CN114146453A - Oily wastewater treatment method and device based on aggregation-induced demulsification - Google Patents
Oily wastewater treatment method and device based on aggregation-induced demulsification Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D17/02—Separation of non-miscible liquids
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
Abstract
The invention discloses an oily wastewater treatment method and device based on aggregation-induced emulsion breaking, which mainly aim at the treatment of oily emulsion wastewater. The special-shaped filter element has the advantages of high demulsification efficiency by a physical method, no secondary pollution, resource utilization of oil products in wastewater, more superiority than the traditional filling filter element, and higher integration level of an integrated vertical device.
Description
Technical Field
The invention relates to the technical field of oil-water separation, in particular to a method and a device for treating oily wastewater based on aggregation induction demulsification, which mainly aim at the deep purification treatment of emulsified oil and have wide application range and can be used for treating the oily wastewater in the industries of oil and gas exploitation, petrochemistry, coal chemical industry, machining and the like.
Background
Oily wastewater is widely sourced from many industrial processes and activities, and further, the simple and efficient separation of oily wastewater is a hot issue which is always concerned by researchers in the field. The separation requirement of various emulsified oils (0.1-10 μm) in actual production and life is more urgent but the separation difficulty is larger. The currently common separation methods for emulsified oil are mainly classified into the following three types, chemical methods, biological methods and physical methods, according to different treatment principles. Wherein, the chemical method can produce waste sludge to cause secondary pollution to the environment, and finally can not recover oil and can cause the problem of resource waste, etc., and the biological method depends on the microbial activity and has higher requirement on the concentration of pollutants in the water body, and the treatment period is long and the effect is unstable. There are natural advantages to the physical method in comparison, it is environmentally friendly and it does not require addition of pharmaceutical agents.
Therefore, the Chinese patent with the publication number of CN106422420B discloses a horizontal oil-water phase separator. The equipment mainly comprises a flow stabilizing part, a coalescence part and a gravity settling area. The flow stabilizing part comprises a feeding component and an anti-rotation baffle. The feeding component is positioned at the vertical position of the head of the tank body, which is beneficial to uniform distribution of inlet water. In addition, the Chinese patent of the invention with the publication number of CN101972559A discloses an oil-water separation device and an oil-water separation method, wherein a horizontal coalescence oil-water separator is adopted, stainless steel corrugated plate packing and polypropylene wire mesh corrugated packing are adopted, and an additional air floatation and cyclone device is arranged to assist oil-water separation. Utility model patent publication No. CN213313490U discloses a vertical oil water separator convenient to wash, but it has the single integrated level of structure not high, the poor problem of separation precision. Chinese patent publication No. CN108658172A discloses a vertical oil-water separation device, which only uses a coalescing assembly to separate oil from water based on the gravity settling principle.
According to the technical scheme, although the internal structure and the auxiliary components of the equipment are improved and optimized, the equipment structure is horizontal, and the auxiliary components and the gravity settling area cause the equipment to be large in size and cannot be suitable for space-limited places such as offshore oil and gas platforms. The existing vertical equipment has the problem of low integration level, in addition, in the scheme, the coalescence material adopts a hard stainless steel corrugated plate or other metal wire mesh fillers, and the final separation precision of the equipment is low.
Therefore, it is necessary to develop a method and a device for treating oily wastewater based on aggregation-induced demulsification, so as to form equipment which has high integration level and compact structure and can simply and efficiently separate oily emulsion wastewater by only a physical mode, deeply purify the oily wastewater by an environment-friendly treatment mode, and finally apply the equipment and the method to actual production and life.
Disclosure of Invention
The invention aims to provide a method and a device for treating oily wastewater based on aggregation induction demulsification based on the actual requirement of green treatment of high-emulsification oily wastewater, the method mainly aims at the treatment of wastewater containing heavy oil or light oil emulsion, and the related device comprises a liquid inlet, a water distributor, a liquid inlet cavity, a special-shaped filter element, a mesh bottom plate, aggregation-induced demulsification filler, an inclined plane special-shaped end, an internal oil collecting pipeline, an oil collecting bag, a corrugated inclined plate layer, a super-hydrophilic-oleophobic filter element, a water outlet, an oil discharge valve, a pressure gauge, a lifting hand wheel buckle type connecting piece, a limiting piece and a sealing flat gasket. The special-shaped filter element has the advantages of high demulsification efficiency by a physical method, no secondary pollution, resource utilization of oil products in wastewater, more superiority than the traditional filling filter element, and higher integration level of an integrated vertical device.
The invention relates to an oily wastewater treatment method based on aggregation-induced demulsification, which comprises heavy oil or light oil, wherein the device comprises a liquid inlet (1), a water distributor (2), a liquid inlet cavity (3), a special-shaped filter element (4), a mesh bottom plate (5), aggregation-induced demulsification fillers (6), an inclined plane special-shaped end (7), an internal oil collecting pipeline (8), an oil collecting bag (9), a corrugated inclined plate layer (10), a super-hydrophilic-oleophobic filter element (11), a water outlet (12), an oil outlet (13), an oil discharge valve (14), a first pressure gauge (15a), a second pressure gauge (15b), a third pressure gauge (15c), a lifting hand wheel (16), a first buckle type connecting piece (17a), a second buckle type connecting piece (17b), a third buckle type connecting piece (17c) and a limiting piece (18), the device comprises supporting legs (19) and a sealing flat gasket (20), wherein a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) are respectively arranged in the device for treating heavy oil, the upper end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the upper end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the lower end of the special-shaped filter element (4) is connected with an oil collection bag (9) through a first buckle type connecting piece (17a), a liquid inlet cavity (3) is arranged in the oil collection bag (9), a water distributor (2) connected with a liquid inlet (1) is arranged in the liquid inlet cavity (3), the bottom of the oil collection bag (9) is provided with an oil outlet (13), a mesh bottom plate (5) is fixed at the lower end of the special-shaped filter element (4), the upper end of the filter element (4) is an inclined plane special-shaped end (7), be equipped with in special-shaped filter core (4) respectively and be filled with aggregation induction breakdown of emulsion filler (6), inside oil collecting pipeline (8) pass special-shaped filter core (4) and lead to oil collection package (9), pass through third buckle formula connecting piece (17c) and be equipped with delivery port (12), third manometer (15c) and lifting hand wheel (16) respectively on the top of super hydrophilic-oleophobic filter core (11) and be connected, concrete operation is according to following step and is gone on:
a. under the condition that the first buckle type connecting piece (17a), the second buckle type connecting piece (17b) and the third buckle type connecting piece (17c) are well sealed, the liquid inlet (1) and the water outlet (12) are adjusted to be in an open state, an oil discharge valve (14) at the bottom end is closed, heavy oil-containing wastewater to be treated is led in from the liquid inlet (1) by means of external power and uniformly dispersed into the liquid inlet cavity (3) through a mesh plate of the water distributor (2), and a pressure gauge (15a) is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity (3) enters the special-shaped filter element (4) through the mesh bottom plate (5), when oily wastewater contacts the aggregation induction demulsification filler (6) in the special-shaped filter element (4), small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined plane special-shaped end (7) along with the water phase, and at the moment, heavy large oil drops flow into the oil collection bag (9) through the internal oil collection pipeline (8) under the action of gravity to be collected;
