CN201099648Y - Low infiltration oil extraction sewage processor for oilfield reinjection - Google Patents

Low infiltration oil extraction sewage processor for oilfield reinjection Download PDF

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Publication number
CN201099648Y
CN201099648Y CNU2007200259187U CN200720025918U CN201099648Y CN 201099648 Y CN201099648 Y CN 201099648Y CN U2007200259187 U CNU2007200259187 U CN U2007200259187U CN 200720025918 U CN200720025918 U CN 200720025918U CN 201099648 Y CN201099648 Y CN 201099648Y
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China
Prior art keywords
pump
biological contact
biological
contact oxidation
tank
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Expired - Fee Related
Application number
CNU2007200259187U
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Chinese (zh)
Inventor
郭省学
王海峰
杜春安
郭辽原
蒋焱
耿雪丽
袁长忠
张君
骆克峻
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Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
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Oil Production Technology Research Institute of Sinopec Shengli Oilfield Co
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Priority to CNU2007200259187U priority Critical patent/CN201099648Y/en
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Publication of CN201099648Y publication Critical patent/CN201099648Y/en
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    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Separation Using Semi-Permeable Membranes (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

A low osmosis oil development sewage treatment device for oilfield injection comprises a sewage pump, an air floatation tank, a release device, a slag scraper, a dissolved gas tank, an air compressor, an aeration tube, a biological contact oxidization tank, stuff, an overflow weir, a biological oxygen removal reactor, an ultrafilter water pump, an ultrafilter device, a multistage pressure centrifugal pump, a nanofiltration device and a trailer, wherein the trailer is sequentially mounted with the sewage pump, air floatation tank, dissolved gas tank, biological contact oxidization tank, air compressor, biological oxygen removal reactor, ultrafilter water pump, ultrafilter water pump, multistage pressure centrifugal pump and the nanofiltration device, the air flotation tank and the sewage pump, the dissolved gas tank and biological contact oxidization tank are connected via pipelines, the biological contact oxidization tank is mounted with stuff and aeration tube, the biological oxygen removal reactor is connected with the biological contact oxidization tank and the ultrafiltration water pump which is connected with the ultrafiltration water pump and multistage pressure centrifugal pump, and one side of the nanofiltration device is connected with the multistage pressure centrifugal pump while another side is provided with a pure water outlet.

