CN115784538A - Oil-containing wastewater separation and filtration device and method - Google Patents
Oil-containing wastewater separation and filtration device and method Download PDFInfo
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- CN115784538A CN115784538A CN202310075848.XA CN202310075848A CN115784538A CN 115784538 A CN115784538 A CN 115784538A CN 202310075848 A CN202310075848 A CN 202310075848A CN 115784538 A CN115784538 A CN 115784538A
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Abstract
The invention discloses a device and a method for separating and filtering oily wastewater, and relates to the field of separation of the oily wastewater. The invention does not need to occupy excessive space positions and has high separation efficiency.
Description
Technical Field
The invention relates to the field of oil-containing wastewater separation, in particular to a device and a method for separating and filtering oil-containing wastewater.
Background
The offshore oil field high oil content and high solid content waste water is a pollutant generated in the drilling process of the offshore oil field, and how to simply and efficiently separate the oil content waste water is a hot problem which is always concerned by researchers in the field.
Therefore, the existing oil-containing wastewater treatment method and device with the application number of 202111541526.7 based on aggregation-induced demulsification carry out double filtration on wastewater through a special-shaped filter element filled with aggregation-induced demulsification filler and a super-hydrophilic-oleophobic filter element, and then oil and water are separated. However, most oil fields are deeply exploited at present, and various chemical agents are added in the crude oil exploitation process, so that the properties of components in the oily wastewater are complex and the emulsification is serious, and the treatment difficulty is increased accordingly. Therefore, it is obvious that a good separation effect cannot be achieved by merely performing separation by a physical method.
The application number 202110815813.6 is a sewage treatment method, which destabilizes oil in sewage through the action of an electric field, enables an electrode plate to generate a flocculating agent through continuous electrification, and finally separates floc precipitated at the bottom of the sewage and floc floating at the top of the sewage from the sewage respectively. However, the method has a severe requirement on the device, cannot be placed and used in offshore oil fields well, has low separation efficiency, and contains a large amount of heavy oil components in the oil water, and cannot separate heavy oil well.
Disclosure of Invention
The invention aims to provide a separation and filtration device and a separation and filtration method which are more suitable for quickly separating oily wastewater in an offshore oilfield, and solve the problems that the offshore oilfield is small in space position and the oily wastewater can be efficiently and quickly separated.
The purpose is realized by adopting the following technical scheme:
this device from the bottom up includes in proper order that the broken breast chamber, reaction chamber and the filter chamber of dismantling the connection, and the broken breast intracavity is filled there is the breakdown of emulsion filler, is provided with the feed inlet that is used for letting in the flocculating agent on the reaction chamber.
At first, broken breast chamber, for dismantling the connection between reaction chamber and the filter chamber, consequently when needs use, directly can use the three combination, when need not use, the three is dismantled, do not occupy unnecessary spatial position, and, broken breast chamber, reaction chamber and filter chamber from the bottom up set gradually, oily waste water from the bottom up flows in proper order in broken breast chamber, reaction chamber and the filter chamber, further reduces separator's width, make it more be convenient for use in offshore oil field.
Secondly, a first partition plate is arranged in the filter cavity, the first partition plate divides the filter cavity into an upper cavity and a lower cavity, a second partition plate is arranged in the lower cavity, the lower cavity is divided into a lower inner cavity and a lower outer cavity by the second partition plate from inside to outside, the lower inner cavity, the upper cavity and the reaction cavity are communicated, oil-water separation membranes are arranged on the first partition plate and the second partition plate, wastewater in the reaction cavity enters the lower inner cavity through the reaction cavity after flocculation treatment, the wastewater is filtered in the lower inner cavity through the oil-water separation membranes, so that water enters the lower outer cavity through the oil-water separation membranes, separated oil is in the lower inner cavity and the upper cavity, and the separated oil is in the upper cavity and the lower inner cavity. Oil is discharged through a first oil outlet in the upper chamber. The oil-water separation membrane is a separation membrane which takes a PVDF membrane as a net membrane framework and hydrogel as a surface membrane, and the first partition plate and the horizontal plane have an included angle, so that oil drops isolated in the upper cavity can better slide into the lower inner cavity under the action of gravity along the first partition plate, and water directly enters the lower outer cavity through the first partition plate.
