CN103979637B - A kind of refining plant of oily(waste)water and separation method - Google Patents
A kind of refining plant of oily(waste)water and separation method Download PDFInfo
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- CN103979637B CN103979637B CN201410217739.8A CN201410217739A CN103979637B CN 103979637 B CN103979637 B CN 103979637B CN 201410217739 A CN201410217739 A CN 201410217739A CN 103979637 B CN103979637 B CN 103979637B
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Abstract
A kind of refining plant of oily(waste)water and separation method, device comprises: water inlet distribution device, post separator, floating oil collecting device, inflatable cyclone separator, at least one self-suction microbubble generator, at least one molten air elutriation goes out microvesicle generators, cylinder top is post separator, and bottom is built-in inflatable cyclone separator, and the two up/down perforation is connected; Molten air elutriation goes out the inflation point of microvesicle generators on cylinder top, and the inflation point of self-suction microbubble generator is in cylinder bottom.The emanate raw microvesicle of miscarriage and high pressure solution gas of negative pressure self-gravitation is utilized to reduce pressure to separate out and produce microvesicle two kinds of modes and inflate, cyclonic separation is coupled with dissolved air flotation, can effectively be separated fine fraction oil content in oily(waste)water, effective flotation granularity lower limit is little, disengaging time is short, running cost is low, solves oil in water emulsion in oily(waste)water and is separated difficult ground problem.
Description
Technical field
The present invention relates to a kind of oil-water separation purification device and separation method, particularly relate to a kind of oil-containing sewage purifying device containing oil in water emulsion and separation method.
Technical background
Oily(waste)water is the various lots of source of pollution produced in oil development utilization activity.Oily(waste)water is effectively processed, makes sewage qualified discharge, reclaim wherein oil product, not only protect environment, and create economic benefit, achieve the unification of environmental benefit and economic benefit.
In oily(waste)water, oil content is mainly composed with forms such as oil slick, dispersed oil, oil in water emulsion, dissolving oil He You – solidss and is existed in water body.Oily water separation complexity depends on the existence form of oil content in water, the fine dispersion oil existed with colloidal state in sewage and oil in water emulsion, particle diameter is less, adheres to impurity in some water and surfactant toward contact, produce electrostatic double layer phenomenon, keep steady state and more difficult removal.Conventional oily water separation technique comprises gravity settling, filtration, cyclonic separation, chemical method are separated, the combination of biotechnology and above-mentioned technology.Oil slick particle diameter is generally greater than 100 μm, and the particle diameter of dispersed oil is at 100 μm ~ 25 μm, and oil in water emulsion particle diameter is generally at 25 μm ~ 0.1 μm, and the particle diameter of dissolving oil is below 0.1 μm.Oil slick as particle diameter in oily(waste)water 60 μm ~ 150 μm mainly adopts gravity settling to remove, the dispersed oil employing coalescence technology removal that particle diameter is greater than 20 μm, dispersed oil, oil in water emulsion that particle diameter is greater than 10 μm adopt cyclonic separation, filtration, flotation technology to remove, and dissolving oil generally need be removed by biotechnology.Because chemical method is restricted, therefore Physical or physico-chemical processes degreasing technique become the focus of Recent study, existing Physical oil removing is all rely on gravity settling separation and realize substantially, but for the viscous crude polymer-bearing waste-water that stability is higher, because crude oil particle is difficult to Collision coagulation, so only do not reach satisfied treatment effect by simple natural gravity is settlement separate.Thus need to find out new efficient separation method and equipment, improve oil-water separation.
Summary of the invention
The object of the invention is to provide oil-containing sewage purifying device and separation method that a kind of separation of fine particle level oil in water emulsion, separation efficiency are high, solve the problem that existing separation method is restricted in actual applications due to the reason of economic or technological invention.
The technical solution adopted for the present invention to solve the technical problems is:
Oil-containing sewage purifying device comprises: post separator, water inlet distribution device, floating oil collecting device, at least one inflatable cyclone separator, at least one self-suction microbubble generator and at least one molten air elutriation go out microvesicle generators; In the cylinder of described refining plant, top is post separator, and bottom is inflatable cyclone separator; Molten air elutriation goes out the inflation point S of microvesicle generators on cylinder top, and the inflation point Q of self-suction microbubble generator is in cylinder bottom.
Described water inlet distribution device, at the central upper portion position of post separator, is connected with feeding pipe.
Described self-suction microbubble generator one section is connected with recycle pump by pipeline, and one section to be entered in post separator by pipeline and is connected with the tangential inlet Q of inflatable swirler.
