CN215726146U - Moisture two-phase flow metering device - Google Patents
Moisture two-phase flow metering device Download PDFInfo
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Abstract
The application relates to the technical field of flow measurement, in particular to a moisture two-phase flow metering device, which comprises a pipeline comprising at least one arc-shaped section; a first pressure acquisition module installed in the arc section; the gas pressure acquisition module and the temperature acquisition module are arranged in the pipeline; the controller is used for receiving pressure values of the first pressure taking point and the second pressure taking point and outputting a first measurement pressure difference; receiving gas pressure and gas temperature, and outputting gas density; receiving the gas density and the first measured differential pressure and outputting a gas volumetric flow. Moisture makes centrifugal motion in the arc-shaped section, gas moves on the concave side of the arc-shaped section, liquid moves on the convex side of the arc-shaped section under the action of centrifugal force, gas-liquid separation is realized, a first measurement pressure difference of the concave side of the arc-shaped section is obtained at the moment of gas-liquid separation, the influence of the liquid on the first measurement pressure difference is effectively reduced, and the accuracy of the gas volume flow is improved conveniently; and is convenient to transport and install, thereby facilitating the improvement of applicability.
Description
Technical Field
The application relates to the technical field of flow measurement, in particular to a moisture two-phase flow metering device.
Background
In the oil recovery industry, a gas-liquid mixed fluid containing a liquid phase and a gas phase is often produced from an oil well, and is often referred to as "wet gas" in the industry, and the wet gas is essentially a gas-liquid two-phase flow fluid with a low liquid content. Wherein the gas phase comprises oilfield gas or any gas that is non-condensable at ambient temperature, such as methane, ethane, propane, butane, etc.; the liquid phase includes an oil phase as well as an aqueous phase, such as the crude oil itself, liquid additives dissolved in the crude oil during crude oil recovery, formation water, water injected into the well during oil recovery, and other liquid additives dissolved in the aqueous phase.
Moisture flow measurement is difficult relative to single phase fluids. Related moisture metering methods can be divided into two categories: one is to meter moisture using a conventional single phase gas meter. Since the moisture is a mixture of gas and liquid, the contained liquid can reduce the measurement precision of the single-item gas flowmeter, and the measurement result is inaccurate. And secondly, the moisture is sent into a two-phase separator, the separator separates the moisture into gas phase and liquid phase, the outlet of the gas-liquid separator is respectively provided with a gas flowmeter and a liquid flowmeter, and the liquid phase outlet is provided with a moisture meter to measure the oil-water ratio, so that the flow rates of the oil, the water and the gas are obtained. However, the system has large mass and volume, and the oil well is often in a remote area, so that the transportation and installation are inconvenient, and the construction difficulty is increased.
Therefore, these methods of measuring moisture have many disadvantages, which cause problems such as large error of gas flow rate and poor applicability.
SUMMERY OF THE UTILITY MODEL
In order to reduce the problems of large metering error and poor applicability, the application provides a moisture two-phase flow metering device.
The application provides a two-phase flow metering device of moisture, adopts following technical scheme:
a two-phase flow meter of moisture comprising:
a conduit comprising at least one arcuate segment for transporting moisture; the arc sections are pipelines with the same circle center;
the first pressure acquisition module is arranged in the arc-shaped section and used for measuring the pressure values of a first pressure taking point and a second pressure taking point in the arc-shaped section; the first pressure taking point and the second pressure taking point are both positioned on the inner concave side of the same arc-shaped section;
the gas pressure acquisition module is used for measuring the gas pressure in the pipeline, and the temperature acquisition module is used for acquiring the gas temperature in the pipeline;
the controller is respectively connected with the first pressure acquisition module, the gas pressure acquisition module and the temperature acquisition module, and is used for receiving the pressure values of the first pressure acquisition point and the second pressure acquisition point and outputting a first measurement pressure difference; receiving the gas pressure and the gas temperature, and outputting a gas density; receiving the gas density and the first measured differential pressure and outputting a gas volumetric flow.
