CN112239896B - Preparation method and application of polypropylene fiber - Google Patents
Preparation method and application of polypropylene fiber Download PDFInfo
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- CN112239896B CN112239896B CN201910650897.5A CN201910650897A CN112239896B CN 112239896 B CN112239896 B CN 112239896B CN 201910650897 A CN201910650897 A CN 201910650897A CN 112239896 B CN112239896 B CN 112239896B
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- polypropylene
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
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- C—CHEMISTRY; METALLURGY
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
Abstract
The invention discloses a preparation method of polypropylene fibers and the polypropylene fibers prepared by the method, which comprise the following steps: s1, mixing polypropylene resin and an antioxidant, and performing spinning treatment to obtain polypropylene filaments; s2, the polypropylene filaments are subjected to three-stage cooling treatment to obtain the polypropylene fibers. The method has simple and convenient process and short production path, and the polypropylene fiber prepared by the method has moderate pore diameter, high mechanical strength and excellent separation performance, is applied to the treatment of oily sewage, and has high oil removal efficiency on the sewage. The invention also provides a device for treating the oily sewage, which has the advantages of simple structure, less consumption power, good removal effect on the greasy dirt in the sewage without adding any medicament, low pollution and good application prospect in the field of oily sewage treatment.
Description
Technical Field
The invention relates to a preparation method of polypropylene fibers, a polypropylene fiber material prepared by the method and application thereof in treatment of oily sewage, and also relates to a device for treating the oily sewage, belonging to the technical field of water treatment.
Background
The source of the oily sewage is quite wide, and in the petrochemical industry, a large amount of oily sewage can appear in the refining of petroleum and the processing of various materials, and the cleaning and using processes of various pipelines can also form the oily sewage. The discharge of untreated oily sewage into soil or rivers and lakes can lead to environmental deterioration, bring a series of disasters and also severely affect human health. The sewage containing oil is treated and discharged up to the standard, on one hand, two precious resources of oil and water can be saved, the recovery and the reutilization of the resources are realized, and on the other hand, the sewage containing oil has extremely important significance for environmental protection, ecological balance construction, sustainable development of human health and the like.
The coalescing method is an important method for separating oil from water, and is characterized in that the two-phase separation is realized by utilizing the characteristic that the affinities of oil and water are greatly different from each other relative to the coalescing material, the process of the method is to introduce oily sewage into a device filled with the coalescing material, the coalescing effect of oil drops in the material is utilized to realize the enlargement of the oil drops from small to large, and the enlarged oil drops can utilize the density difference between oil and water to realize the floating of the oil drops, so that the purpose of oil-water separation is finally realized. The method has simple treatment process, is a physical process, has small device volume, can not generate new impurities, and can achieve high separation efficiency. The coalescing material selection principle is as follows: the oil resistance is good, and the oil cannot be dissolved or swelled by oil; has certain mechanical strength and is not easy to wear; is not easy to harden and is convenient to wash.
The common coalescing materials comprise plate-shaped, fibrous and loose solid particles, the fibrous materials can be made into aggregates in various forms to be fixed on equipment, the problem of filler loss does not exist, the limit of the particle size of the loose solid particles is broken through, and meanwhile, the fibrous filler has higher porosity (epsilon=0.85-0.99) and has higher separation efficiency than other medium materials. According to the adsorption of oil and water on the surface, the coalesced fibers can be divided into lipophilic and hydrophilic types, and when oily sewage is treated, lipophilic materials are generally preferred, and the materials can enable oil drops in the sewage to be better coalesced on the surface of the materials, so that the separation efficiency is improved. The diameter of the coalescent fiber material can influence the coalescent separation effect, the diameter surface area of the fine material is large, the pore size is small, the promotion effect can be achieved on the coalescent process and the separation efficiency between liquid drops, but when the diameter of the fiber material is too small, the pressure drop of the coalescer is increased, the resistance is correspondingly increased, the pressure is increased, the coalescent separation effect is reduced, and meanwhile, the strength of the material is also influenced due to the too small fiber diameter, so that the service time of equipment is shortened. The polypropylene is a lipophilic and hydrophobic material, has the characteristics of wear resistance, high strength, corrosion resistance, heat resistance, ageing resistance and the like, prepares the polypropylene coalescent fiber material with moderate diameter size, high mechanical strength and excellent separation performance by a simple method, and is applied to oily sewage treatment of refining enterprises.
Disclosure of Invention
The invention aims to provide a preparation method of polypropylene fiber according to the defects in the prior art, the method is simple and convenient in process and short in production path, the polypropylene fiber prepared by the method is moderate in pore diameter, high in mechanical strength and excellent in separation performance, is applied to treatment of oily sewage and is high in oil removal efficiency on sewage, and the device for treating oily sewage is simple in structure, consumes less power, can achieve a good removal effect on oil stains in sewage without adding any medicament, is low in pollution and has good application prospect in the field of oily sewage treatment.
According to one aspect of the present invention, there is provided a method for preparing polypropylene fibers, comprising the steps of:
s1, mixing polypropylene resin and an antioxidant, and performing spinning treatment to obtain polypropylene filaments;
s2, the polypropylene filaments are subjected to three-stage cooling treatment to obtain the polypropylene fibers.
According to some embodiments of the invention, the step S1 includes:
mixing polypropylene resin and an antioxidant, and carrying out melting and defoaming treatment to obtain spinning solution;
and 1B, conveying the spinning solution to a spinneret, and extruding the spinning solution through the spinneret to obtain the polypropylene filaments.
According to the preferred embodiment of the invention, the mass ratio of the polypropylene resin to the antioxidant is (90-99) (1-10), the adding amount of the antioxidant is not more than 10%, the problems of poor compatibility of raw material components and incomplete structure and various performance degradation of the prepared fiber caused by excessive adding amount are avoided, and (95-99) is preferred.
According to the preferred embodiment of the invention, the melt index of the polypropylene resin is 0.5-100g/10min, the fluidity, the processing property and the mechanical property of the polypropylene resin raw material in the melt index range are good, the melt index test condition is that the temperature is 230 ℃, and the load weight is 2.16 kg.
According to a preferred embodiment of the present invention, the antioxidant comprises at least one of antioxidant 1010, antioxidant 1076 and antioxidant 1790. The polypropylene molecule contains tertiary carbon chains, is easy to decompose by heating, and the antioxidant is mainly added to prevent the polypropylene molecule from decomposing so as not to reduce the physical properties of the material. The antioxidant can firstly react with oxygen in the presence of oxygen by means of a reduction reaction, and is itself oxidized to protect the raw material to be protected; some antioxidants are free radical absorbers, i.e., free radical scavengers, which can be combined with the intermediates of the oxidation process, thereby disabling the oxidation reaction; the antioxidant can also release hydrogen ions to destroy and decompose peroxide generated in the oxidation process, so that the oxidation reaction can not be continued.
According to a preferred embodiment of the present invention, the polypropylene resin raw material is dried at 70-90 ℃ for 2-6 hours before use and then mixed with an antioxidant, preferably under nitrogen-introducing conditions. If the drying time is too short, the performance of the prepared polypropylene fiber product is poor; the preparation efficiency is reduced due to excessively long drying time.
According to a preferred embodiment of the invention, the temperature of the melting treatment is 175-230 ℃ for 0.5-3 hours; the time of the defoaming treatment is 0.5-5h.
According to a preferred embodiment of the present invention, the step 1A may be performed as follows: drying polypropylene resin raw material at 70-90 ℃ for 2-6 hours, mixing with antioxidant in a spinning kettle with a stirring device, heating to 175-230 ℃, stirring for 0.5-3 hours under the condition of introducing nitrogen, and uniformly mixing; and stopping stirring, and standing for deaeration for 0.5-5h to obtain the spinning solution.
According to some embodiments of the invention, the spinneret has a pore size of 0.5-2mm, preferably 0.5-1.5mm; the temperature is 140-180deg.C, preferably 150-170deg.C.
According to a preferred embodiment of the present invention, the step 1B may be performed as follows: and filtering the spinning solution, conveying the filtered spinning solution to a spinneret by using a metering pump, and extruding the spinning solution through the spinneret at a constant speed to obtain the polypropylene filaments.
