CN106430746A - Process for pretreating natural gas produced water with electric flocculation - Google Patents
Process for pretreating natural gas produced water with electric flocculation Download PDFInfo
- Publication number
- CN106430746A CN106430746A CN201610751637.3A CN201610751637A CN106430746A CN 106430746 A CN106430746 A CN 106430746A CN 201610751637 A CN201610751637 A CN 201610751637A CN 106430746 A CN106430746 A CN 106430746A
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- CN
- China
- Prior art keywords
- electric flocculation
- water outlet
- gas exploitation
- technique
- natural gas
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/46—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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
Abstract
The invention relates to a process for treating natural gas produced water, in particular to a process for pretreating natural gas produced water with electric flocculation. The process comprises the following steps: a, adjusting the pH value of natural gas produced water to 7-8; b, performing electric flocculation on the natural gas produced water after adjusting the pH value through electric flocculation equipment; c, filtering the natural gas produced water after electric flocculation, to remove flocculation sediments. For the natural gas produced water containing complex components and more colloidal suspended substances, the treatment process of the pretreatment method can remove the vast majority of colloidal and suspended substances, is simple in process operation, unnecessary to add any chemical agent, high in treatment efficiency, good in effect, low in cost, small in equipment size, easy to achieve automated management, and small in amount of mud produced during reaction.
Description
Technical field
The present invention relates to the handling process of Gas Exploitation water outlet is and in particular to a kind of adopt electric flocculation pretreatment Gas Exploitation
The technique of water outlet.
Background technology
Gas Exploitation water outlet is to be extracted with natural gas, and after aqueous vapor separation and processed, abjection is useless
Water.Gas Exploitation effluent quality complicated component, because gas field geographical position and exploitation, the difference of refining process and have larger difference
Not.This kind of waste water mainly adopts deep-well re-injection after simple process at present, but still suffers from being limited by individual well re-injection amount, freight
Height, descends gas-bearing formation exploitation to produce the factors such as impact over the ground.Oil gas field high slat-containing wastewater intractability is big, and oil and natural gas enterprise exists
There is provided and while a large amount of clean energy resourcies and industrial chemicals, also create serious environmental pollution.How effectively to administer exploitation and use
The environmental pollution causing during oil, it has also become the important topic that field of Environment Protection faces.Need to develop further and be applied to stone
The handling process of oily Gas Industry high salt extracted waste water, improves reclamation rate after the process of Oil/gas Well recovered water, reduces existing place
The environmental protection risk of reason mode and operating cost.
Content of the invention
For above the deficiencies in the prior art, the invention provides a kind of environmental protection, Gas Exploitation water outlet can be removed very well
Colloidal suspended substance, the technique of the pretreatment Gas Exploitation water outlet of impurity such as Organic substance.
In order to achieve the above object, the invention provides a kind of technique of employing electric flocculation pretreatment Gas Exploitation water outlet,
Comprise the following steps：
A, the pH value of Gas Exploitation water outlet is adjusted to 7～8；
B, electric flocculation equipment is passed through in Gas Exploitation water outlet after overregulating for the pH value, carry out electric flocculation；
C, the Gas Exploitation after electric flocculation is gone out water filtration, remove flocculating sedimentation thing.
Preferably, in described step a, the pH value of Gas Exploitation water outlet is adjusted to 7.2～7.6.
Preferably, in described step b, electric flocculation equipment is flow-type, and its battery lead plate is aluminium sheet or iron plate, effecting reaction face
Amass as 100～300cm2.
Preferably, the distance between the minus plate of described electric flocculation and positive plate are 20～50mm, the connected mode of electrode
For multipole connected mode, and the spaced multigroup distribution in electric flocculation equipment of yin, yang pole plate.
Preferably, current intensity during Gas Exploitation water outlet electric flocculation is 6～12A.
Preferably, current intensity during Gas Exploitation water outlet electric flocculation is 6～9A.
Preferably, the time in electric flocculation for the Gas Exploitation water outlet is 9～11min.
Preferably, in step c, by before the Gas Exploitation of electric flocculation goes out water filtration, first staticly settling 20～
40min.
Preferably, after staticly settling, the suspension foam on liquid level is struck off, then carry out flocculating sedimentation again, then use plate
Frame Filter Press, gained filtrate is the good waste water of pretreatment.
Beneficial effects of the present invention are：Technique scheme is that a kind of dependence additional power source energising is electrolysed to waste water
The electrochemical treatments mode of reason, its reaction principle is with metal as anode, and in the presence of unidirectional current, anode is dissoluted, and produces
Metal ion, through a series of hydrolysis, polymerization and oxidizing process, develops into various hydroxo complexes, multinuclear hydroxo complex
So that hydroxide, make colloidal state impurity in waste water, suspended impurity coagulative precipitation and separation；Meanwhile, powered polluter
Grain swimming in the electric field, its Partial charge is neutralized by electrode and promotes it to take off steady coagulation；And the bubble producing in negative electrode has air supporting
, also there is redox reaction in electrolytic process in detached effect, can remove partial organic substances.