This device is through gathering induced breakdown of emulsion granule and ceramic particle in the breakdown of emulsion intracavity to carry out the breakdown of emulsion processing to waste water, wherein, gathering induced breakdown of emulsion granule is basalt fiber fabric and polyvinyl alcohol introduction surface cross-linking's method, the hydrophilic type composite membrane material with sandwich structure who prepares out, prepare into the particle shape that has certain diameter size with it, in the use, because there are a large amount of micro-channels in the basalt fiber fabric structure, can provide effectual capillary force to promote the continuous of aqueous phase in the emulsion to pass through, along with the aqueous content constantly reduces in the emulsion, oil drop concentration constantly increases, can improve the collision probability between the oil drop, thereby cause the aggregation of little oil drop and form big oil drop, and further destroy the stability of whole emulsion system, finally realize the water oil water separation of emulsion. The aggregation-induced emulsion breaking particles are made of flexible materials, so the ceramic particles and the aggregation-induced emulsion breaking particles are combined for use by the inventor, the ceramic particles are made of hard materials, a large number of grooves are formed in the ceramic particles, the wastewater is in contact with the ceramic particles, the collision speed between oil drops can be accelerated, the aggregation of the oil drops is faster and better, the stability of an emulsion system is rapidly destroyed, and for the aggregation-induced emulsion breaking particles, the ceramic particles can be wrapped and protected, and the phenomenon that the use efficiency is influenced by the deformation of the aggregation-induced emulsion breaking particles under the action of multiple collisions is avoided.
Furthermore, the ratio of the aggregation-inducing emulsion breaking particles to the ceramic particles in the device is 1.2-0.5, the aggregation-inducing emulsion breaking particles are firstly made into spheres, the spheres are more favorable for water to pass through and simultaneously aggregate oil drops in the using process, and gaps are formed between the spheres to accelerate the water to pass and the aggregation of the oil drops. Secondly, the diameter of the hard ceramic particles is smaller than that of the aggregation-induced demulsification particles, the ceramic particles are wrapped around the aggregation-induced demulsification particles to protect the aggregation-induced demulsification particles, the aggregation-induced demulsification particles are prevented from being deformed greatly, the two diameters of the aggregation-induced demulsification particles and the ceramic particles are larger, gaps are further formed between the aggregation-induced demulsification particles and the ceramic particles, the circulation of water is accelerated, the aggregation-induced demulsification particles with different sizes and the ceramic particles accelerate oil drop collision, the aggregation-induced demulsification particles are enabled to be large oil drops in a better and faster mode, and the use efficiency is further improved.
Furthermore, the breakdown of emulsion chamber of this device includes a plurality of connection chambeies, the upper end of connecting the chamber can be dismantled with the lower terminal surface of reaction chamber and be connected, connect the back, the inside of connecting the chamber communicates with the inside of reaction chamber, it places the induced breakdown of emulsion granule of gathering and ceramic particle to connect the intracavity, this device places the induced breakdown of emulsion granule of gathering and ceramic particle inside a plurality of connection chambeies, can avoid the condition in the broken breast chamber of the inhomogeneous entering of waste water, waste water after the breakdown of emulsion also can evenly distributed's the entering reaction chamber simultaneously, and simultaneously, the connection chamber can be more convenient for change at any time in the use in a plurality of connection chambeies, guarantee breakdown of emulsion efficiency.
Preferably, be provided with on the lower terminal surface of reaction chamber and dismantle a plurality of connecting holes of being connected with the breakdown of emulsion chamber, a plurality of connection chamber and a plurality of connecting hole one-to-one, when using, directly will connect the chamber and be connected with the connecting hole, connect the inside and the inside intercommunication of reaction chamber in chamber, waste water gets into the reaction chamber from the bottom up after connecting the chamber, be provided with the rotary rod in the reaction chamber, be provided with a plurality of stirring pieces on the rotary rod, the lower extreme and the rotor plate that the reaction chamber was passed to the lower extreme of rotary rod are connected, the rotor plate is connected with the motor, back in waste water gets into the reaction chamber, let in the flocculating agent in the reaction chamber, let in the back, the rotary rod drives the stirring piece rotatory, stir it, the accelerated reaction.
