CN114018368A - Oil-water interface instrument calibrating device - Google Patents
Oil-water interface instrument calibrating device Download PDFInfo
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- CN114018368A CN114018368A CN202111451265.XA CN202111451265A CN114018368A CN 114018368 A CN114018368 A CN 114018368A CN 202111451265 A CN202111451265 A CN 202111451265A CN 114018368 A CN114018368 A CN 114018368A
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Abstract
The invention discloses an oil-water interface instrument calibration device which comprises a simulation tank body, wherein the simulation tank body is provided with an observation window and a sampling window; the sampling window comprises a guide rail and a screw rod mechanism, a magnetic grid ruler is arranged in the guide rail, a sliding block is arranged along the guide rail, the reading device and an indicating arrow are fixed by the sliding block, and the indicating arrow points to the observation window; the screw rod mechanism comprises a spiral screw rod and a driving mechanism, the sliding block is provided with a sliding sleeve matched with the spiral screw rod, and the driving mechanism drives the screw rod mechanism to rotate so as to drive the sliding block to move in the vertical direction along the guide rail; a sampling port which is positioned at the same horizontal position with the indicating arrow is arranged on the sliding block to realize same-layer sampling; the simulation tank body is provided with a laminar flow sampling pipe, and the laminar flow sampling pipe extends into the simulation tank body and is parallel to the observation window. And determining the height of the liquid level according to the scales of the observation window and the indication value of the magnetic grid ruler, directly tracing to the length measurement standard, and comparing the display result of the calibrated oil-water interface instrument with the calibration value read by the magnetic grid ruler so as to correct the calibration value.
Description
Technical Field
The invention relates to an oil-water interface instrument calibrating device.
Background
Crude oil produced from underground contains a large amount of water and a small amount of impurities, and is mostly in an emulsified state. When the crude oil is subjected to oil-water separation in a specific dehydration device, the emulsification state of the crude oil is broken, and an oil phase is arranged below an upper water phase to form an oil-water interface. In the production process, the position of an oil-water interface in the dehydration equipment needs to be accurately detected and automatic control needs to be realized, so that the water content of the dehydrated crude oil meets the process requirement of a refinery (the water content is lower than 0.5%). The detection and control of the oil-water interface are very important, and if the oil-water interface cannot be well controlled, the water content exceeds the standard, and accidents such as tower flushing of a refinery are easily caused.
In the actual application of oil fields, the accuracy of interface detection is often influenced by the physical properties, chemical properties and working environment of a medium. The oil-water interface is usually a mixed liquid state in the form of water-in-oil and water-in-oil, and due to the influence of factors such as temperature, viscosity, electric field intensity and the like, the states of different dehydration effect interfaces present oil-water fusion transition zones with different thicknesses and water content unevenness. The complex characteristic of the interface transition zone increases the difficulty of interface detection, and the quality of the detection control of the interface directly determines whether the water content of the dehydrated crude oil exceeds the standard or not and whether the water content and the oil content of the water discharged from the bottom of the container exceed the standard or not. Therefore, an ideal interface detection instrument is selected, an oil-water interface is accurately detected, automatic control is realized, and the important significance is realized on ensuring the dehydration effect, so that the tower flushing accident caused by overhigh water content of the raw material can be avoided, the utilization rate of the raw material can be improved, the product yield is improved, and the environmental pollution is reduced.
At present, the oil-water interface instruments are more in types and have larger performance difference. According to the measurement principle, the oil-water interface instrument can be roughly divided into: magnetic, radio frequency admittance type, short wave absorption type, capacitance type, servo type, etc. These oil-water interface instruments have advantages and disadvantages, and need to be selected according to actual conditions. With the improvement of the automation degree and the appearance of an automation station and an unmanned station, the intelligent instrument becomes a main development direction. However, due to the importance of oil-water interface instruments in crude oil production, attention is still paid. In consideration of the fact that an instrument with high measurement precision and strong anti-interference capability is extremely needed on site, particularly in the aspect of oil-water interface monitoring of a separator, in order to ensure the fairness of oil product trade, the measurement result of the oil-water interface instrument needs to be accurate and reliable, and the existing oil-water interface instrument needs to be accurately calibrated.
Disclosure of Invention
The invention aims to provide a calibration device for an oil-water interface instrument, aiming at various oil-water interface instruments.
The purpose of the invention is realized by the following technical scheme:
an oil-water interface instrument calibration device comprises a simulation tank body 1, wherein the simulation tank body 1 is provided with an observation window 2 and a sampling window 3; the sampling window 3 comprises a guide rail 4 and a screw rod mechanism, a magnetic grid ruler is arranged in the guide rail 4, a sliding block 5 is arranged along the guide rail 4, a reading device and an indication arrow 6 are fixed by the sliding block 5, and the indication arrow 6 points to the observation window 2; the screw rod mechanism comprises a spiral screw rod 7 and a driving mechanism 8 for driving the screw rod mechanism 7 to rotate, a sliding sleeve matched with the spiral screw rod 7 is arranged on the sliding block 5, and the driving mechanism 8 drives the screw rod mechanism 7 to rotate so as to drive the sliding block 5 to move in the vertical direction along the guide rail; a sampling port 9 which is positioned at the same horizontal position with the indicating arrow is arranged on the sliding block 5, and a sample injector enters the simulation tank body through the sampling port to realize same-layer sampling; the simulation tank body 1 is provided with a laminar flow sampling pipe 10, the laminar flow sampling pipe 10 extends into the simulation tank body 1 and is parallel to the observation window 2, the outlet end of the laminar flow sampling pipe 10 is provided with a flow guide cover 12, the lower end of the edge of the flow guide cover 12 extends out of the laminar flow sampling pipe 10, and a gap is reserved between the lower end of the flow guide cover 12 and the bottom end of the laminar flow sampling pipe 10 to ensure that liquid flows out; the air guide sleeve 12 is provided with a height adjusting device for adjusting the size of a gap between the lower end of the air guide sleeve 12 and the bottom end of the laminar flow sampling tube 10.
Preferably, the bottom of the simulation tank body 1 is provided with a support leg. The bottom of the simulation tank body 1 is provided with a liquid outlet pipe, and a liquid discharge valve is arranged on the liquid outlet pipe. The top of the simulation tank body 1 is provided with a sample inlet for adding oil-water liquid or extending into the laminar flow sample adding pipe 10 or putting into an oil-water interface instrument.
Preferably, the observation window 2 is a transparent visual window, and the material of the observation window 2 is transparent glass.
Preferably, the observation window 2 is provided with a scale.
Preferably, the sliding sleeve is fixed at the left end of the sliding block 5; the sliding sleeve is provided with an internal thread which is matched with an external thread of the screw rod.
Preferably, the sliding block 5 is provided with a locking handle 11, one end of the locking handle 11 extends into the guide rail 4 and contacts with the sliding block 5, and a slotted hole is formed in the side surface of the guide rail 4 to enable the locking handle to move up and down along the sliding block 5; locking handle 11 one end that stretches into guide rail 4 be equipped with the screw thread, slider 5 correspond locking handle 11 and be equipped with the screw hole, thereby drive lead screw mechanism 7 by actuating mechanism 8 and rotate and drive slider 5 and remove to the directional oil-water interface of instruction arrow point 6 along the guide rail, close actuating mechanism 8, rotatory locking handle 11 fixes slider 5.
Preferably, the sampling port 9 is a tapered hole, and the aperture of the tapered hole is reduced from outside to inside to make the tapered hole horn-shaped, so that the micro-sampler can be conveniently inserted into the sampling port for sampling. If the oil-water interface is not obvious and can not be observed through the observation window directly, the sampling and the setting value can be obtained through the sampling port.
Preferably, the sampling window is provided with an anti-leakage component, and the anti-leakage component is composed of 2 layers of soft material layers and comprises an inner soft material layer and an outer soft material layer; the inner soft material layer and the outer soft material layer are respectively fixed by spacers.
The inner soft material layer and the outer soft material layer are made of silica gel, rubber and the like. The spacer is a flange.
Preferably, the guide rail 4, the screw rod mechanism and the slide block 5 are positioned outside the anti-leakage component, and the position of the sampling port 9 avoids the screw rod mechanism, the guide rail and the magnetic grid ruler.
By arranging the anti-leakage component, when the microsyringe enters the simulation tank body for sampling by pricking the sampling port, the reserved hole is not easy to leak. When the number of times of puncturing holes by the soft material is more and the soft material needs to be replaced, the original characteristics can be recovered by replacing the outer soft material layer under the condition of not discharging liquid in the storage tank.
Preferably, the air guide sleeve 12 is a circular truncated cone with an arc-shaped side surface, the cross section of the air guide sleeve 12 is in a pi shape, and the outer part of the air guide sleeve 12 extending out of the laminar flow sampling tube 10 is in a horizontal shape, so that liquid flows into the simulation tank body in a laminar flow state.
Preferably, the height adjusting device comprises a fixing screw 13 and a fixing frame 14 for fixing the screw 13; the fixing frame 14 comprises at least 3 inclined fixing rods for fixing the top ends of the fixing screws 13 on the tube wall of the laminar flow sampling tube 10; the lower end of the fixing screw 13 penetrates through a horizontal circular plate at the top end of the air guide sleeve 12 and is screwed by a nut.
Preferably, the fixing rods 16 are uniformly distributed along the inner wall of the laminar flow sampling tube 10.
When the oil-water interface instrument calibration device is used for calibrating an oil-water interface instrument, oil-water mixed liquid is filled in a simulation tank body 1, after the liquid state in the simulation tank body is stable, the calibrated oil-water interface instrument is placed in the simulation tank body, the oil-water interface is observed and judged through a transparent observation window 2, the liquid level height is determined according to the scale (used for pre-reading) of the observation window and the indicating value (used as final data) of a magnetic grid ruler, so that the measurement is more direct, the source is directly traced to the length measurement standard, the display result of the calibrated oil-water interface instrument is compared with the calibrated value read by the magnetic grid ruler, and the calibrated oil-water interface instrument is corrected to achieve the due accuracy, is slightly influenced by the external environment and excludes other interference factors. The calibration device for the oil-water interface instrument is not only suitable for the condition with a clear interface, but also suitable for the condition with a continuous over-emulsification layer in the middle by preparing an emulsion layer, samples are taken through a sampling port, the water content is accurately measured by using a Karl Fischer moisture meter to finish the judgment of the oil-water interface layer, and the complex condition of incomplete oil-water layering of enterprises is reproduced; the exact location of a particular moisture level in the emulsion layer may even be determined as required by the enterprise.
Aiming at a special emulsion layer (a transition layer between oil and water), the direct addition is easy to generate larger stirring, and longer time is needed for re-dispersion and stabilization. According to the invention, by designing the laminar flow sampling pipe, after an oil layer and a water layer are added, the laminar flow sampling pipe extends into the laminar flow sampling pipe from the top sampling port, the oil-water interface is detected to be fixed, emulsified liquid is pumped in and then discharged through the guide cover, and the emulsified liquid can be stably dispersed between oil and water to quickly reach a stable state.
Drawings
FIG. 1 is a schematic structural diagram of an oil-water interface instrument calibration device according to the present invention.
FIG. 2 is a schematic view of the installation of the slide block, the screw rod and the guide rail in the calibrating device for the oil-water interface instrument of the present invention.
FIG. 3 is a schematic view of the installation of a locking handle in the calibrating apparatus for an oil-water interface meter of the present invention.
FIG. 4 is a schematic view of the installation of the diversion cover at the outlet end of the laminar flow sampling tube in the calibrating apparatus for an oil-water interface meter according to the present invention.
FIG. 5 is a schematic structural diagram of a dome in an oil-water interface calibration apparatus according to the present invention.
FIG. 6 is a schematic structural diagram of a fixing frame in the calibrating apparatus for an oil-water interface instrument of the present invention.
In the figure, 1-a simulation tank body, 2-an observation window, 3-a sampling window, 4-a guide rail, 5-a slide block, 6-an indication arrow, 7-a spiral screw rod, 8-a driving mechanism, 9-a sampling port, 10-a laminar flow sample adding pipe, 11-a locking handle, 12-a flow guide cover, 13-a fixed screw, 14-a fixed frame, 15-a sample inlet and 16-a fixed rod.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Example 1
As shown in fig. 1-6, an oil-water interface instrument calibration device comprises a simulation tank body 1, wherein the simulation tank body 1 is provided with an observation window 2 and a sampling window 3; the sampling window 3 comprises an anti-leakage component, the anti-leakage component is composed of 2 layers of soft material layers and comprises an inner soft material layer and an outer soft material layer; a guide rail 4 and a screw rod mechanism are arranged on the outer side of the anti-seepage part, a magnetic grid ruler is arranged in the guide rail 4, a sliding block 5 is arranged along the guide rail 4, a reading device and an indicating arrow 6 are fixed by the sliding block 5, the indicating arrow 6 points to the observation window 2, and the reading device reads data of the magnetic grid ruler to give a display value; the screw rod mechanism comprises a spiral screw rod 7 and a driving mechanism 8 for driving the screw rod mechanism 7 to rotate, a sliding sleeve matched with the spiral screw rod 7 is arranged at the left end of the sliding block 5, and the driving mechanism 8 drives the screw rod mechanism 7 to rotate so as to drive the sliding block 5 to move in the vertical direction along the guide rail; a sampling port 9 which is positioned at the same horizontal position with the indicating arrow is arranged on the sliding block 5, and a sample injector enters the simulation tank body through the sampling port to realize same-layer sampling; the simulation tank body 1 is provided with a laminar flow sampling pipe 10, and the laminar flow sampling pipe 10 extends into the simulation tank body 1 and is parallel to the observation window 2; the outlet end of the laminar flow sampling pipe 10 is provided with a flow guide cover 12, the flow guide cover 12 is a circular truncated cone with an arc-shaped side surface, the lower end of the edge of the flow guide cover 12 extends out of the laminar flow sampling pipe 10, a gap is reserved between the lower end of the flow guide cover 12 and the bottom end of the laminar flow sampling pipe 10, and the part of the flow guide cover 12 extending out of the laminar flow sampling pipe 10 is horizontal; the air guide sleeve 12 is provided with a height adjusting device for adjusting the size of a gap between the lower end of the air guide sleeve 12 and the bottom end of the laminar flow sampling tube 10; the height adjusting device comprises a fixing screw 13 and a fixing frame 14 for fixing the screw 13, wherein the fixing frame 14 comprises 3 inclined fixing rods 17 for fixing the top end of the fixing screw 13 on the pipe wall of the laminar flow sampling pipe 10, and the lower end of the fixing screw 13 penetrates through a horizontal circular plate at the top end of the air guide sleeve 12 and is screwed by a nut.
The bottom of the simulation tank body 1 is provided with support legs. The top of the simulation tank body 1 is provided with a sample inlet for adding oil-water liquid or extending into the laminar flow sample adding pipe 10 or putting into an oil-water interface instrument.
The observation window 2 is a transparent visual window, and the material of the observation window 2 is transparent glass; the observation window 2 is provided with scales.
The sliding block 5 is provided with a locking handle 11, one end of the locking handle 11 extends into the guide rail 4 and is contacted with the sliding block 5, and the side surface of the guide rail 4 is provided with a slotted hole to enable the locking handle to move up and down along the sliding block 5; locking handle 11 one end that stretches into guide rail 4 be equipped with the screw thread, slider 5 correspond locking handle 11 and be equipped with the screw hole, thereby drive lead screw mechanism 7 by actuating mechanism 8 and rotate and drive slider 5 and remove to the directional oil-water interface of instruction arrow point 6 along the guide rail, close actuating mechanism 8, rotatory locking handle 11 fixes slider 5.
The sliding sleeve is provided with an internal thread which is matched with an external thread of the screw rod.
The inner soft material layer and the outer soft material layer are made of silica gel. The inner soft material layer and the outer soft material layer are fixed by flanges respectively.
The fixing rods 16 are uniformly distributed along the inner wall of the laminar flow sampling tube 10. The viewing window may be prepared by: a groove hole is formed in the vertical direction of the simulation tank body 1, and transparent glass is embedded in the groove hole and fixed through a flange. The sampling window can be prepared by the following method: a groove hole is formed along the vertical direction of the simulation tank body 1, an inner soft material layer and an outer soft material layer are respectively arranged corresponding to the groove hole, and the inner soft material layer and the outer soft material layer are respectively fixed by a spacer so as to form an anti-seepage part; the outer side of the anti-seepage part is provided with a guide rail 4, a screw rod mechanism, a slide block 5 and other parts.
Generally, the observation window 2 and the sampling window 3 are parallel to each other; the indicated arrow 6 may be maintained in line with the curvature of the simulated tank.
The skilled person can assemble the guide rail, magnetic scale, slider, reading device as described based on common general knowledge in the art.
When using this embodiment oil water interface appearance calibrating device calibration oil water interface appearance, at the internal oil water mixture that installs of simulation jar, treat the internal liquid state stabilization back of simulation jar, will be calibrated oil water interface appearance and put into the simulation jar body, observe through transparent observation window 2 and judge oil water interface, combine the indicating value of magnetic grid chi to confirm liquid level height according to observation window's scale, make the measurement more direct, directly trace back to the length measurement standard, will be calibrated the display result of oil water interface appearance and the calibration value that the magnetic grid chi read and compare, thereby revise it, make it reach due degree of accuracy, it is very little influenced by external environment, get rid of other interference factor. The calibration device for the oil-water interface instrument is not only suitable for the condition with a clear interface, but also suitable for the condition with a continuous over-emulsification layer in the middle by preparing an emulsion layer, samples are taken through a sampling port, the water content is accurately measured by using a Karl Fischer moisture meter to finish the judgment of the oil-water interface layer, and the complex condition of incomplete oil-water layering of enterprises is reproduced; the exact location of a particular moisture level in the emulsion layer may even be determined as required by the enterprise.
By designing the laminar flow sample adding pipe, after an oil layer and a water layer are added, the laminar flow sample adding pipe extends into the top sample inlet, the oil-water interface is fixed when the sample is detected, emulsified liquid is pumped in and then discharged through the guide sleeve, and the emulsified liquid can be stably dispersed between oil and water to quickly reach a stable state.
And through setting up antiseep part, after microsyringe got into the simulation jar body sample through pricking the sample connection, the difficult seepage in hole that stays. When the number of times of puncturing holes by the soft material is more and the soft material needs to be replaced, the original characteristics can be recovered by replacing the outer soft material layer under the condition of not discharging liquid in the storage tank.
Claims (10)
1. The utility model provides an oil water interface appearance calibrating device which characterized in that: the device comprises a simulation tank body (1), wherein the simulation tank body (1) is provided with an observation window (2) and a sampling window (3); the sampling window (3) comprises a guide rail (4) and a screw rod mechanism, a magnetic grid ruler is arranged in the guide rail (4), a sliding block (5) is arranged along the guide rail (4), the reading device and an indication arrow (6) are fixed by the sliding block (5), and the indication arrow (6) points to the observation window (2); the screw rod mechanism comprises a screw rod (7) and a driving mechanism (8) for driving the screw rod mechanism to rotate, the sliding block (5) is provided with a sliding sleeve matched with the screw rod (7), and the driving mechanism (8) drives the screw rod mechanism (7) to rotate so as to drive the sliding block (5) to move in the vertical direction along the guide rail; a sampling port (9) which is positioned at the same horizontal position as the indicating arrow is arranged on the sliding block (5), and a sample injector enters the simulation tank body through the sampling port to realize same-layer sampling; the simulation tank body (1) is provided with a laminar flow sampling pipe (10), and the laminar flow sampling pipe (10) extends into the simulation tank body (1) and is parallel to the observation window (2).
2. The oil-water interface instrument calibration device according to claim 1, wherein: the top of the simulation tank body (1) is provided with a sample inlet for adding oil-water liquid or extending into a laminar flow sample adding pipe or an oil-water interface instrument.
3. The oil-water interface instrument calibration device according to claim 1, wherein: the observation window (2) is a transparent visual window; the observation window (2) is provided with scales.
4. The oil-water interface instrument calibration device according to claim 1, wherein: the sliding block (5) is provided with a locking handle (11), one end of the locking handle (11) extends into the guide rail (4) and is contacted with the sliding block (5), and the side surface of the guide rail (4) is provided with a slotted hole to enable the locking handle to move up and down along the sliding block (5); locking handle (11) stretch into the one end of guide rail (4) and be equipped with the screw thread, slider (5) correspond locking handle (11) and be equipped with the screw hole, thereby move to the directional oil water interface of instruction arrow point (6) along the guide rail by actuating mechanism (8) drive screw rod mechanism (7) and rotate and drive slider (5), close actuating mechanism (8), rotatory locking handle (11) fix slider (5).
5. The oil-water interface instrument calibration device according to claim 1, wherein: the sampling port (9) is a tapered hole, and the aperture of the tapered hole is reduced from outside to inside.
6. The oil-water interface instrument calibration device according to claim 1, wherein: the sampling window is provided with an anti-leakage component, the anti-leakage component is composed of 2 layers of soft material layers and comprises an inner soft material layer and an outer soft material layer; the inner soft material layer and the outer soft material layer are respectively fixed by spacers.
7. The oil-water interface instrument calibration device according to claim 1, wherein: the guide rail (4), the screw rod mechanism and the sliding block (5) are positioned outside the anti-leakage component.
8. The oil-water interface instrument calibration device according to claim 1, wherein: the outlet end of the laminar flow sampling pipe (10) is provided with a flow guide cover (12), the lower end of the edge of the flow guide cover (12) extends out of the laminar flow sampling pipe (10), and a gap is reserved between the lower end of the flow guide cover (12) and the bottom end of the laminar flow sampling pipe (10).
9. The oil-water interface instrument calibration device according to claim 8, wherein: the air guide sleeve (12) is a circular truncated cone with an arc-shaped side surface, and the outer part of the air guide sleeve (12) extending out of the laminar flow sampling tube (10) is horizontal.
10. The oil-water interface instrument calibration device according to claim 1, wherein: the air guide sleeve (12) is provided with a height adjusting device for adjusting the size of a gap between the lower end of the air guide sleeve (12) and the bottom end of the laminar flow sampling pipe (10); the height adjusting device comprises a fixing screw (13) and a fixing frame (14) for fixing the screw (13); the fixing frame (14) comprises at least 3 inclined fixing rods for fixing the top ends of the fixing screws (13) on the pipe wall of the laminar flow sampling pipe (10); the lower end of the fixing screw (13) penetrates through a circular plate at the top end of the air guide sleeve (12) and is screwed by a nut.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111451265.XA CN114018368A (en) | 2021-12-01 | 2021-12-01 | Oil-water interface instrument calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111451265.XA CN114018368A (en) | 2021-12-01 | 2021-12-01 | Oil-water interface instrument calibrating device |
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| CN114018368A true CN114018368A (en) | 2022-02-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116160721A (en) * | 2023-02-03 | 2023-05-26 | 武汉理工大学 | Rocket nozzle preparation system |
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2021
- 2021-12-01 CN CN202111451265.XA patent/CN114018368A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116160721A (en) * | 2023-02-03 | 2023-05-26 | 武汉理工大学 | Rocket nozzle preparation system |
| CN116160721B (en) * | 2023-02-03 | 2024-05-14 | 武汉理工大学 | Rocket nozzle preparation system |
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