CN102198984A - Multiphase separation method and system for processing oily waste water - Google Patents

Multiphase separation method and system for processing oily waste water Download PDF

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Publication number
CN102198984A
CN102198984A CN2010101350057A CN201010135005A CN102198984A CN 102198984 A CN102198984 A CN 102198984A CN 2010101350057 A CN2010101350057 A CN 2010101350057A CN 201010135005 A CN201010135005 A CN 201010135005A CN 102198984 A CN102198984 A CN 102198984A
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China
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water
waste
oily
air
whirl cylinder
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CN2010101350057A
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Chinese (zh)
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陈家庆
韩旭
王莹莹
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北京石油化工学院
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Priority to CN2010101350057A priority Critical patent/CN102198984A/en
Publication of CN102198984A publication Critical patent/CN102198984A/en

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Abstract

The invention discloses a multiphase separation method and a system for processing oily waste water. The multiphase separation system comprises a cyclone-air flotation integrated separator, a multiphase pump for mixing gas with liquid arranged at an oily waste water inlet, a multiphase pump for mixing pure water for circulation and backflow with circulation gas and the like. The oily waste water enters from the bottom of a tank body into a cyclone to perform a hydrocyclone separation, tiny bubbles in the waste water are released to perform a first air floatation, light substances such as bubbles with oil particles are moved to the top of the cone-shape cyclone, heavy substances such as solid particles are moved to the bottom of the cone-shape cyclone, the waste water runs over the top of the cone-shape cyclone to enter a secondary air floatation zone, the pure water for circulation and backflow and circulation gas are shear mixed in the multiphase pump, then the oily waste water is subject to a secondary air floatation by using gas-liquid mixture from water distributing apertures on an annular water-locator, and the waste water is subject to a hydrocyclone separation and two air floatation separations in a separator. The invention has the advantages of simple and compact structure, high work efficiency, and is used for the purifying process of oily waste water containing tiny dispersed oil particles.

Description

Oily(waste)water is handled with multi-phase separation method and system

Technical field

The present invention relates to the separation method and the equipment of heterogeneous blending agents such as a kind of oil, gas, water, suspended solid or even sand grains, be specially adapted to contain the oily(waste)water purifying treatment of small dispersion elaioleucite.

Background technology

Oily(waste)water in Petroleum and Petrochemical Industry, machinofacture, urban life is medium often runs into, and removes the primary Processing tasks that oil content wherein faces often.The method of oily water separation is a lot, and method commonly used has settling methods, centrifugal settling method, air supporting method, cohesion filtration method, absorption method, membrane separation process etc., various treatment processs all have separately relative merits and the specific scope of application.Wherein air supporting method technical maturity, with low cost, treatment capacity is big, can effectively remove particle diameter in the waste water at the oil in water emulsion of 0.1-10 μ m be partly dissolved the contact scar component, therefore be widely used in the processing of waste water such as oil production, petrochemical complex, machinofacture and food oil production.Its main drawback is that oil slick is difficult, and hydraulic detention time is longer; Must build large-scale airfloat equipment when treatment capacity is big, floor space is big, the investment cost height.Outside the degasification float glass process, hydrocyclone based on centrifugal separation technique has obtained application more and more widely in oily(waste)water is handled since the nineties in 20th century, this method utilization oil, water biphase density difference produce centrifugal force and implement to be separated in the eddy flow cavity, have advantages such as compact construction, floor space is little, running maintenance is simple.But the oil bead diameter scope that this method can be removed is not less than 20 μ m, and the monomeric processing power of hydrocyclone is very limited simultaneously, need be when treatment capacity is big with many monomer parallel runnings, and the processing and manufacturing difficulty is bigger, and is not easy to maintenance.

In order to overcome the shortcoming of traditional air supporting and eddy flow treatment technology, further strengthen the oil-water separation of air supporting method, many in recent years researchists or even relevant water treating equipment manufacturer have all proposed new processing method that the dissolved air flotation technology is combined with centrifugal separation technique, and have obtained some substantial achievements in research.Especially what deserves to be mentioned is; prevent the signing of " the OSPAR pact " of pollution of the sea along with European Union; Europe marine oil big country's environment protection and administrative authority have proposed the processing target of oil extraction waste water zero release; force relevant oil company and device fabrication producer to develop novel oil extraction waste water treatment technology; there is 5-6 family's esbablished corporation successively to release compact type air-floating apparatus (Compact Flotation Unit based on the combination of air supporting and low strength centrifuge field; CFU), and in handle at scene, oil field especially marine petroleum development oil extraction waste water obtained good effect.

From the angle of intellectual property protection, in the U.S. Pat 7144503 of Norway M-I Epcon company application, set forth a kind of degassing dissolved air flotation device, there is a vertical cylinder a jar internal upper part center, is fixed with spirrillum inlet guide card on the tank body upper inside wall.Oily(waste)water produces swirling motion after entering in the jar via the tank body upper tangential under the guiding of spiral guide sheet, bubble and elaioleucite are depressed into taper eddy flow barrel under cyclonic action, and the two rises to tank deck after adhering to, and discharges by the oil gas vent of tank deck.According to the patentee, this device is better to the treatment effect of oily(waste)water, and cost and maintenance cost are very low, is applicable to that relatively the storage of offshore production platform or Floating Production unloads oil tanker (FPS0) and wait the relatively stricter occasion use of space requirement.But from the appended structure iron of this patent, rise to some problems that exist that efflux of the oil of jar inner top and bubble scum silica frost.In addition, offshore production platform or FPS0 can be in vibrating state often because of the effect of ripple, wave, stream, this moment, a jar inner liquid level was difficult to keep stable, thereby caused the water content in the outer gentle bubble scum silica frost of oil extraction of this device too high, thereby had had a strong impact on separating effect.

