CN107522310A - Not agent-feeding treatment oil-polluted water re-injection technique - Google Patents

Not agent-feeding treatment oil-polluted water re-injection technique Download PDF

Info

Publication number
CN107522310A
CN107522310A CN201710962785.4A CN201710962785A CN107522310A CN 107522310 A CN107522310 A CN 107522310A CN 201710962785 A CN201710962785 A CN 201710962785A CN 107522310 A CN107522310 A CN 107522310A
Authority
CN
China
Prior art keywords
oil
polluted water
water
flotation
agent
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.)
Withdrawn
Application number
CN201710962785.4A
Other languages
Chinese (zh)
Inventor
周光辉
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.)
ENMAN TECHNOLOGY (BEIJING) Co Ltd
Original Assignee
ENMAN TECHNOLOGY (BEIJING) Co Ltd
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
Publication date
Application filed by ENMAN TECHNOLOGY (BEIJING) Co Ltd filed Critical ENMAN TECHNOLOGY (BEIJING) Co Ltd
Priority to CN201710962785.4A priority Critical patent/CN107522310A/en
Publication of CN107522310A publication Critical patent/CN107522310A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/40Devices for separating or removing fatty or oily substances or similar floating material
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/04Disinfection
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/22Eliminating or preventing deposits, scale removal, scale prevention

Abstract

The present invention relates to a kind of not agent-feeding treatment oil-polluted water re-injection technique, mainly include the following steps that:Oil-polluted water handles to obtain and treats reinjected water by aeration demulsification, cyclone air-flotation, collision coalescence, micro- flotation and adsorption filtration successively after settlement treatment;Automatic collecting oil device oil removing is added in settlement treatment technique, the mud mixture of each process section separation, which is collected to sludge-tank, sedimentation layering, obtains sludge blanket and supernatant liquor, and sludge blanket is discharged after concentration.This technique by the way of physical separation, the water of separation can direct re-injection, deoiling effect is good, the advantages of reducing oil slick body refuse.

