CN206440358U - Natural gas flowmeter verification system based on electric-heating technology - Google Patents
Natural gas flowmeter verification system based on electric-heating technology Download PDFInfo
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- CN206440358U CN206440358U CN201720090461.1U CN201720090461U CN206440358U CN 206440358 U CN206440358 U CN 206440358U CN 201720090461 U CN201720090461 U CN 201720090461U CN 206440358 U CN206440358 U CN 206440358U
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Abstract
The utility model discloses a kind of natural gas flowmeter verification system based on electric-heating technology, it is characterized in that, filter separator, lowering and stabilizing blood pressure module, turbine flowmeter and flow control valve are sequentially provided with the natural-gas transfer pipeline of the natural gas flowmeter verification system, electric heating control module is provided between the filter separator, lowering and stabilizing blood pressure module, flowmeter to be detected is arranged between turbine flowmeter, flow control valve.By being provided with electric heating control module between the filter separator, lowering and stabilizing blood pressure module, trip temperature heating is entered to calibrating natural gas using electric heating control module, so as to avoid the problem of natural gas separates out the damage of liquid, influence verification result, or even noise device in decompression verification process；And the electric heating control module is arranged on before lowering and stabilizing blood pressure module, it is to use first to heat the regulative mode being depressured afterwards to natural gas therefore, further avoids producing the problem of ice is stifled during decompression.
Description
Technical field
The utility model is related to natural gas flowmeter Calibration Technology field, and in particular to a kind of day based on electric-heating technology
Right air-flow gauge verification system.
Background technology
Natural gas is as a kind of clean energy, with good economic benefit and social benefit, in world's energy resource structure
In ratio constantly rise.With the fast development of gas industry, natural gas flowmeter and its species for Trade Measures
Day by day increase.The accuracy of gas metering is for ensureing natural gas science, fair measurement, the rights and interests for safeguarding production-supply-marketing tripartite etc.
Aspect has great importance.To improve the degree of accuracy of gas metering, main industrialized country builds up in succession in the world
Gas discharge calibrating installation with high accuracy level, and establish corresponding gas discharge magnitude tracing system or biography
Delivery system.
Natural gas due to inflammable, explosive, compressible, multicomponent, it is flowable the features such as, make its metering have following features：
(1) security is the primary constraints of gas metering；
(2) metering value is difficult reproduction；
(3) change of component can cause the physical property such as relative density, caloric value, compressibility factor, isentropic index, critical flow
Metric results are had a direct impact by the change of parameter；
(4) mounting condition such as the upstream pipe fitting of flowmeter, front and rear straight length, rectifier and temperature, pressure, vibrations, arteries and veins
The operating conditions such as dynamic, electromagnetic interference and environmental condition can have a direct impact to metric results；
(5) gas metering includes " matter " and " amount " two aspects, and both are interrelated, it is necessary to assure gas discharge
Metering and analysis two aspects of test are respectively provided with good traceability.
The volume flow metering equipment that domestic long-distance transport pipes are used mainly has ultrasonic flowmeter, standard orifice flow meter, whirlpool
Flowmeters, small user uses intelligent vortex precession flowmeter and rotz flowmeter mostly.Since 2000, with Shan capital
Line, " West-east Gas, " sending in river gas east ", loyal military line, Shan capital multiple line, the construction of isometric defeated natural duct, natural gas Trade Measures
Middle nominal diameter 100mm and the above bore pipe natural gas metering employ ultrasonic flowmeter, and its use ratio exceedes
60%, remaining has then mainly used turbine flowmeter and orifice flowmeter etc..Sichuan-chongqing Region gas distributing system is due to the operation time limit
Long, source of the gas is extremely complex, and makings belongs to greatly 2 grades of makings specified in China GB/T17820, and therefore, Trade Measures are mainly adopted
With orifice flowmeter, small part mini gas measuring station has used turbine flowmeter, vortex precession flowmeter and waist in turn
Gauge.In recent years, ultrasound is progressively carried out in the improvement with makings and the deep understanding to ultrasonic flowmeter, Chongqing of Sichuan gas area
Flowmeter is used as verification flowmeter, energy meter as the main metering instrument at A, B grades of gas metering stations equipped with orifice flowmeter
Auxiliary facility is in gradual perfection.It can be seen that, turn into China's high pressure, the main flow of a large amount of gas meterings in ultrasonic flowmeter
Meter.