In the U.S. Pat 7157007 of U.S. Natco group application, a kind of oil, gas, water three-phase separating device have been set forth; this device is a vertical-type air-flotation separating tank; mainly be divided into upper, middle and lower-ranking, utilized centrifugation, coarse and injection dissolved air flotation technology respectively.The central position that is positioned at tank body top is equipped with an inner core that diameter is less, and oily(waste)water enters into inner core from tangential inlet and produces eddy flow, carries out oily water separation in inner core, and oil phase directly enters the oil skimming bucket, is directly discharged by oil skimming bucket bottom.Flow from top to bottom from the effusive water of interior tube bottom, when passing through coalescent layer that is positioned at the tank body middle part, the dispersive elaioleucite is grown up in this gathering.Part macrobead elaioleucite can be under buoyancy, overcome self gravitation and the main body following upwards buoyance lift that begins to flowing mutually, from and removed a part of oil.At jar lower central place an injector is installed, the gas of utilization jar inner top and backflow are purified waste water and after the shear-mixed, produce microbubble in injectors, the oily(waste)water that gets off from coalescent laminar flow is carried out air supporting handle.But because removing, oil gas adopts the mode that freely effluxes from the oil skimming bucket, so can't control tank level effectively; The periodic cleaning of simultaneously coalescent layer bothers very much, and the internal structure of whole plant is often complicated, and the cost of processing and manufacturing is higher.

The domestic structure conception that also has some researchists also to propose the compact efficient air-floating apparatus.For example, set forth a kind of efficient air-floating apparatus among the patent CN 2401273Y that the prosperous people of grade of the Wang Xiao of Xi'an University of Architecture and Technology applies for, mainly formed by air flotation tank, efficient molten gas force (forcing) pump, mixing zone, clear water zone and Ji Zhaqu.Air flotation tank is made of inside and outside two cylindrical shells with shape, is clear water zone between urceolus and the inner core, and inner core is as air flotation zone; The inner core lower end is connected with the awl cap of water distribution uniformity.Former water and dissolved air water enter from air flotation tank bottom, mix and enter air flotation zone in the inner core behind awl cap water distribution uniformity, and light suspended substance moves up under buoyancy attached on the microbubble in the water, arrive the water surface after, form scum silica frost.Scum silica frost then enters the Ji Zhaqu of upper end, discharges tank body by pipeline; Water after the processing enters clear water zone by the inner core top, and the water that discharges bubble enters urceolus by inner core barrel top.Though this patent proposes to utilize efficient air dissolved pump to replace dissolving and water sprayer, thereby make whole process flow simplify, but because the radial space moment increase when entering tank body of former water and dissolved air water, flow pressure reduces, cause the degree of mixing of former water and dissolved air water to reduce, influence treatment effect.

In order further to improve the processing efficiency of gas floatation separation device, domestic researchist is also attempting utilizing centrifuge field to strengthen the air supporting process, but the present cyclone air-flotation combined treatment technology of paying close attention to of most researchists still is confined to liquid-liquid separation is combined with the dissolved air flotation technology with the hydrocyclone monomer, not only processing power is limited, and is in the laboratory exploratory stage.A kind of oily water separation waterpower cyclone air-flotation device has been proposed among the patent CN 2459311Y of people such as the Kang Yong of chemical engineering institute of University Of Tianjin application, form by cylindrical shell, removable underflow opening and aeration head, cylindrical shell is made of cylinder and two-stage circular cone, and top is provided with upflow tube, discharges for the lightweight oil phase; The cylindrical shell cylindrical side is provided with feed-pipe, and cylindrical shell lower end and removable underflow opening join, and supplies water and the discharge of solid suspension thing.Removable underflow opening links to each other with the cylindrical shell lower end by screw thread, is provided with a threaded ferrule in the underflow opening, is connected by four gussets with underflow opening and fixing.Threaded ferrule is used for fixing aeration head and controls the depth of penetration of aeration head at underflow opening, the outside, bottom of aeration head cylinder part has osculum, after pressurized air etc. are selected with the form of micro bubble by the aeration head surface micropore, disperse is in along cylinder inboard wall rotation and oil in water emulsion down, small-amount free oil and disperse in the wet goods main body stream, and self is surperficial and discharge from upflow tube thereby hydrophobic oil phase (comprising oil in water emulsion, small-amount free oil and dispersed oil) in the main body stream trapped.But deficiencies such as this scheme exists, and processing power is limited, aeration head is blocked easily.A kind of water treatment separator device is disclosed among the patent CN 101182080A of people's applications such as the king of Jiangsu Polytechnic University establishes, wherein related to the cyclone air-flotation separator, described cyclone air-flotation separator surface has slag-drip opening, the bottom is arranged to cone structure and is outwards had sewage draining exit at cone structure, had the screw-in mouth in the junction of air supporting tube and blowdown cone, work screwing in a mouthful connection injector, the injector the other end is communicated with the sump pump that is positioned at ingress; Sewage mixes gas by pump through injector, for the cyclone air-flotation separator provides source of the gas.The sewage that enters the air supporting tube forms the jet be mutually 120 °, forms the circle of rotation and produces the air supporting cyclonic effect.Under the helical flow centrifugal action, solid impurity is discharged by sewage draining exit along wall, and the rotation air supporting eddy flow that has a large amount of microbubbles takes to liquid level such as greasy dirt, is discharged by slag-drip opening.But this device only can be used for the pre-separation of solid impurity and liquid phase, can not realize the pre-separation of two-phase materials such as oil, water; Simultaneously, conventional air supporting injector is relatively poor for the adaptive faculty that contains a large amount of solid impurity mixed flows, is difficult to long-time steady operation.

