CN103979637A - Purification device and separation method of oily sewage - Google Patents
Purification device and separation method of oily sewage Download PDFInfo
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- CN103979637A CN103979637A CN201410217739.8A CN201410217739A CN103979637A CN 103979637 A CN103979637 A CN 103979637A CN 201410217739 A CN201410217739 A CN 201410217739A CN 103979637 A CN103979637 A CN 103979637A
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Abstract
The invention discloses a purification device and a separation method of oily sewage. The device comprises a water inlet allocation device, a column separator, a floating oil collection device, an inflatable cyclone separator, at least one self-sucked type micro-bubble generator and at least one dissolved gas separation micro-bubble generator, wherein the column separator is arranged at the upper part of the column body; the built-in inflatable cyclone separator is arranged at the lower part of the column body; the column separator and the inflatable cyclone separator are communicated vertically; an inflation point of the dissolved gas separation micro-bubble generator is arranged at the upper part of the column body; an inflation point of the self-sucked type micro-bubble generator is arranged at the lower part of the column body. By adopting the two inflation modes that the micro-bubble is generated through negative self-sucked ejection air flow and high-pressure dissolved gas depressurization separation, the hydrocyclone separation and the floating separation are coupled, refined granular oil in the oily sewage can be effectively separated, the low limit of effective flotation granularity is small, the separation time is short, the operation cost is low, and the problem that emulsified oil in the oily sewage is hard to separate is solved.
Description
Technical field
The present invention relates to a kind of oil-water separation purification device and separation method, relate in particular to a kind of oil-containing sewage purifying device and separation method containing oil in water emulsion.
Technical background
Oily(waste)water is the various lots of source of pollution that produce in oil development utilization activity.Oily(waste)water is effectively processed, made sewage qualified discharge, reclaim wherein oil product, not only protected environment, and produced economic benefit, realized the unification of environmental benefit and economic benefit.
In oily(waste)water, oil content is mainly composed and is existed in water body with forms such as oil slick, dispersed oil, oil in water emulsion, dissolving oil He You – solidss.Oily water separation complexity depends on the existence form of oil content in water, the fine dispersed oil and the oil in water emulsion that in sewage, with colloidal state, exist, particle diameter is less, toward contact, adheres to impurity and the surfactant in some water, produce electrostatic double layer phenomenon, keep steady state and more difficult removal.Conventional oily water separation technique comprises the combination of gravity settling, filtration, cyclonic separation, chemical method separation, biotechnology and above-mentioned technology.Oil slick particle diameter is generally greater than 100 μ m, and the particle diameter of dispersed oil is at 100 μ m～25 μ m, and oil in water emulsion particle diameter is generally at 25 μ m～0.1 μ m, and the particle diameter of dissolving oil is below 0.1 μ m.As mainly adopting gravity settling, removes the oil slick of the 60 μ m～150 μ m of particle diameter in oily(waste)water, the dispersed oil that particle diameter is greater than 20 μ m adopts coalescence technology to remove, dispersed oil, oil in water emulsion that particle diameter is greater than 10 μ m 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 to rely on gravity settling separation and realize substantially, but for the higher viscous crude polymer-bearing waste-water of stability, because former oil particles is difficult to Collision coagulation, so only depend on, simple natural gravity is settlement separate does not reach satisfied treatment effect.Thereby 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 a kind of separation of fine particle level oil in water emulsion, oil-containing sewage purifying device and separation method that separation efficiency is high, solve existing separation method due to the former of economy or technological invention thereby the problem that is restricted in actual applications.
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.
One section of described self-suction microbubble generator is connected with recycle pump by pipeline, and one section is entered in post separator and is connected with the tangential inlet Q of inflatable swirler by pipeline.
Described molten air elutriation goes out microvesicle generators in cylinder outside; Molten air elutriation goes out one section of microvesicle generators and introduces the saturated dissolved gas water from pressure air-dissolving tank by pipeline, and another section introduced in post separator at inflation point S through the outgas water that contains a large amount of micro-bubbles of step-down, energy dissipating, mass transfer, outgas go out microvesicle generators through molten air elutriation by pipeline.
