CN110540876A - waste mineral oil decoloring and refining process and operation method thereof - Google Patents
waste mineral oil decoloring and refining process and operation method thereof Download PDFInfo
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- CN110540876A CN110540876A CN201910768229.2A CN201910768229A CN110540876A CN 110540876 A CN110540876 A CN 110540876A CN 201910768229 A CN201910768229 A CN 201910768229A CN 110540876 A CN110540876 A CN 110540876A
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- mineral oil
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
- C10G67/02—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only plural serial stages only
- C10G67/14—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only plural serial stages only including at least two different refining steps in the absence of hydrogen
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/202—Heteroatoms content, i.e. S, N, O, P
Abstract
the invention discloses a waste mineral oil decolouring refining process and its operation method, firstly pumping the waste mineral oil to a pretreatment tank, filtering, settling and dewatering, then entering a water washing tank, adding alkali liquor, water and demulsifier into the water washing tank to remove organic acid and water-soluble additive in the oil, then separating oil from water, further hydrodechlorinating the waste mineral oil, decompressing the waste mineral oil raw material, then entering a vacuum distillation tower to separate different fractions of mineral oil base oil, finally packaging the finished refined oil in an oil barrel, sticking a label, and conveniently storing and selling, the invention has simple operation steps, good catalytic effect in the hydrofining step, thorough reaction, uniform mineral oil component after treatment, high product quality, convenient and rapid finished product storage and transportation, and the method is beneficial to large-scale treatment of equipment, continuous operation can obtain better environmental benefit and economic benefit.
Description
Technical Field
the invention relates to the technical field of waste mineral oil recycling, in particular to a waste mineral oil decoloring and refining process and an operation method thereof.
background
mineral oil currently utilizes the most widely chemical substances worldwide, but waste oil generated after the mineral oil is used is not easy to treat, and a plurality of harmful substances such as polycyclic aromatic hydrocarbon are generated in the waste mineral oil and have strong carcinogenic effect; chlorine-containing polycyclic aromatic hydrocarbons such as polychlorinated biphenyl (PCB) and waste mineral oil also contain a plurality of heavy metal additives and chlorine, sulfur and phosphorus-containing organic matters which are added for improving the performance of oil materials, can cause serious pollution to water and soil, endanger the growth of animals and plants and the living environment of human beings, and are listed as high-risk wastes which are managed by the nation with priority. But the deteriorated part of the used lubricating oil is less than 10%, and fuel oil and lubricant base oil for industrial power can be produced. Therefore, the comprehensive utilization of the waste mineral oil has very important significance for relieving the situation of resource shortage in China, solving the bottleneck problem of insufficient supply and demand of oil products, improving the utilization rate of the existing resources and protecting the ecological environment. The waste mineral oil produces many substances which have a serious harmful effect on human bodies.
At present, the existing method for recycling waste mineral oil has complex operation process and high treatment cost, and the treated mineral oil has low purity and regeneration efficiency, is difficult to be secondarily utilized or sold, causes poor economic benefit and is not beneficial to industrialized integrated production. Accordingly, one skilled in the art provides a subject to solve the problems set forth in the background above.
Disclosure of Invention
The invention aims to provide a waste mineral oil decoloring and refining process and an operation method thereof, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a process for decoloring and refining waste mineral oil and an operation method thereof comprise the following steps:
1) Pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) Then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) Carrying out oil-water separation on the waste mineral oil;
4) carrying out hydrodechlorination on the waste mineral oil;
5) decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) And the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
As a further scheme of the invention: in the step 1), the waste mineral oil is heated to 40-60 ℃, then cooling and sedimentation are carried out, a tank used for sedimentation is a cylindrical tank body with large diameter and high height so as to increase the treatment capacity and the treatment efficiency, a replaceable permanent magnet or an electromagnet is arranged in the tank body, settled impurities are removed, the waste oil is heated to 40-60 ℃ again, a flocculating agent is added so as to flocculate and aggregate the impurities and facilitate subsequent filtration, then the liquid containing solid suspended impurities is filtered through a porous filtering material, the porous filtering material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, meanwhile, propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used for dissolving and extracting aromatic hydrocarbon and polar substances.
