CN102092886B - Combined sewage treatment method for oil field - Google Patents
Combined sewage treatment method for oil field Download PDFInfo
- Publication number
- CN102092886B CN102092886B CN2010106092206A CN201010609220A CN102092886B CN 102092886 B CN102092886 B CN 102092886B CN 2010106092206 A CN2010106092206 A CN 2010106092206A CN 201010609220 A CN201010609220 A CN 201010609220A CN 102092886 B CN102092886 B CN 102092886B
- Authority
- CN
- China
- Prior art keywords
- water
- magnetic
- outlet
- oil
- connects
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 77
- 239000010865 sewage Substances 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 230000008569 process Effects 0.000 claims abstract description 55
- 238000004062 sedimentation Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000003475 lamination Methods 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000006148 magnetic separator Substances 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 17
- 238000002203 pretreatment Methods 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007764 o/w emulsion Substances 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 239000003657 drainage water Substances 0.000 claims description 4
- 238000005188 flotation Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 2
- 239000002569 water oil cream Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 13
- 238000007885 magnetic separation Methods 0.000 abstract description 7
- 239000013043 chemical agent Substances 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000007667 floating Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000004581 coalescence Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 206010020852 Hypertonia Diseases 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001471 micro-filtration Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a combined sewage treatment method for an oil field, which is applied to sewage treatment in a petroleum development gather and delivery process. The method comprises the following steps of: (A) performing a physical separation method: roughly filtering the effluent, regulating the pressure, filtering before metering, and metering the flow to stabilize the pressure; feeding the sewage into a hydraulic cyclone to separate floating oil and dispersible oil; feeding the sewage into a normal pressure buffer tank, and feeding the sewage into the inflating hydraulic cyclone by compression of a screw pump to remove emulsified oil in the sewage; (B) filtering the water flowing out from the inflating hydraulic cyclone into a laminated filter; and (C) feeding the water flowing out from the laminated filter into a magnetic seed mixing tank of a superconducting magnetic separation unit, feeding the nano magnetic seeds into the magnetic seed mixing tank through a magnetic seed feeding tank, pressurizing the water and the magnetic seeds through a mixing pump to enter a pre-sedimentation tank to form lump sediment using the magnetic seeds as cores, feeding the upper clarified liquid and partial water containing the magnetic seed lumps into a superconducting magnetic separation device, and feeding the separated magnetic seeds into the magnetic seed feeding tank. The method has the advantages of no need of chemical agents, short process flow, small floor area and low integral investment and running expenses.
Description
Technical field
The present invention relates to the treatment process for sewage in oil field technology, particularly relate to the process method that a kind of oil field combined-type sewage is handled, be used for the WWT of the defeated process of oil development collection.
Background technology
At present, field use method for treating water cut out the most widely is that traditional " coagulation one sedimentation one is filtered " is the flow process on basis, is aided with scale inhibition, inhibition, sterilization or biochemistry, absorption, membrane sepn processing etc. again.Existing processes flow process comparative maturity, flexibility are strong, reliable and stable, but the occupation area of equipment that this technical process is used is big, energy consumption is high and investment cost is high.
Oil field produced water treatment procedure major control index is oleaginousness, suspended solids content and suspended particle median particle size.
The existence of oil is in recovered water:
1, suspension oil and dispersed oil: content is more than 90%, and the floating oil bead directly is 10～150um;
2, oil in water emulsion: content is 5～8%, and oil bead diameter is 0.01～10um;
3, dissolving oil: 2～5% exist with The dissolved in water.
In the existing oil field produced water technology, the method that oily water separation is mainly adopted is:
1, gravitational separation process: density difference and immiscible property realization oil droplet, suspended substance and the water sepn of utilizing oil and water.Major equipment has transverse flow oil eliminator, waved plate coalescent oil-water separator and the vertical oil tank etc. that removes.This method can not be separated oil in water emulsion or separating effect, separation efficiency is poor.Need in sewage, add flocculation agent and coagulating agent simultaneously.Because gravitational separation process is simple to operate, is the main means of present oily water separation.
2, absorption method: utilize the oil in the oleophilicity material planar water.The oleophilicity material can adsorb very soon, but loses adsorption function after saturated, uses as continuing, and need do desorption and handle.And the desorption complex treatment process, difficult treatment, practical value are not high.
3, coarse method: oil content at wetting coalescence, collision coalescence, hold back, adhere to etc. under the process effect, oil droplet is assembled and is changed from small to big, thereby is removed.If contain the part suspended substance in the sewage, carry out pre-filtering to sewage, increase investment greatly.
The removal of suspended solids in the recovered water:
1, filtration method: utilize effects such as the damming of granule medium, inertial impaction, screening, surface adhesion, coalescence, remove molecule in suspended substance in the sewage, the low outstanding turbidity.Aborning, produce 10% backwashing water, increase quantity of wastewater effluent with respect to treatment capacity.
