CN112495353A - Integrated device for continuously recovering thin oil film on water surface - Google Patents
Integrated device for continuously recovering thin oil film on water surface Download PDFInfo
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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
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- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
Abstract
The invention discloses a preparation method of an oil suction pipe and an integrated device for continuously recovering a thin oil film on a water surface, wherein the integrated device comprises a carrying system, an oil storage system, a pressure system and an oil suction assembly, wherein the oil storage system and the pressure system are arranged on the carrying system; the oil storage system comprises an oil storage tank, a pressure gauge, an air release valve and an oil release valve; the air release valve is arranged above the side of the oil storage tank and is connected with the pressure system; the oil drain valve is arranged below the side of the oil storage tank and used for discharging collected oil products; the pressure system is connected with the oil storage tank and is used for providing power required by continuously collecting oil products; the oil suction assembly floats on an oil-water interface and comprises a connecting pipeline and a plurality of oil suction pipes, the oil suction pipes are connected on the connecting pipeline in parallel, the connecting pipeline is a closed pipeline and is connected with one end of a hose through a joint, and the other end of the hose is connected with the oil storage tank. The device can continuously recover the thin oil film on the water surface, and has the advantages of flexibility, high efficiency, large flux, good cycle performance and no secondary pollution.
Description
Technical Field
The invention relates to the field of oily wastewater treatment, in particular to an integrated device for continuously recovering a thin oil film on a water surface.
Background
With the rapid development of global industry and economy, the leakage of crude oil and oily organic solvents in the processes of mining, oil refining, oil storage and transportation, and the discharge of oily wastewater in industrial processes (such as textile, leather, metal processing and the like) cause disastrous damage to oceans, rivers and aquatic ecosystems, thereby not only causing huge economic loss, but also seriously threatening aquatic organisms and even human health. Statistically, about 32 billion cubic tons of oil or oily organic solvent flow into the water each year, while 1 ton of oil can form a thin oil film with an area of 12 kilo square meters on the water surface. The thin oil film thus formed severely hampers the normal water vapor exchange process, and the effects on aquatic life, atmospheric environment, and food chain are all catastrophic. Therefore, how to treat the floating oil on the water quickly and efficiently to realize the reuse of the waste oil becomes one of the worldwide problems. The traditional oily wastewater treatment method (such as gravity settling, centrifugal separation, air floatation, electrochemical method, biological treatment and the like) is widely applied to the treatment of an actual oil-water system, but the traditional oily wastewater treatment method generally has some problems in the treatment process, such as poor oil-water selectivity, long separation time, high energy consumption, secondary pollution and the like. Therefore, the development of a new generation of efficient floating oil treatment technology on water has become an urgent problem to be solved.
In the technology of floating oil treatment on water, the oil product is directly and selectively adsorbed by using a hydrophobic oleophylic adsorption material, and the method is a technical means with low energy consumption and high efficiency. In recent years, researchers find that a micro-nano rough structure is constructed on the surface of a porous material matrix by using a low-surface-energy substance, so that an adsorption material with super-wettability (super-hydrophobicity-super-oleophylicity) can be prepared. Compared with the traditional adsorbing materials (such as wheat straws, wool, activated carbon, zeolite, bentonite and the like), the composite adsorbing material has larger adsorption capacity and greatly improved oil-water selectivity. The micro-nano carbon is widely used for preparing high-performance adsorption materials due to excellent chemical stability, large specific surface area, self hydrophobic-super oleophilic property and the like. However, in the process of treating floating oil on water by using the adsorbing material, when the oil adsorbed in the material reaches the saturated adsorption capacity of the material, the adsorption function is exhausted, and the oil in the material needs to be desorbed by a certain method (extrusion, combustion, extraction, etc.) or the material needs to be replaced for reuse. Therefore, even if the adsorbing material has excellent adsorption capacity and oil-water selectivity, the process for treating the floating oil on water still adopts intermittent operation, and the floating oil on water cannot be continuously and efficiently collected, so that the application of the adsorbing material in the practical treatment of large-area water surface thin oil films is hindered.
