CN115501651A - Oil-water separation structure and oil-water separation method - Google Patents
Oil-water separation structure and oil-water separation method Download PDFInfo
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- CN115501651A CN115501651A CN202110697959.5A CN202110697959A CN115501651A CN 115501651 A CN115501651 A CN 115501651A CN 202110697959 A CN202110697959 A CN 202110697959A CN 115501651 A CN115501651 A CN 115501651A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 367
- 238000000926 separation method Methods 0.000 title claims abstract description 271
- 235000019198 oils Nutrition 0.000 claims abstract description 247
- 239000007787 solid Substances 0.000 claims abstract description 77
- 239000002245 particle Substances 0.000 claims abstract description 63
- 238000005452 bending Methods 0.000 claims abstract description 59
- 238000000746 purification Methods 0.000 claims abstract description 22
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 235000019476 oil-water mixture Nutrition 0.000 claims abstract description 3
- 230000005587 bubbling Effects 0.000 claims description 94
- 239000000463 material Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 25
- 239000002657 fibrous material Substances 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 231
- 241000197194 Bulla Species 0.000 abstract description 34
- 208000002352 blister Diseases 0.000 abstract description 34
- 230000000694 effects Effects 0.000 description 31
- 230000008569 process Effects 0.000 description 13
- 238000009826 distribution Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 11
- 239000012530 fluid Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 229910017053 inorganic salt Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 239000006185 dispersion Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Water Treatment By Sorption (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention relates to an oil-water separation device, and discloses an oil-water separation structure and an oil-water separation method, wherein the structure comprises the following components: including oil pipeline with be used for with oil pipeline separates the tympanic bulla oil water separating subassembly for water purification district and oil-water mixture district, tympanic bulla oil water separating subassembly includes first tympanic bulla oil water separating subassembly and is used for carrying out the second tympanic bulla oil water separating subassembly of secondary separation to the concentrated profit after this first tympanic bulla oil water separating subassembly separation, the last oil outlet pipeline that is provided with of oil pipeline, oil outlet pipeline sets up first tympanic bulla oil water separating subassembly's top, oil outlet pipeline includes first portion of bending and sets up the portion of bending of the second of first portion of bending below, the portion bottom of bending of second is provided with the granule export. This structure can directly go on in the pipeline, does not need additionally to add new device, reduces the water oil separating cost, and can realize the high-efficient separation of oil, water and solid particle.
Description
Technical Field
The invention relates to an oil-water separation device, in particular to an oil-water separation structure and an oil-water separation method.
Background
The resource pattern of China has the characteristics of rich coal, less oil and gas, and the vigorous industrial development of China puts increasing requirements on petroleum supply. However, in recent years, petroleum resources in China are increasingly tense, and the pressure of petroleum supply is increasing unprecedentedly.
At present, many oil fields in China enter a high water content exploitation stage, the water content in produced liquid is high, and the quality of produced oil is directly influenced. And a large amount of oily wastewater is generated in the oil exploitation process. The oil-water separation treatment technology is more and more emphasized by the field of oil exploitation.
In order to solve the problems in the prior art, an oil-water separator is additionally arranged, so that the occupied space and the cost of oil-water separation are greatly increased.
CN212800003U discloses an environment-friendly oil-water separation device, which separates oil from water by an oil-water separation membrane and is provided with a liquid inlet heating pipe. Oil-water separation is realized through the mode to fluid heating and oil-water separation membrane separation, but the flow direction of the fluid of the device is from the top down, and in the disengaging process, the solid particle that has in the fluid can the adhesion on oil-water separation membrane and be difficult for peeling off from oil-water separation membrane, and after the separation of one end time, oil-water separation's effect can reduce by a wide margin, and its long-term stability is not good.
CN108585095B discloses a loading circulation lamination flotation separation device and a reinforced oil-water separation method, a two-stage flotation series connection of lamination in space is constructed, and interstage substance exchange and hydraulic connection are realized through gas migration and conveying functions. Meanwhile, the spatial overlapping layout realizes the purpose of sequentially driving two-stage flotation by one-time gas input, and effectively improves the gas utilization efficiency and the oil-water separation efficiency. But the device structure is more complicated, and needs additionally to set up the device, greatly increased oil water separation's occupation of land space and cost.
Disclosure of Invention
The invention aims to solve the problems of high oil-water separation cost and large occupied area in the prior art, and provides an oil-water separation structure and an oil-water separation method.
In order to achieve the above object, the present invention provides an oil-water separation structure, including an oil pipeline and a bubbling oil-water separating assembly for dividing the oil pipeline into a water purifying region and an oil-water mixing region, where the bubbling oil-water separating assembly includes a first bubbling oil-water separating assembly and a second bubbling oil-water separating assembly for performing secondary separation on concentrated oil-water separated by the first bubbling oil-water separating assembly, the oil pipeline is provided with an oil outlet pipeline, the oil outlet pipeline is disposed above the first bubbling oil-water separating assembly, the oil outlet pipeline includes a first bending portion and a second bending portion disposed below the first bending portion, and a particle outlet is disposed at the bottom of the second bending portion.
According to another aspect of the present invention, there is provided an oil-water separation method, comprising the steps of:
injecting an oil-containing water material into an oil pipeline, and carrying out bubbling oil-water separation by sequentially passing through a first bubbling oil-water separation component and a second bubbling oil-water separation component;
and enabling the separated water-phase material to enter a water purification area, and enabling the separated oil-phase material with solid particles to enter an oil outlet pipeline, wherein the solid particles fall to a second bending part of the oil outlet pipeline after being accumulated and are discharged from a particle outlet, and the oil-phase material without the solid particles is discharged from an oil outlet of the oil outlet pipeline.