Description

Low permeability oil field re-injection oil extraction-generated waste water treatment unit
One, technical field
The utility model relates to the biological treatment of sewage, particularly a kind of low permeability oil field re-injection oil extraction-generated waste water treatment unit.
Two, background technology
When the oil field enters high water-cut stage, the row of oil extraction-generated waste water, put or handle re-injection and become important topic.Hyposmosis, extra permeability oilfield are to the strictness of re-injection water quality requirement, and re-injection water quality is not up to standard, causes reservoir choke and equipment and problems such as pipeline scaling, corrosion easily, thereby influences development effectiveness.Oil in the oil extraction-generated waste water and suspended substance are to cause the two big important factors stopped up, and the existence of high salinity, sulphate reducing bacteria and iron bacteria etc. has been quickened corrosion and carried out Ca 2+, Mg 2+, SO 4 2-Cause fouling Deng incrustation ion.Oil extraction-generated waste water oil removing at present, remove suspended substance and mainly adopt gravity oil-removing method (based on coagulant precipitation, quartz sand filtration), pressure oil removal process (based on oil and water separation bygranulation and inclined tube sedimentation), oil removal by air bubbling etc.; yet need to use the organic or inorganic coagulating agent in these oil removal processes; add the water quality situation that makes behind these chemical agents after the processing and become more complicated; and produce a large amount of body refuses, also relatively poor to the oil in water emulsion removal effect.Processing accuracy will reach low permeability oil field re-injection water quality requirement also need pass through fine filtering, at present, smart when filtering journey and having back flushing filtrate runs off, easily harden, handle afterwards suspension content and grain diameter is not up to standard, filtrate is subject to problems such as crude oil pollution.Adding of germicide, oxygen scavenger, inhibiter and Scale inhibitors etc. are generally wanted in the fouling of prevention burn into, and this not only will consider the compatibleness problem between medicament, strengthened intractability and influenced treatment effect, and the use of chemical agent causes second environmental pollution.Oil field extracted water still is difficult to satisfy especially extra permeability oilfield re-injection water requirement of hyposmosis after above-mentioned art breading.
Three, summary of the invention
The purpose of this utility model is both to have overcome shortcoming or the deficiency that exists in the above-mentioned prior art, have no equipment corrosion, no fouling, environmental protection again, re-injection water water quality reaches national A1 grade standard after treatment, can satisfy the low permeability oil field re-injection oil extraction-generated waste water treatment unit that low permeability oil field even ultralow oil impregnate water in field matter require fully.
Low permeability oil field re-injection oil extraction-generated waste water treatment unit described in the utility model, comprise sump pump, air flotation pool and reliever and slag scraper, dissolving, air compressor and aeration tube, biological contact oxidation pond and filler and overflow weir, the biological oxygen reactor that removes, the ultrafiltration water pump, ultra-filtration equipment, multistage pressurizing cenrrifugal pump, nanofiltration device and trailer, sump pump is installed on the described trailer in turn, air flotation pool, dissolving, biological contact oxidation pond, air compressor, the biological oxygen reactor that removes, the ultrafiltration water pump, ultra-filtration equipment, multistage pressurizing cenrrifugal pump, nanofiltration device, described air flotation pool and sump pump, dissolving is connected by pipeline with biological contact oxidation pond, be installed on filler and aeration tube in the described biological contact oxidation pond, described biology removes oxygen reactor and is connected with the ultrafiltration water pump with biological contact oxidation pond respectively, described ultra-filtration equipment links to each other with multistage pressurizing cenrrifugal pump with the ultrafiltration water pump respectively, described nanofiltration device, link to each other with multistage pressurizing cenrrifugal pump on one side, the other side is a treated water outlet.
Wherein, described biological contact oxidation pond top is provided with overflow weir, and this overflow weir is connected with the biological oxygen reactor that removes by pipeline.Described biological contact oxidation pond is the two-stage series connection structure.Described trailer also can be the skid structure.
The utility model has following advantage compared with prior art:
1, adopts pre-biochemical, the biological contact oxidation process oil removing of air supporting, part oil, the suspended substance in the oily(waste)water not only removed in air supporting, and improved Biodegradability of Wastewater, the bio-contact oxidation process can be removed micro oil, the oil in water emulsion in the sewage, contact-oxidation pool water outlet oil-containing≤1mg/L has alleviated the pollution to membrane module in the subsequent processes.
2, effectively kill sulphate reducing bacteria, solved the bacterial corrosion problem.In bio-contact oxidation and biological oxygen removal process, growth and the metabolism of hydrocarbon oxidation bacterium and other aerobic heterotrophic bacterium, consumed in the water body sulphate reducing bacteria necessary nutrition substrate of surviving, the metabolism of sulphate reducing bacteria can't have been carried out, thereby cause death.In the biological oxygen removal process, the suspended substance of bio-chemical effluent obtains effective sedimentation simultaneously.
3, ultrafiltration is as the pre-treatment of nanofiltration, the work-ing life and the processing efficiency of nanofiltration membrane have been improved, and ultra-filtration equipment further removes suspended substance, the particle of the medium and small molecule that anhydrates, the oil and the bacterium of denier, solves hypotonic, special low-permeability oilfield re-injection water slug STRATIGRAPHIC PROBLEMS.
4, the membrane module in the nanofiltration device is to SO 4 2-, Ca 2+, Mg 2+Deng divalent ion very high rejection is arranged, and low to the monovalent ion clearance.When effectively removing scale-forming ion, kept certain salinity, this had both efficiently solved re-injection water scale problems, had avoided the reservoir damage of water sensitivity oil reservoir again.
5, simplify the treatment process for sewage in oil field flow process, do not added any chemical agent in the entire sewage treating processes, reduced cost of sewage disposal, and avoided the secondary pollution of chemical agent.
6, the utility model treatment unit adopts modular design, can be assembled into vehicle-mounted or the portable treatment unit of skid, and is mobile, easy to loading and unloading, can be applicable to the water filling website, prevents to handle polluting along journey of back sewage transport process.
Oil extraction-generated waste water sulphate reducing bacteria after the processing, iron bacteria and saprophytic microorganism content are 0, and suspended substance and grain diameter can not detect, and oil-containing is less than 0.5mg/L, and average corrosion rate is less than 0.05mm/a, Ca 2+, Mg 2+Content is less than 5mg/L, SO 4 2-Content can satisfy the injection water quality requirement of hypotonic, ultralow oil impregnate field less than 10mg/L.
Four, description of drawings
Accompanying drawing is the utility model structural representation.
Five, embodiment
Consult accompanying drawing, a kind of low permeability oil field re-injection oil extraction-generated waste water treatment unit, comprise sump pump, air flotation pool and reliever and slag scraper, dissolving, air compressor and aeration tube, biological contact oxidation pond and filler and overflow weir, the biological oxygen reactor that removes, the ultrafiltration water pump, ultra-filtration equipment, multistage pressurizing cenrrifugal pump, nanofiltration device and trailer, sump pump 1 is installed on the trailer 16 in turn, air flotation pool 2, dissolving 5, biological contact oxidation pond 8, air compressor 6, the biological oxygen reactor 11 that removes, ultrafiltration water pump 12, ultra-filtration equipment 13, multistage pressurizing cenrrifugal pump 14, nanofiltration device 15, air flotation pool 2 and sump pump 1, dissolving 5 and biological contact oxidation pond 8 are connected by pipeline, be installed on filler 7 and aeration tube 9 in the biological contact oxidation pond 8, the biological oxygen reactor 11 that removes is connected with ultrafiltration water pump 12 with biological contact oxidation pond 8 respectively, ultra-filtration equipment 13 links to each other with multistage pressurizing cenrrifugal pump 14 with ultrafiltration water pump 12 respectively, nanofiltration device 15, link to each other with multistage pressurizing cenrrifugal pump 14 on one side, the other side is a treated water outlet.
Biological contact oxidation pond 8 tops are provided with overflow weir 10, and this overflow weir is connected with the biological oxygen reactor 11 that removes by pipeline.Biological contact oxidation pond 8 is the two-stage series connection structure.The biological oxygen reactor inner bottom part that removes is equipped with flow deflector 17.Reliever 3 is installed in the air flotation pool 2, slag scraper 4 is installed on the top.Trailer 16 is one or split-type structural, also can be the sledge-borne type structure.