Therefore, researchers are continuously exploring new materials and processes capable of continuously treating floating oil on water based on the research on the micro-nano carbon adsorption material. For example, CN103521199A discloses a method for preparing a hollow tubular composite oil absorption material, in which a hollow tubular porous polymer material is immersed in graphene dispersion liquid, and after heat treatment, a graphene adsorption layer is loaded on the surface of a matrix layer, the maximum adsorption amounts of the prepared adsorption material to trichloroethylene, kerosene and diesel oil can respectively reach 169.4g/g, 97.2g/g and 88.6g/g, and meanwhile, one end of the material is sealed and placed in toluene/water solution, and the other end of the material provides negative pressure, so that continuous dynamic adsorption to oil products can be realized. CN104128866A discloses a hollow tubular oil absorption material and a preparation method thereof, the oil absorption material takes a spring as a core part, the outer side of the spring is wrapped by a sheet-shaped sponge, and the outer layer of the sponge is coated with a graphene oxide layer. The oil absorption material is put into an oil-water system, and a negative pressure device is provided at one end of the oil absorption material, so that continuous dynamic separation of an oil-water mixture can be realized. Although these novel micro-nano carbon oil absorption materials and oil water treatment process can carry out continuous collection to the oil, broken traditional adsorption material intermittent operation mode, all stop in laboratory lab scale stage, and to thin oil film system treatment effect on water unknown.
In addition, in the actual oil leakage accident, the floating oil on water diffuses very fast, and the oil spilling point can be captured quickly and accurately in the disposal process, and the oil spilling area is separated quickly and efficiently, so that the harm can be reduced to the maximum extent. Obviously, the innovation of materials and adsorption modes is needed, and an integrated device which integrates a continuous oil absorption system, a continuous oil storage system, a driving system and a carrying system and can quickly and efficiently recover floating oil on the water surface needs to be developed and designed, so that the precise positioning, continuous adsorption and efficient recovery of the thin oil film on the water surface are realized. However, such an integrated device is rarely reported at home and abroad, and it is urgent to develop an integrated device capable of efficiently recovering a thin oil film on a water surface.
Disclosure of Invention
In order to solve the problem of recovering the spilled oil in a large water area, the invention aims to provide a preparation method of an oil suction pipe. Another object of the present invention is to provide an integrated device made of oil suction pipe that can recover thin oil film on water surface with high efficiency.
Therefore, the technical scheme of the invention is as follows:
the preparation method of the oil suction pipe comprises the following steps:
s1, preparing micro-nano carbon dispersion liquid: mixing micro-nano carbon with the mass fraction of 0.1-2 wt.% with absolute ethyl alcohol, and ultrasonically oscillating for 1-2 hours at 30 ℃ to obtain a micro-nano carbon dispersion liquid;
s2, preparation of polymer spray: the polymer spraying liquid is prepared from the following components in percentage by mass:
1-6 wt.% of polyvinylidene fluoride
0.5-3 wt.% of stearic acid
91-98.5 wt.% of solvent
The preparation method of the polymer spraying liquid comprises the following steps: adding the stearic acid into the solvent, stirring for 2-4 h at 40-80 ℃, adding the polyvinylidene fluoride into the solution, and continuously stirring for 2h to obtain the polymer spraying liquid;
s3, preparing the micro-nano carbon composite non-woven cloth oil absorption material: cleaning a non-woven fabric in deionized water to remove surface impurities, airing, placing the non-woven fabric in the micro-nano carbon dispersion liquid obtained in the step (1) for soaking for 1-10 min, placing the non-woven fabric in an oven, drying for 1-3 h at 30-80 ℃, and taking out; pouring the polymer spraying liquid obtained in the step (2) into a spray gun, spraying the spraying liquid on two sides of the dried non-woven fabric under the pressure of 0.1-0.5 MPa, arranging the non-woven fabric in a drying oven after spraying, and drying for 48-72 hours at the temperature of 30-80 ℃ to obtain the micro-nano carbon composite non-woven fabric oil absorption material;
s4, preparing an oil suction pipe: and (3) winding the micro-nano carbon composite non-woven cloth oil absorption material obtained in the step (3) on the surface of a porous polymer hollow tube, and bonding the interface with glue to obtain the oil absorption tube, wherein the outer diameter of the porous polymer hollow tube is 1-5cm, the length of the porous polymer hollow tube is 10-50 cm, the diameter of each hole is 0.1-1 cm, and the interval between adjacent holes is 0.1-1 cm. ,
preferably, the average particle size of the micro-nano carbon in step S1 is 0.5-10 μm.
Preferably, the material of the non-woven fabric in step S3 is one or two of polypropylene, polyamide and polyethylene terephthalate, which are blended at any ratio.
