CN204058090U - A kind of high-efficiency oilfield reinjected water treatment system - Google Patents
A kind of high-efficiency oilfield reinjected water treatment system Download PDFInfo
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- CN204058090U CN204058090U CN201420434946.4U CN201420434946U CN204058090U CN 204058090 U CN204058090 U CN 204058090U CN 201420434946 U CN201420434946 U CN 201420434946U CN 204058090 U CN204058090 U CN 204058090U
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Abstract
A kind of high-efficiency oilfield reinjected water treatment system.Provide a kind of production cost low, the high-efficiency oilfield reinjected water treatment system that good separating effect, efficiency are high and method thereof.Comprise the coalescer be communicated with water intaking valve, described coalescer connects swirler successively, air floatation machine, coarse filtration tank and film tank, described coalescer has water-in, oil outlet, water outlet and small space betddn slanting board sedimentation, described swirler is tapered, inside is provided with cyclone pipe and the current stabilization cover of conical helical pattern, described air floatation machine comprises air floatation machine body, air floatation machine water-in, air floatation machine water outlet, air floatation machine oil outlet, air dissolved pump, pressure-pot, the float switch of two groups of submersible sewage pumps and some different heights, described coarse filtration tank comprises coarse filtration tank body, the pusher stirrer of eddy flow, walnut shell filtering material, coarse filtration tank water-in, coarse filtration tank water outlet and coarse filtration tank oil outlet, filter core is provided with in described film tank.The utility model design is ingenious, and good filtration effect, production cost is low.
Description
Technical field
The utility model relates to sewage treatment area, particularly relates to a kind of oil field reinjection water treatment system.
Background technology
A kind of sewage of oil-containing can be produced in the process in exploitation oil field, be the oil in extraction sewage and part active substance, need process this sewage, the sewage after processing can be recycled, reduce production cost, avoid waste water resource.
Current sewage conventional treatment method is: first grade subsides → secondary sedimentation → surge tank → single filter → cascade filtration → go out water storage tank, because the treatment apparatus efficiency such as conventional stage sedimentation, secondary inclined plate sedimentation are lower, the residence time is long, therefore counter investment cost, take up an area all very large.Simultaneously because equipment flowsheet is long, treatment facility is many, causes operating maintenance inconvenient, the shortcomings such as working cost is high.
Usually adopt the method for natural subsidence and tube settler to sewage disinfection treatment in prior art, its principle of work is respectively simultaneously:
One, natural subsidence: sedimentation is the process of solid-liquid separation or Liquid liquid Separation, under gravity, relies on suspended particle to be separated with the density difference of water with oil droplet.Density is greater than the sinking of water, is less than the floating of water.Settling process is generally only suitable for removing the particle (relevant with the character of particle, proportion) of more than 20-100 μm.The particle of natural subsidence is in discrete state in settling process, and its shape, size, quality all do not change, and settling velocity is interference-free;
Two, tube settler: tube settler adopts " shallow layer settling ", theoretical also known as " sedimentation of shallow pond ".Namely when other condition is identical, the transport disengaging height for waste-oil scavenger is less, and the time that oil droplet floats to needed for surface is shorter.For precipitation apparatus, reduce the degree of depth of settling bowl, can sedimentation time be shortened, thus reduce the volume of settling bowl, also just can improve settling efficiency.
But this two classes subsidence style all brings the problems such as the settling time is long, and efficiency is low, inferior separating effect, have a strong impact on oilfield exploitation progress and contain wastewater treatment efficiency.
Utility model content
The utility model, for above problem, provides a kind of production cost low, the high-efficiency oilfield reinjected water treatment system that good separating effect, efficiency are high.
The technical solution of the utility model is: comprise the coalescer be communicated with water intaking valve, and described coalescer connects swirler, air floatation machine, coarse filtration tank and film tank successively, and wherein said coalescer, swirler, air floatation machine, coarse filtration tank are all communicated with contaminated-oil basin with film tank;
Described coalescer has water-in, oil outlet, water outlet and small space betddn slanting board sedimentation, described water-in is located at the below of described small space betddn slanting board sedimentation, and described oil outlet and described water outlet to be located at above described small space betddn slanting board sedimentation and to be laid respectively at the both sides of described small space betddn slanting board sedimentation;
Described swirler is tapered, inside is provided with cyclone pipe and the current stabilization cover of conical helical pattern, described cyclone pipe linearly type is arranged, is comprised import, eddy flow chamber, contraction chamber, tail cone, tail pipe, underflow opening and overflow port, described current stabilization covers between described contraction chamber and described tail cone, described current stabilization cover comprises oil extraction section and inlet segment, described oil extraction section is located in described inlet segment and the end face of described oil extraction section is concordant with the end face of described inlet segment, the center of described oil extraction section is provided with current stabilization cover oil discharge outlet, and described inlet segment is provided with tangential water inlet;
Described air floatation machine comprises the float switch of air floatation machine body, air floatation machine water-in, air floatation machine water outlet, air floatation machine oil outlet, air dissolved pump, pressure-pot, two groups of submersible sewage pumps and some different heights, described pressure-pot one end connects on the described air floatation machine body of described air floatation machine water-in side, the other end connects described air dissolved pump, the other end of described air dissolved pump connects on the described air floatation machine body of described air floatation machine water outlet side, and described submersible sewage pump is connected in parallel and is communicated with described coarse filtration tank;
Described coarse filtration tank comprises coarse filtration tank body, eddy flow pusher stirrer, walnut shell filtering material, coarse filtration tank water-in, coarse filtration tank water outlet and coarse filtration tank oil outlet, the top of described coarse filtration tank body is located at by the pusher stirrer of described eddy flow, and the height of described coarse filtration tank water-in is lower than the height of described walnut shell filtering material;
Filter core is provided with in described film tank.
Described small space betddn slanting board sedimentation comprises framework and some wavy screen plates, and described framework is provided with some slots, and described screen plate is located in described framework by described slot is oblique.
Spacing between described screen plate is 28mm-32mm.
The bubble diameter that described air floatation machine produces is 20um-50um.
Described filter core is the highly purified titanium valve of 99.6%, obtains through high temperature sintering.
In the utility model, sewage is after the operation process such as removal of impurities, oily water separation, filtration, water treatment effect is better than treatment process conventional in prior art, utilize swirler to carry out oily water separation simultaneously, and cyclone pipe adopts straight line drainage process, the oil extraction resistance of swirler can be reduced to greatest extent, the center current stabilization cover in swirler indoor design, avoid the generation of " short circuit " situation between entrance and oil discharge outlet, the interference simultaneously also making inlet fluid be subject to reduces, and Performance And Reliability improves further.The utility model design is ingenious, and good filtration effect, production cost is low.
Accompanying drawing explanation
Fig. 1 is this practical schematic flow sheet,
Fig. 2 is that in Fig. 1, small space betddn slanting board sedimentation filters schematic diagram,
Fig. 3 is I place close-up schematic view in Fig. 2,
Fig. 4 is the structural representation of swirler in Fig. 1,
Fig. 5 is the structural representation of current stabilization cover in Fig. 4,
Fig. 6 is the sectional view of Fig. 5,
Fig. 7 is the structural representation of coarse filtration tank in Fig. 1;
In figure, 1 is coalescer, 11 is water intaking valves, 12 is small space betddn slanting board sedimentations, 121 is frameworks, 122 is screen plates, 2 is swirlers, 21 is Turo pumps, 22 is cyclone pipes, 221 is imports, 222 is eddy flow chambeies, 223 is contraction chambers, 224 is tail cones, 225 is tail pipes, 226 is underflow openings, 227 is overflow ports, 23 is current stabilization covers, 231 is oil extraction sections, 2311 is current stabilization cover oil discharge outlets, 232 is inlet segments, 2321 is tangential water inlets, 3 is air floatation machines, 31 is air dissolved pumps, 32 is pressure-pots, 33 is submersible sewage pumps, 34 is float switches, 35 is air floatation machine bodies, 36 is air floatation machine water-ins, 37 is air floatation machine water outlets, 38 is air floatation machine oil outlets, 4 is coarse filtration tanks, 41 is coarse filtration tank bodies, 42 is the pusher stirrers of eddy flow, 43 is walnut shell filtering materials, 44 is coarse filtration tank water-ins, 45 is coarse filtration tank water outlets, 46 is coarse filtration tank oil outlets, 5 is film tanks, 6 is clean water basin, 7 is contaminated-oil basins.
Embodiment
The utility model as shown in figs. 1-7, comprise the coalescer 1 be communicated with water intaking valve 11, described coalescer 1 connects swirler 2, air floatation machine 3, coarse filtration tank 4 and film tank 5 successively, wherein said coalescer 1, swirler 2, air floatation machine 3, coarse filtration tank 4 are all communicated with contaminated-oil basin 7 with film tank 5, and the greasy dirt obtained after being convenient to every procedure process can be unified to be processed;
Described coalescer 1 has water-in, oil outlet, water outlet and small space betddn slanting board sedimentation 12, described water-in is located at the below of described small space betddn slanting board sedimentation 12, and described oil outlet and described water outlet to be located at above described small space betddn slanting board sedimentation 12 and to be laid respectively at the both sides of described small space betddn slanting board sedimentation 12;
Described small space betddn slanting board sedimentation 12 comprises framework 121 and some wavy screen plates 122, described framework 121 is provided with some slots, described screen plate 122 is located in described framework 121 by described slot is oblique, and the spacing between described screen plate 122 is 28mm-32mm; Make when same linear distance by described screen plate 122 is arranged in wavy, the operation distance of sewage increases, namely the time that sewage stops in described small space betddn slanting board sedimentation 12 is extended, wavy screen plate makes the impurity in sewage strike on filtration wooden partition simultaneously, thus make it fall, precipitate, strengthen filtration treatment effect.
Described swirler 2 is tapered, inside is provided with cyclone pipe 22 and the current stabilization cover 23 of conical helical pattern, the linearly type arrangement of described cyclone pipe 22, comprise import 221, eddy flow chamber 222, contraction chamber 223, tail cone 224, tail pipe 225, underflow opening 226 and overflow port 227, described current stabilization cover 23 is located between described contraction chamber 223 and described tail cone 224, described current stabilization cover 23 comprises oil extraction section 231 and inlet segment 232, described oil extraction section 231 is located in described inlet segment 232 and the end face of described oil extraction section 231 is concordant with the end face of described inlet segment 232, the center of described oil extraction section 231 is provided with current stabilization cover oil discharge outlet 2311, described inlet segment 232 is provided with tangential water inlet 2321, through described eddy flow chamber 222 high speed rotating after sewage enters described cyclone pipe 22, after described contraction chamber 223 secondary rotates, centrifugal force reduces to some extent, now add described current stabilization cover 23 (being tangential when sewage enters), three swirler is carried out to sewage, wick and water are isolated herein simultaneously, avoid the generation of " short circuit " situation between entrance and oil discharge outlet, the interference simultaneously also making inlet fluid be subject to reduces, Performance And Reliability improves further.
Described air floatation machine 3 comprises air floatation machine body 35, air floatation machine water-in 36, air floatation machine water outlet 37, air floatation machine oil outlet 38, air dissolved pump 31, pressure-pot 32, the float switch 34 of two groups of submersible sewage pumps 33 and some different heights, described pressure-pot 32 one end connects on the described air floatation machine body 35 of described air floatation machine water-in 36 side, the other end connects described air dissolved pump 31, the other end of described air dissolved pump 31 connects on the described air floatation machine body 35 of described air floatation machine water outlet 37 side, so that described air dissolved pump 31 is able to continuously, circulating injects air in described air floatation machine 3, described submersible sewage pump 33 is connected in parallel and is communicated with described coarse filtration tank 4, the described float switch 34 arranging different heights can in real time according to the level switch of different heights in described air floatation machine 3,
Described coarse filtration tank 4 comprises coarse filtration tank body 41, eddy flow pusher stirrer 42, walnut shell filtering material 43, coarse filtration tank water-in 44, coarse filtration tank water outlet 45 and coarse filtration tank oil outlet 46, the top of described coarse filtration tank body 41 is located at by the pusher stirrer 42 of described eddy flow, and the height of described coarse filtration tank water-in 44 is lower than the height of described walnut shell filtering material 43;
Be provided with filter core in described film tank 5, described filter core is the highly purified titanium valve of 99.6%, obtains through high temperature sintering.
Process method step of the present utility model is as follows:
1), primary settling, removal of impurities: the sewage produced in oil extraction process enters settling bowl, remove that volume in sewage is large, the impurity of Heavy Weight, realize primary settling, prevent that volume is large, the problem such as impurity in weight results in blockage to equipment after entering waste disposal plant, wearing and tearing, also improve the efficiency of later stage sewage disposal simultaneously;
After oettIed sewage enters the small space betddn slanting board sedimentation of coalescer by water intaking valve, the part oil droplet in sewage floats, and enters contaminated-oil basin through oil outlet, and suspended solid sinks, and be sunken to bottom coalescer, the sewage after removal of impurities enters swirler;
2), oily water separation: oil-water mixture flows into separator after entering the import of swirler by Turo pump, forms helicoidal flow; Shrink through contraction chamber, tail cone two-stage, make fluid speedup and form a stable centrifuge field in the inside of separator; According to stokes (stokes) law, in oil-water mixture heavy phase water thrown under powerful centrifugal action swirler inwall helically state discharge from underflow opening, and flow into contaminated-oil basin, light oil is mutually then to the coalescent formation wick in center of separator, discharge from overflow port, realize oily water separation;
Hydrocyclone when running continuously, shown in following table, under the oil droplet size distribution situation of separation efficiency
3), fine separation: still containing the greasy dirt being difficult to be separated in the sewage after step 2 processes, enter air floatation machine, the bubble produced by air floatation machine and oil droplet are collided, and increase in conjunction with the oil droplet lift velocity after bubble, and the bubble diameter that described air floatation machine produces is 20um-50um; By reducing bubble diameter, increase bubble and oil droplet probability of collision, raising separation efficiency, thus solid-liquid separation or oily water separation more thorough; Solid impurity in sewage (such as fiber, bag, band, grass, cloth) is torn, is cut off by the submersible sewage pump simultaneously in air floatation machine, makes sewage enter coarse filter;
The principle of work of air floatation machine is as follows:
Air flotation technology can draw following formula (supposing that in water, flocs with gas or oil droplet are spherical) according to Newton's second law
Formula one, in region of quadratic resistance law, according to Newton's formula:
V=1.83SQR [(ρ
water-ρ
wadding)/ρ
water] gd
Formula two, in laminar region according to Stokes'formula:
V=g/18u (ρ
water-ρ
wadding) d
2
Formula three, in zone of transition, according to Allan formula:
V=0.22 [(ρ
water-ρ
wadding)/ρ
water]
2/3d/u
1/3
In formula one to formula three:
ρ
water: the density g/cm of water
3;
G: universal gravity constant cm/s
2;
ρ
wadding: flocs with gas or oil droplet density g/cm
3;
U: stagnant coefficient cm is stained with in motion
2/ s;
D: flocs with gas diameter (or characteristic diameter);
Can find out from formula one to formula three, no matter be in that a kind of streams, the ascent rate v of flocs with gas (or oil droplet) depends on the density difference of water and flocs with gas (or oil droplet), the diameter of flocs with gas (or oil droplet) and the temperature of water and fluidised form.If bubble proportion is larger in flocs with gas (or oil droplet), then the density of flocs with gas (or oil droplet) is less, and its characteristic diameter is larger, and ascent rate is larger.
Air bubble coagulated particles (or oil droplet) in water combines the surface tension depended between bubble and coagulated particles.And the size of surface tension T is proportional to the length L of specific surface layer, that is:
Formula four, T=α L
In formula four: α: coefficient of surface tension, L: upper layer length;
Upper layer length L is larger as can be seen from the above equation, and surface tension is larger, then bubble absorption is more in coagulated particles (or oil droplet) appearance, then ρ
waddingless, then ascent rate is larger.
Air-float separator utilizes and reduces bubble diameter, then the collision probability of bubble and floccules (or oil droplet) is larger, in conjunction with bubble more, thus cause the ascent rate of floccules (or oil droplet) larger, thus solid-liquid separation or oily water separation more thorough.
4), walnut shell filter: the sewage entered by coarse filtration tank water-in backwash in tank body under the pusher stirrer effect of eddy flow, the oil droplet and suspended substance that are greater than walnut shell filtering material gap in sewage are trapped within walnut shell filtering material top layer, be less than the oil droplet in walnut shell filtering material gap and suspended substance when by walnut shell filtering material layer, be deposited in filter material surface by action of gravity; Or when streamline is particle radius apart from filtrate distance, adsorbed by filtrate under van der Waals interaction; Grain is surperficial and adsorbed by walnut shell filtering material to walnut shell filtering material through the diffusion mobility under pedesis effect of the oil droplet of < 1um;
5), secondary membrane: adopt membrane filtration technique to do last treatment process, remove residue greasy dirt;
6), water outlet: the sewage meeting emission standard after process is directly discharged or enters clean water basin; Complete.
Claims (5)
1. a high-efficiency oilfield reinjected water treatment system, it is characterized in that, comprise the coalescer be communicated with water intaking valve, described coalescer connects swirler, air floatation machine, coarse filtration tank and film tank successively, and wherein said coalescer, swirler, air floatation machine, coarse filtration tank are all communicated with contaminated-oil basin with film tank;
Described coalescer has water-in, oil outlet, water outlet and small space betddn slanting board sedimentation, described water-in is located at the below of described small space betddn slanting board sedimentation, and described oil outlet and described water outlet to be located at above described small space betddn slanting board sedimentation and to be laid respectively at the both sides of described small space betddn slanting board sedimentation;
Described swirler is tapered, inside is provided with cyclone pipe and the current stabilization cover of conical helical pattern, described cyclone pipe linearly type is arranged, is comprised import, eddy flow chamber, contraction chamber, tail cone, tail pipe, underflow opening and overflow port, described current stabilization covers between described contraction chamber and described tail cone, described current stabilization cover comprises oil extraction section and inlet segment, described oil extraction section is located in described inlet segment and the end face of described oil extraction section is concordant with the end face of described inlet segment, the center of described oil extraction section is provided with current stabilization cover oil discharge outlet, and described inlet segment is provided with tangential water inlet;
Described air floatation machine comprises the float switch of air floatation machine body, air floatation machine water-in, air floatation machine water outlet, air floatation machine oil outlet, air dissolved pump, pressure-pot, two groups of submersible sewage pumps and some different heights, described pressure-pot one end connects on the described air floatation machine body of described air floatation machine water-in side, the other end connects described air dissolved pump, the other end of described air dissolved pump connects on the described air floatation machine body of described air floatation machine water outlet side, and described submersible sewage pump is connected in parallel and is communicated with described coarse filtration tank;
Described coarse filtration tank comprises coarse filtration tank body, eddy flow pusher stirrer, walnut shell filtering material, coarse filtration tank water-in, coarse filtration tank water outlet and coarse filtration tank oil outlet, the top of described coarse filtration tank body is located at by the pusher stirrer of described eddy flow, and the height of described coarse filtration tank water-in is lower than the height of described walnut shell filtering material;
Filter core is provided with in described film tank.
2. a kind of high-efficiency oilfield reinjected water treatment system according to claim 1, it is characterized in that, described small space betddn slanting board sedimentation comprises framework and some wavy screen plates, and described framework is provided with some slots, and described screen plate is located in described framework by described slot is oblique.
3. a kind of high-efficiency oilfield reinjected water treatment system according to claim 2, it is characterized in that, the spacing between described screen plate is 28mm-32mm.
4. a kind of high-efficiency oilfield reinjected water treatment system according to claim 1, is characterized in that, the bubble diameter that described air floatation machine produces is 20um-50um.
5. a kind of high-efficiency oilfield reinjected water treatment system according to claim 1, is characterized in that, described filter core is the highly purified titanium valve of 99.6%, obtains through high temperature sintering.
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|---|---|---|---|
| CN201420434946.4U CN204058090U (en) | 2014-08-01 | 2014-08-01 | A kind of high-efficiency oilfield reinjected water treatment system |
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| CN201420434946.4U CN204058090U (en) | 2014-08-01 | 2014-08-01 | A kind of high-efficiency oilfield reinjected water treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118063053A (en) * | 2024-04-24 | 2024-05-24 | 通化宏信研磨材有限责任公司 | Wastewater recycling treatment device and treatment method for silicon carbide micro powder |
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2014
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118063053A (en) * | 2024-04-24 | 2024-05-24 | 通化宏信研磨材有限责任公司 | Wastewater recycling treatment device and treatment method for silicon carbide micro powder |
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| GR01 | Patent grant | ||
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Granted publication date: 20141231 Termination date: 20180801 |
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