The metering method of natural gas mainly has volume metering and energy meter two ways.Principle based on high quality and favourable price,
Energy meter is a kind of more rational metering method, is also the current current international practice and most fair Trade Measures method.By
In China, energy meter is started late, and online and offline chromatographic uncertainty can only be up to 1%, the higher heat of the degree of accuracy
Meter is still among development, and caloric value is directly determined and complete chain of tracing to the source not yet is set up in gas chromatographic analysis, it is impossible to full
Sufficient GB/T 18603 is to accuracy requirement as defined in A grades of stations.Still state carries out natural gas handing-over trade using energy meter method
It is also not universal, only China National Offshore Oil Corporation convey to Hong Kong Zhonghua Electrical Co., Ltd. at present natural gas and extensively
East, Fujian LNG projects have used energy meter handing-over.
It can be seen from literature search and Field Research, domestic main metering method is volume metering, gauge table station at present
Mainly volume instrument is examined and determine, such as national Large flow station Chengdu substation, Nanjing substation, and the developed country master such as America and Europe
Use energy meter mode.
The national oil natural gas Large flow station Wuhan simple standard set-up of substation HPPP methods is introduced by Germany, simple mark
Standard apparatus requires very strict to calibrating gas source temperature, it is desirable to examine and determine gas source temperature for 20 DEG C, and requires in nominal data collection
During, in gas temperature undulated control 10 minutes fluctuation range in ± 0.5 DEG C, in 1 hour fluctuation range in ± 1 DEG C,
And winter, spring solar term source temperature can not meet simple standard set-up to calibrating gas source temperature requirement, in addition, in order to improve simple mark
The compound linear of standard apparatus, simple standard set-up verification test in the case where German Pigsar carries out 1.9MPa and 5.0MPa pressure, in force
The Chinese carries out verification test under 5.0MPa and mains pressure, with the uniformity being combined under same pressure.But from natural gas is autonomous
Mains pressure reducing pressure by regulating flow will form temperature drop to 5.0MPa, and gas source temperature can not meet simple calibrating installation to calibrating source of the gas
Temperature requirement.
Utility model content
In view of this, the utility model offer one kind enters trip temperature heating to calibrating natural gas, and can avoid natural
The gas discharge for the problem of gas separates out the damage of liquid, influence verification result, or even noise device in decompression verification process
Count verification system.
In order to solve the above-mentioned technical problem, the utility model uses following technical scheme：
A kind of natural gas flowmeter verification system based on electric-heating technology, the day of the natural gas flowmeter verification system
Filter separator, lowering and stabilizing blood pressure module, turbine flowmeter and flow control valve, the mistake are sequentially provided with right letter shoot road
Filter and electric heating control module is provided between separator, lowering and stabilizing blood pressure module, flowmeter to be detected is arranged on turbine flowmeter, flow
Between regulating valve.
It is preferred that, the natural-gas transfer pipeline branches into detection branch between lowering and stabilizing blood pressure module, turbine flowmeter
And bypass branch, the detection branch is provided with turbine flowmeter, flowmeter to be detected and flow control valve, the bypass branch
Road is provided with flow bypass valve.
It is preferred that, the heating element heater of the electric heating control module is tube type electric-heating element.
Natural gas flowmeter verification system described in the utility model based on electric-heating technology, it passes through in the filtering point
From electric heating control module is provided between device, lowering and stabilizing blood pressure module, calibrating is carried out with natural gas using electric heating control module
Temperature is heated, so as to avoid natural gas from separating out liquid in decompression verification process, influences verification result, in addition noise device damage
Bad the problem of；It is to use first to heat to natural gas therefore and the electric heating control module is arranged on before lowering and stabilizing blood pressure module
The regulative mode being depressured afterwards, further avoids producing the problem of ice is stifled during decompression.
