CN113501641A - Three-phase separation process for oil sludge of water-washing drilling well - Google Patents
Three-phase separation process for oil sludge of water-washing drilling well Download PDFInfo
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- CN113501641A CN113501641A CN202110965335.7A CN202110965335A CN113501641A CN 113501641 A CN113501641 A CN 113501641A CN 202110965335 A CN202110965335 A CN 202110965335A CN 113501641 A CN113501641 A CN 113501641A
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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
- 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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- 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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
A three-phase separation system for oil sludge of water-washing drilling comprises the following steps: s1, classification treatment of drilling oil sludge: the semi-flowing oil sludge and the flowing oil sludge in the well drilling oil sludge are stored in a semi-flowing oil sludge pool and a flowing oil sludge tank in a distinguishing way; s2, supplying water by solar energy; s3, washing the drilling oil sludge: adding the drilling oil sludge conveyed from the semi-flow oil sludge pool and the flow oil sludge tank into the oil sludge washing tank, and then adding hot water conveyed from a hot water storage tank; s4, oil-water separation: oil and water in the oil sludge washing tank overflows to an oil-water separation tank for oil-water separation, the separated crude oil enters a crude oil storage tank, and the separated water is recycled to a return water storage tank; s5, plate and frame filter pressing: and conveying the muddy water in the oil sludge washing tank to a plate-and-frame filter press through a muddy water pump for filter pressing. The heat of the solar water heater is used for adding a medicament to carry out three-phase classification in the washing tank, and then oil-water separation and mud-water classification are carried out. The water can be recycled, the oil can be refined, and the mud can reach the standard and can be utilized harmlessly.
Description
Technical Field
The invention relates to the technical field of well drilling oil sludge recycling, in particular to a three-phase separation process for water washing well drilling oil sludge.
Background
The oil sludge produced during drilling in oil and gas fields is basically fluid contaminated oil of three mixtures of oil, water and soil. At present, the treatment of the drilling oil sludge is reported in China.
Disclosure of Invention
The invention aims to provide a three-phase separation process of water washing drilling oil sludge aiming at the defects.
A production line of a water-washing drilling oil sludge three-phase separation process comprises a solar water heater, a semi-flow oil sludge pool, a flow oil sludge tank, an oil sludge washing tank, an oil-water separator, a crude oil storage tank, a plate-and-frame filter press, a backwater storage tank and a hot water storage tank;
the water inlet end and the water outlet end of the solar water heater are respectively connected with the return water storage tank and the hot water storage tank through pipelines, and the hot water storage tank is connected to the oil sludge washing tank through a pipeline;
the bottom of the semi-flowing oil sludge pool is connected with a first oil sludge conveying pipe, the bottom of the flowing oil sludge tank is connected with a second oil sludge conveying pipe, and the end parts of the first oil sludge conveying pipe and the second oil sludge conveying pipe are connected with a feeding pipe of the oil sludge tank;
an oil-water discharge hole in the upper part of the oil sludge washing tank is connected to the oil-water separator through an oil-water discharge pipe, an oil outlet of the oil-water separator is connected to the crude oil storage tank through an oil discharge pipe, a water outlet of the oil-water separator is connected to a water return pipe through a drainage pipe and a water suction pump, and the end part of the water return pipe is connected to the water return storage tank;
and a sludge water discharge hole at the bottom of the sludge washing tank is connected to the plate-and-frame filter press through a sludge water discharge pipe and a sludge water pump, and a water discharge hole of the plate-and-frame filter press is connected with the water return pipeline.
And the first oil sludge conveying pipe and the second oil sludge conveying pipe are both provided with an oil sludge discharge valve and an oil sludge pump.
And a water return pump is arranged on the water return pipeline.
And an oil drain valve is arranged on the oil-water discharging pipe.
The temperature of the hot water in the hot water storage tank is controlled to be 90-95 ℃.
The oil sludge washing tank comprises a washing tank body and a stirring assembly,
the top of the washing tank body is provided with a water inlet, an oil sludge inlet and a waste gas outlet, the upper part of the outer wall of the washing tank body is provided with an oil-water discharge port, the bottom of the washing tank body is provided with a muddy water discharge pipeline, the muddy water discharge pipeline is provided with a high-temperature steam branch pipeline,
the stirring component comprises a stirring shaft, a group of stirring blades, a stirring blade fixing ring and a stirring shaft driving motor,
the stirring shaft is movably and hermetically arranged at the bottom of the washing tank body, a group of stirring rods is arranged at the top of each stirring blade, a group of stirring blades are uniformly distributed on the stirring shaft in an annular mode, the stirring blade fixing rings are fixedly arranged at the ends of the group of stirring blades, and a power output shaft of a driving motor of the stirring shaft is connected with the stirring shaft through a speed reducer in a transmission mode.
