CN108534871A - A kind of energy measurement of natural gas checking system - Google Patents
A kind of energy measurement of natural gas checking system Download PDFInfo
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- CN108534871A CN108534871A CN201810430901.2A CN201810430901A CN108534871A CN 108534871 A CN108534871 A CN 108534871A CN 201810430901 A CN201810430901 A CN 201810430901A CN 108534871 A CN108534871 A CN 108534871A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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Abstract
The present invention relates to energy measurement of natural gas checking systems, including computing module, online gc, nitrogen gas tank, temperature transmitter and pressure transmitter, nitrogen gas tank is connected with online gc, online gc, temperature transmitter, pressure transmitter and live flowmeter are all connected with computing module, online gc is connected with the sample tap of natural-gas transfer pipeline the carbon content C to obtain natural gas and sends carbon content C to computing modules, temperature transmitter is used to measure the temperature T of the natural gas in natural-gas transfer pipeline and sends temperature T to computing modules, pressure transmitter is used to measure the pressure P of the natural gas in natural-gas transfer pipeline and sends pressure P to the computing modules.The chromatographic data of its online real time collecting and temperature, pressure data calculate the flow of natural gas and the theoretical velocity of sound, and are compared with the continuous data of live flowmeter, to examine the accuracy of live flowmeter, achieve the purpose that examine metering.
Description
Technical field
The invention belongs to metering test technical fields, are related to a kind of gas metering checking system, and in particular to Yi Zhongtian
Right gas energy meter checking system.
Background technology
Natural gas has a systems such as burning is complete, unit calorific value is high, combustion product has fewer environmental impacts as fuel
Row advantage, thus it is as a kind of important energy, the ratio in world's energy resource structure constantly rises.Natural gas is 21 century
The fastest-rising energy of consumption figure.Meanwhile with the fortune of building up and go into operation of one line of transfering natural gas from the west to the east, two wires and each interconnection
Battalion, China's natural gas transmission ＆ distribution network have stepped into a high-speed developing period.
In this context, the accuracy and fairness of gas metering are concerned.Currently, the metering side of natural gas
There are three types of formulas, that is, volume metering, mass metrology and energy meter.
As the natural gas of the energy, of people's attention is its calorific value, i.e. calorific value.So the volume of natural gas is not
Its value as the energy can really be embodied.In trade settlement, the mode measured by volume, which is not met, fixes the price according to the quality, is high-quality excellent
The commodity transaction principle of valence is unfavorable for scientifically and rationally utilizing limited natural gas resource, all unreasonable to both sides of supply and demand.
Energy meter due to reflection be natural gas thermal energy, as it is a kind of it is most reasonable, most scientific, can most reflect natural gas
A kind of metering method of the characteristics of as fuel, is widely adopted in the world.
By being changed into the progress and change of this metering method of energy meter from volume metering to natural gas, to improving state
The whole natural gas trade transaction of family is horizontal, keeps fair, just, reduces the dispute of trade transaction upstream and downstream user, creates stable
Harmonious social situation has very important realistic meaning.
Moreover, in order to realize the metering of natural gas, measuring equipment is equipped at various gas gathering and transportation stations.These meterings are set
Standby to pass through long-term use, measuring accuracy can reduce.Therefore, it periodically tests and is even more important to these measuring equipments.
It to test to measuring equipment, it is necessary to use verifying attachment.But existing verifying attachment generally existing inspection
The problems such as testing that precision is low, can not achieve energy meter.
In view of the above-mentioned technological deficiency of the prior art, there is an urgent need to develop a kind of novel energy measurement of natural gas inspection system
System.
Invention content
It is an object of the invention to overcome disadvantage existing in the prior art, a kind of energy measurement of natural gas inspection system is provided
System, can verify that the accuracy of live flowmeter, achieve the purpose that examine metering；Moreover, it can realize natural gas energy
Metering, meet the demand of Gas Exploitation energy meter.
To achieve the goals above, the present invention provides the following technical solutions：
A kind of energy measurement of natural gas checking system, which is characterized in that including computing module, online gc, nitrogen gas tank,
Temperature transmitter and pressure transmitter, wherein the nitrogen gas tank is connected with the online gc with for the online gc
Nitrogen is provided, the online gc, temperature transmitter, pressure transmitter and live flowmeter all with the computing module phase
Even, the online gc is connected the carbon content C to obtain natural gas and by the carbon with the sample tap of natural-gas transfer pipeline
Content C sends the computing module to, and the temperature transmitter is used to measure the temperature T of the natural gas in natural-gas transfer pipeline
And sending the temperature T to the computing modules, the pressure transmitter is natural in natural-gas transfer pipeline for measuring
The pressure P of gas simultaneously sends the pressure P to the computing modules, and the computing module is obtained according to the pressure P and temperature T
Theoretical velocity of sound v0 and the volume V that gas is calculated according to equation of gaseous state pV=nRT, that is, flow through the gas delivering pipe
The gas discharge in road, wherein p is the pressure of gas, can be calculated according to the cross-sectional area of pressure P and natural-gas transfer pipeline
It arrives；V is the volume of gas；N indicates the amount of gaseous matter；R is gas constant, meanwhile, the scene flowmeter is measured
To flow Q and velocity of sound v send the computing module to, the computing module is sentenced according to the difference of velocity of sound v and theoretical velocity of sound v0
Whether the disconnected live flowmeter normal, according to live flowmeter described in the multilevel iudge of the flow Q and volume V whether
Accurately.