As a still further scheme of the invention: in the step 2), the addition ratio of the demulsifier, the alkali liquor and the water is 0.01: 0.1: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
As a still further scheme of the invention: and in the step 3), the waste mineral oil raw material is sequentially sent to a distillation tower for distillation after passing through a pump and a filter, the waste mineral oil raw material in the distillation tower is heated to 60-90 ℃, the waste mineral oil raw material in the distillation tower enters a product buffer tank after condensation and gas-liquid separation, water vapor is discharged through a vacuum pump, the waste mineral oil is condensed and then recovered to a liquid storage tank, the waste mineral oil is recycled, and the waste mineral oil in the buffer tank is further subjected to solid impurity and water removal through disc centrifuge centrifugation and horizontal centrifuge, so that the quality of the final product is ensured.
As a still further scheme of the invention: in the step 4), the waste mineral oil raw material enters a hydrodechlorination main reactor for hydrofining, hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrogenation and dechlorination reaction system is in a hydrogen state and is at a pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be carried out in a composite molecular homogeneous catalyst environment, wherein a hydrodechlorination catalyst is arranged in the hydrodechlorination main reactor, and the hydrodechlorination catalyst is specifically composed of an alumina carrier loaded with an active component W, Ni and an auxiliary component P.
As a still further scheme of the invention: in the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the tower top and 280-400 ℃ at the tower bottom, a tower bottom heat source is supplied by heating tower bottom materials by a heating furnace economizer in a forced circulation heating manner, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, residual oil flows out from the bottom of the evaporator and is recycled or buried, a decoloring agent is used for decoloring the base oil, the appearance quality of the base oil is improved, the competitiveness is improved, and the decoloring agent is at least one of activated clay or silica gel.
As a still further scheme of the invention: in the step 6), the oil material barrel is made of one of plastic or stainless steel, and the oil material barrel is selected from one of 100L, 500L or 1000L in volume.
Compared with the prior art, the invention has the beneficial effects that:
The method has the advantages of advanced process, simple operation steps, manpower and material resources saving, high purity of the waste mineral oil treated by the treatment method, thorough reaction and no other impurities, can improve the quality and purity of the produced mineral oil base oil, improve the yield, has good treatment effect, reduces the acidity of the product because the treated waste mineral oil does not contain impurities such as powdery metal chips and the like, adopts a special catalyst in the hydrofining step, has good catalytic effect, thorough reaction and high product purity, meanwhile, the treated mineral oil does not contain catalyst and water vapor, has uniform components, high product quality, convenient and quick storage and transportation of finished products, convenient statistics and sale, and the method is favorable for large-scale treatment and continuous operation of equipment, can obtain better environmental benefit and economic benefit, and relieve the pollution of the waste oil to the environment and the shortage of petroleum products.
Detailed Description
the technical solution of the present invention will be described in further detail with reference to specific embodiments.
Example 1:
a process for decoloring and refining waste mineral oil and an operation method thereof comprise the following steps:
1) Pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) Then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) Carrying out oil-water separation on the waste mineral oil;
4) Carrying out hydrodechlorination on the waste mineral oil;
5) Decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) And the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
In the step 1), the waste mineral oil is heated to 40-60 ℃, then cooling and sedimentation are carried out, a tank used for sedimentation is a cylindrical tank body with large diameter and high height so as to increase the treatment capacity and the treatment efficiency, a replaceable permanent magnet or an electromagnet is arranged in the tank body, settled impurities are removed, the waste oil is heated to 40-60 ℃ again, a flocculating agent is added so as to flocculate and aggregate the impurities and facilitate subsequent filtration, then the liquid containing solid suspended impurities is filtered through a porous filtering material, the porous filtering material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, meanwhile, propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used for dissolving and extracting aromatic hydrocarbon and polar substances.