2, membrane separation process: utilize the selection perviousness have, some particulate or ionic substance are separated and concentrate.It is micro-filtration (MF), ultrafiltration (UF) the most widely that present membrane technique is used in oil field produced water treatment.This method processing accuracy is high, Gu be a kind of liquid--the separation means that develops rapidly.But it is more to have problems, the one, and film antipollution technology is immature, and mostly product is import, and the life-span is short, and price is high; Second power consumption is bigger, has limited the application of this method in disposing polluted water in oil.
Based on oil field produced water treatment present situation, oil-containing, the new technology of suspended substance, new installation in the water appearred removing in succession.For example the spinning oil removal process utilizes hydrocyclone, can remove the oil droplet of particle diameter more than 10～15um.And do not have energy consumption, with respect to traditional process for treating oil field sewage, being tantamount to is a kind of technology preferably.Recently, magnetic separation technique is introduced in the treatment process for sewage in oil field.Be published in the paper " application and the development trend of magnetic separation technique in engineering of water treatment " (author Zhou Mian, Ni Mingliang) of " technology and application " the 8th phase in 2009; Introduce the magnetic separation technique application art, summarized rare-earth magnetic disc, Rake Mai Getemu technology, magnetic bio-carrier.Magnetic separation technique is incorporated in the disposing polluted water in oil.Advantages such as should the technology separation efficiency high, that speed is fast, floor space is little have been embodied.Weak point is that in the magnetic sepn process, adding " magnetic carrier " still need add a certain proportion of flocculation agent (PAC) and SEPIGEL 305 (PAM) chemical agent simultaneously, to increase the sedimentation flocculating effect and the speed of suspended substance in the sewage.Because the unit is many, is difficult to realize sewage disposal device integrated structure and fast-assemblingization.
The problem that traditional treatment Technology for Petroleum Water Flooding flow process exists, the established technology flow process time is long, and occupation area of equipment is big, and investment, capital construction and operation and maintenance cost are high.Add a large amount of chemical agents, the mud of generation causes environmental issue.
Summary of the invention
The objective of the invention is: a kind of oil field combined-type sewage treatment process is provided, adopts inflation hydrocyclone, stacked filtering physical method for separation, filter petroleum substance and coarse grain suspended substance in the sewage; Nanometer " magnetic kind " behind the adding overlay film, fine suspension and organic pollutant are removed in absorption.A modular process, through the superconducting magnetic separation device to remove sludge Bing separation, cleaning magnetic species, so that the treated water standards.
The technical scheme that the present invention adopts is: oil field combined-type sewage treatment process realizes according to the following steps:
A, in eddy flow pre-treatment oil removing unit, adopt a kind of physical separation method, remove mud, oil slick, dispersed oil and oil in water emulsion in the recovered water.Comprise following program:
(a) pending recovered water is fed coarse filter, coarse filter is removed part mud; The pending recovered water that coarse filter is discharged gets into regulator and carries out pressure regulation, makes its pressure-stabilisation, sends into the metering front filter and filters, and the metering front filter filters out part mud, and the water after the metering front filter filters gets into the under meter metering; Pending recovered water is through behind the coarse filter, and pressure carries out pressure regulation during greater than 0.4MPa, like hypertonia, divides secondary to reduce pressure, and makes its pressure-stabilisation within 0.4～0.6MPa scope.
(b) pending recovered water is under 0.4～0.6MPa pressure condition, gets into hydrocyclone, and hydrocyclone makes that contained oil slick, dispersed oil obtain separating and discharging in the sewage.Hydrocyclone underflow water outlet oil-containing control indexes is between 100～150mg/l.The water outlet of hydrocyclone underflow is through the flow metering of underflow under meter, and underflow water outlet after metering gets into the normal pressure surge tank through pressure reducing orifice.
(c) normal pressure surge tank outlet at bottom discharge section mud; The drainage water of normal pressure surge tank is forced into about 0.5MPa through spiral pump, sends into the inflation hydrocyclone, oil in water emulsion in inflation hydrocyclone flotation and cyclonic action are gone down except that sewage.Air provides pressurized air for the inflation hydrocyclone.The inflation hydrocyclone is furnished with air, delivery air chamber and compressed air require meter.
B, the effusive water of inflation hydrocyclone underflow water outlet get into laminated filter after the metering of underflow water ga(u)ge.Remove coarse grain suspended substance in the recovered water with laminated filter.Laminated filter comprises cylindrical shell, water intaking valve, outlet valve, vacuum breaker, mud valve and rowland moral unit.Two groups of series connection of said laminated filter are used, and first group of lamination filtering accuracy of lamination strainer is set to 50 μ m, and second group of lamination filtering accuracy of lamination strainer is set to 20 μ m.Said laminated filter water-in is in the cylindrical shell bottom, and outlet is discharged the mud mouth and then is arranged on cylindrical shell top at the cylindrical shell middle part.