Preferably, the outer side of the reaction cavity is detachably connected with a connecting frame, and the connecting frame is provided with a tripod support. The sample device can be directly erected on an offshore oilfield, the lower end of the demulsification cavity is arranged in a suspended mode, wastewater is directly connected into the demulsification cavity from the lower end, and when the sample device is not used, all parts can be directly taken down, and the sample device is convenient to operate and use.
The invention provides a method for separating and filtering oily wastewater, which comprises the following steps:
and 4, discharging oil through the first oil outlet, and discharging water through a water outlet in the lower outer cavity.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the device and the method for separating and filtering the oily wastewater are vertically arranged, do not occupy excessive space positions, and are more suitable for being used in offshore oil fields.
This device combines to handle waste water through physics and chemical method, handles the back at its through the breakdown of emulsion for the waste water after handling can filter by high efficiency fast in the filter chamber, more convenient to use, wherein during the breakdown of emulsion, the inventor combines the use with the induced breakdown of emulsion granule of flexible gathering and the ceramic particle of stereoplasm, cooperates different size simultaneously, the breakdown of emulsion efficiency that can further improve, and then improves separation efficiency.
Secondly, the broken breast chamber of this device comprises a plurality of connection chambeies, when using, not only can ensure that waste water more even gets into and connects the chamber, and waste water after the breakdown of emulsion also can be more even gets into the reaction chamber in, further improvement reaction efficiency, secondly, also can be fast convenient when needs change connect the chamber change the processing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the apparatus in example 1;
FIG. 2 is a schematic view showing the structure of a connecting chamber in embodiment 1;
FIG. 3 is a schematic view of the structure of a reaction chamber in example 1;
FIG. 4 is a schematic structural view of a filter chamber in embodiment 1;
FIG. 5 is a schematic view showing a positional relationship of a connecting hole of a second connecting valve in embodiment 2;
FIG. 6 is a schematic view of the structure of a rotating rod in a reaction chamber in example 2.
Reference numbers and corresponding part names in the drawings:
1-a milk breaking cavity, 2-a reaction cavity, 3-a filtering cavity, 4-a connecting frame, 5-a tripod support, 6-a connecting pipe, 7-a liquid inlet pipe, 8-a first oil outlet, 9-a third connecting valve, 10-an upper cavity, 11-a lower cavity, 12-a fourth connecting valve, 13-a first connecting valve, 14-a second connecting valve, 15-a rotating plate, 16-a rotating rod, 17-a stirring sheet, 18-a connecting hole, 19-a connecting end and 20-a water outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.
Example 1
As shown in fig. 1, the device comprises a breast breaking cavity 1, a reaction cavity 2 and a filter cavity 3 which are detachably connected in sequence from bottom to top;
the breast breaking cavity 1 comprises a plurality of connecting cavities, the structure of each connecting cavity is shown in figure 2, and the upper ends of the connecting cavities are provided with connecting ends 19; the connection intracavity is filled with the breakdown of emulsion filler, and the lower extreme in every connection chamber is provided with connecting pipe 6, and every connecting pipe 6 all is connected with feed liquor pipe 7, and waste water passes through feed liquor pipe 7, connecting pipe 6 and gets into in the connection chamber.
The structure of the reaction chamber 2 is shown in fig. 3, the reaction chamber 2 comprises a first connecting valve 13 and a second connecting valve 14 which are positioned at the upper end and the lower end of the chamber body, the second connecting valve is provided with a plurality of connecting holes 18, the connecting holes 18 correspond to the connecting chambers one by one, the connecting holes are connected with the connecting ends of the connecting chambers through threads, and after the connection, the inside of the connecting chambers is communicated with the inside of the reaction chambers; the outer side of the reaction chamber 2 is detachably connected with a connecting frame 4, and the connecting frame 4 is provided with a tripod bracket 5.
