CN111377578A - Wastewater treatment and purification process for chain production - Google Patents
Wastewater treatment and purification process for chain production Download PDFInfo
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- CN111377578A CN111377578A CN202010162952.9A CN202010162952A CN111377578A CN 111377578 A CN111377578 A CN 111377578A CN 202010162952 A CN202010162952 A CN 202010162952A CN 111377578 A CN111377578 A CN 111377578A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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Abstract
The application provides a wastewater treatment and purification process for chain production, and relates to the technical field of wastewater treatment. The method comprises the following steps: performing spiral sand settling treatment on the wastewater in the wastewater tank; adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and mixing the ester base oil with saponin powder, mineral oil and vaseline in the wastewater pool at 120-150 ℃ for 1-2h to obtain a chain oil composition (a) in the wastewater pool; filtering and extracting the chain oil composition (a) from a wastewater pool; and (2) adding an oil stain purifying agent (b) into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano tubes, so that the wastewater oil stain and the saponin powder in the wastewater are recycled, and the recycled wastewater in the wastewater pool is purified by the oil stain purifying agent (b) finally, so that the wastewater purification process is realized.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a wastewater treatment and purification process for chain production.
Background
Chains, generally metallic links or rings, are used mostly as mechanical transmission, traction, as chains for mechanical transmission, or as links obstructing traffic passages, such as in streets, rivers or harbour entrances; the method comprises the following steps of removing a large amount of silt, oil stain and saponin powder from the barreled waste water in the chain production process, wherein the barreled waste water is subjected to high-pressure flushing and spiral sand settling treatment at first, and then is subjected to EDUR air flotation, h/o biochemical treatment, inclined tube sedimentation and sand filtration treatment with domestic sewage, so that the quality of the discharged water finally reaches the standard of Integrated wastewater discharge Standard (GB 8978-1996), but the existing waste water treatment and purification process is complex and wastes social resources;
therefore, a technique for recycling waste water and purifying the waste water is urgently required to be proposed.
Disclosure of Invention
The embodiment of the application provides a waste water treatment purification process for chain production for the above-mentioned technical problem who solves, and the waste water of output recycles in the production of chain when realizing producing the chain to reach the purification process to waste water at the in-process of recycling.
In order to solve the technical problem, the wastewater treatment and purification process for chain production in the embodiment of the application adopts the following technical scheme:
a wastewater treatment and purification process for chain production comprises the following steps:
carrying out spiral sand settling treatment on the wastewater in the wastewater tank;
adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and mixing the ester base oil with saponin powder, mineral oil and vaseline in the wastewater pool at the temperature of 120-150 ℃ for 1-2h to obtain a chain oil composition (a) in the wastewater pool;
filtering and extracting the chain oil composition (a) from the wastewater pond;
and (b) adding an oil stain purifying agent into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano-tubes.
Further, the step of adding an ester base oil to the wastewater pond comprises:
and adding ester base oil, an extreme pressure anti-wear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into the wastewater pool.
Further, the viscosity index improver adopts at least one of high-viscosity composite ester oil, polyisobutylene, styrene-isoprene copolymer, ethylene propylene polymer and polyisoprene copolymer.
Further, the extreme pressure antiwear agent is an alkoxy phosphate extreme pressure antiwear agent;
further, the antioxidant comprises an amine antioxidant, a phenolic antioxidant or a mixture thereof.
Further, the composition added into the wastewater tank comprises the following components in percentage by weight: the content of the ester base oil is 25-38%, the content of the extreme pressure antiwear agent is 0.1-3%, the content of the viscosity index improver is 1-10% by mass, the content of the antioxidant is 0.1-2%, and the content of the anticorrosive agent is 0.01-0.5% by mass;
mineral oil and vaseline in the wastewater pool are used as oiliness agents, and the content of the oiliness agents is 30.1-52%;
the saponin powder in the wastewater pool is used as a tensile material, and the content of the tensile material is 10-20%.