Through above-mentioned technical scheme, can realize following beneficial effect:
(1) Can directly carry out oil-water separation through the improvement to oil pipeline, need not additionally connect oil-water separator, the required area of greatly reduced oil-water separation process just can fall to oil-water separation's cost, and can realize the long period steady operation of chemical plant equipment.
(2) Through setting up first tympanic bulla oil water separating subassembly and second tympanic bulla oil water separating subassembly, can realize twice tympanic bulla separation through first tympanic bulla oil water separating subassembly and second tympanic bulla oil water separating subassembly, improve the separation effect, the mode of tympanic bulla separation also can improve separation speed.
(3) Through setting up oil pipeline just is located the top of second tympanic bulla oil water separating subassembly on the oil pipeline to make oil pipeline include first portion of bending and the second portion of bending, the portion of bending setting of will second is in the below of first portion of bending, at the oil production in-process, thereby the solid particle convergence in the fluid is gathered and is fallen to the bottom of the second portion of bending, thereby discharges from the granule export, and then realizes the separation of oil and solid particle.
(4) Can realize the separation of water, oil and solid particle, and the separation effect is better, and the separating rate is very fast, can realize high-efficient separation.
Drawings
FIG. 1 is a schematic structural view of an oil-water separation structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the structure of the bubble column oil-water separator assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a gas distributor according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of the gas distributor gas directing showerhead configuration according to one embodiment of the present invention.
Description of the reference numerals
1. 2-bubbling oil-water separation component of oil pipeline
3. Oil outlet pipeline
1a water purification area 1b oil-water mixing area
2a first bubbling oil-water separation component 2b second bubbling oil-water separation component
21. Porous Medium a region 22 porous Medium b region
23. Gas conduit 24 gas distributor
31. First bent portion 32 and second bent portion
241. Gas distributor inlet pipe 242 annular distributor pipe
243. Gas guiding structure of gas distributor
321. Particle outlet
2431. Gas distributor gas-guide tube 2432 gas distributor gas-guide nozzle
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In the present invention, unless otherwise specified, terms of orientation such as "upper, lower, left, right, front, and rear" are used to refer to the relative positions of the oil-water separation structure during use, where "upper" and "lower" refer to the upper and lower directions in the conventional manner, and "rear" refers to the direction in which oil-water flows in the pipe, and the opposite directions are "rear" and "left" and "right" refer to "left" and "right" in the case where "upper, lower, front, and rear" are defined. The terms "top" and "bottom" refer to the uppermost ends of the various components of the oil-water separation structure during use, and "bottom" refers to the lowermost ends of the various components of the oil-water separation structure during use. "inner and outer" are relative to the space enclosed by the conduit.
It is to be understood that, unless expressly stated or limited otherwise, the terms "connected," "mounted," and "contacting" are intended to be open-ended, i.e., connected as either a fixed or removable connection or an integral connection; the components may be directly connected or indirectly connected through an intermediate medium, or the components may be connected through an intermediate medium or the components may be in an interactive relationship with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In a basic embodiment of the oil-water separation structure according to the present invention, as shown in fig. 1, the oil-water separation structure includes an oil pipeline 1 and a bubble oil-water separation module 2 for partitioning the oil pipeline 1 into a water purification area 1a and an oil-water mixing area 1b, the bubble oil-water separation module 2 includes a first bubble oil-water separation module 2a and a second bubble oil-water separation module 2b for performing secondary separation on concentrated oil-water separated by the first bubble oil-water separation module 2a, an oil outlet pipeline 3 is provided on the oil pipeline 1, the oil outlet pipeline 3 is provided above the first bubble oil-water separation module 2a, the oil outlet pipeline 3 includes a first bending portion 31 and a second bending portion 32 provided below the first bending portion 31, and a particle outlet 321 is provided at the bottom of the second bending portion 32.
According to the invention, the bubbling oil-water separation component can be any component capable of realizing oil-water separation by a bubbling technology in the prior art. For example, the porous structure and the bubbling mechanism arranged on the porous structure are used for bubbling grease and particles adsorbed on the porous structure, and the hydrophilic filter membrane and the bubbling mechanism arranged below the hydrophilic filter membrane are used for blowing the particles up. Between first tympanic bulla oil water separating subassembly 2a and second tympanic bulla oil water separating subassembly 2b, between first tympanic bulla oil water separating subassembly 2a and 1 lower tubular wall of oil pipeline, and can lug connection between second tympanic bulla oil water separating subassembly 2b and 1 upper tubular wall of oil pipeline, also can connect through the separation layer, in order to prevent that the oil-water mixture from getting into water purification district 1a from between first tympanic bulla oil water separating subassembly 2a and second tympanic bulla oil water separating subassembly 2b, between first tympanic bulla oil water separating subassembly 2a and 1 lower tubular wall of oil pipeline and/or the clearance between second tympanic bulla oil water separating subassembly 2b and the 1 upper tubular wall of oil pipeline, thereby influence the separation effect of this oil-water separating structure.