C, second group of filtering water of process lamination strainer get into the magnetic kind tempering tank of superconduction magnetic separating unit; Nanometer magnetic kind adds the magnetic kind and throws in groove; And throw in groove through the magnetic kind and get into magnetic kind tempering tank, filtering water and magnetic kind are mixed, are got into the preliminary sedimentation groove after the supercharging through mixing pump, and it is that the slurry of nuclear is rolled into a ball and precipitated that magnetic kind mixed solution forms in the preliminary sedimentation groove with the magnetic kind; With the magnetic kind is that the slurry group of nuclear is deposited in and gets into magnetic kind withdrawer under the run by gravity effect, and the sludge outlet of magnetic kind withdrawer is discharged mud; Supernatant liquid gets into the superconduction magnetic separating device with the liquid that part contains magnetic kind slurry group in the preliminary sedimentation groove, isolates clear water through the superconduction magnetic separating device and is transported to water tank; Isolate the magnetic kind and mud mixed liquid is carried back the preliminary sedimentation groove through the superconduction magnetic separating device.The superconduction magnetic separating device comprises: superconduction magnetic separator, multi-metal sieve plate, sieve plate transport unit and sieve plate cleanser, reclaim the sepn process of magnetic kind and also comprise magnetic kind cleaning process.
Magnetic kind cleaning process is: superconduction magnetic separator, multi-metal sieve plate and sieve plate cleanser are realized separating and recovery of magnetic kind and mud mixed liquid, through the sieve plate cleanser magnetic kind and mud mixed liquid are transported to the preliminary sedimentation groove; The superconduction magnetic separator is isolated clear water and is transported to water tank.Supernatant liquid and part magnetic kind are the slurry group of nuclear; After the superconduction magnetic separator; The magnetic force of high-intensity magnetic field is adsorbed onto the group of slurry on the multi-metal sieve plate, drives the multi-metal sieve plate through the sieve plate transport unit and changes flow process continuously, under the absorption of magnetic kind; Remove small suspended substance in the water, reach the purpose of continuous purification sewage.Magnetic kind adsorbed contaminants is separated through the sieve plate cleanser, and the magnetic kind is recycled after cleaning.
The equipment that oil field combined-type sewage treatment process adopts comprises: eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit, and eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit are separately fixed on the incorporate sledge seat; Second group of water outlet of the unitary lamination strainer of eddy flow pre-treatment oil removing connects the magnetic kind tempering tank water-in of superconduction magnetic separating unit.
The unitary structure of eddy flow pre-treatment oil removing is: the water outlet of coarse filter connects the inlet of regulator, and the outlet of regulator connects the inlet of metering front filter, and the sludge outlet of metering front filter connects mud delivery pipeline; The water out connection traffic meter of metering front filter; The under meter outlet connects hydrocyclone, and the sump oil outlet of hydrocyclone connects the blowdown oil pipeline, and the water outlet of hydrocyclone connects the underflow under meter; The outlet of underflow under meter connects the pressure reducing orifice inlet; The pressure reducing orifice outlet connects normal pressure surge tank inlet, and normal pressure surge tank bottom sludge outlet connects sludge-discharge pipe line, normal pressure surge tank water out connecting screw rod pump; The spiral pump outlet connects inflation hydrocyclone water inlet; The sump oil outlet connection blowdown oil pipeline of inflation hydrocyclone, the water out of inflation hydrocyclone connects the underflow water ga(u)ge, second group of first group of underflow water ga(u)ge outlet series connection lamination strainer and lamination strainer; The outlet of air connects delivery air chamber, and the delivery air chamber sewage draining exit connects mud delivery pipeline, and the delivery air chamber air outlet connects the compressed air require meter, and the outlet of compressed air require meter connects the compressed air inlet of inflation hydrocyclone.
The structure of superconduction magnetic separating unit is: the magnetic kind is thrown in the magnetic kind inlet of the magnetic kind outlet connection magnetic kind tempering tank of groove; The outlet of magnetic kind tempering tank connects mixing pump; Mix pump outlet and connect preliminary sedimentation groove entry to mixed solution; Preliminary sedimentation groove water out connects superconduction magnetic separating device inlet, and the superconduction magnetic separating device has the mixture export pipeline of water out pipeline and magnetic kind, mud; The sedimentation liquid outlet of preliminary sedimentation groove connects magnetic kind withdrawer, and the recovery magnetic kind outlet of magnetic kind withdrawer connects the recovery mouth that the magnetic kind is thrown in groove, and the mud discharging mouth of magnetic kind withdrawer connects the mud export pipeline; The superconduction magnetic separating device comprises: superconduction magnetic separator, multi-metal sieve plate, sieve plate transport unit and sieve plate cleanser; Inlet line and outlet line in the superconduction magnetic separator are connected with one group of multi-metal sieve plate; In the middle of this group multi-metal sieve plate, be connected with a sieve plate cleanser; The magnetic kind of sieve plate cleanser, the mixture export of mud have pipeline to connect the recovery inlet of preliminary sedimentation groove; The sieve plate transport unit connects the multi-metal sieve plate, and the sieve plate transport unit makes multi-metal sieve plate and superconduction magnetic separator constitute a circulation loop.
Beneficial effect of the present invention: oil field combined-type sewage treatment process; With at present existing disposing polluted water in oil compared with techniques; Effect is: nano thickness thin film is caught organism in the sewage, mineral ion effectively; Replace the organic floculant adding, do not adopted chemical agent, technical process is short, floor space is little, whole investment and working cost are few.
