CN104422498A - Natural gas flow measuring ring detecting section device capable of reducing natural gas pulsating flow - Google Patents

Natural gas flow measuring ring detecting section device capable of reducing natural gas pulsating flow Download PDF

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Publication number
CN104422498A
CN104422498A CN201310388623.6A CN201310388623A CN104422498A CN 104422498 A CN104422498 A CN 104422498A CN 201310388623 A CN201310388623 A CN 201310388623A CN 104422498 A CN104422498 A CN 104422498A
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China
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tested
straight length
flow
straight
natural gas
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CN201310388623.6A
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CN104422498B (en
Inventor
彭利果
段继芹
任佳
付建华
黄敏
黄和
王辉
周代兵
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The invention discloses a natural gas flow measuring ring detecting section device capable of reducing natural gas pulsating flow, and belongs to the field of measuring of natural gas flow. The device at least comprises a standard flow meter device, a detected flow meter device, a gas inlet pipeline and a gas outlet pipeline; the standard flow meter device is an irregular reducing gathering pipeline; the downstream end of the standard flow meter device is connected with a reducing pipe line of the detected flow meter device, and while the upstream end of the standard flow meter device is connected with the gas inlet pipeline; the gas outlet pipeline is connected to the downstream end of the reducing pipe line of the detected flow meter device; the standard flow meter device at least comprises an irregular gathering pipe, a forced seal ball valve, a flowing adjusting device, a standard flow meter, a double-seal ball valve, a first straight pipe section, a second straight pipe section, a central straight pipe section, a third straight pipe section and a fourth straight pipe section. The device has the advantages that the gathering pipeline structure and the pipe line arrangement are optimized to enable large reduction on the natural gas pressure and temperature fluctuation at the standard flow meter device and the detected flow meter position.

Description

Cut down the natural gas flow measuring circuit detection segment device of rock gas Pulsating Flow
Technical field
The present invention relates to natural gas flow measuring field, particularly a kind of natural gas flow measuring circuit detection segment device cutting down rock gas Pulsating Flow.
Background technology
Existing natural gas flow measuring circuit pick-up unit, as shown in Figure 1, for a natural gas flow measuring circuit pick-up unit, at least comprises: circuit compressor assembly, circuit cooling system, voltage-regulating system, detection segment device, current stabilization air compensating system etc.; Wherein, detection segment device is the critical process link of natural gas flow measuring circuit pick-up unit, its pipeline structure, line arrangement directly have influence on the rock gas fluidised form of natural gas flow measuring circuit detection segment, have influence on the pressure stabilities of natural gas flow measuring circuit pick-up unit, temperature stability, thus affect the overall technology level of device.
Realizing in process of the present invention, inventor finds that prior art at least exists following problem:
At present, China's natural gas flow real stream calibrating station all adopts direct discharge system, and detection capability changes by the change of the bleed pressure that enters the station, flow, if bleed pressure is low, and flowmeter uses pressure high, then can not meet natural gas flowmeter calibrating demand.
Domesticly also do not build up natural gas flow measuring circuit pick-up unit, there is no ready-made this critical process link of natural gas flow measuring circuit detection segment device yet.
Foreign natural gas flow metering circuit pick-up unit mainly adopts T-shaped header circuit detection segment device.But have the following disadvantages:
1) adopt T-shaped header, in header intersection, rock gas fluidised form is disorderly, is unfavorable for cutting down rock gas pulsation;
2) normal flow counter device straight length is arranged unbalanced, proving flowmeter and tested flowmeter riding position improper, can cause at normal flow device and tested flowmeter place gas pressure, temperature fluctuation larger, cause the gas pressure degree of stability of natural gas flow measuring circuit pick-up unit between detection period, temperature stability exceedes index, whole system not meet volume value is traced to the source the requirement of uncertainty.