In the step 2), the addition ratio of the demulsifier, the alkali liquor and the water is 0.01: 0.1: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
And in the step 3), the waste mineral oil raw material is sequentially sent to a distillation tower for distillation after passing through a pump and a filter, the waste mineral oil raw material in the distillation tower is heated to 60-90 ℃, the waste mineral oil raw material in the distillation tower enters a product buffer tank after condensation and gas-liquid separation, water vapor is discharged through a vacuum pump, the waste mineral oil is condensed and then recovered to a liquid storage tank, the waste mineral oil is recycled, and the waste mineral oil in the buffer tank is further subjected to solid impurity and water removal through disc centrifuge centrifugation and horizontal centrifuge, so that the quality of the final product is ensured.
in the step 4), the waste mineral oil raw material enters a hydrodechlorination main reactor for hydrofining, hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrogenation and dechlorination reaction system is in a hydrogen state and is at a pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be carried out in a composite molecular homogeneous catalyst environment, wherein a hydrodechlorination catalyst is arranged in the hydrodechlorination main reactor, and the hydrodechlorination catalyst is specifically composed of an alumina carrier loaded with an active component W, Ni and an auxiliary component P.
In the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the tower top and 280-400 ℃ at the tower bottom, a tower bottom heat source is supplied by heating tower bottom materials by a heating furnace economizer in a forced circulation heating manner, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, residual oil flows out from the bottom of the evaporator and is recycled or buried, a decoloring agent is used for decoloring the base oil, the appearance quality of the base oil is improved, the competitiveness is improved, and the decoloring agent is at least one of activated clay or silica gel.
in the step 6), the oil material barrel is made of one of plastic or stainless steel, and the oil material barrel is selected from one of 100L, 500L or 1000L in volume.
example 2:
a process for decoloring and refining waste mineral oil and an operation method thereof comprise the following steps:
1) pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) carrying out oil-water separation on the waste mineral oil;
4) Carrying out hydrodechlorination on the waste mineral oil;
5) Decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) And the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
In the step 1), the waste mineral oil is heated to 60 ℃, and then cooled and settled, wherein a tank used for settlement is a cylindrical tank with large diameter and high height so as to increase the treatment capacity and the treatment efficiency, a replaceable permanent magnet or an electromagnet is arranged in the tank, settled impurities are removed, the waste oil is heated to 60 ℃ again, a flocculating agent is added to flocculate and aggregate the impurities so as to facilitate subsequent filtration, then the liquid containing solid suspended impurities is filtered through a porous filter material, the porous filter material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, simultaneously propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used to dissolve aromatic hydrocarbon and polar substances.
In the step 2), the addition ratio of the demulsifier, the alkali liquor and the water is 0.01: 0.1: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
and in the step 3), the waste mineral oil raw material is sequentially sent to a distillation tower for distillation after passing through a pump and a filter, the waste mineral oil raw material in the distillation tower is heated to 90 ℃, the waste mineral oil raw material in the distillation tower is condensed and subjected to gas-liquid separation and then enters a product buffer tank, water vapor is discharged through a vacuum pump, the condensed waste mineral oil raw material is recovered to a liquid storage tank and is recycled, and the waste mineral oil in the buffer tank is further subjected to solid impurity and water removal through disc centrifuge centrifugation and horizontal centrifuge, so that the quality of the final product is ensured.
in the step 4), the waste mineral oil raw material enters a hydrodechlorination main reactor for hydrofining, hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrogenation and dechlorination reaction system is in a hydrogen state and is at a pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be carried out in a composite molecular homogeneous catalyst environment, wherein a hydrodechlorination catalyst is arranged in the hydrodechlorination main reactor, and the hydrodechlorination catalyst is specifically composed of an alumina carrier loaded with an active component W, Ni and an auxiliary component P.
