CN114279888B - Pipeline gas content measuring method and device, storage medium and electronic equipment - Google Patents
Pipeline gas content measuring method and device, storage medium and electronic equipment Download PDFInfo
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Abstract
The application discloses a pipeline gas content measuring method, a device, a storage medium and electronic equipment, wherein if a fan or a compressor runs in a variable frequency mode, a second measured value of a measuring instrument for collecting gas pressure in a pipeline and a third measured value of the measuring instrument for collecting gas temperature in the pipeline are respectively obtained, and a first gas density is obtained through calculation; respectively acquiring the data and a first measured value of a measuring instrument for acquiring the gas differential pressure and/or flow in a pipeline and a fourth measured value of a measuring instrument for measuring the rotating speed of a fan or a compressor when the target interval duration is reached, and calculating a second gas density and a rare gas density to be measured; and measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured. The method completes measurement under the condition of not adding other detection instruments, and is simple; the measuring instrument has the advantages of quick response, convenient maintenance and low cost.
Description
Technical Field
The application relates to the technical field of gas measurement, in particular to a method and a device for measuring the gas content of a pipeline, a storage medium and electronic equipment.
Background
The aerodynamic properties of the air are changed when helium is mixed into the air, so that the helium content in the air needs to be measured. Current methods for detecting helium content in air mainly include gas chromatography, mass spectrometry, and the like. The gas chromatography and mass spectrometry have the characteristics of high accuracy and good sensitivity in measuring helium content, but detection equipment needs to be arranged independently, the response is slower, and the maintenance cost is higher in the use process.
Disclosure of Invention
In view of the above, the embodiment of the application provides a method and a device for measuring the gas content of a pipeline, a storage medium and electronic equipment, so as to solve the technical problems of slower response of detection equipment and higher maintenance cost in the use process in the prior art.
The technical scheme provided by the application is as follows:
the first aspect of the embodiment of the application provides a method for measuring the gas content of a pipeline, wherein a measuring instrument for measuring gas parameters is arranged in the pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, and filling gas in the pipeline is air which does not contain rare gas to be measured in an initial operation state of gas utilization equipment; the method for measuring the gas content of the pipeline comprises the following steps: if the fan or the compressor runs, respectively acquiring a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline and a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline; calculating a first gas density according to the second measured value and the third measured value; respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached; when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument and a flow measuring instrument, calculating a second gas density according to a gas differential pressure value collected by the gas differential pressure measuring instrument and a flow value collected by the flow measuring instrument; when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument or a flow measuring instrument, determining a proportion parameter according to the first measured value and the fourth measured value and calculating a second gas density according to the first measured value, the fourth measured value and the proportion parameter; determining the density of the rare gas to be measured mixed in the current pipeline according to the second measured value and the third measured value; and measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density.
Optionally, when the measuring meter for collecting the first measured value includes a gas differential pressure measuring meter and a flow measuring meter, the method further includes: if the fan or the compressor runs, respectively acquiring a gas differential pressure value acquired by the gas differential pressure measuring instrument and a flow value acquired by the flow measuring instrument; and calculating the first gas density according to the gas differential pressure value and the flow value.
Optionally, before the second measurement value of the measuring instrument for collecting the pressure of the gas in the pipeline and the third measurement value of the measuring instrument for collecting the temperature of the gas in the pipeline are respectively obtained when the fan or the compressor is in operation, the method further comprises: vacuumizing the pipeline and filling air which does not contain rare gas to be measured in the pipeline; the line filled with air not containing the noble gas to be measured is subjected to a continuous purge treatment.
Optionally, the calculating the first gas density according to the gas differential pressure value and the flow value includes: calculating a first gas density from the differential gas pressure value and the flow value according to the following formula:
wherein Δp 0 Representing a first measured value, q, of the differential pressure measuring instrument in an initial state v0 A first measurement value representing the flow meter in an initial state; a represents a variable: wherein the method comprises the steps ofC represents the outflow coefficient of the flow measuring instrument, and has no dimension; beta represents the diameter ratio, dimensionless; e represents the expansion coefficient, dimensionless; d represents the primary device orifice or throat diameter.
Optionally, when the fan or the compressor is operated in variable frequency, the determining a ratio parameter according to the first measurement value and the fourth measurement value and calculating a second gas density according to the first measurement value, the fourth measurement value and the ratio parameter when the measurement meter for collecting the first measurement value includes a gas differential pressure measurement meter or a flow measurement meter includes: when the measuring instrument is a differential pressure measuring instrument, the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period; c (C) 2 Representing the ratio parameter; n represents the fourth measurement value;
when the measuring instrument is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v A first measurement value representing the measurement of the flow meter after a target interval duration; c (C) 1 Representing the ratio parameter; n represents the fourth measurement value.
Optionally, if the fan or the compressor is in variable frequency fixed frequency operation, the measuring instrument used for collecting the first measured value is a gas differential pressure measuring instrument when the fan or the compressor is in variable frequency fixed frequency operation, and the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period;
when the measuring instrument used for collecting the first measured value is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v Representing a first measurement of the flow meter measured after a target interval duration.
Optionally, the measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density includes: calculating the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured by the following steps:
wherein ρ is 11 Representing the first gas density; ρ 2 Representing the second gas density; ρ 4 Representing the rare gas density to be measured.
The second aspect of the embodiment of the application provides a pipeline gas content measuring device, wherein a measuring instrument for measuring gas parameters is arranged in a pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, and filling gas in the pipeline is air which does not contain rare gas to be measured in an initial operation state of gas using equipment; the pipeline gas content measuring device comprises: the first acquisition module is used for respectively acquiring a second measured value of the measuring instrument for acquiring the gas pressure in the pipeline and a third measured value of the measuring instrument for acquiring the gas temperature in the pipeline when the fan or the compressor is in operation; the first calculation module is used for calculating the first gas density according to the second measured value and the third measured value; the second acquisition module is used for respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or the flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached; the second calculation module is used for calculating a second gas density according to the gas differential pressure value acquired by the gas differential pressure measuring instrument and the flow value acquired by the flow measuring instrument when the measuring instrument for acquiring the first measured value comprises the gas differential pressure measuring instrument and the flow measuring instrument; a third calculation module, configured to determine a ratio parameter according to the first measurement value and the fourth measurement value and calculate a second gas density according to the first measurement value, the fourth measurement value and the ratio parameter when the measurement meter for collecting the first measurement value includes a gas differential pressure measurement meter or a flow measurement meter; a fourth calculation module, configured to determine, according to the second measurement value and the third measurement value, a density of a rare gas to be measured mixed in the current pipeline; and the measurement module is used for measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured.
A third aspect of the embodiments of the present application provides a computer-readable storage medium storing computer instructions for causing a computer to perform the pipeline gas content measurement method according to any one of the first aspect and the first aspect of the embodiments of the present application.
A fourth aspect of an embodiment of the present application provides an electronic device, including: the pipeline gas content measuring device comprises a memory and a processor, wherein the memory and the processor are in communication connection, the memory stores computer instructions, and the processor executes the computer instructions so as to execute the pipeline gas content measuring method according to any one of the first aspect and the first aspect of the embodiment of the application.
The technical scheme provided by the application has the following effects:
according to the pipeline gas content measuring method provided by the embodiment of the application, the pipeline is provided with the measuring instrument for measuring the gas parameters, the measuring instrument is connected with the fan or the compressor in the pipeline, and the filling gas in the pipeline is air which does not contain the rare gas to be measured in the initial state of operation of gas using equipment; the method comprises the following steps: if the fan or the compressor runs, respectively acquiring a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline and a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline; calculating a first gas density according to the second measured value and the third measured value; respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached; when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument and a flow measuring instrument, calculating a second gas density according to a gas differential pressure value collected by the gas differential pressure measuring instrument and a flow value collected by the flow measuring instrument; when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument or a flow measuring instrument, determining a proportion parameter according to the first measured value and the fourth measured value and calculating a second gas density according to the first measured value, the fourth measured value and the proportion parameter; determining the density of the rare gas to be measured mixed in the current pipeline according to the second measured value and the third measured value; and measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density. The method can finish the measurement of the rare gas content in the air flow without adding other detection instruments, and is simple; the differential pressure and/or flow measuring instrument has the advantages of quick response, convenient maintenance and low cost.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a pipeline gas content measurement method according to an embodiment of the present application;
FIG. 2 is a flow chart of a method of measuring pipeline gas content according to an embodiment of the present application;
FIG. 3 is a block diagram of a pipeline gas content measurement apparatus according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a computer-readable storage medium provided according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The embodiment of the application provides a method for measuring the gas content of a pipeline, wherein a measuring instrument for measuring gas parameters is arranged in the pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, the filling gas in the pipeline is air which does not contain rare gas to be measured in the initial state of operation of gas utilization equipment, as shown in fig. 1, and 1 represents the compressor or the fan; 2 represents a gas utilization device; 3 represents a regulating valve; 4 represents a differential pressure meter or a flow meter; 5 represents a PLC or DCS; CP represents differential pressure or flow signal; p represents a gas pressure signal; t represents a gas temperature signal; n represents the rotational speed signal of the compressor or fan. In the embodiment of the application, helium is taken as an example for the rare gas to be measured; as shown in fig. 2, the method comprises the steps of:
step S101: and if the fan or the compressor runs, respectively acquiring a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline and a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline. Specifically, initial parameters including the gas pressure P (MPa) in the pipeline, i.e., the second measurement value, and the gas temperature T (c) in the pipeline, i.e., the third measurement value, need to be acquired first before starting the measurement.
Step S102: and calculating the first gas density according to the second measured value and the third measured value. Specifically, the first gas density is calculated according to the following formula according to the second measured value and the third measured value:
wherein P represents the gas pressure value in the pipeline, namely a second measured value; t represents the temperature T of the gas in the line, i.e. the third measurement.
Step S103: and respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached. Specifically, after the target interval period is reached, the acquisition parameters including the differential pressure Δp (Pa) or the flow rate q of the differential pressure measurement meter are repeatedly acquired v (m 3 And/h), the pressure P (MPa) of the gas in the pipeline, the temperature T (DEG C) of the gas in the pipeline and the rotating speed n (r/min) of the fan or the compressor. The embodiment of the application does not limit the target interval duration, and a person skilled in the art can determine the interval duration when helium is mixed into the pipeline system according to actual situations.
Step S104: when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument and a flow measuring instrument, calculating the second gas density according to the gas differential pressure value collected by the gas differential pressure measuring instrument and the flow value collected by the flow measuring instrument. Specifically, when the measuring instrument for collecting the first measured value includes a gas differential pressure measuring instrument and a flow measuring instrument, the second gas density is directly calculated according to the following formula according to the measured differential pressure value and flow value:
specifically, a represents a variable constant:wherein C represents the outflow coefficient of the flow measuring instrument, and has no dimension; beta represents the diameter ratio, dimensionless; e represents the expansion coefficient, dimensionless; d represents the primary device orifice or throat diameter; Δp represents a differential pressure value Δp (Pa); q v Representing the flow value q v (m 3 /h)。
Step S105: when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument or a flow measuring instrument, a proportion parameter is determined according to the first measured value and the fourth measured value, and a second gas density is calculated according to the first measured value, the fourth measured value and the proportion parameter. Specifically, when the measuring instrument used for collecting the first measured value is one of a differential pressure measuring instrument and a flow measuring instrument, the second gas density cannot be calculated according to the collected differential pressure value and flow value, and at this time, the ratio parameter of the first measured value and the fourth measured value is firstly determined, including the differential pressure Δp (Pa) or the flow q v (m 3 A/h) a ratio C of the rotational speed n (r/min) of the fan or compressor 1 Or C 2 。
Specifically, a plurality of rotating speed points N are uniformly taken in the full rotating speed range of the compressor or the fan (0-N, N is the maximum rotating speed of the compressor or the fan) 1 ,n 2 … …, N, and at the same time the differential pressure value Δp for each rotational speed is recorded in Table 1 1 ,Δp 2 ,……,Δp n Or the corresponding flow value q v1 ,q v2 ,……,q vn ：
TABLE 1
| Rotating speed n (r/min) | Differential pressure Δp/(Pa) | Flow q v (m 3 /h) |
| n 1 | Δp 1 | q v1 |
| n 2 | Δp 2 | q v2 |
| …… | …… | …… |
| N | Δp n | q vn |
It is then known from similar principles of fluid mechanics that:
Δp＝C 2 n 2 …………………………………(3)
q v ＝C 1 n…………………………………(4)
fitting the data acquired in table 1 by using a least square method to obtain a corresponding scaling factor C 1 Or C 2 。
The second gas density may then be calculated from the obtained first measurement, the fourth measurement and the scaling parameter.
Step S106: and determining the density of the rare gas to be measured mixed in the current pipeline according to the second measured value and the third measured value. Specifically, the rare gas density to be measured is calculated according to the following formula:
wherein P represents a second measurement value; t represents a third measurement value.
Step S107: and measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density.
The method for measuring the gas content of the pipeline provided by the embodiment of the application can finish the measurement of the rare gas content in the air flow without adding other detection instruments, and is simple; the differential pressure and/or flow measuring instrument has the advantages of quick response, convenient maintenance and low cost.
As an alternative implementation of the embodiment of the present application, when the measuring instrument used for collecting the first measured value includes a differential gas pressure measuring instrument and a flow measuring instrument, the method further includes: if the fan or the compressor runs, respectively acquiring a gas differential pressure value acquired by the gas differential pressure measuring instrument and a flow value acquired by the flow measuring instrument; and calculating the first gas density according to the gas differential pressure value and the flow value. Specifically, when the fan or compressor is running, the first gas density may also be calculated from the gas differential pressure value and the flow value. Firstly, measuring according to a measuring instrument to obtain a gas differential pressure value and a flow value, and then calculating according to the following formula:
wherein Δp 0 Representing the differenceFirst measured value, q, of pressure measuring instrument in initial state v0 A first measurement value representing the flow meter in an initial state; a represents a variable: wherein C represents the outflow coefficient of the flow measuring instrument, and has no dimension; beta represents the diameter ratio, dimensionless; e represents the expansion coefficient, dimensionless; d represents the primary device orifice or throat diameter.
As an optional implementation manner of the embodiment of the present application, before step S101, to determine that the initial state of the filling gas in the pipeline in the operation of the gas-using device is air that does not contain the rare gas to be measured, the method further includes: vacuumizing the pipeline and filling air which does not contain rare gas to be measured in the pipeline; the line filled with air not containing the noble gas to be measured is subjected to a continuous purge treatment.
Specifically, the pipeline is firstly vacuumized once, and air which does not contain rare gas to be measured is filled in the pipeline, wherein the final pressure of vacuumizing is as follows:
p vacuum ≤0.02p Forehead (forehead)
Wherein p is Vacuum Representing the final pressure of the pipeline vacuum; p is p Forehead (forehead) The rated operating pressure of the pipeline when the gas utilization equipment operates is represented;
the line air is then continuously purged with a preset air that does not contain the noble gas to be measured. Wherein, the continuous purge time should satisfy:
wherein t represents a continuous purge time; v represents the pipeline volume; q v purge Represents purge flow (m) 3 /h)。
As an optional implementation manner of the embodiment of the present application, when the fan or the compressor is operated at variable frequency, and the measuring instrument for collecting the first measured value includes a gas differential pressure measuring instrument or a flow measuring instrument, determining a proportion parameter according to the first measured value and the fourth measured value and calculating a second gas density according to the first measured value, the fourth measured value and the proportion parameter includes: when the measuring instrument is a differential pressure measuring instrument, the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period; c (C) 2 Representing the ratio parameter; n represents the fourth measurement value;
specifically, when the fan or compressor is operated at variable frequency and the meter is a differential pressure meter, the volumetric gas flow rate q in the pipeline v ＝C 1 n, substituting the flow rate into the formula (2) and combining the formula (3), it is possible to obtain:
meanwhile, according to formula (2), it is possible to obtain:
from the formulas (7) and (8), it is possible to obtain the second gas density as:
when the measuring instrument is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v A first measurement value representing the measurement of the flow meter after a target interval duration; c (C) 1 Representing the ratio parameter; n represents the fourth measurement value.
In particular, when the meter is a flow meter and the fan or compressor is operated at variable frequency, the gas volume flow q 'in the line' v ＝C 1 n, however, there is a possibility that the gas density becomes small due to the mixing of rare gas, the differential pressure measured by the flow meter becomes small, and the flow measurement q is caused v And the actual value q' v Inconsistent, namely:
q′ v ＝C 1 n
from the formulas (10) and (11), it is possible to obtain the second gas density as:
as an optional implementation manner of the embodiment of the present application, if the fan or the compressor is operated at a variable frequency and a fixed frequency, and the measuring instrument for collecting the first measured value includes a differential gas pressure measuring instrument or a flow measuring instrument, determining a proportion parameter according to the first measured value and the fourth measured value and calculating a second gas density according to the first measured value, the fourth measured value and the proportion parameter, further includes: when the measuring instrument is a differential pressure measuring instrument, the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period;
in particular, when the measuring instrument is a differential pressure measuring instrument and the blower or the compressor is operated at constant frequency, the volume flow of the gas in the pipeline is unchanged, i.e. q v ＝q v0 The second gas density can be obtained according to the formula (2) and the formula (6):
when the measuring instrument is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v Representing a first measurement of the flow meter measured after a target interval duration.
Specifically, when the meter is a flow meter and the blower or compressor is operated at a constant frequency, the volume flow of the gas in the pipeline is not changed, but since the mixing of the rare gas may occur to cause the gas density to become small, the differential pressure measured by the flow meter becomes small, resulting in the flow measurement value q v And the actual value q' v Inconsistent, namely:
q′ v ＝q v0
from the formulas (14) and (15), when the meter is a flow meter, the second gas density is:
as an optional implementation manner of the embodiment of the present application, the measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density includes: calculating the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured by the following steps:
wherein ρ is 11 Representing the first gas density; ρ 2 Representing the second gas density; ρ 4 Representing the rare gas density to be measured.
And then calculating the rare gas content in the pipeline according to the obtained first gas density, the second gas density and the rare gas density to be measured.
Specifically, when the measuring instrument is a differential pressure measuring instrument and the fan or the compressor is operated in variable frequency, the rare gas content in the pipeline under the condition can be obtained by substituting the formula (1), the formula (5) and the formula (9) into the formula (17):
when the measuring instrument is a flow pressure measuring instrument and the fan or the compressor is operated in a variable frequency mode, the formula (1), the formula (5) and the formula (12) are substituted into the formula (17), and the rare gas content in the pipeline under the condition can be obtained:
when the measuring instrument is a differential pressure measuring instrument and the fan or the compressor is operated at a constant frequency, the rare gas content in the pipeline under the condition can be obtained by substituting the formula (1), the formula (5) and the formula (13) into the formula (17):
when the measuring instrument is a flow pressure measuring instrument and the fan or the compressor is operated at a constant frequency, substituting the formula (1), the formula (5) and the formula (16) into the formula (17) can obtain the rare gas content in the pipeline under the condition:
the embodiment of the application also provides a device for measuring the gas content of the pipeline, as shown in fig. 3, wherein a measuring instrument for measuring the gas parameter is arranged in the pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, and the filling gas in the pipeline is air which does not contain the rare gas to be measured in the initial state of the operation of gas utilization equipment; the device comprises:
a first obtaining module 401, configured to obtain, when the fan or the compressor is running, a second measurement value of the measuring instrument for collecting the pressure of the gas in the pipeline and a third measurement value of the measuring instrument for collecting the temperature of the gas in the pipeline, respectively; for details, see the description of step S101 in the above method embodiment.
A first calculation module 402, configured to calculate a first gas density according to the second measurement value and the third measurement value; for details, see the description related to step S102 in the above method embodiment.
A second obtaining module 403, configured to obtain a first measurement value of a measuring instrument for collecting a differential pressure and/or a flow rate of gas in the pipeline, a second measurement value of a measuring instrument for collecting a pressure of gas in the pipeline, a third measurement value of a measuring instrument for collecting a temperature of gas in the pipeline, and a fourth measurement value of a measuring instrument for collecting a rotational speed of a fan or a compressor, respectively, when the target interval duration is reached; for details, see the description of step S103 in the above method embodiment.
A second calculation module 404, configured to calculate a second gas density according to a gas differential pressure value acquired by the gas differential pressure measurement instrument and a flow value acquired by the flow measurement instrument when the measurement instrument for acquiring the first measurement value includes the gas differential pressure measurement instrument and the flow measurement instrument; for details, see the description related to step S104 in the above method embodiment.
A third calculation module 405, configured to determine a ratio parameter according to the first measurement value and the fourth measurement value and calculate a second gas density according to the first measurement value, the fourth measurement value and the ratio parameter when the measurement meter for collecting the first measurement value includes a gas differential pressure measurement meter or a flow measurement meter; for details, see the description of step S105 in the above method embodiment.
A fourth calculation module 406, configured to determine, according to the second measurement value and the third measurement value, a density of the rare gas to be measured mixed in the current pipeline; for details, see the description of step S106 in the above method embodiment.
A measurement module 407, configured to measure the rare gas content in the pipeline according to the first gas density, the second gas density, and the to-be-measured rare gas density; for details, see the description of step S107 in the above method embodiment.
The pipeline gas content measuring device provided by the embodiment of the application can finish the measurement of the rare gas content in the air flow without adding other detecting instruments, and has a simple measuring method; the differential pressure and/or flow measuring instrument has the advantages of quick response, convenient maintenance and low cost.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes: the third acquisition module is used for respectively acquiring the gas differential pressure value acquired by the gas differential pressure measuring instrument and the flow value acquired by the flow measuring instrument if the fan or the compressor is operated; and a fifth calculation module for calculating a first gas density according to the gas differential pressure value and the flow value.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes: the first processing module is used for carrying out vacuumizing treatment on the pipeline and filling air which does not contain rare gas to be measured in the pipeline; and the second processing module is used for continuously purging the pipeline filled with the air which does not contain the rare gas to be measured.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes:
a sixth calculation module, configured to calculate a first gas density according to the following formula according to the gas differential pressure value and the flow value, including:
wherein Δp 0 Representing a first measured value, q, of the differential pressure measuring instrument in an initial state v0 A first measurement value representing the flow meter in an initial state; a represents a variable: wherein C represents the outflow coefficient of the flow measuring instrument, and has no dimension; beta represents the diameter ratio, dimensionless; e represents the expansion coefficient, dimensionless; d represents the primary device orifice or throat diameter.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes:
a seventh calculation module, configured to calculate, when the measurement instrument is a differential pressure measurement instrument, the second gas density according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period;
and an eighth calculation module, configured to calculate, when the measurement instrument is a flow measurement instrument, the second gas density according to the following formula:
wherein q is v A first measurement value representing the measurement of the flow meter after a target interval duration; c (C) 1 Representing the ratio parameter; n represents the fourth measurement value.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes:
the ninth calculation module is configured to calculate the second gas density according to the following formula if the measuring instrument used for collecting the first measured value is a gas differential pressure measuring instrument when the fan or the compressor is operated at variable frequency and fixed frequency:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period;
a tenth calculation module, configured to calculate, when the measuring instrument for collecting the first measured value is a flow measuring instrument, the second gas density according to the following formula:
wherein q is v Representing a first measurement of the flow meter measured after a target interval duration.
As an optional implementation manner of the embodiment of the present application, the apparatus further includes: the eleventh calculation module is configured to calculate the rare gas content in the pipeline according to the first gas density, the second gas density, and the rare gas density to be measured by the following formula:
wherein ρ is 11 Representing the first gas density; ρ 2 Representing the second gas density; ρ 4 Representing the rare gas density to be measured.
The functional description of the device for measuring the gas content in the pipeline provided by the embodiment of the application is detailed with reference to the description of the method for measuring the gas content in the pipeline in the embodiment.
The embodiment of the present application also provides a storage medium, as shown in fig. 4, on which a computer program 601 is stored, which when executed by a processor, implements the steps of the method for measuring the gas content in a pipeline in the above embodiment. The storage medium also stores audio and video stream data, characteristic frame data, interactive request signaling, encrypted data, preset data size and the like. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It will be appreciated by those skilled in the art that implementing all or part of the above-described embodiment method may be implemented by a computer program to instruct related hardware, where the program may be stored in a computer readable storage medium, and the program may include the above-described embodiment method when executed. Wherein the storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (RandomAccessMemory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), a Solid State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.
The embodiment of the present application further provides an electronic device, as shown in fig. 5, where the electronic device may include a processor 51 and a memory 52, where the processor 51 and the memory 52 may be connected by a bus or other means, and in fig. 5, the connection is exemplified by a bus.
The processor 51 may be a central processing unit (Central Processing Unit, CPU). The processor 51 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or combinations thereof.
The memory 52 serves as a non-transitory computer readable storage medium that may be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as corresponding program instructions/modules in embodiments of the present application. The processor 51 executes various functional applications of the processor and data processing, i.e., implements the pipeline gas content measurement method in the above-described method embodiments, by running non-transitory software programs, instructions, and modules stored in the memory 52.
The memory 52 may include a memory program area that may store an operating device, an application program required for at least one function, and a memory data area; the storage data area may store data created by the processor 51, etc. In addition, memory 52 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 52 may optionally include memory located remotely from processor 51, which may be connected to processor 51 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 52 and when executed by the processor 51 perform the pipeline gas content measurement method of the embodiment shown in fig. 1-2.
The specific details of the electronic device may be understood correspondingly with reference to the corresponding related descriptions and effects in the embodiments shown in fig. 1 to 2, which are not repeated here.
Although embodiments of the present application have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the application, and such modifications and variations fall within the scope of the application as defined by the appended claims.
