump by sludge condensation 61 upper water and the press filtration water pumpback that is press-filtered out of filter press extremely
Electrocatalysis oxidation apparatus.
The Oil Water Sludge Separation device concrete structure is such as：Including separation container, oil guide groove, electric air floating device and trapped fuel device,
The oil guide groove is installed in around separation container upper shed, and the separation container is provided with separation water inlet and separation delivery port, and this is electric
Floating device is located in separation container can produce microbubble, and the fracturing outlet liquid flows into separation container by separating water inlet, should
The microbubble that electric air floating device is produced rises with the fine oily strain being blended in liquid floats to liquid level, and the oil of liquid level is skimmed by microbubble
Enter in oil guide groove to handle recovery, the separation delivery port connects electric flocculation container.In concrete structure：The oil guide groove is installed in separation
To surround separation container upper shed around container upper shed.Among the present embodiment：The oil guide groove is held as being fixed in separation including one
Ring wall and a periphery wall upwardly extended by ring wall outer peripheral edge around device wall, between separation container wall, ring wall, the periphery wall
Oil guide groove is constituted, and periphery wall upper port is located on the wall upper port of separation container.What the oil of importing oil guide groove was taken out of
It is pending that water is pumped to next workshop section (in electric flocculation container) by moisture content by electric pump.The separation water inlet can be to be located at separation container
The middle part of wall, or including feed tube, in the liquid in the supreme down insertion separation container of feed tube, feed liquor infratubal port
Under the liquid level of liquid in device.As needed, may also include ventilation unit, ventilation unit be located at the top of separation container with
Accelerate gas discharge.Wherein：Oil guide groove connects trapped fuel device, and oil enters oil guide groove and flows to the trapped fuel device being located at outside equipment
(such as bucket, tank, groove, pipe).The electric air floating device, including the electrical generating means of microbubble and help floating air micro-bubbles to occur
Device.
The electrocatalysis oxidation apparatus, including process container and the electrocatalysis oxidation apparatus being located in process container, the processing
Container connects electric flocculation water outlet of container, and the electrocatalysis oxidation apparatus produces electrocatalysis oxidation reaction, to produce .OH hydroxyl frees
Base (.OH ions) .OH hydroxyl radical free radicals destroy and interrupt the macromolecular structure of nuisance in sewage and it is degraded into small point
Son, the degraded of small molecule nuisance is realized innoxious in oxide, and sewage is degraded to requiring by electrocatalysis oxidation reaction
Index, that directly outer row or can use as reinjected water；The degraded delivery port of the electrocatalytic oxidation sewage device connects second
Fining vessel.As needed, exhaust ventilator is may also include, the exhaust ventilator is located at the top of process container, to realize ventilation,
The gas produced in discharge course of reaction.As needed, the oil-drain pipe of discharge top layer oil slick is may also include, the oil-drain pipe connects
Logical process container, correspondence sewage level, to discharge the oil slick for floating on liquid level.As needed, one or more groups of series connection cloth can be set
Put, liquid is sequentially passed through multigroup electrocatalysis oxidation apparatus.
First electrode group in the electric flocculation device includes the two electrode baskets being made of insoluble petal material, the electrode
Basket offers mesh, and the two electrodes basket can be conductively connected power positive cathode respectively, and the electrode basket, which is used for placement, can be electrolysed as electrode
The electrode particle of ion；Wherein：The electrode basket obtains electric energy, and electrode particle electrolysis is electrode ion.
Preferably, the electric flocculation device also include one the 3rd chemicals dosing plant, the 3rd chemicals dosing plant connect electric flocculation container with
Can be toward addition chemical material regulation pH value in electric flocculation container.
As needed, electric-control system 70, control connection gas and oil separating plant 10, electric flocculation device 20, first be may also include
Physico-chemical precipitation clarifier 30, electrocatalysis oxidation apparatus 40, the second physico-chemical precipitation clarifier 50 and device for separating mud and water 60, are used
In realizing stop of the fracturing outlet liquid between each process unit, the work such as reaction time, pump drainage, ventilation is automatically controlled.
Above-mentioned pH value is adjusted to 7 or so.
It is described above, only present pre-ferred embodiments, therefore the scope that the present invention is implemented can not be limited according to this, i.e., according to
The equivalent changes and modifications that the scope of the claims of the present invention and description are made, all should still belong in the range of the present invention covers.