The structure of the filter cavity 3 is as shown in fig. 4, the filter cavity 3 comprises a third connecting valve 9 and a fourth connecting valve 12 which are positioned at the upper end and the lower end of the cavity, a first partition plate is arranged in the filter cavity 3 and divides the filter cavity 3 into an upper cavity 10 and a lower cavity, a second partition plate is arranged in the lower cavity and divides the lower cavity into a lower inner cavity 11 and a lower outer cavity from inside to outside, the lower inner cavity 11, the upper cavity 10 and the reaction cavity 2 are communicated with each other inside, oil-water separation membranes are arranged on the first partition plate and the second partition plate and enable water to enter the lower outer cavity, the oil level of the water enters the lower inner cavity 11 and the upper cavity 10, and the wastewater enters the reaction cavity 2 and the filter cavity 3 through the breast breaking cavity 1 in sequence. In this embodiment, the first partition plate forms an angle of 30 degrees with the horizontal plane.
When the device is used, the connecting frame 4 is sleeved on the outer side of the reaction cavity 2, the connecting frame and the reaction cavity are fixedly connected through threads, and after the connecting frame is fixed, the tripod bracket on the connecting frame can be used for supporting the device; the connecting end at the upper end of the connecting cavity is connected with the connecting hole 18 on the second connecting valve through threads, and after the connecting end is connected, the inside of the connecting cavity is communicated with the inside of the reaction cavity 2. The fourth connecting valve 12 is connected with the first connecting valve 13, and the reaction cavity is communicated with the lower inner cavity 11 in the filtering cavity after connection. When waste water treatment filters, with waste water through feed liquor pipe 7, during connecting pipe 6 gets into the connection chamber, waste water from the bottom up carries out filtration treatment connecting the intracavity, aggregation induction emulsion breaking granule and ceramic particle in the connection chamber carry out the emulsion breaking treatment to it, waste water after the processing gets into the reaction chamber through connecting the chamber, waste water and flocculating agent reaction in the reaction chamber, carry out flocculation treatment, waste water after the flocculation treatment gets into the lower inner chamber in the filter chamber through the reaction chamber, waste water filters through the filter chamber and makes water get into outer chamber under in, oil drips the gathering in epicoele and inner chamber under, discharge oil through first oil-out 8 on epicoele 10 at last.
In some embodiments, the oil-water separation membrane is a separation membrane using a PVDF membrane as a mesh framework and a hydrogel membrane as a surface membrane, which is a conventional material, and the present inventors do not describe here any further.
In some embodiments, the flocculant is a microbial flocculant formed by compounding a microorganism sphingomonas and polyferric chloride, which is an existing material and is not described herein by the present inventors.
In some embodiments, the demulsification filler comprises aggregation-induced demulsification particles and ceramic particles, wherein the aggregation-induced demulsification particles are basalt fiber fabrics and polyvinyl alcohol, and a surface crosslinking method is introduced to prepare a hydrophilic composite membrane material with a sandwich structure, and the aggregation-induced demulsification particles are prepared into particle shapes with certain diameters; the ceramic particles are TiC particles, and the ceramic particles and aggregation-induced emulsion breaking particles are conventional materials, which are not described herein by the inventors.
Example 2
In some embodiments, as shown in fig. 6, a rotating rod 16 is disposed in the reaction chamber 2, a plurality of stirring blades 17 are disposed on the rotating rod 16, a lower end of the rotating rod 16 penetrates through a lower end of the reaction chamber 2 to be connected to the rotating plate 15, and the rotating plate 15 is connected to a motor. A pressure sensor can be arranged on the second connecting valve 14 of the reaction cavity, when wastewater enters the reaction cavity 2, the wastewater causes pressure to the pressure sensor, the pressure sensor controls a feed inlet for introducing a flocculating agent to the reaction cavity 2 to introduce the flocculating agent, and meanwhile, the motor is controlled to work to drive the rotating rod 16 and the stirring sheet 17 on the rotating rod to rotate, so that the wastewater and the flocculating agent are uniformly mixed in the reaction cavity.
In some embodiments, the positions of the connection holes 18 on the second connection valve are shown in fig. 5, and the connection holes are uniformly distributed on the outer side of the rotating plate, so that the waste water after demulsification can be more uniformly introduced into the reaction chamber when in use.
Example 3
The oily wastewater is introduced into a plurality of connecting cavities in the emulsion breaking cavity for experiment, the diameter ratio of aggregation-induced emulsion breaking particles and ceramic particles in the first connecting cavity is 1:0.2, the diameter ratio of aggregation-induced emulsion breaking particles and ceramic particles in the second connecting cavity is 1: 0.5, the diameter ratio of aggregation-induced emulsion breaking particles and ceramic particles in the third connecting cavity is 1: 0.3, the diameter ratio of aggregation-induced emulsion breaking particles and ceramic particles in the fourth connecting cavity is 1: 1.5, and the diameter ratio of aggregation-induced emulsion breaking particles and ceramic particles in the fifth connecting cavity is 1: 0.05.