3) on normal flow counter device place straight length, installing flow conditioner, is pipe diameter in flow conditioner downstream less than 15D(D) installation code meter flow-meter afterwards, fluidised form is disorderly, is unfavorable for gas pressure degree of stability, temperature stability meets technical indicator.
Summary of the invention
In order to solve the problem of prior art, embodiments provide a kind of natural gas flow measuring circuit detection segment device cutting down rock gas Pulsating Flow.By being optimized header line structure, pipeline line arrangement, gas pressure, the temperature fluctuation amplitude that can decay at normal flow counter device and tested flowmeter position, promote natural gas flow measuring magnitude tracing ability.Described technical scheme is as follows:
A kind of natural gas flow measuring circuit detection segment device cutting down rock gas Pulsating Flow, at least comprise: normal flow device, tested flow apparatus, admission line, pipeline of giving vent to anger, described normal flow device is variable-diameter special-shaped header road, its downstream end connects the tapered pipeline pipeline of described tested flow apparatus, and its upstream extremity connects described admission line; To give vent to anger described in the tapered pipeline pipe line downstream end of described tested flow apparatus connects pipeline; Described normal flow device at least comprises: special-shaped header, forced seal ball valve, flow conditioner, proving flowmeter, double-seal ball valve and the first straight length, the second straight length, central straight pipeline section, the 3rd straight length, the 4th straight length.
Particularly, described special-shaped header is that two variable diameters bend header, be symmetrical arranged, be connected with some straight lengths therebetween, described central straight pipeline section is arranged in center between two described special-shaped headers, and the symmetria bilateralis being axle with described central straight pipeline section is provided with and is parallel to each other and caliber is greater than described first straight length of described central straight pipeline section caliber, described second straight length and described 3rd straight length, described 4th straight length.
Particularly, the middle part of described special-shaped header is straight length, described second straight length is connected the two ends of straight length with described 3rd straight length, straight length both ends bend angle in 90 °, and diameter is by large gradually little, described first straight length, described 4th straight length connect the small end of two articles of described special-shaped header gradual changes respectively.
Particularly, described central straight pipeline section is connected with described forced seal ball valve, described flow conditioner, described proving flowmeter, described double-seal ball valve in turn from rock gas air inlet to outgassing direction; Described first straight length is connected with in turn the first forced seal ball valve, the first flow conditioner, the first proving flowmeter, the first double-seal ball valve; Described second straight length is connected with in turn the second forced seal ball valve, the second flow conditioner, the second proving flowmeter, the second double-seal ball valve; Described 3rd straight length is connected with in turn the 3rd and forces seal ball-valve, the 3rd flow conditioner, the 3rd proving flowmeter, the 3rd double-seal ball valve; Described 4th straight length is connected with in turn the 4th and forces seal ball-valve, the 4th flow conditioner, the 4th proving flowmeter, the 4th double-seal ball valve.
Particularly, described tested flow apparatus at least comprises: tested flow conditioner, tested flowmeter, common header and tested first straight length, tested central straight pipeline section, tested second straight length.
Particularly, described tested central straight pipeline section is arranged in the center of described tested flow apparatus, the symmetria bilateralis being axle with described tested central straight pipeline section be provided be parallel to each other and caliber is less than described tested first straight length of described tested central straight pipeline section caliber and described tested second straight length.
Further, described tested first straight length is concentric with the second straight length of described normal flow device, and described tested second straight length caliber is less than described tested first straight length caliber, concentric with the 3rd straight length of described normal flow device.
Particularly, described tested central straight pipeline section upstream extremity is connected with the special-shaped header of the downstream end of described normal flow device, and it is concentric with the central straight pipeline section of described normal flow device, described tested central straight pipeline section downstream end is connected with described common header, pipeline of giving vent to anger described in described common header connects.
Particularly, described tested central straight pipeline section is connected with described tested flow conditioner, described tested flowmeter in turn from rock gas air inlet to outgassing direction; Described tested first straight length is connected with in turn described first tested flow conditioner, described first tested flowmeter; Described tested second straight length is connected with in turn described second tested flow conditioner, described second tested flowmeter.