Description

Not agent-feeding treatment oil-polluted water re-injection technique
Technical field
The present invention relates to oily waste water treatment field, and in particular, it is related to a kind of not agent-feeding treatment oil-polluted water and returned Note technique.
Background technology
In oil recovery in initial oilfield exploitation, the Produced Liquid produced from oil well includes the mixture of crude oil, stratum water and the mud produced. In petroleum refining process, if water and crude oil heat together, water rapidly vaporized expanding, pressure can increase, and be likely to result in blast It is dangerous.Therefore, it is necessary to be dehydrated before outer output oil.Produced Liquid is by isolated oil after preliminary treatment and containing greasy dirt Water, still includes oil slick, water and mud in oil-polluted water, and the water in oil-polluted water is mainly deposited in the form of WO emulsion .In order to separate water into out, the method for conventional treatment oil-polluted water includes microbial method, chemical method and Physical.
Using microorganism separation, it is necessary to add extraordinary microorganism, and it is higher to environmental requirement.
Chemical method mainly adds the flocculation medicament such as flocculant, demulsifier, water purification agent in oil-polluted water and promotes to contain greasy dirt Water-oil separating in water, but in end processing sequences, the sludge residue of substantial amounts of not recoverable can be produced;And add Substantial amounts of medicament, cost are higher.
Physical mainly includes two level sedimentation, first class pressure filtering or coagulant precipitation.Settled generally for convenient, physics Method can be used in combination with chemical method, it is necessary to add the medicaments such as a large amount of flocculants, be easy to point of oil slick in oil-polluted water, water and mud From.The applying date is 2005.4.25, Publication No. CN1854093A Chinese patent《Oil-containing sewage treatment technique and processing are set It is standby》;The applying date is 2009.11.2, and application publication number is CN102050532A Chinese patent《A kind of oil-contaminated water of oil field integrates Handling process》Oil-polluted water is handled by the way of Physical and chemical method combine.
But using Physical and chemical method to combine when handling oil-polluted water, early stage adds substantial amounts of flocculant, flocculation aid Deng medicament, increase larger burden for filter progress below.
The content of the invention
It is an object of the invention to provide a kind of not agent-feeding treatment oil-polluted water re-injection technique, using the side of physical separation Formula, the water of separation can direct re-injection, deoiling effect is good, the advantages of reducing oil slick body refuse.
The present invention above-mentioned technical purpose technical scheme is that:A kind of not agent-feeding treatment contains greasy dirt Water re-injection technique, is mainly included the following steps that:Oil-polluted water after settlement treatment, successively by aeration demulsification, cyclone air-flotation, Collision coalescence, micro- flotation and adsorption filtration, which handle to obtain, treats reinjected water;Automatic collecting oil device oil removing is added in settlement treatment technique, The mud mixture of each process section separation is collected to sludge-tank, and sedimentation layering obtains sludge blanket and supernatant liquor, sludge blanket warp Concentration heel row is crossed to go out.
Using above technical scheme, oil-polluted water is before cyclone air-flotation is entered, it is necessary to tentatively be located to oil-polluted water Reason, the preliminary manner of oil-polluted water can use settling tank or oil removing pot, and the oil-polluted water after standing is divided into oil Layer and oil-containing water layer are quick and largely collect oil reservoir, automatic collecting oil device are set at the top of settling tank or oil removing pot, greatly The oil reservoir of amount removes from settling tank or oil removing pot.When oil content is less than 500mg/L in the oil-polluted water by settlement treatment When, you can it is directly entered cyclone air-flotation and is separated again.If it is more than by oil content in the oil-polluted water of settlement treatment , it is necessary to carry out nitrogen aeration demulsification processing to the oil-polluted water after settlement treatment in advance during 500mg/L, oil-polluted water separates again Obtain the oil and treatment sewage of free state.So handle repeatedly, until oil content is less than 500mg/L in treatment sewage.
Cyclone air-flotation carries out profit initial gross separation to oil-polluted water, further reduces the sump oil in oil-polluted water.In order to subtract Gently in adsorption filtration, oil content is resulted in blockage too much in treatment sewage, and before adsorption filtration, oil-polluted water is carried out in advance Collision coalescence processing, carries out separating treatment to oil-polluted water again, and the sump oil of separation removes by micro- flotation;The water of separation passes through After adsorption filtration, suspension flocculence material therein is filtered, and the water of discharge, which is used as, treats reinjected water.
Caused mud mixture in each process section is collected, is separated after sedimentation and forms sludge blanket and supernatant liquor, Sludge blanket forms mud cake discharge after concentration, and mud cake can recycle again.
Further, the first oil-polluted water of cyclone air-flotation processing discharge carries out swirl flow air supporting by gas-liquid mixing pump Processing, isolated first oil reservoir, the second oil-polluted water layer and sludge blanket.
Using above technical scheme, oil-polluted water is after cyclone air-flotation is handled, and under the action of the centrifugal force, oil phase is to center Motion, aqueous phase realize profit initial gross separation to border movement.Now, the first isolated oil-polluted water passes through gas-liquid mixing pump And then secondary progress cyclone air-flotation handles to obtain the second oil-polluted water layer, the oil content in the second oil-polluted water layer is reduced to 10mg/L。