The number of the first bending parts 31 is N, and the number of the second bending parts 32 is N, or N-1; where N is an integer of 1 or more, preferably, one of the first bent portion 31 and the second bent portion 32 is provided. The interval of first portion 31 and the second portion 32 of bending sets up, and just first portion 31 of bending buckles downwards, and second portion 32 of bending buckles upwards, and second portion 32 of bending sets up the below at first portion 31 of bending. During normal use, the particle outlet 321 is closed to prevent oil from being discharged from the particle outlet 321, and after separation is completed, the particle outlet 321 is opened to discharge particles accumulated at the particle outlet 321.
Specifically, the pipeline in the area where the bubbling oil-water separation assembly 2 is arranged in the oil pipeline 1 may include one section, or may include two sections arranged in front of and behind the bubbling oil-water separation assembly 2, and each section of the oil pipeline 1 is located on the same horizontal plane. In the transmission direction of oily water material, tympanic bulla oil water separator subassembly 2 and oil outlet pipeline 3 correspond and are provided with at least a set of to can guarantee the cleanliness factor of the water of going out from 1 delivery port of oil pipeline, improve the water oil separating effect. The diameter ratio of the oil pipeline 1 and the oil outlet pipeline 3 can be specifically determined by a person skilled in the art according to the volume ratio of oil to water in the oily water material, so as to prevent the oily water material from entering the oil outlet pipeline 3 to influence the oil-water separation effect. In order to further improve the oil-water separation effect, the diameter ratio of the oil delivery pipe 1 and the oil delivery pipe 3 is preferably 3 to 5:1. In an embodiment of the invention, the ratio of the diameters of the oil flow conduit 1 and the oil flow conduit 3 is 4:1.
preferably, in order to increase the accumulation time of the solid particles in the flowline 3, the flowline 3 is configured to gradually decrease from the inlet end to the outlet end, and under the same injection pressure, the larger the caliber of the flowline is, the slower the flowing speed of the liquid is, the smaller the flowline 3 is, and the smaller the flow speed of the liquid is, the larger caliber of the inlet end is capable of increasing the staying time of the oil liquid at the inlet end of the flowline, so as to increase the accumulation time of the oil liquid in the flowline 3, and further improve the cleaning effect of the solid particles in the oil liquid. The outlet end is set to be small-caliber, so that the retention time of the oil for removing solid particles in the oil outlet pipeline 3 can be reduced, and the oil is discharged.
When the oil-water separation structure provided by the basic embodiment works, an oil-water-containing material is injected from an inlet of an oil pipeline 1, enters an oil-water mixing region 1b, and provides a certain injection pressure, so that the oil-water-containing material can flow in the oil pipeline 1, during the flowing process, the oil-water-containing material firstly passes through a first bubbling oil-water separation component 2a to perform first oil-water separation, water obtained by the first oil-water separation enters a water purification region 1a, a high-concentration oil-containing material with solid particles obtained by the first oil-water separation is continuously remained in the oil-water mixing region 1b, and reaches a second bubbling oil-water separation component 2b to perform second oil-water separation under the push of the injection pressure, and water obtained by the second oil-water separation enters the water purification region 1a to be mixed with the water obtained by the first oil-water separation, and flows outwards under the push of the injection pressure; the oil with solid particles obtained by the second oil-water separation floats above water and enters the oil outlet pipeline 3 under the pushing of the injection pressure, the solid particles are accumulated and deposited under the accumulation action and are deposited at the bottom end (the second bending part 32) of the oil outlet pipeline 3, and the oil is discharged from the oil outlet of the oil outlet pipeline 3, so that the separation of the solid particles and the oil is realized.
In the oil-water separation structure provided by the basic embodiment, the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b are arranged, so that twice bubbling separation can be realized through the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b, the separation effect is improved, and the separation speed can also be improved through the bubbling separation mode. Through setting up oil pipeline 3 oil pipeline 1 is last and be located the top of second tympanic bulla oil water separating subassembly 2b to make oil pipeline 3 include first bending portion 31 and the second bending portion 32, set up second bending portion 32 the below of first bending portion 31, at the oil outlet in-process, the solid particle in the fluid can gather and thereby fall to the bottom of second bending portion 32, thereby discharge from granule export 321, and then realize the separation of oil and solid particle. Can directly carry out oil-water separation through the improvement to oil pipeline 1, need not additionally connect oil-water separator, the required area of greatly reduced oil-water separation process just can fall to oil-water separation's cost, and can realize the long period steady operation of chemical plant equipment. Can realize the separation of water, oil and solid particle, and the separation effect is better, and the separating rate is very fast, can realize high-efficient separation.
First tympanic bulla oil water separating subassembly 2a and second tympanic bulla oil water separating subassembly 2b can set up with arbitrary mode, and first tympanic bulla oil water separating subassembly 2a and second tympanic bulla oil water separating subassembly 2b also can set up to optional shape wantonly to guarantee that the concentrated profit after first tympanic bulla oil water separating subassembly 2a separates can get into second tympanic bulla oil water separating subassembly 2b and carry out the secondary separation, specifically, second tympanic bulla oil water separating subassembly 2b can set up the top at first tympanic bulla oil water separating subassembly 2a. In one embodiment of the present invention, referring to fig. 1, the first and second bubble separator modules 2a and 2b are both disposed to be inclined from the bottom end to the top end along the oil-water flow direction, and the second bubble separator module 2b is disposed above and behind the first bubble separator module 2a. The first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b are both arranged to incline along the oil-water flowing direction from the bottom to the top, so that the contact area between an oily water material and the first bubbling oil-water separation component 2a or between the oily water material and the second bubbling oil-water separation component 2b can be increased, and the influence on the transmission of the oily water material can be avoided.