Further, described admission line is provided with gas admittance valve, described in give vent to anger on pipeline and be provided with air outlet valve.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By the some variable-diameter special-shaped header road of normal flow device being connected some tapered pipeline pipelines of tested flow apparatus, header line structure, pipeline line arrangement are optimized, make the gas pressure of natural gas flow measuring circuit detection segment device in normal flow counter device and tested flowmeter position, temperature fluctuation attenuation amplitude larger, meet pressure stabilities to be no more than ± 0.07%, temperature stability is no more than ± requirement of 0.1 DEG C, and then make domestic first overlap natural gas flow measuring circuit pick-up unit to meet the requirement that flow measurement uncertainty is 0.33%.To construction domestic natural gas flow metering circuit pick-up unit, lifting natural gas flow measuring magnitude tracing ability, there is good application prospect.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is existing natural gas flow measuring circuit structure of the detecting device schematic diagram;
Fig. 2 is the natural gas flow measuring circuit detection segment apparatus structure schematic diagram of the reduction rock gas Pulsating Flow that the embodiment of the present invention provides.
In figure, each symbol represents that implication is as follows:
1 normal flow device;
1.1 special-shaped headers;
1.2 forced seal ball valves;
1.2a first forced seal ball valve, 1.2b second forced seal ball valve, 1.2c the 3rd forces seal ball-valve, and 1.2d the 4th forces seal ball-valve;
1.3 flow conditioner;
1.3a first adjuster, 1.3b second adjuster, 1.3c the 3rd adjuster, 1.3d the 4th adjuster;
1.4 proving flowmeter;
1.4a first proving flowmeter, 1.4b second proving flowmeter, 1.4c the 3rd proving flowmeter, 1.4d the 4th proving flowmeter;
1.5 double-seal ball valves (DBB ball valve);
1.5a first double-seal ball valve, 1.5b second double-seal ball valve, 1.5c the 3rd double-seal ball valve, 1.5d the 4th double-seal ball valve;
1a first straight length, 1b second straight length, 1c central straight pipeline section, 1d the 3rd straight length, 1e the 4th straight length;
2 tested flow apparatus;
2.1 tested flow conditioners;
The tested flow conditioner of 2.1a first, the tested flow conditioner of 2.1b second;
2.2 tested flowmeters;
The tested flowmeter of 2.2a first, the tested flowmeter of 2.2b second;
2.3 common headers;
Tested first straight length of 2a, the tested central straight pipeline section of 2b, tested second straight length of 2c;
3 admission lines, 3.1 gas admittance valves;
4 give vent to anger pipeline, 4.1 air outlet valves.
In figure, the direction of arrow is natural gas flow direction (namely rock gas is by the direction of admission line to pipeline of giving vent to anger).
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Consult shown in Fig. 2, embodiments provide a kind of natural gas flow measuring circuit detection segment device cutting down rock gas Pulsating Flow, solve the disorderly and pulsation problem of normal flow device and tested flowmeter place fluidised form, to meet gas pressure degree of stability, the temperature stability index of natural gas flow measuring circuit pick-up unit.
Particularly, described natural gas flow measuring circuit detection segment device at least comprises: normal flow device 1, tested flow apparatus 2, admission line 3, pipeline 4 etc. of giving vent to anger; Described normal flow device 1 is variable-diameter special-shaped header road, and its downstream end connects the tapered pipeline pipeline of tested flow apparatus 2, and its upstream extremity connects admission line 3; The tapered pipeline pipe line downstream end of described tested flow apparatus 2 connects pipeline 4 of giving vent to anger; This detection segment device can realize from normal flow device 1 to the gas pressure of tested flow apparatus 2, temperature fluctuation decay.
