CN1085333C - Divided-flow split-phase type two-phase fluid flow measuring method - Google Patents
Divided-flow split-phase type two-phase fluid flow measuring method Download PDFInfo
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- CN1085333C CN1085333C CN 98113068 CN98113068A CN1085333C CN 1085333 C CN1085333 C CN 1085333C CN 98113068 CN98113068 CN 98113068 CN 98113068 A CN98113068 A CN 98113068A CN 1085333 C CN1085333 C CN 1085333C
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Abstract
一种流量测量技术领域的测量方法，首先通过分配器分流出一部分两相流体，接着使用分离器将这部分两相流体分离成单相气体和单相液体，然后分别用单相气体流量计和单相液体流量计进行计量并根据比例关系换算成被测两相流体的流量及组份，最后再分别将这部分单相气体和单相液体返回两相流体的流动管道中。本方法易于实现，测量精度高，测量范围大。
A measurement method in the field of flow measurement technology. First, a part of the two-phase fluid is divided through a distributor, and then a separator is used to separate this part of the two-phase fluid into a single-phase gas and a single-phase liquid, and then the single-phase gas flowmeter and the single-phase liquid are respectively used to separate the two-phase fluid. The single-phase liquid flowmeter performs measurement and converts it into the flow rate and composition of the measured two-phase fluid according to the proportional relationship, and finally returns this part of the single-phase gas and single-phase liquid to the flow pipeline of the two-phase fluid. The method is easy to realize, has high measurement precision and a large measurement range.
Description
The invention belongs to the flow measurement technology field, further relate to the measuring method of interior gas-liquid two-phase fluid flow of a kind of pipeline and component.
In oil thermal recovery, the steam that injects in the oil well is steam-water two-phase fluid potpourri, require accurately metering and control to inject the steam flow and the component of every mouthful of well on the oil production technology, also need simultaneously to detect with the reasonable distribution steam injection pipe network in the steam flow and the component of each arm.Be generally rock gas-oil water mixture in oil recovery and petroleum pipeline, the metering of oil and gas production and the detection of petroleum pipeline all need the two-phase fluid flowmeter.The flow operating mode that also usually occurs various gas-liquid two-phase fluids in addition in other industry and civil pipeline has only the two-phase fluid of use flowmeter accurately its flow of metering and component.
Lin Zonghu " gas-liquid-solid multiphase flow measurement " (China Measuring Press, 1988) book chapter 3, chapter 4 and chapter 6 third and fourth, five the joint in, summed up each sharp two-phase fluid flow and component measuring method.These methods all directly place two-phase fluid to measure measurement instrument.R Thorn " Recent developments in three-phase flowmeasurement " (Measurement Science ﹠amp; Technology, Vol 8, N07,1997, pp691-701) in the literary composition, summarized the latest developments of various gas-oil water mixture measuring method.Equally, these methods also all directly place two-phase fluid to measure measurement instrument.Because a notable feature of two-phase fluid is to flow to have strong undulatory property, and along with the variation of two-phase fluid component, flow pattern is also constantly changing.Therefore, the instrument of on-line operation in two-phase fluid, the quality of its output signal is generally relatively poor, and undulatory property is big, and measuring accuracy is low, and measurement range is little.
The conventional way that addresses this problem is at first to adopt separation vessel that two-phase fluid is separated into single phase gas and single-phase liquid, then respectively with single-phase flowmeter metering.A book chapter 6 the 6th saves this method of having introduced to Lin Zonghu in " gas-liquid-solid multiphase flow measurement " (China Measuring Press, 1988).But its disadvantage is that the volume of separation vessel is too huge, the cost height, and resistance is big.Thereby should not make the instrument widespread use.
The objective of the invention is to solve the defective of above prior art, a kind of divided-flow split-phase type two-phase fluid flow measuring method is provided.Adopt this method both can make the metering of two-phase fluid change into the metering of monophasic fluid, do not make the volume of separation vessel excessive again simultaneously, become widespread use so that make instrument.
The present invention is by the method for shunting phase-splitting, at first distribute a part of two-phase fluid pro rata by divider, then use separation vessel that this part two-phase fluid is separated into single phase gas and single-phase liquid, measure and be converted under a proportional relationship the flow and the component of tested two-phase fluid then respectively with single phase gas flowmeter and single-phase liquid flowmeter, respectively this part single phase gas and single-phase liquid are returned in the flow duct of two-phase fluid more at last.
Fig. 1 is a measuring method synoptic diagram of the present invention.
Fig. 2 is a kind of short-cut method synoptic diagram of subject matter.
Fig. 3 is the another kind of short-cut method synoptic diagram of subject matter.
