CN106219797A - A kind of micro-filtration membrane oilfield sewage treatment device and processing method - Google Patents
A kind of micro-filtration membrane oilfield sewage treatment device and processing method Download PDFInfo
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- CN106219797A CN106219797A CN201610445644.0A CN201610445644A CN106219797A CN 106219797 A CN106219797 A CN 106219797A CN 201610445644 A CN201610445644 A CN 201610445644A CN 106219797 A CN106219797 A CN 106219797A
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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
- C02F1/38—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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F2303/16—Regeneration of sorbents, filters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a kind of micro-filtration membrane oilfield sewage treatment device, including the flocculating sedimentation equipment being sequentially connected with, oil-water separator, multi-stage mechanical defecator and metal film filter；Wherein, multi-stage mechanical defecator includes the walnut shell filter being sequentially connected with, fine walnut shell filter, modified fiber ball filter and Two-layer filter.Sewage water treatment method is: remove pollutant at flocculating sedimentation equipment, sewage pumps into oil-water separator and separates, isolated aqueous phase sequentially passes through walnut shell filter, fine walnut shell filter, modified fiber ball filter, Two-layer filter and the filtration of metal film filter, obtains the aqueous phase of water quality reaching standard.The present invention is novel in design, runs safety and stability reliable, and respond well, can realize the purified treatment of oil field extracted water, make oil field extracted water reach reinjection standard.The present invention can realize gas and water associating backwash, it is ensured that backwash effect, it is possible to achieve the life-time service of device.
Description
Technical field
The invention belongs to disposing polluted water in oil technical field, be specifically related to a kind of micro-filtration membrane oilfield sewage treatment device, also
The method that relate to use this device to carry out sewage disposal.
Background technology
At present, China's major part oil field enters the middle and late stage of exploitation, creates substantial amounts of adopting in oil field development production process
Oily water, major part oil extraction-generated waste water re-injection oil reservoir after treatment.After disposing polluted water in oil, re-injection oil reservoir recovers the oil, both can protection ring
Border, has saved again substantial amounts of water resource, is cost-effective method.Oil extraction-generated waste water does not contain only petroleum-type composition, possibly together with solid
The Multiple components such as body float, oil emulsion, antibacterial and chemical agent (such as demulsifier, flocculant, antibacterial), if note people's water quality
Defective, when particularly in water filling, suspension content, suspended particle median particle size, oil content and various bacterial content exceed standard,
Easily cause formation blockage, cause formation damage, make gathering system produce corrosion and fouling with pit shaft so that water injection pressure raises.
At present, each oil field overwhelming majority uses traditional " old three sets " produced-water reinjection to process technique, i.e. with " coagulation one settles a filtration "
Based on, then it being aided with physics, chemistry and bioremediation etc., these methods generally having some limitations property, if sewage is through place
After reason, re-injection is the most up to standard or high in cost of production, and generally has that sewage disposal device is many, the problem of long flow path.
Metal film, owing to its mechanical strength is high, membrane flux is high, heat-conductive characteristic is good, is easily sealed to the advantages such as component,
Low permeability pay reinjected water is existing a range of research in processing, and applies in part engineering.Shengli Oil Field faces dish
Technique institute of oil recovery factory Zhang Cunli research shows, titanium microporous membrane filters is applied to face dish four and only stands, and uses multi-medium filtering
Device and the filtering process of titanium microporous membrane filters, after process, water quality index is up to standard, suspended solids content < 2.0mg/L, oil-containing
< 6mg/L, suspended solid median particle size < 1.5um.NW Hebei nobleness fort multi-purpose station is additionally arranged on the basis of original processing means
Corundum and metal film combine 3 grades of fine filtering separating technologies, and its on-the-spot adaptability and filter effect are tracked monitoring.
Monitoring Data shows: reinjected water average float mass concentration 1.39mg/L after new_type treatment, average median particle size
0.79um.But it is the most contaminated all to there is metal film in the application case of these metal films process oilfield sewage, causes membrane flux to drop
Problem that is low, that finally can not meet requirement of engineering.Showing after deliberation, the governing factor affecting metal film membrane flux is cake layer resistance
Power, accounts for more than the 60% of drag overall, and along with the increase of crossflow velocity, cake layer resistance reduces.It follows that face is formed
Cake layer be restriction metal film microfiltration oil field extracted water during permeation flux decline main cause.