Through adopting above-mentioned technical scheme, the centrifugal motion is done to the moisture in the segmental arc, and gas moves at the indent side of segmental arc, and liquid moves to the evagination side of segmental arc under the effect of centrifugal force, realizes gas-liquid separation. The first pressure acquisition module acquires a first measurement pressure difference of the concave side of the arc-shaped section at the moment of gas-liquid separation, so that the influence of liquid on the first measurement pressure difference is effectively reduced, and the accuracy of the gas volume flow is improved conveniently; and the occupied volume is small, and the transportation and the installation are convenient, so that the applicability is convenient to improve.
Optionally, the first pressure taking point is located at the most concave point of the concave side of the arc-shaped section, and the second pressure taking point is located at the concave side of the outlet end of the arc-shaped section; the most concave point is the middle point of the concave side of the arc-shaped section.
Through adopting above-mentioned technical scheme, when the centrifugal motion was done to the moisture in the segmental arc, reached best gas-liquid separation effect at the most concave point of segmental arc indent side, after the gas-liquid separation, because gaseous translation rate is faster, and gaseous side at the segmental arc moves, further reduces the liquid rate that contains in the gas to be convenient for improve first measurement pressure differential's measurement accuracy.
Optionally, the first pressure obtaining module includes:
the first differential pressure sensor is arranged at the first pressure taking point and the second pressure taking point and is used for detecting a first measurement differential pressure between the first pressure taking point and the second pressure taking point;
the controller is in communication with the first differential pressure sensor for receiving a first measured differential pressure.
Through adopting above-mentioned technical scheme, be convenient for acquire the first measurement pressure differential between first pressure taking point and the second pressure taking point through first differential pressure sensor to be convenient for improve the measurement accuracy of first measurement pressure differential.
Optionally, the first pressure obtaining module includes:
the first pressure sensor is arranged at the first pressure taking point and used for acquiring first pressure at the first pressure taking point;
the second pressure sensor is arranged at a second pressure taking point and is used for acquiring second pressure at the second pressure taking point;
the controller is in communication with the first pressure sensor and the second pressure sensor, respectively, and is configured to receive the first pressure and the second pressure and output a first measured differential pressure.
Through adopting above-mentioned technical scheme, be convenient for acquire the first measurement pressure differential between first pressure taking point and the second pressure taking point through first pressure sensor and second pressure sensor to be convenient for improve the measurement accuracy of first measurement pressure differential.
Optionally, the pipeline includes an input pipe, at least one arc-shaped section and an output pipe, an input end of the arc-shaped section is connected with the input pipe, and an output end of the arc-shaped section is connected with the output pipe;
the gas pressure acquisition module and the temperature acquisition module are respectively arranged in the output pipe and close to one side of the input pipe.
Through adopting above-mentioned technical scheme, the moisture removes to the output tube through the segmental arc behind gas-liquid separation, because gaseous speed is faster to remove in one side that the output tube is close to the input tube, through obtaining inboard gas pressure and gas temperature, effectively reduce the possibility that gas-liquid mixture influences measurement accuracy.
Optionally, the gas pressure obtaining module includes a gas pressure sensor, configured to obtain a gas pressure in the pipeline; the temperature acquisition module comprises a temperature sensor and is used for acquiring the temperature of the gas in the pipeline;
the controller is respectively communicated with the gas pressure sensor and the temperature sensor, and is used for receiving the gas pressure and the gas temperature and outputting the gas density.
Through adopting above-mentioned technical scheme, be convenient for gas pressure and gas temperature in the output tube according to gas pressure sensor and temperature sensor.
Optionally, the metering device further includes:
and the second pressure acquisition module is arranged in the same arc-shaped section and is used for measuring the pressure values of a first pressure taking point and a third pressure taking point in the arc-shaped section, and the third pressure taking point is positioned on the convex side of the arc-shaped section.
By adopting the technical scheme, because liquid moves towards the outer convex side in the arc-shaped section under the action of centrifugal force, the second measurement pressure difference between the inner concave side and the outer convex side in the arc-shaped section is obtained and is related to the flow velocity of gas and the liquid containing rate, so that the liquid containing rate is judged conveniently through the second measurement pressure difference and the first measurement pressure difference, and the correction of measurement errors is facilitated.