In order to promote the oily water material to be capable of carrying out two times of bubbling oil-water separation, preferably, the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b are provided with a distance in the transmission direction of the oil pipeline 1, and the size of the distance can be determined by those skilled in the art according to practical situations. In order to be able to further improve the oil-water separation effect, it is preferable that the horizontal distance between the center of the first bubble oil-water separation assembly 2a and the center of the second bubble oil-water separation assembly 2b is 0.3 to 0.6m. In the embodiment of the present invention, the horizontal distance between the center of the first bubble oil water separation assembly 2a and the center of the second bubble oil water separation assembly 2b is set to 0.5cm.
In one embodiment of the present invention, referring to fig. 2, the bubbling oil-water separation module 2 comprises a porous medium a region 21, a porous medium b region 22, and a gas conduit 23 disposed between the porous medium a region 21 and the porous medium b region 22, wherein the gas conduit 23 is connected with a plurality of gas distributors 24.
Specifically, the gas conduit 23 is externally connected with a gas supply device, which may be a gas generating device or a container storing gas.
In a specific using process, taking the porous medium a area 21 arranged in front of the porous medium b area 22 as an example, the oily water material enters the porous medium a area 21 to be separated under the action of hydraulic pressure, the oily water material which is not completely separated enters the porous medium b area 22 to be secondarily separated, oil and particles are adsorbed in porous structures in the porous medium a area 21 and the porous medium b area 22, when the oil and the particles are adsorbed to a certain degree, the oil and the particles slide down from the porous structures and float on the surface of the oily water material under the action of buoyancy, gas is continuously injected into the gas conduit 23 in the process, and the gas distributor 24 blows air to the porous medium a area 21 and the porous medium b area 22, so that the separation of the oil, the solid particles and the water can be promoted, and meanwhile, the oil can also slide down from the porous structures, and therefore, the separation effect is improved.
The pore size of the porous medium a region 21, the pore size of the porous medium b region 22, and the thickness ratio of the porous medium a region 21 and the porous medium b region 22 may be determined by those skilled in the art as the case may be, and in a relatively preferred embodiment of the present invention, the porous medium a region 21 is disposed in front of the porous medium b region 22, the pore size of the porous medium a region 21 is 30 to 100 μm, the pore size of the porous medium b region 22 is 1 to 10 μm, and the thickness ratio of the porous medium a region 21 and the porous medium b region 22 is 1 (5 to 10). In the separation process, the separation aperture is gradually reduced, the separated liquid can be further separated, and smaller oil and particles in the liquid can be separated, so that a better oil-water separation effect can be achieved. And the numerical value of the aperture is also suitable for adsorbing oil in water.
The thickness of the porous medium a-region 21 may be determined by those skilled in the art according to actual circumstances. In order to further improve the oil-water separation effect, the thickness of the porous medium a area 21 is 5-25 μm. In an embodiment of the present invention, the thickness of the porous medium a region 21 is 15 μm.
The gas distributor 24 may be any one of the gas distributors disclosed in the prior art, and in one embodiment of the present invention, referring to fig. 3, the gas distributor 24 includes a gas distributor inlet pipe 241, a gas distributor annular distribution pipe 242 connected to the gas distributor inlet pipe 241, and a plurality of gas distributor gas guide structures 243 dispersedly disposed on the gas distributor annular distribution pipe 242. Set up the distribution pipe of gas distributor into annular distribution pipe to set up gas distributor gas guide structure 243 dispersion on gas distributor annular distribution pipe 242, can increase gaseous discharge range and angle, reach better air-blowing effect, thereby further improve the water oil separating effect.
The gas distributor gas directing structure 243 may be any structure capable of achieving gas directing and gas injection effects as disclosed in the prior art, and in one embodiment of the present invention, referring to fig. 3, the gas distributor gas directing structure 243 comprises a gas distributor gas guide tube 2431 and a gas distributor gas guide showerhead 2432. Through the setting of a plurality of gas distributor air guide shower nozzles 2432, can make gas to a plurality of directions blowout, also can increase gaseous blowout rate simultaneously to improve oil water separation effect.
In one embodiment of the present invention, the number of the gas distributor gas guide structures 243 is at least 10, and the ratio of the diameters of the gas distributor gas guide tube 2431 and the gas distributor annular distributor tube 242 is 1 (10-20). Through the limitation of the number of the gas guide structures 243 of the gas distributor and the diameter ratio of the gas guide pipes 2431 of the gas distributor to the annular distribution pipes 242 of the gas distributor, the gas discharge speed and the gas distribution range can be effectively controlled, and the better oil-water separation effect can be achieved.
In one embodiment of the invention, the gas distributor gas directing nozzle 2432 is configured as a hemisphere, and the gas distributor gas directing nozzle 2432 has an open area ratio of 0.5-5%. The gas guide nozzle 2432 of the gas distributor is hemispherical, the aperture ratio of the gas guide nozzle is 0.5-5%, the discharge direction of gas can be further dispersed, the discharge rate of the gas can be controlled, and therefore a better oil-water separation effect can be achieved. The holes are designed as shown in fig. 4, and there are multiple groups, each group of holes is arranged on the gas distributor gas directing nozzle 2432 around the circumference, and the multiple groups of gas distributor gas directing nozzles 2432 are dispersed from the top to the periphery of the gas distributor gas directing nozzle 2432.