According to some embodiments of the invention, the step S2 includes:
the polypropylene filaments are firstly cooled by staying in a water bath at 80-100 ℃ for 5-20s, then by staying in a water bath at 40-60 ℃ for 1-20s, and finally by staying in a water bath at 5-10 ℃ for 1-20s, so that the polypropylene fibers are prepared.
After the water bath treatment, the polypropylene fiber is wound and collected by a traction wheel.
The invention can furthest reduce the internal stress of the fiber, prevent the phenomena of stress cracking, buckling deformation and the like and improve the mechanical property, the thermal property and the like of the polypropylene fiber by cooling and solidifying the nascent fiber through three-stage different coagulating baths.
According to some embodiments of the invention, the method further comprises the steps of:
s3, respectively soaking the polypropylene fibers with an acid solution and an alkali solution, cleaning and drying.
According to a preferred embodiment of the invention, the acid solution is a hydrochloric acid solution, at a concentration of 0.5-1mol/L, preferably 0.5mol/L; the alkali solution is sodium hydroxide solution with the concentration of 0.5-1mol/L, preferably 0.5mol/L.
According to a preferred embodiment of the present invention, the step S3 may be performed as follows: the prepared polypropylene fiber is soaked in acid solution for 5-10h, then soaked in alkali solution for 5-10h, washed to be neutral by deionized water, and then dried for 12-24h at 60-80 ℃ to remove the surface moisture, thus obtaining the polypropylene fiber.
After the treatment, the pollutants on the surface of the polypropylene fiber can be removed.
According to another aspect of the present invention there is also provided the use of the polypropylene fiber as described above for treating oily sewage comprising passing oily sewage through the polypropylene fiber to separate the oil phase and the water phase therein.
When the oily sewage passes through the polypropylene fiber, oil drops in the sewage are coalesced on the surface of the polypropylene fiber due to different affinities of the oil phase and the water phase to the polypropylene fiber, so that the oil drops are changed from small to large, and the enlarged oil drops float upwards due to smaller density, and further the separation of the oil phase and the water phase is realized.
According to another aspect of the present invention, there is also provided an apparatus for treating oily sewage, comprising:
the liquid storage tank is used for storing oily sewage;
a coalescer connected with the liquid storage tank, wherein the coalescer is filled with the polypropylene fibers and is used for receiving the oily sewage from the liquid storage tank and treating the oily sewage to separate an oil phase and a water phase;
a water producing tank connected to the coalescer for receiving the aqueous phase from the coalescer;
and the oil collecting tank is connected with the coalescer and is used for receiving the oil phase from the coalescer.
According to some embodiments of the invention, the polypropylene fibers are packed into the bed of the coalescer in a packing ratio of 1/2.
According to a preferred embodiment of the invention, the coalescer is provided with a sewage inlet, an aqueous phase outlet and an oil phase outlet. In some specific embodiments, the oil phase outlet is disposed in an upper portion of the coalescer and the aqueous phase outlet is disposed in a sidewall of the coalescer.
According to a preferred embodiment of the invention, the device further comprises a sewage tank arranged between the liquid storage tank and the coalescer, the sewage tank being provided with a sewage inlet, a sewage outlet and a gas inlet, the sewage inlet of which is in communication with the liquid storage tank via a pipe, and the sewage outlet of which is in communication with the inlet of the coalescer via a pipe for receiving sewage from the liquid storage tank and for conveying to the coalescer.
According to a preferred embodiment of the invention, the device further comprises a sewage pump arranged on the pipeline between the liquid storage tank and the sewage tank for pumping the sewage in the liquid storage tank into the sewage tank.
According to a preferred embodiment of the invention, the apparatus further comprises a gas source connected to the gas inlet of the dirty water tank for introducing gas into the dirty water tank for increasing the pressure to push the dirty water into the coalescer. In some specific embodiments, the gas source is a nitrogen cylinder. The air source is connected with the sewage tank through a pipeline, and a pressure stabilizing valve is arranged on the pipeline.
According to a preferred embodiment of the invention, the device further comprises a flow regulating valve, a flow meter and a feed pump arranged in sequence on the conduit between the sewage tank and the coalescer.