1, oleaginousness reaches water outlet oleaginousness index≤5mg/L by≤1000mg/L after the WWT; Suspended substance (SS) content reaches effluent index≤3mg/L by≤200mg/L; Water outlet solid grain size≤2 μ m.
2, transmission apparatus reduces relatively, and operation energy consumption reduces by 10%; Processing unit reduces, and one-time investment reduces by 15%; Adopt integrated structure, shorten the site operation duration 1/2.
3, high-gradient, the high field intensity that superconduction magnetic separates and the nanometer magnetic method is had, the characteristics that need not add chemical agent, little (the daily handling ability 1000m of unit surface
3, field intensity reaches 3～5T separates and corresponding refrigeration equipment, and floor space is no more than 20m
2).The magnetic sepn process reaction times is 2 seconds, day current consumption about 200kW, (per hour about 8kW/h).
Oil field combined-type sewage treatment process, technology is simple, and plant factor is high, satisfies the processing requirement of disposing polluted water in oil, changes into the sledge mounting means through one, has realized simple, quick.It is few that conversion is connected pipe network, and technological process weak point, manageability, cost is low, efficient is high.
Description of drawings
Fig. 1 is " eddy flow pre-treatment oil removing unit " process flow diagram.
Fig. 2 is " superconduction magnetic separating unit " process flow diagram.
Among the figure: 1. coarse filter; 2. regulator; 3. metering front filter; 4. under meter; 5. hydrocyclone; 6. underflow under meter; 7. pressure reducing orifice; 8. normal pressure surge tank; 9. spiral pump; 10. inflation hydrocyclone; 11. underflow water ga(u)ge; 12. air; 13. delivery air chamber; 14. compressed air require meter; 15-1. first group of lamination strainer; 15-2. second group of lamination strainer; 16. the magnetic kind is thrown in groove; 17. magnetic kind tempering tank; 18. mixing pump; 19. preliminary sedimentation groove; 20. magnetic kind withdrawer; 21. superconduction magnetic separator; 22. multi-metal sieve plate; 23. sieve plate transport unit; 24. sieve plate cleanser.
Embodiment
Embodiment 1: below in conjunction with accompanying drawing, the further detailed step of oilfield sewage combined treatment process of the present invention is described.
Consult Fig. 1." eddy flow pre-treatment oil removing unit " of the present invention be oil removing, remove coarse grain suspended substance separation method:
Pending recovered water at first gets into coarse filter 1, and coarse filter 1 is removed part mud; The pending recovered water that coarse filter 1 is discharged gets into regulator 2 and carries out pressure regulation, carries out pressure regulation when coming the water pressure condition greater than 0.4MPa, like hypertonia, divides secondary to reduce pressure, and makes its pressure-stabilisation in 0.4～0.6MPa scope.Pressure-stabilisation is sent into metering front filter 3 and is filtered, and metering front filter 3 filters out part mud, and the water after metering front filter 3 filters gets under meter 4 meterings;
Sewage gets into hydrocyclone 5 under 0.4～0.6MPa pressure condition, hydrocyclone 5 separates contained oil slick, dispersed oil in the sewage, and underflow water outlet oil-containing control indexes is 110-120mg/l.On the hydrocyclone 5 underflow water outlet pipelines underflow water ga(u)ge 6 is set, underflow water after metering gets into normal pressure surge tank 8 through pressure reducing orifice 7.
Normal pressure surge tank 8 outlet at bottom discharge section mud; 8 drainage waters of normal pressure surge tank are forced into about 0.5MPa through spiral pump 9, send into inflation hydrocyclone 10, oil in water emulsion in inflation hydrocyclone 10 flotation and cyclonic action are gone down except that sewage.Air 12 provides pressurized air for inflation hydrocyclone 10.Inflation hydrocyclone 10 is furnished with air 12, delivery air chamber 13 and compressed air require meter 14.
The effusive water of inflation hydrocyclone 10 underflow water outlets gets into laminated filter after 11 meterings of underflow water ga(u)ge.Remove coarse grain suspended substance in the recovered water with laminated filter.During the work of inflation hydrocyclone, supply with pressurized air by the air 12 of configuration with delivery air chamber 13 and guarantee operation, compressed air line is provided with compressed air require meter 14.
The sump oil that hydrocyclone is discharged by the pipeline and the valve of necessity, is delivered to the sump oil system and deals with in addition.Inflation hydrocyclone underflow water outlet after metering is connected with laminated filter through pipeline, and this process is removed coarse grain suspended substance in the recovered water.Comprise cylindrical shell, water intaking valve, outlet valve, vacuum breaker, mud valve and rowland moral unit.The series connection of two groups of said strainers is used, second group of 15-2 of first group of 15-1 of lamination strainer and lamination strainer use of connecting.The setting of lamination filtering accuracy is respectively 50 μ m, 20 μ m.Said strainer water-in is in the cylindrical shell bottom, and outlet is discharged the mud mouth and then is arranged on cylindrical shell top at the cylindrical shell middle part.
