CN107522310A - Not agent-feeding treatment oil-polluted water re-injection technique - Google Patents
Not agent-feeding treatment oil-polluted water re-injection technique Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
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
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.
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Application publication date: 20171229 |