70kg of petroleum is contained in 100kg of oily wastewater, the oily wastewater is respectively introduced into a first connecting cavity to a fifth connecting cavity with the same content, and is introduced from the lower end of the first connecting cavity to the lower end of the fifth connecting cavity until the oily wastewater is taken out from the upper end of the first connecting cavity to the upper end of the fifth connecting cavity, after standing for 10 minutes, the thickness of an oil layer is measured, and upper oil is extracted to obtain table 1;
TABLE 1
As can be seen from table 1, the emulsion breaking effect of the first connection chamber, the second connection chamber and the third connection chamber is the best, wherein the diameter ratio of the aggregation-inducing emulsion breaking particles and the ceramic particles is in the range of 1.2-0.5, so that a better emulsion breaking effect can be achieved when the diameter ratio of the aggregation-inducing emulsion breaking particles and the ceramic particles is in the range of the present invention, and the diameter of the aggregation-inducing emulsion breaking particles is larger than that of the ceramic particles, the hard ceramic particles can form protection around the aggregation-inducing emulsion breaking particles, and the gaps formed between the particles are also suitable for rapid passage of water, but when the diameter of the aggregation-inducing emulsion breaking particles is too larger than that of the ceramic particles, for example, the diameter ratio of the aggregation-inducing emulsion breaking particles and the ceramic particles in the fifth connection chamber is too small, emulsion breaking oil droplets which are not favorable for aggregation pass through the connection chamber, and the ceramic particles are too much wrapped around the aggregation-inducing particles, the gaps between the particles become small, which is not favorable for the treatment of wastewater. Meanwhile, when the diameter of the aggregation-induced emulsion breaking particles is smaller than that of the ceramic particles, although a certain emulsion breaking effect is achieved, the effect is also inferior to that of the first connecting cavity, the second connecting cavity and the third connecting cavity, when the ceramic particles are large, the aggregation-induced emulsion breaking particles are easy to deform in a long-term use state, secondly, the large ceramic particles accelerate the passing of water and oil, and the collision probability and frequency are reduced, so that when the diameter ratio of the aggregation-induced emulsion breaking particles to the ceramic particles is in a range of 1.2-0.5, the optimal emulsion breaking effect is achieved.
Example 4
On the basis of the embodiment, the connecting frame is fixedly connected with the reaction cavity through threads, and after the connecting frame is fixed, the tripod on the connecting frame is erected on the ground to support the reaction cavity; the connection chamber is connected to the connection opening 18 of the second connection valve, and the fourth connection valve 12 is connected to the first connection valve 13.
2, the wastewater subjected to demulsification treatment in the step 2 enters the reaction cavity 2 through the upper end of the connecting cavity, a flocculating agent is introduced into the reaction cavity 2, meanwhile, the motor controls the rotating rod 16 and the stirring sheet 17 on the rotating rod to rotate, the wastewater and the flocculating agent are uniformly mixed in the reaction cavity, and the flocculating agent is used for flocculating treatment of the wastewater;
the wastewater after the flocculation treatment in the step 3 enters a lower inner cavity 11 in a filter cavity 3 through a reaction cavity 2, water enters a lower outer cavity through oil-water separation membranes on a first partition plate and a second partition plate, the oil is positioned in the lower inner cavity 11 and an upper cavity 10,
and step 4, discharging oil through the first oil outlet 8, and discharging water through the water outlet 20 on the lower outer cavity.
Waste water carries out filtration treatment from the bottom up in connecting the intracavity, aggregation induction emulsion breaking granule and ceramic particle in the connecting chamber carry out the emulsion breaking to it and handle, waste water after the processing gets into the reaction chamber through connecting the chamber, waste water and flocculating agent reaction in the reaction chamber, carry out flocculation treatment, waste water after the flocculation treatment gets into the lower inner chamber in the filter chamber through the reaction chamber, waste water filters through the filter chamber and makes water get into under in the exocoel, oil drips the gathering in epicoele and lower inner chamber, discharge oil through first oil-out 8 on epicoele 10 at last.