Consult Fig. 2.The primary process that " superconduction magnetic separating unit " handled is:
Get into the magnetic kind tempering tank 17 of superconduction magnetic separating unit through the filtering water of second group of 15-2 of lamination strainer; Nanometer magnetic kind adds the magnetic kind and throws in groove 16; And through magnetic kind input groove 16 entering magnetic kind tempering tanks 17; Filtering water and magnetic kind are mixed, are got into preliminary sedimentation groove 19 after the supercharging through mixing pump 18; It is the slurry group deposition of nuclear that magnetic kind mixed solution forms in preliminary sedimentation groove 19 with the magnetic kind, is that the slurry group of nuclear is deposited in the entering magnetic kind withdrawer 20 run by gravity effect under, the sludge outlet discharge mud of magnetic kind withdrawer 20 with the magnetic kind; Supernatant liquid gets into the superconduction magnetic separating device with the liquid that part contains magnetic kind slurry group in preliminary sedimentation groove 19, isolates clear water through the superconduction magnetic separating device and is transported to water tank; Isolate the magnetic kind and mud mixed liquid is carried back preliminary sedimentation groove 19 through the superconduction magnetic separating device.The superconduction magnetic separating device comprises: superconduction magnetic separator 21, multi-metal sieve plate 22, sieve plate transport unit 23 and sieve plate cleanser 24.Reclaim the sepn process of magnetic kind and also comprise magnetic kind cleaning process.
Magnetic kind cleaning process is: superconduction magnetic separator 21, multi-metal sieve plate 22 and sieve plate cleanser 24 are realized separating and recovery of magnetic kind and mud mixed liquid, through sieve plate cleanser 24 magnetic kind and mud mixed liquid are transported to preliminary sedimentation groove 19; Superconduction magnetic separator 21 is isolated clear water and is transported to water tank.Supernatant liquid and part magnetic kind are the slurry group of nuclear; After superconduction magnetic separator 21; The magnetic force of high-intensity magnetic field is adsorbed onto the group of slurry on the multi-metal sieve plate 22, drives multi-metal sieve plate 22 through sieve plate transport unit 23 and changes flow process continuously, under the absorption of magnetic kind; Remove small suspended substance in the water, reach the purpose of continuous purification sewage.Magnetic kind adsorbed contaminants is separated through sieve plate cleanser 24, and the magnetic kind is recycled after cleaning, and it is pending in addition that mud is delivered to system.
The equipment that oil field combined-type sewage treatment process adopts comprises: eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit, eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit are separately fixed on the incorporate sledge seat.Second group of 15-2 water outlet of the unitary lamination strainer of eddy flow pre-treatment oil removing connects magnetic kind tempering tank 17 water-ins of superconduction magnetic separating unit.
In component devices: what coarse filter 1 adopted is conventional y-type filter; Under meter 4, underflow under meter 6, underflow water ga(u)ge 11 all adopt electromagnetic type flow meter.What hydrocyclone 5 adopted is bicone.The self-contained pressure regulator that regulator 2 adopts; What pressure reducing orifice 7 adopted is conventional current limliting control plate.
Consult Fig. 1.The unitary structure of eddy flow pre-treatment oil removing is: the water outlet of coarse filter 1 connects the inlet of regulator 2, and the outlet of regulator 2 connects the inlet of metering front filter 3, and the sludge outlet of metering front filter 3 connects mud delivery pipeline; The water out connection traffic meter 4 of metering front filter 3; Under meter 4 outlets connect hydrocyclone 5, and the sump oil outlet of hydrocyclone 5 connects the blowdown oil pipeline, and the water outlet of hydrocyclone 5 connects underflow under meter 6; The outlet of underflow under meter 6 connects pressure reducing orifice 7 inlets; Pressure reducing orifice 7 outlets connect normal pressure surge tank 8 inlets, and normal pressure surge tank 8 bottom sludge outlets connect sludge-discharge pipe line, normal pressure surge tank 8 water out connecting screw rod pumps 9; Spiral pump 9 outlets connect inflation hydrocyclone 10 water inlets; The sump oil outlet of inflation hydrocyclone 10 connects the blowdown oil pipeline, and the water out of inflation hydrocyclone 10 connects underflow water ga(u)ge 11, underflow water ga(u)ge 11 outlet series connection first group of 15-1 of lamination strainer and second group of 15-2 of lamination strainer; The outlet of air 12 connects delivery air chamber 13; Delivery air chamber 13 sewage draining exits connect mud delivery pipeline; Delivery air chamber 13 air outlets connect compressed air require meter 14, and 14 outlets of compressed air require meter connect the compressed air inlet of inflation hydrocyclone 10.