The stirring shaft is arranged at the bottom of the water washing tank body through a mechanical sealing device.
The stirring shaft driving motor is arranged on the ground below the washing tank body through a motor bracket.
An observation port is arranged on the water washing tank body.
A three-phase separation process of water-washed drilling oil sludge comprises the following steps:
s1, classification treatment of drilling oil sludge: the semi-flowing oil sludge and the flowing oil sludge in the well drilling oil sludge are stored in a semi-flowing oil sludge pool and a flowing oil sludge tank in a distinguishing way;
s2, solar water supply: hot water is produced by a solar water heater and then is stored in a hot water storage tank, and a water inlet pipe of the solar water heater is connected with a return water storage tank;
s3, washing the drilling oil sludge: adding the drilling oil sludge conveyed by a semi-flow oil sludge pool and a flow oil sludge tank into an oil sludge washing tank, then adding hot water conveyed by a hot water storage tank, controlling the temperature of the hot water to be 90-95 ℃, and adding a cleaning agent into the oil sludge washing tank to carry out water washing treatment on the drilling oil sludge;
s4, oil-water separation: oil and water in the oil sludge washing tank overflows to an oil-water separation tank for oil-water separation, the separated crude oil enters a crude oil storage tank, and the separated water is recycled to a return water storage tank;
s5, plate and frame filter pressing: and conveying the mud water in the oil sludge washing tank to a plate-and-frame filter press through a mud-water pump for filter pressing to obtain dried mud and filtrate water, and recovering the filtrate water to a return water storage tank.
The invention has the advantages that: the oil sludge produced during drilling in oil and gas fields is basically oil, water, soil and three kinds of mixture polluted oil. The process is a domestic decrement harmless process. The heat of the solar water heater is used for adding a medicament to carry out three-phase classification in the washing tank, and then oil-water separation and mud-water classification are carried out. The water can be recycled, the oil can be refined, and the mud can reach the standard and can be utilized harmlessly. The oil content of the dried mud is 0.5 to 3 percent, reaches the national harmless standard, and can be used for making bricks.
Description of the drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the sludge washing tank.
Fig. 3 is a schematic sectional structure view of the sludge washing tank.
Fig. 4 is a schematic structural diagram of an agitation assembly of the sludge washing tank.
Detailed Description
As shown in the attached drawing, the production line of the water-washing drilling oil sludge three-phase separation process comprises a solar water heater 1, a semi-flowing oil sludge pool 2, a flowing oil sludge tank 3, an oil sludge washing tank 4, an oil-water separator 5, a crude oil storage tank 6, a plate-and-frame filter press 7, a backwater storage tank 8 and a hot water storage tank 9;
the water inlet end and the water outlet end of the solar water heater 1 are respectively connected with the return water storage tank 8 and the hot water storage tank 9 through pipelines, and the hot water storage tank 9 is connected to the oil sludge washing tank 4 through a pipeline;
the bottom of the semi-flowing oil sludge pool 2 is connected with a first oil sludge conveying pipe 10, the bottom of the flowing oil sludge tank 3 is connected with a second oil sludge conveying pipe 11, and the end parts of the first oil sludge conveying pipe 10 and the second oil sludge conveying pipe 11 are connected with a feeding pipe of the oil sludge washing tank 4;
an oil-water discharge hole at the upper part of the oil sludge washing tank 4 is connected to the oil-water separator 5 through an oil-water discharge pipe 12, an oil outlet of the oil-water separator 5 is connected to the crude oil storage tank 6 through an oil discharge pipeline, a water outlet of the oil-water separator 5 is connected to a water return pipeline 13 through a drainage pipeline and a water suction pump 14, and the end part of the water return pipeline 13 is connected to the water return storage tank 8;
the bottom mud water discharge hole of the oil sludge washing tank 4 is connected to the plate-and-frame filter press 7 through a mud water discharge pipe 15 and a mud water pump 16, and the water discharge hole of the plate-and-frame filter press 7 is connected with the water return pipeline 13.
The first sludge transfer pipe 10 and the second sludge transfer pipe 11 are both provided with a sludge discharge valve 21 and a sludge pump 22.
A water return pump 18 is arranged on the water return pipeline 13.
An oil drain valve 23 is arranged on the oil-water discharging pipe 12.
The temperature of the hot water in the hot water storage tank 9 is controlled to be 90-95 ℃.