c. the large oil drops and the small oil drops which do not settle in time in the step b continuously move upwards along the hydraulic direction along with the water phase, when the large oil drops pass through the inclined layer (10) of the corrugated plate, the large oil drops which do not settle in time are further strengthened to settle, and the water phase and the small oil drops penetrate out of the inclined layer (10) of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer (10) contact the outer surface of the super-hydrophilic-oleophobic filter element (11) in the step c, the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element (11), then the water phase is discharged from the opened water outlet (12), the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element (11), the oil droplets are finally gathered and enlarged due to the fact that the quantity of the intercepted oil droplets is continuously increased and the mutual collision frequency is increased, the oil droplets enter the oil collecting bag (9) through the internal oil collecting pipeline (8), and the oil discharging valve (14) is controlled to open the oil discharging port (13) to be discharged;
the device for treating the light oil is internally provided with a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) respectively, the lower end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the lower end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the upper end of the special-shaped filter element (4) is connected with an oil collecting bag (9) through a first buckle type connecting piece (17a), a liquid inlet cavity (3) is arranged in the oil collecting bag (9), a water distributor (2) connected with a liquid inlet (1) is arranged in the liquid inlet cavity (3), the top of the oil collecting bag (9) is provided with an oil discharge port (13), the upper end of the special-shaped filter element (4) is fixed by a mesh bottom plate (5), the lower end of the special-shaped filter element (4) is a special-shaped inclined surface end (7), and aggregation inducing demulsification fillers (6) are respectively filled in the filter element (4), inside oil collecting pipeline (8) pass through special-shaped filter core (4) and lead to oil collection package (9), pass through third buckle formula connecting piece (17c) and be connected with the base that is equipped with delivery port (12), third manometer (15c) and landing leg (19) respectively in the bottom of super hydrophilic-oleophobic filter core (11), and concrete operation is according to following step and is gone on:
a. under the condition that the first buckle type connecting piece (17a), the second buckle type connecting piece (17b) and the third buckle type connecting piece (17c) are well sealed, the liquid inlet (1) and the water outlet (12) are adjusted to be in an open state, an oil discharge valve (14) at the top end is closed, heavy oil-containing wastewater to be treated is led in from the liquid inlet (1) by means of external power and uniformly dispersed into the liquid inlet cavity (3) through a mesh plate of the water distributor (2), and a pressure gauge (15a) is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity (3) enters the special-shaped filter element (4) through the mesh bottom plate (5), when oily wastewater contacts the aggregation induction demulsification filler (6) in the special-shaped filter element (4), small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined plane special-shaped end (7) along with the water phase, and at the moment, light large oil drops flow into the oil collecting bag (9) through the internal oil collecting pipeline (8) under the action of buoyancy force to be collected;
c. the large oil drops and the small oil drops which do not rise in time in the step b continuously move downwards along the hydraulic direction along with the water phase, when the large oil drops pass through the inclined layer (10) of the corrugated plate, the large oil drops which do not collect in time are further strengthened to rise, and the water phase and the small oil drops penetrate out of the inclined layer (10) of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer (10) in the step c contact the outer surface of the super-hydrophilic-oleophobic filter element (11), the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element (11), and then the water phase is discharged from the opened water outlet (12), the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element (11), the oil droplets are increased in quantity and the mutual collision frequency is increased after the oil droplets are intercepted, the oil droplets are finally gathered and enlarged, the oil droplets enter the oil collecting bag (9) through the internal oil collecting pipeline (8), and the oil discharge valve (14) is controlled to open the oil discharge port (13) to discharge the oil.
The utility model provides an oily waste water treatment facilities based on induced breakdown of emulsion of gathering, the device is including handling heavy oil device or handling light oil device, it is by inlet (1) to handle heavy oil device, water-locator (2), feed liquor chamber (3), special-shaped filter core (4), mesh bottom plate (5), the induced breakdown of emulsion of gathering packs (6), inclined plane dysmorphism end (7), inside oil collecting pipeline (8), oil collecting bag (9), ripple inclined plate layer (10), super hydrophilic-oleophobic filter core (11), delivery port (12), oil drain port (13), oil drain valve (14), first manometer (15a), second manometer (15b), third manometer (15c), lifting hand wheel (16), first buckle formula connecting piece (17a), second buckle formula connecting piece (17b), third buckle formula connecting piece (17c), locating part (18), landing leg (19), a sealing flat pad (20), a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) are respectively arranged in the device, the upper end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the upper end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the lower end of the special-shaped filter element (4) is connected with an oil collecting bag (9) through a first buckle type connecting piece (17a), the lower end of the special-shaped filter element (4) is fixedly provided with a mesh bottom plate (5), the upper end of the special-shaped filter element (4) is a detachable inclined plane special-shaped end (7), the top end of the super-hydrophilic-oleophobic filter element (11) is connected with a top cover which is respectively provided with a water outlet (12), a third pressure gauge (15c) and a lifting hand wheel (16) through a third buckle type connecting piece (17c), an oil drain port (13) at the bottom of the device is connected with an oil collecting bag (9);
the device for treating the light oil is composed of a liquid inlet (1), a water distributor (2), a liquid inlet cavity (3), a special-shaped filter element (4), a mesh bottom plate (5), aggregation-induced demulsification filler (6), an inclined plane special-shaped end (7), an internal oil collecting pipeline (8), an oil collecting bag (9), a corrugated inclined plate layer (10), a super-hydrophilic-oleophobic filter element (11), a water outlet (12), an oil outlet (13), an oil discharge valve (14), a first pressure gauge (15a), a second pressure gauge (15b), a third pressure gauge (15c), a lifting hand wheel (16), a first buckle type connecting piece (17a), a second buckle type connecting piece (17b), a third buckle type connecting piece (17c), a limiting piece (18), supporting legs (19) and a sealing flat cushion (20), wherein the super-hydrophilic-oleophobic filter element (11), the corrugated inclined plate layer (10) and the super-hydrophilic-oleophobic filter element (11) are arranged in the device respectively, Dysmorphism filter core (4), pass through second buckle formula connecting piece (17b) and be connected with ripple inclined plate layer (10) at the lower extreme of dysmorphism filter core (4), the lower extreme of ripple inclined plate layer (10) is equipped with super hydrophilic-oleophobic filter core (11), be connected with album oil package (9) through first buckle formula connecting piece (17a) in the upper end of dysmorphism filter core (4), dysmorphism filter core (4) upper end fixed mesh bottom plate (5), the lower extreme of dysmorphism filter core (4) is detachable inclined plane dysmorphism end (7), pass through third buckle formula connecting piece (17c) and be equipped with delivery port (12) respectively in the bottom of super hydrophilic-oleophobic filter core (11), the base of third manometer (15c) is connected, oil drain (13) at the device top is connected with album oil package (9).