Consult Fig. 2.The structure of superconduction magnetic separating unit is: the magnetic kind is thrown in the magnetic kind inlet of the magnetic kind outlet connection magnetic kind tempering tank 17 of groove 16; The outlet of magnetic kind tempering tank 17 connects mixing pump 18; The outlet of mixing pump 18 connects preliminary sedimentation groove 19 entry to mixed solution; Preliminary sedimentation groove 19 water outs connect superconduction magnetic separating device inlet, and the superconduction magnetic separating device has the mixture export pipeline of water out pipeline and magnetic kind, mud; The sedimentation liquid outlet of preliminary sedimentation groove 19 connects magnetic kind withdrawer 20, and the recovery magnetic kind outlet of magnetic kind withdrawer 20 connects the recovery mouth that the magnetic kind is thrown in groove 16, and the mud discharging mouth of magnetic kind withdrawer 20 connects the mud export pipeline; The superconduction magnetic separating device comprises: superconduction magnetic separator 21, multi-metal sieve plate 22, sieve plate transport unit 23 and sieve plate cleanser 24; Inlet line and outlet line in superconduction magnetic separator 21 are connected with one group of multi-metal sieve plate 22; In the middle of this group multi-metal sieve plate 22, be connected with a sieve plate cleanser 24; The magnetic kind of sieve plate cleanser 24, the mixture export of mud have pipeline to connect the recovery inlet of preliminary sedimentation groove 19; Sieve plate transport unit 23 connects multi-metal sieve plate 22, and sieve plate transport unit 23 makes multi-metal sieve plate 22 and superconduction magnetic separator 21 constitute a circulation loop.
Claims (9)
1. oil field combined-type sewage treatment process is characterized in that: realize according to the following steps:
(A) in eddy flow pre-treatment oil removing unit; Utilize physical partition method to remove mud, oil slick, dispersed oil and oil in water emulsion in the recovered water; Physical partition method comprises following program: pending recovered water is fed coarse filter (1), and the pending recovered water that coarse filter (1) discharge section mud, coarse filter (1) are discharged gets into regulator (2) and carries out pressure regulation; Make its pressure-stabilisation; Send into metering front filter (3) and filter, metering front filter (3) filters out part mud, and the water after metering front filter (3) filters gets under meter (4) metering;
Pending recovered water gets into hydrocyclone (5) under steady pressure, hydrocyclone (5) makes that contained oil slick, dispersed oil obtain separating and discharging in the sewage; Hydrocyclone (5) underflow water outlet is through underflow under meter (6) flow metering, and the underflow water outlet gets into normal pressure surge tank (8) through pressure reducing orifice (7);
Normal pressure surge tank (8) outlet at bottom discharge section mud; Normal pressure surge tank (8) drainage water is sent into inflation hydrocyclone (10) through spiral pump (9) pressurization, oil in water emulsion in inflation hydrocyclone (10) flotation is gone down except that sewage with cyclonic action, and air (12) provides pressurized air for inflating hydrocyclone (10);
(B) the effusive water of inflation hydrocyclone (10) underflow water outlet is after underflow water ga(u)ge (11) metering; Get into laminated filter, promptly pass through first group (15-1) of lamination strainer and placed in-line lamination strainer second group (15-2) and remove coarse grain suspended substance in the recovered water;
(C) second group of (15-2) filtering water of process lamination strainer gets into the magnetic kind tempering tank (17) of superconduction magnetic separating unit; Nanometer magnetic kind adds the magnetic kind and throws in groove (16); And through magnetic kind input groove (16) entering magnetic kind tempering tank (17); Filtering water and magnetic kind are mixed, are got into preliminary sedimentation groove (19) after mixing pump (18) supercharging through magnetic kind tempering tank (17); It is the slurry group deposition of nuclear that magnetic kind mixed solution forms in preliminary sedimentation groove (19) with the magnetic kind, is that the slurry group of nuclear is deposited in entering magnetic kind withdrawer (20) the run by gravity effect under, the sludge outlet discharge mud of magnetic kind withdrawer (20) with the magnetic kind; Supernatant liquid gets into the superconduction magnetic separating device with the liquid that part contains magnetic kind slurry group in preliminary sedimentation groove (19), isolates clear water through the superconduction magnetic separating device and is transported to water tank; Isolate the magnetic kind and mud mixed liquid is carried back preliminary sedimentation groove (19) through the superconduction magnetic separating device; The superconduction magnetic separating device comprises: superconduction magnetic separator (21), multi-metal sieve plate (22), sieve plate transport unit (23) and sieve plate cleanser (24), reclaim the sepn process of magnetic kind and also comprise magnetic kind cleaning process; Described magnetic kind cleaning process is: superconduction magnetic separator (21), multi-metal sieve plate (22) and sieve plate cleanser (24) are realized separating and recovery of magnetic kind and mud mixed liquid, through sieve plate cleanser (24) magnetic kind and mud mixed liquid are transported to preliminary sedimentation groove (19); Superconduction magnetic separator (21) is isolated clear water and is transported to water tank.
2. oil field as claimed in claim 1 combined-type sewage treatment process is characterized in that: in the step (A), through behind the coarse filter (1), pressure need carry out pressure regulation during greater than 0.4MPa, makes its pressure-stabilisation in 0.4～0.6MPa scope with pending recovered water.
3. oil field as claimed in claim 1 combined-type sewage treatment process is characterized in that: in the step (A), the underflow water outlet oil-containing control indexes of hydrocyclone (5) is between 100～150mg/l.