In one embodiment of the invention, the included angle between the first bubble oil-water separation component 2a and the horizontal plane is 14-35 degrees, and the vertical height of the first bubble oil-water separation component 2a accounts for 65-85% of the diameter of the oil pipeline 1. Through the setting, can enough increase the area of contact of oily water material and first tympanic bulla oil water separating subassembly 2a, improve the water oil separating effect, can not cause the influence at the transmission of oily water material yet.
In one embodiment of the invention, the included angle between the second bubble oil-water separation component 2b and the horizontal plane is 14-35 degrees, and the top end of the first bubble oil-water separation component 2a is set to be equal to the height of 1/3-1/2 of the second bubble oil-water separation component 2 b. The contact area between the oily water material and the second bubbling oil-water separation component 2b can be increased, the oil-water separation effect is improved, and the influence on the transmission of the oily water material is avoided.
In one embodiment of the invention, the ratio of the distance from the first bend 31 to the top of the oil pipeline 1 and the distance from the second bend 32 to the top of the oil pipeline 1 is (2-3): 1. Above-mentioned setting can increase the time of solid particle deposit in the fluid, improves solid particle's deposit effect, also can prevent simultaneously that the oily water material in the oil pipeline 1 from getting into out oil pipe 3, improves the separation effect of oil, water and solid particle.
As a relatively preferred embodiment of the present invention, there is provided an oil-water separation structure, as shown in fig. 1 to 4, comprising an oil pipeline 1 and a bubbling oil-water separating unit 2 for partitioning the oil pipeline 1 into a water purification zone 1a and an oil-water mixing zone 1 b; the bubbling oil-water separation component 2 comprises a first bubbling oil-water separation component 2a and a second bubbling oil-water separation component 2b, the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b are both arranged to incline along the oil-water flowing direction from the bottom end to the top end, the second bubbling oil-water separation component 2b is arranged above and behind the first bubbling oil-water separation component 2a, and the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b are connected through a separation layer; the bubbling oil-water separation assembly 2 comprises a porous medium a area 21, a porous medium b area 22 and a gas conduit 23 arranged between the porous medium a area 21 and the porous medium b area 22, wherein the gas conduit 23 is connected with a plurality of gas distributors 24, and the plurality of gas distributors 24 are dispersedly arranged on the gas conduit 23 along the extension direction of the bubbling oil-water separation assembly 2; wherein, the porous medium a area 21 is arranged above the porous medium b area 22, the aperture of the porous medium a area 21 is 30-100 μm, the aperture of the porous medium b area 22 is 1-10 μm, and the thickness ratio of the porous medium a area 21 and the porous medium b area 22 is 1/10-1/5; the gas distributor 24 comprises a gas distributor inlet pipe 241, a gas distributor annular distribution pipe 242 connected with the gas distributor inlet pipe 241, and a plurality of gas distributor gas guide structures 243 dispersedly arranged on the gas distributor annular distribution pipe 242, wherein the plurality of gas distributor gas guide structures 243 are circumferentially arranged on the gas distributor annular distribution pipe 242; the gas distributor gas guide structure 243 comprises at least 10 gas distributor gas guide tubes 2431 and gas distributor gas guide nozzles 2432, the diameter ratio of the gas distributor gas guide tubes 2431 to the gas distributor annular distribution tubes 242 is 1/20-1/10, the gas distributor gas guide nozzles 2432 are hemispherical, and the opening rate of the gas distributor gas guide nozzles 2432 is 0.5-5%; the included angle between the first bubbling oil-water separation component 2a and the horizontal plane and the included angle between the second bubbling oil-water separation component 2b and the horizontal plane are set to be 14-35 degrees, the included angle between the first bubbling oil-water separation component 2a and the horizontal plane is equal to the included angle between the second bubbling oil-water separation component 2b and the horizontal plane, the vertical height of the first bubbling oil-water separation component 2a accounts for 65-85 percent of the diameter of the oil pipeline 1, and the top end of the first bubbling oil-water separation component 2a is set to be as high as the height of 1/3-1/2 of the second bubbling oil-water separation component 2 b; be provided with oil outlet pipe 3 on oil pipeline 1, oil outlet pipe 3 sets up the top at first tympanic bulla oil water separator subassembly 2a, oil outlet pipe 3 includes first bending portion 31 and sets up the second bending portion 32 in first bending portion 31 below, and first bending portion 31 sets up down, second bending portion 32 sets up, the ratio of the distance of first bending portion 31 to 1 top of oil pipeline and the distance of second bending portion 32 to 1 top of oil pipeline is (2-3): 1, second bending portion 32 bottom is provided with granule export 321.
The second bubble water separator module 2b shown in fig. 1 is provided entirely within the oil pipeline 1.
The operation of the oil-water separation structure provided by the above preferred embodiment of the present invention is the same as that of the basic embodiment.