Further, mixed volume fraction is 2% dissolved gas in the second oil-polluted water layer, is divided after collision coalescence From the second oil reservoir and the 3rd oil-polluted water layer is obtained, the second oil reservoir carries out micro- flotation oil removing.
Using above technical scheme, the oil content in the second oil-polluted water layer has fallen to 10mg/L, now, olesome Very little, it is difficult to which removing is isolated by centrifugal force.Second oil-polluted water layer mixed dissolution gas, during by collision coalescence, if Dry droplet is merged into one compared with larger oil droplet in collision process, while dissolved gas wraps up in suspension and enters flotation circuit in a subtle way Place, further promotes water-oil separating.
Further, the 3rd oil-polluted water layer goes oil removal to obtain treating reinjected water by adsorption filtration.
3rd oil-polluted water layer passes through collision coalescence and micro- flotation circuit, and its oil content further reduces, poly- by colliding Some tiny suspensions can be produced after knot process.A part of suspension removes by micro- flotation circuit, another part suspension Removed by adsorption filtration, reduce the fine suspension in the 3rd oil-polluted water layer.
Further, backwash process is increased at adsorption filtration process, backwash process mixes backwash using gas and water, Air purge intensity 8L/m2S, washing intensity 4L/m2·s。
Using above technical scheme, the filter mediums such as quartz sand, cobble, activated carbon are set at adsorption filtration process, hanged Float is adsorbed in filter medium, after one section of usage time, influences the absorption property of filter medium.In adsorption filtration process Place sets backwash process, and is floated upwards with gas in flushing process using gas and water mixing backwash, suspension, Easily the suspension adsorbed on filter medium is removed.
Further, place is merged with oil-polluted water after filtered fluid and supernatant liquor removing oil slick of the sludge blanket after concentration Reason.
Using above technical scheme, in whole re-injection technical process, scum silica frost greasy filth caused by each section of process returns together Receive into sludge-tank, have oil removal process in each section of process.Therefore, it is recycled in the scum silica frost greasy filth in sludge-tank oil content very It is low, it is pressed into after mud cake, can recycles.Filtered fluid is produced when compressing mud cake, these filtered fluids mix with supernatant liquor, And the two can merge with oil-polluted water passes through re-injection PROCESS FOR TREATMENT again.
Further, by the first oil reservoir caused by cyclone air-flotation, by the second oil reservoir, Yi Jijing caused by collision coalescence Cross after sump oil caused by micro- flotation and adsorption filtration merges and be recycled in contaminated-oil basin.
Using above technical scheme, isolated oil reservoir can be concentrated back in each process of whole re-injection technique Receive, after treatment, go back recoverable.
Further, reinjected water re-injection after sterilizing unit, scale-proof apparatus processing.
Some bacteriums, corrosion product (such as Fe would generally be contained in oil-polluted water2O3、CaO、MgO、CaSO4、CaCO3Deng). Although in early stage processing procedure, some corrosion products can form precipitation or suspension removes, to ensure to pass through re-injection technique The reinjected water of processing reaches reinjection standard, and reinjected water need to carry out sterilization and scale-proof apparatus processing.
In summary, the invention has the advantages that:
1st, re-injection technique of the invention is settled without additionally adding flocculant.If oil content is more than 500mg/ in oil-polluted water During L, physics aeration demulsification is carried out in advance, the profit surface tension of oil-polluted water is destroyed, promotes water-oil separating, reach more than 60% Oil removal efficiency;
2nd, re-injection technique of the invention realizes oil using the methods of physics aeration and cyclone air-flotation, micro- flotation and collision coalescence Water termination is demulsified, and causes water emulsification in oil-polluted water serious in order to avoid adding excessive flocculant, and increase later stage emulsified water is processed into This;
3rd, larger amount of oil in oil-polluted water, after swirl flow air-flotation process, second are removed by swirl flow air supporting Oil content in oil-polluted water layer is reduced to 10mg/L;The small oil droplet that be will be dispersed in again by collision coalescence in the second oil-polluted water Coalescence forms larger oil droplet, is easy to carry out separating treatment to scattered small oil droplet;
4th, when oil-polluted water and gas mixing pass through cyclone air-flotation process, under the action of the centrifugal force, oil phase is to central motion, aqueous phase Profit initial gross separation is realized to border movement.In oil water separation process, after gas pressure-rupturable, the water around bubble is into bubble The heart impacts, and produces significant shock, reduces fouling;
5th, after re-injection PROCESS FOR TREATMENT of the oil-polluted water by the present invention, the separation of oil, water and scum silica frost greasy filth is realized, and can divide Class recycles to three class materials.Early stage is good using automatic collecting oil device deoiling effect, reduces the backwash week of adsorption filtration Phase.
Brief description of the drawings
Fig. 1 is the floor map of not agent-feeding treatment oil-containing sewage treatment system;
Fig. 2 is the structural representation for settling oil removing pot;
Fig. 3 is the sectional view of settling tank, to show oil receiving equipment structure;
Fig. 4 is the partial sectional view of rotating flow separators, to show feed end;
Fig. 5 is the structural representation of the first cavitation device;
Fig. 6 is the enlarged drawing of part A in Fig. 5, to show filter;