Described molten air elutriation goes out microvesicle generators outside cylinder; Molten air elutriation goes out microvesicle generators one section by the saturated dissolved gas water of pipeline introducing from pressure air-dissolving tank, and another section will go out microvesicle generators by pipeline to be introduced in post separator at inflation point S through the outgas water containing a large amount of micro-bubble of step-down, energy dissipating, mass transfer, outgas through molten air elutriation.
Described inflatable cyclone separator, comprises a tangential inlet, cylinder swirl section, large cone section, small cone section and straight length; Tangential inlet is positioned at side in cylinder swirl section, and cylinder swirl section is down followed successively by large cone section, small cone section and straight length; Each cone is intersegmental with Flange joint and directly welding; The large cone angle of large cone section is 18 ~ 20 °, and the small-angle θ of small cone section is 6 ~ 10 °.
Described molten air elutriation goes out microvesicle generators and comprises a nozzle, static mixing element group and conduit; Nozzle and static mixing element group are by screwed connection, and static mixing element group and conduit pass through screwed connection; Static mixing element group is made up of the spiral plate of some torsions 180 ° or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, in left-handed or dextrorotation shape; In the diameter D size of nozzle, static mixing element group, the number n of spiral plate can adjust according to the size of required bubble size.
To the method that oily(waste)water is separated, oily(waste)water F enters in post separator by distribution device of intaking, flow downward, in oily(waste)water oil droplet with gone out bubble hit that microvesicle generators produces, adhesion by self-suction microbubble generator and molten air elutriation, rise floating to floating oil collecting device, downward fluid again through back taper pressurized circulation to self-suction microbubble generator, tangentially enter inflatable swirler, carry out cyclonic separation, and underflow is discharged as process water through thrust-augmenting nozzle T.
Beneficial effect, owing to have employed such scheme, two sections of pneumo type flotation posts go out microvesicle generators by post separator, inflatable cyclonic separator, self-priming bubble generator and molten air elutriation and form, the main body of device is the cylinder of a rounded cross section section, clear water (or recirculated water) is in pressure air-dissolving tank after dissolved under pressure, form saturated dissolved gas water, saturated dissolved gas water goes out microvesicle generators with certain pressure through molten air elutriation, after instantaneous controlled pressure drop, energy dissipating, mass transfer, outgas, thus formation microbubble intensive in a large number goes out microvesicle generators to flow out from molten air elutriation, molten air elutriation goes out microvesicle generators by nozzle, static mixing element, pig tail catheter forms, the saturated dissolved gas water of pressurization is through nozzle, a step-down, energy dissipating, mass transfer, outgas, again through static mixing element, described dissolved air water is working medium, the built-in panel element of impact flow in pipeline, increase the velocity slope of fluid telescopic movement or form turbulent flow, " segmentation-position is moved-again converged " during laminar flow, during turbulent flow, fluid is except above-mentioned three kinds of situations, also can produce violent eddy current in section direction, there is very strong shear action in working medium, secondary step-down, energy dissipating, mass transfer, outgas, and microbubble is split further, the intensive in a large number microbubble of final formation flows out through pig tail catheter, because its kinetic energy reduces greatly when the outgas water with a large amount of microbubble discharged enters in flotation column, flow velocity is low, close to staticize, and the approximate perfect condition realizing " static separation " of flotation column, meanwhile, the oily(waste)water in cylinder, by the back taper of the built-in cyclone separator lower end of flotation column, after recycle pump pressurization, through self-suction microbubble generator, thus completes ejection gas and gas dispersion is become the inflation whole process of microvesicle, oily(waste)water containing a large amount of microvesicle under a certain pressure, tangentially enter inflatable cyclonic separator, because wall restriction is high speed rotary motion by translate linear motion, and launch to form eddy flow layer along wall, in swirler, form stable centrifuge field, oil droplet simultaneously in water and bubble mutually collide and adhere to, under centrifugal action, enter the oil phase of swirler central section, and then form overflow vertically upward, aqueous phase near wall moves downward formation underflow, thus realizes oily water separation, oily(waste)water is fed by flotation column middle and upper part material inlet, oily(waste)water flows downward, and bubble upwards flows, and forms gas-liquid counter current state, in counter-current process, bubble and oil droplet collide, adhere to, and formation Qi Pao – oil droplet complex body floats up to cylinder top formation foam layer together and discharges through receiving tank.