According to a preferred embodiment of the invention, the water-producing tank communicates with the water phase outlet of the coalescer by means of a pipe, and the oil-collecting tank communicates with the oil phase outlet of the coalescer by means of a pipe.
The working process and principle of the device for treating the oily sewage are as follows:
pumping oily sewage with the temperature of 30-50 ℃ in a liquid storage tank into a sewage tank through a sewage pump, pumping liquid in the sewage tank into a coalescer through a feed pump, and controlling the inflow water flow to be 0.1-0.5m by adjusting a flow regulating valve 3 Within/h; the oil phase in the sewage is slowly adhered to the surface of the polypropylene fiber, and then is aggregated to form oil drops, the large-particle oil drops are carried by the water phase to leave the surface of the polypropylene fiber, enter the oil collecting tank through the oil phase outlet, and the water phase with the oil phase removed enters the water producing tank through the water phase outlet.
According to another aspect of the present invention, there is provided a method for treating oily sewage using the above apparatus, comprising:
(1) Layering, compacting and filling polypropylene fibers into a bed layer of a coalescer according to a filling ratio of 1/2;
(2) Pumping oily sewage in a liquid storage tank into a sewage tank through a sewage pump;
(3) Opening a flow regulating valve, a flowmeter, a pressure stabilizing valve and an air source, pumping the liquid in the sewage tank into the coalescer through a feed pump,the inflow water flow is controlled to be 0.1-0.5m by adjusting the flow regulating valve 3 Within/h; the oil phase in the sewage is slowly adhered to the surface of the polypropylene fiber, so that oil drops are formed by aggregation, large-particle oil drops are carried by the water phase to leave the surface of the polypropylene fiber, enter the oil collecting tank through the oil phase outlet, and enter the water producing tank through the water phase outlet after the oil phase is removed.
In the technical scheme, the pH value of the oily sewage is 7-8, and the oil content is 1183-1572mg/L.
According to a preferred embodiment of the invention, the temperature of the treated oily wastewater is preferably 30-50 ℃, if the temperature is too high, although this is advantageous for increasing the oil removal rate, long-term high temperature operation may be detrimental to the stability of the fibrous coalescing material.
The invention has the following advantages and beneficial technical effects:
the preparation method of the polypropylene fiber has the advantages of simple and convenient process, short production path, easy operation, low energy consumption and low investment, and is very suitable for large-scale industrial production. The invention can furthest reduce the internal stress of the fiber, prevent the phenomena of stress cracking, buckling deformation and the like and improve the performances of the polypropylene fiber such as mechanics, thermal and oil-water separation and the like by cooling and solidifying the nascent fiber through three-stage different coagulating baths. The polypropylene fiber prepared by the method has moderate pore diameter, high mechanical strength, long service life, excellent separation performance and strong stability, is applied to the treatment of oily sewage, has high oil removal efficiency on sewage, and is also provided with a device for treating oily sewage, simple structure, low consumption power, good removal effect on oil stains in sewage without adding any medicament, low pollution and good application prospect in the field of oily sewage treatment.
Drawings
FIG. 1 is a schematic diagram of an apparatus for treating oily wastewater according to the present invention;
reference numerals illustrate: 1: a gas source; 2: a liquid storage tank; 3: a pressure stabilizing valve; 4: a sewage pump; 5: a sewage tank; 6: a flow regulating valve; 7: a flow meter; 8: a feed pump; 9: a coalescer; 10: a water producing tank; 11: oil collecting tank.
Detailed Description
The present invention is described below with reference to specific examples, which are not intended to limit the scope of the present invention, but rather, those skilled in the art can make various insubstantial improvements and modifications in light of the above teachings.
Unless otherwise indicated, all the starting materials used in the examples were commercially available.
The testing method comprises the following steps:
the test of the mechanical properties of the fibers was carried out using the 3342 universal material tester from INSTRON corporation of united states.
The oil content in water is measured according to the national standard GB/T16488-1996 determination of oil quality and animal and vegetable oil;
the oil removal rate is calculated as follows:
wherein C is 0 Represents the oil content of the oily sewage in the sewage tank, mg/L;
c represents the oil content of the water phase in the water producing tank and mg/L.