In figure, 1, sedimentation oil removing pot;11st, settling tank;111st, liquid injection port;112nd, fixed seat;12nd, oil receiving equipment structure;121st, support bar; 1211st, connecting rod;122nd, hinge assembly;1221st, fixed block;1222nd, hinge eyes;1223rd, bolt;123rd, oil collector;1231st, float Cylinder;1232nd, splash pan;1233rd, oilhole is received;1234th, collection tube;1235th, oil pump is received;13rd, heating pipe;2nd, eddy flow purification dress Put;21st, water inlet;22nd, the first cavitation device;221st, feeder;2211st, liquid feeding end;2212nd, vaporization chamber;2213rd, flowing hole; 222nd, discharging portion;2221st, temporary storage cavity;2222nd, outlet end;2223rd, buckling groove;223rd, filter;2231st, Access Division;3rd, air supporting Filter;4th, sterilizing unit;5th, contaminated-oil basin;6th, sludge-tank;7th, Stacked sludge dewatering machine.
Embodiment
The present invention is described in further detail with reference to embodiments.
Embodiment one:A kind of not agent-feeding treatment oil-polluted water re-injection system, as depicted in figs. 1 and 2, including be sequentially connected Settle oil removing pot 1, rotating flow separators 2, gas-flotation filter device 3 and sterilizing unit 4.Oil-polluted water enters sedimentation oil removing pot 1, It is divided into oil slick layer and sewage under Action of Gravity Field.Sewage further centrifuges into rotating flow separators 2, obtains oil phase and first Separation water.First separation water further separates into gas-flotation filter device 3, obtains secondary separation water and oil phase.Oil phase is discharged, and two Secondary separation water carries out disinfection processing into sterilizing unit 4, obtain can direct recharge reinjected water.In addition, in oil removing pot 1 is settled Oil receiving equipment structure 12 is set, and oil receiving equipment structure 12 is swum on liquid level all the time, is improved and is received oily effect.
With reference to Fig. 2 and Fig. 3, sedimentation oil removing pot 1 includes settling tank 11, and the upper end of settling tank 11 opens up liquid injection port 111, settling tank 11 set oil receiving equipment structure 12 at liquid injection port 111.Oil receiving equipment structure 12 includes support bar 121, and the one end of support bar 121 passes through be hinged Component 122 is connected with the side wall of settling tank 11, other end connection oil collector 123.Support bar 121 is using be hinged form, Yi Mianzhi Floating of the strut 121 to oil collector 123 impacts.Wherein, support bar 121 is formed by two sections of connecting rods 1211 are be hinged, two companies The length and the diameter of settling tank 11 that bar 1211 stretches are isometric, further improve the flexibility ratio of support bar 121.
The sidewall weld fixed seat 112 of settling tank 11, the connection site as hinge assembly 122.Hinge assembly 122 includes solid Determine block 1221, fixed block 1221 is fixed with fixed seat 112 by bolt 1223, and hinge eyes are also welded with fixed block 1221 1222, it is be hinged with connecting rod 1211 to facilitate.Oil collector 123 includes one group of floating drum 1231 swum on liquid level, this group of floating drum 1231 center position fixes splash pan 1232, and splash pan 1232 is fixed on the lower surface of this group of floating drum 1231, splash pan Opened up among 1232 and receive oilhole 1233 so that receive oilhole 1233 closer to liquid level.
Collection tube 1234 is connected at oilhole 1233 by the way of bonding or socket receiving, collection tube 1234 uses soft Pipe, reduce interference of the collection tube 1234 to oil collector 123.Collection tube 1234 is from being received oilhole 1233 to prolonging outside settling tank 11 Stretch, oil pump 1235 is received in one end connection that collection tube 1234 is stretched out outside settling tank 11.
In use, floating drum 1231 is swum on liquid level, splash pan 1232 is immersed in the opening position below liquid level, floating drum 1231 It can arbitrarily float, will not be limited by connecting rod 1211 in ullage.
Some local temperatures are relatively low, and the oil-polluted water fluidity in settling tank 11 is smaller, it is not easy to which cleaning swims in liquid level On oil slick.Therefore, in the outside winding heating pipe 13 of settling tank 11, need to meet corresponding peace when heating pipe 13 is installed Full standard.When carrying out oil removing using oil receiving equipment structure 12, heating pipe 13 is opened, oil-polluted water is kept certain fluidity i.e. Can.
With reference to Fig. 4, rotating flow separators 2 are such as awarded using conventional swirl-flow devices or cyclone air-flotation device, concrete structure Weigh shown in the patent that notification number is CN103303992B.It includes water inlet 21, and the rotating flow separators 2 in this programme are being intake First cavitation device 22 is set at mouth 21.
The structure that gas-flotation filter device 3 uses further carries as shown in Authorization Notice No. for CN203144144U patent High oil-water separation.And the second cavitation device (not shown) is installed at the charging aperture of gas-flotation filter device 3.
First cavitation device 22 and the second cavitation device use identical structure, specifically as shown in Figure 5 and Figure 6.With the first cavitation Exemplified by device 22, it includes feeder 221, and the discharging portion 222 being connected by screw bolts with feeder 221.Feeder 221 includes Liquid feeding end 2211, and the vaporization chamber 2212 connected with liquid feeding end 2211, vaporization chamber 2212 are in back taper.The back taper of vaporization chamber 2212 The upper end of shape opens up the flowing hole 2213 connected with discharging portion 222, and the diameter of flowing hole 2213 is less than the basal diameter of back taper. The temporary storage cavity 2221 connected with flowing hole 2213, the side vertical with flowing hole 2213 of temporary storage cavity 2221 are opened up in discharging portion 222 Outlet end 2222 is set.
Fluid flows into vaporization chamber 2212 from feed end, then enters temporary storage cavity 2221 through flowing hole 2213, through outlet end 2222 Into in rotating flow separators 2 or gas-flotation filter device 3.When fluid flows from vaporization chamber 2212 to flowing hole 2213, diameter Diminish, easily form eddy flow cavitation, further speed up and take away the tiny oil droplets in oil-polluted water.