Preferably, the solvent in step S2 is any one of N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone, triethyl phosphate, or a mixture of two thereof in any ratio.
Preferably, the hollow tube of porous polymer is a hollow tube of porous polyvinyl chloride, porous polyurethane or porous polypropylene.
Preferably, in step S4, the micro-nano carbon composite non-woven fabric oil absorption material is wound on the surface of the porous polymer hollow tube by 1-2 layers, and the interface is bonded by epoxy resin glue.
An integrated device for continuously recovering and recovering a thin oil film on a water surface comprises a carrying system, an oil storage system, a pressure system and an oil absorption assembly,
the oil storage system and the pressure system are arranged on the carrying system;
the oil storage system comprises an oil storage tank, a pressure gauge, an air release valve and an oil release valve, wherein the pressure gauge is arranged above the oil storage tank and used for monitoring the internal pressure of the tank body; the air release valve is arranged above the side of the oil storage tank, is connected with the pressure system and is used for adjusting the pressure in the tank body; the oil drain valve is arranged below the side of the oil storage tank and used for discharging collected oil products;
the pressure system is connected with the oil storage tank and is used for providing power required by continuously collecting oil products;
the oil absorption assembly floats on an oil-water interface and comprises a connecting pipeline and a plurality of oil absorption pipes prepared by the preparation method, the oil absorption pipes are connected in parallel on the connecting pipeline 2, the connecting pipeline 2 is a closed pipeline and is connected with one end of a hose 4 through a joint 3, and the other end of the hose 4 is connected with the oil storage tank 7. The oil absorption component can be horizontally arranged on a floating body so as to float on an oil-water interface.
The carrying system is a ship or an unmanned boat, the length of the unmanned boat is 100-500cm, the height is 500-1000cm, the width is 100-500cm, the no-load weight is 20-100kg, the remote control distance is 1-10km, and the material is marine aluminum alloy.
Preferably, the storage tank has a capacity of 50 to 99L, and the hose 4 has an inner diameter of 0.6 to 1 cm.
Preferably, the pressure system is a diaphragm vacuum pump, and the flow rate of the diaphragm vacuum pump is 30-120L/min.
The invention has the following beneficial effects:
the micro-nano carbon composite non-woven cloth oil absorption material wrapped outside the oil absorption pipe prepared by the method has strong affinity to oil products and is water-repellent. In the working process of the integrated device, floating oil on the water surface can be adsorbed into the oil absorption assembly by the micro-nano carbon composite non-woven fabric oil absorption material and is continuously collected into the oil storage tank through the pipeline by pressure driving, and the process simultaneously promotes more oil to be continuously adsorbed and collected, so that continuous-dynamic thin oil film recovery is realized.
The integrated device has no upper limit of saturated adsorption capacity, has the recovery efficiency of the thin oil film on water as high as more than 87 percent, and has the advantages of flexible use, high efficiency, large flux, good cycle performance and no secondary pollution. The integrated device can be used for efficiently treating oil-containing wastewater and oily hazardous chemical substance leakage accidents in the scenes of oceans, rivers, port wharfs and the like.
In addition, compared with the traditional floating oil treatment technology, the integrated device can also greatly reduce the risk of operating personnel. When the carrying system is an unmanned boat, the integrated device can realize remote control tracking of an oil spilling region, continuous-efficient recovery of a water surface thin oil film can be realized without personnel on the carrying system, direct contact of operating personnel with oily hazardous chemicals is avoided, and accordingly, the health and safety of the operating personnel are guaranteed while the efficiency is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the integrated device for continuously recovering a thin oil film on a water surface according to the present invention;
fig. 2 is a schematic view of the structure of the oil suction pipe in the present invention.
In the figure:
1-oil suction pipe, 2-pipeline, 3-joint, 4-hose, 5-carrying system, 6-pressure gauge, 7-oil storage tank, 8-air release valve, 9-oil release valve and 10-pressure device.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific examples.