In the patent CN201157703 that the applicant applies for before this, set forth a kind of compact cyclone air-flotation separation system, its main body is vertical compact cyclone air-flotation Composite Can, there is an inner core internal upper part center in the Composite Can, and inner core top has recessed ball coronal overflow weir; The Composite Can upper inside wall is equipped with spiral guide sheet upwards from tangential ingress; The lower central position is equipped with an air supporting injector in the Composite Can.Gas-liquid mixing pump is imported Composite Can with the uniform mixing liquid of oily(waste)water-microbubble by the tangential inlet that is arranged in jar top, in Composite Can, form eddy flow via the inlet spiral guide sheet, meanwhile microbubble discharges in the mixed solution, has formed cyclonic separation and flotation separation zone between jar inwall and inner core; Part purify recirculation water under the effect of fresh water pump by the air supporting sprayer pumps from top gas spatial recycle gas, thereby produce micro bubble, with reverse contact of disperse phase elaioleucite in the waste water that flows from top to bottom, and carry elaioleucite and float.Combination tank level top accumulative water solution of oil and bubble scum silica frost finally are pooled in the inner core by zigzag overflow weir, continuously are eliminated through oil export, and heavier water and solid phase are last is discharged by the water outlet and the greasy filth outlet of pot bottom respectively.It is relatively poor that this structure is not only rocked the adaptability of operating mode to ocean environment ripple, wave, equipment that stream causes, and only depend on an air supporting injector that is positioned at the tank body lower central to produce micro bubble, number of bubbles is limited, bubble size is also bigger, be difficult to guarantee uniform distribution at whole micro bubble in the radial direction, there is the air supporting dead band unavoidably, thereby influences decontamination effect improving.

In view of the foregoing, be necessary that further developing novel oily(waste)water handles the deficiency that overcomes above-mentioned oily-water seperating equipment with the cyclone air-flotation separation system.

Summary of the invention

According to background technology, the objective of the invention is to overcome conventional hydrocyclone is difficult to oil or fat particles is effectively separated shortcomings such as, residence time length big with traditional airfloat equipment floor space, complex structure, a kind of pneumatically supported theory of turbulent flow that makes full use of is proposed, eddy flow, two kinds of oily water separation monotechnicss of air supporting are combined, make the dispersion elaioleucite in the water can obtain high efficiency separation, compact equipment, field use reach the New-type Swirl Flow air-float integral multi-phase separation method and the system of initial gross separation processing even direct emission standard.

To achieve these goals, the present invention is achieved through the following technical solutions:

A kind of oily(waste)water is handled and is used multi-phase separation system, mainly by the integrated separator of cyclone air-flotation (10), oily(waste)water ingress gas-liquid mixed multiphase flow pump (64), the part pump around circuit is purified waste water and is mixed with multiphase flow pump (42) and necessary pipeline and valve composition with recycle gas, wherein: the integrated separator of cyclone air-flotation (10) fixes on the ground by three supporting legs (55), its top is provided with oval upper cover (48), the middle part is provided with circular cylindrical shell (49), the bottom is provided with oval lower cover (53), be provided with arc oil pooling hood (43) in it, taper whirl cylinder (11), anti-whirlpool airway (37), annular water distributor (40) and ring baffle (35), arc oil pooling hood (43) is positioned at separator top and annular water distributor (40) and ring baffle (35) are positioned at the separator bottom, and whole heterogeneous separated region is divided into cyclonic separation and first air flotation zone (12), secondary air flotation zone (13), scum silica frost is collected gentle body accumulation region (14).