At present, Sinopec Group applied for for water process integral microporous filtering method and
The patent of device: relate to a kind of for water process, especially water injection in low-permeability oilfield water treatment, wastewater treatment and reuse, height
The integral microporous filtering method of standard use water process and device thereof.The device of this invention is in a closing container, from entering
Water end (W.E.) is packaged with active carbon fiber felt filter course successively to water side, 5 micron order polyethylene (UHMWPE) filter plates, aperture are that 0.2-0.4 is micro-
The hollow fiber film assembly of rice.Water quality after the application present invention processes can respectively reach country's drinking pure water according to different occasions
Standard, water injection in low-permeability oilfield water standard and miscellaneous water water standard, treating capacity can the most arbitrarily devised combination,
Application number: 200510080206.0；But the problem of cake layer cannot solve, use flux depression after a period of time.Shandong
Hai Jiya environmental protection equipment company limited has applied for the patent of integrated continuous flow oil-containing waste water processing device: this disclosure of the invention is a kind of
Integrated continuous flow oil-containing waste water processing device, it is characterised in that device is followed by knockout drum, media regeneration tank, elevator pump, filtrate
Ring pump and connection manifold composition, knockout drum is vertical circular tank, is telescoping structure in tank body, and sleeve is built with filtrate and filter
Core, uses reverse flow reverse filtration, and is furnished with outside knockout drum continuously circulation eddy current and washes facility by rubbing with the hands, effectively prevents in filtrate circulation stifled
Plug pipeline and the generation of holddown phenomenon, filter element uses and is grouped the regeneration of air-blowing de-plugging in turn, it is ensured that integrated continuous flow oil-containing waste water
After the most properly functioning and process of processing means, water quality is qualified stable；Plant running is safe and reliable, and effect is qualified stable, can be wide
General application oil-polluted water continue to flow through filter purified treatment, it is also possible to for the oil of High water cut fault-block oilfield production fluid, mud, moisture
From, application number: 200810169325.7；But the processing accuracy of this scheme is the highest.
Investigated by background above it can be seen that the technical scheme that is disclosed patent exists membrane flux and can decline problem, and
The most high a series of problem of processing accuracy.
Summary of the invention
It is an object of the invention to provide a kind of micro-filtration membrane oilfield sewage treatment device, solving existing processing means can produce
Cake layer, the problem of flux depression.
It is a further object to provide the above-mentioned micro-filtration membrane oilfield sewage treatment device of use and carry out sewage disposal
Method, solves the problem that existing disposal methods precision is the highest.
A technical scheme of the present invention is, a kind of micro-filtration membrane oilfield sewage treatment device, including being sequentially connected with
Flocculating sedimentation equipment, oil-water separator, multi-stage mechanical defecator and metal film filter；Wherein, multi-stage mechanical mistake
Filter device includes the fine walnut shell filter of walnut shell filter, modified fiber ball filter and the double-layer filter material mistake being sequentially connected with
Filter.
Further, flocculating sedimentation equipment choosing HR-5 type tube settling water purifier, its inclined tube assembly is arranged on body refuse and hangs
Above floating layer, mounted angle is 60 degree.
Further, the standard ellipse type end socket that the end socket of oil-water separator uses ratio of long axis to short axis to be 2, filter into
Water outlet main pipe and aerofluxus blowdown supervisor's specification are all DN50；All use solvent-free inside the tank body of oil-water separator and manifold
Polyurethane anticorrosion, total build 200-250 μm.
Further, walnut shell filter select so that oil content not higher than 30ppm is standard in the water that filters out, essence
Selecting so that oil content not higher than 15ppm is standard in the water that filters out of thin walnut shell filter.
Further, the filter medium of modified fiber ball filter is the filtering material that dacron is made.
Further, Two-layer filter upper level filter medium is anthracite, and lower floor's filter medium is corundum；Described
ANTHRACITE FILTER MEDIA particle diameter is 1.2-1.6mm, porosity < 50%, anthracite filter height 600mm；Described corundum particle diameter of filter medium
For 0.5-0.8mm, corundum filter height 400mm.