Claims (4)

1, a kind of low permeability oil field re-injection oil extraction-generated waste water treatment unit, comprise sump pump, air flotation pool and reliever and slag scraper, dissolving, air compressor and aeration tube, biological contact oxidation pond and filler and overflow weir, the biological oxygen reactor that removes, the ultrafiltration water pump, ultra-filtration equipment, multistage pressurizing cenrrifugal pump, nanofiltration device and trailer, it is characterized in that being equipped with in turn on the described trailer sump pump, air flotation pool, dissolving, biological contact oxidation pond, air compressor, the biological oxygen reactor that removes, the ultrafiltration water pump, ultra-filtration equipment, multistage pressurizing cenrrifugal pump, nanofiltration device, described air flotation pool and sump pump, dissolving is connected by pipeline with biological contact oxidation pond, be installed on filler and aeration tube in the described biological contact oxidation pond, described biology removes oxygen reactor and is connected with the ultrafiltration water pump with biological contact oxidation pond respectively, described ultra-filtration equipment links to each other with multistage pressurizing cenrrifugal pump with the ultrafiltration water pump respectively, described nanofiltration device, link to each other with multistage pressurizing cenrrifugal pump on one side, the other side is a treated water outlet.
2, low permeability oil field re-injection oil extraction-generated waste water treatment unit according to claim 1 is characterized in that described biological contact oxidation pond top is provided with overflow weir, and this overflow weir is connected with the biological oxygen reactor that removes by pipeline.
3, low permeability oil field re-injection oil extraction-generated waste water treatment unit according to claim 1 is characterized in that described biological contact oxidation pond is the two-stage series connection structure.
4, low permeability oil field re-injection oil extraction-generated waste water treatment unit according to claim 1 is characterized in that described trailer also can be the skid structure.
CNU2007200259187U 2007-08-01 2007-08-01 Low infiltration oil extraction sewage processor for oilfield reinjection Expired - Fee Related CN201099648Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101671091B (en) * 2009-09-29 2013-03-13 哈尔滨工业大学 Processing method for produced water for ultra-low permeable oil field reinjection
WO2013028747A3 (en) * 2011-08-22 2013-05-10 Ecologix Environmental Systems Llc System and method for mobile water treatment
CN110563273A (en) * 2019-09-20 2019-12-13 中国石油化工股份有限公司 Method for controlling deterioration of oilfield reinjection water along course

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101671091B (en) * 2009-09-29 2013-03-13 哈尔滨工业大学 Processing method for produced water for ultra-low permeable oil field reinjection
WO2013028747A3 (en) * 2011-08-22 2013-05-10 Ecologix Environmental Systems Llc System and method for mobile water treatment
CN110563273A (en) * 2019-09-20 2019-12-13 中国石油化工股份有限公司 Method for controlling deterioration of oilfield reinjection water along course

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C17 Cessation of patent right
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Granted publication date: 20080813