Under the effect of multiphase flow pump (64), the oily(waste)water that carries a large amount of microbubbles tangentially enters in the taper whirl cylinder (11) after water inlet pipe (16) passes circular cylindrical shell (49), rotation is risen and is produced the rotating centrifugal field of force under the drainage of spiral guide sheet (39), microbubble in the oily(waste)water is released and adheres to the disperse phase elaioleucite, there is the trend of migrating to anti-whirlpool airway (37) on every side in bubble-light constituents such as elaioleucite adherend because of suffered centrifugal force is less, under the compound action of rotation rising main body movement tendency, most gas and bubble-elaioleucite adherend finally arrives and accumulates in the zone at taper whirl cylinder (11) top, the gas of small part and bubble-elaioleucite adherend enters in it by the micropore on the anti-whirlpool airway (37), and final the rising accumulates in arc oil pooling hood (43) below; The bigger solid particulate of density glides along inner-wall surface then and accumulates in the inverted cone segment of bottom, and regularly discharge by greasy filth discharge outlet (26) because of suffered centrifugal force reaches the inwall of taper whirl cylinder (11) greatly; Overflow from taper whirl cylinder (11) through the oily(waste)water of initial gross separation and to enter secondary air flotation zone (13) and flow from top to bottom, purifying waste water of part pump around circuit imported the annular space of taper whirl cylinder (11) outside postpartum through multiphase flow pump (42) shear-mixed with circulation gas, under the combined action of annular water distributor (40) and ring baffle (35), produce a large amount of equally distributed micro bubbles, micro bubble contacts with top-down oily(waste)water is reverse in moving process from bottom to top, after adhering to, mark phase elaioleucite wherein and micro bubble rise to arc oil pooling hood (43) below, a large amount of water solution of oil of institute's accumulative and bubble scum silica frost finally enter scum silica frost by arc oil pooling hood (43) top outlet (44) and collect gentle body accumulation region (13), and are discharged by oil outlet pipe (22); Do not discharge by the clear water output (30) of separator bottom as purifying waste water of pump around circuit.

Owing to adopted technique scheme, the present invention to have following advantage and effect:

1. present device compact appearance, simple, the structure formation exquisiteness, floor space is little, is applicable to the heterogeneous separation of oil, gas, water, suspended solid or even silt particle, is specially adapted to contain the purifying treatment of small dispersion elaioleucite oily(waste)water.

Certain applications of the present invention the pneumatically supported design theory of turbulent flow, can improve turndown ratio, stronger to the adaptability of handling flow, oleaginousness and air content fluctuation.

3. the present invention can be used for the oil-contained waste water treatment system that has had is carried out extending capacity reformation, need not change existing installation and pipeline, and the input that reduces cost has accomplished to handle the clear Water reuse in back, economizes on resources.

4. applied range of the present invention, both having can be applicable to the oil extraction waste water processing in field, marine oil industry upstream and the refinery water of petrochemical industry handles, also can be applicable to simultaneously the processing of other industry oily(waste)water, processing as cold rolling oily(waste)water of steel industry and degreasing fluid, the emission treatment of oil in water emulsions such as machining industry grinding, cutting, cooling, surface treatment industry degreasing wastewater treatment.

Description of drawings

Fig. 1 is that overall system of the present invention is arranged synoptic diagram;

Fig. 2 is circular cylindrical shell of the present invention and internal structure cross-sectional schematic thereof;

Fig. 3 for the A-A of Fig. 2 of the present invention to cross-sectional schematic;

Fig. 4 for the B-B of Fig. 2 of the present invention to cross-sectional schematic;

Fig. 5 for the C-C of Fig. 2 of the present invention to cross-sectional schematic;

Fig. 6 is the structural representation of coalescent layer in the middle of the circular cylindrical shell band of the present invention.

Embodiment

By Fig. 1 to Fig. 6 illustrate, a kind of oily(waste)water is handled and is used multi-phase separation system, mainly by the integrated separator 10 of cyclone air-flotation, oily(waste)water ingress gas-liquid mixed multiphase flow pump 64, the part pump around circuit is purified waste water and is mixed with multiphase flow pump 42 and necessary pipeline and valve composition with recycle gas, wherein: the integrated separator 10 of cyclone air-flotation fixes on the ground by three supporting legs 55, its top is provided with oval upper cover 48, the middle part is provided with circular cylindrical shell 49, the bottom is provided with oval lower cover 53, be provided with arc oil pooling hood 43 in it, taper whirl cylinder 11, anti-whirlpool airway 37, annular water distributor 40 and ring baffle 35, arc oil pooling hood 43 is positioned at separator top and annular water distributor 40 and ring baffle 35 are positioned at the separator bottom, and whole heterogeneous separated region is divided into cyclonic separation and first air flotation zone 12, secondary air flotation zone 13, scum silica frost is collected gentle body accumulation region 14.

Taper whirl cylinder 11 is divided into little positive cone section 111, big positive cone section 112 and inverted cone segment 113, the straight neck of weak point of inverted cone segment 113 bottoms is fixedlyed connected with separator lower cover 53, the inwall of big positive cone section 112 is equipped with from bottom to top, the spiral guide sheet 39 that rotation is risen, the anti-whirlpool airway 37 that is positioned on taper whirl cylinder 11 central axis is fixing by taper whirl cylinder 11 bottoms and vertical each four radial support rib 38, the even tube wall of anti-whirlpool airway 37 offers several micropores 371, its top exceeds taper whirl cylinder 11 about 10cm, the height of taper whirl cylinder 11 is 3/5~3/4 of a separator height overall, the maximum diameter ratio of three awl sections is 0.6: 1: 1, and taper whirl cylinder maximum diameter and reactor diameter ratio are controlled at 1/3~1/2.