In the oil-water separation structure provided by the preferred embodiment, by providing the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b, twice bubbling separation can be realized by the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b, so that the separation effect is improved, and the separation speed can also be improved by the bubbling separation mode. Through setting up bubbling oil-water separation subassembly 2 to include porous medium a district 21, porous medium b district 22 and set up the gas conduit 23 between porous medium a district 21 and porous medium b district 22, be connected with a plurality of gas distributor 24 on the gas conduit 23, can make the profit through this department fully filter through setting up porous medium a district 21 and porous medium b district 22, gas distributor 24's setting can promote oil-water separation to promote the drippage of liquid droplet, thereby improve oil-water separation effect and efficiency. Through setting up oil pipeline 3 oil pipeline 1 is last and be located the top of second tympanic bulla oil water separating subassembly 2b to make oil pipeline 3 include first bending portion 31 and the second bending portion 32, set up second bending portion 32 the below of first bending portion 31, at the in-process of producing oil, thereby the solid particle convergence in the fluid gathers and falls to the bottom of the second bending portion 32, thereby discharges from granule export 321, and then realizes the separation of oil and solid particle. Can directly carry out oil-water separation through the improvement to oil pipeline 1, need not additionally connect oil-water separator, the required area of greatly reduced oil-water separation process just can fall to oil-water separation's cost, and can realize the long period steady operation of chemical plant equipment. Can realize the separation of water, oil and solid particle, and the separation effect is better, and the separating rate is very fast, can realize high-efficient separation.
In a basic embodiment of the oil-water separation method of the present invention, the method includes the steps of:
injecting an oil-containing water material into an oil pipeline 1, and carrying out bubbling oil-water separation by sequentially passing through a first bubbling oil-water separation component 2a and a second bubbling oil-water separation component 2 b;
the separated water phase material enters the water purification area 1a, and the separated oil phase material with solid particles enters the oil outlet pipeline 3, wherein the solid particles fall to the second bending part 32 of the oil outlet pipeline 3 after being accumulated and are discharged from the particle outlet 321, and the oil phase material without the solid particles is discharged from the oil outlet of the oil outlet pipeline 3.
Specifically, the oil outlet pipe 3 is provided with a first bending portion 31 and a second bending portion 32, and the first bending portion 31 is disposed upward, the second bending portion 32 is disposed downward, and the height of the second bending portion 32 is lower than that of the first bending portion 31.
In the oil-water separation method provided by the basic embodiment, the separation effect is improved by two times of bubble separation, and the separation speed can also be improved by the bubble separation mode. The solid particles in the oil liquid are collected and fall to the bottom of the second bending part 32 during the oil discharging process, so as to be discharged from the particle outlet 321, thereby realizing the separation of the oil and the solid particles. The method can realize the separation of water, oil and solid particles, has good separation effect and high separation speed, and can realize high-efficiency separation.
The method provided by the invention is carried out in the oil-water separation structure in the above embodiment of the invention.
The inlet pressure of the oil pipeline 1 can be determined by those skilled in the art according to actual conditions, and in order to improve the separation effect, in a specific embodiment of the invention, the inlet pressure of the oil pipeline 1 is 0.1-0.3MPa, and the linear velocity of the oily water material is 0.1-0.3m/s.
The first and second bubble oil- water separation modules 2a and 2b may be plates having a porous structure or may be layered structures filled with a material having a porous structure. In order to improve the oil-water separation effect, in one embodiment of the present invention, the fillers in the first and second bubble oil- water separation modules 2a and 2b are independently selected from inorganic salts and/or fiber materials. Wherein, the inorganic salt can adopt inorganic salt with poor water solubility and oil solubility, such as calcium carbonate, magnesium carbonate and the like, and the granular parts of the inorganic salt form adsorption holes through the granular structure of the inorganic salt. The fiber material can be a fiber material capable of adsorbing grease in the prior art, and the fiber material can be a porous fiber material, such as activated carbon fiber with a porous structure or other porous activated carbon fiber materials, and oil and solid particles in the oily water material are adsorbed through the porous structure in the porous fiber material. The porosity of the first bubbling oil-water separation module 2a and the second bubbling oil-water separation module 2b is 90% -98%, and preferably 96% -98%.
The first and second bubbling oil- water separation modules 2a and 2b may be porous structures formed by laying fiber materials, and the fiber materials may be conventional fiber materials or porous fiber materials.
According to a particularly preferred embodiment of the invention, the method comprises the following steps:
injecting an oil-containing water material into an oil pipeline 1, and carrying out bubbling oil-water separation by sequentially passing through a first bubbling oil-water separation component 2a and a second bubbling oil-water separation component 2 b;
the separated water phase material enters the water purification area 1a, and the separated oil phase material with solid particles enters the oil outlet pipeline 3, wherein the solid particles fall to the second bending part 32 of the oil outlet pipeline 3 after being accumulated and are discharged from the particle outlet 321, and the oil phase material without the solid particles is discharged from the oil outlet of the oil outlet pipeline 3;
wherein the inlet pressure of the oil pipeline 1 is 0.1-0.3MPa, the linear velocity of the oily water material is 0.1-0.3m/s, the fillers in the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b are respectively and independently selected from inorganic salt and/or fiber materials, and the porosity of the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b is 90-98%.
The present invention will be described in detail below by way of examples. In the following examples, parameters of oil content in water and water content in oil phase were measured by shimadzu TOC and mettler water analysis; the porous fiber material is designed for a laboratory, and the porosity of the porous fiber material is 98 percent; calcium carbonate was used as the filler material and was sold under the trade designation TCG202, and the test data was random samples.
