CN117844521B - Full-gravity balance shale oil dehydration integrated device - Google Patents
Full-gravity balance shale oil dehydration integrated device Download PDFInfo
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- CN117844521B CN117844521B CN202410257367.5A CN202410257367A CN117844521B CN 117844521 B CN117844521 B CN 117844521B CN 202410257367 A CN202410257367 A CN 202410257367A CN 117844521 B CN117844521 B CN 117844521B
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- 230000018044 dehydration Effects 0.000 title claims abstract description 90
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 90
- 239000003079 shale oil Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 230000005684 electric field Effects 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 52
- 238000009826 distribution Methods 0.000 claims abstract description 35
- 239000003921 oil Substances 0.000 claims description 48
- 238000011010 flushing procedure Methods 0.000 claims description 16
- 239000010779 crude oil Substances 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 7
- 230000003311 flocculating effect Effects 0.000 claims 2
- 239000000839 emulsion Substances 0.000 abstract description 11
- 238000005406 washing Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 230000000694 effects Effects 0.000 description 10
- 239000003345 natural gas Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
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Abstract
The invention relates to the technical field of oilfield oil-gas-water treatment, in particular to a full-gravity balance shale oil dehydration integrated device, which comprises a sledge body, wherein a pre-separation cavity, a dehydration cavity, an oil cavity and a water cavity are sequentially arranged in the sledge body from an inlet end; a dehydration cavity overflow plate I is arranged between the pre-separation cavity and the dehydration cavity, and a dehydration cavity overflow plate II is arranged between the dehydration cavity and the oil cavity; the cyclone separator is arranged on the sledge body, and the bottom of the cyclone separator extends into the pre-separation cavity; an overflow weir plate is arranged in the pre-separation cavity, the bottom of the overflow weir plate is connected with a liquid distribution pipe, and the liquid distribution pipe penetrates through the first overflow plate of the dehydration cavity and extends into the dehydration cavity; the high-frequency electric field polar plate is arranged above the liquid distribution pipe, the liquid distribution pipe is positioned below an oil-water interface in the dewatering cavity, water washing is realized, the high-frequency electric field polar plate is positioned above the oil-water interface in the dewatering cavity, a multi-gradient electric field is formed, emulsion dewatering is performed, and efficient dewatering of high-water shale oil is realized.
Description
Technical Field
The invention relates to the technical field of oil, gas and water treatment in oil fields, in particular to a full-gravity balance shale oil dehydration integrated device.
Background
Shale oil refers to petroleum resources contained in shale layers mainly comprising shale, and has the characteristics of different components and different properties compared with conventional petroleum. The shale oil is brown paste at normal temperature, has pungent smell, the wax content is about 25% -30%, the relative density of crude oil is generally 0.75-0.95, the properties of crude oil, the emulsification degree difference and the dehydration difficulty of different layers of different wells and different production time periods of the same well are shown in actual production, and the shale oil water content is about 50% and is emulsion.
In actual production, shale oil cannot be treated into purified oil by using the traditional thermochemical sedimentation dehydration process, but the conventional AC/DC electrochemical dehydration process can only dehydrate low-water crude oil with the water content below 30%, but has poor effect, extremely unstable operation, easy occurrence of cross-electric field condition and incapability of carrying out AC/DC electric field dehydration on high water content. In order to meet the large-scale development requirement of shale oil, the invention provides a full-gravity balance shale oil dehydration integrated device, which can realize that shale oil liquid with water content below 70% is directly treated into qualified purified oil with water content less than or equal to 0.5%.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a shale oil dehydration integrated device which is integrated with the functions of steady flow, multi-gradient high-frequency pulse electric field dehydration and the like under the full-gravity full-balance condition.