Optionally, the third pressure taking point is located at a most convex point of the outer convex side of the arc-shaped section, and the most convex point is a middle point of the outer convex side of the arc-shaped section.
By adopting the technical scheme, when the moisture does centrifugal motion in the arc-shaped section, the most salient point on the outer convex side of the arc-shaped section achieves the best gas-liquid separation effect, and more liquid is in the most salient point, so that the accuracy of the second measurement pressure difference is improved conveniently.
Optionally, the second pressure obtaining module includes:
the second differential pressure sensor is arranged at the first pressure taking point and the third pressure taking point and is used for detecting a second measurement differential pressure between the first pressure taking point and the third pressure taking point;
the controller is in communication with the second differential pressure sensor for receiving a second measured differential pressure.
Through adopting above-mentioned technical scheme, be convenient for obtain the second through second differential pressure sensor and measure differential pressure, help improving the accuracy of second measurement differential pressure.
Optionally, the second pressure obtaining module includes:
the first pressure sensor is arranged at the first pressure taking point and used for acquiring first pressure at the first pressure taking point;
the third pressure sensor is arranged at a third pressure taking point and is used for acquiring third pressure at the third pressure taking point;
the controller is in communication with the first pressure sensor and the third pressure sensor, respectively, and is configured to receive the first pressure and the third pressure and output a second measured differential pressure.
Through adopting above-mentioned technical scheme, be convenient for obtain the second through first pressure sensor and third pressure sensor and measure the pressure differential, help improving the accuracy of second measurement pressure differential.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the moisture makes centrifugal motion in the arc-shaped section, the gas moves on the concave side of the arc-shaped section, and the liquid moves on the convex side of the arc-shaped section under the action of centrifugal force, so that gas-liquid separation is realized; the first pressure acquisition module acquires a first measurement pressure difference of the concave side of the arc-shaped section at the moment of gas-liquid separation, so that the influence of liquid on the first measurement pressure difference is effectively reduced, and the accuracy of the gas volume flow is improved conveniently; the occupied volume is small, and the transportation and the installation are convenient, so that the applicability is improved conveniently;
2. when the moisture is at the segmental arc in-process centrifugal motion, reach the best gas-liquid separation effect at the most concave point of segmental arc indent side, after the gas-liquid separation, because gaseous translation rate is faster, and gaseous at the segmental arc's the side removal of indent, further reduce the liquid content rate in the gas to be convenient for improve first measurement pressure differential's measurement accuracy.
Drawings
FIG. 1 is a schematic diagram of a two-phase flow metering device according to one embodiment of the present application.
FIG. 2 is a block diagram of a two-phase flow metering device of the present application, one embodiment of which is shown.
FIG. 3 is another block diagram of a two-phase flow metering device of the present application, one embodiment of which is shown.
Fig. 4 is a compression factor graph according to an embodiment of the present application.
Description of reference numerals: 1. a pipeline; 11. an input tube; 12. an arc-shaped section; 13. an output pipe; 2. a first pressure point; 3. a second pressure point; 4. a third pressure tapping point; 5. a gas pressure acquisition module; 51. a gas pressure sensor; 6. a temperature acquisition module; 61. a temperature sensor; 7. a first pressure acquisition module; 71. a first differential pressure sensor; 72. a first pressure sensor; 73. a second pressure sensor; 8. a second pressure acquisition module; 81. a second differential pressure sensor; 82. a third pressure sensor; 9. and a controller.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The first embodiment is as follows:
the embodiment of the application discloses a moisture two-phase flow metering device. Referring to fig. 1, including a pipeline 1 including at least one arc segment 12, the pipeline 1 may be configured as a U-shaped pipeline 1, an Ω -shaped pipeline 1, or the like having the arc segment 12, and the arc segments 12 are pipelines with the same center, and may be configured as a major arc or a minor arc.