Particularly; as preferably, described normal flow device 1 at least comprises: special-shaped header 1.1, forced seal ball valve 1.2, flow conditioner 1.3, proving flowmeter 1.4, double-seal ball valve 1.5 and the first straight length 1a, the second straight length 1b, central straight pipeline section 1c, the 3rd straight length 1d, the 4th straight length 1e etc.; Described special-shaped header 1.1 is that two variable diameters bend header, is symmetrical arranged, is connected with some straight lengths therebetween, at least comprises: the first straight length 1a, the second straight length 1b, central straight pipeline section 1c, the 3rd straight length 1d, the 4th straight length 1e; Described central straight pipeline section 1c is the pipeline of a caliber DN80, be arranged in center between two special-shaped headers 1.1, the symmetria bilateralis being simultaneously axle with central straight pipeline section 1c is provided with and is parallel to each other and caliber is greater than central straight pipeline section 1c caliber, be the first straight length 1a of DN150, the second straight length 1b and the 3rd straight length 1d, the 4th straight length 1e, and the spacing of each adjacent straight pipeline section is 1m; The special-shaped header 1.1 of described upstream extremity connects admission line 3, admission line 3 is provided with gas admittance valve 3.1, and the special-shaped header 1.1 of described downstream end connects the pipeline of tested flow apparatus 2.
The middle part of each special-shaped header 1.1 described is straight length, second straight length 1b is connected the two ends of straight length with the 3rd straight length 1d, straight length both ends bend angle in 90 °, and diameter is by large gradually little, namely 150mm is faded to by 300mm, to reduce the rock gas pulsation brought upstream, described first straight length 1a, the 4th straight length 1e connect the small end of two articles of special-shaped headers 1.1 gradual change respectively.
Described central straight pipeline section 1c is connected with forced seal ball valve 1.2, flow conditioner 1.3, proving flowmeter 1.4, double-seal ball valve 1.5 in turn from rock gas air inlet to outgassing direction; Described first straight length 1a is connected with in turn the first forced seal ball valve 1.2a, the first flow conditioner 1.3a, the first proving flowmeter 1.4a, the first double-seal ball valve 1.5a; Described second straight length 1b is connected with in turn the second forced seal ball valve 1.2b, the second flow conditioner 1.3b, the second proving flowmeter 1.4b, the second double-seal ball valve 1.5b; Described 3rd straight length 1d is connected with in turn the 3rd and forces seal ball-valve 1.2c, the 3rd flow conditioner 1.3c, the 3rd proving flowmeter 1.4c, the 3rd double-seal ball valve 1.5c; Described 4th straight length 1e is connected with in turn the 4th and forces seal ball-valve 1.2d, the 4th flow conditioner 1.3d, the 4th proving flowmeter 1.4d, the 4th double-seal ball valve 1.5d.
Particularly, as preferably, described tested flow apparatus 2 at least comprises: tested flow conditioner 2.1, tested flowmeter 2.2, common header 2.3 and tested first straight length 2a, tested central straight pipeline section 2b, tested second straight length 2c etc., described tested central straight pipeline section 2b is the pipeline of a caliber DN250, be arranged in the center of tested flow apparatus 2, the symmetria bilateralis being axle with tested central straight pipeline section 2b be provided be parallel to each other and caliber is less than the tested first straight length 2a of tested central straight pipeline section 2b caliber and tested second straight length 2c, described tested first straight length 2a is the pipeline of a caliber DN150, concentric with the second straight length 1b of normal flow device 1, described tested second straight length 2c is the pipeline of a caliber DN80, caliber is less than tested first straight length 2a caliber, concentric with the 3rd straight length 1d of normal flow device 1, and the spacing of each adjacent straight pipeline section is 1m, described tested central straight pipeline section 2b upstream extremity is connected with the special-shaped header 1.1 of the downstream end of normal flow device 1, and it is concentric with the central straight pipeline section 1c of normal flow device 1, downstream end is connected with common header 2.3, common header 2.3 connects pipeline 4 of giving vent to anger, described in give vent to anger on pipeline 4 and be provided with air outlet valve 4.1.