In order to further improve eddy flow cavitation effect, the clamping filtering at the link position of feeder 221 and discharging portion 222 Plate 223, discharging portion 222 open up buckling groove 2223, and the circle that is peripherally and outwardly extended of filter 223 matches with buckling groove 2223 Access Division 2231.Fluid from feeder 221 flow to discharging portion 222 when, by filter 223, improve fluid resistance, increase is empty Change effect;And the impurity of bulky grain can be prevented to enter in cavitation device.Because feeder 221 and discharging portion 222 are detachably connected, It is convenient for changing filter 223.
Sterilizing unit 4 use heterogeneous catalytic oxidation ultraviolet sterilization device, with remove the sulfate reducing bacteria in oil-polluted water, Saprophytic bacteria and iron bacteria.
It is whole that floating oil collecting is not uniformly processed into contaminated-oil basin 5 caused by agent-feeding treatment oil-containing sewage treatment system;Entirely Sludge caused by agent-feeding treatment oil-containing sewage treatment system is not collected into sludge-tank 6, and passes through Stacked sludge dewatering machine 7 Handled.
Embodiment two:A kind of not agent-feeding treatment oil-polluted water re-injection technique, using the not agent-feeding treatment oil-containing of embodiment one Produced-water reinjection system detects to somewhere oil-polluted water station, and the oil content of wherein oil-polluted water is about 1.3kg/L.Oil-polluted water It is layered in injection sedimentation oil removing pot 1, settles and oil receiving equipment structure 12 is set at the liquid injection port of oil removing pot 1.Oil processing is received by 40min Afterwards, the oil slick collected from sedimentation oil removing pot 1 is layered, then is received oil processing by 20min and obtained oil-polluted water, now oil-containing Oil content in sewage is about 500mg/L.
Oil-polluted water is by aeration breaking device (not shown in figure, board-like breaking device is coalesced using conventional), in air-flow The lower oil-water interfaces destroyed in oil-polluted water of effect, form oil slick and treatment sewage.Treatment sewage enters by cyclone air-flotation One step realizes that water-oil separating obtains the first oil-polluted water.First oil-polluted water again passes by cyclone gas after gas-liquid mixing pump Floating processing, isolated first oil reservoir, the second oil-polluted water layer and sludge blanket.Nitrogen wherein is injected in cyclone air-flotation process, Gas injection rate is 5L/h, nitrogen pressure 0.5MPa.After cyclone air-flotation is handled, oil content is about in the second oil-polluted water layer 10mg/L。
Mixed volume fraction is 2% nitrogen in the second oil-polluted water, after collision coalescence, in the second oil-polluted water Small oil droplet condense to form big drop, isolated second oil reservoir and the 3rd oil-polluted water layer.Second oil reservoir is with molten gas by micro- Floatation process is discharged, and the 3rd oil-polluted water after adsorption filtration by obtaining treating reinjected water.Suspension in 3rd oil-polluted water layer Impurity is stayed on filter medium, to improve adsorption filtration efficiency, increases backwash process at adsorption filtration process, backwashed Cheng Caiyong gas-liquid mixed modes, wherein air purge intensity are 8L/m2S, washing intensity are 4L/m2·s。
Caused floating oil collecting is into contaminated-oil basin 5 in whole technological process, and caused sludge is collected in whole technological process Settlement treatment is carried out into sludge-tank 6, obtains sludge blanket and supernatant liquor, sludge blanket is handled using Stacked sludge dewatering machine 7 Form filtrate and mud cake.After skim-coat oil slick is removed in supernatant liquor and filtrate merging, with oil-polluted water merging treatment.
Further, since itself contain more bacterium in oil-polluted water, in order to reach reinjection standard, in adsorption filtration technique Increase sterilizing unit 4 and scale-proof apparatus 8 afterwards.Wherein sterilizing unit 4 uses heterogeneous catalytic oxidation sterilization technology, and scale-proof apparatus 8 uses Metal scale-proof apparatus, treat that reinjected water obtains the reinjected water that can directly irrigate after sterilizing unit 4 and scale-proof apparatus 8.
Oil-polluted water is entered before aeration breaking device, and the water quality flowed out from scale-proof apparatus 8 is analyzed, specific knot Fruit is as shown in table 1.
The oil-polluted water of table 1 is intake and the oil content of water outlet is analyzed
Caused oil slick body refuse amount is 0.16 ton in this process, and in order to accelerate sludge condensation, poly- third is added in oil slick body refuse Acrylamide 1.1ppm, sludge moisture content 72.1%, final Treatment of Sludge rate is up to 97%.
The bacterial treatment situation in crude oil sewage by the PROCESS FOR TREATMENT is as shown in table 2.
Table 2 by the PROCESS FOR TREATMENT crude oil sewage bacterial treatment situation
From data above, oil-polluted water passes through after the PROCESS FOR TREATMENT, reaches recharge standard, the bacterium drop in crude oil sewage As little as recharge requirement, Treatment of Sludge rate are up to 97%.Because deoiling effect early stage is preferable, the backwash time in adsorption filtration process Number reduces, and improves utilization rate of equipment and installations.
Embodiment three:A kind of not agent-feeding treatment oil-polluted water re-injection technique, contain in the oil-polluted water after receiving oil processing Oil mass is about 45mg/L, and the concrete outcome after this PROCESS FOR TREATMENT is as shown in table 3.
The oil-polluted water of table 3 is intake and the oil content of water outlet is analyzed
The relatively low oil-polluted water of oil content is handled, without adding aeration demulsification process, after technical process processing, oil-polluted water Recharge standard can be reached, Treatment of Sludge rate is up to 98%.
It should be understood that preparation method described in the embodiment of the present invention is only used for the explanation present invention, rather than to this The limitation of invention, the simple modifications of preparation method of the present invention are belonged under the concept thereof of the present invention claimed Scope.