The bottom of the corrugated inclined plate layer (10) is provided with a limiting part (18), the outer wall of the corrugated inclined plate layer (10) is provided with a second pressure gauge (15b), the height of the corrugated plate inclined layer (10) is 10-20cm, the distance between adjacent inclined plates in the corrugated plate inclined layer (10) is 2-8mm, and the included angle between each inclined plate and the horizontal direction is 40-80 degrees.
The aperture of the mesh bottom plate (5) is 0.3-10mm, the thickness is 3-10mm, the included angle between the inclined plane special-shaped end (7) and the horizontal plane is 5-10 degrees, the thickness is 3-10mm, aggregation induction demulsification fillers (6) are respectively arranged in the special-shaped filter element (4), and an internal oil collecting pipeline (8) passes through the special-shaped filter element (4) and is directly communicated with an oil collecting bag (9).
A liquid inlet cavity (3) is arranged in the oil collecting bag (9), the oil collecting bag (9) is adjacent to the liquid inlet cavity (3) but not communicated with the liquid inlet cavity, a water distributor (2) is arranged in the liquid inlet cavity (3), the liquid inlet (1) is connected with the water distributor (2), and a first pressure gauge (15a) is arranged on the outer wall of the oil collecting bag (9).
According to the method and the device for treating the oily wastewater based on aggregation induction demulsification, industrial wastewater is pumped from a water inlet to pass through a water distributor, so that the oily wastewater uniformly enters a special-shaped filter element, a demulsification filler in the special-shaped filter element has oleophylic and hydrophobic characteristics, and the material is in a porous structure and has high oil absorption multiplying power; when the oily wastewater passes through the special-shaped filter element, due to the oleophylic property of the surface of the material, small oil drops are firstly wetted and attached on the surface of the material, and then other flowing oil drops are further attached on the surface of the material or collide and coalesce with the previously adsorbed oil drops; the oil drops continuously adhere, coalesce and grow up with the continuous pumping of the oily wastewater, and when the oil drops coalesce to be large enough, the oil drops are separated from the aggregation inducing demulsification filler under the action of fluid drag force and gravity or buoyancy; at the moment, the coalesced liquid passes through the strengthened and separated corrugated plate inclined layer to accelerate the sedimentation/rising process of large-particle oil drops. Part of the small oil drops which are not completely separated pass through the super-hydrophilic-oleophobic separation filter element, and the small oil drops are effectively isolated from collision and coalescence and then automatically settled/floated, so that the oil-containing emulsion is separated in a pure physical mode at high precision.
The special-shaped filter element (4), the corrugated inclined plate layer (10) and the super-hydrophilic-oleophobic filter element (11) in the device are of a structure convenient to disassemble and assemble, the effective filtering area can be maximized by utilizing the special-shaped filter element (4), and the internal aggregation induction demulsification filler (6) can be integrally disassembled, assembled and maintained; the inclined plane special-shaped end (7) is a detachable inclined plane special-shaped end (7), the included angle between the inclined plane of the special-shaped filter element and the horizontal plane is 5-10 degrees, the thickness is 3-10mm, large granular oil drops after coalescence can enter an oil collecting bag (9) through an internal oil collecting pipeline (8), the oil collecting efficiency and the separation efficiency are improved, the filter element is a full-life filter element member which can be repeatedly used, the height of a corrugated plate inclined layer (10) is 10-20cm, the distance between adjacent inclined plates in the corrugated plate inclined layer (10) is 2-8mm, the included angle between the inclined plates and the horizontal direction is 40-80 degrees, the separation speed and the separation effect of the large granular oil drops after coalescence are improved by utilizing the structure of a multilayer plate of the corrugated plate inclined layer (10), the working load of the super-hydrophilic and oleophobic separation filter element (11) is reduced, the oil drops can be rapidly collected, and the length of a settling section is reduced, so that the whole volume of the filter element is reduced, the overall manufacturing cost of the equipment is reduced; the super-hydrophilic-oleophobic filter element (11) is an external-in and internal-out multilayer wound filter element, and efficiently separates oil drops with the particle size of less than 10 mu m. Further intercepting oil drops, and enabling the intercepted oil drops to collide with each other again, aggregate and enlarge to realize secondary aggregation and settlement
Compared with the existing horizontal equipment, the oily wastewater treatment method and device based on aggregation-induced demulsification have the advantages that the vertical device is provided with the settling space, so that the floor area of equipment is greatly reduced; the special-shaped filter element (4), the corrugated inclined plate layer (10) and the super-hydrophilic-oleophobic filter element (11) are integrated in the whole device, so that different functions are realized, the whole structure is highly compact, the number of devices in an oil-water separation process is greatly reduced, and the manufacturing cost and the running cost of the devices are reduced while the oil-water separation efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an oily (heavy) wastewater treatment device based on aggregation-induced demulsification;
FIG. 2 is a schematic diagram of the overall structure of an oil-containing (light) wastewater treatment device based on aggregation-induced demulsification;
FIG. 3a is a general schematic view of a special-shaped filter element structure;
FIG. 3b is a schematic cross-sectional view of a special-shaped filter element structure;
FIG. 3c is a schematic top view of a shaped filter element configuration;
FIG. 4a is a top view of a superhydrophilic-oleophobic filter cartridge;
FIG. 4b is a schematic diagram of a super-hydrophilic-oleophobic filter element structure.
In the figure, 1-liquid inlet, 2-water distributor, 3-liquid inlet cavity, 4-special-shaped filter element, 5-mesh bottom plate, 6-aggregation induction demulsification filler, 7-inclined plane special-shaped end, 8-internal oil collecting pipeline, 9-oil collecting bag, 10-corrugated inclined plate layer, 11-super-hydrophilic-oleophobic filter element, 12-water outlet, 13-oil outlet, 14-oil discharge valve, 15-pressure gauge, 16-lifting hand wheel, 17-snap-in type quick assembly, 18-limiting piece, 19-supporting leg and 20-sealing flat gasket.
Detailed Description
The invention is explained in further detail below with reference to the drawing. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention discloses an oily wastewater treatment method and device based on aggregation-induced demulsification, which can respectively separate and purify heavy oily emulsion wastewater and light oily emulsion wastewater.