Brief description of the drawings
Fig. 1 is the module frame chart of the natural gas flowmeter verification system described in the utility model based on electric-heating technology.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
As shown in figure 1, the utility model provides a kind of natural gas flowmeter verification system based on electric-heating technology, it is described
Natural gas flowmeter verification system includes filter separator 10, lowering and stabilizing blood pressure module 30, turbine flowmeter 40 and Flow-rate adjustment
Valve 60, the filter separator 10, lowering and stabilizing blood pressure module 30, turbine flowmeter 40 and flow control valve 60 are successively set on
On the natural-gas transfer pipeline of natural gas flowmeter verification system, wherein, flowmeter 50 to be detected be arranged on turbine flowmeter 40,
Between flow control valve 60；Specifically, the filter separator 10 is horizontal filter separator 10, in natural gas
Impurity is filtered；The lowering and stabilizing blood pressure module 30 is used for trunk line pressure reducing pressure by regulating flow to 5.0MPa；The turbine flow
Meter 40 is used to be contrasted with flowmeter 50 to be detected, so as to judge whether flowmeter 50 to be detected is qualified；The Flow-rate adjustment
Valve 60 is used to be controlled the flow of natural gas；Because flow control valve 60 has the fluctuation of pressure during Flow-rate adjustment
And noise, large effect is easily caused to verification result, therefore, flow control valve 60 turbine flowmeter 40 is arranged on treating
After detection stream gauge 50, the influence of pressure oscillation and noise to verification result is eliminated.
Because the gas discharge in natural conveyance conduit is larger, the gas source and flow amount set more than flowmeter examination criteria,
Therefore, detection branch and side are branched between lowering and stabilizing blood pressure module 30, turbine flowmeter 40 in the natural-gas transfer pipeline
Logical branch road, the detection branch is provided with turbine flowmeter 40, flowmeter to be detected 50 and flow control valve 60, the side
Logical branch road is provided with flow bypass valve 70, by designing bypass branch, using in 70 pairs of natural conveyance conduits of flow bypass valve
Gas discharge is monitored automatically, will be branched to beyond the gas source and flow amount of examination criteria on bypass branch, so as to reduce trunk
The supply influence of line, is that flowmeter 50 to be detected provides standard compliant gas source and flow amount.
Wherein, electric heating control module 20 is provided between the filter separator 10, lowering and stabilizing blood pressure module 30, for inspection
Fixed natural gas enters trip temperature and heated, so as to avoid natural gas from separating out liquid in decompression verification process, influences verification result, very
To noise device damage the problem of, and the electric heating control module 20 is arranged on before lowering and stabilizing blood pressure module 30, therefore, right
Natural gas is the regulative mode being depressured afterwards using first heating, and further avoids producing the problem of ice is stifled during decompression.Specifically, described
Electric heating control module 20 is from the grand temperature controller of U.S.'s watt, and its heating element heater is tube type electric-heating element, by selecting watt
Grand temperature controller, so as to make fluctuation range in gas temperature undulated control 10 minutes that in ± 0.5 DEG C, model is fluctuated in 1 hour
It is trapped among in ± 1 DEG C, greatly improves calibrating efficiency height, while install compact, floor space is small, many parallel operations is convenient.
Detection flows are being treated using the natural gas flowmeter verification system described in the utility model based on electric-heating technology
When meter 50 is detected, the temperature drop that bleed pressure is produced is calculated first, and in the winter time under the conditions of 10 DEG C of temperature, by maximum duty
Flow is depressured after cooling for 480Nm3/h natural gas from 8.5MPa reducing pressure by regulating flow to 5.0MPa needed for when being heated to 20 DEG C
The thermic load wanted, electric heater unit is controlled according to the power consumption values that calculating is obtained, when endogenous pyrogen is constant and for 2000kW/m3, day
Right gas reaches 20 DEG C and keeps stable required time about 6 minutes, and now natural gas temperature fluctuating range is ± 0.024 DEG C, from
And meet requirement of the fluctuation range in ± 0.5 DEG C in gas temperature undulated control 10 minutes.
Natural gas flowmeter verification system described in the utility model based on electric-heating technology, it passes through in the filtering point
From electric heating control module 20 is provided between device 10, lowering and stabilizing blood pressure module 30, using 20 pairs of calibrating days of electric heating control module
Right gas enters trip temperature heating, so as to avoid natural gas from separating out liquid in decompression verification process, influences verification result, or even noise
The problem of damage of equipment, and the electric heating control module 20 is arranged on before lowering and stabilizing blood pressure module 30, therefore, to natural gas
It is the regulative mode being depressured afterwards using first heating, further avoids producing the problem of ice is stifled during decompression.Simultaneously by selecting watt
Grand temperature controller, so as to make fluctuation range in gas temperature undulated control 10 minutes that in ± 0.5 DEG C, model is fluctuated in 1 hour
It is trapped among in ± 1 DEG C, greatly improves calibrating efficiency height, while install compact, floor space is small, many parallel operations is convenient.
Above-described embodiment is the utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The limitation of embodiment, it is other it is any without departing from Spirit Essence of the present utility model with made under principle change, modify, replace
Generation, combination, simplification, should be equivalent substitute mode, are included within protection domain of the present utility model.
Claims (3)
1. a kind of natural gas flowmeter verification system based on electric-heating technology, it is characterised in that the natural gas flowmeter inspection
Determine to be sequentially provided with filter separator (10), lowering and stabilizing blood pressure module (30), turbine flowmeter on the natural-gas transfer pipeline of system
(40) electric heating control and flow control valve (60), is provided between the filter separator (10), lowering and stabilizing blood pressure module (30)
Module (20), flowmeter (50) to be detected is arranged between turbine flowmeter (40), flow control valve (60).
2. the natural gas flowmeter verification system based on electric-heating technology according to claim 1, it is characterised in that the day
Right letter shoot road branches into detection branch and bypass branch from lowering and stabilizing blood pressure module (30), turbine flowmeter between (40), institute
Detection branch is stated provided with turbine flowmeter (40), flowmeter to be detected (50) and flow control valve (60), the bypass branch
Road is provided with flow bypass valve (70).
3. the natural gas flowmeter verification system based on electric-heating technology according to claim 1, it is characterised in that the electricity
The heating element heater of heating control module (20) is tube type electric-heating element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720090461.1U CN206440358U (en) | 2017-01-24 | 2017-01-24 | Natural gas flowmeter verification system based on electric-heating technology |
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| CN201720090461.1U CN206440358U (en) | 2017-01-24 | 2017-01-24 | Natural gas flowmeter verification system based on electric-heating technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220574A (en) * | 2019-06-26 | 2019-09-10 | 东华理工大学 | Gas flow calibration system, method and device |
| CN110793599A (en) * | 2019-10-30 | 2020-02-14 | 中国航发控制系统研究所 | High-pressure high-low temperature fuel flow measuring system |
| CN114001803A (en) * | 2021-09-09 | 2022-02-01 | 浙江浙能天然气运行有限公司 | Bypass type natural gas flow automatic verification control system and control method thereof |
| CN115218994A (en) * | 2021-04-21 | 2022-10-21 | 中国石油天然气股份有限公司 | Natural gas flowmeter testing device and method |
-
2017
- 2017-01-24 CN CN201720090461.1U patent/CN206440358U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220574A (en) * | 2019-06-26 | 2019-09-10 | 东华理工大学 | Gas flow calibration system, method and device |
| CN110793599A (en) * | 2019-10-30 | 2020-02-14 | 中国航发控制系统研究所 | High-pressure high-low temperature fuel flow measuring system |
| CN115218994A (en) * | 2021-04-21 | 2022-10-21 | 中国石油天然气股份有限公司 | Natural gas flowmeter testing device and method |
| CN114001803A (en) * | 2021-09-09 | 2022-02-01 | 浙江浙能天然气运行有限公司 | Bypass type natural gas flow automatic verification control system and control method thereof |
| CN114001803B (en) * | 2021-09-09 | 2024-02-27 | 国家管网集团浙江省天然气管网有限公司 | Bypass type natural gas flow automatic verification control system and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200824 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: China Petroleum & Chemical Corp. Address before: 430070 No. 126 Optics Valley Avenue, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: METERING RESEARCH CENTER, NATURAL GAS BRANCH OF CHINA PETROLEUM AND CHEMICAL Corp. |
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| TR01 | Transfer of patent right |