As an embodiment of the pipeline 1, the pipeline 1 comprises an input pipe 11, at least one arc segment 12 and an output pipe 13, wherein the input end of the arc segment 12 is connected to the input pipe 11, and the output end of the arc segment 12 is connected to the output pipe 13. Moisture flows into the input pipe 11, and when passing through the arc-shaped section 12, centrifugal motion is performed in the arc-shaped section 12, gas moves at the concave side of the arc-shaped section 12, liquid moves towards the convex side of the arc-shaped section 12 under the action of centrifugal force, gas-liquid separation is realized, and finally the moisture is discharged through the output pipe 13.
In addition, the pipeline 1 is at the in-process that uses, and the segmental arc 12 is the horizontality, effectively reduces the gravity influence of liquid in the flow in-process to be convenient for improve the gas-liquid separation effect of moisture in the segmental arc 12.
Referring to fig. 1 and 2, the metering device further includes a first pressure obtaining module 7 installed in the arc-shaped section 12, a gas pressure obtaining module 5 disposed in the output pipe 13, a temperature obtaining module 6 disposed in the output pipe 13, and a controller 9.
As an embodiment of the first pressure obtaining module 7, the first pressure obtaining module 7 includes a first differential pressure sensor 71 disposed at the first pressure taking point 2 and the second pressure taking point 3, and the first differential pressure sensor 71 is connected with the controller 9. The first pressure taking point 2 is located at the most concave point of the concave side of the arc-shaped section 12, the most concave point is the middle point of the concave side of the arc-shaped section 12, and the second pressure taking point 3 is located at the concave side of the outlet end of the same arc-shaped section 12.
The first differential pressure sensor 71 is configured to obtain a first measured differential pressure between the first pressure sampling point 2 and the second pressure sampling point 3, and send the first measured differential pressure to the controller 9.
As another embodiment of the first pressure acquisition module 7, referring to fig. 1 and 3, the first pressure acquisition module 7 includes a first pressure sensor 72 disposed at the first pressure taking point 2 and a second pressure sensor 73 disposed at the second pressure taking point 3, and the first pressure sensor 72 and the second pressure sensor 73 are respectively connected to the controller 9.
The first pressure sensor 72 is used for measuring a first pressure at the first pressure taking point 2 and sending the first pressure to the controller 9; the second pressure sensor 73 is used to measure the second pressure at the second pressure taking point 3 and send the second pressure to the controller 9. The controller 9 receives the first pressure and the second pressure, and calculates a difference between the first pressure and the second pressure to obtain a first measured differential pressure.
Referring to fig. 1 and 2, the gas pressure obtaining module 5 is provided as a gas pressure sensor 51, and the gas pressure sensor 51 is provided at one side of the output pipe 13 close to the input pipe 11 for obtaining the gas pressure and sending the gas pressure to the controller 9. The temperature obtaining module 6 is arranged as a temperature sensor 61, and the temperature sensor 61 is arranged on one side of the output pipe 13 close to the input pipe 11, and is used for obtaining the gas temperature and sending the gas temperature to the controller 9.
The controller 9 receives the gas pressure and the gas temperature and calculates the formula
Obtaining the volume of the gas, wherein n is the molar coefficient of the gas, T is the temperature of the gas, and P is the pressure of the gas; r is 8.314J mol-1·K-1Referred to as the molar gas constant.
According to the formula
Obtaining the molar volume of the gas according to the formula
The gas density is obtained, m being the molar mass of the gas. Since the main component in the moisture is natural gas, and the gas molar mass of the natural gas is 16 g/mol.
When the pressure is high, the ideal gas equation of state no longer applies. Under the working condition environment that the ideal gas state equation has deviation, a compression factor Z needs to be introduced as correction. Wherein the compression factor
Wherein Vm is trueTrue gas molar volume, Vm is, ideallyIs the ideal gas molar volume.
The gas pressure P in the pipe is obtained by the gas pressure sensor 51, and the gas temperature T in the pipe is obtained by the temperature sensor 61. According to the formula
Obtaining a comparative temperature TrWherein, TcIs the critical temperature, i.e. the maximum temperature allowed for the gas to liquefy; according to the formula
Obtaining a comparative temperature PrWherein P iscAt critical pressure, i.e. at TcUnder the condition of liquefying gasThe lowest pressure required. Using methane as an example, Tc＝-82.62℃，Pc＝4.596MPa。
According to T in conjunction with FIG. 4rAnd PrObtaining and T in a compression factor graphrAnd PrThe corresponding compression factor Z. According to the formula
Obtaining the real gas molar volume, and finally obtaining the gas molar volume according to a formula
The gas density is obtained, so that the gas density of the real gas is convenient, and the accuracy of the gas density is convenient to improve.