Example 1
The invention relates to an oil-containing wastewater treatment method based on aggregation-induced demulsification, which relates to a heavy oil treatment device and comprises a liquid inlet 1, a water distributor 2, a liquid inlet cavity 3, a special-shaped filter element 4, a mesh bottom plate 5, aggregation-induced demulsification filler 6, an inclined plane special-shaped end 7, an internal oil collecting pipeline 8, an oil collecting bag 9, a corrugated inclined plate layer 10, a super-hydrophilic-oleophobic filter element 11, a water outlet 12, an oil outlet 13, an oil discharge valve 14, a first pressure gauge 15a, a second pressure gauge 15b, a third pressure gauge 15c, a lifting hand wheel 16, a first buckle type connecting piece 17a, a second buckle type connecting piece 17b, a third buckle type connecting piece 17c, a limiting piece 18, a supporting leg 19 and a sealing flat pad 20, wherein the super-hydrophilic-oleophobic filter element 11, the corrugated inclined plate layer 10 and the special-shaped filter element 4 are respectively arranged in the device, and the upper end of the filter element 4 is connected with the corrugated inclined plate layer 10 through the second buckle type connecting piece 17b, the upper end of the ripple inclined plate layer 10 is provided with a super-hydrophilic-oleophobic filter element 11, the lower end of the special-shaped filter element 4 is connected with an oil collecting bag 9 through a first buckle type connecting piece 17a, a liquid inlet cavity 3 is arranged in the oil collecting bag 9, a water distributor 2 connected with a liquid inlet 1 is arranged in the liquid inlet cavity 3, the bottom of the oil collecting bag 9 is provided with an oil outlet 13, the lower end of the special-shaped filter element 4 is fixed by a mesh bottom plate 5, the upper end of the special-shaped filter element 4 is an inclined plane special-shaped end 7, aggregation inducing demulsification fillers 6 are respectively arranged in the special-shaped filter element 4, an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 and directly passes through the oil collecting bag 9, the top end of the super-hydrophilic-oleophobic filter element 11 is connected with a top cover respectively provided with a water outlet 12, a third pressure gauge 15c and a lifting hand wheel 16 through a third buckle type connecting piece 17c, and the concrete operation is carried out according to the following steps:
a. under the condition of ensuring that the first buckle type connecting piece 17a, the second buckle type connecting piece 17b and the third buckle type connecting piece 17c are well sealed, the liquid inlet 1 and the water outlet 12 are adjusted to be in an open state, the oil drain valve 14 is closed, heavy oil-containing wastewater to be treated is led in from the liquid inlet 1 by virtue of external power, and is uniformly dispersed into the liquid inlet cavity 3 through a mesh plate of the water distributor 2, and the pressure gauge 15a is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity 3 enters the special-shaped filter element 4 through the mesh bottom plate 5, when oil-containing wastewater contacts the aggregation induction demulsification filler 6 in the special-shaped filter element 4, small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined special-shaped end 7 along with the water phase, and at the moment, heavy large oil drops flow into the oil collecting bag 9 through the internal oil collecting pipeline 8 under the action of gravity to be collected;
c. d, continuously moving the large oil drops and the small oil drops which are not settled in time in the step b upwards along the hydraulic direction along with the water phase, further strengthening the settlement of the large oil drops which are not settled in time when the large oil drops pass through the inclined layer 10 of the corrugated plate, and enabling the water phase and the small oil drops to penetrate out of the inclined layer 10 of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer 10 in the step c contact the outer surface of the super-hydrophilic-oleophobic filter element 11, the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element 11 and is then discharged from the opened water outlet 12, the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element 11, as the quantity of the oil droplets after interception is continuously increased, the mutual collision frequency is increased, the oil droplets are finally aggregated and enlarged, the oil droplets enter the oil collecting bag 9 through the internal oil collecting pipeline 8, and the oil discharge valve 14 is opened and controlled to be discharged from the oil discharge port 13;
when the device is in a shutdown state, the water outlet 12 and the oil discharge port 13 need to be opened simultaneously to smoothly discharge oil, so that incomplete oil discharge caused by negative pressure formed inside equipment is avoided;
the device needs to be subjected to back flushing operation after running for a period of time due to the influence of inevitable impurities, at the moment, an oil discharge port 13 needs to be ensured to be in a closed state, a liquid inlet 1 and a water outlet 12 are kept in an open state, previously treated clean water is introduced from the water outlet 12 through external power, the index of a pressure gauge 15c is controlled to be 0.2-0.6MPa, the super-hydrophilic and oleophobic filter element 11, the corrugated plate inclined layer 10 and the special-shaped filter element 4 are sequentially flushed, the total time is controlled to be 10-20min, finally, cleaned dirty water is discharged from the liquid inlet 1, and the back flushing operation is finished.
Example 2
The invention relates to an oily wastewater treatment method based on aggregation-induced demulsification, which relates to a light oil treatment device and consists of a liquid inlet 1, a water distributor 2, a liquid inlet cavity 3, a special-shaped filter element 4, a mesh bottom plate 5, aggregation-induced demulsification filler 6, an inclined plane special-shaped end 7, an internal oil collecting pipeline 8, an oil collecting bag 9, a corrugated inclined plate layer 10, a super-hydrophilic-oleophobic filter element 11, a water outlet 12, an oil outlet 13, an oil discharge valve 14, a first pressure gauge 15a, a second pressure gauge 15b, a third pressure gauge 15c, a lifting hand wheel 16, a first buckling type connecting piece 17a, a second buckling type connecting piece 17b, a third buckling type connecting piece 17c, a limiting piece 18, a supporting leg 19 and a sealing flat pad 20, wherein the super-hydrophilic-oleophobic filter element 11, the corrugated inclined plate layer 10 and the special-shaped filter element 4 are respectively arranged in the device, the lower end of the filter element 4 is connected with the corrugated inclined plate layer 10 through the second buckling type connecting piece 17b, the lower end of the corrugated inclined plate layer 10 is provided with a super-hydrophilic-oleophobic filter element 11, the upper end of the special-shaped filter element 4 is connected with an oil collecting bag 9 through a first buckle type connecting piece 17a, a liquid inlet cavity 3 is arranged in the oil collecting bag 9, a water distributor 2 connected with a liquid inlet 1 is arranged in the liquid inlet cavity 3, the top end of the oil collecting bag 9 is provided with an oil outlet 13, the upper end of the special-shaped filter element 4 is fixed by a mesh bottom plate 5, the lower end of the special-shaped filter element 4 is an inclined plane special-shaped end 7, aggregation inducing demulsification fillers 6 are respectively arranged in the special-shaped filter element 4, an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 and directly passes through the oil collecting bag 9, the bottom of the super-hydrophilic-oleophobic filter element 11 is connected with a base respectively provided with a water outlet 12 and a third pressure gauge 15c through a third buckle type connecting piece 17c, and the concrete operation is carried out according to the following steps:
a. under the condition of ensuring that the first buckle type connecting piece 17a, the second buckle type connecting piece 17b and the third buckle type connecting piece 17c are well sealed, the liquid inlet 1 and the water outlet 12 are adjusted to be in an open state, the oil drain valve 14 is closed, the light oil-containing wastewater to be treated is led in from the liquid inlet 1 by virtue of external power, and is uniformly dispersed into the liquid inlet cavity 3 through a mesh plate of the water distributor 2, and the pressure gauge 15a is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity 3 enters the special-shaped filter element 4 through the mesh bottom plate 5, when oil-containing wastewater contacts the aggregation induction demulsification filler 6 in the special-shaped filter element 4, small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined special-shaped end 7 along with the water phase, and at the moment, light large oil drops flow into the oil collecting bag 9 through the internal oil collecting pipeline 8 under the action of buoyancy for collection;
c. the large oil drops and the small oil drops which do not rise in time in the step b continuously move downwards along the hydraulic direction along with the water phase, when the large oil drops pass through the inclined layer 10 of the corrugated plate, the large oil drops are further strengthened to rise, and the water phase and the small oil drops penetrate out of the inclined layer 10 of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer 10 contact the outer surface of the super-hydrophilic-oleophobic filter element 11 in the step c, the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element 11 and is then discharged from the opened water outlet 12, the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element 11, as the quantity of the intercepted oil droplets is continuously increased, the mutual collision frequency is increased, the oil droplets are finally aggregated and enlarged, the oil droplets enter the oil collecting bag 9 through the internal oil collecting pipeline 8, and the oil discharge valve 14 is opened and controlled to be discharged from the oil discharge port 13;
the device needs to be subjected to back washing operation due to the influence of inevitable impurities after running for a period of time, at the moment, an oil discharge port 13 needs to be ensured to be in a closed state, a liquid inlet 1 and a water outlet 12 are kept in an open state, previously treated clean water is introduced from the water outlet 12 through external power, the index of a pressure gauge 15c is controlled to be 0.2-0.6MPa, the super-hydrophilic-oleophobic filter element 11, the corrugated plate inclined layer 10 and the special-shaped filter element 4 are washed sequentially from bottom to top, the total time is controlled to be 10-20min, finally, cleaned dirty water is discharged from the liquid inlet 1, and the back washing operation is finished.