Example 1
This embodiment is used to illustrate the oil absorption tube provided by the present invention, that is, the preparation method of the porous polymer hollow tube coated with the micro-nano carbon composite nonwoven oil absorption material, which includes the following steps:
(1) preparing micro-nano carbon dispersion liquid: mixing micro-nano carbon with the mass fraction of 0.5 wt.% and the average particle size of 2.87 microns with absolute ethyl alcohol, and ultrasonically shaking for 2 hours at 30 ℃ to obtain a micro-nano carbon dispersion liquid;
(2) preparation of polymer spray coating liquid: adding 2 wt.% of stearic acid into 95 wt.% of N, N-dimethylformamide, stirring for 2h at 80 ℃, then adding 3 wt.% of polyvinylidene fluoride into the solution, and continuously stirring for 2h to obtain the polymer spraying liquid;
(3) preparing a micro-nano carbon composite non-woven fabric oil absorption material: putting the polyethylene terephthalate non-woven fabric into deionized water for cleaning to remove surface impurities, airing, putting into the micro-nano carbon dispersion liquid obtained in the step (1), soaking for 5min, putting into an oven, drying for 2h at 80 ℃, and taking out; pouring the polymer spraying liquid obtained in the step (2) into a spray gun, spraying the spraying liquid on two sides of the dried non-woven fabric under the pressure of 0.2MPa, and drying the non-woven fabric in an oven at the temperature of 80 ℃ for 48 hours after spraying to obtain the micro-nano carbon composite non-woven fabric oil absorption material;
(4) preparing an oil suction pipe: and (3) winding the micro-nano carbon composite non-woven cloth oil absorption material obtained in the step (3) on the surface of a porous polyvinyl chloride hollow tube (winding 2 layers), wherein the outer diameter of the tube is 5cm, the length of the tube is 20cm, the diameter of each hole is 0.1cm, the interval between adjacent holes is 0.1cm, and the interface of the micro-nano carbon composite non-woven cloth oil absorption material is bonded with the surface of the hollow tube or the surface of the hollow tube by using epoxy resin glue to obtain the oil absorption tube. The section schematic diagram is shown in fig. 2, wherein 10 is a micro-nano carbon composite non-woven cloth oil absorption material, and 20 is a porous polymer hollow tube.
The test shows that the water contact angle of the oil suction pipe is 122.6 degrees, and the flux of the oil suction pipe to kerosene is 7928L/m under the pressure of-0.02 MPa2h。
When floating oil on water needs to be treated, the recovery device is conveyed to an oil overflow point on the water surface through the carrying system, the oil absorption assembly is arranged at an oil-water interface and the pressure system is started, the oil absorption assembly floating on the oil-water interface can continuously collect the thin oil film, the assembly has no upper limit of saturated adsorption capacity, and the collected oil is stored in the oil storage tank in a centralized manner so as to be convenient for centralized treatment or recycling. Meanwhile, the oil absorption assembly can freely move on the water surface through the carrying system, and after a thin oil film in a certain area is processed, the oil absorption assembly can be quickly transferred to another area to be processed for secondary processing, so that the working efficiency is greatly improved.
Example 2
This embodiment is used to illustrate the oil absorption tube provided by the present invention, that is, the preparation method of the porous polymer hollow tube coated with the micro-nano carbon composite nonwoven oil absorption material, which includes the following steps:
(1) preparing micro-nano carbon dispersion liquid: mixing micro-nano carbon with the mass fraction of 1 wt.% and the average particle size of 4.36 mu m with absolute ethyl alcohol, and ultrasonically vibrating for 2 hours at 30 ℃ to obtain micro-nano carbon dispersion liquid;
(2) preparation of polymer spray coating liquid: adding 1 wt.% of stearic acid into 95 wt.% of N, N-dimethylacetamide, stirring for 1h at 60 ℃, adding 4 wt.% of polyvinylidene fluoride into the solution, and continuously stirring for 2h to obtain the polymer spraying liquid;
(3) preparing a micro-nano carbon composite non-woven fabric oil absorption material: cleaning polypropylene non-woven fabric in deionized water to remove surface impurities, airing, placing the polypropylene non-woven fabric in the micro-nano carbon dispersion liquid obtained in the step (1) for soaking for 2min, then placing the micro-nano carbon dispersion liquid in an oven for drying for 2h at the temperature of 60 ℃, and taking out; pouring the polymer spraying liquid obtained in the step (2) into a spray gun, spraying the spraying liquid on two sides of the dried non-woven fabric under the pressure of 0.1MPa, and drying the non-woven fabric in an oven at the temperature of 70 ℃ for 72 hours after spraying to obtain the micro-nano carbon composite non-woven fabric oil absorption material;
(4) preparing an oil suction pipe: and (3) winding the micro-nano carbon composite non-woven cloth oil absorption material obtained in the step (3) on the surface of a porous polyvinyl chloride hollow tube (winding 2 layers), wherein the outer diameter of the tube is 5cm, the length of the tube is 50cm, the diameter of each hole is 1cm, the interval between adjacent holes is 0.5cm, and the interface of the micro-nano carbon composite non-woven cloth oil absorption material is bonded with the surface of the hollow tube or the surface of the hollow tube by using epoxy resin glue to obtain the oil absorption tube.