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 a side in cylinder swirl section, and cylinder swirl section is down followed successively by large cone section, small cone section and straight length; Each bores intersegmental with flange connection 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 are by screwed connection; Static mixing element group is comprised of the spiral plate of 180 ° of some torsions or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, are 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.
Oily(waste)water is carried out to separated method, oily(waste)water F is entered in post separator by the distribution device of intaking, flow downward, in oily(waste)water oil droplet with by self-suction microbubble generator and molten air elutriation, gone out bubble hit, the adhesion that microvesicle generators produces, 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 processing water through thrust-augmenting nozzle T.
Beneficial effect, owing to having adopted such scheme, two sections of pneumo type flotation posts go out microvesicle generators by post separator, inflatable cyclonic separator, self-priming bubble producer and molten air elutriation and form, the main body of device is the cylinder of a circular transversal 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, thereby form a large amount of intensive microbubbles, from molten air elutriation, go out microvesicle generators to flow out, 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, pass through again 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, during laminar flow, be " cut apart-position is moved-again converged ", 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 further cut apart, the final intensive microbubbles in a large number that form flow out through pig tail catheter, when the outgas water with a large amount of microbubbles discharging enters in flotation column, because its kinetic energy reduces greatly, flow velocity is low, approaches staticize, the approximate perfect condition that realizes " static separation " of flotation column sorting, meanwhile, the oily(waste)water in cylinder is by the back taper of the built-in cyclone separator of flotation column lower end, after recycle pump pressurization, through self-suction microbubble generator, thereby completes ejection gas and gas dispersion become to the inflation whole process of microvesicle, the oily(waste)water that contains a large amount of microvesicles is under certain pressure, tangentially enter inflatable cyclonic separator, because wall restriction changes high speed rotary motion into by translational motion, and launch to form eddy flow layer along wall, in swirler, form stable centrifuge field, oil droplet and bubble in water mutually collides and adheres to simultaneously, under centrifugal action, enter the oil phase of swirler central section, and then form vertically upward overflow, water near wall moves downward formation underflow, thereby 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 collision, adhesion, formation Qi Pao – oil droplet complex body floats up to together cylinder top formation foam layer and discharges through receiving tank.
Tiny, the of uniform size feature of microbubble size and the good separating effect of flotation column that in conjunction with molten air elutriation, go out to manufacture, molten air elutriation is gone out to manufacture microbubble mode to be introduced in Coal Flotation Column Process, bring into play " joint effect " of two kinds of airing forms and cyclonic separation and two kinds of separate modes of dissolved air flotation, two sections of pneumo type flotation posts have been widened oil droplet grade scope in the separated oil-containing profit of method for floating, strengthening separating effect.
Advantage: utilize self-priming injection air-flow generation microvesicle and molten air elutriation to go out to produce two kinds of inflations of microvesicle, " joint effect " of cyclonic separation and dissolved air flotation, can carry out effective separation to the micro-size fraction oil content in oily(waste)water, effectively solved the separated difficult ground of fine fraction oil content problem, effectively flotation granularity lower limit is little, disengaging time is short, and running cost is low, has solved the separated difficult ground of oil in water emulsion problem in oily(waste)water.
Accompanying drawing explanation
Fig. 1 is the structural representation of two sections of pneumo type flotation posts of the present invention.
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 that 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 go 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.
5 one sections of described self-suction microbubble generators are connected with recycle pump by pipeline, and one section is entered in post separator 1 and is connected with the tangential inlet Q of inflatable swirler by pipeline.
Described molten air elutriation goes out microvesicle generators 6 in cylinder outside; Molten air elutriation goes out 6 one sections of microvesicle generators and introduces the saturated dissolved gas water from pressure air-dissolving tank by pipeline, and another section introduced in post separator 1 at inflation point S through the outgas water that contains a large amount of micro-bubbles of step-down, energy dissipating, mass transfer, outgas go out microvesicle generators 6 through molten air elutriation by pipeline.