Example 3
The invention relates to an oily wastewater treatment device based on aggregation induction demulsification, which is a heavy oil treatment device shown in figure 1 and comprises a liquid inlet 1, a water distributor 2, a liquid inlet cavity 3, a special-shaped filter element 4, a mesh bottom plate 5, an aggregation induction demulsification filler 6, an inclined plane special-shaped end 7, an internal oil collecting pipeline 8, an oil collecting bag 9, a corrugated inclined plate layer 10, a super-hydrophilic-oleophobic filter element 11, a water outlet 12, an oil outlet 13, an oil discharge valve 14, a first pressure gauge 15a, a second pressure gauge 15b, a third pressure gauge 15c, a lifting hand wheel 16, a first buckling type connecting piece 17a, a second buckling type connecting piece 17b, a third buckling type connecting piece 17c, a limiting piece 18, a supporting leg 19 and a sealing flat pad 20, wherein the super-hydrophilic-oleophobic filter element 11, the corrugated inclined plate layer 10 and the filter element 4 are respectively arranged in the device, the upper end of the filter element 4 is connected with the corrugated inclined plate layer 10 through the second buckling type connecting piece 17b, the upper end of the corrugated inclined plate layer 10 is provided with a super-hydrophilic-oleophobic filter element 11, the lower end of the special-shaped filter element 4 is connected with an oil collecting bag 9 through a first buckle type connecting piece 17a, the lower end of the special-shaped filter element 4 is fixed with a mesh bottom plate 5, the upper end of the special-shaped filter element 4 is a detachable inclined plane special-shaped end 7, the top end of the super-hydrophilic-oleophobic filter element 11 is connected with a top cover which is respectively provided with a water outlet 12, a third pressure gauge 15c and a lifting hand wheel 16 through a third buckle type connecting piece 17c, and an oil outlet 13 at the bottom of the device is connected with the oil collecting bag 9;
the bottom of the corrugated inclined plate layer 10 is provided with a limiting piece 18, the outer wall of the corrugated inclined plate layer 10 is provided with a second pressure gauge 15b, the height of the corrugated plate inclined layer 10 is 10-20cm, the distance between adjacent inclined plates in the corrugated plate inclined layer 10 is 2-8mm, and the included angle between each inclined plate and the horizontal direction is 40-80 degrees;
the aperture of the mesh bottom plate 5 is 0.3-10mm, the thickness is 3-10mm, the included angle between the inclined plane special-shaped end 7 and the horizontal plane is 5-10 degrees, the thickness is 3-10mm, aggregation induction demulsification fillers 6 are respectively arranged in the special-shaped filter element 4, and an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 and is communicated with an oil collecting bag 9;
a liquid inlet cavity 3 is arranged in the oil collection bag 9, the oil collection bag 9 is adjacent to the liquid inlet cavity 3 but not communicated with the liquid inlet cavity 3, a water distributor 2 is arranged in the liquid inlet cavity 3, a liquid inlet 1 is connected with the water distributor 2, and a first pressure gauge 15a is arranged on the outer wall of the oil collection bag 9;
as shown in fig. 1, a liquid inlet 1 is connected with a water distributor 2, the water distributor 2 is arranged inside a liquid inlet cavity 3, the liquid inlet cavity 3 is communicated with the lower end of a special-shaped filter element 4, the lower end of the special-shaped filter element 4 is a mesh bottom plate 5 which is fixedly welded, aggregation-induced demulsification filler 6 is filled inside the special-shaped filter element 4, the aggregation-induced demulsification filler 6 can be replaced after a detachable inclined special-shaped end 7 is opened, an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 and directly passes through an oil collecting bag 9, an oil outlet 13 is arranged at the bottom end of the oil collecting bag 9, a corrugated inclined plate layer 10 is arranged at the upper end of the special-shaped filter element 4, a super-hydrophilic-oleophobic filter element 11 is arranged at the upper end of the corrugated inclined plate layer 10, and a water outlet 12 is arranged at the top end of the device;
in the first stage, oily wastewater enters the water distributor 2 through the liquid inlet 1, so that liquid is dispersed in the liquid inlet cavity 3 to ensure more uniform initial distribution, the utilization rate of the special-shaped filter element 4 is increased, and the possibility of local scaling and liquid channeling is reduced; the oil-containing wastewater which is uniformly distributed enters from a mesh bottom plate 5 at the lower end of a special-shaped filter element 4, small oil drops are firstly wetted and attached on the surface of the material due to the oleophylic property of the surface of the material when passing through the aggregation-induced demulsification filler 6, and then other oil drops flowing through are further attached on the surface of the material or collide and coalesce with the oil drops which are adsorbed previously; the oil drops continuously adhere, coalesce and grow up with the continuous pumping of the oily wastewater, and when the oil drops coalesce to be large enough, the oil drops are separated from the aggregation inducing demulsification filler 6 under the action of fluid drag force, buoyancy or gravity; the separated heavy oil drops flow downwards along the inclined plane special-shaped end 7 to enter an internal oil collecting pipeline 8, finally the oil drops are collected in an oil collecting bag 9, and the rest large oil drops and water which are not settled and collected in time pass through a corrugated inclined plate layer 10;
in the second stage, after the oil drops and water which are not settled and flow out from the inclined plane special-shaped end 7 in a coalescence mode, the oil drops and the water pass through the corrugated inclined plate layer 10, the separation speed and the separation effect of large particle oil drops after coalescence are improved by using the structure of a multilayer plate of the corrugated inclined plate layer 10, and the rest small particle oil drops and water which are not quickly settled and collected pass through the super-hydrophilic-oleophobic separation filter element 11;
in the third stage, the structure of the super-hydrophilic-oleophobic separation filter element 11 is a multilayer winding filter element with an external inlet and an internal outlet; the filter elements are provided with a plurality of filter elements, and other small-particle oil drops which cannot be rapidly settled and collected in the oily wastewater treated by the special-shaped filter element 4 and the corrugated inclined plate layer 10 can be effectively intercepted by the super-hydrophilic-oleophobic separation filter element 11, water can enter the inside of the hydrophilic-oleophobic separation filter element 11 and flow out of the hydrophilic-oleophobic separation filter element 11, and finally the separation is completed through the water outlet 12;
if the device needs to carry out back flushing operation after running for a period of time to recover the overall treatment efficiency of the equipment, the liquid inlet 1 and the water outlet 12 can be exchanged and then back flushing water is introduced, the flushing time is controlled to be 10-20min, and the flushing flow is 2-5 times of that of the normal treatment of oily wastewater.
