CN110776224A - Treatment method of oil field oil-containing sludge - Google Patents
Treatment method of oil field oil-containing sludge Download PDFInfo
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- CN110776224A CN110776224A CN201911137440.0A CN201911137440A CN110776224A CN 110776224 A CN110776224 A CN 110776224A CN 201911137440 A CN201911137440 A CN 201911137440A CN 110776224 A CN110776224 A CN 110776224A
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a treatment method of oily sludge in an oil field, belonging to the field of harmless treatment of oily sludge. The method comprises the following steps: firstly, oil-containing sludge is treated by adopting a grinding and cleaning method, and then the oil sludge after grinding and cleaning is repaired by adopting a repairing agent. The invention adopts a combined treatment method of firstly grinding, cleaning and then repairing, solves the problems of poor treatment effect and large medicament dosage of a single method, and can quickly and efficiently realize the harmless treatment of the oily sludge by the mutual cooperation of the two methods.
Description
Technical Field
The invention relates to a treatment method of oily sludge in an oil field, belonging to the field of harmless treatment of oily sludge.
Background
Oily sludge is brought into a hazardous waste control list (HW08 items) by China, the amount of petroleum sludge in China is huge at present, about 3000 million tons of oily sludge can be generated every year, the stockpiled sludge reaches hundreds of millions of tons, and if the oily sludge is directly discharged without treatment, large-area land is occupied, and the environmental pollution to surrounding soil, water and atmospheric environment is serious. The sludge contains a large amount of bacteria, viruses, parasites and eggs thereof, heavy metals comprise arsenic, copper, zinc, chromium, mercury and the like, and the sludge also contains a large amount of toxic and harmful substances such as benzene series, polycyclic aromatic hydrocarbon, polychlorinated biphenyl, dioxin and the like. PAHs (polycyclic aromatic hydrocarbons) in petroleum are confirmed to be carcinogens, affect the normal functions of liver, kidney, cardiovascular system and the like, and have great harm to human bodies after long-term contact.
In view of the various hazards caused by oily sludge, the utilization of oily sludge in harmless disposal is not slow enough. At present, the methods for treating oily sludge at home and abroad are mainly divided into a physical chemical method and a biological method. The physical and chemical method is a process for degrading petroleum pollutants in oil sludge through physical or chemical action or combined action of the two to treat or purify the oil sludge, and mainly comprises the following steps: water washing, solidification, solvent extraction, incineration, supercritical, isolation, washing leaching, chemical oxidation, photodegradation, solvent-sonication, etc. The biological treatment method utilizes characteristic microorganisms screened in nature or artificially by some means, and utilizes the activity of the microorganisms for metabolizing organic matters to ensure that petroleum hydrocarbon in the oil sludge is dispersed and stripped or degraded into small molecular substances, thereby realizing the purpose of treating the oil-containing sludge.
In recent years, along with the increase of the environmental protection of oil fields, the treatment of oily sludge is paid sufficient attention, and a plurality of new methods are developed as required, but all the methods have various advantages and certain limitations, and the method totally meets the national and local environmental protection requirements and is difficult to realize by being applied to one process alone.
Disclosure of Invention
The invention mainly aims at the oil sludge with high oil content, the oil content in the oil sludge is recycled, and the residual sludge is subjected to harmless treatment so as to meet the soil environment quality standard, thereby solving the problems.
The invention provides a method for treating oily sludge in an oil field, which comprises the following steps: firstly, oil-containing sludge is treated by adopting a grinding and cleaning method, and then the oil sludge after grinding and cleaning is repaired by adopting a repairing agent.
The preferred grinding and cleaning steps of the present invention are as follows: putting the oily sludge, the medicament and water into a grinding cleaning machine for cleaning; screening the cleaned oily sludge by using a screen, and respectively collecting a solid and muddy water mixture; centrifugally dewatering the mud-water mixture, and respectively collecting oil-containing sewage and oil sludge; separating oil from water in oily sewage, and collecting oil.
The invention preferably adopts magnesium minerals as the medicament, and the addition amount of the medicament is 0.5-3% of the mass of the oily sludge.
The agent of the present invention is further preferably at least one of brucite, magnesite and dolomite.
The invention preferably has the mass ratio of the oil-containing sludge to water of 1: 1-4.
The cleaning time is preferably 5-20 min.
The invention preferably has the aperture of the screen mesh of 1-20 mm.
The preferred repairing agent treatment steps of the invention are as follows: and adding water into the oil sludge and the repairing agent, stirring, airing and air-drying.
The stirring time is preferably 30-60 min.
According to the invention, the repairing agent is preferably a magnesium mineral, and the adding amount of the repairing agent is 5-30% of the mass of the oil sludge.
The repair agent of the present invention is further preferably at least one of brucite, magnesite and dolomite.
The invention preferably adopts the airing and air-drying method as follows: stirring for 2-5 times per day, and treating for 2-4 days.
The invention has the beneficial effects that:
the method adopts a combined treatment method of firstly grinding, cleaning and then repairing, solves the problems of poor treatment effect and large medicament consumption of a single method, can quickly and efficiently realize the harmless treatment of the oily sludge by the mutual cooperation of the two methods, and has the advantages of simple and efficient construction, good treatment effect, low cost and important application prospect.