Described tested central straight pipeline section 2b is connected with tested flow conditioner 2.1, tested flowmeter 2.2 in turn from rock gas air inlet to outgassing direction; Tested first straight length 2a is connected with in turn the first tested flow conditioner 2.1a, the first tested flowmeter 2.2a; Tested second straight length 2c is connected with in turn the second tested flow conditioner 2.1b, the second tested flowmeter 2.2b.
The principle of work of the embodiment of the present invention: adopt natural gas flow measuring circuit pick-up unit, flowmeter detection zone is returned to after carrying out supercharging, cooling with the rock gas that detection zone is discharged by circulation power equipment, whole signal piping is made to form a circular passage, and natural gas temperature, pressure and flow is controlled in this circular passage, carry out the natural gas flowmeter calibrating under specified conditions or calibration, solve the restriction of detection capability by external air source change at current gas discharge real stream calibrating station.
Some tapered pipeline pipelines of tested flow apparatus 2 are connected by the some variable-diameter special-shaped header road of normal flow device 1, the pulsation of detection segment rock gas can be cut down, guarantee that gas pressure degree of stability is no more than between detection period ± 0.07%, temperature stability is no more than ± and 0.1 DEG C, ensure that whole circuit system realizes detected pressures (0.3-6.0) MPa, operating mode flow (5 ~ 4000) m3/h, and then make domestic first cover natural gas flow measuring circuit pick-up unit meet the requirement that flow measurement uncertainty is 0.33%.
In addition, the advantage that the embodiment of the present invention also has, adopts variable-diameter special-shaped header, instead of the direct discharge system that China adopts and the T-shaped header adopted abroad, has filled up the blank of China's natural gas flow metering circuit detection segment device.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. cut down the natural gas flow measuring circuit detection segment device of rock gas Pulsating Flow for one kind, at least comprise: normal flow device, tested flow apparatus, admission line, pipeline of giving vent to anger, it is characterized in that, described normal flow device is variable-diameter special-shaped header road, its downstream end connects the tapered pipeline pipeline of described tested flow apparatus, and its upstream extremity connects described admission line; To give vent to anger described in the tapered pipeline pipe line downstream end of described tested flow apparatus connects pipeline; Described normal flow device at least comprises: special-shaped header, forced seal ball valve, flow conditioner, proving flowmeter, double-seal ball valve and the first straight length, the second straight length, central straight pipeline section, the 3rd straight length, the 4th straight length.
2. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 1, it is characterized in that, described special-shaped header is that two variable diameters bend header, be symmetrical arranged, be connected with some straight lengths therebetween, described central straight pipeline section is arranged in center between two described special-shaped headers, and the symmetria bilateralis being axle with described central straight pipeline section is provided with and is parallel to each other and caliber is greater than described first straight length of described central straight pipeline section caliber, described second straight length and described 3rd straight length, described 4th straight length.
3. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 2, it is characterized in that, the middle part of described special-shaped header is straight length, described second straight length is connected the two ends of straight length with described 3rd straight length, straight length both ends bend angle in 90 °, and diameter is by large gradually little, described first straight length, described 4th straight length connect the small end of two articles of described special-shaped header gradual changes respectively.
4. the natural gas flow measuring circuit detection segment device of the reduction rock gas Pulsating Flow according to any one of claim 1-3, it is characterized in that, described central straight pipeline section is connected with described forced seal ball valve, described flow conditioner, described proving flowmeter, described double-seal ball valve in turn from rock gas air inlet to outgassing direction; Described first straight length is connected with in turn the first forced seal ball valve, the first flow conditioner, the first proving flowmeter, the first double-seal ball valve; Described second straight length is connected with in turn the second forced seal ball valve, the second flow conditioner, the second proving flowmeter, the second double-seal ball valve; Described 3rd straight length is connected with in turn the 3rd and forces seal ball-valve, the 3rd flow conditioner, the 3rd proving flowmeter, the 3rd double-seal ball valve; Described 4th straight length is connected with in turn the 4th and forces seal ball-valve, the 4th flow conditioner, the 4th proving flowmeter, the 4th double-seal ball valve.
5. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 1, it is characterized in that, described tested flow apparatus at least comprises: tested flow conditioner, tested flowmeter, common header and tested first straight length, tested central straight pipeline section, tested second straight length.
6. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 5, it is characterized in that, described tested central straight pipeline section is arranged in the center of described tested flow apparatus, the symmetria bilateralis being axle with described tested central straight pipeline section be provided be parallel to each other and caliber is less than described tested first straight length of described tested central straight pipeline section caliber and described tested second straight length.
7. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 6, it is characterized in that, described tested first straight length is concentric with the second straight length of described normal flow device, described tested second straight length caliber is less than described tested first straight length caliber, concentric with the 3rd straight length of described normal flow device.
8. cut down the natural gas flow measuring circuit detection segment device of rock gas Pulsating Flow according to claim 1 or 5, it is characterized in that, described tested central straight pipeline section upstream extremity is connected with the special-shaped header of the downstream end of described normal flow device, and it is concentric with the central straight pipeline section of described normal flow device, described tested central straight pipeline section downstream end is connected with described common header, pipeline of giving vent to anger described in described common header connects.
9. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 5, it is characterized in that, described tested central straight pipeline section is connected with described tested flow conditioner, described tested flowmeter in turn from rock gas air inlet to outgassing direction; Described tested first straight length is connected with in turn described first tested flow conditioner, described first tested flowmeter; Described tested second straight length is connected with in turn described second tested flow conditioner, described second tested flowmeter.
10. the natural gas flow measuring circuit detection segment device of reduction rock gas Pulsating Flow according to claim 1, is characterized in that, described admission line is provided with gas admittance valve, described in give vent to anger on pipeline and be provided with air outlet valve.
CN201310388623.6A 2013-08-30 2013-08-30 The natural gas flow measuring circuit for cutting down natural gas Pulsating Flow detects section apparatus Active CN104422498B (en)

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CN108225443A (en) * 2016-12-14 2018-06-29 中国石油天然气股份有限公司 Gas discharge detects circuit device
CN110857878A (en) * 2018-08-23 2020-03-03 中国石油天然气股份有限公司 Natural gas flowmeter calibration method
CN111854858A (en) * 2019-04-26 2020-10-30 中国石油天然气股份有限公司 Method and device for determining working performance of working standard device of loop turbine
CN111854860A (en) * 2019-04-26 2020-10-30 中国石油天然气股份有限公司 Natural gas flowmeter calibrating device and method

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CN202075022U (en) * 2011-04-22 2011-12-14 中国石油天然气股份有限公司 On-line real-flow verification device for small natural gas flow meter
CN202501910U (en) * 2012-03-30 2012-10-24 杭州市质量技术监督检测院 Calibrating device for heavy caliber gas flow

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Publication number Priority date Publication date Assignee Title
CN101576403A (en) * 2008-05-05 2009-11-11 孙永岐 Gas flow standard device
CN201225920Y (en) * 2008-07-11 2009-04-22 河北省计量监督检测院 Gas flow standard device combining acoustic speed nozzle method and standard table method
CN202075022U (en) * 2011-04-22 2011-12-14 中国石油天然气股份有限公司 On-line real-flow verification device for small natural gas flow meter
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108225443A (en) * 2016-12-14 2018-06-29 中国石油天然气股份有限公司 Gas discharge detects circuit device
CN110857878A (en) * 2018-08-23 2020-03-03 中国石油天然气股份有限公司 Natural gas flowmeter calibration method
CN111854858A (en) * 2019-04-26 2020-10-30 中国石油天然气股份有限公司 Method and device for determining working performance of working standard device of loop turbine
CN111854860A (en) * 2019-04-26 2020-10-30 中国石油天然气股份有限公司 Natural gas flowmeter calibrating device and method

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