Example 1
Injecting 1t of oily water material into an oil pipeline 1, and carrying out bubbling oil-water separation by sequentially passing through a first bubbling oil-water separation component 2a and a second bubbling oil-water separation component 2 b;
the separated water phase material enters the water purification area 1a, and the separated oil phase material with solid particles enters the oil outlet pipeline 3, wherein the solid particles fall to the second bending part 32 of the oil outlet pipeline 3 after being accumulated and are discharged from the particle outlet 321, and the oil phase material without the solid particles is discharged from the oil outlet of the oil outlet pipeline 3;
wherein the inlet pressure of the oil pipeline 1 is 0.2MPa, the linear velocity of the oily water material is 0.2m/s, and the method provided by the embodiment is carried out in the oil-water separation structure shown in figures 1-4;
specifically, the vertical height of the first bubbling oil-water separation component 2a accounts for 75% of the diameter of the oil pipeline 1, the top end of the first bubbling oil-water separation component 2a is set to be equal to 1/2 of the height of the second bubbling oil-water separation component 2b, the included angles between the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b and the horizontal plane are both 20 degrees, 15 gas guide structures 243 are arranged, the diameter ratio of the gas guide tube 2431 of the gas distributor to the annular distribution tube 242 of the gas distributor is 1/15, and the aperture ratio of the gas guide nozzle 2432 of the gas distributor is 0.5%;
the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b are consistent, the filler is a porous activated carbon fiber material, the aperture of the porous medium a region 21 is 50 micrometers, the aperture of the porous medium b region 22 is 5 micrometers, and the thickness ratio of the porous medium a region 21 to the porous medium b region 22 is 1/8;
the ratio of the distance from the first bent portion 31 to the top of the oil pipeline 1 to the distance from the second bent portion 32 to the top of the oil pipeline 1 is 2:1.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, after the separation is completed, the oil content in the water purification area is 20mg/L, the solid content is 0.015%, the water content in the oil outlet pipe is 29.7%, and the solid content is 1.89%.
Example 2
The process of example 1 was followed except that: the gas distributor gas directing jets 2432 have an open porosity of 5%.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, and after the separation is completed, the oil content in the water purification area is 38mg/L, the solid content is 0.1%, the water content in the oil outlet pipe is 36%, and the solid content is 1.75%.
Example 3
The process of example 1 was followed except that: the gas distributor gas directing jets 2432 had an open porosity of 0.9%.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, after the separation is completed, the oil content in the water purification area is 25mg/L, the solid content is 0.02%, the water content in the oil outlet pipe is 30%, and the solid content is 1.88%.
Example 4
The process of example 1 was followed except that: the gas distributor gas directing jets 2432 have an open porosity of 10%.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, after the separation is completed, the oil content in the water purification area is 45mg/L, the solid content is 0.15%, the water content in the oil outlet pipe is 25.5%, and the solid content is 1.82%.
Example 5
The process of example 1 was followed except that: the vertical height of the first bubbling oil-water separation component 2a accounts for 90% of the diameter of the oil pipeline 1, the top end of the first bubbling oil-water separation component 2a is set to be as high as 2/3 of the height of the second bubbling oil-water separation component 2b, and the included angles between the first bubbling oil-water separation component 2a and the second bubbling oil-water separation component 2b and the horizontal plane are both 45 degrees.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, after the separation is completed, the oil content in the clean water area is 23.5mg/L, the solid content is 0.022%, the water content in the oil outlet pipe is 28.9%, and the solid content is 1.95%.
Example 6
The process of example 1 was followed except that: the pore diameter of the porous medium a region 21 is 200 μm, the pore diameter of the porous medium b region 22 is 20 μm, and the thickness ratio of the porous medium a region 21 and the porous medium b region 22 is 1/20.
The oil content in the water in the embodiment is 3700mg/L and the solid content is 1.6 percent through analysis, and after the separation is completed, the oil content in the water purification area is 45mg/L, the solid content is 0.15 percent, the water content in the oil outlet pipe is 27.8 percent and the solid content is 1.68 percent.
Example 7
The process of example 1 was followed except that: there are 5 gas distributor gas directing structures 243 and the ratio of the diameter of the gas distributor gas duct 2431 to the gas distributor annular distributor pipe 242 is 1/5.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, and after the separation is completed, the oil content in the water purification area is 55mg/L, the solid content is 0.19%, the water content in the oil outlet pipe is 25.9%, and the solid content is 1.66%.
Example 8
The process of example 1 was followed except that the filler of the first and second bubble oil water separation modules 2a and 2b was calcium carbonate particles.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, after the separation is completed, the oil content in the water purification area is 36mg/L, the solid content is 0.08%, the water content in the oil outlet pipe is 26.1%, and the solid content is 1.7%.
Example 9
The method of example 1 was followed except that the porous medium a region 21 and the porous medium b region 22 were polymer plates, and the polymer was made porous by the material itself, with a porosity of 95%.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, and after the separation is completed, the oil content in the water purification area is 22mg/L, the solid content is 0.02%, the water content in the oil outlet pipe is 28.3%, and the solid content is 1.73%.
Comparative example 1
According to the method of example 9, except that only the first bent portion 31 is provided in the oil line 3, the bubble oil water separation module 2 includes only the first bubble oil water separation module 2a.
The analysis shows that the oil content in the water in the embodiment is 3700mg/L, the solid content is 1.6%, and after the separation is completed, the oil content in the water purification area is 1300mg/L, the solid content is 0.9%, the water content in the oil outlet pipe is 62%, and the solid content is 1.14%.
