CN101113031A - Method for treating oil field wastewater by electro-float process - Google Patents

Method for treating oil field wastewater by electro-float process Download PDF

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Publication number
CN101113031A
CN101113031A CNA2006100294509A CN200610029450A CN101113031A CN 101113031 A CN101113031 A CN 101113031A CN A2006100294509 A CNA2006100294509 A CN A2006100294509A CN 200610029450 A CN200610029450 A CN 200610029450A CN 101113031 A CN101113031 A CN 101113031A
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CN
China
Prior art keywords
oil
water
electro
waste water
wastewater
Prior art date
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.)
Pending
Application number
CNA2006100294509A
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Chinese (zh)
Inventor
翁天波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHONGYOU ENTERPRISE GROUP CO Ltd SHANGHAI
Original Assignee
ZHONGYOU ENTERPRISE GROUP CO Ltd SHANGHAI
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by ZHONGYOU ENTERPRISE GROUP CO Ltd SHANGHAI filed Critical ZHONGYOU ENTERPRISE GROUP CO Ltd SHANGHAI
Priority to CNA2006100294509A priority Critical patent/CN101113031A/en
Publication of CN101113031A publication Critical patent/CN101113031A/en
Pending legal-status Critical Current

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Abstract

The invention relates to wastewater treatment technique field. The electro-floatation method of the invention for the treatment of oil field waste water comprises the steps: a. the oil field waste water comes into a pretreatment area of an electro-floatation device with a scale of 200 - 500 m3/d, and goes through a baffle, comes into an inclined plate precipitation area, to dramatically cut down the oil content in waste water; b. the waste water being pretreated in the pretreatment area of step (a) continuously comes into the electro-floatation area provided with electrode plates to be treated, and the treating condition is: delaying time 5- 30min, current intensity 6000- 15000 A, voltage 3.5 V, and qualified treated water can be acquired.

Description

A kind of method for the treatment of oil field wastewater by electro-float process
Technical field
The present invention relates to a kind of wastewater treatment technique field.
Background technology
In oil-field development, oil field later stage particularly, the oil field will produce a large amount of recovered waters, for many years, the technology pattern of a mouthful oil removing section (oil removing ten secondary oil removings) ten fillter sections is mainly adopted in domestic oil field to produced water disposal, wherein " oil removing section " adopts following method substantially: (1) physics method is primarily aimed at the oil slick in the former water: (2) chemical method mainly solves the mark oil in the former water; (3) coarse method is primarily aimed at the dispersed oil in the former water; (4) the stream partition method is mainly removed the oil slick in the former water; (5) the quick air soluble method of air supporting, revulsion are mainly removed oil slick and dispersed oil in the former water.
Aforesaid method is obtained certain effect to the processing of the recovered water in each oil field, and is still along with the raising of injection water quality standard, more and more higher to the requirement of " oil removing section ".The many weak points that exposed in the various treatment processs can not adapt to on-the-spot requirement.Fall as, the physics method only can be removed oil slick and the macrobead suspended substance in the former water, still need increase the secondary oil removal plant: chemical method can only solve dispersed oil and the small granular suspended matters in the former water, oil removal plant of front end is had relatively high expectations, the factor that restricts the normal operation that adds pharmacy work simultaneously is more, is difficult to meet design requirement; The coarse method, higher to the import water quality requirement, treatment effect is difficult to satisfy follow-up filtration unit requirement; The effect of cyclonic separation method removal suspended substance is relatively poor; Air supporting method (induce flotation, spray flotation), mechanical part is many, and energy consumption is higher, less stable, maintenance capacity is big.
In addition, practice explanation for many years, it is whether normal that medicament adds work is one of important factor of determining the produced water disposal effect, also is the lower where the shoe pinches of the long-term water quality reaching standard rate in each oil field.All need add various chemical medicaments in each Oilfield using water technology at present, and at the scene in the actual mechanical process, be that screening, the dosage of medicament, the control that adds point, dosing method, cost, on-the-spot each link such as preparation all may influence treatment effect, make the water quality can not be up to standard.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose a kind of method for the treatment of oil field wastewater by electro-float process.
The method for the treatment of oil field wastewater by electro-float process of the present invention may further comprise the steps:
A. the oil field waste scale of entering is the electric floating device pretreating zone of 200-500m3/d, by plate washer, enters the sloping plate deposition district, to reduce the waste water oleaginousness significantly;
B. the waste water after step a pretreating zone is handled enters the electric floating region processing that is provided with battery lead plate continuously, and its treatment condition are: residence time 5-30min, strength of current 6000-15000A, voltage 3.5V obtain the qualified oil field extracted water of water quality at last.
Beneficial effect of the present invention: method of the present invention can realize that electric floating oil removing and electrolytic sterilizing are integrated, and oil removal rate is greater than 90%, and the degerming rate is greater than 99%.According to the pneumatically supported principle of electricity: electric floating in the hydrogen gas bubbles diameter be generally 10-30pm, bubble diameter such as oxygen, chlorine is 20-60um, microbubble has very high specific surface area, tiny oil droplets and suspended substance in can planar water, arrive several thousandths because the density of microbubble only be the hundreds of of the density of water, be easy to oil droplet and suspended substance be isolated water body and remove; Multiple strong oxidizing property materials such as anode produces oxygen, chlorine have stronger germicidal action, and chlorination is not realized the sterilization purpose.In oil field extracted water, on average at 4000.10 ten thousand m/l, specific conductivity is bigger for salinity, uses electricly can regulate the relation that the pole piece spacing changes voltage and current density when floating, needn't add medicament again and regulate specific conductivity, has certain advantage during use; Use electric float method can remove suspended substance and oil slick, dispersed oil effectively, use flocculation agent or add flotation agent, can also remove dispersed oil and be partly dissolved oil: owing to contain a large amount of chlorions in the recovered water, thereby, discharge a large amount of chlorine at electrode and reach the sterilization purpose, therefore, the present invention can guarantee under the effluent quality prerequisite up to standard, solved " bottleneck " problem that each oil-field water of the restriction whole nation is handled, when realizing to add various medicaments in the wastewater treatment process, reduce processing cost significantly, simplified requirement execute-in-place.
Embodiment
Further describe the present invention by the following examples.
Oil field extracted water with oleaginousness 53.90mg/L is tested, oil field waste specifically flows to: oil field waste at first enters the cloth pool by water inlet pipe, climb over baffle plate then, enter swash plate, make oily(waste)water at the swash plate sharp separation, most of oil slick floats to the oil-collecting bag, other dispersed oil and part oil slick water flow through the voltage stabilizing district and enter electric floating region, its operational condition: unit scale Q=200500m3/d, residence time 5-30rain, strength of current 5 (X) 0---15000A, voltage 3-5V, produce a large amount of micro bubbles at electrode, oil slick in the sewage, most of dispersed oil and part oil in water emulsion fat vacuole come-up, sticking float on the micro bubble and brought to the water surface, oil slick enters the oil-collecting bag, and the sewage after the processing is taken device by effluent trough or pipe out of by rising pipe.Display effect is fine as a result, and the water quality of coming out at last is qualified.