The technical scheme adopted for solving the technical problems is as follows:
The full-gravity balance shale oil dehydration integrated device comprises a sledge body, wherein a pre-separation cavity, a dehydration cavity, an oil cavity and a water cavity are sequentially formed in the sledge body from an inlet end; a dehydration cavity overflow plate I is arranged between the pre-separation cavity and the dehydration cavity, and a dehydration cavity overflow plate II is arranged between the dehydration cavity and the oil cavity; the cyclone separator is arranged on the sledge body, the bottom of the cyclone separator extends into the pre-separation cavity, and the oil, gas and water mixed liquid enters the pre-separation cavity through the cyclone separator and is subjected to gas-liquid separation under the action of gravity; an overflow weir plate is arranged in the preseparation cavity, the bottom of the overflow weir plate is connected with a liquid distribution pipe, the liquid distribution pipe penetrates through the overflow plate I of the dehydration cavity and extends into the dehydration cavity, emulsion overflows to the liquid distribution pipe through the overflow weir plate, enters the dehydration cavity after being uniformly distributed, and overflows to an oil cavity through the overflow plate II of the dehydration cavity after being dehydrated to purified oil; a high-frequency electric field polar plate is arranged above the liquid distribution pipe, the liquid distribution pipe is positioned below an oil-water interface in the dewatering cavity, water washing is realized, and the high-frequency electric field polar plate is positioned above the oil-water interface in the dewatering cavity, so that a multi-gradient electric field is formed, and emulsion dewatering is performed; the water level regulator is arranged on the sledge body, the lower end of the water level regulator is communicated with the dehydration cavity through the dehydration cavity overflow plate II, the communicated position is positioned below an oil-water interface in the dehydration cavity, the oil-water interface in the dehydration cavity is regulated by setting the height of a water outlet of the water level regulator through the U-shaped pipe principle, and the stability of the oil-water interface is ensured.
Further, the high-frequency electric field polar plate comprises a high-frequency direct current polar plate and a high-frequency alternating current polar plate which are arranged up and down, a section of high-frequency alternating current electric field is formed between the oil-water interface and the high-frequency alternating current polar plate, and two sections of high-frequency direct current electric fields are formed between the high-frequency alternating current polar plate and the high-frequency direct current polar plate, so that a multi-gradient multi-parameter electric field is formed.
Further, the high-frequency alternating current electric field and the high-frequency direct current electric field are respectively controlled by a high-frequency high-voltage intelligent dehydration power supply control cabinet to control three parameters of electric field frequency, voltage and duty ratio and dehydration self-adaptation with different water contents, the high-frequency direct current electric field is arranged on the upper layer of the high-frequency alternating current electric field, the high-frequency alternating current electric field is used for initially feeding into a dehydration cavity to remove high water content, and crude oil is dehydrated from 70% to below 10% and enters into a high-frequency direct current electric field region to remove water content to be less than or equal to 0.5% of qualified purified oil.
Furthermore, the liquid distribution pipe adopts an H-shaped liquid distribution pipe, uniform liquid distribution is realized through the H-shaped liquid distribution, and emulsion can uniformly pass through an electric field region.
Further, a back flushing pipe is arranged in the pry body and is connected with a back flushing manifold outside the pry body. Under the condition of no production stopping, the water can enter the back flushing pipe in the cavity through the back flushing manifold.
Furthermore, a flocculate pipe is arranged in the dewatering cavity, a drain manifold is arranged at the bottom of the pry body, the flocculate pipe is positioned at the position of an oil-water interface in the dewatering cavity and is communicated with the drain manifold through a pipeline, and sewage flows out through the drain manifold to realize cleaning and sewage discharge without stopping production.
Further, the top of the cyclone separator is communicated with an air inlet formed in the sledge body through a pipeline, and the air inlet is communicated with the pre-separation cavity. The gas phase separated by the cyclone separator enters a pre-separation cavity through a gas inlet for further gas-liquid separation.
An L-shaped pipeline is arranged in the cyclone separator, the upper end of the L-shaped pipeline is positioned at the upper part in the cyclone separator, and the lower end of the L-shaped pipeline passes through the side wall of the cyclone separator and is communicated with the pre-separation cavity.
Further, a liquid separation bag is arranged on the pry body, the top of the pre-separation cavity, the top of the dewatering cavity and the top of the oil cavity are communicated, so that the gas phase space of each cavity is communicated, and natural gas enters the natural gas system through a gas outlet after passing through the liquid separation bag.
Furthermore, the bottom of the dehydration cavity and the bottom of the oil cavity are both connected with a water outlet, and the bottom of the oil cavity is also connected with an oil outlet.
Further, an oil-water interface instrument is arranged in the dewatering cavity, and the water outlet and the oil outlet are respectively provided with an electric valve; the oil cavity and the water cavity are internally provided with liquid level meters; and a pressure gauge is arranged in the pry body.
Further, an ultrasonic device is arranged in the pre-separation cavity.
The invention has the technical effects that:
compared with the prior art, the full-gravity balance shale oil dehydration integrated device has the following advantages:
(1) The full-gravity balance shale oil dehydration integrated device realizes gas-liquid separation through the cyclone separator, and avoids disturbance influence on dehydration effect caused by a large amount of gas phase entering the dehydration cavity; liquid enters a high-frequency electric field through a pre-separation cavity overflow weir plate and a liquid distribution pipe, so that dehydration is realized until purified oil overflows to an oil cavity, and then metering and outputting are performed; collecting water from the produced water to a water cavity through a water level regulator, and then measuring and delivering the produced water; the natural gas is delivered to a natural gas system after pressure regulation and measurement;
(2) The multi-gradient high-frequency electric field is arranged in the dehydration cavity of the full-gravity balance shale oil dehydration integrated device, the voltage, the frequency and the pole plate distance of each section of electric field are reasonably determined, three parameters of frequency, voltage and duty ratio are self-adaptive, and high-efficiency dehydration can be realized by adopting different electric field combinations;
(3) An H-shaped liquid distribution pipe is arranged in a dewatering cavity of the full-gravity balance shale oil dewatering integrated device, the pipe diameter and the opening diameter of the liquid distribution pipe are reasonably determined according to different treatment scales, uniform liquid distribution is realized, and the liquid distribution pipe is below an oil-water interface, so that water washing is realized;
(4) Electric and mechanical adjustment is arranged in the full-gravity balance shale oil dehydration integrated device, so that the stability of an oil-water interface in the cavity is ensured; the electric adjustment is that the oil-water interfacial level instrument and the dehydration cavity water outlet electric valve realize interlocking control, and the mechanical adjustment is that the U-shaped pipe principle is applied to realize adjustment by setting the height of the water outlet of the water level regulator; the two paths of adjustment are mutually standby, so that the stability of an oil-water interface is ensured;
(5) The gas phase space of the cavity of the full-gravity balance shale oil dehydration integrated device is communicated, the flow of liquid depends on gravity to realize the flow of oil and water in the device, and a full-gravity full-balance space is formed, so that the energy is fully utilized.
Drawings
FIG. 1 is a schematic structural diagram of a full-gravity balance shale oil dehydration integrated device according to embodiment 1 of the present invention;
FIG. 2 is a top view of the full gravity balance shale oil dewatering integrated device of example 1 of the present invention;
FIG. 3 is a top view of a liquid distribution pipe according to embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a full-gravity balance shale oil dehydration integrated device according to embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of a full-gravity balance shale oil dehydration integrated device in embodiment 3 of the present invention.
In the figure, 1, an oil-gas-water mixed liquid inlet; 2. a cyclone separator; 3. a preseparation chamber; 4. an overflow weir plate; 5. a liquid distribution pipe; 6. an oil-water interface; 7. a high frequency alternating current polar plate; 8. a high frequency DC polar plate; 9. a dehydration cavity overflow plate I; 10. an oil chamber; 11. an oil outlet; 12. a water level regulator; 13. a water chamber; 14. a gas inlet; 15. a dewatering cavity; 16. a liquid separation bag; 17. a gas outlet; 18. a transformer; 19. a drain manifold; 20. back flushing a manifold; 21. a back flushing pipe; 22. a floc tube; 23. a dehydration cavity overflow plate II; 24. an air vent; 25. a water outlet; 26. an L-shaped pipeline; 27. an ultrasonic device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings of the specification.
Example 1:
As shown in fig. 1 and 2, the full-gravity balance shale oil dehydration integrated device according to the embodiment comprises a sledge body, wherein a pre-separation cavity 3, a dehydration cavity 15, an oil cavity 10 and a water cavity 13 are sequentially arranged in the sledge body from an inlet end; a first dehydration cavity overflow plate 9 is arranged between the pre-separation cavity 3 and the dehydration cavity 15, and a second dehydration cavity overflow plate 23 is arranged between the dehydration cavity 15 and the oil cavity 10.
The cyclone separator 2 is arranged on the skid body, the oil-gas-water mixed liquid inlet 1 is arranged on the side wall of the cyclone separator 2, the oil-gas-water mixed liquid inlet 1 is positioned outside the skid body, the bottom of the cyclone separator 2 extends into the pre-separation cavity 3, and oil-gas-water mixed liquid enters the pre-separation cavity 3 through the cyclone separator 2 and is subjected to gas-liquid separation under the action of gravity.
The overflow weir plate 4 is arranged in the preseparation cavity 3, the bottom of the overflow weir plate 4 is connected with the liquid distribution pipe 5, the liquid distribution pipe 5 penetrates through the dewatering cavity overflow plate I9 to extend into the dewatering cavity 15, the liquid distribution pipe 5 adopts an H-shaped liquid distribution pipe (shown in figure 3), emulsion overflows to the liquid distribution pipe 5 through the overflow weir plate 4, enters the dewatering cavity 15 after being uniformly distributed, and overflows to the oil cavity 10 through the dewatering cavity overflow plate II 23 after being dewatered to clean oil.
The high-frequency electric field polar plate is arranged above the liquid distribution pipe 5 and comprises a high-frequency direct current polar plate 8 and a high-frequency alternating current polar plate 7 which are arranged up and down, a section of high-frequency alternating current electric field is formed between an oil-water interface 6 and the high-frequency alternating current polar plate 7, two sections of high-frequency direct current electric fields are formed between the high-frequency alternating current polar plate 7 and the high-frequency direct current polar plate 8, a multi-gradient multi-parameter electric field is formed, the high-frequency alternating current electric field and the high-frequency direct current electric field are controlled by a high-frequency high-voltage intelligent dehydration power control cabinet to be self-adaptive to dehydration of three parameters of electric field frequency, voltage and duty ratio and different water contents, the high-frequency direct current electric field is arranged on the upper layer of the high-frequency alternating current electric field, the high-frequency alternating current electric field is used for dehydrating the initial dehydration cavity to be dehydrated, and the water content of crude oil is dehydrated from 70% to 10% below and enters the high-frequency direct current electric field area to be dehydrated to be less than 0.5% qualified purified oil. The skid body is provided with a transformer 18 matched with the high-frequency electric field polar plate. The liquid distribution pipe 5 is positioned below the oil-water interface 6 in the dewatering cavity 15, water washing is realized, and the high-frequency electric field polar plate is positioned above the oil-water interface 6 in the dewatering cavity 15, so that a multi-gradient electric field is formed, and emulsion dewatering is performed.
The water level regulator 12 is arranged on the sledge body, the lower end of the water level regulator 12 passes through the second dewatering cavity overflow plate 23 to be communicated with the dewatering cavity 15, and the communicating position is positioned below the oil-water interface 6 in the dewatering cavity 15. The U-shaped pipe principle is applied to adjust the oil-water interface 6 in the dewatering cavity 15 by setting the height of the water outlet of the water level regulator 12, so that the stability of the oil-water interface 6 is ensured.
A back flushing pipe 21 is arranged in the pry body, the back flushing pipe 21 is connected with a back flushing manifold 20 outside the pry body, and a sewage drain manifold 19 is arranged at the bottom of the pry body; a flocculate pipe 22 is arranged in the dehydration cavity 15, and the flocculate pipe 22 is positioned at the position of the oil-water interface 6 in the dehydration cavity 15 and is communicated with a sewage manifold 19 through a pipeline. Under the condition of no production stopping, the sewage can enter a back flushing pipe 21 in the cavity through a back flushing manifold 20 and then flow out through a sewage draining manifold 19, so that the cleaning and sewage draining without production stopping are realized. The pre-separation chamber 3, the dewatering chamber 15, the oil chamber 10 and the water chamber 13 are respectively provided with a back flushing pipe 21, and the back flushing pipe 21 can be arranged in any one or more chambers. The pre-separation chamber 3, the dewatering chamber 15, the oil chamber 10 and the water chamber 13 are all communicated with the drain manifold 19, and any one or more of the chambers can be communicated with the drain manifold 19.
The top of the cyclone separator 2 is communicated with an air inlet 14 formed in the sledge body through a pipeline, and the air inlet 14 is communicated with the pre-separation cavity 3. The gas phase separated by the cyclone separator 2 enters the pre-separation cavity 3 through the gas inlet 14 for further gas-liquid separation. The skid body is provided with a liquid separation bag 16, the top parts of the pre-separation cavity 3, the dewatering cavity 15 and the oil cavity 10 are communicated, so that the gas phase spaces of the cavities are communicated, and natural gas enters a natural gas system through a gas outlet 17 after passing through the liquid separation bag 16. The sled body is provided with the vent 24, and gas in the sled body can be discharged from the vent 24, so that the overpressure discharge requirement is met. The bottom of the dehydration cavity 15 and the bottom of the oil cavity 10 are connected with a water outlet 25, and the bottom of the oil cavity 10 is also connected with an oil outlet 11.
The dehydration cavity 15 is internally provided with an oil-water level gauge, the water outlet 25 and the oil outlet 11 are respectively provided with an electric valve, so that constant level control is realized or the level control is realized by adjusting the water level regulator 12, and two paths are reserved for each other. The oil cavity 10 and the water cavity 13 are internally provided with liquid level meters which are interlocked with the electric valves of the oil outlet 11 and the water outlet 25 to realize constant liquid level control; the pressure gauge is arranged in the pry body, constant-pressure operation of the cavity is realized by the pressure gauge and the electric valve configured at the natural gas outlet, and the gravity flow is realized by liquid in the pry body from inlet to outlet, so that no pressure loss is caused.
When the oil-gas-water mixed liquid is used, oil-gas-water mixed liquid enters the pre-separation cavity 3 through the oil-gas-water mixed liquid inlet 1 and enters the oil-gas-water mixed liquid inlet 2, gas-liquid separation is carried out under the action of gravity, emulsion overflows to the liquid distribution pipe 5 through the overflow weir plate 4 of the pre-separation cavity, enters the dehydration cavity 15 after being uniformly distributed into liquid through H-shaped, and overflows to the oil cavity 10 through the overflow plate 23 of the dehydration cavity after being dehydrated to purify oil, and is regulated for metering and then is output.
The gas phase separated by the cyclone separator 2 enters the pre-separation cavity 3 through the gas inlet 14 for further gas-liquid separation, and the natural gas in the dehydration cavity 15 enters the natural gas system through the gas outlet 17 after passing through the liquid separation bag 16.
The water separated from the dewatering cavity 15 enters a downstream water treatment system through a water outlet 25 or enters a produced water treatment system after being received by a water level regulator 12 and then enters a water cavity 13.
The dehydration cavity is internally provided with a multi-gradient multi-parameter electric field according to the different water contents of the emulsion, a section of high-frequency alternating current electric field is formed between an oil-water interface 6 and a high-frequency alternating current polar plate 7, and two sections of high-frequency direct current electric fields are formed between the high-frequency alternating current polar plate 7 and a high-frequency direct current polar plate 8, wherein the first section of high-frequency alternating current electric field dehydrates the emulsion with the water content of 40% to 5%, and the second section of high-frequency direct current electric field dehydrates the emulsion with the water content of 5% to reach the standard to purify the oil.
The cyclone separator 2 and the pre-separation cavity 3 realize steady flow liquid distribution and gas-liquid primary separation, prevent a large amount of gas phase from entering along with liquid to cause disturbance to the dehydration cavity 15, influence water drop aggregation and drop, and ensure the treatment effect of the dehydration cavity 15.
The shale oil dehydration integrated device provided by the invention has the functions of steady flow, multi-gradient multi-parameter high-frequency pulse electric field dehydration, buffering, metering and the like under the full-gravity full-balance condition, and realizes the efficient dehydration of the high-water-content shale oil.
Example 2:
as shown in fig. 4, the main structure of the full-gravity balance shale oil dehydration integrated device according to this embodiment is substantially the same as that of embodiment 1, and the difference is that:
An L-shaped pipeline 26 is arranged in the cyclone separator 2, the upper end of the L-shaped pipeline 26 is positioned at the upper part in the cyclone separator 2, the lower end of the L-shaped pipeline 26 passes through the side wall of the cyclone separator 2 and is communicated with the pre-separation cavity 3, and gas phase separated by the cyclone separator 2 enters the pre-separation cavity 3 through a gas outlet at the lower end of the L-shaped pipeline 26 for further gas-liquid separation. A liquid level meter is arranged in the overflow weir plate 4.
Example 3:
As shown in fig. 5, the main structure of the full-gravity balance shale oil dehydration integrated device according to this embodiment is substantially the same as that of embodiment 1, and the difference is that:
An ultrasonic device 27 is arranged in the preseparation cavity 3, the viscosity of crude oil is greatly reduced under the action of the ultrasonic device 27, the fluidity is enhanced, the strength of an oil-water interface film is greatly reduced, and the demulsification effect is enhanced.
The ultrasonic device 27 mainly comprises a transducer and an ultrasonic power supply, and is provided with proper frequency and sound intensity according to different emulsification degrees of crude oil, the general frequency is 22+/-1 kHz, the sound intensity is required to be lower than the cavitation threshold value of the crude oil, and the ultrasonic device is subjected to ultrasonic treatment in a preseparation cavity for 12-30 min to achieve the effect of enhancing demulsification. By setting reasonable frequency and sound intensity, the mechanical vibration of ultrasonic wave promotes the oil-water to generate displacement and diffusion effects, accelerates the collision and agglomeration of water particles, reduces the strength of an oil-water interface film, strengthens the mixing effect of a demulsifier, and increases the demulsification effect; the thermal effect of ultrasonic waves through boundary friction and acoustic energy conversion can reduce the oil and water interfacial film strength and crude oil viscosity.
The above embodiments are merely examples of the present invention, and the scope of the present invention is not limited to the above embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present invention, shall fall within the scope of the present invention.
Claims (8)
1. The utility model provides a full gravity balance shale oil dehydration integrated device which characterized in that: the device comprises a sledge body, wherein a pre-separation cavity (3), a dehydration cavity (15), an oil cavity (10) and a water cavity (13) are sequentially arranged in the sledge body from an inlet end; a dehydration cavity overflow plate I (9) is arranged between the pre-separation cavity (3) and the dehydration cavity (15), and a dehydration cavity overflow plate II (23) is arranged between the dehydration cavity (15) and the oil cavity (10); the cyclone separator (2) and the water level regulator (12) are arranged on the sledge body, the bottom of the cyclone separator (2) extends into the pre-separation cavity (3), and oil-gas-water mixed liquid enters the pre-separation cavity (3) through the cyclone separator (2); an overflow weir plate (4) is arranged in the pre-separation cavity (3), the bottom of the overflow weir plate (4) is connected with a liquid distribution pipe (5), and the liquid distribution pipe (5) passes through a first dewatering cavity overflow plate (9) and extends into a dewatering cavity (15); a high-frequency electric field polar plate is arranged above the liquid distribution pipe (5), the liquid distribution pipe (5) is positioned below an oil-water interface (6) in the dewatering cavity (15), and the high-frequency electric field polar plate is positioned above the oil-water interface (6) in the dewatering cavity (15) to form a multi-gradient electric field; the lower end of the water level regulator (12) passes through a dewatering cavity overflow plate II (23) to be communicated with the dewatering cavity (15), and the communication part is positioned below an oil-water interface (6) in the dewatering cavity (15);
the high-frequency electric field polar plate comprises a high-frequency direct current polar plate (8) and a high-frequency alternating current polar plate (7) which are arranged up and down, a section of high-frequency alternating current electric field is formed between the oil-water interface (6) and the high-frequency alternating current polar plate (7), and two sections of high-frequency direct current electric fields are formed between the high-frequency alternating current polar plate (7) and the high-frequency direct current polar plate (8);
The high-frequency alternating current electric field and the high-frequency direct current electric field are both self-adaptive in dehydration of three parameters of electric field frequency, voltage and duty ratio controlled by a high-frequency high-voltage intelligent dehydration power supply control cabinet, the high-frequency direct current electric field is arranged on the upper layer of the high-frequency alternating current electric field, the high-frequency alternating current electric field is used for removing water from an initial dehydration cavity, and the water content of crude oil is removed from 70% to below 10% and enters a high-frequency direct current electric field area for dehydration until the water content is less than or equal to 0.5% of qualified purified oil;
The liquid distribution pipe (5) adopts an H-shaped liquid distribution pipe (5);
an ultrasonic device (27) is arranged in the pre-separation cavity (3).
2. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: a back flushing pipe (21) is arranged in the sledge body, and the back flushing pipe (21) is connected with a back flushing manifold (20) outside the sledge body.
3. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: a flocculating matter pipe (22) is arranged in the dehydration cavity (15), a sewage drain manifold (19) is arranged at the bottom of the sledge body, the flocculating matter pipe (22) is positioned at the position of an oil-water interface (6) in the dehydration cavity (15) and is communicated with the sewage drain manifold (19) through a pipeline.
4. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: the top of the cyclone separator (2) is communicated with an air inlet (14) formed in the sledge body through a pipeline, and the air inlet (14) is communicated with the pre-separation cavity (3).
5. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: an L-shaped pipeline (26) is arranged in the cyclone separator (2), the upper end of the L-shaped pipeline (26) is positioned at the upper position in the cyclone separator (2), and the lower end of the L-shaped pipeline passes through the side wall of the cyclone separator (2) and is communicated with the pre-separation cavity (3).
6. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: the skid body is provided with a liquid separating bag (16), and the tops of the pre-separating cavity (3), the dewatering cavity (15) and the oil cavity (10) are communicated, so that the gas phase spaces of the cavities are communicated.
7. The full-gravity balanced shale oil dewatering integrated device according to claim 1, wherein: the bottom of the dehydration cavity (15) and the bottom of the oil cavity (10) are both connected with the water outlet (25), and the bottom of the oil cavity (10) is also connected with the oil outlet (11).
8. The full-gravity balanced shale oil dewatering integrated device according to claim 7, wherein: an oil-water interfacial level meter is arranged in the dehydration cavity (15), and the water outlet (25) and the oil outlet (11) are respectively provided with an electric valve; the oil cavity (10) and the water cavity (13) are internally provided with liquid level meters; and a pressure gauge is arranged in the sledge body.
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| CN202410257367.5A CN117844521B (en) | 2024-03-07 | 2024-03-07 | Full-gravity balance shale oil dehydration integrated device |
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| CN202410257367.5A CN117844521B (en) | 2024-03-07 | 2024-03-07 | Full-gravity balance shale oil dehydration integrated device |
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| CN117844521A CN117844521A (en) | 2024-04-09 |
| CN117844521B true CN117844521B (en) | 2024-05-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE332018A (en) * | 1925-02-14 | 1926-03-31 | ||
| CN1437502A (en) * | 2000-05-10 | 2003-08-20 | Crc废品处理及污染控制有限公司 | Apparatus for electrodewatering |
| CN102041036A (en) * | 2009-10-22 | 2011-05-04 | 江苏三星化工有限公司 | Novel high-speed electro-desalting power supply |
| CN111606472A (en) * | 2020-05-19 | 2020-09-01 | 森诺科技有限公司 | Cavitation air-float treatment method for oil extraction sewage |
-
2024
- 2024-03-07 CN CN202410257367.5A patent/CN117844521B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE332018A (en) * | 1925-02-14 | 1926-03-31 | ||
| CN1437502A (en) * | 2000-05-10 | 2003-08-20 | Crc废品处理及污染控制有限公司 | Apparatus for electrodewatering |
| CN102041036A (en) * | 2009-10-22 | 2011-05-04 | 江苏三星化工有限公司 | Novel high-speed electro-desalting power supply |
| CN111606472A (en) * | 2020-05-19 | 2020-09-01 | 森诺科技有限公司 | Cavitation air-float treatment method for oil extraction sewage |
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