Drawings
In the figure 1 of the attached drawings of the invention,
FIG. 1 is a process flow diagram of the treatment process described in examples 1-3.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1
A method for treating oil field oily sludge, which comprises the following steps:
grinding and cleaning:
500g of oily sludge in a certain domestic oil field with the oil content of 3.1 percent, 2.5g of magnesite and 1000g of water are put into a grinding cleaning machine to be cleaned for 5 min;
screening the cleaned oily sludge by using a 1mm screen, washing the screened oily sludge by using water, and respectively collecting solids with the size of more than 1mm and muddy water with the size of less than 1 mm;
centrifugally dewatering a mud-water mixture with the thickness of less than 1mm, and respectively collecting oil-containing sewage and oil sludge;
separating oil from water in oily sewage, collecting oil, and recycling the waste water;
a repairing agent treatment step:
and (3) mechanically stirring 250g of oil sludge and 25g of brucite with 75mL of water for 45min, airing and air-drying, stirring for 2 times every day, and treating for 3 days to obtain the oil sludge with the oil content reduced to 0.5%.
Example 2
A method for treating oil field oily sludge, which comprises the following steps:
grinding and cleaning:
500g of oily sludge in a certain domestic oil field with the oil content of 5.7 percent, 3g of magnesite, 2g of dolomite and 1000g of water are put into a grinding cleaning machine to be cleaned for 10 min;
screening the cleaned oily sludge by using a 1mm screen, washing the screened oily sludge by using water, and respectively collecting solids with the size of more than 1mm and muddy water with the size of less than 1 mm;
centrifugally dewatering a mud-water mixture with the thickness of less than 1mm, and respectively collecting oil-containing sewage and oil sludge;
separating oil from water in oily sewage, collecting oil, and recycling the waste water;
a repairing agent treatment step:
and (3) mechanically stirring 250g of oil sludge and 50g of brucite with 75mL of water for 45min, airing and air-drying, stirring for 3 times every day, and treating for 3 days to obtain the oil sludge with the oil content reduced to 0.6%.
Example 3
A method for treating oil field oily sludge, which comprises the following steps:
grinding and cleaning:
500g of oily sludge in a certain domestic oil field with the oil content of 7.2 percent, 5g of brucite, 5g of magnesite, 5g of dolomite and 2000g of water are put into a grinding cleaning machine to be cleaned for 10 min;
screening the cleaned oily sludge by using a 1mm screen, washing the screened oily sludge by using water, and respectively collecting solids with the size of more than 1mm and muddy water with the size of less than 1 mm;
centrifugally dewatering a mud-water mixture with the thickness of less than 1mm, and respectively collecting oil-containing sewage and oil sludge;
separating oil from water in oily sewage, collecting oil, and recycling the waste water;
a repairing agent treatment step:
and adding 75mL of water into 250g of oil sludge, 25g of magnesite and 37g of dolomite, mechanically stirring for 45min, airing, air-drying and disposing, stirring for 5 times every day, and disposing for 4 days to obtain the oil sludge with the oil content reduced to 0.9%.
Claims (10)
1. A treatment method of oil field oily sludge is characterized in that: the method comprises the following steps: firstly, oil-containing sludge is treated by adopting a grinding and cleaning method, and then the oil sludge after grinding and cleaning is repaired by adopting a repairing agent.
2. The method for treating the oil field oily sludge according to claim 1, which is characterized in that: the grinding and cleaning steps are as follows:
putting the oily sludge, the medicament and water into a grinding cleaning machine for cleaning;
screening the cleaned oily sludge by using a screen, and respectively collecting a solid and muddy water mixture;
centrifugally dewatering the mud-water mixture, and respectively collecting oil-containing sewage and oil sludge;
separating oil from water in oily sewage, and collecting oil.
3. The method for treating the oil field oily sludge according to claim 2, which is characterized in that: the medicament is magnesium mineral, and the addition amount of the medicament is 0.5-3% of the mass of the oily sludge.
4. The method for treating the oil field oily sludge according to claim 3, characterized by comprising the following steps: the mass ratio of the oily sludge to the water is 1: 1-4.
5. The method for treating the oil field oily sludge according to claim 4, characterized by comprising the following steps: the cleaning time is 5-20 min.
6. The method for treating the oil field oily sludge according to claim 5, which is characterized in that: the aperture of the screen is 1-20 mm.
7. The method for treating the oil field oily sludge according to claim 6, which is characterized in that: the repairing agent treatment steps are as follows:
and adding water into the oil sludge and the repairing agent, stirring, airing and air-drying.
8. The method for treating the oil field oily sludge according to claim 7, which is characterized in that: the stirring time is 30-60 min.
9. The method for treating the oil field oily sludge according to claim 8, characterized by comprising the following steps: the repairing agent is magnesium mineral, and the adding amount of the repairing agent is 5-30% of the mass of the oil sludge.
10. The method for treating oil field oily sludge according to claim 9, characterized in that: the airing and air-drying method comprises the following steps: stirring for 2-5 times per day, and treating for 2-4 days.
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| CN201911137440.0A CN110776224A (en) | 2019-11-19 | 2019-11-19 | Treatment method of oil field oil-containing sludge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880380A (en) * | 2021-11-15 | 2022-01-04 | 大连海事大学 | Oily sludge treatment method and device |
| CN113893764A (en) * | 2021-11-15 | 2022-01-07 | 大连海事大学 | Oil sludge homogenization reaction device and homogenization method |
| CN115007623A (en) * | 2022-05-13 | 2022-09-06 | 大连理工大学盘锦产业技术研究院 | Method and system for treating oil-containing sludge and petroleum-polluted soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880380A (en) * | 2021-11-15 | 2022-01-04 | 大连海事大学 | Oily sludge treatment method and device |
| CN113893764A (en) * | 2021-11-15 | 2022-01-07 | 大连海事大学 | Oil sludge homogenization reaction device and homogenization method |
| CN113893764B (en) * | 2021-11-15 | 2023-09-08 | 大连海事大学 | Sludge homogenizing reaction device and homogenizing method |
| CN115007623A (en) * | 2022-05-13 | 2022-09-06 | 大连理工大学盘锦产业技术研究院 | Method and system for treating oil-containing sludge and petroleum-polluted soil |
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