Claims (1)

1. the method for the treatment of oil field wastewater by electro-float process of the present invention may further comprise the steps:
A. the oil field waste scale of entering is the electric floating device pretreating zone of 200-500m3/d, by plate washer, enters the sloping plate deposition district, to reduce the waste water oleaginousness significantly;
B. the waste water after step a pretreating zone is handled enters the electric floating region processing that is provided with battery lead plate continuously, and its treatment condition are: residence time 5-30min, strength of current 6000-15000A, voltage 3.5V obtain the qualified oil field extracted water of water quality at last.
CNA2006100294509A 2006-07-27 2006-07-27 Method for treating oil field wastewater by electro-float process Pending CN101113031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2006100294509A CN101113031A (en) 2006-07-27 2006-07-27 Method for treating oil field wastewater by electro-float process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2006100294509A CN101113031A (en) 2006-07-27 2006-07-27 Method for treating oil field wastewater by electro-float process

Publications (1)

Publication Number Publication Date
CN101113031A true CN101113031A (en) 2008-01-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2006100294509A Pending CN101113031A (en) 2006-07-27 2006-07-27 Method for treating oil field wastewater by electro-float process

Country Status (1)

Country Link
CN (1) CN101113031A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105000727A (en) * 2015-09-02 2015-10-28 波鹰(厦门)科技有限公司 Oil-field wastewater treating and recycling device
CN105130069A (en) * 2015-09-02 2015-12-09 波鹰(厦门)科技有限公司 High-salt oil producing waste water treatment and recycling device
CN107226578A (en) * 2016-03-24 2017-10-03 长江三星能源科技股份有限公司 One kind is used for offshore oilfield polymer-bearing waste-water reinjection treatment method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105000727A (en) * 2015-09-02 2015-10-28 波鹰(厦门)科技有限公司 Oil-field wastewater treating and recycling device
CN105130069A (en) * 2015-09-02 2015-12-09 波鹰(厦门)科技有限公司 High-salt oil producing waste water treatment and recycling device
CN107226578A (en) * 2016-03-24 2017-10-03 长江三星能源科技股份有限公司 One kind is used for offshore oilfield polymer-bearing waste-water reinjection treatment method

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WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20080130

C02 Deemed withdrawal of patent application after publication (patent law 2001)