The test shows that the water contact angle of the oil suction pipe is 145.6 degrees, and the flux to kerosene is 11278L/m under the pressure of-0.02 MPa2h。
Example 3
This embodiment is used to illustrate the oil absorption tube provided by the present invention, that is, the preparation method of the porous polymer hollow tube coated with the micro-nano carbon composite nonwoven oil absorption material, which includes the following steps:
(1) preparing micro-nano carbon dispersion liquid: mixing micro-nano carbon with the mass fraction of 1.5 wt.% and the average particle size of 1.86 mu m with absolute ethyl alcohol, and ultrasonically vibrating for 3 hours at 30 ℃ to obtain micro-nano carbon dispersion liquid;
(2) preparation of polymer spray coating liquid: adding 1.5 wt.% of stearic acid into 95.5 wt.% of triethyl phosphate, stirring at 70 ℃ for 2 hours, adding 3 wt.% of polyvinylidene fluoride into the solution, and continuously stirring for 3 hours to obtain the polymer spraying liquid;
(3) preparing a micro-nano carbon composite non-woven fabric oil absorption material: putting polyamide non-woven fabric into deionized water for cleaning to remove surface impurities, airing, putting the polyamide non-woven fabric into the micro-nano carbon dispersion liquid obtained in the step (1), soaking for 4min, putting the polyamide non-woven fabric into an oven, drying for 1h at 70 ℃, and taking out; pouring the polymer spraying liquid obtained in the step (2) into a spray gun, spraying the spraying liquid on two sides of the dried non-woven fabric under the pressure of 0.3MPa, and drying the non-woven fabric in an oven at the temperature of 70 ℃ for 60 hours after spraying to obtain the micro-nano carbon composite non-woven fabric oil absorption material;
(4) preparing an oil suction pipe: and (3) winding the micro-nano carbon composite non-woven cloth oil absorption material obtained in the step (3) on the surface of a porous polypropylene hollow tube (winding 1 layer), wherein the outer diameter of the tube is 5cm, the length of the tube is 40cm, the diameter of each hole is 2cm, the interval between adjacent holes is 0.1cm, and the interface of the micro-nano carbon composite non-woven cloth oil absorption material is bonded with the surface of the hollow tube or the surface of the hollow tube by using epoxy resin glue to obtain the oil absorption tube.
The test shows that the water contact angle of the oil suction pipe is 133.2 degrees, and the flux to kerosene is 9278L/m under the pressure of-0.02 MPa2h。
Example 4
This embodiment is used to illustrate the preparation and application of the integrated device provided by the present invention.
As shown in fig. 1, 9 oil suction pipes prepared in example 3 are connected side by side through a pipeline 2 to obtain the oil suction assembly, the obtained oil suction assembly is connected with a hose 3 through a joint 2, the inner diameter of the hose is 0.6cm, the other side of the hose 3 is connected with an oil storage tank 7, the volume of the oil storage tank 7 is 50L, a negative pressure gauge 6 is installed above the oil storage tank, a release valve 8 and an oil release valve 9 are respectively installed on the side of the oil storage tank, and the release valve is connected with a vacuum pump 10 through a vacuum pipeline. The pressure system and the oil storage system are arranged on the unmanned ship 5 of the carrying system, the unmanned ship is 200cm in length, 510cm in height, 150cm in width, 35kg in unloaded weight and 1km in remote control distance, and the unmanned ship is made of marine aluminum alloy.