4. oil field as claimed in claim 1 combined-type sewage treatment process is characterized in that: in the step (A), normal pressure surge tank (8) drainage water is forced into 0.5MPa through spiral pump (9).
5. oil field as claimed in claim 1 combined-type sewage treatment process; It is characterized in that: in the step (A); Spiral pump (9) outlet conduit is sent sewage into inflation hydrocyclone (10), on inflation hydrocyclone (10) the water outlet pipeline underflow water ga(u)ge is set, during inflation hydrocyclone (10) work; Supply with pressurized air by air (12) and delivery air chamber (13) and guarantee operation, air-supply duct is provided with compressed air require meter (14).
6. oil field as claimed in claim 1 combined-type sewage treatment process is characterized in that: in the step (B), first group of (15-1) lamination of lamination strainer filtering accuracy is set to 50 μ m, and second group of (15-2) lamination of lamination strainer filtering accuracy is set to 20 μ m; Sewage is by the water inlet of laminated filter cylindrical shell lower inlet, and filter back liquid effluent is discharged by laminated filter cylindrical shell middle part, is adsorbed on coarse grain suspended substance and oil, mud on the lamination, is discharged by laminated filter cylindrical shell top.
7. like claim 1,2,3,4,5 or 6 described oil field combined-type sewage treatment processs; It is characterized in that; The tooling that adopts comprises eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit, and eddy flow pre-treatment oil removing unit and superconduction magnetic separating unit are separately fixed on the incorporate sledge seat; Second group of (15-2) water outlet of the unitary lamination strainer of eddy flow pre-treatment oil removing connects magnetic kind tempering tank (17) water-in of superconduction magnetic separating unit.
8. oil field as claimed in claim 7 combined-type sewage treatment process; It is characterized in that: the unitary structure of eddy flow pre-treatment oil removing is: the water outlet of coarse filter (1) connects the inlet of regulator (2); The outlet of regulator (2) connects the inlet of metering front filter (3); The sludge outlet of metering front filter (3) connects mud delivery pipeline, the water out connection traffic meter (4) of metering front filter (3), and under meter (4) outlet connects hydrocyclone (5); The sump oil outlet of hydrocyclone (5) connects the blowdown oil pipeline; The water outlet of hydrocyclone (5) connects underflow under meter (6), and the outlet of underflow under meter (6) connects pressure reducing orifice (7) inlet, and pressure reducing orifice (7) outlet connects normal pressure surge tank (8) inlet; Normal pressure surge tank (8) bottom sludge outlet connects the sludge-discharge pipe line; Normal pressure surge tank (8) water out connecting screw rod pump (9), spiral pump (9) outlet connect inflation hydrocyclone (10) water inlet, and the sump oil outlet of inflation hydrocyclone (10) connects the blowdown oil pipeline; The water out of inflation hydrocyclone (10) connects underflow water ga(u)ge (11), underflow water ga(u)ge (11) outlet series connection lamination strainer first group of (15-1) and second group of lamination strainer (15-2); The outlet of air (12) connects delivery air chamber (13); Delivery air chamber (13) sewage draining exit connects mud delivery pipeline; Delivery air chamber (13) air outlet connects compressed air require meter (14), and compressed air require meter (14) outlet connects the compressed air inlet of inflation hydrocyclone (10).
9. oil field as claimed in claim 7 combined-type sewage treatment process; It is characterized in that: the structure of superconduction magnetic separating unit is: the magnetic kind is thrown in the magnetic kind inlet of the magnetic kind outlet connection magnetic kind tempering tank (17) of groove (16); The outlet of magnetic kind tempering tank (17) connects mixing pump (18); The outlet of mixing pump (18) connects preliminary sedimentation groove (19) entry to mixed solution; Preliminary sedimentation groove (19) water out connects superconduction magnetic separating device inlet, and the superconduction magnetic separating device has the mixture export pipeline of water out pipeline and magnetic kind, mud; The sedimentation liquid outlet of preliminary sedimentation groove (19) connects magnetic kind withdrawer (20), and the recovery magnetic kind outlet of magnetic kind withdrawer (20) connects the recovery mouth that the magnetic kind is thrown in groove (16), and the mud discharging mouth of magnetic kind withdrawer (20) connects the mud export pipeline; The superconduction magnetic separating device comprises: superconduction magnetic separator (21), multi-metal sieve plate (22), sieve plate transport unit (23) and sieve plate cleanser (24); Inlet line and outlet line in superconduction magnetic separator (21) are connected with one group of multi-metal sieve plate (22); In the middle of this group multi-metal sieve plate (22), be connected with a sieve plate cleanser (24); The magnetic kind of sieve plate cleanser (24), the mixture export of mud have pipeline to connect the recovery inlet of preliminary sedimentation groove (19); Sieve plate transport unit (23) connects multi-metal sieve plate (22), and sieve plate transport unit (23) makes multi-metal sieve plate (22) and superconduction magnetic separator (21) constitute a circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106092206A CN102092886B (en) | 2010-12-17 | 2010-12-17 | Combined sewage treatment method for oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106092206A CN102092886B (en) | 2010-12-17 | 2010-12-17 | Combined sewage treatment method for oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092886A CN102092886A (en) | 2011-06-15 |