Secondary air flotation zone 13 bottoms are provided with the cross section and are circle piped annular water distributor 40, and evenly offer downward water distributing pore 401 at its horizontal circumferential direction, circumferentially be spaced apart 10 °~30 °, annular water distributor 40 lies in a horizontal plane on four radial support auricles 41 that are fixed in circular cylindrical shell 49 inwalls, radial support auricle 41 ends abut on the barrel 101 of taper whirl cylinder 11, and the bottom of radial support auricle 41 is fixed with the ring baffle 35 that is arranged in parallel with annular water distributor 40.

Arc oil pooling hood 43 tops are that scum silica frost is collected gentle body accumulation region 14, the round shape outlet 44 of arc oil pooling hood 43 intermediate projections is for bubble--the elaioleucite adherend rises to the passage that scum silica frost is collected gentle body accumulation region 14 from air flotation zone, the radius of arc oil pooling hood 43 main body circular arc portions is generally greater than the maximum curvature radius of oval upper cover 48, arc oil pooling hood 43 excircle ring-type straight portion, be evenly distributed with 4 circular holes 431, and be spirally connected with the inwall of circular cylindrical shell 49, on circular cylindrical shell 49 tops oil discharge outlet 23 is set.

Oval upper cover 48 is spirally connected by bolt 50 and circular cylindrical shell 49, and hanger 51 is set thereon, and exhaust passage 36 and production well 34, oval lower cover 53 is spirally connected by bolt 54 and circular cylindrical shell 49, clear water output 30 is set, standby clear water output 65 and greasy filth discharge outlet 26 on it.

In the integrated multi-phase separation system of the cyclone air-flotation shown in Fig. 1, the oily waste water water and air is drawn in the multiphase flow pump 64 simultaneously, through the vigorous stirring of impeller in the pump, the uniform mixing liquid that shear-mixed becomes oily(waste)water-microbubble, increased the adhesion chance of dispersed oil and micro-bubble.The oily(waste)water solution-air mixed solution that carries a large amount of micro bubbles passes separator circular cylindrical shell 49 backs with certain speed and pressure by water inlet pipe 16 and enters taper whirl cylinder 11 big positive cone sections 112 bottoms by tangential water inlet 17, and this entry position can make elaioleucite and microbubble obtain the longest duration of contact.Meanwhile, the rotation under the constraint of the guiding of spiral guide sheet 39 and taper whirl cylinder 11 inwalls of the gas and liquid mixture with certain pressure is risen, thereby forms the eddy flow centrifuge field in taper whirl cylinder 11.In this process, microbubble in the oily(waste)water is released and adheres to the disperse phase elaioleucite, bubble-light constituents such as elaioleucite adherend, the trend that has migration around anti-whirlpool airway 37 because of suffered centrifugal force is less, under the compound action of spiral rising main body movement tendency, most gas and bubble-elaioleucite adherend finally arrives and accumulates in the zone at taper whirl cylinder 11 tops, the gas of small part and bubble-elaioleucite adherend enters in it by the micropore on the anti-whirlpool airway 37, and final the rising accumulates in arc oil pooling hood 43 belows; The bigger solid particulate of density glides along barrel then and accumulates in the inverted cone segment 113 of bottom, and regularly discharge by greasy filth discharge outlet 26 because of suffered centrifugal force reaches the barrel of taper whirl cylinder 11 greatly.

Adopt the design of third hand tap sections by the taper whirl cylinder shown in Fig. 2, Fig. 3 11: the below is an inverted cone segment 113, be used for collecting solid particulate and other suspended substance of waste water, the back taper bottom links to each other with greasy filth discharge outlet 26, and the silt particle of collection is regularly from this outlet drain separator; The big positive cone section 112 in middle part has comprised bottom tangential entry 17 and spiral guide sheet 39 as main centrifugation and first air flotation zone 12; The tapering minimum of the little positive cone section 111 in top, do not design spiral guide sheet, this awl section is a zone of transition, and bubble-elaioleucite adherend of avoiding the high strength eddy flow will be gathered in this is sheared and disperseed, and make oily(waste)water enter secondary air flotation zone 13, improve air flotation effect with stable status comparatively.Taper whirl cylinder 11 is fixedlyed connected with the separator lower cover by the straight neck of weak point of bottom, and abut in taper whirl cylinder outer wall by the end of four radial support auricles 41 and assist to set upright, the equipment that prevents is in service, and the stress that causes short straight neck of taper whirl cylinder and separator lower cover fixed connection place is excessive to cause fracture because of rock in the external world.The height of taper whirl cylinder 11 is that the maximum diameter ratio of 3/5~3/4, three awl sections of separator height overall is 0.6: 1: 1, and the maximum diameter of taper whirl cylinder 11 and reactor diameter ratio are controlled at 1/3~1/2.

Show the mounting arrangements mode of annular water distributor 40 by Fig. 2, Fig. 4.Oily(waste)water is through after cyclonic separation and the first dissolved air flotation process, and most of waste water is overflowed by the little positive cone section of taper whirl cylinder 111 tops, moves downward while rotating, and centrifugal force weakens gradually, falls into secondary air flotation zone 13 at last and carries out secondary air supporting.Purifying waste water of part pump around circuit is positioned at the annular water distributor 40 of taper whirl cylinder 11 annular space bottoms through multiphase flow pump 42 shear-mixed inputs in postpartum with circulation gas, the cross section of annular water distributor 40 is the pipe shape, and evenly offer downward water distributing pore 401 at its horizontal circumferential direction, do not work or treatment capacity is stopped up water distributing pore 401 when fluctuation takes place at separator with solid suspension thing in the oily(waste)water that prevents to enter secondary air flotation zone 13, the aperture of water distributing pore 401 is Φ 8~15mm, circumferentially is spaced apart 10 °~30 °.Annular water distributor 40 lies in a horizontal plane on four radial support auricles 41 that are fixed on circular cylindrical shell 49 inwalls, and the outer wall that end abuts in taper whirl cylinder 11 plays a supportive role.The bottom of radial support auricle 41 is fixed with the ring baffle 35 that is arranged in parallel with annular water distributor 40.The solution-air mixed solution that comes out from water distributing pore 401 produces a large amount of micro bubbles under the combined action of annular water distributor 40 and ring baffle 35, and it is mobile to everywhere to be cross flow shape along continuous straight runs, thereby makes whole secondary air supporting zone can distribute microbubble uniformly and the air supporting dead band not occur.The oily(waste)water that overflows in the taper whirl cylinder 11 flows from top to bottom, microbubble rises from bottom to top, adverse current can make the elaioleucite in the waste water fully be contacted with microbubble, and rising along with bubble, bubble is grown up gradually because pressure constantly descends, more elaioleucite is adhered to micro bubble, form bubble-elaioleucite adherend.Bubble-elaioleucite adherend constantly rises in secondary air flotation zone 13, also accumulates in arc oil pooling hood 43 bottoms.

Show the part-structure details of arc oil pooling hood 43 by Fig. 5.Arc oil pooling hood 43 tops are that scum silica frost is collected gentle body accumulation region 14, and the round shape of arc oil pooling hood 43 intermediate projections outlet 44 rises to the passage that scum silica frost is collected gentle body accumulation region 14 for bubble-elaioleucite adherend from air flotation zone.The radius of arc oil pooling hood 43 main body circular arc portions is generally greater than the maximum curvature radius of oval upper cover 48, at arc oil pooling hood 43 excircles is the ring-type flat region, be evenly distributed with 4 circular holes on it, adopt 4 screw 46 correspondences to be fixed on four radial support auricles 47 with threaded hole of inner tank wall, thereby oil pooling hood is fixed in the separator, and is convenient to oil pooling hood more or less freely dismounting and maintenance from separator.Be accompanied by twice air supporting, the gas, the bubble-elaioleucite adherend that accumulate under the arc oil pooling hood are on the increase, and enter scum silica frost by arc oil pooling hood 43 tops outlet 44 at last and collect gentle body accumulation region 14.On separator circular cylindrical shell 49, be slightly higher than arc oil pooling hood 43 excircle flat region places, offer horizontal oil outlet pipe 22.The gas part at separator top enters the circulation gas flow process by 34, and another part is by 36 drain separators.Do not discharge (being provided with standby clear water output 65 in addition) by the clear water output 30 of separator bottom as purifying waste water of pump around circuit.Even the design of arc oil pooling hood 43 and outlet 44 can guarantee that separator is in the more abominable operating environment that certain inclination angle or swing are arranged, waste water can overflow enter scum silica frost yet and collects gentle body accumulation region and influence oil-water separation.

The anti-whirlpool airway 37 that anti-whirlpool airway 37 is positioned on taper whirl cylinder 11 central axis is fixing by taper whirl cylinder 11 bottoms and vertical each four radial support rib 38.Anti-airway 37 tops, whirlpool exceed taper whirl cylinder 11 tops 5~10cm, under the upwards through arc oil pooling hood 43, except that above-mentioned anti-whirlpool effect, should have micropore 371 on the middle air defence whirlpool airway 37, assemble nigh a part of bubble and bubble-elaioleucite adherend and can enter airway lumen by micropore, move upward and vent gas body and adherend, to prevent at taper whirl cylinder 11 centers generation intensive secondary eddy current.

The gas that air supporting is used can be air, also can be nitrogen, even can be associated gas, does not have oxidisability but preferably adopt, and the associated gas that obtains easily.

Fig. 6 shows another embodiment of the present invention, promptly can set up oil or fat particles coarse coalescent pack layer 66 at secondary air flotation zone 13 middle parts.The oily(waste)water that is overflowed by the little positive cone section of taper whirl cylinder 111 tops is through this packing layer the time, and the elaioleucite in the oily(waste)water can coalescently be grown up, thereby improves separation efficiency.The coalescent pack layer generally adopts the lipophilic-hydrophobic property material, and its thickness generally is not less than 100mm.Circular cylindrical shell 49 corresponding positions are provided with hand hole 67, are used to load and unload filler.

The integrated multi-phase separation system of cyclone air-flotation of the present invention, can take placed in-line mode of operation according to different performance requirements such as working flows, be the water inlet of the water outlet of first step separator as second stage separator, the oil that oil outlet is discharged is pooled in the same pipeline, and this mode of operation can improve the separation efficiency of the integrated multi-phase separation system of cyclone air-flotation; Perhaps adopt the mode of operation of 2 integrated multi-phase separation system parallel connections of cyclone air-flotation, the two independently carries out the purifying treatment of oily(waste)water respectively, the water that oil that oil outlet is discharged and water outlet are discharged is pooled to respectively in the same pipeline, and this mode of operation can improve the processing power of the integrated multi-phase separation system of cyclone air-flotation.