The controller 9 is based on the obtained gas density and the first measured pressure difference and according to the formula
Calculating the gas volume flow Q, wherein Δ P1 is the absolute value of the first measured differential pressure ρQi (Qi)For the gas density, k1 is the measurement coefficient, and k1 is related to the shape of the pipe 1 and the inner diameter of the pipe 1.
The implementation principle of the moisture two-phase flow metering device in the embodiment of the application is as follows:
moisture flows into the input pipe 11, and when passing through the arc-shaped section 12, centrifugal motion is performed in the arc-shaped section 12, gas moves at the concave side of the arc-shaped section 12, liquid moves towards the convex side of the arc-shaped section 12 under the action of centrifugal force, gas-liquid separation is realized, and finally the moisture is discharged through the output pipe 13.
At the moment of moisture gas-liquid separation, the first pressure obtaining module 7 obtains a first measured pressure difference of the concave side of the arc-shaped section 12, obtains the gas pressure and the gas temperature in the output pipe 13 through the gas pressure sensor 51 and the temperature sensor 61, and the controller 9 receives the gas pressure and the gas temperature to obtain the gas density and obtain the gas volume flow according to the first measured pressure difference and the gas density.
Example two:
the difference between this embodiment and the first embodiment is: referring to fig. 1 and 2, a second pressure acquisition module 8 is also included, mounted within the arcuate segment 12.
As an embodiment of the second pressure obtaining module 8, the second pressure obtaining module 8 includes a second differential pressure sensor 81 disposed at the first pressure taking point 2 and the third pressure taking point 4, the second differential pressure sensor 81 is connected with the controller 9; the third pressure taking point 4 is located at the most convex point of the convex side in the arc-shaped section 12, the most convex point is the middle point of the convex side of the arc-shaped section 12, and the most concave point of the same arc-shaped section 12 corresponds to the most convex point.
The second differential pressure sensor 81 is configured to obtain a second measured differential pressure between the first pressure sampling point 2 and the third pressure sampling point 4, and send the second measured differential pressure to the controller 9.
As another embodiment of the second pressure acquisition module 8, referring to fig. 1 and 3, the second pressure acquisition module 8 includes a third pressure sensor 82 disposed at the third pressure taking point 4, and the third pressure sensor 82 is connected to the controller 9.
The third pressure sensor 82 is used to measure a third pressure at the third pressure taking point 4 and send the third pressure to the controller 9. The controller 9 receives the first pressure and the third pressure, and calculates a difference between the first pressure and the second pressure to obtain a second measured differential pressure.
Gas moves within the concave side of the arcuate section 12 as liquid moves under centrifugal force to the convex side within the arcuate section 12. The first measured differential pressure is the pressure differential on the concave side of the arcuate segment 12 and is related to the flow rate of the gas; the second measurement pressure difference is the pressure difference between the concave side and the convex side of the arc-shaped section 12, and is related to the flow rate and the liquid content of the gas, that is, the second measurement pressure difference is positively related to the liquid content under the condition that the flow rate of the gas is constant.
The controller 9, after receiving the second measured differential pressure, is convenient to obtain the liquid content of the gas according to the second measured differential pressure and the first measured differential pressure. And obtaining the gas content of the moisture based on the liquid content of the moisture, and multiplying the gas volume flow obtained by the first measurement pressure difference by the gas content of the moisture to obtain the corrected gas volume flow, so that the accuracy of the gas volume flow is further improved.
It should be noted that, during the transportation of the moisture in the pipeline 1, a certain flow rate is provided, and if the flow rate is less than a preset threshold value, the liquid is not enough to be distributed on the outer convex side of the arc-shaped section 12 due to centrifugal action; if the flow rate is larger than the preset threshold value, the liquid forms a meniscus geometric distribution in the arc-shaped section 12 and is attached to the outer convex side of the arc-shaped section 12; wherein the liquid level at the contact of the liquid with the arcuate section 12 is curved, the curvature being referred to as the meniscus.