| CN102092886B true CN102092886B (en) | 2012-07-18 |
Family
ID=44126177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106092206A Active CN102092886B (en) | 2010-12-17 | 2010-12-17 | Combined sewage treatment method for oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102092886B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103058443A (en) * | 2011-10-18 | 2013-04-24 | 成都快典科技有限公司 | Industrial wastewater treatment device |
| CN103641216B (en) * | 2013-12-10 | 2015-11-25 | 北京科技大学 | The method of superconduction HGMS-NZVI coupling technique process heavy metal wastewater thereby |
| CN104860385B (en) * | 2015-05-14 | 2017-07-04 | 西安长庆科技工程有限责任公司 | A kind of low permeability oil field produced water treatment technique and system |
| CN105330083A (en) * | 2015-10-26 | 2016-02-17 | 张萍 | Petroleum and petrochemical wastewater recycling and treating device |
| CN105776722A (en) * | 2016-03-15 | 2016-07-20 | 孙硕 | Sewage treatment system |
| CN116177767A (en) * | 2021-11-26 | 2023-05-30 | 中国石油化工股份有限公司 | Oilfield produced fluid pre-water separation equipment and method and filter manufacturing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2344068Y (en) * | 1998-11-16 | 1999-10-20 | 虞荣松 | High-efficiency hydraulic cyclone separation device |
| CN101054244A (en) * | 2007-03-14 | 2007-10-17 | 安东石油技术（集团）有限公司 | Process for treating sewage of oil field |
| CN201406337Y (en) * | 2008-12-22 | 2010-02-17 | 西安恒旭科技发展有限公司 | Magnetic type micro-flocculation oilfield sewage pretreatment device |
| JP2010194461A (en) * | 2009-02-25 | 2010-09-09 | Sumitomo Electric Ind Ltd | Oil-water separator |
-
2010
- 2010-12-17 CN CN2010106092206A patent/CN102092886B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2344068Y (en) * | 1998-11-16 | 1999-10-20 | 虞荣松 | High-efficiency hydraulic cyclone separation device |
| CN101054244A (en) * | 2007-03-14 | 2007-10-17 | 安东石油技术（集团）有限公司 | Process for treating sewage of oil field |
| CN201406337Y (en) * | 2008-12-22 | 2010-02-17 | 西安恒旭科技发展有限公司 | Magnetic type micro-flocculation oilfield sewage pretreatment device |
| JP2010194461A (en) * | 2009-02-25 | 2010-09-09 | Sumitomo Electric Ind Ltd | Oil-water separator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102092886A (en) | 2011-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8828224B2 (en) | Device for purifying oily wastewater | |
| CN201046371Y (en) | Oil-contaminated water purifying three-phase cyclone separator | |
| CN101279778A (en) | Three-phase cyclone separator cleaning treatment system for oil-contaminated water | |
| CN102092886B (en) | Combined sewage treatment method for oil field | |
| CN107540105B (en) | Oil removing method and device for cold rolling concentrated oil emulsion wastewater | |
| CN112390420A (en) | System and method suitable for treating complex produced liquid of offshore gas field | |
| RU2014142012A (en) | METHOD FOR PROCESSING WASTE FLOW USING A BIOREACTOR AND A MEMBRANE FILTER | |
| CA3005192A1 (en) | Standardized oilfield water treatment device and process using physical method | |
| CN102464413A (en) | Ship oily wastewater treatment process | |
| CN103755052B (en) | A kind for the treatment of process of oil refining Wastewater by Electric desalination black liquor and system | |
| CN103787527B (en) | A kind of oil-contaminated water air-float suspended layer filtration unit | |
| CN102887596A (en) | Method and device for treating oil-containing emulsified wastewater or waste emulsion | |
| CN101219836A (en) | System and technique for processing oily wastewater with high saline salinity | |
| CN104445677B (en) | A kind of underground movable modularization mine water treatment system | |
| CN102939268A (en) | Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor | |
| CN109534581B (en) | Zero-discharge treatment process for cutting fluid wastewater | |
| CN204281479U (en) | A kind for the treatment of system of coating wastewater | |
| RU2747649C2 (en) | Combination system and method for preparing reservoir water and sea water for repeated injection into underwater oil reservoir | |
| CN109019985A (en) | A kind of processing method of oil-containing heavy metal wastewater thereby industry | |
| CN102040289A (en) | Method and equipment for regenerating and recycling textile dyeing wastewater | |
| CN110510798A (en) | A method of with microbubble advanced treating ternary composite flooding water extraction | |
| CN112811667B (en) | Sequential oil removing system and method | |
| CN114763283B (en) | A mine water underground treatment system and treatment method | |
| CN109293051B (en) | Treatment system and method for high-suspended matter oily sewage | |
| CN209618941U (en) | A kind of depth degreasing unit of aromatic device production waste |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |