CN111437631A - Gas-liquid separation device and separation method thereof - Google Patents
Gas-liquid separation device and separation method thereof Download PDFInfo
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- CN111437631A CN111437631A CN202010337364.4A CN202010337364A CN111437631A CN 111437631 A CN111437631 A CN 111437631A CN 202010337364 A CN202010337364 A CN 202010337364A CN 111437631 A CN111437631 A CN 111437631A
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- 239000007788 liquid Substances 0.000 title claims abstract description 382
- 238000000926 separation method Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 4
- 230000003116 impacting effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 46
- 239000007789 gas Substances 0.000 abstract description 46
- 239000012530 fluid Substances 0.000 abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000007872 degassing Methods 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- 239000007921 spray Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
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Abstract
The invention discloses a gas-liquid separation device and a separation method thereof, relating to the field of petroleum and natural gas exploitation, wherein the gas-liquid separation device comprises: the lower end of the tank body is provided with a liquid discharge port, and the upper end of the tank body is provided with an air outlet port; a liquid inlet pipe extending into the tank body; the infrared emitter is arranged on the liquid inlet pipe and used for heating gas in the gas-liquid mixed liquid flowing through the liquid inlet pipe; a centrifugal mechanism, comprising: the centrifugal impeller is connected to the driving shaft and arranged at the outlet of the liquid inlet pipe; a plasma generator mounted on the driving shaft; the liquid guide plate is arranged in the tank body, extends to the inner side wall of the tank body from the side wall of the liquid inlet pipe, and is used for receiving gas-liquid mixed liquid sprayed out of the centrifugal impeller; and the pulse vibrator is arranged on the liquid guide plate. The gas separation device can separate gas in the drilling fluid at high temperature and high pressure, so that the frequency of drilling accidents such as blowout and the like is reduced.
Description
Technical Field
The invention relates to the field of petroleum and natural gas exploitation, in particular to a gas-liquid separation device and a separation method thereof.
Background
With the continuous deepening of exploration and development, the engineering geological conditions of well drilling are more and more complex, and the drilling gradually moves to the high-temperature and high-pressure geological environment, so that the technical challenges are more and more increased, and well drilling accidents are more and more frequent. Among many accidents, gas invasion is one of the most common types of accidents, and gas invasion refers to the phenomenon in which gas in the formation invades the drilling fluid while drilling into the formation. If the gas-invaded drilling fluid is not degassed in time, the density of the drilling fluid is reduced after multiple cycles, so that the pressure of a hydrostatic column in the whole shaft is reduced, and blowout accidents are easily caused in high-temperature and high-pressure formations. In addition, if the degassing treatment of the drilling fluid is not timely and thorough enough, the viscosity and the shear force of the drilling fluid are increased, the original performance is damaged, and the efficiency of the slurry pump is reduced.
Disclosure of Invention
At present, the devices for degassing drilling fluid generally have four types, which are respectively: a split-flow tank type vacuum degasser, a vortex pump vacuum jet type degasser, an atmosphere degasser and a centrifugal vacuum degasser.
The principle of the shunting type tank vacuum processor mainly depends on that the drilling fluid is spread to be thin in a large area, and a large amount of bubbles are exposed to the surface to be broken when the drilling fluid rolls and moves forwards, so that the aim of eliminating the bubbles in the drilling fluid is achieved.
The principle of the vortex pump vacuum jet type deaerator is that a vortex pump with high rotating speed is used for generating certain vacuum, drilling fluid is sucked through a suction pipe in a mud tank, when the drilling fluid reaches the top of the suction pipe, the drilling fluid is blocked by a baffle and is forced to refract around a spraying tank, when the fluid flow impacts a tank wall at high speed, bubbles are forced to extrude to cause surface breakage, and meanwhile, when the drilling fluid flows down along the tank wall in the jetting process, the bubbles in the drilling fluid are continuously exposed to the surface of the liquid and are broken. However, the efficiency of the vacuum jet type deaerator of the vortex pump is low, so that the power required per unit displacement is large, and therefore, the deaerator is not suitable for treating high-viscosity drilling fluid which is often used in high-temperature and high-pressure operation.
The atmospheric jet mainly depends on jet to impact and extrude bubbles, so that the bubbles are extruded to the surface of the drilling fluid to be broken. Therefore, the magnitude of the injection velocity directly affects the degassing efficiency. The jet velocity is mainly influenced by the submergence depth of the deaerator, and the deeper the submergence is, the higher the jet velocity is. However, the atmospheric air ejector is not easy to operate, and the impeller is easily worn, so that it is not suitable for use in a high-strength work environment with high temperature and high pressure.
The principle of the centrifugal vacuum degasser is that the whole degasser is immersed in a mud tank, bottom mud is pumped into the upper part of a shell along the peripheral wall of the shell by rotating a hollow shaft in a reduction box, and finally drilling fluid performs circular motion, so that a centrifugal force field is formed, bubbles rapidly move towards the axial center direction under the action of centrifugal force and break when reaching the inner wall of a rotating drilling fluid column, and the purpose of removing gas in the drilling fluid is achieved. However, even when the degasser is not used, half of the cylinder body is soaked in the drilling fluid, so that sand setting corrosion is easily caused, and the non-production time of drilling operation is increased.
In order to overcome the above defects in the prior art, embodiments of the present invention provide a gas-liquid separation device and a separation method thereof, which can separate gas in drilling fluid at high temperature and high pressure, so as to reduce the frequency of drilling accidents such as blowout.
The specific technical scheme of the embodiment of the invention is as follows:
a gas-liquid separation device, comprising:
the lower end of the tank body is provided with a liquid discharge port, and the upper end of the tank body is provided with an air outlet port;
a liquid inlet pipe extending into the tank body;
the infrared emitter is arranged on the liquid inlet pipe and used for heating gas in gas-liquid mixed liquid flowing through the liquid inlet pipe;
a centrifugal mechanism, comprising: the centrifugal impeller is connected to the driving shaft and arranged at an outlet of the liquid inlet pipe;
a plasma generator mounted on the drive shaft;
the liquid guide plate is arranged in the tank body, extends to the inner side wall of the tank body from the side wall of the liquid inlet pipe, and is used for receiving a gas-liquid mixed liquid sprayed out of the centrifugal impeller;
and the pulse vibrator is arranged on the liquid guide plate.
Preferably, the outlet of the liquid inlet pipe is generally directed upwards.
Preferably, the pulse vibrator applies pressure pulse to the liquid discharge port by controlling an electromagnetic brake switch of the pulse vibrator, the pressure pulse is realized by inflating and deflating, and the time interval between inflation and deflation is controlled between 0.1 second and 5.0 seconds.
Preferably, the inflation and deflation of the pulse vibrator is a time interval period, and the pulse vibration frequency ranges from 0.1Hz to 5.0 Hz.
Preferably, the infrared heater emits high-intensity infrared rays with a peak wavelength of non-planckian distribution to heat the gas in the gas-liquid mixed solution, so that bubbles in the gas-liquid mixed solution are sufficiently vaporized.
Preferably, the liquid guide plate comprises a horizontal part close to the liquid inlet pipe and an inclined part close to the inner side wall of the tank body, the inclined part extends upwards from the liquid inlet pipe to the inner side wall of the tank body, and the pulse vibrator is mounted on the inclined part of the liquid guide plate.
Preferably, the outlet of the liquid inlet pipe is provided with an outer edge extending along the radial direction of the liquid inlet pipe; the axial line of the centrifugal impeller is parallel to or on the same straight line with the axial line at the outlet of the liquid inlet pipe.
Preferably, the centrifugal mechanism is used for spraying the liquid-liquid mixed liquid discharged from the outlet of the liquid inlet pipe to impact the inner side wall of the tank body.
Preferably, when the gas-liquid separation device performs gas-liquid separation, the inside of the tank is in a vacuum state, and a liquid seal formed by liquid separated from the gas-liquid mixed liquid exists at the bottom of the tank.
A gas-liquid separation method using the gas-liquid separation device according to any one of the above, the gas-liquid separation method comprising the steps of:
inputting the gas-liquid mixed liquid into the tank body from the liquid inlet pipe;
heating the gas in the gas-liquid mixed liquid flowing through the liquid inlet pipe by an infrared emitter so as to fully vaporize bubbles in the gas-liquid mixed liquid;
ejecting the liquid-liquid mixed liquid discharged from the outlet of the liquid inlet pipe to impact the inner side wall of the tank body through a centrifugal mechanism;
in the process that the gas-liquid mixed liquid is sprayed to impact the inner side wall of the tank body by the centrifugal mechanism, the plasma generator emits a plasma flow after the centrifugal action of the centrifugal impeller, the plasma flow breaks separated bubbles to enable the bubbles to form gas to be discharged, and the plasma flow also breaks the bubbles in the gas-liquid mixed liquid which is not centrifuged;
the gas-liquid mixed liquid impacting on the inner side wall of the tank body forms thin-layer turbulent flow along the inner side wall of the tank body and the liquid guide plate and falls into the bottom of the tank body to form a liquid seal;
applying pressure pulses to the gas-liquid mixed liquid in the tank body through a pulse vibrator to enable bubbles which are not broken by the centrifugal mechanism, the plasma generator and the infrared emitter to be subjected to pulse vibration treatment, so that the bubbles in the gas-liquid mixed liquid are broken, and the flow rate of the gas-liquid mixed liquid is increased;
the liquid forming the liquid seal further separates out the gas in the liquid during gravity settling.
The technical scheme of the invention has the following remarkable beneficial effects:
the gas-liquid separation device in this application can carry out effectual gas-liquid separation to the drilling fluid very much, can deal with high temperature high pressure area stratum pore pressure lower comprehensively effectively, and the gas that the narrow scheduling problem of operation density window arouses invades the problem, and help drilling engineer in time invades gas effectively in to the drilling fluid and handles, and in time adjustment well drilling construction measures prevents to appear complicated accident under the highly compressed environment of high temperature.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
FIG. 1 is a schematic structural view of a gas-liquid separation apparatus according to an embodiment of the present invention.
Reference numerals of the above figures:
1. a liquid inlet pipe; 11. an outer edge; 12. an outlet; 2. a centrifugal impeller; 3. a plasma generator; 4. a drive shaft; 5. a liquid guide plate; 51. a horizontal portion; 52. an inclined portion; 6. an air outlet port; 7. a tank body; 8. a liquid discharge port; 9. an infrared emitter; 10. a pulse vibrator.
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to separate gas in drilling fluid at high temperature and high pressure, so as to reduce the frequency of drilling accidents such as blowout, a gas-liquid separation device is proposed in this application, fig. 1 is a schematic structural diagram of the gas-liquid separation device in an embodiment of the present invention, and as shown in fig. 1, the gas-liquid separation device may include: the tank body 7 is provided with a liquid discharge port 8 at the lower end of the tank body 7, and an air outlet port 6 at the upper end of the tank body 7; a liquid inlet pipe 1 extending into the tank 7; the infrared emitter 9 is arranged on the liquid inlet pipe 1, and the infrared emitter 9 is used for heating gas in the gas-liquid mixed liquid flowing through the liquid inlet pipe 1; a centrifugal mechanism, comprising: the driving shaft 4 is connected with the centrifugal impeller 2 on the driving shaft 4, and the centrifugal impeller 2 is arranged at the outlet 12 of the liquid inlet pipe 1; a plasma generator 3 mounted on the drive shaft 4; the liquid guide plate 5 is arranged in the tank body 7, the liquid guide plate 5 extends to the inner side wall of the tank body 7 from the side wall of the liquid inlet pipe 1, and the liquid guide plate 5 is used for receiving gas-liquid mixed liquid sprayed out of the centrifugal impeller 2; and the pulse vibrator 10 is arranged on the liquid guide plate 5.
The gas-liquid separation device in this application can carry out effectual gas-liquid separation to the drilling fluid very much, can deal with high temperature high pressure area stratum pore pressure lower comprehensively effectively, and the gas that the narrow scheduling problem of operation density window arouses invades the problem, and help drilling engineer in time invades gas effectively in to the drilling fluid and handles, and in time adjustment well drilling construction measures prevents to appear complicated accident under the highly compressed environment of high temperature.
In order to better understand the gas-liquid separation device of the present application, it will be further explained and illustrated below. As shown in fig. 1, the can body 7 can endure high temperature and high pressure, and thus, it can be made of a high-strength metal material. In order to enable the gas-liquid mixer ejected by the centrifugal mechanism to uniformly impact on the inner side wall of the tank 7 so as to flow downwards, the main body part of the tank 7 can extend in the vertical direction, and the cross section of the main body part is circular. The lower end of the tank body 7 is provided with a liquid discharge port 8, and the liquid discharge port 8 is used for discharging liquid formed after gas-liquid separation. An air outlet port 6 is formed in the upper end of the tank body 7, and the air outlet port 6 is used for discharging gas formed after gas-liquid separation. The air outlet port 6 may be located at the top of the tank 7 at the upper end of the tank 7, or at the side wall of the tank 7 at the upper end, generally speaking, as long as the air outlet port 6 is higher than the centrifugal impeller 2 in the centrifugal mechanism by a certain distance.
As shown in fig. 1, the liquid inlet pipe 1 extends into the tank 7, and the liquid inlet pipe 1 is used for conveying a gas-liquid mixed liquid to the inside of the tank 7. The gas-liquid mixed liquid can be high-temperature high-pressure well drilling fluid used in the field of oil and gas exploitation. In order to enable the centrifugal mechanism to uniformly shoot the gas-liquid mixed liquid flowing out of the outlet 12 of the liquid inlet pipe 1 to the periphery of the tank body 7, the outlet 12 of the liquid inlet pipe 1 is approximately upward. Vertical direction extension can be followed to feed liquor pipe 1, stretches into to jar body 7 by the bottom of jar body 7 in, so can avoid feed liquor pipe 1 to influence the setting and the installation of drain board 5 when extending. The liquid inlet pipe 1 can be positioned in the center of the tank body 7, so that the distance from the outlet 12 to the inner side wall of the tank body 7 can be equal, and the centrifugal mechanism can uniformly shoot the gas-liquid mixed liquid flowing out of the outlet 12 of the liquid inlet pipe 1 to the periphery of the tank body 7.
As shown in fig. 1, the infrared emitter 9 is installed on the side wall of the liquid inlet pipe 1, and the infrared emitter 9 is used for heating the gas in the gas-liquid mixture flowing through the liquid inlet pipe 1. If the gas-liquid mixed liquid contains bubbles, the infrared heater emits high-intensity infrared rays with peak wavelength which is not Planck distribution to heat the gas in the gas-liquid mixed liquid, so that the bubbles in the gas-liquid mixed liquid are sufficiently vaporized by the high-intensity infrared rays at high temperature. Infrared emitter 9 can be a plurality of, and its extending direction along feed liquor pipe 1 arranges to make infrared emitter 9 can heat gradually the gas-liquid mixture in flowing through feed liquor pipe 1 in proper order, and then effectively improve the percentage that the bubble in the gas-liquid mixture is vaporized.
As shown in fig. 1, the centrifugal mechanism is used for spraying the liquid-liquid mixture discharged from the outlet 12 of the liquid inlet pipe 1 to the inner side wall of the tank 7. The centrifugal mechanism may include: a driving shaft 4 and a centrifugal impeller 2 connected to the driving shaft 4. The driving shaft 4 is used for transmitting torque, and extends into the tank 7 from the outside of the tank 7, so as to drive the centrifugal impeller 2 to rotate. A device such as motor, gearbox for driving drive shaft 4 pivoted can install in the outside of jar body 7 to avoid influencing the separation of gas-liquid in jar body 7. Centrifugal impeller 2 can set up in the export 12 department of feed liquor pipe 1 to the gas-liquid mixture after handling through infrared emitter 9 that will just emerge from the export 12 of feed liquor pipe 1 is handled, sprays the gas-liquid mixture to the inside wall that strikes jar body 7 under centrifugal impeller 2 rotates centrifugal force effect. When the gas-liquid mixed liquid is sprayed to the periphery under the action of the rotating centrifugal force of the centrifugal impeller 2, bubbles in the gas-liquid mixed liquid can be separated to a certain degree, so that the content of the bubbles in the gas-liquid mixed liquid is reduced.
In a possible embodiment, the drive shaft 4 is inserted from the top of the tank 7 into the inside of the tank 7 from the middle in the vertical direction. In addition, the axis of the centrifugal impeller 2 can be parallel to or on the same line as the axis at the outlet 12 of the liquid inlet pipe 1. Through the structure, the gas-liquid mixed liquid sprayed out from the centrifugal impeller 2 by the driving shaft 4 can be effectively prevented from blocking. In order to enable the gas-liquid mixture discharged from the outlet 12 of the liquid inlet pipe 1 to be rotated by the centrifugal impeller 2 as much as possible, but not to directly fall downwards after passing through the side wall of the outlet 12 of the liquid inlet pipe 1 and cannot be rotated by the centrifugal impeller 2, the outlet 12 of the liquid inlet pipe 1 is provided with an outer edge 11 extending along the radial direction of the liquid inlet pipe 1, the outer edge 11 is basically parallel to the centrifugal impeller 2, and the outer edge of the outer edge is basically equal to the outer edge of the centrifugal impeller 2, so that the outer edge 11 cannot cause downward blocking to the gas-liquid mixture sprayed out of the centrifugal impeller 2.
As shown in fig. 1, the plasma generator 3 is mounted on the drive shaft 4. Since the plasma generator includes a wind ring for rotating the gas, it is installed on the driving shaft to ensure a sufficient space around the driving shaft for the gas to rotate. The plasma stream emitted by the plasma generator 3 is used for breaking up the bubbles in the non-centrifuged mixed liquid, and simultaneously, the bubbles separated by the centrifugal mechanism can be broken up, so that gas is formed and discharged. The plasma generator 3 and the centrifugal mechanism are matched with each other, so that the amount of gas separated from the gas-liquid mixed liquid can be effectively increased on the whole, and the content of the gas in the gas-liquid mixed liquid is further reduced.
As shown in fig. 1, the liquid guide plate 5 may be installed inside the tank 7 by welding. The liquid guide plate 5 is provided with a directional liquid guide hole, so that the gas-liquid mixed liquid from the centrifugal impeller 2 can be accurately received and conveyed to the lower part of the liquid guide plate 5. The liquid guide plate 5 extends to the inner side wall of the tank body 7 from the side wall of the liquid inlet pipe 1, and the liquid guide plate 5 is used for receiving gas-liquid mixed liquid ejected from the centrifugal impeller 2. The height of the liquid guide plate 5 is substantially lower than the outlet 12 of the liquid inlet pipe 1. The liquid guide plate 5 is provided with an opening, the opening is used for the liquid inlet pipe 1 to pass through, the liquid guide plate 5 can be connected with the outer wall of the liquid inlet pipe 1, one side of the liquid guide plate 5, which is close to the inner side wall of the tank body 7, in the circumferential direction is closely connected or attached to the inner side wall of the tank body 7, and thus, gas-liquid mixed liquid impacting on the inner side wall of the tank body 7 can flow to the liquid guide plate 5. In order to make the gas-liquid mixture flow downward after flowing to the liquid guide plate 5, the liquid guide plate 5 may include a horizontal portion 51 near the liquid inlet pipe 1 and an inclined portion 52 near the inner sidewall of the tank 7, and the inclined portion 52 extends upward from the liquid inlet pipe 1 toward the inner sidewall of the tank 7. The directional liquid guide holes may be located on the horizontal portion 51. After the gas-liquid mixed liquid ejected from the centrifugal impeller 2 is ejected in a rotating mode through the centrifugal impeller 2 and plasma flow emitted by the plasma generator 3, most of bubbles in the gas-liquid mixed liquid are broken, the gas-liquid mixed liquid with lower gas content flows along the tank body 7 and flows to the liquid guide plate 5 in a parallel flow mode, in the process, the gas-liquid mixed liquid can form thin-layer turbulent flow, a certain circumferential speed is kept in the period to form spiral rotation, and finally the gas-liquid mixed liquid falls into the bottom of the tank body 7. In the process of thin-layer turbulent flow of the gas-liquid mixed liquid, a small amount of bubbles in the gas-liquid mixed liquid can be automatically broken and emerge, so that the content of gas in the gas-liquid mixed liquid is further reduced.
As shown in fig. 1, a liquid seal formed by the liquid separated from the gas-liquid mixture exists at the bottom of the tank 7. Since the liquid falling into the bottom of the tank 7 has a certain circumferential velocity, the liquid forming the liquid seal also has a certain circumferential flow. In addition, because the bottom of the tank body 7 is provided with the liquid discharge port 8, the fluid flows downwards through the liquid discharge port 8 to be discharged, spiral-shaped gravity sedimentation is formed in the process, and the fluid helps the gas contained in the liquid to move to a gas-liquid interface to overflow in the flowing process of the gravity sedimentation. The gas separated from the liquid in all the processes is discharged from the gas outlet port 6 at the top of the tank 7, and the discharge mode can be a pumping mode.
As shown in fig. 1, the pulse vibrator 10 is installed on the liquid guide plate 5, so that the space occupied by the tank body of the whole device can be effectively saved, and the timeliness of the gas-liquid mixed liquid receiving and separating vibration can be improved. For example, the pulse vibrator 10 may be mounted on the inclined portion 52 of the liquid guide plate 5. The pulse vibrator 10 applies pressure pulses, especially bubbles therein, to the gas-liquid mixed liquid, so that the bubbles which are not removed by the infrared emitter 9, the centrifugal mechanism and the plasma generator 3 are subjected to pulse vibration treatment, and further, micro bubbles still mixed in the gas-liquid mixed liquid rise and emerge. Meanwhile, the pulsed vibration applied by the pulsed vibrator 10 can also increase the flow rate of the gas-liquid mixed liquid on the liquid guide plate 5. The pulse vibrator 10 applies pressure pulse to the liquid discharge port 8 by controlling an electromagnetic brake switch of the pulse vibrator, the pressure pulse is realized by inflating and deflating, and the time interval between inflation and deflation is controlled between 0.1 second and 5.0 seconds. The pulse vibrator 10 is inflated and deflated for a period of time interval and has a pulse vibration frequency in the range of 0.1Hz to 5.0 Hz.
In all the processes, when the gas-liquid separation device performs gas-liquid separation, the inside of the tank 7 is preferably in a vacuum state, so that bubbles in gas-liquid mixed liquid can be more easily influenced by self pressure and emerge to the outside of the liquid from the inside of the liquid under the action of vacuum negative pressure in the tank 7, and the easiness of separating the bubbles from the liquid is greatly improved.
The gas-liquid separation method of the gas-liquid separation device in the present application may include the steps of:
the gas-liquid mixed liquid is input into the tank body 7 from the liquid inlet pipe 1.
The gas in the gas-liquid mixed liquid flowing through the liquid inlet pipe 1 is heated by the infrared emitter 9, so that the bubbles in the gas-liquid mixed liquid are fully vaporized. If the gas-liquid mixed liquid contains bubbles, the infrared heater emits high-intensity infrared rays with peak wavelength which is not Planck distribution to heat the gas in the gas-liquid mixed liquid, so that the bubbles in the gas-liquid mixed liquid are sufficiently vaporized by the high-intensity infrared rays at high temperature.
The liquid-liquid mixed liquid discharged from the outlet 12 of the liquid inlet pipe 1 is sprayed to the inner side wall of the impact tank 7 through a centrifugal mechanism. When the gas-liquid mixed liquid is sprayed to the periphery under the action of the rotating centrifugal force of the centrifugal impeller 2, bubbles in the gas-liquid mixed liquid can be separated to a certain degree, so that the content of the bubbles in the gas-liquid mixed liquid is reduced.
In the process that the gas-liquid mixed liquid is sprayed to the inner side wall of the tank body 7 by the centrifugal mechanism, the plasma generator 3 emits plasma flow after the centrifugal action of the centrifugal impeller 2, the plasma flow breaks separated bubbles to enable the bubbles to form gas to be discharged, and the plasma flow also breaks the bubbles in the gas-liquid mixed liquid which is not centrifuged. The plasma generator 3 and the centrifugal mechanism are matched with each other, so that the gas separation amount in the gas-liquid mixed liquid can be effectively increased on the whole, and the content of the gas in the gas-liquid mixed liquid is further reduced.
The gas-liquid mixture impacting on the inner side wall of the tank body 7 forms thin-layer turbulent flow along the inner side wall of the tank body 7 and the liquid guide plate 5 and falls into the bottom of the tank body 7 to form a liquid seal. In the process, the gas-liquid mixed liquid forms a thin-layer turbulent flow, and a certain circumferential speed is maintained to form spiral rotation during the process, and finally the liquid falls into the bottom of the tank body 7. In the process of thin-layer turbulent flow of the gas-liquid mixed liquid, a small amount of bubbles in the gas-liquid mixed liquid can be automatically broken and emerge, so that the content of gas in the gas-liquid mixed liquid is further reduced.
The pulse vibrator 10 applies pressure pulses to the gas-liquid mixed liquid in the tank 7, so that bubbles which are not broken by the centrifugal mechanism, the plasma generator 3 and the infrared emitter 9 are subjected to pulse vibration treatment, bubbles in the gas-liquid mixed liquid are burst and broken, and the flow rate of the gas-liquid mixed liquid is increased. The pulse vibrator 10 applies pressure pulse to the liquid discharge port 8 by controlling an electromagnetic brake switch of the pulse vibrator, the pressure pulse is realized by inflating and deflating, and the time interval between inflation and deflation is controlled between 0.1 second and 5.0 seconds. The pulse vibrator 10 is inflated and deflated for a period of time interval and has a pulse vibration frequency in the range of 0.1Hz to 5.0 Hz.
The liquid forming the liquid seal further separates out the gas in the liquid during gravity settling. Because the bottom of the tank body 7 is provided with the liquid discharge port 8, the liquid falling into the bottom of the tank body 7 has a certain circumferential speed, the fluid flows downwards through the liquid discharge port 8 to be discharged, spiral vortex-shaped gravity sedimentation is formed in the process, and the fluid is helpful for gas contained in the liquid to move to a gas-liquid interface to overflow in the flowing process of the gravity sedimentation.
The specific process steps of gas-liquid separation adopted by the application are as follows: the separation of the drilling fluid is realized by infrared heating vaporization, centrifugal action of a centrifugal impeller, plasma flow breaking and pulse vibration stirring. The medium can not need to propagate among the infrared heating vaporization process, consequently, can utilize the electromagnetic wave radiation to carry out preliminary high-efficient degasification, centrifugal impeller's centrifugation, plasma current is broken and is the physics refining effect and carry out the degasification work, centrifugal impeller of centrifuge utilizes liquid and gas after receiving the centrifugation, because the component is different and by further separation, plasma current is broken and is made further breakage to gas-liquid mixture flow by the plasma current that utilizes plasma emitter to launch, final pulse vibration stirring can be under the prerequisite of not destroying drilling fluid physical and chemical properties, gas and liquid separation in the drilling fluid, simultaneously can also accelerate the flow efficiency of drilling fluid.
This application adopts above technical scheme can have the following several advantages: 1. this application utilizes infrared emitter 9 to carry out heat treatment to the gas-liquid mixture that contains gas through infrared heating technique for the gas that contains in the gas-liquid mixture fully vaporizes. And the infrared has the characteristics of safety and stability, and the chemical properties of gas-liquid mixed liquid such as drilling fluid cannot be changed. 2. This application relies on the mode degasification that centrifugal mechanism and plasma generator 3 combined together for bubble in the gas-liquid mixture can the at utmost be broken. 3. The pulse vibrator 10 in the application effectively improves the efficiency of gas discharge and gas-liquid mixed liquid flow in the gas-liquid mixed liquid, and meets the requirement of safe and efficient drilling. 4. The whole gas-liquid separation device has a simple structure, is easy to install and replace, and has reproducible and generalizable effects.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A gas-liquid separation device, characterized by comprising:
the lower end of the tank body is provided with a liquid discharge port, and the upper end of the tank body is provided with an air outlet port;
a liquid inlet pipe extending into the tank body;
the infrared emitter is arranged on the liquid inlet pipe and used for heating gas in gas-liquid mixed liquid flowing through the liquid inlet pipe;
a centrifugal mechanism, comprising: the centrifugal impeller is connected to the driving shaft and arranged at an outlet of the liquid inlet pipe;
a plasma generator mounted on the drive shaft;
the liquid guide plate is arranged in the tank body, extends to the inner side wall of the tank body from the side wall of the liquid inlet pipe, and is used for receiving a gas-liquid mixed liquid sprayed out of the centrifugal impeller;
and the pulse vibrator is arranged on the liquid guide plate.
2. The gas-liquid separation device according to claim 1, wherein the outlet of the liquid inlet pipe faces generally upward.
3. The gas-liquid separation device of claim 1, wherein the pulse vibrator applies pressure pulses to the liquid discharge port by controlling an electromagnetic brake switch of the pulse vibrator, the pressure pulses are realized by inflating and deflating, and the time interval between inflation and deflation is controlled between 0.1 second and 5.0 seconds.
4. The gas-liquid separator according to claim 3, wherein the pulse vibrator is inflated and deflated for a period of time interval, and the pulse vibration frequency is in the range of 0.1Hz to 5.0 Hz.
5. The gas-liquid separation device according to claim 1, wherein the infrared heater emits high-intensity infrared light having a wavelength other than a peak wavelength of the planckian distribution to heat the gas in the gas-liquid mixture so as to sufficiently vaporize the bubbles in the gas-liquid mixture.
6. The gas-liquid separation device according to claim 1, wherein the liquid guide plate includes a horizontal portion adjacent to a liquid inlet pipe and an inclined portion adjacent to an inner side wall of the tank, the inclined portion extending upward from the liquid inlet pipe toward the inner side wall of the tank, and the pulse vibrator is mounted on the inclined portion of the liquid guide plate.
7. The gas-liquid separation device according to claim 1, wherein the outlet of the liquid inlet pipe has an outer edge extending in a radial direction of the liquid inlet pipe; the axial line of the centrifugal impeller is parallel to or on the same straight line with the axial line at the outlet of the liquid inlet pipe.
8. The gas-liquid separation device according to claim 1, wherein the centrifugal mechanism is configured to inject the liquid-liquid mixture discharged from the outlet of the liquid inlet pipe to impinge on an inner side wall of the tank.
9. The gas-liquid separator according to claim 1, wherein when the gas-liquid separator performs gas-liquid separation, the inside of the tank is in a vacuum state, and a liquid seal formed by a liquid separated from the gas-liquid mixture exists at the bottom of the tank.
10. A gas-liquid separation method using the gas-liquid separation device according to any one of claims 1 to 9, characterized by comprising the steps of:
inputting the gas-liquid mixed liquid into the tank body from the liquid inlet pipe;
heating the gas in the gas-liquid mixed liquid flowing through the liquid inlet pipe by an infrared emitter so as to fully vaporize bubbles in the gas-liquid mixed liquid;
ejecting the liquid-liquid mixed liquid discharged from the outlet of the liquid inlet pipe to impact the inner side wall of the tank body through a centrifugal mechanism;
in the process that the gas-liquid mixed liquid is sprayed to impact the inner side wall of the tank body by the centrifugal mechanism, the plasma generator emits a plasma flow after the centrifugal action of the centrifugal impeller, the plasma flow breaks separated bubbles to enable the bubbles to form gas to be discharged, and the plasma flow also breaks the bubbles in the gas-liquid mixed liquid which is not centrifuged;
the gas-liquid mixed liquid impacting on the inner side wall of the tank body forms thin-layer turbulent flow along the inner side wall of the tank body and the liquid guide plate and falls into the bottom of the tank body to form a liquid seal;
applying pressure pulses to the gas-liquid mixed liquid in the tank body through a pulse vibrator to enable bubbles which are not broken by the centrifugal mechanism, the plasma generator and the infrared emitter to be subjected to pulse vibration treatment, so that the bubbles in the gas-liquid mixed liquid are broken, and the flow rate of the gas-liquid mixed liquid is increased;
the liquid forming the liquid seal further separates out the gas in the liquid during gravity settling.
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| CN202010337364.4A CN111437631A (en) | 2020-04-26 | 2020-04-26 | Gas-liquid separation device and separation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209912A (en) * | 2021-05-26 | 2021-08-06 | 中国石油化工股份有限公司 | Up-flow fixed bed reactor and outlet collector thereof |
| CN115410443A (en) * | 2022-10-31 | 2022-11-29 | 西南石油大学 | Control system for blowout simulation training |
| CN117618989A (en) * | 2023-10-23 | 2024-03-01 | 山东明合地热能源开发有限公司 | Oil-gas-water three-phase separator |
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2020
- 2020-04-26 CN CN202010337364.4A patent/CN111437631A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209912A (en) * | 2021-05-26 | 2021-08-06 | 中国石油化工股份有限公司 | Up-flow fixed bed reactor and outlet collector thereof |
| CN115410443A (en) * | 2022-10-31 | 2022-11-29 | 西南石油大学 | Control system for blowout simulation training |
| CN117618989A (en) * | 2023-10-23 | 2024-03-01 | 山东明合地热能源开发有限公司 | Oil-gas-water three-phase separator |
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