in the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the tower top and 280-400 ℃ at the tower bottom, a tower bottom heat source is supplied by heating tower bottom materials by a heating furnace economizer in a forced circulation heating manner, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, residual oil flows out from the bottom of the evaporator and is recycled or buried, a decoloring agent is used for decoloring the base oil, the appearance quality of the base oil is improved, the competitiveness is improved, and the decoloring agent is at least one of activated clay or silica gel.
in the step 6), the oil material barrel is made of one of plastic or stainless steel, and the oil material barrel is selected from one of 100L, 500L or 1000L in volume.
example 3: a process for decoloring and refining waste mineral oil and an operation method thereof comprise the following steps:
1) Pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) carrying out oil-water separation on the waste mineral oil;
4) Carrying out hydrodechlorination on the waste mineral oil;
5) decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) and the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
In the step 1), the waste mineral oil is heated to 40-60 ℃, then cooling and sedimentation are carried out, a tank used for sedimentation is a cylindrical tank body with large diameter and high height so as to increase the treatment capacity and the treatment efficiency, a replaceable permanent magnet or an electromagnet is arranged in the tank body, settled impurities are removed, the waste oil is heated to 40-60 ℃ again, a flocculating agent is added so as to flocculate and aggregate the impurities and facilitate subsequent filtration, then the liquid containing solid suspended impurities is filtered through a porous filtering material, the porous filtering material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, meanwhile, propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used for dissolving and extracting aromatic hydrocarbon and polar substances.
in the step 2), the addition ratio of the demulsifier, the alkali liquor and the water is 0.02: 0.2: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
and in the step 3), the waste mineral oil raw material is sequentially sent to a distillation tower for distillation after passing through a pump and a filter, the waste mineral oil raw material in the distillation tower is heated to 60-90 ℃, the waste mineral oil raw material in the distillation tower enters a product buffer tank after condensation and gas-liquid separation, water vapor is discharged through a vacuum pump, the waste mineral oil is condensed and then recovered to a liquid storage tank, the waste mineral oil is recycled, and the waste mineral oil in the buffer tank is further subjected to solid impurity and water removal through disc centrifuge centrifugation and horizontal centrifuge, so that the quality of the final product is ensured.
In the step 4), the waste mineral oil raw material enters a hydrodechlorination main reactor for hydrofining, hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrogenation and dechlorination reaction system is in a hydrogen state and is at a pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be carried out in a composite molecular homogeneous catalyst environment, wherein a hydrodechlorination catalyst is arranged in the hydrodechlorination main reactor, and the hydrodechlorination catalyst is specifically composed of an alumina carrier loaded with an active component W, Ni and an auxiliary component P.
In the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the tower top and 280-400 ℃ at the tower bottom, a tower bottom heat source is supplied by heating tower bottom materials by a heating furnace economizer in a forced circulation heating manner, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, residual oil flows out from the bottom of the evaporator and is recycled or buried, a decoloring agent is used for decoloring the base oil, the appearance quality of the base oil is improved, the competitiveness is improved, and the decoloring agent is at least one of activated clay or silica gel.
in the step 6), the oil material barrel is made of one of plastic or stainless steel, and the oil material barrel is selected from one of 100L, 500L or 1000L in volume.
Example 4: a process for decoloring and refining waste mineral oil and an operation method thereof comprise the following steps:
1) Pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) Then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) Carrying out oil-water separation on the waste mineral oil;
4) Carrying out hydrodechlorination on the waste mineral oil;
5) Decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) And the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
in the step 1), the waste mineral oil is heated to 40-60 ℃, then cooling and sedimentation are carried out, a tank used for sedimentation is a cylindrical tank body with large diameter and high height so as to increase the treatment capacity and the treatment efficiency, a replaceable permanent magnet or an electromagnet is arranged in the tank body, settled impurities are removed, the waste oil is heated to 40-60 ℃ again, a flocculating agent is added so as to flocculate and aggregate the impurities and facilitate subsequent filtration, then the liquid containing solid suspended impurities is filtered through a porous filtering material, the porous filtering material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, meanwhile, propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used for dissolving and extracting aromatic hydrocarbon and polar substances.