Further, the preparation method of the oil stain purifying agent (b) comprises the following steps:
mixing butyl titanate, a carbon nano tube, brucite fiber, carboxylated nano-crystalline cellulose, absolute ethyl alcohol, toluene and ferroferric oxide magnetic particles according to the mass ratio of 1: 0.1-0.2: 0.2-0.4: 10-30: 0.01-0.03: 0.02-0.04 to prepare a first solution;
mixing absolute ethyl alcohol, 0.5-1.5mol/L glacial acetic acid and water according to the mass ratio of 10-20:4-6:1 to prepare a solution B;
carrying out ultrasonic oscillation treatment on the solution A at 50-60 ℃, dropwise adding the solution B into the solution A with the mass of 2 times, and stirring for 1-2h to obtain sol solution coated with ferroferric oxide magnetic particles;
aging the sol solution for 24-48h at room temperature, adding absolute ethyl alcohol into the sol solution for solvent replacement for 24-48h, then adding n-hexane into the sol solution for solvent replacement for 24-48h, separating and removing the n-hexane to obtain wet gel coated with ferroferric oxide magnetic particles, and performing hydrophobic modification on the wet gel by using a mixed solution of an organic silicon compound and the n-hexane;
and then drying to obtain the composite aerogel coated with the ferroferric oxide magnetic particles, and preparing the composite aerogel into granules to obtain the oil stain purifying agent.
Further, the preparation method of the carboxylated nanocrystalline cellulose comprises the following steps: mixing 1 part by weight of microcrystalline cellulose with 40-45 parts by weight of ammonium persulfate solution with the concentration of 0.5-1.5mol/L, soaking for 10-20min, and carrying out ultrasonic stirring treatment on the mixed solution for 25-35min to obtain suspension, wherein the ultrasonic frequency is 45-55KHz, and the temperature is 45-55 ℃; and (2) centrifuging the suspension, washing the obtained solid to be neutral, adding the solid into 30-40 parts by weight of 1mol/L citric acid solution for dissolving, reacting for 150-200min under the ultrasonic stirring condition, and centrifuging, washing, dissolving and dialyzing the reaction product to obtain the carboxylated nanocrystalline cellulose.
Further, the preparation method of the ferroferric oxide magnetic particles comprises the following steps: adding 100 weight parts of water into a container, and introducing nitrogen at 55-65 deg.C for 15-25 min; dissolving 0.5-0.55 part by weight of FeCl 3.6H 2O and 0.19-0.20 part by weight of FeCl 2.4H 2O in 10 parts by weight of water, introducing nitrogen, adding into the container, adjusting the pH value to 9-10 with ammonia water, reacting for 10-15min to generate ferroferric oxide magnetic particles, sucking the ferroferric oxide magnetic particles by a magnet through the wall of the container, pouring out liquid, washing the ferroferric oxide magnetic particles, and performing vacuum freeze drying.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
performing spiral sand settling treatment on the wastewater in the wastewater tank; adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and mixing the ester base oil with saponin powder, mineral oil and vaseline in the wastewater pool at 120-150 ℃ for 1-2h to obtain a chain oil composition (a) in the wastewater pool; filtering and extracting the chain oil composition (a) from a wastewater pool; and (2) adding an oil stain purifying agent (b) into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano tubes, so that the wastewater oil stain and the saponin powder in the wastewater are recycled, and the recycled wastewater in the wastewater pool is purified by the oil stain purifying agent (b) finally, so that the wastewater purification process is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a process flow diagram of the wastewater treatment and purification process for chain production according to the present invention.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It is noted that the terms "comprises," "comprising," and "having" and any variations thereof in the description and claims of this application and the drawings described above are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. In the claims, the description and the drawings of the specification of the present application, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity/action/object from another entity/action/object without necessarily requiring or implying any actual such relationship or order between such entities/actions/objects.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the relevant drawings in the embodiments of the present application.
Referring to the attached figure 1, the invention provides a process flow chart of a wastewater treatment and purification process for chain production;
the waste water treatment and purification process for chain production comprises the following steps:
s1, carrying out spiral sand settling treatment on the wastewater in the wastewater tank;
s2, adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and the ester base oil, saponin powder, mineral oil and vaseline in the wastewater pool are mixed for 1-2h at 120-150 ℃ to obtain a chain oil composition (a) in the wastewater pool;
s3, filtering and extracting the chain oil composition (a) from the wastewater pool;
s4, adding an oil stain purifying agent (b) into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano-tubes.
The ester base oil of the present invention is a mixture of pentaerythritol ester and aromatic ester, and examples of the aromatic ester include trimellitic acid ester and phthalic acid diester. The content of the synthetic ester base oil is 85-98 mass%, preferably 90-95 mass%, calculated by taking the total mass of the chain oil composition as 100%; in the invention, the mass ratio of the pentaerythritol ester to the aromatic ester is 1: 4-4: 1, preferably 1: 3-3: 1; the kinematic viscosity of the ester base oil at 40 ℃ is 50-400 mm2(ii) s, preferably 100 to 380mm2And s. As used herein, kinematic viscosity at 40 ℃ refers to kinematic viscosity at 40 ℃ as determined according to GB/T265-1988. If the kinematic viscosity at 40 ℃ of the ester base oil exceeds 400mm2S, which affects the permeability and jetting properties of the chain oil composition and does not provide sufficient lubrication to the chain; if the kinematic viscosity at 40 ℃ is less than 50mm2And/s, the resulting chain oil composition has poor lubricity at the lubrication sites and greater evaporation loss.
Therefore, the pentaerythritol ester selected by the invention is the base oil with the best high-temperature performance at present, has lower evaporation loss and carbon residue, and is not easy to coke. The aromatic ester has an aromatic ring structure, so that the aromatic ester can show better high-temperature oxidation resistance, can also increase the compatibility with additives, and has low cost. According to the invention, the pentaerythritol ester and the aromatic ester are blended, so that the advantages of the pentaerythritol ester and the aromatic ester can be fully exerted, and the chain oil composition (a) with excellent comprehensive performance is prepared.
In the steps S1-S2, preventing silt from influencing the reaction, firstly carrying out spiral silt settling on the wastewater pool to deposit the silt at the bottom of the wastewater pool, adding ester base oil into the wastewater pool at the moment, and mixing for 1-2 hours at the temperature of 120-150 ℃ to obtain the chain oil composition (a) in the wastewater pool; in a preferred embodiment, ester base oil, extreme pressure antiwear agent, viscosity index improver, antioxidant and anticorrosive agent are added into a wastewater pool, and the chain oil composition (a) is coated on a chain to improve the heat resistance and the lubricity of the chain.
In the steps S3-S4, the chain oil composition (a) is extracted from the wastewater pool, and the filtering of oil and silt is realized by adopting a tubular membrane, so that the tubular membrane is different from a common filter membrane, the performance of the filtered oil is more remarkable, and after the chain oil composition (a) is extracted, the oil stain purifying agent (b) is added into the wastewater pool to realize the purification of the wastewater pool.
The oil stain purifying agent (b) is prepared from butyl titanate, carbon nano tubes, brucite fibers, carboxylated nano-crystalline cellulose, absolute ethyl alcohol, toluene, ferroferric oxide magnetic particles and 0.5-1.5mol/L glacial acetic acid;
the preparation method of the oil stain purifying agent (b) comprises the following steps:
butyl titanate, carbon nano tube, brucite fiber, carboxylated nano-crystalline cellulose, absolute ethyl alcohol, toluene and ferroferric oxide magnetic particles are mixed according to the mass ratio
1: 0.1-0.2: 0.2-0.4: 10-30: 0.01-0.03: 0.02-0.04 to prepare a first solution;
mixing absolute ethyl alcohol, 0.5-1.5mol/L glacial acetic acid and water according to the mass ratio of 10-20:4-6:1 to prepare a solution B;
carrying out ultrasonic oscillation treatment on the solution A at 50-60 ℃, dropwise adding the solution B into the solution A with the mass of 2 times, and stirring for 1-2h to obtain sol solution coated with ferroferric oxide magnetic particles;
aging the sol solution for 24-48h at room temperature, adding absolute ethyl alcohol into the sol solution for solvent replacement for 24-48h, then adding n-hexane into the sol solution for solvent replacement for 24-48h, separating and removing the n-hexane to obtain wet gel coated with ferroferric oxide magnetic particles, and performing hydrophobic modification on the wet gel by using a mixed solution of an organic silicon compound and the n-hexane;
and then drying to prepare the composite aerogel coated with the ferroferric oxide magnetic particles, and preparing the composite aerogel into granules to obtain the oil stain purifying agent (b).
The oil stain purifying agent (b) is added into the wastewater tank, the oil stain purifying agent (b) has high adsorption efficiency on oil stains and heavy metals in the wastewater tank, the purifying agent does not need to be recovered, and secondary pollution to a water body is avoided.
The viscosity index improver adopts at least one of high-viscosity composite ester oil, polyisobutylene, styrene-isoprene copolymer, ethylene-propylene polymer and polyisoprene copolymer.
The viscosity index improver of the present invention preferably has a viscosity index of 250 or more. When the viscosity index is within the range, the viscosity index of the chain oil composition can be greatly improved, the oil product adhesiveness can be effectively improved, the oil can be firmly adhered to a friction surface, and the falling chance is reduced. If the viscosity index is lower than 200, the viscosity-temperature performance of the chain oil composition cannot be effectively improved, so that the adhesion of oil products is poor, the oil products are easy to flow off, and the chain is dry-ground. The viscosity index referred to herein denotes the viscosity index measured according to GB/T1995-1998.
The extreme pressure antiwear agent is an alkoxy phosphate extreme pressure antiwear agent;
in the invention, the alkoxy phosphate extreme pressure antiwear agent is used as the extreme pressure antiwear agent, so that the antiwear performance of the chain oil composition is greatly improved, and compared with other common antiwear agents, the alkoxy phosphate extreme pressure antiwear agent can greatly improve the maximum non-seizure load PB value of a four-ball test under the same condition.
The antioxidant includes amine antioxidant, phenol antioxidant or their mixture.
The chain oil composition comprises an antioxidant, wherein the antioxidant comprises an amine antioxidant, a phenol antioxidant or a mixture of the amine antioxidant and the phenol antioxidant, and specifically, the antioxidant comprises at least one of p, p-dioctyl diphenylamine, alkylated phenyl- α -naphthylamine and high molecular thioether phenol, and the antioxidants have high-temperature performance and can better play a role at a temperature of more than 200 ℃.
In addition, the above-mentioned anticorrosive agent includes a carboxylic acid derivative or a carboxylic acid ester derivative, and for example, dodecenylsuccinic acid, alkenylsuccinic acid ester, and the like are preferable.
The preparation method of the carboxylated nano-crystalline cellulose in the oil stain purifying agent (b) comprises the following steps: mixing 1 part by weight of microcrystalline cellulose with 40-45 parts by weight of ammonium persulfate solution with the concentration of 0.5-1.5mol/L, soaking for 10-20min, and carrying out ultrasonic stirring treatment on the mixed solution for 25-35min to obtain suspension, wherein the ultrasonic frequency is 45-55KHz, and the temperature is 45-55 ℃; centrifuging the suspension, washing the obtained solid to be neutral, adding the solid into 30-40 parts by weight of citric acid solution with the concentration of 1mol/L for dissolving, reacting for 150-200min under the ultrasonic stirring condition, and centrifuging, washing, dissolving and dialyzing the reaction product to obtain the carboxylated nano-crystalline cellulose.
The preparation method of the carboxylated nano-crystalline cellulose in the oil stain purifying agent (b) comprises the following steps: the preparation method of the ferroferric oxide magnetic particles comprises the following steps: adding 100 weight parts of water into a container, and introducing nitrogen at 55-65 deg.C for 15-25 min; dissolving 0.5-0.55 part by weight of FeCl3 & 6H2O and 0.19-0.20 part by weight of FeCl2 & 4H2O in 10 parts by weight of water, introducing nitrogen, adding into a container, adjusting the pH value to 9-10 with ammonia water, reacting for 10-15min to generate ferroferric oxide magnetic particles, sucking the ferroferric oxide magnetic particles by a magnet through the wall of the container, pouring out liquid, washing the ferroferric oxide magnetic particles, and performing vacuum freeze drying.
The composition ratio added into the wastewater tank is as follows: the content of the ester base oil is 25-38%, the content of the extreme pressure antiwear agent is 0.1-3%, the content of the viscosity index improver is 1-10%, the content of the antioxidant is 0.1-2%, and the content of the anticorrosive agent is 0.01-0.5% by mass;
mineral oil and vaseline in the wastewater pool are used as oiliness agents, and the content of the oiliness agents is 30.1-52%;
the saponin powder in the wastewater pool is used as a tensile material, and the content of the tensile material is 10-20%.
Example 1:
after spiral sand settling, adding ester base oil, an extreme pressure antiwear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into a wastewater pool;
the composition comprises, by mass, 25% of an ester base oil, 3% of an extreme pressure antiwear agent, 10% of a viscosity index improver, 2% of an antioxidant, 0.5% of an anticorrosive agent, 52% of an oiliness agent comprising mineral oil and vaseline in a wastewater tank, and 52% of an oiliness agent comprising saponin powder in the wastewater tank, 20% of a tensile material, and the balance of water in the wastewater tank, wherein the chain oil composition (a1) is obtained by mixing the components at a mixing temperature of 120-150 ℃ for 1-2 hours.
Example 2:
after spiral sand settling, adding ester base oil, an extreme pressure antiwear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into a wastewater pool;
the composition comprises, by mass, 38% of an ester base oil, 0.1% of an extreme pressure antiwear agent, 1% of a viscosity index improver, 0.3% of an antioxidant, 0.5% of an anticorrosive agent, 30.1% of an oiliness agent comprising mineral oil and vaseline in a wastewater tank, 20% of an anti-tensile material comprising saponin powder in the wastewater tank, and the balance of water in the wastewater tank, and is mixed at a mixing temperature of 120-150 ℃ for 1-2 hours to obtain a chain oil composition (a 2).
Example 3:
after spiral sand settling, adding ester base oil, an extreme pressure antiwear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into a wastewater pool;
the composition comprises, by mass, 40% of an ester base oil, 2% of an extreme pressure antiwear agent, 1% of a viscosity index improver, 0.3% of an antioxidant, 0.5% of an anticorrosive agent, 40% of an oiliness agent comprising mineral oil and vaseline in a wastewater tank, and 40% of an oiliness agent comprising saponin powder in the wastewater tank as a tensile material, 10% of the tensile material, and the balance of water in the wastewater tank, wherein the chain oil composition (a3) is obtained by mixing the components at a mixing temperature of 120-150 ℃ for 1-2 hours.
Example 4:
after spiral sand settling, adding ester base oil, an extreme pressure antiwear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into a wastewater pool;
the composition comprises, by mass, 45% of an ester base oil, 0.1% of an extreme pressure antiwear agent, 1% of a viscosity index improver, 0.3% of an antioxidant, 0.5% of an anticorrosive agent, 45% of an oiliness agent which is mineral oil and vaseline in a wastewater tank, and 45% of an oiliness agent which is saponin powder in the wastewater tank, 10% of a tensile material, and the balance of water in the wastewater tank, wherein the chain oil composition (a4) is obtained after mixing the components at a mixing temperature of 120-150 ℃ for 1-2 hours.
Referring to table 1, the test results of the chain oil compositions (a1) to (a4) are shown.
Table 1:
in conclusion, the wastewater in the wastewater tank is subjected to spiral sand settling treatment; adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and mixing the ester base oil with saponin powder, mineral oil and vaseline in the wastewater pool at 120-150 ℃ for 1-2h to obtain a chain oil composition (a) in the wastewater pool; filtering and extracting the chain oil composition (a) from a wastewater pool; and (2) adding an oil stain purifying agent (b) into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano tubes, so that the wastewater oil stain and the saponin powder in the wastewater are recycled, and the recycled wastewater in the wastewater pool is purified by the oil stain purifying agent (b) finally, so that the wastewater purification process is realized.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All other embodiments that can be obtained by a person skilled in the art based on the embodiments in this application without any creative effort and all equivalent structures made by using the contents of the specification and the drawings of this application can be directly or indirectly applied to other related technical fields and are within the scope of protection of the present application.
Claims (9)
1. The wastewater treatment and purification process for chain production is characterized by comprising the following steps of:
carrying out spiral sand settling treatment on the wastewater in the wastewater tank;
adding ester base oil into the wastewater pool, wherein the ester base oil is a mixture of pentaerythritol ester and aromatic ester, and mixing the ester base oil with saponin powder, mineral oil and vaseline in the wastewater pool at the temperature of 120-150 ℃ for 1-2h to obtain a chain oil composition (a) in the wastewater pool;
filtering and extracting the chain oil composition (a) from the wastewater pond;
and (b) adding an oil stain purifying agent into the wastewater pool, and carrying out purification reaction for 10-17 h, wherein the oil stain purifying agent is formed by mixing titanium dioxide, brucite fiber, hydroxylated nano-cellulose and carbon nano-tubes.
2. The wastewater treatment and purification process for chain production according to claim 1, wherein the step of adding the ester base oil to the wastewater tank comprises:
and adding ester base oil, an extreme pressure anti-wear agent, a viscosity index improver, an antioxidant and an anticorrosive agent into the wastewater pool.