Ignoring the effect of gravity, the maximum thickness of the meniscus is at the third pressure taking point 4. The maximum thickness of the meniscus is measured with the meniscus formed where the liquid contacts the arcuate section 12 and the area of the meniscus is calculated, and the ratio of the cross-sectional liquid area, i.e. the liquid holdup, is derived based on the area of the meniscus.
As an embodiment of the method for obtaining the maximum thickness of the meniscus, in the pure gas state, the first measured pressure difference Δ P1 measured between the first pressure taking point 2 and the second pressure taking point 3 is a function of the gas volume flow Q, i.e. it is determined that the maximum thickness of the meniscus is a function of the gas volume flow Q
A second measured differential pressure Δ P2, measured between the first pressure sampling point 2 and the third pressure sampling point 4, is also functionally similar to the gas volume flow Q, i.e. it is functionally similar
Where k2 is the measurement coefficient and k2 is related to the shape of the pipe and the pipe inside diameter. Thus, it can be seen that
Then
In a wet state, the actual value of the differential pressure brought by the gas is Δ P2, and the measured value of the differential pressure brought by the liquid is obtained according to the formula Δ P3 ═ Δ P3+ Δ P2, wherein Δ P3 is brought by the liquidTo thereby obtain an actual value of the differential pressure
Since Δ P3 is obtained by the centrifugal force of the liquid in centrifugal motion, then
Wherein m is1The mass of the liquid, r the radius of curvature, v the linear velocity and s the pressure-taking area; the radius of curvature r is a geometric constraint of the arcuate segment 12 such that the radius of curvature r is known. And m is1＝V1×ρLiquid for treating urinary tract infectionV1 is the volume of the third pressure tapping fluid, ρLiquid for treating urinary tract infectionIs the liquid density.
By
To obtain
In the case where the difference in gas-liquid flow rate is ignored,
then
Wherein D is the arc section pipe diameter, and H is the liquid thickness, namely the maximum thickness of meniscus.
As an embodiment of the meniscus area obtaining method, the concave side and the convex side of the arc segment 12 are regarded as two staggered equal radius circles, where H is the center distance, and the area of the overlapping part of the two staggered equal radius circles is derived by a geometric formula, that is
The meniscus area Sm＝S1-Sd＝πR2-SdWherein R is a radius,
s1 is the area of the circle of equal radius.
As one embodiment of the liquid content obtaining method, according to the formula
The liquid content delta is obtained.
By the formula deltaQi (Qi)＝1-δLiquid for treating urinary tract infectionObtaining the gas content deltaQi (Qi)The gas volume flow obtained from the first measured pressure difference is multiplied by the moisture content to obtain a corrected gas volume flow Q2, i.e. the
In addition, a characteristic liquid volume flow Q3 can be obtained based on meniscus area and liquid velocity, ignoring gas-liquid flow velocity differences, i.e. the
Wherein S isdIs the area of the overlapping part of two circles with equal radius, and D is the pipe diameter of the arc-shaped section 12.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A two-phase flow meter of moisture, comprising:
a pipe (1) comprising at least one arcuate section (12) for transporting moisture; the arc sections (12) are pipelines with the same circle center;
the first pressure acquisition module (7) is installed in the arc-shaped section (12) and is used for measuring the pressure values of the first pressure taking point (2) and the second pressure taking point (3) in the arc-shaped section (12); the first pressure taking point (2) and the second pressure taking point (3) are both positioned on the inner concave side of the same arc-shaped section (12);
the gas temperature acquisition device comprises a gas pressure acquisition module (5) and a temperature acquisition module (6) which are installed in the pipeline (1), wherein the gas pressure acquisition module (5) is used for measuring the gas pressure in the pipeline (1), and the temperature acquisition module (6) is used for acquiring the gas temperature in the pipeline (1);
the controller (9) is respectively connected with the first pressure acquisition module (7), the gas pressure acquisition module (5) and the temperature acquisition module (6), and is used for receiving the pressure values of the first pressure taking point (2) and the second pressure taking point (3) and outputting a first measurement pressure difference; receiving the gas pressure and the gas temperature, and outputting a gas density; receiving the gas density and the first measured differential pressure and outputting a gas volumetric flow.