Further, metal film filter uses titanium material film as filter medium, and described titanium material membrane filtration precision is 1um,
Length 500mm, external diameter 60mm, internal diameter 20mm.
Another technical scheme of the present invention is the method using said apparatus to carry out disposing polluted water in oil, including following step
Rapid:
S1, in flocculating sedimentation equipment add coagulant, make under the effect of coagulant the float in oilfield sewage coagulate
It is polymerized to floccule body, then removes pollutant by sedimentation or filtration；
S2, the sewage obtained by S1 by one-level elevator pump are pumped into oil-water separator and separate, by isolated
Aqueous phase divides and is passed through intermediate water tank；
S3, when in intermediate water tank, water level arrives the setting value of liquidometer, open multi-stage mechanical defecator and metal film
The water intaking valve of filter and outlet valve, pump into multi-stage mechanical defecator by second lift pump by the aqueous phase in intermediate water tank,
Make aqueous phase sequentially pass through walnut shell filter, fine walnut shell filter, modified fiber ball filter, Two-layer filter and
The filtration of metal film filter, obtains the aqueous phase of water quality reaching standard.
3rd technical scheme of the present invention is the back-washing method of said apparatus, the multi-stage mechanical defecator of the present invention and
Metal film filter all can carry out backwash by the method for gas backwash or water backwash；
When multi-stage mechanical defecator uses gas backwash, close all water backwash valves in multi-stage mechanical defecator, beat
Drive each draining valve, after oil extraction fully, close draining valve, start blower fan；Then open each backwash in multi-stage mechanical defecator to enter
Air valve and backwash air outlet valve, and close blower fan bypass valve；Restart blower fan backwash；
When multi-stage mechanical defecator uses water backwash, close all gas backwash valves, open multi-stage mechanical defecator
In all backwash water intaking valves and backwash outlet valve, start backwashing pump carry out water backwash；
When metal film filter uses water backwash, open metal film filter blowoff valve；Then opening intake valve, air inlet is filled
Valve intake valve is closed after Fen；Open backwash water intaking valve again, and startup backwashing pump is rinsed under blowoff valve opening；Rinse knot
Under blowoff valve opening, backwashing pump and backwash water intaking valve is closed after bundle；
When metal film filter uses gas backwash, open the draining valve of metal film filter, after oil row is abundant, close oil extraction
Valve, starts blower fan purging line；Then open backwash intake valve and the backwash air outlet valve of metal film filter, close blower fan bypass
Valve；Finally start blower fan, backwash 2 minutes.
Further, multi-stage mechanical defecator and metal film filter have been to take turns first to wash air purge the most again, backwash
Two-wheeled.
The invention has the beneficial effects as follows, the profit processing means of the present invention is novel in design, runs safety and stability reliable, and effect
Fruit is good, can realize the purified treatment of oil field extracted water, make oil field extracted water reach reinjection standard.The present invention can realize gas,
Water associating backwash, it is ensured that backwash effect, it is possible to achieve the life-time service of device.The present invention use metal film micro-filter technology and
Tangent screw water inlet technology, solves tradition oil field produced water treatment PROCESS FOR TREATMENT water quality the most up to standard, and metal film easily pollutes, cannot
The problem recovering regeneration, will not produce cake layer, not affect membrane flux.From the above mentioned, the present invention is that oil field extracted water process carries
A kind of streamlining, the integral sewage disposal process of facility compact and device are supplied.
Accompanying drawing explanation
Fig. 1 is the process chart of the micro-filtration membrane oilfield sewage treatment device of the present invention；
Fig. 2 is the structural representation of walnut shell filter and exquisite walnut shell filter；
Fig. 3 is the structural representation of Double-filter material filter；
Fig. 4 is the structural representation of modified fiber ball filter；
Fig. 5 is the structural representation of metal film filter；
Fig. 6 is the structural representation of oil-water separator.
In figure, 1. one-level elevator pump, 2. oil-water separator, 3. intermediate water tank, 4. two-stage hoisting pump, 5. walnut shell mistake
Filter, 6. fine walnut shell filter, 7. modified fiber ball filter, 8. Two-layer filter, 9. metal film filter.