In order to simulate actual floating oil on water, 10L of kerosene is poured onto the water surface of a water tank, the manufactured integrated device is placed on an oil-water interface, a power supply is started, the pressure is adjusted to-0.02 MPa, the integrated device is started, at the moment, as the micro-nano carbon composite non-woven cloth oil absorption material wrapped outside an oil absorption pipe in an oil absorption assembly has strong affinity to oil and simultaneously repels water, the floating oil on the water surface can be absorbed into the oil absorption assembly by the micro-nano carbon composite non-woven cloth oil absorption material and is continuously collected into an oil storage tank through a pipeline by pressure driving, the process simultaneously promotes more oil to be continuously absorbed and collected, and thus continuous-dynamic thin oil film recovery is realized. Meanwhile, the position of the oil absorption membrane component can be adjusted by controlling the unmanned boat, and the thin oil membrane on water can be accurately tracked and recovered. Tests show that the recovery efficiency of the integrated device prepared by the method on the thin oil film on water can reach 90.2%.
Example 5
This embodiment is used to illustrate the preparation and application of the integrated device provided by the present invention.
According to the connection relation of figure 1, 12 oil suction pipes prepared in the embodiment 2 are connected side by side through a pipeline 2 to obtain the oil suction assembly, the obtained oil suction assembly is connected with a hose 4 through a joint 3, the inner diameter of the hose 4 is 0.6cm, the other side of the hose 4 is connected with an oil storage tank 7, the volume of the oil storage tank 7 is 75L, a negative pressure gauge 6 is installed above the oil storage tank, a release valve 8 and an oil release valve 9 are respectively installed on the side of the oil storage tank, and the release valve is connected with a vacuum pump 10 through a vacuum pipeline. The pressure system and the oil storage system are arranged on the unmanned ship 5 of the carrying system, the unmanned ship is 350cm in length, 550cm in height, 120cm in width, 45kg in no-load weight, 1.5km in remote control distance and made of marine aluminum alloy.
In order to simulate actual floating oil on water, 20L of diesel oil is poured onto the water surface of a water tank, the manufactured integrated device is placed on an oil-water interface, a power supply is started, the pressure is adjusted to-0.02 MPa, the integrated device is started, at the moment, as the micro-nano carbon composite non-woven cloth oil absorption material wrapped outside the oil absorption pipe in the oil absorption assembly has strong affinity to oil and simultaneously rejects water, the floating oil on the water surface can be absorbed into the oil absorption assembly by the micro-nano carbon composite non-woven cloth oil absorption material and is continuously collected into an oil storage tank through a pipeline by pressure driving, the process simultaneously promotes more oil to be continuously absorbed and collected, and thus continuous-dynamic thin oil film recovery is realized. Meanwhile, the position of the oil absorption membrane component can be adjusted by controlling the unmanned boat, and the thin oil membrane on water can be accurately tracked and recovered. Tests show that the recovery efficiency of the integrated device prepared by the method on the thin oil film on water can reach 87.3 percent.
Example 6
This embodiment is used to illustrate the preparation and application of the integrated device provided by the present invention.
According to the connection relation of figure 1, 12 oil suction pipes prepared in the embodiment 2 are connected side by side through a pipeline 2 to obtain the oil suction assembly, the obtained oil suction assembly is connected with a hose 3 through a connector 2, the inner diameter of the hose is 0.8cm, the other side of the hose 3 is connected with an oil storage tank 7, the volume of the oil storage tank 7 is 70L, a negative pressure gauge 6 is installed above the oil storage tank, a release valve 8 and an oil release valve 9 are installed on the side of the oil storage tank respectively, and the release valve is connected with a vacuum pump 10 through a vacuum pipeline. The pressure system and the oil storage system are arranged on the carrying system ship 5.
In order to simulate actual floating oil on water, 30L of kerosene is poured onto the water surface of a water tank, the manufactured integrated device is placed on an oil-water interface, a power supply is started, the pressure is adjusted to-0.02 MPa, the integrated device is started, at the moment, as the micro-nano carbon composite non-woven cloth oil absorption material wrapped outside an oil absorption pipe in an oil absorption assembly has strong affinity to oil and simultaneously repels water, the floating oil on the water surface can be absorbed into the oil absorption assembly by the micro-nano carbon composite non-woven cloth oil absorption material and is continuously collected into an oil storage tank through a pipeline by pressure driving, the process simultaneously promotes more oil to be continuously absorbed and collected, and thus continuous-dynamic thin oil film recovery is realized. Tests show that the recovery efficiency of the integrated device prepared by the method on the thin oil film on water can reach 89.2%.