Tiny, the of uniform size feature of microbubble size going out to manufacture in conjunction with molten air elutriation and the good separating effect of flotation column, molten air elutriation is gone out to manufacture microbubble mode to be introduced in Coal Flotation Column Process, play " joint effect " of two kinds of airing forms and cyclonic separation and dissolved air flotation two kinds of separate modes, two sections of pneumo type flotation posts have been widened method for floating and have been separated oil droplet size fraction ranges in oil-containing profit, idetified separation effect.
Advantage: utilize self-priming injection air-flow generation microvesicle and molten air elutriation to go out to produce microvesicle two kinds and inflate, " joint effect " of cyclonic separation and dissolved air flotation, micro-size fraction oil content in oily(waste)water effectively can be separated, efficiently solve fine fraction oil content and be separated difficult ground problem, effective flotation granularity lower limit is little, disengaging time is short, and running cost is low, solves oil in water emulsion in oily(waste)water and is separated difficult ground problem.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's two sections of pneumo type flotation posts.
Fig. 2 is the structural representation that the molten air elutriation of the present invention goes out microvesicle generators.
Fig. 3 is the structural representation of inflatable cyclone separator of the present invention.
In figure, 1, post separator; 2, pan feeding distribution device; 3, floating oil collecting device; 4, inflatable cyclone separator; 5, self-suction microbubble generator; 6, molten air elutriation goes out microvesicle generators; 7, back taper; 41, tangential inlet; 42, cylinder swirl section; 43, large cone section; 44, small cone section; 45 straight lengths; 61, nozzle; 62, static mixing element group; 63, pig tail catheter.
Embodiment
Embodiment 1: refining plant comprises post separator 1, water inlet distribution device 2, floating oil collecting device 3, at least one inflatable cyclone separator 4, at least one self-suction microbubble generator 5 and at least one molten air elutriation and goes out microvesicle generators 6; In the cylinder of described refining plant, top is post separator 1, and bottom is inflatable cyclone separator 4; Molten air elutriation goes out the inflation point S of microvesicle generators 6 on cylinder top, and the inflation point Q of self-suction microbubble generator 5 is in cylinder bottom.
Described water inlet distribution device 2, at the central upper portion position of post separator 1, is connected with feeding pipe.
Described self-suction microbubble generator 5 one sections is connected with recycle pump by pipeline, and one section to be entered in post separator 1 by pipeline and is connected with the tangential inlet Q of inflatable swirler.
Described molten air elutriation goes out microvesicle generators 6 outside cylinder; Molten air elutriation goes out microvesicle generators 6 one sections by the saturated dissolved gas water of pipeline introducing from pressure air-dissolving tank, and another section will go out microvesicle generators 6 by pipeline to be introduced in post separator 1 at inflation point S through the outgas water containing a large amount of micro-bubble of step-down, energy dissipating, mass transfer, outgas through molten air elutriation.
Described molten air elutriation goes out microvesicle generators 6 and comprises a nozzle 61, static mixing element group 62 and conduit 63; Nozzle 61 and static mixing element group 62 are by screwed connection, and static mixing element group 62 and conduit 63 pass through screwed connection; Static mixing element group 62 is made up of the spiral plate of some torsions 180 ° or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, in left-handed or dextrorotation shape; In the diameter D size of nozzle 61, static mixing element group 62, the number n of spiral plate can adjust according to the size of required bubble size.
Described inflatable cyclone separator 4, comprises a tangential inlet 41, cylinder swirl section 42, large cone section 43, small cone section 44 and straight length 45; Tangential inlet 41 is positioned at side in cylinder swirl section 42, and cylinder swirl section 42 is down followed successively by large cone section 43, small cone section 44 and straight length 45; Each cone is intersegmental with Flange joint and directly welding; The large cone angle of large cone section is 18 ~ 20 °, and the small-angle θ of small cone section is 6 ~ 10 °.
To the method that oily(waste)water is separated, oily(waste)water F enters in post separator 1 by distribution device 2 of intaking, flow downward, in oily(waste)water oil droplet with gone out bubble hit that microvesicle generators 6 produces, adhesion by self-suction microbubble generator 5 and molten air elutriation, rise floating to floating oil collecting device 3, downward fluid again through back taper 7 pressurized circulation to self-suction microbubble generator 5, tangentially enter inflatable swirler 4, carry out cyclonic separation, and underflow is discharged as process water through thrust-augmenting nozzle T.