Further, wherein the computing module calculates energy total amount also according to formula W=kCV, to realize natural gas
Energy meter, wherein W is energy total amount；K is coefficient, between 0.5~1.5；C is carbon content；V is gas volume, also
It is the gas discharge for flowing through the natural-gas transfer pipeline.
In addition, wherein the energy measurement of natural gas checking system further comprises that display module, the display module are used
In display velocity of sound v, theory velocity of sound v0, T volume V and flow Q and their comparison result.
Further, wherein the display module is additionally operable to show the energy total amount W.
Finally, wherein the energy measurement of natural gas checking system further comprises that power module, the power module are used
It powers in the computing module.
Compared with existing gas metering equipment test facility (ETF), energy measurement of natural gas checking system of the invention has
Following advantageous effects：
1, its can the chromatographic data of online real time collecting and temperature, pressure data, calculate natural gas flow and
The theoretical velocity of sound, and be compared with the continuous data of live flowmeter, to examine the accuracy of live flowmeter, reach inspection
The purpose of metering.
2, it can measure the energy total amount of natural gas, to realize energy meter, meet present energy measurement of natural gas
Demand.
Description of the drawings
Fig. 1 is the composition schematic diagram of the energy measurement of natural gas checking system of the present invention.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples, and the content of embodiment is not as the guarantor to the present invention
Protect the limitation of range.
Fig. 1 shows the composition schematic diagram of the energy measurement of natural gas checking system of the present invention.As shown in Figure 1, of the invention
Energy measurement of natural gas checking system include computing module, online gc, nitrogen gas tank, temperature transmitter and pressure inverting
Device.The online gc, temperature transmitter, pressure transmitter and live flowmeter are all connected with the computing module.
Wherein, nitrogen is stored in the nitrogen gas tank and is connected with the online gc by capillary with for it is described
Line chromatograph provides nitrogen, so that the online gc can work.
The online gc is connected the carbon content C to obtain natural gas and by institute with the sample tap of natural-gas transfer pipeline
It states carbon content C and sends the computing module to.Preferably, the online gc passes through capillary and the gas delivering pipe
The sample tap in road is connected to be sampled to the natural gas in the natural-gas transfer pipeline, to obtain the carbon content of natural gas
C。
The temperature transmitter is mounted on the natural-gas transfer pipeline, for measuring the day in natural-gas transfer pipeline
The temperature T of right gas simultaneously sends the temperature T to the computing modules.
The pressure transmitter is also mounted on the natural-gas transfer pipeline, for measuring in natural-gas transfer pipeline
The pressure P of natural gas simultaneously sends the pressure P to the computing modules.
Since the velocity of sound of natural gas is related with pressure P and temperature T and has corresponding table for inquiring, it is described
Computing module can the pressure P and temperature T obtain theoretical velocity of sound v0 using hair of tabling look-up.
Meanwhile the computing module can be according to equation of gaseous state pV=nRT, in known pressure P, natural-gas transfer pipeline
The volume V of gas is calculated in the case of cross-sectional area and temperature T, that is, flows through the gas stream of the natural-gas transfer pipeline
Amount.Wherein, p is the pressure of gas, can be calculated according to the cross-sectional area of pressure P and natural-gas transfer pipeline；V is gas
Volume；N indicates the amount of gaseous matter；R is gas constant.
Meanwhile live flowmeter being installed on natural-gas transfer pipeline.The scene flowmeter is for realizing the day
The daily measurement of the flow in right letter shoot road.Preferably, the live flowmeter is ultrasonic flowmeter.In this way, described existing
Field flow gauge can measure to obtain the flow Q and velocity of sound v of the natural gas in natural-gas transfer pipeline.And by the flow Q harmony
Fast V sends the computing module to.
In this way, the computing module can judge that the live flowmeter is according to the difference of velocity of sound v and theoretical velocity of sound v0
It is no normal, and can live flowmeter described in the multilevel iudge according to the flow Q with the volume V it is whether accurate, thus
The accuracy for examining live flowmeter achievees the purpose that examine metering.
Moreover, in the present invention, the computing module calculates energy total amount also according to formula W=kCV, it is natural to realize
The energy meter of gas.Wherein, W is energy total amount；K is coefficient, between 0.5~1.5；C is carbon content；V is gas volume,
Exactly flow through the gas discharge of the natural-gas transfer pipeline.In this way, the energy measurement of natural gas checking system energy of the present invention
The energy total amount of enough metering natural gases meets the demand of present energy measurement of natural gas to realize energy meter.