Comparative example 2
The method of example 9 was followed except that the gas conduit 23 and the gas distributor 24 were not provided in the bubbling oil-water separation module 2.
The oil content in the water in the embodiment is 3700mg/L and the solid content is 1.6 percent through analysis, and after the separation is completed, the oil content in the water purification area is 800mg/L, the solid content is 0.8 percent, the water content in the oil outlet pipe is 48 percent and the solid content is 1.23 percent.
By comparing the data, the oil-water separation method and the oil-water separation structure can reduce the water content and the solid content of the oil liquid and the oil content and the solid content of the water, and can effectively reduce the time required by separation, thereby realizing the high-efficiency separation of the water, the oil and the solid particles.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (14)
1. The utility model provides an oil-water separation structure, its characterized in that, include oil pipeline (1) and be used for with oil pipeline (1) separates bubble oil-water separation subassembly (2) for net water district (1 a) and oil-water mixture district (1 b), bubble oil-water separation subassembly (2) include first bubble oil-water separation subassembly (2 a) and are used for carrying out secondary separation's second bubble oil-water separation subassembly (2 b) to the concentrated profit after this first bubble oil-water separation subassembly (2 a) separation, be provided with oil outlet pipeline (3) on oil pipeline (1), oil outlet pipeline (3) set up the top of first bubble oil-water separation subassembly (2 a), just oil outlet pipeline (3) include first bending portion (31) and set up second bending portion (32) of first bending portion (31) below, second bending portion (32) bottom is provided with granule export (321).
2. The oil-water separation structure according to claim 1, wherein the first bubble oil-water separation assembly (2 a) and the second bubble oil-water separation assembly (2 b) are arranged to be inclined in the oil-water flow direction from the bottom end to the top end, and the second bubble oil-water separation assembly (2 b) is arranged above and behind the first bubble oil-water separation assembly (2 a).
3. The oil-water separation structure according to claim 1, wherein the bubbling oil-water separation assembly (2) comprises a porous medium a-zone (21), a porous medium b-zone (22) and a gas conduit (23) arranged between the porous medium a-zone (21) and the porous medium b-zone (22), and a plurality of gas distributors (24) are connected to the gas conduit (23).
4. The oil-water separation structure according to claim 3, wherein the porous medium a region (21) is provided in front of the porous medium b region (22), the pore size of the porous medium a region (21) is 30 to 100 μm, the pore size of the porous medium b region (22) is 1 to 10 μm, and the thickness ratio of the porous medium a region (21) and the porous medium b region (22) is 1/10 to 1/5.
5. The oil-water separation structure according to claim 3, wherein the gas distributor (24) comprises a gas distributor inlet pipe (241), a gas distributor annular distributor pipe (242) connected with the gas distributor inlet pipe (241), and a plurality of gas distributor gas guide structures (243) dispersedly arranged on the gas distributor annular distributor pipe (242).
6. The oil and water separation structure of claim 5, wherein the gas distributor gas directing structure (243) comprises a gas distributor gas guide tube (2431) and a gas distributor gas guide showerhead (2432).
7. The oil-water separation structure of claim 6, wherein the number of the gas distributor gas guide structures (243) is at least 10, and the ratio of the diameters of the gas distributor gas guide pipes (2431) to the annular gas distributor pipe (242) is 1/20-1/10.
8. The oil-water separation structure as claimed in claim 6, wherein the gas distributor gas guide nozzle (2432) is provided in a hemispherical shape, and the gas distributor gas guide nozzle (2432) has an opening ratio of 0.5-5%.
9. The oil-water separation structure according to any one of claims 1-8, wherein the included angle of the first bubble oil-water separation component (2 a) and the horizontal plane is 14-35 degrees, and the vertical height of the first bubble oil-water separation component (2 a) accounts for 65-85% of the diameter of the oil pipeline (1).
10. The oil-water separation structure according to any one of claims 1-8, wherein the angle between the second bubble oil-water separation assembly (2 b) and the horizontal plane is 14-35 °, and the top end of the first bubble oil-water separation assembly (2 a) is set to be equal to the height of the second bubble oil-water separation assembly (2 b) by 1/3-1/2.
11. The oil-water separation structure according to any one of claims 1-8, characterized in that the ratio of the distance from the first bend (31) to the top of the oil pipeline (1) and the distance from the second bend (32) to the top of the oil pipeline (1) is (2-3): 1.
12. An oil-water separation method is characterized by comprising the following steps:
injecting an oil-containing water material into an oil pipeline (1), and carrying out bubbling oil-water separation by sequentially passing through a first bubbling oil-water separation component (2 a) and a second bubbling oil-water separation component (2 b);
and enabling the separated water-phase material to enter a water purification area (1 a), and enabling the separated oil-phase material with solid particles to enter an oil outlet pipeline (3), wherein the solid particles fall to a second bending part (32) of the oil outlet pipeline (3) after being accumulated and are discharged from a particle outlet (321), and the oil-phase material without the solid particles is discharged from an oil outlet of the oil outlet pipeline (3).
13. The oil-water separation method according to claim 12, wherein the inlet pressure of the oil pipeline (1) is 0.1-0.3MPa, and the linear velocity of the oily water material is 0.1-0.3m/s.
14. The method for oil-water separation according to claim 12 or 13, wherein the filler in the first and second bubble oil-water separation modules (2 a, 2 b) is independently selected from inorganic salts and/or fibrous materials.
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