In technique scheme main reaction be flocculation sediment, dissolved air flotation, oxidoreduction these three, by electrochemistry,
Chemical coagulation and three kinds of technology of electric floating are effectively combined；For complicated component, the more natural gas of colloidal suspended substance
Recovered water, can remove most colloids and suspended material using technique scheme, and technological operation is simple, need not add and appoint
What chemical agent, treatment effeciency is fast, and effect is good, low cost, and equipment volume is little, easily realizes automated management, and reaction sludge output is few.
Specific embodiment
For making those skilled in the art understand production technology and the technique effect of the present invention in detail, produced with specific below
Example is being further described application and the technique effect of the present invention.
Embodiment 1
The pH value of Gas Exploitation water outlet is adjusted to 7, and installs a size of surface area in mobile electric flocculation equipment
For 100mm2Aluminium sheet, plate spacing 20mm, the connected mode of electrode is multipole connected mode, and yin, yang pole plate is in a cell
Spaced multigroup distribution.Waste water is squeezed in electric flocculation equipment by turn on pump, starting impulse power supply, and regulation current intensity is 6A, so
After start electric flocculation reaction, the setting response time be 9min；After the completion of reaction, waste water staticly settles 20min, then adopts sheet frame
Filter Press, filtrate is the good recovered water of pretreatment.
Embodiment 2
The pH value of Gas Exploitation water outlet is adjusted to 7.2, and installs a size of 274mm in mobile electric flocculation equipment
× 72mm × 2mm, surface area are 170mm2Aluminium sheet, plate spacing 30mm, the connected mode of electrode is multipole connected mode, and
The spaced multigroup distribution in a cell of yin, yang pole plate.Waste water is squeezed in electric flocculation equipment by turn on pump, starting impulse power supply,
Regulation current intensity is 9A, then starts electric flocculation reaction, and the setting response time is 10min；After the completion of reaction, waste water standing is heavy
Shallow lake 30min, then adopts filter press to filter, filtrate is the good recovered water of pretreatment.
Embodiment 3
The pH value of Gas Exploitation water outlet is adjusted to 7.6, and installs a size of surface in mobile electric flocculation equipment
Amass as 200mm2Aluminium sheet, plate spacing 35mm, the connected mode of electrode is multipole connected mode, and yin, yang pole plate is in electrolysis bath
In spaced multigroup distribution.Waste water is squeezed in electric flocculation equipment by turn on pump, starting impulse power supply, and regulation current intensity is 9A,
Then start electric flocculation reaction, the setting response time is 10min；After the completion of reaction, waste water staticly settles 30min, then adopts
Filter press filters, and filtrate is the good recovered water of pretreatment.
Embodiment 4
The pH value of Gas Exploitation water outlet is adjusted to 8, and installs a size of surface area in mobile electric flocculation equipment
For 250mm2Aluminium sheet, plate spacing 40mm, the connected mode of electrode is multipole connected mode, and yin, yang pole plate is in a cell
Spaced multigroup distribution.Waste water is squeezed in electric flocculation equipment by turn on pump, starting impulse power supply, and regulation current intensity is 12A, so
After start electric flocculation reaction, the setting response time be 11min；After the completion of reaction, waste water staticly settles 40min, then adopts plate
Frame Filter Press, filtrate is the good recovered water of pretreatment.
Embodiment 5
The pH value of Gas Exploitation water outlet is adjusted to 7.6, and installs a size of surface in mobile electric flocculation equipment
Amass as 300mm2Aluminium sheet, plate spacing 50mm, the connected mode of electrode is multipole connected mode, and yin, yang pole plate is in electrolysis bath
In spaced multigroup distribution.Waste water is squeezed in electric flocculation equipment by turn on pump, starting impulse power supply, and regulation current intensity is 12A,
Then start electric flocculation reaction, the setting response time is 10min；After the completion of reaction, waste water staticly settles 40min, then adopts
Filter press filters, and filtrate is the good recovered water of pretreatment.
Each sample in waste water after treatment from embodiment 1～5, be respectively designated as sample 1, sample 2, sample 3,
Sample 4, sample 5, then carry out the detection of turbidity and colloidal content to the sample sampling and undressed Gas Exploitation water outlet
Analysis, such as table 1 below.
Table 1
| Sample | Turbidity (NTU) | Colloid (g/L) | Turbidity removal rate (%) | Colloid clearance (%) |
| Gas Exploitation water outlet | 27.4 | 1.165 | / | / |
| Sample 1 | 5.0 | 0.136 | 81.75 | 88.33 |
| Sample 2 | 2.9 | 0.0882 | 89.42 | 92.43 |
| Sample 3 | 2.3 | 0.0676 | 91.61 | 94.20 |
| Sample 4 | 1.6 | 0.0404 | 94.16 | 96.53 |
| Sample 5 | 2.1 | 0.0569 | 92.34 | 95.12 |
By table 1, Gas Exploitation water outlet is processed using technical scheme provided by the present invention, Ke Yiyou
Effect ground removes the colloid in Gas Exploitation water outlet and reduces its turbidity, and electric flocculation method pretreatment Gas Exploitation water outlet is also described simultaneously
Anti- load-bearing capacity strong, it is fast to reach speed, efficiency high, the requirement of low cost.