Claims (10)
1. The method for measuring the gas content of the pipeline comprises the steps that a measuring instrument for measuring gas parameters is arranged in the pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, and filling gas in the pipeline is air which does not contain rare gas to be measured in an initial operation state of gas utilization equipment; the method is characterized by comprising the following steps of:
if the fan or the compressor runs, respectively acquiring a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline and a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline;
calculating a first gas density from the second measurement value, the third measurement value, the first gas density representing a density of air not containing a rare gas to be measured;
respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached;
when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument and a flow measuring instrument, calculating a second gas density according to the gas differential pressure value collected by the gas differential pressure measuring instrument and the flow value collected by the flow measuring instrument, wherein the second gas density represents the density of air containing rare gas to be measured after the operation target interval time;
when the measuring instrument used for collecting the first measured value comprises a gas differential pressure measuring instrument or a flow measuring instrument, determining a proportion parameter according to the first measured value and the fourth measured value and calculating a second gas density according to the first measured value, the fourth measured value and the proportion parameter;
determining the density of the rare gas to be measured mixed in the current pipeline according to the second measured value and the third measured value;
and measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the to-be-measured rare gas density.
2. The method of claim 1, wherein the meter for collecting the first measurement comprises a differential gas pressure meter and a flow meter, the method further comprising:
if the fan or the compressor runs, respectively acquiring a gas differential pressure value acquired by the gas differential pressure measuring instrument and a flow value acquired by the flow measuring instrument;
and calculating the first gas density according to the gas differential pressure value and the flow value.
3. The method of claim 1, wherein before the obtaining the second measurement value of the measuring instrument for collecting the pressure of the gas in the pipeline and the third measurement value of the measuring instrument for collecting the temperature of the gas in the pipeline, respectively, if the blower or the compressor is in operation, the method further comprises:
vacuumizing the pipeline and filling air which does not contain rare gas to be measured in the pipeline;
the line filled with air not containing the noble gas to be measured is subjected to a continuous purge treatment.
4. The method of claim 2, wherein said calculating a first gas density from said differential gas pressure value and said flow value comprises: calculating a first gas density from the differential gas pressure value and the flow value according to the following formula:
wherein Δp 0 Representing a first measured value, q, of the differential pressure measuring instrument in an initial state v0 A first measurement value representing the flow meter in an initial state; a represents a variable: wherein C represents the outflow coefficient of the flow measuring instrument, and has no dimension; beta represents the diameter ratio, dimensionless; e represents the expansion coefficient, dimensionless; d represents the primary device orifice or throat diameter.
5. The method of claim 4, wherein said determining a ratio parameter from said first measurement and said fourth measurement and calculating a second gas density from said first measurement, said fourth measurement and said ratio parameter if said fan or compressor is operating at variable frequency, said measuring means for collecting a first measurement comprises a differential gas pressure measuring means or a flow measuring means, comprises:
when the measuring instrument is a differential pressure measuring instrument, the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period; c (C) 2 Representing the ratio parameter; n represents the fourth measurement value;
when the measuring instrument is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v A first measurement value representing the measurement of the flow meter after a target interval duration; c (C) 1 Representing the ratio parameter; n represents the fourth measurement value.
6. The method of claim 4, wherein the measurement meter used to collect the first measurement value when the fan or compressor is operated at variable frequency and fixed frequency is a differential gas pressure measurement meter, and the second gas density is calculated according to the following formula:
wherein Δp represents a first measurement value measured by the differential pressure gauge after a target interval period;
when the measuring instrument used for collecting the first measured value is a flow measuring instrument, the second gas density is calculated according to the following formula:
wherein q is v Representing a first measurement of the flow meter measured after a target interval duration.
7. The method according to claim 1 or 2, wherein said measuring the rare gas content in the pipeline based on the first gas density, the second gas density and the rare gas density to be measured comprises:
calculating the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured by the following steps:
wherein ρ is 11 Representing the first gas density; ρ 2 Representing the second gas density; p is p 4 Representing the rare gas density to be measured.
8. A pipeline gas content measuring device, wherein a measuring instrument for measuring gas parameters is arranged in a pipeline, the measuring instrument is connected with a fan or a compressor in the pipeline, and filling gas in the pipeline is air which does not contain rare gas to be measured in an initial state of operation of gas utilization equipment; characterized by comprising the following steps:
the first acquisition module is used for respectively acquiring a second measured value of the measuring instrument for acquiring the gas pressure in the pipeline and a third measured value of the measuring instrument for acquiring the gas temperature in the pipeline when the fan or the compressor is in operation;
a first calculation module for calculating a first gas density representing a density of air not containing a rare gas to be measured from the second measurement value, the third measurement value;
the second acquisition module is used for respectively acquiring a first measured value of a measuring instrument for acquiring the differential pressure and/or the flow of the gas in the pipeline, a second measured value of the measuring instrument for acquiring the pressure of the gas in the pipeline, a third measured value of the measuring instrument for acquiring the temperature of the gas in the pipeline and a fourth measured value of the measuring instrument for acquiring the rotating speed of the fan or the compressor when the target interval duration is reached;
the second calculation module is used for calculating a second gas density according to the gas differential pressure value acquired by the gas differential pressure measuring instrument and the flow value acquired by the flow measuring instrument when the measuring instrument for acquiring the first measured value comprises the gas differential pressure measuring instrument and the flow measuring instrument, and the second gas density represents the density of the air containing the rare gas to be measured after the operation target interval duration;
a third calculation module, configured to determine a ratio parameter according to the first measurement value and the fourth measurement value and calculate a second gas density according to the first measurement value, the fourth measurement value and the ratio parameter when the measurement meter for collecting the first measurement value includes a gas differential pressure measurement meter or a flow measurement meter;
a fourth calculation module, configured to determine, according to the second measurement value and the third measurement value, a density of a rare gas to be measured mixed in the current pipeline;
and the measurement module is used for measuring the rare gas content in the pipeline according to the first gas density, the second gas density and the rare gas density to be measured.
9. A computer readable storage medium having stored thereon computer instructions for causing the computer to perform the pipeline gas content measurement method according to any one of claims 1-7.
10. An electronic device, comprising: a memory and a processor in communication with each other, the memory storing computer instructions, the processor executing the computer instructions to perform the pipeline gas content measurement method of any one of claims 1-7.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571500A (en) * | 2008-04-30 | 2009-11-04 | 刘庆杰 | Method and device for light hydrocarbon gas calorific-value on-line analysis |
| RU2445581C1 (en) * | 2010-08-24 | 2012-03-20 | Федеральное государственное унитарное предприятие федеральный научно-производственный центр "Научно-исследовательский институт измерительных систем им. Ю.Е. Седакова" | Method of fast determination of liquid phase volume content in gas-liquid flow and device to this end |
| CN103616313A (en) * | 2013-11-29 | 2014-03-05 | 齐增海 | On-line gas density measuring method |
| KR20140136308A (en) * | 2013-05-20 | 2014-11-28 | 주식회사 엔박 | a volume perceiving ilquid flow meter program and the ilquid flow rate measuring method |
| CN104792656A (en) * | 2015-03-17 | 2015-07-22 | 北京航天试验技术研究所 | Method and system for real-time measurement of parahydrogen content in liquid hydrogen |
| CN105091967A (en) * | 2015-08-13 | 2015-11-25 | 辽宁聚焦科技有限公司 | Method for measuring flow through pipeline or obstacle in pipeline |
| CN106731527A (en) * | 2016-12-12 | 2017-05-31 | 浙江大学 | The denitrogenation method and device of refinery hydrogen stream stock |
| CN109506729A (en) * | 2018-12-27 | 2019-03-22 | 西安安森智能仪器股份有限公司 | A kind of biphase gas and liquid flow parameter online test method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7654155B2 (en) * | 2006-09-19 | 2010-02-02 | Weatherford/Lamb, Inc. | Wet-gas flowmeter |
-
2021
- 2021-12-24 CN CN202111608424.2A patent/CN114279888B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571500A (en) * | 2008-04-30 | 2009-11-04 | 刘庆杰 | Method and device for light hydrocarbon gas calorific-value on-line analysis |
| RU2445581C1 (en) * | 2010-08-24 | 2012-03-20 | Федеральное государственное унитарное предприятие федеральный научно-производственный центр "Научно-исследовательский институт измерительных систем им. Ю.Е. Седакова" | Method of fast determination of liquid phase volume content in gas-liquid flow and device to this end |
| KR20140136308A (en) * | 2013-05-20 | 2014-11-28 | 주식회사 엔박 | a volume perceiving ilquid flow meter program and the ilquid flow rate measuring method |
| CN103616313A (en) * | 2013-11-29 | 2014-03-05 | 齐增海 | On-line gas density measuring method |
| CN104792656A (en) * | 2015-03-17 | 2015-07-22 | 北京航天试验技术研究所 | Method and system for real-time measurement of parahydrogen content in liquid hydrogen |
| CN105091967A (en) * | 2015-08-13 | 2015-11-25 | 辽宁聚焦科技有限公司 | Method for measuring flow through pipeline or obstacle in pipeline |
| CN106731527A (en) * | 2016-12-12 | 2017-05-31 | 浙江大学 | The denitrogenation method and device of refinery hydrogen stream stock |
| CN109506729A (en) * | 2018-12-27 | 2019-03-22 | 西安安森智能仪器股份有限公司 | A kind of biphase gas and liquid flow parameter online test method and device |
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