The oil sludge washing tank 4 comprises a washing tank body 100 and a stirring assembly, the top of the washing tank body 100 is provided with a water inlet 101, an oil sludge inlet 102 and a waste gas outlet 103, the upper part of the outer wall of the washing tank body 100 is provided with an oil-water discharge port 104, the bottom of the washing tank body 100 is provided with a muddy water discharge pipeline 105, the muddy water discharge pipeline 105 is provided with a high-temperature steam branch pipeline 111,
the stirring component comprises a stirring shaft 106, a group of stirring blades 107, a stirring blade fixing ring 108 and a stirring shaft driving motor 109,
the stirring shaft 106 is movably and hermetically arranged at the bottom of the water washing tank body 100, a group of stirring rods 110 is arranged at the top of the stirring blades 107, the stirring blades 107 are annularly and uniformly arranged on the stirring shaft 106, the stirring blade fixing rings 108 are fixedly arranged at the end parts of the stirring blades 107, and the power output shaft of the stirring shaft driving motor 109 is in transmission connection with the stirring shaft 106 through a speed reducer. The stirring speed is variable into a high middle bottom speed and has a positive and negative rotation function.
The stirring shaft 106 is installed at the bottom of the water washing tank 100 through a mechanical sealing device.
The stirring shaft driving motor 109 is installed on the ground below the washing tank 100 through a motor bracket.
The water washing tank 100 is provided with an observation port.
The well drilling oil sludge is added into the water washing tank body 100 through the oil sludge inlet 102, hot water is added through the water inlet 101, high-temperature steam is filled through the high-temperature steam branch pipe 111 to play a role in auxiliary stirring for raw materials in the water washing tank body 100, the stirring shaft driving motor 109 is started to drive the stirring shaft 106 to rotate, the oil sludge and the water in the water washing tank body 100 are stirred through the group of stirring blades 107 to be uniformly mixed, oil in the washed oil sludge floats on the top of the liquid level, mud in the oil sludge is precipitated at the bottom of the water washing tank body 100, the oil water discharge port 104 is opened to discharge the oil and the water, and after the oil at the top layer is discharged, the mud water discharge pipe 105 is connected to discharge the mud and the water deposited in the tank body. The stirring bar 110 may allow for more rapid and uniform stirring.
A three-phase separation process of water-washed drilling oil sludge comprises the following steps:
s1, classification treatment of drilling oil sludge: the semi-flowing oil sludge and the flowing oil sludge in the well drilling oil sludge are stored in a semi-flowing oil sludge pool and a flowing oil sludge tank in a distinguishing way;
s2, solar water supply: hot water is produced by a solar water heater and then is stored in a hot water storage tank, and a water inlet pipe of the solar water heater is connected with a return water storage tank;
s3, washing the drilling oil sludge: adding the drilling oil sludge conveyed by a semi-flow oil sludge pool and a flow oil sludge tank into an oil sludge washing tank, then adding hot water conveyed by a hot water storage tank, controlling the temperature of the hot water to be 90-95 ℃, and adding a cleaning agent into the oil sludge washing tank to carry out water washing treatment on the drilling oil sludge;
s4, oil-water separation: oil and water in the oil sludge washing tank overflows to an oil-water separation tank for oil-water separation, the separated crude oil enters a crude oil storage tank, and the separated water is recycled to a return water storage tank;
s5, plate and frame filter pressing: and conveying the mud water in the oil sludge washing tank to a plate-and-frame filter press through a mud-water pump for filter pressing to obtain dried mud and filtrate water, and recovering the filtrate water to a return water storage tank.
The process is a domestic decrement harmless process. The heat of the solar water heater is used for adding a medicament to carry out three-phase classification in the washing tank, and then oil-water separation and mud-water classification are carried out. The water can be recycled, the oil can be refined, and the mud can reach the standard and can be utilized harmlessly. The oil content of the dried mud is 0.5 to 3 percent, reaches the national harmless standard, and can be used for making bricks.
The above embodiments are merely illustrative of the technical solutions and features of the present invention, and the purpose thereof is to better enable those skilled in the art to practice the invention, and it is not intended to limit the scope of the invention, and all equivalent changes and modifications made according to the spirit of the present invention are within the scope of the present invention, wherein the prior art is not described in detail.