Described molten air elutriation goes out microvesicle generators 6 and comprises a nozzle 61, static mixing element group 62 and conduit 63; Nozzle 61 is with static mixing element group 62 by screwed connection, and static mixing element group 62 and conduit 63 are by screwed connection; Static mixing element group 62 is comprised of the spiral plate of 180 ° of some torsions or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, are 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 a 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 bores intersegmental with flange connection 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 °.
Oily(waste)water is carried out to separated method, oily(waste)water F is entered in post separator 1 by the distribution device 2 of intaking, flow downward, in oily(waste)water oil droplet with by self-suction microbubble generator 5 and molten air elutriation, gone out bubble hit, the adhesion that microvesicle generators 6 produces, 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 processing 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 producer 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 collision, adhesion, formation bubble-oil droplet complex body floats up to together cylinder top formation foam layer and discharges through receiving tank; Clear water (or recirculated water) after dissolved under pressure, forms saturated dissolved gas water in pressure air-dissolving tank, and saturated dissolved gas water goes out microvesicle generators with certain pressure through molten air elutriation, and the outgas water discharging with a large amount of microbubbles enters in flotation column; Simultaneously, oily(waste)water in cylinder is by the back taper of the built-in cyclone separator of flotation column lower end, after recycle pump pressurization, through self-suction microbubble generator, under certain pressure, tangentially enter inflatable cyclonic separator, under centrifugal action, oil phase enters swirler central section and then forms vertically upward overflow, water near wall moves downward formation underflow, thereby realizes oily water separation.
Embodiment 2: in Fig. 1, along post separator 1 direction from top to bottom, be followed successively by inflation point S, the self-suction microbubble generator inflation point Q and the inflatable cyclonic separator 4 that into water distribution device 2, molten air elutriation, go out microvesicle generators 6.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 be connected and stretch in cylinder with an arm and molten air elutriation, stretches into position at cylinder middle part.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 to be introduced in cylinder, and is connected with the tangential inlet Q of inflatable swirler 4.From the hypomere of back taper 7, connect an arm 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 is with static mixing element group 62 by screwed connection, and static mixing element group 62 and pig tail catheter 63 are by screwed connection.Static mixing element group 62 is comprised of the spiral plate of 180 ° of some torsions or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, are 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, in the time of need to reducing bubble size, can reduce diameter D or increase n; Otherwise, need larger bubble size can increase diameter D or reduce n.From the saturated dissolved gas water W of pressure air-dissolving tank, after molten air elutriation goes out microvesicle generators 6 effects, form the outgas water that contains a large amount of micro bubbles, then enter in post separator.
In Fig. 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 sections, flow rate of liquid is increased and form the speed of rotation of spiral, and large cone section 43 is short and tapering is large, can improve the separation that eddy flow acceleration is beneficial to profit; Small cone section 44 is main segregation section, adopts Small Taper can reduce the upper limit that separating oil is divided particle diameter, can also keep higher speed of rotation, overcomes the frictionloss of kinetic energy; Straight length 45 flow rate of liquid are basicly stable and have certain backflow, are convenient to profit further separated.
During use, oily(waste)water F is entered in post separator 1 by feeding device 2, flow downward, oil droplet and the bubble hit, the adhesion that by molten air elutriation, are gone out microvesicle generators 6 and self-suction microbubble generator 5 generations in oily(waste)water, 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 processing water through thrust-augmenting nozzle T.
Claims (7)
1. an oil-containing sewage purifying device, is characterized in that: refining plant comprises that post separator (1), water inlet distribution device (2), floating oil collecting device (3), inflatable cyclone separator (4), at least one self-suction microbubble generator (5) and at least one molten air elutriation go 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.
2. oil-containing sewage purifying device according to claim 1, is characterized in that: described water inlet distribution device (2), at the central upper portion position of post separator (1), is connected with water inlet pipe.
3. oil-containing sewage purifying device according to claim 1, it is characterized in that: (5) one sections of described self-suction microbubble generators are connected with recycle pump by pipeline, and one section is entered in post separator (1) and is connected with the tangential inlet Q of inflatable swirler by pipeline.