In addition, in the present invention, as illustrated in fig. 1, it is preferred that the energy measurement of natural gas checking system further comprises
Display module.The display module is used to show velocity of sound v, theoretical velocity of sound v0, volume V and flow Q and their comparison result,
So that inspection result is more than you know.
It is highly preferred that the display module is additionally operable to show the energy total amount W, in this way, natural convenient for knowing clearly
The energy content of gas.
Finally, in the present invention, as shown in Figure 1, the energy measurement of natural gas checking system further comprises power supply mould
Block.The power module is used to power to the computing module.In this way so that energy measurement of natural gas system of the invention is not having
Having in the case of having external power supply can use, and expand its use scope.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
Embodiment restriction.For those of ordinary skill in the art, it can also make on the basis of the above description
Other various forms of variations or variation.Here all embodiments can not be exhaustive.Every skill for belonging to the present invention
Row of the obvious changes or variations that art scheme is extended out still in protection scope of the present invention.
Claims (6)
1. a kind of energy measurement of natural gas checking system, which is characterized in that including computing module, online gc, nitrogen gas tank, temperature
Spend transmitter and pressure transmitter, wherein the nitrogen gas tank is connected with the online gc to be carried for the online gc
For nitrogen, the online gc, temperature transmitter, pressure transmitter and live flowmeter are all connected with the computing module,
The online gc is connected the carbon content C to obtain natural gas and by the carbon content with the sample tap of natural-gas transfer pipeline
C sends the computing module to, and the temperature transmitter is used to measure the temperature T of the natural gas in natural-gas transfer pipeline and will
The temperature T sends the computing module to, and the pressure transmitter is used to measure the natural gas in natural-gas transfer pipeline
Pressure P simultaneously sends the pressure P to the computing modules, and the computing module obtains theory according to the pressure P and temperature T
Velocity of sound v0 and the volume V that gas is calculated according to equation of gaseous state pV=nRT, that is, flow through the natural-gas transfer pipeline
Gas discharge, wherein p is the pressure of gas, can be calculated according to the cross-sectional area of pressure P and natural-gas transfer pipeline；V
For the volume of gas；N indicates the amount of gaseous matter；R is gas constant, meanwhile, what the scene flowmeter measurement obtained
Flow Q and velocity of sound v sends the computing module to, and the computing module judges institute according to the difference of velocity of sound v and theoretical velocity of sound v0
State whether live flowmeter is normal, whether live flowmeter described in the multilevel iudge according to the flow Q with the volume V is accurate
Really.
2. energy measurement of natural gas checking system according to claim 1, which is characterized in that the computing module also according to
Formula W=kCV calculates energy total amount, to realize the energy meter of natural gas, wherein W is energy total amount；K is coefficient,
Between 0.5~1.5；C is carbon content；V is gas volume, that is, flows through the gas discharge of the natural-gas transfer pipeline.
3. energy measurement of natural gas checking system according to claim 2, which is characterized in that further comprise showing mould
Block, the display module is for showing velocity of sound v, theory velocity of sound v0, T volume V and flow Q and their comparison result.
4. energy measurement of natural gas checking system according to claim 3, which is characterized in that the display module is additionally operable to
Show the energy total amount W.
5. the energy measurement of natural gas checking system according to any one of claim 1-4, which is characterized in that further packet
Power module is included, the power module is used to power to the computing module.
6. energy measurement of natural gas checking system according to claim 5, which is characterized in that the online flow is calculated as surpassing
Acoustic wave flow meter.
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| CN201810430901.2A CN108534871A (en) | 2018-05-08 | 2018-05-08 | A kind of energy measurement of natural gas checking system |
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| CN201810430901.2A CN108534871A (en) | 2018-05-08 | 2018-05-08 | A kind of energy measurement of natural gas checking system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112946167A (en) * | 2021-02-04 | 2021-06-11 | 成都秦川物联网科技股份有限公司 | Energy metering perception control method and system based on chromatography and ultrasonic waves |
| CN113551744A (en) * | 2021-08-10 | 2021-10-26 | 中国石油大学(北京) | Ultrasonic flowmeter performance online monitoring method and system |
| US20220163502A1 (en) * | 2021-02-04 | 2022-05-26 | Chengdu Qinchuan Iot Technology Co., Ltd. | Method and system for measuring energy of natural gas |
| CN114777011A (en) * | 2022-04-20 | 2022-07-22 | 中国石油化工股份有限公司 | Multifunctional fair metering system and metering method based on LNG tank car |
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|---|---|---|---|---|
| CN112946167A (en) * | 2021-02-04 | 2021-06-11 | 成都秦川物联网科技股份有限公司 | Energy metering perception control method and system based on chromatography and ultrasonic waves |
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| CN113551744A (en) * | 2021-08-10 | 2021-10-26 | 中国石油大学(北京) | Ultrasonic flowmeter performance online monitoring method and system |
| CN114777011A (en) * | 2022-04-20 | 2022-07-22 | 中国石油化工股份有限公司 | Multifunctional fair metering system and metering method based on LNG tank car |
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