3. The wastewater treatment and purification process for chain production according to claim 2, wherein the viscosity index improver adopts at least one of high-viscosity composite ester oil, polyisobutylene, styrene-isoprene copolymer, ethylene propylene polymer and polyisoprene copolymer.
4. The process for treating and purifying the wastewater for the chain production as claimed in claim 2, wherein the extreme pressure antiwear agent is an alkoxy phosphate extreme pressure antiwear agent;
5. the process for treating and purifying wastewater for chain production according to claim 2, wherein the antioxidant comprises amine antioxidant, phenol antioxidant or a mixture thereof.
6. The wastewater treatment and purification process for chain production according to claim 2, wherein the composition added to the wastewater tank comprises the following components in percentage by weight: the content of the ester base oil is 25-38%, the content of the extreme pressure antiwear agent is 0.1-3%, the content of the viscosity index improver is 1-10% by mass, the content of the antioxidant is 0.1-2%, and the content of the anticorrosive agent is 0.01-0.5% by mass;
mineral oil and vaseline in the wastewater pool are used as oiliness agents, and the content of the oiliness agents is 30.1-52%;
the saponin powder in the wastewater pool is used as a tensile material, and the content of the tensile material is 10-20%.
7. The wastewater treatment and purification process for chain production according to claim 1, wherein the oil stain purifying agent (b) is prepared by a method comprising the following steps:
mixing butyl titanate, a carbon nano tube, brucite fiber, carboxylated nano-crystalline cellulose, absolute ethyl alcohol, toluene and ferroferric oxide magnetic particles according to the mass ratio of 1: 0.1-0.2: 0.2-0.4: 10-30: 0.01-0.03: 0.02-0.04 to prepare a first solution;
mixing absolute ethyl alcohol, 0.5-1.5mol/L glacial acetic acid and water according to the mass ratio of 10-20:4-6:1 to prepare a solution B;
carrying out ultrasonic oscillation treatment on the solution A at 50-60 ℃, dropwise adding the solution B into the solution A with the mass of 2 times, and stirring for 1-2h to obtain sol solution coated with ferroferric oxide magnetic particles;
aging the sol solution for 24-48h at room temperature, adding absolute ethyl alcohol into the sol solution for solvent replacement for 24-48h, then adding n-hexane into the sol solution for solvent replacement for 24-48h, separating and removing the n-hexane to obtain wet gel coated with ferroferric oxide magnetic particles, and performing hydrophobic modification on the wet gel by using a mixed solution of an organic silicon compound and the n-hexane;
and then drying to obtain the composite aerogel coated with the ferroferric oxide magnetic particles, and preparing the composite aerogel into granules to obtain the oil stain purifying agent.
8. The wastewater treatment and purification process for chain production according to claim 7, wherein the preparation method of the carboxylated nanocrystalline cellulose comprises the following steps: mixing 1 part by weight of microcrystalline cellulose with 40-45 parts by weight of ammonium persulfate solution with the concentration of 0.5-1.5mol/L, soaking for 10-20min, and carrying out ultrasonic stirring treatment on the mixed solution for 25-35min to obtain suspension, wherein the ultrasonic frequency is 45-55KHz, and the temperature is 45-55 ℃; and (2) centrifuging the suspension, washing the obtained solid to be neutral, adding the solid into 30-40 parts by weight of 1mol/L citric acid solution for dissolving, reacting for 150-200min under the ultrasonic stirring condition, and centrifuging, washing, dissolving and dialyzing the reaction product to obtain the carboxylated nanocrystalline cellulose.
9. The wastewater treatment and purification process for chain production according to claim 7, wherein the preparation method of the ferroferric oxide magnetic particles comprises the following steps: adding 100 weight parts of water into a container, and introducing nitrogen at 55-65 deg.C for 15-25 min; dissolving 0.5-0.55 part by weight of FeCl 3.6H 2O and 0.19-0.20 part by weight of FeCl 2.4H 2O in 10 parts by weight of water, introducing nitrogen, adding into the container, adjusting the pH value to 9-10 with ammonia water, reacting for 10-15min to generate ferroferric oxide magnetic particles, sucking the ferroferric oxide magnetic particles by a magnet through the wall of the container, pouring out liquid, washing the ferroferric oxide magnetic particles, and performing vacuum freeze drying.
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