4. oil-containing sewage purifying device according to claim 1, is characterized in that: described molten air elutriation goes out microvesicle generators (6) in cylinder outside; Molten air elutriation goes out (6) one sections of microvesicle generators and introduces the saturated dissolved gas water from pressure air-dissolving tank by pipeline, and another section will go out outgas water that microvesicle generators (6) contains a large amount of micro-bubbles through step-down, energy dissipating, mass transfer, outgas in inflation point S introducing post separator (1) through molten air elutriation by pipeline.
5. according to the oil-containing sewage purifying device described in claim 1 or 4, 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) is with static mixing element group (62) by screwed connection, and static mixing element group (62) and conduit (63) are by screwed connection; Static mixing element group (62) is comprised of the spiral plate of 180 ° of some torsions or 270 °, and adjacent two plate orthogonal sets are contained in sleeve pipe, are 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.
6. oil-containing sewage purifying device according to claim 1, it is characterized in that: 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 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 bores intersegmental with flange connection 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 °.
7. one kind is utilized oil-containing sewage purifying device described in claim 1 to carry out separated method to oily(waste)water, it is characterized in that: oily(waste)water F is entered in post separator (1) by the distribution device of intaking (2), flow downward, in oily(waste)water oil droplet with by self-suction microbubble generator (5) and molten air elutriation, gone out the bubble hit of microvesicle generators (6) generation, 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 swirler (4), carry out cyclonic separation, and underflow is discharged as processing water through thrust-augmenting nozzle T.
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| CN106166518A (en) * | 2016-08-22 | 2016-11-30 | 江苏金点环保科技有限公司 | A kind of dynamic hydrocyclone |
| CN106241949A (en) * | 2016-08-01 | 2016-12-21 | 湖南水木科技有限公司 | A kind of many whirlwind waterpower separation deoiling methods and equipment |
| CN108246132A (en) * | 2017-06-12 | 2018-07-06 | 大连双迪创新科技研究院有限公司 | Ultramicro air bubble liquid generating means |
| CN110662721A (en) * | 2017-06-14 | 2020-01-07 | 新明和工业株式会社 | Sewage treatment device |
| CN111003831A (en) * | 2019-12-31 | 2020-04-14 | 湖南景翌湘台环保高新技术开发有限公司 | Pretreatment equipment and method for grinding oil stains and SS in wastewater |
| CN111921306A (en) * | 2020-07-31 | 2020-11-13 | 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 |
| CN116573704A (en) * | 2023-06-27 | 2023-08-11 | 无锡海拓环保装备科技有限公司 | Oil-water separation device for air floatation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106241949A (en) * | 2016-08-01 | 2016-12-21 | 湖南水木科技有限公司 | A kind of many whirlwind waterpower separation deoiling methods and equipment |
| CN106166518A (en) * | 2016-08-22 | 2016-11-30 | 江苏金点环保科技有限公司 | A kind of dynamic hydrocyclone |
| CN108246132A (en) * | 2017-06-12 | 2018-07-06 | 大连双迪创新科技研究院有限公司 | Ultramicro air bubble liquid generating means |
| CN108246132B (en) * | 2017-06-12 | 2023-10-27 | 大连双迪创新科技研究院有限公司 | Ultra-micro bubble liquid generating device |
| CN110662721A (en) * | 2017-06-14 | 2020-01-07 | 新明和工业株式会社 | Sewage treatment device |
| CN111003831A (en) * | 2019-12-31 | 2020-04-14 | 湖南景翌湘台环保高新技术开发有限公司 | Pretreatment equipment and method for grinding oil stains and SS in wastewater |
| 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 |
| CN111921306A (en) * | 2020-07-31 | 2020-11-13 | 常州多单微电子设备有限公司 | Oil smoke waste gas effluent disposal system |
| 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 |
| CN116573704A (en) * | 2023-06-27 | 2023-08-11 | 无锡海拓环保装备科技有限公司 | Oil-water separation device for air floatation method |
| CN116573704B (en) * | 2023-06-27 | 2024-02-02 | 无锡海拓环保装备科技有限公司 | Oil-water separation device for air floatation method |
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