Claims (10)
1. The preparation method of the oil suction pipe is characterized by comprising the following steps of:
s1, preparing micro-nano carbon dispersion liquid: mixing micro-nano carbon with the mass fraction of 0.1-2 wt.% with absolute ethyl alcohol, and ultrasonically oscillating for 1-2 hours at 30 ℃ to obtain a micro-nano carbon dispersion liquid;
s2, preparation of polymer spray: the polymer spraying liquid is prepared from the following components in percentage by mass:
1-6 wt.% of polyvinylidene fluoride
0.5-3 wt.% of stearic acid
91-98.5 wt.% of solvent
The preparation method of the polymer spraying liquid comprises the following steps: adding the stearic acid into the solvent, stirring for 2-4 h at 40-80 ℃, adding the polyvinylidene fluoride into the solution, and continuously stirring for 2h to obtain the polymer spraying liquid;
s3, preparing the micro-nano carbon composite non-woven cloth oil absorption material: cleaning a non-woven fabric in deionized water to remove surface impurities, airing, placing the non-woven fabric in the micro-nano carbon dispersion liquid obtained in the step (1) for soaking for 1-10 min, placing the non-woven fabric in an oven, drying for 1-3 h at 30-80 ℃, and taking out; pouring the polymer spraying liquid obtained in the step (2) into a spray gun, spraying the spraying liquid on two sides of the dried non-woven fabric under the pressure of 0.1-0.5 MPa, arranging the non-woven fabric in a drying oven after spraying, and drying for 48-72 hours at the temperature of 30-80 ℃ to obtain the micro-nano carbon composite non-woven fabric oil absorption material;
s4, preparing an oil suction pipe: and (3) winding the micro-nano carbon composite non-woven cloth oil absorption material obtained in the step (3) on the surface of a porous polymer hollow tube, and bonding the interface with glue to obtain the oil absorption tube, wherein the outer diameter of the porous polymer hollow tube is 1-5cm, the length of the porous polymer hollow tube is 10-50 cm, the diameter of each hole is 0.1-1 cm, and the interval between adjacent holes is 0.1-1 cm. ,
2. the method of claim 1, wherein: in the step S1, the average particle size of the micro-nano carbon is 0.5-10 μm.
3. The method of claim 1, wherein: the material of the non-woven fabric in the step S3 is one or two of polypropylene, polyamide and polyethylene terephthalate which are blended in any proportion.
4. The method of claim 1, wherein: in the step S2, the solvent is any one of N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone and triethyl phosphate or a mixture of two of the N, N-dimethylformamide, N-dimethylacetamide, N-methylpyrrolidone and triethyl phosphate in any proportion.
5. The method of claim 1, wherein: the porous polymer hollow tube is a porous polyvinyl chloride hollow tube, a porous polyurethane hollow tube or a porous polypropylene hollow tube.
6. The method of claim 1, wherein: in step S4, the micro-nano carbon composite non-woven cloth oil absorption material is wound on the surface of the porous polymer hollow tube by 1-2 layers, and the interface is bonded by epoxy resin glue.
7. The utility model provides an integrated device for retrieving surface of water film in succession which characterized in that: comprises a carrying system, an oil storage system, a pressure system and an oil suction component,
the oil storage system and the pressure system are arranged on the carrying system;
the oil storage system comprises an oil storage tank, a pressure gauge, an air release valve and an oil release valve, wherein the pressure gauge is arranged above the oil storage tank and used for monitoring the internal pressure of the tank body; the air release valve is arranged above the side of the oil storage tank, is connected with the pressure system and is used for adjusting the pressure in the tank body; the oil drain valve is arranged below the side of the oil storage tank and used for discharging collected oil products;
the pressure system is connected with the oil storage tank and is used for providing power required by continuously collecting oil products;
the oil absorption assembly floats on an oil-water interface and comprises a connecting pipeline and a plurality of oil absorption pipes prepared by the preparation method of any one of claims 1 to 6, wherein the oil absorption pipes are connected in parallel on the connecting pipeline, the connecting pipeline is a closed pipeline and is connected with one end of a hose through a joint, and the other end of the hose is connected with the oil storage tank.
8. The integrated device as claimed in claim 7, wherein the carrying system is a ship or an unmanned boat, the unmanned boat has a length of 100-.
9. The integrated apparatus of claim 7, wherein the storage tank has a capacity of 50-99L, and the inner diameter of the hose 4 is 0.6-1 cm.
10. The integrated device according to claim 7, wherein the pressure system is a diaphragm vacuum pump with a flow rate of 30-120L/min.
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Application publication date: 20210316 |