Claims (10)
1. A three-phase separation process of water-washed drilling oil sludge is characterized by comprising the following steps:
s1, classification treatment of drilling oil sludge: the semi-flowing oil sludge and the flowing oil sludge in the well drilling oil sludge are stored in a semi-flowing oil sludge pool and a flowing oil sludge tank in a distinguishing way;
s2, solar water supply: hot water is produced by a solar water heater and then is stored in a hot water storage tank, and a water inlet pipe of the solar water heater is connected with a return water storage tank;
s3, washing the drilling oil sludge: adding the drilling oil sludge conveyed by a semi-flow oil sludge pool and a flow oil sludge tank into an oil sludge washing tank, then adding hot water conveyed by a hot water storage tank, controlling the temperature of the hot water to be 90-95 ℃, and adding a cleaning agent into the oil sludge washing tank to carry out water washing treatment on the drilling oil sludge;
s4, oil-water separation: oil and water in the oil sludge washing tank overflows to an oil-water separation tank for oil-water separation, the separated crude oil enters a crude oil storage tank, and the separated water is recycled to a return water storage tank;
s5, plate and frame filter pressing: and conveying the mud water in the oil sludge washing tank to a plate-and-frame filter press through a mud-water pump for filter pressing to obtain dried mud and filtrate water, and recovering the filtrate water to a return water storage tank.
2. The process for water washing and three-phase separation of drilling oil sludge according to claim 1, wherein the production line comprises a solar water heater, a semi-flow oil sludge pool, a flow oil sludge tank, an oil sludge washing tank, an oil-water separator, a crude oil storage tank, a plate-and-frame filter press, a backwater storage tank and a hot water storage tank;
the water inlet end and the water outlet end of the solar water heater are respectively connected with the return water storage tank and the hot water storage tank through pipelines, and the hot water storage tank is connected to the oil sludge washing tank through a pipeline;
the bottom of the semi-flowing oil sludge pool is connected with a first oil sludge conveying pipe, the bottom of the flowing oil sludge tank is connected with a second oil sludge conveying pipe, and the end parts of the first oil sludge conveying pipe and the second oil sludge conveying pipe are connected with a feeding pipe of the oil sludge tank;
an oil-water discharge hole in the upper part of the oil sludge washing tank is connected to the oil-water separator through an oil-water discharge pipe, an oil outlet of the oil-water separator is connected to the crude oil storage tank through an oil discharge pipe, a water outlet of the oil-water separator is connected to a water return pipe through a drainage pipe and a water suction pump, and the end part of the water return pipe is connected to the water return storage tank;
and a sludge water discharge hole at the bottom of the sludge washing tank is connected to the plate-and-frame filter press through a sludge water discharge pipe and a sludge water pump, and a water discharge hole of the plate-and-frame filter press is connected with the water return pipeline.
3. The process of claim 2, wherein the first sludge transfer pipe and the second sludge transfer pipe are provided with sludge discharge valves and sludge pumps.
4. The process of claim 2, wherein a water return pump is arranged on the water return pipeline.
5. The process of claim 2, wherein the oil-water discharge pipe is provided with an oil drain valve.
6. The process of claim 2, wherein the temperature of the hot water in the hot water storage tank is controlled to be 90-95 ℃.
7. The process of claim 2, wherein the sludge wash tank comprises a wash tank and a stirring assembly,
the top of the washing tank body is provided with a water inlet, an oil sludge inlet and a waste gas outlet, the upper part of the outer wall of the washing tank body is provided with an oil-water discharge port, the bottom of the washing tank body is provided with a muddy water discharge pipeline, the muddy water discharge pipeline is provided with a high-temperature steam branch pipeline,
the stirring component comprises a stirring shaft, a group of stirring blades, a stirring blade fixing ring and a stirring shaft driving motor,
the stirring shaft is movably and hermetically arranged at the bottom of the washing tank body, a group of stirring rods is arranged at the top of each stirring blade, a group of stirring blades are uniformly distributed on the stirring shaft in an annular mode, the stirring blade fixing rings are fixedly arranged at the ends of the group of stirring blades, and a power output shaft of a driving motor of the stirring shaft is connected with the stirring shaft through a speed reducer in a transmission mode.
8. The process of claim 7, wherein the stirring shaft is mounted at the bottom of the water-washing tank body through a mechanical sealing device.
9. The process of claim 7, wherein the agitator shaft drive motor is mounted on the ground below the wash tank via a motor bracket.
10. The process of claim 7, wherein the water wash tank is provided with a viewing port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110965335.7A CN113501641A (en) | 2021-08-23 | 2021-08-23 | Three-phase separation process for oil sludge of water-washing drilling well |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110965335.7A CN113501641A (en) | 2021-08-23 | 2021-08-23 | Three-phase separation process for oil sludge of water-washing drilling well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115477459A (en) * | 2022-09-24 | 2022-12-16 | 陕西艾潽机械制造有限公司 | Oil sludge treatment system |
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