As shown in fig. 1, the device for treating oily sewage of the invention comprises a gas source 1, a liquid storage tank 2, a pressure stabilizing valve 3, a sewage pump 4, a sewage tank 5, a flow regulating valve 6, a flowmeter 7, a feed pump 8, a coalescer 9, a water producing tank 10 and a liquid collecting tank 11.
Wherein, the liquid storage tank 2 is used for storing oily sewage, the temperature of the sewage is 30-50 ℃, and the sewage is connected with the sewage pump 4 in sequence through a pipeline; the sewage pump 4 is used for pumping the oily sewage in the liquid storage tank 2 into the sewage tank 5 through a pipeline and a sewage inlet of the sewage tank 5. The gas source 1 is connected to the gas inlet of the sewage tank 5 by a pipe on which a pressure stabilizing valve 3 is provided, in the embodiment of the invention the gas source 1 is preferably a nitrogen cylinder. The sewage outlet of the sewage tank 5 is connected with a feeding pump 8 through a pipeline, a flow regulating valve 6 and a flowmeter 7 are sequentially arranged on the pipeline, and the feeding pump is connected with the inlet of a coalescer 9 through a pipeline and is used for pumping the sewage in the sewage tank 5 into the coalescer 9 for treatment. The coalescer 9 is filled with polypropylene fibers to treat sewage and separate oil phase and water phase. The coalescer comprises an oil phase outlet and a water phase outlet, wherein the oil phase outlet is connected with the oil collecting tank 11 through a pipeline, and the water phase outlet is connected with the water producing tank 10 through a pipeline.
Examples 1 to 39 and comparative examples 1 to 22
(1) Drying polypropylene master batch, adding the polypropylene master batch into a spinning kettle with a stirring device, mixing with an antioxidant in proportion, heating to a certain temperature for melting, stirring for a certain time under the condition of introducing nitrogen, stopping stirring, standing for a certain period of time, and defoaming to obtain the polypropylene spinning solution.
(2) After the spinning solution is filtered by a filter screen, the spinning solution is conveyed to a spinneret by a metering pump, then the spinning solution melt is extruded at a constant speed to form polypropylene fiber filaments, the filaments are cooled in a three-stage water bath, and then the polypropylene fiber filaments are collected by winding with a traction wheel.
(3) The prepared polypropylene fiber is soaked for a period of time by using 0.5mol/L HCI solution, then soaked for a period of time by using 0.5mol/L NaOH solution, then washed to be neutral by deionized water, dried in an oven, and the moisture adsorbed on the surface is removed, so that the polypropylene coalesced fiber is prepared.
The data of each step are shown in Table 1.
Examples 40 to 82 and comparative examples 23 to 48
The oily wastewater of a certain refining enterprise is treated by adopting the device shown in FIG. 1, wherein the pH value of the wastewater is 7.0, and the oil content is 1366mg/L.
(1) The polypropylene fibers prepared in examples 1-39 and comparative examples 1-23 were packed into the bed of the coalescer in a packing ratio of 1/2, respectively, in a layered compaction.
(2) Pumping the oily sewage with the temperature of 30-50 ℃ in the liquid storage tank into a sewage tank through a sewage pump;
(3) Opening a flow regulating valve, a force and pressure stabilizing valve and an air source, pumping liquid in a sewage tank into a coalescer through a feed pump, and controlling the inflow water flow to be 0.1-0.5m by regulating the flow regulating valve 3 /h。
And measuring data after running is stable, and calculating to obtain the oil removal rate.
The data of each example and comparative example are shown in Table 2.
Any numerical value recited in this disclosure includes all values incremented by one unit from the lowest value to the highest value if there is only a two unit interval between any lowest value and any highest value. For example, if the amount of one component, or the value of a process variable such as temperature, pressure, time, etc., is stated to be 50-90, it is meant in this specification that values such as 51-89, 52-88 … …, and 69-71, and 70-71 are specifically recited. For non-integer values, 0.1, 0.01, 0.001 or 0.0001 units may be considered as appropriate. This is only a few examples of the specific designations. In a similar manner, all possible combinations of numerical values between the lowest value and the highest value enumerated are to be considered to be disclosed in this application.