Claims (6)
1. oilfield drilling fracturing outlet liquid processing method, it is characterised in that：Comprising：
Step (1), Oil-gas Separation step separates the profit of fracturing outlet liquid, reclaims the oil isolated；
Step (2), adjusts pH value step, the pH value of the fuel-displaced fracturing outlet liquid of regulation separation；
Step (3), electric flocculation step is adjusted and is provided with the fracturing outlet liquid feeding electric flocculation container after pH value, the electric flocculation container
First electrode group, first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, pressure break is returned row
Liquid produces degraded oxidation reaction .OH ions and electrode ionization synthetic flocculant is made again, flocculant is wadded a quilt with cotton with fracturing outlet liquid
Coagulate reaction and harmful substance in fracturing outlet liquid is flocculated into wadding, and then precipitate in case processing；
Step (4), one-level physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electric flocculation step in add flocculant and coagulation
At least one of agent, makes fracturing outlet liquid physico-chemical precipitation realize clarification；
Step (5), electrocatalytic oxidation step produces electrocatalysis oxidation reaction, to produce .OH ions .OH ion damageds and interrupts
The macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, small molecule nuisance degraded reality in oxide
It is existing innoxious；
Step (6), two grades of physico-chemical precipitation clarification steps, toward the fracturing outlet liquid through electrocatalytic oxidation sewage step in add flocculation
At least one of agent and coagulant, make fracturing outlet liquid physico-chemical precipitation realize further clarification；
Step (7), mud-water separation step isolates the sludge precipitated, and press filtration processing sludge.
2. oilfield drilling fracturing outlet liquid processing method according to claim 1, it is characterised in that：The Oil-gas Separation is walked
In rapid, the microbubble that the electric air floating device that fracturing outlet liquid is flowed into separation container, separation container is produced is with being blended in liquid
Interior fine oily strain, which rises, floats to liquid level, liquid level oil skimmed by microbubble in the oil guide groove being located at around separation container upper shed with
Processing is reclaimed, and is separated fuel-displaced fracturing outlet liquid and is pumped to next step processing.
3. oilfield drilling fracturing outlet liquid processing equipment, it is characterised in that：Comprising：
Gas and oil separating plant, separates the profit of fracturing outlet liquid, reclaims the oil isolated；
Electric flocculation device, including electric flocculation container and the first electrode group being located in electric flocculation container, electric flocculation container connect oil
Air separation, first electrode group obtains electrolysis in electric energy, liquid and separates out .OH ions, and obtains electrode ion, pressure break is returned row
Liquid produces degraded oxidation reaction .OH ions and electrode ionization synthetic flocculant is made again, flocculant is wadded a quilt with cotton with fracturing outlet liquid
Coagulate reaction and harmful substance in fracturing outlet liquid is flocculated into wadding, and then precipitate in case processing；
First physico-chemical precipitation clarifier, including the first Fining vessel and the first chemicals dosing plant, first Fining vessel connect electricity
Flocculate container, and first chemicals dosing plant connects the first Fining vessel with can be toward addition flocculant and coagulant in the first Fining vessel
At least one of, so that fracturing outlet liquid physico-chemical precipitation realizes clarification；
Electrocatalysis oxidation apparatus, including process container and the electrocatalysis oxidation apparatus being located in process container, the process container connect
Logical first Fining vessel, the electrocatalysis oxidation apparatus produces electrocatalysis oxidation reaction, to produce .OH ions .OH ion damageds and
Interrupt the macromolecular structure of nuisance in fracturing outlet liquid and it is degraded into small molecule, the degraded of small molecule nuisance is in oxide
And realize innoxious；
At second physico-chemical precipitation clarifier, including the second Fining vessel and the second chemicals dosing plant, the second Fining vessel connection
Manage container, second chemicals dosing plant connects the second Fining vessel with can be toward in addition flocculant and coagulant in the second Fining vessel
At least one so that fracturing outlet liquid physico-chemical precipitation realizes further clarification；And
Sludge press filtration device, including filter press, the sludge that press filtration processing clarification precipitates.
4. oilfield drilling fracturing outlet liquid processing equipment according to claim 3, it is characterised in that：The Oil Water Sludge Separation
Device, including separation container, oil guide groove and electric air floating device, the oil guide groove are installed in around separation container upper shed, the separation
Container is located in separation container can produce microbubble provided with separation water inlet and separation delivery port, the electric air floating device, the pressure
Split and return discharge opeing and flow into separation container by separating water inlet, the microbubble that the electric air floating device is produced is with being blended in liquid
Fine oily strain, which rises, floats to liquid level, and the oil of liquid level is skimmed to handle recovery in oil guide groove by microbubble, and the separation delivery port connects electricity
Flocculate container.
5. oilfield drilling fracturing outlet liquid processing equipment according to claim 3, it is characterised in that：The electric flocculation device
Interior first electrode group includes the two electrode baskets being made of insoluble petal material, and the electrode basket offers mesh, two electricity
Pole basket can be conductively connected power positive cathode respectively, and the electrode basket, which is used to place, can be electrolysed the electrode particle for electrode ion；Wherein：
The electrode basket obtains electric energy, and electrode particle electrolysis is electrode ion.
6. oilfield drilling fracturing outlet liquid processing equipment according to claim 3, it is characterised in that：The electric flocculation device
Also include one the 3rd chemicals dosing plant, the 3rd chemicals dosing plant connects electric flocculation container with can be toward adding chemistry material in electric flocculation container
The pH value of material regulation fracturing outlet liquid.
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