In sum, the oily(waste)water that contains a large amount of microbubbles enters taper whirl cylinder 11 from the tangential inlet 17 of tank body bottom, form eddy flow at taper whirl cylinder 11, finish the cyclonic separation process, microbubble release is carried out first air supporting to oily(waste)water in the oily(waste)water simultaneously, the light matter matter such as bubble that are stained with elaioleucite move to taper whirl cylinder top, solid phase particles etc. move to taper whirl cylinder bottom than heavy substance, oily(waste)water enters secondary air flotation zone 13 after overflowing from taper whirl cylinder top, a part is used for the water purification of pump around circuit and circulation gas in multiphase flow pump after the shear-mixed, the solution-air mixed solution that sends by water distributing pore on the ring-type water distributor carries out secondary air supporting processing to oily(waste)water, oily(waste)water is equivalent to carry out a cyclonic separation and twice dissolved air flotation in separator, therefore can reach satisfied treatment effect.

Claims (9)

1. an oily(waste)water is handled and is used multi-phase separation system, mainly by the integrated separator of cyclone air-flotation (10), oily(waste)water ingress gas-liquid mixed multiphase flow pump (64), the part pump around circuit is purified waste water and is mixed with multiphase flow pump (42) and necessary pipeline and valve composition with recycle gas, it is characterized in that: the integrated separator of cyclone air-flotation (10) fixes on the ground by three supporting legs (55), its top is provided with oval upper cover (48), the middle part is provided with circular cylindrical shell (49), the bottom is provided with oval lower cover (53), be provided with arc oil pooling hood (43) in it, taper whirl cylinder (11), anti-whirlpool airway (37), annular water distributor (40) and ring baffle (35), arc oil pooling hood (43) is positioned at separator top and annular water distributor (40) and ring baffle (35) are positioned at the separator bottom, and whole heterogeneous separated region is divided into cyclonic separation and first air flotation zone (12), secondary air flotation zone (13), scum silica frost is collected gentle body accumulation region (14).
2. oily(waste)water according to claim 1 is handled and is used multi-phase separation system, it is characterized in that: taper whirl cylinder (11) is divided into little positive cone section (111), big positive cone section (112) and inverted cone segment (113), the straight neck of weak point of inverted cone segment (113) bottom is fixedlyed connected with separator lower cover (53), the inwall of big positive cone section (112) is equipped with from bottom to top, the spiral guide sheet (39) that rotation is risen, the anti-whirlpool airway (37) that is positioned on taper whirl cylinder (11) central axis is fixing by taper whirl cylinder (11) bottom and vertical each four radial support rib (38), the even tube wall of anti-whirlpool airway (37) offers several micropores (371), its top exceeds the about 10cm of taper whirl cylinder (11), the height of taper whirl cylinder (11) is 3/5~3/4 of a separator height overall, the maximum diameter ratio of three awl sections is 0.6: 1: 1, and taper whirl cylinder maximum diameter and reactor diameter ratio are controlled at 1/3~1/2.
3. oily(waste)water according to claim 1 is handled and is used multi-phase separation system, it is characterized in that: secondary air flotation zone (13) bottom is provided with the cross section and is circle piped annular water distributor (40), and evenly offer downward water distributing pore (401) at its horizontal circumferential direction, circumferentially be spaced apart 10 °~30 °, annular water distributor (40) lies in a horizontal plane on four the radial support auricles (41) that are fixed in circular cylindrical shell (49) inwall, radial support auricle (41) end abuts on the barrel (101) of taper whirl cylinder (11), and the bottom of radial support auricle (41) is fixed with the ring baffle (35) that is arranged in parallel with annular water distributor (40).
4. oily(waste)water according to claim 1 is handled and is used multi-phase separation system, it is characterized in that: arc oil pooling hood (43) top is that scum silica frost is collected gentle body accumulation region (14), the round shape outlet (44) of arc oil pooling hood (43) intermediate projections is for bubble--the elaioleucite adherend rises to the passage that scum silica frost is collected gentle body accumulation region (14) from air flotation zone, the radius of arc oil pooling hood (43) main body circular arc portion is generally greater than the maximum curvature radius of oval upper cover (48), arc oil pooling hood (43) excircle ring-type straight portion, be evenly distributed with 4 circular holes (431), and be spirally connected with the inwall of circular cylindrical shell (49), on circular cylindrical shell (49) top oil discharge outlet (23) is set.
5. oily(waste)water according to claim 1 is handled and is used multi-phase separation system, it is characterized in that: oval upper cover (48) is spirally connected by bolt (50) and circular cylindrical shell (49), and hanger (51) is set thereon, exhaust passage (36) and production well (34), oval lower cover (53) is spirally connected by bolt (54) and circular cylindrical shell (49), clear water output (30) is set, standby clear water output (65) and greasy filth discharge outlet (26) on it.
6. oily(waste)water according to claim 1 is handled and is used multi-phase separation system; it is characterized in that: according to water quality situation and purification requirement; set up oil or fat particles coarse coalescent pack layer (66) at secondary air flotation zone (13) middle part; the thickness of coalescent pack layer generally is not less than 100mm, and in the corresponding position of circular cylindrical shell (49) hand hole (67) is set.
7. oily(waste)water is handled and is used multi-phase separation method, step is as follows: under the effect of multiphase flow pump (64), the oily(waste)water that carries a large amount of microbubbles tangentially enters in the taper whirl cylinder (11) after water inlet pipe (16) passes circular cylindrical shell (49), rotation is risen and is produced the rotating centrifugal field of force under the drainage of spiral guide sheet (39), microbubble in the oily(waste)water is released and adheres to the disperse phase elaioleucite, there is the trend of migrating to anti-whirlpool airway (37) on every side in bubble-light constituents such as elaioleucite adherend because of suffered centrifugal force is less, under the compound action of rotation rising main body movement tendency, most gas and bubble-elaioleucite adherend finally arrives and accumulates in the zone at taper whirl cylinder (11) top, the gas of small part and bubble-elaioleucite adherend enters in it by the micropore on the anti-whirlpool airway (37), and final the rising accumulates in arc oil pooling hood (43) below; The bigger solid particulate of density glides along inner-wall surface then and accumulates in the inverted cone segment of bottom, and regularly discharge by greasy filth discharge outlet (26) because of suffered centrifugal force reaches the inwall of taper whirl cylinder (11) greatly; Overflow from taper whirl cylinder (11) through the oily(waste)water of initial gross separation and to enter secondary air flotation zone (13) and flow from top to bottom, purifying waste water of part pump around circuit imported the annular space of taper whirl cylinder (11) outside postpartum through multiphase flow pump (42) shear-mixed with circulation gas, under the combined action of annular water distributor (40) and ring baffle (35), produce a large amount of equally distributed micro bubbles, micro bubble contacts with top-down oily(waste)water is reverse in moving process from bottom to top, after adhering to, disperse phase elaioleucite wherein and micro bubble rise to arc oil pooling hood (43) below, a large amount of water solution of oil of institute's accumulative and bubble scum silica frost finally enter scum silica frost by arc oil pooling hood (43) top outlet (44) and collect gentle body accumulation region (13), and are discharged by oil outlet pipe (22); Do not discharge by the clear water output (30) of separator bottom as purifying waste water of pump around circuit.
8. oily(waste)water according to claim 7 is handled and is used multi-phase separation method, it is characterized in that: the gases used shearing by multiphase flow pump (64), (42) respectively of twice air supporting process is dissolved in during oily(waste)water and pump around circuit purify waste water, and discharges with the micro bubble form in cyclonic separation and first air flotation zone (12), secondary air flotation zone (13).
9. oily(waste)water according to claim 7 is handled and is used multi-phase separation method, and it is characterized in that: air supporting can be air, nitrogen or associated gas with gas, preferably adopts the associated gas that does not have oxidisability and obtain easily.
CN2010101350057A 2010-03-26 2010-03-26 Multiphase separation method and system for processing oily waste water CN102198984A (en)