It should be noted that the above-described embodiments are only for explaining the present invention and do not constitute any limitation of the present invention. The invention has been described with reference to exemplary embodiments, but it is understood that the words which have been used are words of description and illustration, rather than words of limitation. Modifications may be made to the invention as defined in the appended claims, and the invention may be modified without departing from the scope and spirit of the invention. Although the invention is described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, as the invention extends to all other means and applications which perform the same function.
Claims (12)
1. A method for preparing polypropylene fibers, comprising the steps of:
s1, drying polypropylene resin at 70-90 ℃ for 2-6 hours, mixing the polypropylene resin with an antioxidant, and extruding the mixture through a spinneret to obtain polypropylene filaments;
s2, subjecting the polypropylene filaments to three-stage cooling treatment to obtain the polypropylene fibers;
the aperture of the spinneret is 0.5-2mm;
the melt index of the polypropylene resin is 0.5-100g/10min.
2. The method according to claim 1, wherein the step S1 comprises:
mixing polypropylene resin and an antioxidant, and carrying out melting and defoaming treatment to obtain spinning solution;
and 1B, conveying the spinning solution to a spinneret, and extruding the spinning solution through the spinneret to obtain the polypropylene filaments.
3. The preparation method according to claim 1 or 2, wherein the mass ratio of the polypropylene resin to the antioxidant is (90-99): 1-10.
4. The method according to claim 3, wherein the mass ratio of the polypropylene resin to the antioxidant is (95-99): 1-5.
5. The method according to claim 2 or 4, wherein the melting treatment is carried out at a temperature of 175 to 230 ℃ for a time of 0.5 to 3 hours; the time of the defoaming treatment is 0.5-2h.
6. The method of claim 2 or 4, wherein the spinneret temperature is 140-180 ℃.
7. The method of claim 6, wherein the spinneret has a pore size of 0.5-1.5mm; and/or a temperature of 150-170 ℃.
8. The preparation method according to claim 1 or 2, wherein the step S2 comprises:
the polypropylene filaments are firstly cooled by a water bath at 80-100 ℃, then cooled by a water bath at 40-60 ℃, and finally cooled by a water bath at 5-10 ℃ to prepare the polypropylene fibers.
9. The method of preparation according to claim 1 or 2, characterized in that the method further comprises the steps of:
s3, respectively soaking the polypropylene fibers with an acid solution and an alkali solution, cleaning and drying.
10. A polypropylene fiber prepared according to the method of any one of claims 1-9.
11. Use of polypropylene fibers prepared according to any one of claims 1 to 9 in the treatment of oily wastewater comprising passing oily wastewater through the polypropylene fibers to separate the oil phase and the water phase therein.
12. An apparatus for treating oily wastewater, comprising:
the liquid storage tank is used for storing oily sewage;
a coalescer connected to the tank filled with polypropylene fibers prepared according to the method of any one of claims 1-9 for receiving oily wastewater from the tank and treating it to separate the oil phase and the water phase therein;
a water producing tank connected to the coalescer for receiving the aqueous phase from the coalescer;
and the oil collecting tank is connected with the coalescer and is used for receiving the oil phase from the coalescer.
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| CN102383215B (en) * | 2011-08-10 | 2013-01-09 | 天津工业大学 | Manufacturing method for polyolefin fiber for adsorbing organic liquid |
| CN105733093B (en) * | 2016-03-28 | 2018-12-04 | 中国石油化工股份有限公司 | A kind of high-flowability polypropylene fiber is resin dedicated and preparation method thereof |
| CN107540105B (en) * | 2016-06-28 | 2020-10-27 | 宝山钢铁股份有限公司 | Oil removing method and device for cold rolling concentrated oil emulsion wastewater |
| CN107385558A (en) * | 2017-08-10 | 2017-11-24 | 吉林省华纺静电材料科技有限公司 | A kind of multi-functional polypropene staple and its production technology |
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| 娄春华等.通用合成纤维.《高分子科学导论（第2版）》.2019, * |
| 洪定一.聚丙烯长纤维的生产工艺.《聚丙烯-原理、工艺与技术》.2002, * |
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