Detailed description of the invention
The present invention is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings, but the present invention is not limited to
These embodiments.
As it is shown in figure 1, the present invention provides a kind of micro-filtration membrane oilfield sewage treatment device, including the flocculating sedimentation being sequentially connected with
Equipment, buffering water pot, oil-water separator 2, multi-stage mechanical defecator (walnut shell filter 5, fine walnut shell filter
6, modified fiber ball filter 7, Two-layer filter 8), metal film filter 9, backwash water pot.Wherein, rotational flow oil-water separates
Device 2, multi-stage mechanical defecator, metal film filter 9 may be contained within one and can be additionally provided with in equipment room in the equipment room of skid
One-level elevator pump 1, for pumping into oil-water separator 2 by the profit in buffering water pot；Oil-water separator 2 and multistage machine
Being provided with between tool defecator and be additionally provided with intermediate water tank 3 and two-stage hoisting pump 4, intermediate water tank 3 is used for storing rotational flow oil-water and divides
Isolating aqueous phase from device 2, intermediate water tank 3 is provided with liquidometer, and whether the operation of liquidometer control whole system.Two-stage hoisting pump 4
For the water of intermediate water tank 3 is pumped into multi-stage mechanical defecator, in equipment room divided by upper equipment outside, be additionally provided with explosion-proof light system
System, sewerage.Flocculating sedimentation equipment includes settling tank and tube settling water purifier.
Sewage first preliminary gravitational settling in the settling tank of flocculating sedimentation equipment, subsequently into tube settling water purifier,
And add coagulant flocculating sedimentation, and by the effect of coagulant, make the float in oilfield sewage be condensed into floccule body, rear by heavy
Pollutant are removed in fall or filtration.Sewage through flocculating sedimentation enters integration skid-mounted device.First carry through one-level elevator pump 1
Rise to oil-water separator 2, utilize centrifugal principle to be separated with water by oil.Oil-water separator 2 water outlet enters middle water
Case 3, intermediate water tank 3 water outlet utilizes second lift pump to be promoted to multilamellar mechanical filter unit.In multilamellar mechanical filter unit, dirty
Water first passes around walnut shell filter 5, utilizes large particulate matter and major part oils thing in the preliminary scrubbing water of walnut shell filter 5
Matter, walnut shell filter 5 water outlet enters fine walnut shell filter 6, utilizes fine walnut shell filter 6 to remove sewage further
Middle oil and big float, fine walnut shell filter 6 water outlet enters modified fiber ball filter 7, utilizes modified fiber ball mistake
Filter 7 removes oil-containing and mechanical admixture in water, and modified fiber ball filter 7 water outlet enters Double-filter material filter, utilizes filter
Interior double-layer filter material removes the oil in sewage and float, and Double-filter material filter water outlet enters metal film filter 9, utilizes metal film
Micron-sized suspended solid, oil emulsion and dissolved oil etc. in high-precision filtration sewage.
The preferred model of tube settling water purifier is the tube settling water purifier of HR-5 type；The inclined tube group of tube settling water purifier
Part is arranged on above body refuse superposed layer, and mounted angle is 60 degree.When the muddy sewage with alumen ustum or suspended solids is at inclined tube
During middle rising, suspended solids is agglomerated into thin mud layer at inclined tube surface collision, and under gravity, under tube, body refuse is returned in landing
Superposed layer, falls into sludge hopper then, mud valve enter sludge-tank supernatant and gradually rise up to water leg discharge.Tube settling is clean
Hydrophone, its corollary equipment includes intake pump, chemicals dosing plant, effusion meter, pipeline valve, pipe-line mixer and electricity cabinet control chamber.Add
Medicine device adds coagulant toward adding in inclined tube water purifier, by the effect of coagulant, makes the float in oilfield sewage be condensed into
Floccule body, rear by settling or filter removal pollutant.
As shown in Figure 6, oil-water separator 2 is arranged at and after elevator pump, before intermediate water tank 3, for preliminary
Separate suspended oil.Oil-water separator 2 is made up of tank body and manifold.Tank container is mainly by upper low head, cylinder, collection water distribution
The parts such as system frame, manhole form, the standard ellipse type end socket that end socket uses ratio of long axis to short axis to be 2.In manifold, filter turnover
Water supervisor and aerofluxus blowdown supervisor's specification are all DN50, and the size of other each pipeline is selected by specification flow velocity, the uniform cloth of main pipe
Put, be designed beautifully.Filter Inlet and outlet water supervisor and be provided with Inlet and outlet water thief hatch, the convenient process checking oil-water separator 2 at any time
Effect.The rust cleaning of oil-water separator 2 surface sand-blasting reaches Sa2 1/2 grade, and in tank body, critical component cyclone pipe uses rustless steel
304 materials, it is ensured that 15 years service life.Solvent-free polyurethane anticorrosion, total build 200-is all used inside tank body and manifold
250μm。
As in figure 2 it is shown, walnut shell filter have compact conformation, comprehensive, operate steadily, simple to operate, backwash is thorough
The end, the feature such as easy to maintenance, filter medium uses wild walnut shell, utilizes that wild walnut shell specific surface area is big, absorption oil and outstanding
The feature that float performance is strong, holding filth capacity is big.The present invention makes sewage fully filter by the setting of two-stage walnut shell filter.
Walnut shell filter 5 select so that oil content not higher than 30ppm is standard in the water that filters out, fine walnut shell filter 6
Select so that oil content not higher than 15ppm is standard in the water that filters out.Walnut shell filter is fully examined in flow scheme design
Considering the backwash and regeneration to filtrate, filter top is washed by rubbing with the hands for gas and is reserved enough spaces, and filtrate can be sufficient in filter tank
Washing by rubbing with the hands, the dirty thing making filter material surface adsorb thoroughly departs from, and then can take away dirty thing in water backwash process, and filtrate is through repeatedly
Gas and water associating backwash after reach optimum efficiency.This walnut shell filter, on the basis of air water associating backwash, on the one hand strengthens
Gas backwash intensity, reaches 10～12L/m2S, on the other hand adds the expansion space of filtrate, in order to filtrate is anti-at atm number
During washing can fully rubbing, expansion so that filtrate will not harden during life-time service；Walnut shell filter uses
Air water associating backwash, without sealing leak points such as rabbling mechanisms, fundamentally changes the run, drip, leak phenomenon of filter；Core
The Shang Bu water mechanism of peach shell filter and Xia Shou water mechanism all use stainless steel material, thus ensure that filtrate will not run off；Described
Walnut shell filter is equipped with sample tap on inlet/outlet pipeline.
As it is shown on figure 3, the filter medium of Double-filter material filter is anthracite and corundum, upper strata anthracite specific surface area
Greatly, absorption oil and float performance is strong, holding filth capacity is big, lower floor's corundum medium goes that oil removal is effective, mechanical strength is high, resistance to
Abrasion.Ground floor is anthracite, and this filtrate can play pre-filtered purpose, since it is considered that water inlet is containing a small amount of suspended oil,
If directly using corundum filtrate can affect its filter effect, so utilizing ANTHRACITE FILTER MEDIA to be possible not only to play pre-oil removing
Effect, it is also possible to float in preliminary removal water.The second layer is corundum, can play and well go oil removal effect, from
And reach finer filter effect.ANTHRACITE FILTER MEDIA uses high-quality exquisiteness anthracite, and particle diameter is 1.2-1.6mm, porosity <
50%, anthracite filter height 600mm；Described corundum filtrate is mainly composed of Al2O3, TiO2 etc., particle diameter 0.5-0.8mm,
Corundum filter height 400mm；Double-filter material filter uses the level that two kinds of main filtrates of anthracite and corundum are different with bed course
Joining, have certain difference in specific gravity, thoroughly, filtrate function divides clear, can make full use of the filtering function of each metafiltration material in layering, from
And reach high-precision filtering requirement.
As shown in Figure 4, modified fiber ball filter 7 filtering layer compared with general fibre ball filter is high, and filtrate is fine, water outlet
Stable accuracy, service life is long, and backwash thoroughly ensures that high-precision filtration water quality, the filter medium of modified fiber ball filter 7 are
The reversible fiber filtering of parents；The reversible fiber filtering of parents is the ball that is fabricated to of dacron or flat spheroid, uses this filter
Material filtering velocity can reach 20～85m/h, and the loss of flood peak is little, holding filth capacity is big, backwash and regeneration is convenient, and the backwash water yield accounts for and filters the water yield
1～about 3%.The reversible fiber filtering of parents, intensity reaches 4～6 g denier, doubles than Cotton Gossypii, more three times higher than Pilus Caprae seu Ovis, and
There is excellent sunlight resistance, wearability, resistance to acids and bases and resistance to biological.The reversible fiber filtering of parents is flexible, full of elasticity, filter
Layer space is variable, forms whole filtering layer bottom hole less in filtering layer, the filtering layer distribution that top hole is bigger.At the initial stage of filtration
Upper strata filtrate adsorbs and the oil in trap water and particle at first, along with the passage upper strata filtrate soil pick-up of filtration time gradually becomes
In saturated, and the most down metafiltration material passage, lower floor's filtrate hole reduces, and filtering layer is compacted, and along with the prolongation of filtration time, goes out
Water water quality will not be deteriorated on the contrary, can give full play to filtrate deep layer and cut the ability of dirt, both can guarantee that float was not pierced, and can protect again
Card outlet effect, finally terminates filter cycle with the termination of the loss of flood peak.
As it is shown in figure 5, metal film filter 9 uses titanium material film as filter medium, titanium material film is with industrial high-purity titanium valve
(99.4%) it is raw material, after sub-sieve, cold isostatic compaction, high temperature, the micro-filtration element of high-vacuum sintering, thus titanium
Film is with hitech materials composition and Special moulding process so that it is have the premium properties of uniqueness: uniform pore diameter, hole shape are stablized, divided
High from efficiency, porosity is high, filtration resistance is little, osmotic efficiency is high, high temperature resistant, normally can use, chemically stable below 280 degree
Property good, acid-alkali-corrosive-resisting (PH2-12), there is antioxygenic property, without particles from getting loose, do not make stock solution formed secondary pollution, mechanicalness
Can be good, pressure reduction is low, flow is big, can filter pressing can sucking filtration, simple to operate, anti-microbe ability by force, does not reacts with microorganism, easily
Clean, service life long, moulding process is good, overall welding.The preferred 0.8-1.2um of titanium film filtering accuracy of the present invention, length
Preferably 400-600mm, the preferred 50-60mm of external diameter, the preferred 15-25 of internal diameter；Metal film filter 9 water inlet uses tangent screw to enter
Water, water inlet flow velocity, more than 2m/s, makes the liquid in whole container produce agitation, is kinestate relative to metal film, reduce gold
Belong to the contamination on film surface, reduce the operating pressure of metal film.Metal film filter 9 adds concentrated water spout, and concentrated water spout discharge capacity is for being
System runs the 20% of the water yield, it is to avoid the most stifled, the shortcoming of regeneration difficulty that conventional filters dead-end filtration brings, thus extends
The service life of metal film.
Assembly of the invention use PLC automatically control, control valve use Pneumatic butterfly valve, and be provided with pressure switch protection system
The parts of system are without damage.
Use said apparatus that oilfield sewage is processed, specifically include following steps:
S1, unlatching flocculating sedimentation equipment: enter medicine valve by flocculating sedimentation equipment two of chemicals dosing plant and get to requirement
Aperture；Open inlet valve, open intake pump and dosing pump, regulating water inlet valve door, make flow be maintained at about 5t/h；Blowdown mud
Process is automated procedure, sets 6 hours spoil disposals once, each spoil disposal 2 minutes.Also spoil disposal can manually be carried out；Work at coagulant
Make the float in oilfield sewage be condensed into floccule body under with, then remove pollutant by sedimentation or filtration；
S2, unlatching oil-water separator 2, regulation inlet outlet pressure differential controls at 0.2Mpa, and ensures that oil drain out has on a small quantity
Discharge opeing, after adjustment, pumps into oil-water separator 2 by one-level elevator pump 1 by the sewage of S1；Isolated aqueous phase is divided
It is passed through intermediate water tank 3；Liquidometer in intermediate water tank 3, whether the operation of liquidometer control whole system.
S3, when in intermediate water tank 3, water level arrives the setting value of liquidometer, open multi-stage mechanical defecator and metal film
The water intaking valve of filter 9 and outlet valve, pump into multi-stage mechanical by two-stage hoisting pump 4 by the aqueous phase in intermediate water tank 3 and filter dress
Put, make aqueous phase sequentially pass through walnut shell filter 5, fine walnut shell filter 6, modified fiber ball filter 7, double-layer filter material mistake
Filter 8 and the filtration of metal film filter 9, obtain the aqueous phase of water quality reaching standard.During filtration, mechanical filter unit and metal film mistake
The draining valve of filter 9 was opened 2 minutes at interval of 2 hours, obtained isolated oil phase.
The multi-stage mechanical defecator of apparatus of the present invention and metal film filter 9 all can be by gas backwash or the sides of water backwash
Method carries out backwash.
The gas back-washing method of multi-stage mechanical defecator is specifically implemented according to following steps:
S1, open walnut shell filter 5, fine walnut shell filter 6, modified fiber ball filter 7, double-layer filter material filter
Device 8 draining valve；
S2, within about 30 seconds after draining valve reaches position, make oil row fully after, close draining valve, draining valve closes after putting in place, opens
Wind symptom machine purging line；
S3, the backwash intake valve opening each filter in multi-stage mechanical defecator and backwash air outlet valve, treat backwash air inlet
After valve and backwash air outlet valve reach position, close blower fan bypass valve；
S4, startup blower fan, backwash 2 minutes.
Multi-stage mechanical defecator water back-washing method is specifically implemented according to following steps:
S1, close all gas backwash valves.
S2, open walnut shell filter 5, fine walnut shell filter 6, modified fiber ball filter 7, double-layer filter material filter
The backwash water intaking valve of device makes to be full of in filter water；
S3, open backwash outlet valve；
S4, startup backwashing pump；
S5, backwashing pump start 3 minutes.
Metal film filter 9 gas back-washing method is specifically implemented according to following steps:
S1, open the draining valve of metal film filter 9；
S2, within about 30 seconds after draining valve reaches position, make oil row fully after, close draining valve, draining valve closes after putting in place, opens
Wind symptom machine purging line；
S3, open metal film filter 9 backwash intake valve and backwash air outlet valve, treat that backwash intake valve and backwash are given vent to anger
After valve reaches position, close blower fan bypass valve；
S4, startup blower fan, backwash 2 minutes.
Metal film filter 9 water back-washing method is specifically implemented according to following steps:
S1, open the metal film filter 9 abundant blowdown of blowoff valve；
S2, open intake valve air inlet in about 10 seconds and close valve the most afterwards；
S3, open backwash water intaking valve, and start backwashing pump (keeping blowoff valve opening), rinse 3 minutes；
S4, closedown backwashing pump and backwash water intaking valve (keeping blowoff valve opening).
Optimal backwash mode is that multi-stage mechanical defecator and metal film filter 9 are the most first to wash air purge for one again
Wheel, backwash two-wheeled.
Embodiment
Experiment condition: the injection water quality extending many oil recoveries field, oil field is imitated owing to being processed by multi-purpose station waste water processes
, there is situation about significantly exceeding standard, plans to build a set of micro-filtration membrane oilfield sewage at deckle oil recovery factory 1876 treating stations in the restriction of fruit
Processing integration skid-mounted device and carry out sewage disposal technology research, experimental result is as shown in table 1:
Table 1 water outlet water sample float particle diameter is distributed
As seen from Table 1, the float particle diameter distribution of the oil field extracted water after microfiltration film sewage processor processes is all
Between 91.28～955.4nm, suspended particle median particle size is less than 1 μm, and this index has reached " clastic rock reservoir water
Water quality index and analyze method " requirement.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.Any
Those skilled in the art, equivalent variations done on the premise of without departing from the design of the present invention and principle and amendment, all
The scope of protection of the invention should be belonged to.
Above description of the present invention is section Example, but the invention is not limited in above-mentioned detailed description of the invention.
Above-mentioned detailed description of the invention is schematic, is not restrictive.The material of every employing present invention and method, do not taking off
In the case of present inventive concept and scope of the claimed protection, all concrete expansions all belong to protection scope of the present invention it
In.
Claims (10)
1. a micro-filtration membrane oilfield sewage treatment device, it is characterised in that include flocculating sedimentation equipment, the eddy flow oil being sequentially connected with
Water separator, multi-stage mechanical defecator and metal film filter；Wherein, multi-stage mechanical defecator includes the core being sequentially connected with
Peach shell filter, fine walnut shell filter, modified fiber ball filter and Two-layer filter.
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described flocculating sedimentation equipment is
HR-5 type tube settling water purifier, its inclined tube assembly is arranged on above body refuse superposed layer, and mounted angle is 60 degree.
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described oil-water separator
End socket use ratio of long axis to short axis be 2 standard ellipse type end socket, filter Inlet and outlet water supervisor and aerofluxus blowdown supervisor specification be all
DN50；Solvent-free polyurethane anticorrosion, total build 200-250 μ is all used inside the tank body of oil-water separator and manifold
m。
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described walnut shell filter
Selecting so that oil content not higher than 30ppm is standard in the water that filters out, the selection of fine walnut shell filter is so that filtering out
Water in oil content not higher than 15ppm be standard.
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described modified fiber ball filters
The filter medium of device is the filtering material that dacron is made.
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described Two-layer filter
Upper level filter medium is anthracite, and lower floor's filter medium is corundum；Described ANTHRACITE FILTER MEDIA particle diameter is 1.2-1.6mm, hole
Rate < 50%, anthracite filter height 600mm；Described corundum particle diameter of filter medium is 0.5-0.8mm, corundum filter height
400mm。
Micro-filtration membrane oilfield sewage treatment device the most according to claim 1, it is characterised in that described metal film filter is adopted
With titanium material film as filter medium, described titanium material membrane filtration precision is 1um, length 500mm, external diameter 60mm, internal diameter 20mm.
8. one kind uses the method that device as according to any one of claim 1-7 carries out sewage disposal, it is characterised in that include
Following steps:
S1, in flocculating sedimentation equipment add coagulant, make the float in oilfield sewage be condensed under the effect of coagulant
Floccule body, then remove pollutant by sedimentation or filtration；
S2, the sewage obtained by S1 by one-level elevator pump are pumped into oil-water separator 2 and separate, by isolated aqueous phase
Divide and be passed through intermediate water tank；
S3, when in intermediate water tank, water level arrives the setting value of liquidometer, open multi-stage mechanical defecator and metal membrane filter
The water intaking valve of device and outlet valve, pump into multi-stage mechanical defecator by second lift pump by the aqueous phase in intermediate water tank, make water
Sequentially pass through walnut shell filter, fine walnut shell filter, modified fiber ball filter, Two-layer filter and metal mutually
The filtration of film filter, obtains the aqueous phase of water quality reaching standard.
9. the back-washing method of a device as according to any one of claim 1-7, it is characterised in that described multi-stage mechanical filters
Device and metal film filter all can carry out backwash by the method for gas backwash or water backwash；
When multi-stage mechanical defecator uses gas backwash, close all water backwash valves in multi-stage mechanical defecator, open each
Draining valve, cuts out draining valve after oil extraction fully, starts blower fan；Then each backwash intake valve in multi-stage mechanical defecator is opened
With backwash air outlet valve, and close blower fan bypass valve；Restart blower fan backwash；
When multi-stage mechanical defecator uses water backwash, close all gas backwash valves, open institute in multi-stage mechanical defecator
There are backwash water intaking valve and backwash outlet valve, start backwashing pump and carry out water backwash；
When metal film filter uses water backwash, open metal film filter blowoff valve；Then intake valve is opened, after air inlet fully
Close valve intake valve；Open backwash water intaking valve again, and startup backwashing pump is rinsed under blowoff valve opening；After flushing terminates
Backwashing pump and backwash water intaking valve is closed under blowoff valve opening；
When metal film filter uses gas backwash, open the draining valve of metal film filter, close draining valve after oil row is abundant, open
Wind symptom machine purging line；Then open backwash intake valve and the backwash air outlet valve of metal film filter, close blower fan bypass valve；Finally
Start blower fan, backwash 2 minutes.
Back-washing method the most according to claim 9, it is characterised in that multi-stage mechanical defecator and metal film filter
It has been to take turns first to wash again air purge the most, backwash two-wheeled.
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Application publication date: 20161214 |