in the step 2), the addition ratio of the demulsifier, the alkali liquor and the water is 0.01: 0.1: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
and in the step 3), the waste mineral oil raw material is sequentially sent to a distillation tower for distillation after passing through a pump and a filter, the waste mineral oil raw material in the distillation tower is heated to 60-90 ℃, the waste mineral oil raw material in the distillation tower enters a product buffer tank after condensation and gas-liquid separation, water vapor is discharged through a vacuum pump, the waste mineral oil is condensed and then recovered to a liquid storage tank, the waste mineral oil is recycled, and the waste mineral oil in the buffer tank is further subjected to solid impurity and water removal through disc centrifuge centrifugation and horizontal centrifuge, so that the quality of the final product is ensured.
In the step 4), the waste mineral oil raw material enters a hydrodechlorination main reactor for hydrofining, hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrogenation and dechlorination reaction system is in a hydrogen state and is at a pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be carried out in a composite molecular homogeneous catalyst environment, wherein a hydrodechlorination catalyst is arranged in the hydrodechlorination main reactor, and the hydrodechlorination catalyst is specifically composed of an alumina carrier loaded with an active component W, Ni and an auxiliary component P.
in the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the tower top and 280-400 ℃ at the tower bottom, a tower bottom heat source is supplied by heating tower bottom materials by a heating furnace economizer in a forced circulation heating manner, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, residual oil flows out from the bottom of the evaporator and is recycled or buried, a decoloring agent is used for decoloring the base oil, the appearance quality of the base oil is improved, the competitiveness is improved, and the decoloring agent is at least one of activated clay or silica gel.
In the step 6), the oil material barrel is made of one of plastic or stainless steel, and the capacity of the oil material barrel is 1000L.
Wherein, the embodiment 1 is the most preferable refining process and the operation method thereof, the oil-water separation speed is higher and the efficiency is higher in the embodiment 2, the organic acid in the waste mineral oil is more thoroughly separated in the embodiment 3, the storage and the transportation of the refined oil are more convenient in the embodiment 4, and the additional split charging is needed in the retail sale.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (7)
1. a process for decoloring and refining waste mineral oil and an operation method thereof are characterized by comprising the following steps:
1) Pumping the waste mineral oil to a pretreatment tank for pretreatment of filtration, sedimentation and dehydration;
2) Then the mixture enters a water washing tank, and alkali liquor, water and a demulsifier are added into the water washing tank to remove organic acid and water-soluble additives in the oil;
3) carrying out oil-water separation on the waste mineral oil;
4) carrying out hydrodechlorination on the waste mineral oil;
5) decompressing the waste mineral oil raw material, and then feeding the decompressed waste mineral oil raw material into a decompression distillation tower to separate different fractions of mineral oil base oil;
6) And the finished refined oil is classified to be packaged in an oil barrel, and a label is stuck, so that the refined oil is convenient to store and sell.
2. The process according to claim 1 for refining and decoloring waste mineral oil, the method is characterized in that in the step 1), the waste mineral oil is cooled and settled after being heated to 40-60 ℃; the tank used for sedimentation is a cylindrical tank body with large diameter and high height, in order to increase the treatment capacity and the treatment efficiency, the tank body is internally provided with a replaceable permanent magnet or an electromagnet, settled impurities are removed, the waste oil is heated to 40-60 ℃ again, a flocculating agent is added to flocculate and aggregate the impurities, the subsequent filtration is convenient, then filtering the liquid containing solid suspended impurities by a porous filtering material, wherein the porous filtering material can be one of a metal wire mesh, a high polymer material mesh or a cloth woven mesh, meanwhile, propane hydrocarbon is added to precipitate impurity molecules with high relative molecular mass in the waste oil, and furfural is used for dissolving and extracting aromatic hydrocarbon and polar substances.