Concrete methods of realizing is: two sections of pneumo type flotation posts go out microvesicle generators by post separator, inflatable cyclonic separator, self-priming bubble generator and molten air elutriation and form; Oily(waste)water is fed by flotation column middle and upper part material inlet; Oily(waste)water flows downward, and bubble upwards flows, and forms gas-liquid counter current state; In counter-current process, bubble and oil droplet collide, adhere to, and formation bubble-oil droplet complex body floats up to cylinder top formation foam layer together and discharges through receiving tank; Clear water (or recirculated water) is in pressure air-dissolving tank after dissolved under pressure, and form saturated dissolved gas water, saturated dissolved gas water goes out microvesicle generators with certain pressure through molten air elutriation, and the outgas water discharged with a large amount of microbubble enters in flotation column; Simultaneously, oily(waste)water in cylinder is by the back taper of the built-in cyclone separator lower end of flotation column, after recycle pump pressurization, through self-suction microbubble generator, tangentially enter inflatable cyclonic separator under a certain pressure, under centrifugal action, oil phase enters swirler central section and then forms overflow vertically upward, aqueous phase near wall moves downward formation underflow, thus realizes oily water separation.
Embodiment 2: in FIG, along post separator 1 from top to bottom direction, is followed successively by inflation point S, the self-suction microbubble generator inflation point Q and the inflatable cyclonic separator 4 that go out microvesicle generators 6 into water distribution device 2, molten air elutriation.Water-in, in the middle and upper part of cylinder, is connected with water inlet distribution device.Molten air elutriation goes out microvesicle generators 6 and is placed in outside cylinder, goes out microvesicle generators 6 and is connected and stretches in cylinder, stretch into position in the middle part of cylinder with an arm and molten air elutriation.Be down inflatable cyclonic separator 4 again, the hypomere of inflatable cyclonic device is a back taper 7.Self-suction microbubble generator 5 is placed in outside cylinder, and one section is connected with circulating-pump outlet by pipeline, and another section connects an arm and introduces in cylinder, and is connected with the tangential inlet Q of inflatable swirler 4.Connect an arm from the hypomere of back taper 7 and stretch out cylinder from column bottom, and be connected with the entrance of recycle pump.
In fig. 2, molten air elutriation goes out microvesicle generators 6 and comprises a nozzle 61, static mixing element group 62, pig tail catheter 63.Nozzle 61 and static mixing element group 62 are by screwed connection, and static mixing element group 62 and pig tail catheter 63 pass through screwed connection.Static mixing element group 62 is made up of the spiral plate of some torsions 180 ° or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, in left-handed or dextrorotation shape.In the diameter D size of nozzle 61, static mixing element group 62, the number n of spiral plate can adjust according to the size of required bubble size, when needing to reduce bubble size, can reduce diameter D or increase n; Otherwise, need larger bubble size can increase diameter D or reduce n.Saturated dissolved gas water W from pressure air-dissolving tank goes out after microvesicle generators 6 effect through molten air elutriation, forms the outgas water containing a large amount of micro bubble, then enters in post separator.
In figure 3, inflatable swirler 4 comprises a tangential inlet 41, cylinder swirl section 42, large cone section 43, small cone section 44 and straight length 45.Oily(waste)water enters cylinder swirl section 42 by the tangential inlet 41 of inflatable swirler 4, makes liquid produce vortex; Large cone section 43 utilizes the contraction in cone cross section, flow rate of liquid is increased and forms the speed of rotation of spiral, and the short and tapering of large cone section 43 greatly, can improve the separation that eddy flow acceleration is beneficial to profit; Small cone section 44 is main segregation section, and employing Small Taper can reduce the upper limit that separating oil divides particle diameter, can also keep higher speed of rotation, overcome the frictionloss of kinetic energy; Straight length 45 flow rate of liquid is basicly stable and there is certain backflow, is convenient to profit and is separated further.
During use, oily(waste)water F enters in post separator 1 by feeding device 2, flow downward, in oily(waste)water oil droplet with gone out bubble hit that microvesicle generators 6 and self-suction microbubble generator 5 produce, adhesion by molten air elutriation, rise floating to floating oil collecting device 3, downward fluid again through back taper 7 pressurized circulation to self-suction microbubble generator 5, tangentially enter inflatable swirler 4, carry out cyclonic separation, and underflow is discharged as process water through thrust-augmenting nozzle T.