2. The two-phase flow meter of moisture according to claim 1, wherein: the first pressure taking point (2) is located at the most concave point of the concave side of the arc-shaped section (12), and the second pressure taking point (3) is located at the concave side of the outlet end of the arc-shaped section (12); the most concave point is the midpoint of the concave side of the arc-shaped section (12).
3. The two-phase flow metering device of moisture according to claim 1 or 2, characterized in that the first pressure obtaining module (7) comprises:
a first differential pressure sensor (71) arranged at the first pressure taking point (2) and the second pressure taking point (3) and used for detecting a first measurement pressure difference between the first pressure taking point (2) and the second pressure taking point (3);
the controller (9) is in communication with the first differential pressure sensor (71) for receiving a first measured differential pressure.
4. The two-phase flow metering device of moisture according to claim 1 or 2, characterized in that the first pressure obtaining module (7) comprises:
a first pressure sensor (72) arranged at the first pressure tapping point (2) for acquiring a first pressure at the first pressure tapping point (2);
a second pressure sensor (73) arranged at the second pressure taking point (3) for acquiring a second pressure at the second pressure taking point (3);
the controller (9) is in communication with the first pressure sensor (72) and the second pressure sensor (73), respectively, for receiving the first pressure and the second pressure, and outputting a first measured differential pressure.
5. The two-phase flow meter of moisture according to claim 1, wherein: the pipeline (1) comprises an input pipe (11), at least one arc-shaped section (12) and an output pipe (13), wherein the input end of the arc-shaped section (12) is connected with the input pipe (11), and the output end of the arc-shaped section (12) is connected with the output pipe (13);
the gas pressure acquisition module (5) and the temperature acquisition module (6) are respectively arranged in the output pipe (13) and are close to one side of the input pipe (11).
6. The two-phase flow metering device of moisture according to claim 1 or 5, characterized in that: the gas pressure acquisition module (5) comprises a gas pressure sensor (51) for acquiring the gas pressure in the pipeline (1); the temperature acquisition module (6) comprises a temperature sensor (61) for acquiring the temperature of the gas in the pipeline (1);
the controller (9) is in communication with a gas pressure sensor (51) and a temperature sensor (61), respectively, for receiving the gas pressure and the gas temperature, and outputting a gas density.
7. The two-phase flow metering device of claim 1, further comprising:
and the second pressure acquisition module (8) is arranged in the same arc-shaped section (12) and is used for measuring the pressure values of the first pressure taking point (2) and the third pressure taking point (4) in the arc-shaped section (12), and the third pressure taking point (4) is positioned on the outer convex side of the arc-shaped section (12).
8. The two-phase flow metering device of claim 7, wherein said third pressure tapping point (4) is located at the most convex point of the convex side of the arcuate segment (12), said most convex point being the midpoint of the convex side of the arcuate segment (12).
9. The two-phase flow metering device of claim 7 or 8, wherein: the second pressure acquisition module (8) comprises:
the second differential pressure sensor (81) is arranged at the first pressure taking point (2) and the third pressure taking point (4) and is used for detecting a second measurement differential pressure of the first pressure taking point (2) and the third pressure taking point (4);
the controller (9) is in communication with a second differential pressure sensor (81) for receiving a second measured differential pressure.
10. The two-phase flow metering device of claim 7 or 8, wherein: the second pressure acquisition module (8) comprises:
a first pressure sensor (72) arranged at the first pressure tapping point (2) for acquiring a first pressure at the first pressure tapping point (2);
a third pressure sensor (82) arranged at the third pressure tapping point (4) for acquiring a third pressure at the third pressure tapping point (4);
the controller (9) is in communication with the first pressure sensor (72) and the third pressure sensor (82), respectively, for receiving the first pressure and the third pressure, and outputting a second measured differential pressure.
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| CN202122035597.1U CN215726146U (en) | 2021-08-26 | 2021-08-26 | Moisture two-phase flow metering device |
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