3. The process of claim 1, wherein in the step 2), the demulsifier, the lye and the water are added in a ratio of 0.01: 0.1: 1, the alkali liquor can be one of sodium hydroxide solution, ammonia water or potassium hydroxide solution.
4. the process of claim 1, wherein in step 3), the waste mineral oil raw material is sequentially pumped through a pump and a filter and then sent to a distillation tower for distillation, the waste mineral oil raw material in the distillation tower is heated to 60-90 ℃, the waste mineral oil raw material in the distillation tower is condensed and subjected to gas-liquid separation and then enters a product buffer tank, water vapor is discharged through a vacuum pump, the waste mineral oil is condensed and then recovered in a liquid storage tank for recycling, and the waste mineral oil in the buffer tank is further subjected to solid impurity removal and water removal through a disc centrifuge and a horizontal centrifuge to ensure the quality of the final product.
5. The process of claim 1, wherein in the step 4), the waste mineral oil raw material is fed into a hydrodechlorination main reactor for hydrofining, the hydrofining is realized under the action of a hydrogenation catalyst, the hydrodechlorination temperature condition is 200-450 ℃, the hydrodechlorination reaction system has a hydrogen pressure of 0.9-8.5MPa, and the hydrogenation reaction needs to be performed in a composite molecular homogeneous catalyst environment, wherein the hydrodechlorination main reactor is internally provided with a hydrodechlorination catalyst, and the hydrodechlorination catalyst is specifically composed of an alumina carrier supported active component W, Ni and an auxiliary component P.
6. the process of claim 1, wherein in the step 5), the operating temperature of the vacuum distillation tower 11 is 80-130 ℃ at the top of the tower, 280 ℃ at the bottom of the tower and 400 ℃, the heat source at the bottom of the tower is supplied by forced circulation heating of materials at the bottom of the heating furnace economizer heating tower, the vacuum degree is 4-25 pa, the vacuum distillation tower is a packed tower, the base oil with different fractions is cut and separated, the residual oil flows out from the bottom of the evaporator for recycling or landfill, the base oil is decolorized by a decolorizing agent, the appearance quality of the base oil is improved, and the competitiveness is improved, and the decolorizing agent is at least one of activated clay or silica gel.
7. The process of claim 1, wherein in step 6), the oil drum is made of one of plastic and stainless steel, and the oil drum has a capacity of 100L, 500L or 1000L.
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| CN112592733A (en) * | 2020-11-24 | 2021-04-02 | 黄忠斌 | Method for recycling waste mineral oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106350112A (en) * | 2015-07-14 | 2017-01-25 | 新疆聚力环保科技有限公司 | Method for pretreating waste mineral oil and performing hydrogenation regeneration to produce lubricating base oil |
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| CN106350112A (en) * | 2015-07-14 | 2017-01-25 | 新疆聚力环保科技有限公司 | Method for pretreating waste mineral oil and performing hydrogenation regeneration to produce lubricating base oil |
| CN106916604A (en) * | 2017-04-07 | 2017-07-04 | 重庆君利丰环保有限公司 | Using the method for blast furnace blowing mode harmlessness disposing waste mineral oil |
| CN109957420A (en) * | 2017-12-14 | 2019-07-02 | 佛山市富龙环保科技有限公司 | A kind of preprocess method of waste mineral oil |
| CN109054894A (en) * | 2018-08-15 | 2018-12-21 | 黑龙江莱睿普思环境科技发展有限公司 | A kind of method of vacuum distillation-hydrotreating waste mineral oil |
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| CN112592733A (en) * | 2020-11-24 | 2021-04-02 | 黄忠斌 | Method for recycling waste mineral oil |
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