Claims (4)
1. an oil-containing sewage purifying device, comprise post separator (1), floating oil collecting device (3), self-suction microbubble generator (5), described self-suction microbubble generator (5) one end is connected with recycle pump by pipeline, it is characterized in that: also comprise and go out microvesicle generators (6) into water distribution device (2), inflatable cyclone separator (4), at least one molten air elutriation; In the cylinder of described refining plant, top is post separator (1), and bottom is inflatable cyclone separator (4); The other end of self-suction microbubble generator (5) is entered in post separator (1) by pipeline and is connected with the tangential inlet Q of inflatable cyclone separator (4), molten air elutriation goes out the inflation point S of microvesicle generators (6) on cylinder top, and the inflation point Q of self-suction microbubble generator (5) is in cylinder bottom; Described water inlet distribution device (2), at the central upper portion position of post separator (1), is connected with water inlet pipe; Described molten air elutriation goes out microvesicle generators (6) outside cylinder; Molten air elutriation goes out microvesicle generators (6) sections by the saturated dissolved gas water of pipeline introducing from pressure air-dissolving tank, and another section will go out microvesicle generators (6) through molten air elutriation by pipeline and contain the outgas water of a large amount of micro-bubble in inflation point S introducing post separator (1) through step-down, energy dissipating, mass transfer, outgas.
2. according to the oil-containing sewage purifying device described in claim 1, it is characterized in that: described molten air elutriation goes out microvesicle generators (6) and comprises a nozzle (61), static mixing element group (62) and conduit (63); Nozzle (61) and static mixing element group (62) are by screwed connection, and static mixing element group (62) and conduit (63) pass through screwed connection; Static mixing element group (62) is made up of the spiral plate of some torsions 180 ° or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, in left-handed or dextrorotation shape; The number n of the middle spiral plate of the diameter D size of nozzle (61), static mixing element group (62) can adjust according to the size of required bubble size.
3. oil-containing sewage purifying device according to claim 1, it is characterized in that: described inflatable cyclone separator (4), comprise a tangential inlet (41), cylinder swirl section (42), large cone section (43), small cone section (44) and straight length (45); Tangential inlet (41) is positioned at the upper side of cylinder swirl section (42), and cylinder swirl section (42) is down followed successively by large cone section (43), small cone section (44) and straight length (45); Each cone is intersegmental with Flange joint and directly welding; The large cone angle of large cone section
αbe 18 ~ 20 °, the small-angle of small cone section
θit is 6 ~ 10 °.
4. the method using oil-containing sewage purifying device described in claim 1 to be separated oily(waste)water, it is characterized in that: oily(waste)water F enters in post separator (1) by distribution device of intaking (2), flow downward, molten air elutriation goes out microvesicle generators (6) sections by the saturated dissolved gas water of pipeline introducing from pressure air-dissolving tank, another section will go out microvesicle generators (6) through step-down through molten air elutriation by pipeline, energy dissipating, mass transfer, the outgas water that outgas contains a large amount of micro-bubble is introduced in post separator (1) at inflation point S, in oily(waste)water, oil droplet goes out with by self-suction microbubble generator (5) and molten air elutriation the bubble hit that microvesicle generators (6) produces, adhere to, rise floating to floating oil collecting device (3), downward fluid again through back taper (7) pressurized circulation to self-suction microbubble generator (5), tangentially enter inflatable cyclone separator (4), carry out cyclonic separation, because wall restriction is high speed rotary motion by translate linear motion, and launch to form eddy flow layer along wall, stable centrifuge field is formed in swirler, oil droplet simultaneously in water and bubble mutually collide and adhere to, under centrifugal action, enter the oil phase of swirler central section, and then form overflow vertically upward, aqueous phase near wall moves downward formation underflow, and underflow is discharged as process water through thrust-augmenting nozzle T.
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| CN208260569U (en) * | 2017-06-12 | 2018-12-21 | 大连双迪创新科技研究院有限公司 | Ultramicro air bubble liquid generating device |
| WO2018229912A1 (en) * | 2017-06-14 | 2018-12-20 | 新明和工業株式会社 | Waste water treatment device |
| CN111003831B (en) * | 2019-12-31 | 2023-10-27 | 湖南景翌湘台环保高新技术开发有限公司 | Pretreatment equipment and method for oil stains and SS in grinding wastewater |
| CN111921306B (en) * | 2020-07-31 | 2022-03-22 | 常州多单微电子设备有限公司 | Oil smoke waste gas effluent disposal system |
| CN113003799A (en) * | 2021-02-23 | 2021-06-22 | 西安恒利石油设备有限公司 | Complex oily sewage treatment system and process |
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