Claims (9)
1. a kind of technique using electric flocculation pretreatment Gas Exploitation water outlet is it is characterised in that comprise the following steps：
A, the pH value of Gas Exploitation water outlet is adjusted to 7～8；
B, electric flocculation equipment is passed through in Gas Exploitation water outlet after overregulating for the pH value, carry out electric flocculation；
C, the Gas Exploitation after electric flocculation is gone out water filtration, remove flocculating sedimentation thing.
2. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 1 technique it is characterised in that：Described step
In rapid a, the pH value of Gas Exploitation water outlet is adjusted to 7.2～7.6.
3. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 1 technique it is characterised in that：Described step
In rapid b, electric flocculation equipment is flow-type, and its battery lead plate is aluminium sheet or iron plate, and effective affecting acreage is 100～300cm2.
4. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 3 technique it is characterised in that：Described electricity
The distance between the minus plate of flocculation and positive plate are 20～50mm, and the connected mode of electrode is multipole connected mode, and yin, yang
Pole plate spaced multigroup distribution in electric flocculation equipment.
5. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 4 technique it is characterised in that：Natural gas
Current intensity during recovered water electric flocculation is 6～12A.
6. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 5 technique it is characterised in that：Natural gas
Current intensity during recovered water electric flocculation is 6～9A.
7. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 6 technique it is characterised in that：Natural gas
The time in electric flocculation for the recovered water is 9～11min.
8. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 1 technique it is characterised in that：Step c
In, by before the Gas Exploitation of electric flocculation goes out water filtration, first staticly settle 20～40min.
9. employing electric flocculation pretreatment Gas Exploitation water outlet according to claim 8 technique it is characterised in that：Standing is heavy
Behind shallow lake, the suspension foam on liquid level is struck off, then carry out flocculating sedimentation again, then filtered with filter press, gained filtrate
It is the good waste water of pretreatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751637.3A CN106430746A (en) | 2016-08-29 | 2016-08-29 | Process for pretreating natural gas produced water with electric flocculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610751637.3A CN106430746A (en) | 2016-08-29 | 2016-08-29 | Process for pretreating natural gas produced water with electric flocculation |
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| Publication Number | Publication Date |
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| CN106430746A true CN106430746A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610751637.3A Pending CN106430746A (en) | 2016-08-29 | 2016-08-29 | Process for pretreating natural gas produced water with electric flocculation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311375A (en) * | 2017-06-02 | 2017-11-03 | 四川兴澳环境技术服务有限公司 | Low concentration Produced Water In Oil-gas Fields, Ngi Zero discharge treatment method |
| CN107324458A (en) * | 2017-08-01 | 2017-11-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of fracturing outlet liquid electric flocculation pretreatment unit and method |
| CN109133404A (en) * | 2017-06-16 | 2019-01-04 | 江苏立业环境科技有限公司 | A kind of gas drilling waste water treatment process |
| CN111573921A (en) * | 2020-06-01 | 2020-08-25 | 中国石油工程建设有限公司 | Method for treating mercury-containing gas field water |
| US11287271B2 (en) | 2017-02-10 | 2022-03-29 | Beijing Qisheng Science And Technology Co., Ltd. | Systems and methods for vehicle sharing service |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329989A (en) * | 2015-11-01 | 2016-02-17 | 华南理工大学 | Electric flocculation method for pretreating high-concentration polluted wastewater of glyphosate |
-
2016
- 2016-08-29 CN CN201610751637.3A patent/CN106430746A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105329989A (en) * | 2015-11-01 | 2016-02-17 | 华南理工大学 | Electric flocculation method for pretreating high-concentration polluted wastewater of glyphosate |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11287271B2 (en) | 2017-02-10 | 2022-03-29 | Beijing Qisheng Science And Technology Co., Ltd. | Systems and methods for vehicle sharing service |
| CN107311375A (en) * | 2017-06-02 | 2017-11-03 | 四川兴澳环境技术服务有限公司 | Low concentration Produced Water In Oil-gas Fields, Ngi Zero discharge treatment method |
| CN109133404A (en) * | 2017-06-16 | 2019-01-04 | 江苏立业环境科技有限公司 | A kind of gas drilling waste water treatment process |
| CN107324458A (en) * | 2017-08-01 | 2017-11-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of fracturing outlet liquid electric flocculation pretreatment unit and method |
| CN107324458B (en) * | 2017-08-01 | 2023-10-17 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Electric flocculation pretreatment device and method for fracturing flowback fluid |
| CN111573921A (en) * | 2020-06-01 | 2020-08-25 | 中国石油工程建设有限公司 | Method for treating mercury-containing gas field water |
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Application publication date: 20170222 |
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