As used herein, "first," "second," "third," "fourth," "fifth," etc. merely distinguish the corresponding components for clarity of description and are not intended to limit any order or to emphasize importance, etc. Further, the term "connected" used herein may be either directly connected or indirectly connected via other components without being particularly described.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Oily waste water separation filter equipment, its characterized in that includes emulsion breaking chamber (1), reaction chamber (2) and filter chamber (3) that from the bottom up can dismantle the connection in proper order, and emulsion breaking chamber (1) intussuseption is filled with the emulsion breaking filler, is provided with the feed inlet that is used for letting in the flocculating agent on reaction chamber (2), is provided with first division board in filter chamber (3), first division board divide into epicoele (10) and lower chamber with filter chamber (3), is provided with the second division board in the lower chamber, and the second division board divide into lower inner chamber (11) and lower exocoel with the lower chamber from inside to outside, and inner chamber (11), epicoele (10), reaction chamber (2) inside intercommunication down, all is provided with the oil water separating membrane on first division board and the second division board, and oil water separating membrane makes water get into lower exocoele, and the oil level is in lower inner chamber (11), epicoele (10), and waste water gets into reaction chamber (2), filter chamber (3) in proper order through emulsion breaking chamber (1).
2. The oily wastewater separating and filtering device according to claim 1, characterized in that the upper chamber (10) is provided with a first oil outlet (8).
3. The oily wastewater separation and filtration device of claim 1, wherein the first partition plate is at an angle to the horizontal.
4. The oily wastewater separation and filtration device according to claim 1, wherein the lower end face of the reaction chamber (2) is provided with a plurality of connecting holes (18) detachably connected with the demulsification chamber (1), the reaction chamber (2) is internally provided with a rotating rod (16), the rotating rod (16) is provided with a plurality of stirring blades (17), the lower end of the rotating rod (16) penetrates through the lower end of the reaction chamber (2) to be connected with the rotating plate (15), and the rotating plate (15) is connected with the motor.
5. The oily wastewater separation and filtration device according to claim 1, wherein the demulsification chamber (1) comprises a plurality of connection chambers, the upper ends of the connection chambers are detachably connected with the lower end surface of the reaction chamber (2), after connection, the interiors of the connection chambers are communicated with the interior of the reaction chamber (2), and aggregation-inducing demulsification particles and ceramic particles are placed in the connection chambers.
6. The oily wastewater separating and filtering device as claimed in claim 1, wherein the outer side of the reaction chamber (2) is detachably connected with a connecting frame (4), and the connecting frame (4) is provided with a tripod (5).
7. The method for separating and filtering oil-containing wastewater, which comprises the separation and filtration apparatus according to any one of claims 1 to 6, wherein the separation and filtration method comprises the steps of:
step 1, introducing the oily wastewater into a demulsification cavity (1), and performing demulsification treatment on the oily wastewater by aggregation-induced demulsification particles and ceramic particles in the demulsification cavity (1);
step 2, the wastewater after the demulsification treatment enters a reaction cavity (2) through a demulsification cavity (1), a flocculating agent is introduced into the reaction cavity (2), and the flocculating agent is used for flocculating the wastewater;
3, enabling the flocculated wastewater to enter a filter chamber (3) through a reaction chamber (2), enabling water to enter a lower outer chamber through an oil-water separation membrane in the filter chamber (3), and enabling the water to be located in the lower inner chamber (11) and an upper chamber (10);
and 4, discharging oil through the first oil outlet (8), and discharging water through a water outlet (20) on the lower outer cavity.
8. The method for separating and filtering oil-containing wastewater according to claim 7, wherein the ratio of the diameters of the aggregation-inducing demulsifying particles and the ceramic particles is 1.
9. The method for separating and filtering oil-containing wastewater according to claim 7, wherein the oil-water separation membrane is a separation membrane having a PVDF membrane as a mesh membrane skeleton and a hydrogel as a surface membrane.
10. The method for separating and filtering oily wastewater according to claim 7, wherein in the step 2, after the flocculating agent is introduced into the reaction chamber (2), the rotating plate (15) drives the rotating rod (16) and the stirring sheet (17) thereon to rotate.
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