Example 4
The device for treating the light oil comprises a liquid inlet 1, a water distributor 2, a liquid inlet cavity 3, a special-shaped filter element 4, a mesh bottom plate 5, aggregation induction demulsification filler 6, an inclined plane special-shaped end 7, an internal oil collecting pipeline 8, an oil collecting bag 9, a corrugated inclined plate layer 10, a super-hydrophilic-oleophobic filter element 11, a water outlet 12, an oil outlet 13, an oil discharge valve 14, a first pressure gauge 15a, a second pressure gauge 15b, a third pressure gauge 15c, a lifting hand wheel 16, a first buckling type connecting piece 17a, a second buckling type connecting piece 17b, a third buckling type connecting piece 17c, a limiting piece 18, a supporting leg 19 and a sealing flat gasket 20, wherein the super-hydrophilic-oleophobic filter element 11, the corrugated inclined plate layer 10 and the special-shaped filter element 4 are respectively arranged in the device, the lower end of the special-shaped filter element 4 is connected with the corrugated inclined plate layer 10 through the second buckling type connecting piece 17b, the lower end of the corrugated inclined plate layer 10 is provided with the super-hydrophilic-oleophobic filter element 11, the upper end of the special-shaped filter element 4 is connected with an oil collecting bag 9 through a first buckle type connecting piece 17a, the upper end of the special-shaped filter element 4 is fixedly provided with a mesh bottom plate 5, the lower end of the special-shaped filter element 4 is a detachable inclined plane special-shaped end 7, the bottom of the super-hydrophilic-oleophobic filter element 11 is connected with a base which is respectively provided with a water outlet 12 and a third pressure gauge 15c through a third buckle type connecting piece 17c, and an oil outlet 13 at the top of the device is connected with the oil collecting bag 9;
the bottom of the corrugated inclined plate layer 10 is provided with a limiting piece 18, the outer wall of the corrugated inclined plate layer 10 is provided with a second pressure gauge 15b, the height of the corrugated plate inclined layer 10 is 10-20cm, the distance between adjacent inclined plates in the corrugated plate inclined layer 10 is 2-8mm, and the included angle between each inclined plate and the horizontal direction is 40-80 degrees;
the aperture of the mesh bottom plate 5 is 0.3-10mm, the thickness is 3-10mm, the included angle between the inclined plane special-shaped end 7 and the horizontal plane is 5-10 degrees, the thickness is 3-10mm, aggregation induction demulsification fillers 6 are respectively arranged in the special-shaped filter element 4, and an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 and is communicated with an oil collecting bag 9;
a liquid inlet cavity 3 is arranged in the oil collection bag 9, the oil collection bag 9 is adjacent to the liquid inlet cavity 3 but not communicated with the liquid inlet cavity 3, a water distributor 2 is arranged in the liquid inlet cavity 3, a liquid inlet 1 is connected with the water distributor 2, and a first pressure gauge 15a is arranged on the outer wall of the oil collection bag 9;
as shown in fig. 2, a liquid inlet 1 is connected with a water distributor 2, the water distributor 2 is arranged inside a liquid inlet cavity 3, the liquid inlet cavity 3 is communicated with the upper end of a special-shaped filter element 4, the upper end of the special-shaped filter element 4 is a mesh bottom plate 5 which is fixedly welded, aggregation-induced demulsification fillers 6 are filled inside the special-shaped filter element 4, the aggregation-induced demulsification fillers 6 can be replaced after a detachable inclined special-shaped end 7 is opened, an internal oil collecting pipeline 8 penetrates through the special-shaped filter element 4 to directly pass through an oil collecting bag 9, an oil outlet 13 is arranged at the top end of the oil collecting bag 9, a corrugated inclined plate layer 10 is arranged at the lower end of the special-shaped filter element 4, a super-hydrophilic-oleophobic filter element 11 is arranged at the lower end of the corrugated inclined plate layer 10, and a water outlet 12 is arranged at the bottom of the device;
in the first stage, oily wastewater enters the water distributor 2 through the liquid inlet 1, so that liquid is dispersed in the liquid inlet cavity 3 to ensure more uniform initial distribution, the utilization rate of the special-shaped filter element 4 is increased, and the possibility of local scaling and liquid channeling is reduced; the oil-containing wastewater which is uniformly distributed enters from a mesh bottom plate 5 at the upper end of a special-shaped filter element 4, small oil drops are firstly wetted and attached on the surface of the material due to the oleophylic property of the surface of the material when passing through an aggregation induction demulsification filler 6, and then other oil drops flowing through are further attached on the surface of the material or collide and coalesce with the oil drops which are adsorbed previously; the oil drops continuously adhere, coalesce and grow up with the continuous pumping of the oily wastewater, and when the oil drops coalesce to be large enough, the oil drops are separated from the aggregation inducing demulsification filler 6 under the action of fluid drag force, buoyancy or gravity; the separated light large oil drops flow upwards along the inclined plane special-shaped end 7 to enter the internal oil collecting pipeline 8, finally the oil drops are collected in the oil collecting bag 9, and the rest large oil drops and water which are not collected in time in a floating way pass through the corrugated inclined plate layer 10;
in the second stage, after the oil drops flow out from the inclined plane special-shaped end 7 in a coalescence mode, part of the oil drops which are not floated and collected pass through the corrugated inclined plate layer 10 along with the water phase, the floating area is increased by utilizing the low floating height of the corrugated inclined plate layer 10 and the structure of a multilayer plate, the separation speed and the separation effect of large particle oil drops after coalescence are improved, and the rest small particle oil drops and water which cannot be collected quickly are treated by the super-hydrophilic-oleophobic separation filter element 11;
in the third stage, the structure of the super-hydrophilic-oleophobic separation filter element 11 is a multilayer winding filter element with an external inlet and an internal outlet; the filter elements are provided with a plurality of filter elements, and other small-particle oil drops which cannot be quickly floated and collected in the oily wastewater treated by the special-shaped filter element 4 and the corrugated inclined plate layer 10 can be effectively intercepted by the super-hydrophilic-oleophobic separation filter element 11, water can enter the inside of the hydrophilic-oleophobic separation filter element 11 and flow out of the inside of the hydrophilic-oleophobic separation filter element 11, and finally the separation is completed through the water outlet 12;
if the device needs to carry out back flushing operation after running for a period of time to recover the overall treatment efficiency of the equipment, the liquid inlet 1 and the water outlet 12 can be exchanged and then back flushing water is introduced, the flushing time is controlled to be 10-20min, and the flushing flow is 2-5 times of that of the normal treatment of oily wastewater.
The embodiments described are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any inventive work belong to the protection scope of the present invention.
Claims (5)
1. An oily wastewater treatment method based on aggregation-induced demulsification is characterized in that the oily wastewater comprises heavy oil or light oil, and the related device comprises a liquid inlet (1), a water distributor (2), a liquid inlet cavity (3), a special-shaped filter element (4), a mesh bottom plate (5), aggregation-induced demulsification fillers (6), an inclined plane special-shaped end (7), an internal oil collecting pipeline (8), an oil collecting bag (9), a corrugated inclined plate layer (10), a super-hydrophilic-oleophobic filter element (11), a water outlet (12), an oil outlet (13), an oil discharge valve (14), a first pressure gauge (15a), a second pressure gauge (15b), a third pressure gauge (15c), a lifting hand wheel (16), a first buckle type connecting piece (17a), a second buckle type connecting piece (17b), a third buckle type connecting piece (17c) and a limiting piece (18), the device comprises supporting legs (19) and a sealing flat gasket (20), wherein a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) are respectively arranged in the device for treating heavy oil, the upper end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the upper end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the lower end of the special-shaped filter element (4) is connected with an oil collection bag (9) through a first buckle type connecting piece (17a), a liquid inlet cavity (3) is arranged in the oil collection bag (9), a water distributor (2) connected with a liquid inlet (1) is arranged in the liquid inlet cavity (3), the bottom of the oil collection bag (9) is provided with an oil outlet (13), a mesh bottom plate (5) is fixed at the lower end of the special-shaped filter element (4), the upper end of the filter element (4) is an inclined plane special-shaped end (7), be equipped with in special-shaped filter core (4) respectively and be filled with aggregation induction breakdown of emulsion filler (6), inside oil collecting pipeline (8) pass special-shaped filter core (4) and lead to oil collection package (9), pass through third buckle formula connecting piece (17c) and be equipped with delivery port (12), third manometer (15c) and lifting hand wheel (16) respectively on the top of super hydrophilic-oleophobic filter core (11) and be connected, concrete operation is according to following step and is gone on:
a. under the condition that the first buckle type connecting piece (17a), the second buckle type connecting piece (17b) and the third buckle type connecting piece (17c) are well sealed, the liquid inlet (1) and the water outlet (12) are adjusted to be in an open state, an oil discharge valve (14) at the bottom end is closed, heavy oil-containing wastewater to be treated is led in from the liquid inlet (1) by means of external power and uniformly dispersed into the liquid inlet cavity (3) through a mesh plate of the water distributor (2), and a pressure gauge (15a) is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity (3) enters the special-shaped filter element (4) through the mesh bottom plate (5), when oily wastewater contacts the aggregation induction demulsification filler (6) in the special-shaped filter element (4), small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined plane special-shaped end (7) along with the water phase, and at the moment, heavy large oil drops flow into the oil collection bag (9) through the internal oil collection pipeline (8) under the action of gravity to be collected;
c. the large oil drops and the small oil drops which do not settle in time in the step b continuously move upwards along the hydraulic direction along with the water phase, when the large oil drops pass through the inclined layer (10) of the corrugated plate, the large oil drops which do not settle in time are further strengthened to settle, and the water phase and the small oil drops penetrate out of the inclined layer (10) of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer (10) contact the outer surface of the super-hydrophilic-oleophobic filter element (11) in the step c, the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element (11), then the water phase is discharged from the opened water outlet (12), the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element (11), the oil droplets are finally gathered and enlarged due to the fact that the quantity of the intercepted oil droplets is continuously increased and the mutual collision frequency is increased, the oil droplets enter the oil collecting bag (9) through the internal oil collecting pipeline (8), and the oil discharging valve (14) is controlled to open the oil discharging port (13) to be discharged;
the device for treating the light oil is internally provided with a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) respectively, the lower end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the lower end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the upper end of the special-shaped filter element (4) is connected with an oil collecting bag (9) through a first buckle type connecting piece (17a), a liquid inlet cavity (3) is arranged in the oil collecting bag (9), a water distributor (2) connected with a liquid inlet (1) is arranged in the liquid inlet cavity (3), the top of the oil collecting bag (9) is provided with an oil discharge port (13), the upper end of the special-shaped filter element (4) is fixed by a mesh bottom plate (5), the lower end of the special-shaped filter element (4) is a special-shaped inclined surface end (7), and aggregation inducing demulsification fillers (6) are respectively filled in the filter element (4), inside oil collecting pipeline (8) pass through special-shaped filter core (4) and lead to oil collection package (9), pass through third buckle formula connecting piece (17c) and be connected with the base that is equipped with delivery port (12), third manometer (15c) and landing leg (19) respectively in the bottom of super hydrophilic-oleophobic filter core (11), and concrete operation is according to following step and is gone on:
a. under the condition that the first buckle type connecting piece (17a), the second buckle type connecting piece (17b) and the third buckle type connecting piece (17c) are well sealed, the liquid inlet (1) and the water outlet (12) are adjusted to be in an open state, an oil discharge valve (14) at the top end is closed, heavy oil-containing wastewater to be treated is led in from the liquid inlet (1) by means of external power and uniformly dispersed into the liquid inlet cavity (3) through a mesh plate of the water distributor (2), and a pressure gauge (15a) is controlled to be between 0.1 and 0.3 MPa;
b. liquid in the liquid inlet cavity (3) enters the special-shaped filter element (4) through the mesh bottom plate (5), when oily wastewater contacts the aggregation induction demulsification filler (6) in the special-shaped filter element (4), small oil drops aggregate and become large oil drops, then the large oil drops flow out from the inclined plane special-shaped end (7) along with the water phase, and at the moment, light large oil drops flow into the oil collecting bag (9) through the internal oil collecting pipeline (8) under the action of buoyancy force to be collected;
c. the large oil drops and the small oil drops which do not rise in time in the step b continuously move downwards along the hydraulic direction along with the water phase, when the large oil drops pass through the inclined layer (10) of the corrugated plate, the large oil drops which do not collect in time are further strengthened to rise, and the water phase and the small oil drops penetrate out of the inclined layer (10) of the corrugated plate;
d. when the water phase and the oil droplets penetrating out of the corrugated inclined plate layer (10) in the step c contact the outer surface of the super-hydrophilic-oleophobic filter element (11), the water phase enters the inner side from the outer side of the super-hydrophilic-oleophobic filter element (11), and then the water phase is discharged from the opened water outlet (12), the oil droplets are intercepted by the super-hydrophilic-oleophobic filter element (11), the oil droplets are increased in quantity and the mutual collision frequency is increased after the oil droplets are intercepted, the oil droplets are finally gathered and enlarged, the oil droplets enter the oil collecting bag (9) through the internal oil collecting pipeline (8), and the oil discharge valve (14) is controlled to open the oil discharge port (13) to discharge the oil.