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CN102515308A (en) * 2011-12-23 2012-06-27 天津市茂联科技有限公司 Self-inflating micro-bubble oil remover and oil removing method
CN102515308B (en) * 2011-12-23 2013-06-19 天津市茂联科技有限公司 Self-inflating micro-bubble oil remover and oil removing method
CN102773154A (en) * 2012-08-13 2012-11-14 沈阳华大科技有限公司 Magnetic separation equipment with mixed disturbance of gas, solid and liquid
CN102874964B (en) * 2012-09-24 2013-12-11 森松(江苏)海油工程装备有限公司 Novel rotational-flow air-floatation sewage treatment device
CN102874964A (en) * 2012-09-24 2013-01-16 森松(江苏)海油工程装备有限公司 Novel rotational-flow air-floatation sewage treatment device
CN103193288A (en) * 2013-04-08 2013-07-10 中国海洋石油总公司 Micro-bubble generator for air floatation treatment of sewage
CN103351038A (en) * 2013-08-07 2013-10-16 华油惠博普科技股份有限公司 Gas-floatation rotational-flow coalescence composite type sewage oil-removing device
CN103936205B (en) * 2014-05-13 2015-06-10 大连交通大学 Emulsion recycling, purifying and regenerating equipment and method
CN103936205A (en) * 2014-05-13 2014-07-23 大连交通大学 Emulsion recycling, purifying and regenerating equipment and method
CN104562082B (en) * 2014-11-21 2017-05-10 大连鑫恒环保科技有限公司 Method for preparing copper-containing solution by dissolving waste copper
CN104562082A (en) * 2014-11-21 2015-04-29 大连鑫恒环保科技有限公司 Method for preparing copper-containing solution by dissolving waste copper
CN105174365A (en) * 2015-04-28 2015-12-23 中国海洋石油总公司 Oily sewage treatment system
CN105174365B (en) * 2015-04-28 2018-01-16 中国海洋石油总公司 A kind of oil-containing sewage treatment system
CN105668827A (en) * 2015-07-20 2016-06-15 中国海洋石油总公司 Two-stage treatment method for offshore platform production wastewater
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CN105621747A (en) * 2016-03-22 2016-06-01 常州大学 Coagulation and air floatation integrated oil field waste water deep treatment device
CN105621517A (en) * 2016-03-23 2016-06-01 北京石油化工学院 Device and method for oily sewage treatment based on single-tank double-stage rotational flow air floating device
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