Claims (8)

1. a kind of not agent-feeding treatment oil-polluted water re-injection technique, it is characterised in that mainly include the following steps that:Oil-polluted water passes through After settlement treatment, handle to obtain and treat re-injection by aeration demulsification, cyclone air-flotation, collision coalescence, micro- flotation and adsorption filtration successively Water;Automatic collecting oil device oil removing is added in settlement treatment technique, the mud mixture of each process section separation is collected to sludge-tank, Sedimentation layering obtains sludge blanket and supernatant liquor, and sludge blanket is discharged after concentration.
2. not agent-feeding treatment oil-polluted water re-injection technique according to claim 1, it is characterised in that:Cyclone air-flotation processing row The first oil-polluted water gone out carries out swirl flow air-flotation process, isolated first oil reservoir, the second oil-containing by gas-liquid mixing pump Sewage layer and sludge blanket.
3. not agent-feeding treatment oil-polluted water re-injection technique according to claim 2, it is characterised in that:Second oil-polluted water layer Middle mixed volume fraction is 2% dissolved gas, isolated second oil reservoir and the 3rd oil-polluted water layer after collision coalescence, Second oil reservoir carries out micro- flotation oil removing.
4. not agent-feeding treatment oil-polluted water re-injection technique according to claim 3, it is characterised in that:3rd oil-polluted water layer Oil removal is gone to obtain treating reinjected water by adsorption filtration.
5. not agent-feeding treatment oil-polluted water re-injection technique according to claim 4, it is characterised in that:In adsorption filtration process Place's increase backwash process, backwash process is using gas and water mixing backwash, air purge intensity 8L/m2S, washing intensity 4L/m2· s。
6. not agent-feeding treatment oil-polluted water re-injection technique according to claim 5, it is characterised in that:Sludge blanket is by concentration Rear filtered fluid and supernatant liquor remove after oil slick with oil-polluted water merging treatment.
7. not agent-feeding treatment oil-polluted water re-injection technique according to claim 5, it is characterised in that:Produced by cyclone air-flotation Raw the first oil reservoir, by the second oil reservoir caused by collision coalescence and by sump oil caused by micro- flotation and adsorption filtration It is recycled to after merging in contaminated-oil basin.
8. the not agent-feeding treatment oil-polluted water re-injection technique according to claim any one of 1-7, it is characterised in that:Reinjected water The re-injection after sterilizing unit, scale-proof apparatus processing.
CN201710962785.4A 2017-10-16 2017-10-16 Not agent-feeding treatment oil-polluted water re-injection technique Withdrawn CN107522310A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710962785.4A CN107522310A (en) 2017-10-16 2017-10-16 Not agent-feeding treatment oil-polluted water re-injection technique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710962785.4A CN107522310A (en) 2017-10-16 2017-10-16 Not agent-feeding treatment oil-polluted water re-injection technique