2. The utility model provides an oily waste water treatment facilities based on aggregation induction breakdown of emulsion, its characterized in that the device is including handling heavy oil device or handling light oil device, it is by inlet (1) to handle heavy oil device, water-locator (2), feed liquor chamber (3), special-shaped filter core (4), mesh bottom plate (5), aggregation induction breakdown of emulsion filler (6), inclined plane dysmorphism end (7), inside oil collecting pipeline (8), collection oil package (9), ripple inclined plate layer (10), super hydrophilic-oleophobic filter core (11), delivery port (12), oil drain port (13), oil drain valve (14), first manometer (15a), second manometer (15b), third manometer (15c), lifting hand wheel (16), first buckle formula connecting piece (17a), second buckle formula connecting piece (17b), third buckle formula connecting piece (17c), locating part (18), the device comprises supporting legs (19) and a sealing flat pad (20), wherein a super-hydrophilic-oleophobic filter element (11), a corrugated inclined plate layer (10) and a special-shaped filter element (4) are respectively arranged in the device, the upper end of the special-shaped filter element (4) is connected with the corrugated inclined plate layer (10) through a second buckle type connecting piece (17b), the upper end of the corrugated inclined plate layer (10) is provided with the super-hydrophilic-oleophobic filter element (11), the lower end of the special-shaped filter element (4) is connected with an oil collecting bag (9) through a first buckle type connecting piece (17a), the lower end of the special-shaped filter element (4) is fixedly provided with a mesh bottom plate (5), the upper end of the special-shaped filter element (4) is provided with a detachable inclined plane special-shaped end (7), and the top cover of the super-hydrophilic-oleophobic filter element (11) is connected with a top cover which is respectively provided with a water outlet (12), a third pressure gauge (15c) and a lifting hand wheel (16) through a third buckle type connecting piece (17c), an oil drain port (13) at the bottom of the device is connected with an oil collecting bag (9);
the device for treating the light oil is composed of a liquid inlet (1), a water distributor (2), a liquid inlet cavity (3), a special-shaped filter element (4), a mesh bottom plate (5), aggregation-induced demulsification filler (6), an inclined plane special-shaped end (7), an internal oil collecting pipeline (8), an oil collecting bag (9), a corrugated inclined plate layer (10), a super-hydrophilic-oleophobic filter element (11), a water outlet (12), an oil outlet (13), an oil discharge valve (14), a first pressure gauge (15a), a second pressure gauge (15b), a third pressure gauge (15c), a lifting hand wheel (16), a first buckle type connecting piece (17a), a second buckle type connecting piece (17b), a third buckle type connecting piece (17c), a limiting piece (18), supporting legs (19) and a sealing flat cushion (20), wherein the super-hydrophilic-oleophobic filter element (11), the corrugated inclined plate layer (10) and the super-hydrophilic-oleophobic filter element (11) are arranged in the device respectively, Dysmorphism filter core (4), pass through second buckle formula connecting piece (17b) and be connected with ripple inclined plate layer (10) at the lower extreme of dysmorphism filter core (4), the lower extreme of ripple inclined plate layer (10) is equipped with super hydrophilic-oleophobic filter core (11), be connected with album oil package (9) through first buckle formula connecting piece (17a) in the upper end of dysmorphism filter core (4), dysmorphism filter core (4) upper end fixed mesh bottom plate (5), the lower extreme of dysmorphism filter core (4) is detachable inclined plane dysmorphism end (7), pass through third buckle formula connecting piece (17c) and be equipped with delivery port (12) respectively in the bottom of super hydrophilic-oleophobic filter core (11), the base of third manometer (15c) is connected, oil drain (13) at the device top is connected with album oil package (9).
3. The oily wastewater treatment device based on aggregation-induced demulsification as claimed in claim 2, wherein a limiting piece (18) is arranged at the bottom of the corrugated inclined plate layer (10), a second pressure gauge (15b) is arranged on the outer wall of the corrugated inclined plate layer (10), the height of the corrugated plate inclined layer (10) is 10-20cm, the distance between adjacent inclined plates in the corrugated plate inclined layer (10) is 2-8mm, and the included angle between the inclined plates and the horizontal direction is 40-80 degrees.
4. The oily wastewater treatment device based on aggregation induction demulsification as claimed in claim 2, wherein the aperture of the mesh bottom plate (5) is 0.3-10mm, the thickness is 3-10mm, the included angle between the inclined plane special-shaped end (7) and the horizontal plane is 5-10 degrees, the thickness is 3-10mm, aggregation induction demulsification fillers (6) are respectively arranged in the special-shaped filter elements (4), and the internal oil collecting pipeline (8) passes through the special-shaped filter elements (4) and is directly communicated with the oil collecting bag (9).
5. The oily wastewater treatment device based on aggregation induction demulsification as claimed in claim 2, wherein a liquid inlet cavity (3) is arranged in the oil collection bag (9), the oil collection bag (9) is adjacent to the liquid inlet cavity (3) but not communicated with the liquid inlet cavity, a water distributor (2) is arranged in the liquid inlet cavity (3), the liquid inlet (1) is connected with the water distributor (2), and a first pressure gauge (15a) is arranged on the outer wall of the oil collection bag (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111541526.7A CN114146453B (en) | 2021-12-16 | 2021-12-16 | Oily wastewater treatment method and device based on aggregation-induced demulsification |
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| CN202111541526.7A CN114146453B (en) | 2021-12-16 | 2021-12-16 | Oily wastewater treatment method and device based on aggregation-induced demulsification |
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| CN114146453B (en) | 2023-03-21 |
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