Referring now to Fig. 1, Fig. 2, Fig. 3, the present invention is elaborated.In Fig. 1, the flow duct of the tested two-phase fluid of 1 expression.2 expression dividers.Tested two-phase fluid at first enters divider, and two-phase fluid is divided into some parts (5～50 parts) in divider, and each part all occupies a not connected space cell individually, and guarantees that the flow in each unit is all identical with component; And then shunt after flowing through divider, select the fewer cells in the divider to lead to separation vessel 3, all the other still lead to pipeline 1; In separation vessel, the two-phase fluid in the selected unit is separated into single phase gas and single-phase liquid; Single phase gas enters gas meter 5 by gasmetry pipeline 4 and measures; Single-phase liquid enters liquid flowmeter 7 by liquid measure pipeline 6 and measures; In single phase gas after the metering and single-phase liquid difference Returning pipe 1.At last, under a proportional relationship the reading of gas meter and liquid flowmeter is converted into the flow and the component of tested two-phase fluid.8 expression resistance pieces.The characteristic of proportionate relationship depends on the characteristic of resistance piece and leads to the number of unit of separation vessel.
In Fig. 2, the flow duct of the tested two-phase fluid of 1 expression, 9 expression shunting separation vessels, it is the merging body of divider and separation vessel.Can tell a part of single phase gas by the shunting separation vessel from tested two-phase fluid, this part single phase gas enters gas meter 5 through gasmetry pipeline 4 and measures, in the single phase gas Returning pipe 1 after the metering.At last, under a proportional relationship the reading of gas meter is converted into the flow or the component of tested two-phase fluid.8 expression resistance pieces, its characteristic has determined the characteristic of proportionate relationship.This method is a kind of reduction procedure, is applicable in the two-phase fluid that flow or one of them parameter of component are occasion known and that air content is higher relatively.
In Fig. 3, the flow duct of the tested two-phase fluid of 1 expression, 9 expression shunting separation vessels, it is the merging body of divider and separation vessel.Symmetrical with Fig. 2, can from tested two-phase fluid, tell a part of single-phase liquid by the shunting separation vessel, this part single-phase liquid enters liquid flowmeter 7 through measuring channel 6 and measures, in the single-phase liquid Returning pipe 1 after the metering.At last, under a proportional relationship the reading of liquid flowmeter is converted into the flow or the component of tested two-phase fluid.8 expression resistance pieces, its characteristic has determined the characteristic of proportionate relationship.This method also is a kind of reduction procedure, is applicable in the two-phase fluid that flow or one of them parameter of component are occasion known and that air content is less relatively.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113068 CN1085333C (en) | 1998-12-30 | 1998-12-30 | Divided-flow split-phase type two-phase fluid flow measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113068 CN1085333C (en) | 1998-12-30 | 1998-12-30 | Divided-flow split-phase type two-phase fluid flow measuring method |
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| Publication Number | Publication Date |
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| CN1228528A CN1228528A (en) | 1999-09-15 |
| CN1085333C true CN1085333C (en) | 2002-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 98113068 Expired - Fee Related CN1085333C (en) | 1998-12-30 | 1998-12-30 | Divided-flow split-phase type two-phase fluid flow measuring method |
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Families Citing this family (11)
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|---|---|---|---|---|
| CN100346140C (en) * | 2004-03-01 | 2007-10-31 | 西安交通大学 | Time-division multi-phase fluid ratio distribution method and device |
| FR2975772B1 (en) * | 2011-05-25 | 2014-02-28 | Air Liquide | PRESSURE FOR DIPHASIC FLUIDS GAS / CRYOGENIC LIQUID |
| CN102392939A (en) * | 2011-09-06 | 2012-03-28 | 中国石油集团工程设计有限责任公司 | Multiphase flow metering system and method |
| CN102620791B (en) * | 2012-04-12 | 2016-03-09 | 新奥气化采煤有限公司 | Method and system, the multiphase flow distribution device of gas flow in metering polyphasic flow |
| CN103791952B (en) * | 2012-10-29 | 2018-03-16 | 中国石油化工股份有限公司 | Oil field ground wet steam flow dryness measurement device |
| CN103894004B (en) * | 2014-02-28 | 2015-08-05 | 西安交通大学 | Mass dryness fraction distributor and the methods such as a kind of novel gas-liquid two-phase fluid |
| CN104075766B (en) * | 2014-06-19 | 2017-03-29 | 西安交通大学 | The high void fraction gas-liquid two-phase fluid flow measurement device of phase cellular-type and method in pipe |
| CN105928730B (en) * | 2016-04-19 | 2018-08-07 | 中国原子能科学研究院 | A kind of device and method for dispensing two-phase coexistent sample in hot cell |
| CN106053726A (en) * | 2016-05-26 | 2016-10-26 | 天邦膜技术国家工程研究中心有限责任公司 | A portable water-soluble helium gas-water ratio tester |
| CN107882547B (en) * | 2016-09-29 | 2023-08-04 | 中国石油化工股份有限公司 | Pipeline type high-water-content oil well liquid production three-phase metering device and method |
| CN110082066B (en) * | 2019-05-29 | 2024-07-12 | 天津商业大学 | Flow distribution performance test experiment system influenced by non-uniform heat exchange at downstream |
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1998
- 1998-12-30 CN CN 98113068 patent/CN1085333C/en not_active Expired - Fee Related
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