Publications (1)

Publication Number Publication Date
CN107522310A true CN107522310A (en) 2017-12-29

Family

ID=60685277

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710962785.4A Withdrawn CN107522310A (en) 2017-10-16 2017-10-16 Not agent-feeding treatment oil-polluted water re-injection technique

Country Status (1)

Country Link
CN (1) CN107522310A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110228859A (en) * 2019-05-29 2019-09-13 湖南宇宙环保工程有限公司 A kind of integrated high efficiency low pollution treatment process suitable for a variety of oily wastewaters
CN110436682A (en) * 2019-07-06 2019-11-12 中海石油(中国)有限公司天津分公司 A kind of offshore oilfield returns drain advanced treatment process
CN111115926A (en) * 2020-01-14 2020-05-08 浙江蓝景科技有限公司 Oily sewage treatment process
CN113354184A (en) * 2021-07-05 2021-09-07 于文星 Physical method treatment device and method for waste oil water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110228859A (en) * 2019-05-29 2019-09-13 湖南宇宙环保工程有限公司 A kind of integrated high efficiency low pollution treatment process suitable for a variety of oily wastewaters
CN110436682A (en) * 2019-07-06 2019-11-12 中海石油(中国)有限公司天津分公司 A kind of offshore oilfield returns drain advanced treatment process
CN111115926A (en) * 2020-01-14 2020-05-08 浙江蓝景科技有限公司 Oily sewage treatment process
CN113354184A (en) * 2021-07-05 2021-09-07 于文星 Physical method treatment device and method for waste oil water

Similar Documents

Publication Publication Date Title
CN107522310A (en) Not agent-feeding treatment oil-polluted water re-injection technique
RU2505335C2 (en) Method and device for multiphase fluid separation and their application
CN100579917C (en) Three-phase cyclone separator and cleaning treatment system for oil-containing water
CN201046371Y (en) Oil-contaminated water purifying three-phase cyclone separator
CN102807291B (en) Treatment method and equipment for oilfield produced water
CN109694116A (en) A kind of compounded mix unit, dynamic oil-water separating device and separation method using it
CN201132782Y (en) Purification device for oil-contaminated water and purification system with the device
CN202224253U (en) Swirler and gas flotation device
JPWO2015137484A1 (en) Ultrafine bubble cleaning method using liquid containing ultrafine bubbles, apparatus and pressurized flotation device
CN2644411Y (en) Modified oil removing apparatus
CN107082506B (en) Treatment method and process flow for oilfield produced water
CN103787527B (en) A kind of oil-contaminated water air-float suspended layer filtration unit
CN2725275Y (en) Integrated oil removing settling filter
CN111039434A (en) Oily sewage treatment process and system
CN102939268A (en) Ballast flocculation and sedimentation water treatment system with simplified sludge recirculation, and process therefor
CN203820565U (en) Oily sewage air floatation suspension layer filtering device
CN110228859A (en) A kind of integrated high efficiency low pollution treatment process suitable for a variety of oily wastewaters
CN207259251U (en) A kind of equipment for water-oil separating
CN108298741A (en) A kind of oily wastewater electric flocculation high-level cleaner
CN107721016A (en) A kind of oil-polluted water grease removal treatment device and processing method
CN209411951U (en) A kind of pretreatment system of semi-coke wastewater
CN206089115U (en) Oil -water separation tower
CN205740576U (en) A kind of oil-water separation processing means for oily waste water
CN109279710A (en) A kind of pretreatment system and method for semi-coke wastewater
CN213357164U (en) Integrated reaction separation and purification device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20171229