CN105181384A - Gas-liquid two-phase fluid proportional sampler - Google Patents
Gas-liquid two-phase fluid proportional sampler Download PDFInfo
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- CN105181384A CN105181384A CN201510674122.3A CN201510674122A CN105181384A CN 105181384 A CN105181384 A CN 105181384A CN 201510674122 A CN201510674122 A CN 201510674122A CN 105181384 A CN105181384 A CN 105181384A
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Abstract
The invention relates to a gas-liquid two-phase fluid proportional sampler. The gas-liquid two-phase fluid proportional sampler mainly comprises a fluid dividing pipe, a main fluid collection chamber, a sampled fluid collection chamber, a main fluid outlet pipe, a sampled fluid outlet pipe, a cyclone and a differential pressure gauge, wherein sampled fluid is uniformly divided through fluid dividing ports formed in a pipe wall, and the flow characteristics of all fluid dividing ports are enabled to be fully consistent through inlet flow pattern adjustment and resistance adjustment. A division ratio only depends on a ratio of the number of the sampled fluid dividing ports to the total number of the fluid dividing ports. Compared with the existing gas-liquid two-phase fluid sampling device, the gas-liquid two-phase fluid proportional sampler has the advantages that the size is small, the structure is compact, the sampling ratio can be freely adjusted, the sampled fluid has the same gas-liquid components as the main fluid, and no influence is caused by parameters such as an inlet gas-liquid flow rate and a flow pattern.
Description
Technical field
The invention belongs to fluid and distribute field, particularly relate to a kind of proportional sampler for biphase gas and liquid flow uniform sampling.
Background technology
Biphase gas and liquid flow is extensively present in many industrial circles such as oil, chemical industry, nuclear energy.In the system that there is gas liquid two-phase flow, usually need to sample to biphase gas and liquid flow the composition analyzing two-phase fluid, even measure biphase gas and liquid flow flow by fluid sampling.But when gas-liquid two-phase flows through sampler, the liquid phase ratio entering stopple coupon usually forms with the gas-liquid in sampled pipeline and occurs difference, so-called liquid phase segregation phenomenon that Here it is.Numerous experimental shows, biphase gas and liquid flow sampling characteristic not only depends on dispensing arrangement, also closely related with each divider upstream and downstream flow parameter.Even if it is identical and install complete symmetry to distribute channel architecture, distribute if each that the distribution of feeder connection liquid phase is different or downstream each bye-pass drag characteristic is inconsistent also can be separated.
For realizing uniform sampling, the people such as Wang Dong propose a kind of sampling tubular type sampler (Wang Dong, Lin Yi, Lin Zonghu. sampling cast shunting split-phase type biphase gas and liquid flow flowmeter body [J]. Engineering Thermophysics journal, 2002,23 (2): 235-237).Stopple coupon is positioned at main pipe, and sample tap is just to carrying out flow path direction, and stopple coupon upstream is provided with mixer.First gas-liquid two-phase fluid carries out accelerating, mixing in mixer, enters sample tap subsequently.There is subject matter in it, sample tap, just to gas-liquid incoming flow, easily causes sample tap to block.In addition, owing to being difficult to meet isokinetic sampling condition, sampling ratio is difficult to keep constant.
In order to overcome the defect of prior art, the present invention proposes a kind of novel gas-liquid two-phase flow proportional sampler, sampled fluid carries out uniform divided flows by the tap hole being arranged on tube wall, by entrance flow pattern adjustment and each tap hole flow characteristics of resistance regulating guarantee completely the same, sampling ratio only depends on that sampled fluid tap hole accounts for the ratio of total tap hole number.Compared with existing biphase gas and liquid flow sampler, it is little that the present invention has volume, compact conformation, and sampling ratio can arbitrarily regulate, and by entrance liquid phase flow velocity, flow pattern is isoparametric affects, and can maintain constant feature in the gas of broadness, flow quantity scope.
Summary of the invention
The present invention mainly comprises isocon, main fluid collecting chamber, sampled fluid collecting chamber, primary fluid outlet pipe, sampled fluid outlet, cyclone and differential pressure gauge, the tube wall of isocon is furnished with several tap holes running through tube wall, cyclone is arranged in the upstream of tap hole in isocon, and the lower exit of isocon is closed by blind plate; Main fluid collecting chamber is arranged in the outer rim of isocon, sampled fluid collecting chamber is arranged in the outer rim of main fluid collecting chamber, primary fluid outlet pipe is connected with main fluid collecting chamber, sampled fluid outlet is connected with sampled fluid collecting chamber, tap hole on isocon is made up of sampled fluid tap hole and main fluid tap hole two parts, sampled fluid tap hole is connected with sampled fluid collecting chamber by stopple coupon, and main fluid tap hole is directly connected with main fluid collecting chamber.
The structure of several described tap holes is identical, and be all positioned at on the same plane of the central axis upright of isocon, number is not less than 2, and the even tube wall along isocon is arranged.
Described cyclone is made up of central shaft and helical blade, and the outer rim of helical blade and the inwall of isocon keep fitting.
Two pressure guiding pipes of described differential pressure pick-up are connected with sampled fluid collecting chamber with main fluid collecting chamber respectively.
Described primary fluid outlet pipe is provided with main fluid resistance control valve, sampled fluid outlet is provided with sampled fluid resistance control valve.
Compared with prior art, the present invention has following beneficial effect:
(1) sampling ratio only depends on that sampled fluid tap hole accounts for the ratio of total tap hole, can regulate arbitrarily as required;
(2) under cyclone effect, different flow pattern changes the equally distributed annular flow of liquid film into, eliminates flow pattern of gas-liquid two-phase flow fluctuation to the impact of measuring;
(3) each tap hole flow characteristics is identical, and sampled fluid and main pipeline have on all four liquid phase and form, and eliminates being separated in conventional two-phase flow sampler;
(4) movement-less part, Maintenance free and demarcation, have composition simple, the feature such as to produce and operating cost is low, easy to operate.
Accompanying drawing illustrates:
Fig. 1 is that the present invention forms schematic diagram;
Fig. 2 is A-A schematic cross-section of the present invention;
Fig. 3 is rectifier structure schematic diagram;
Fig. 4 is flow pattern of gas-liquid two-phase flow adjustment schematic diagram;
Fig. 5 is fundamental diagram of the present invention;
Gas, liquid sampling ratio experimental result when Fig. 6 gas phase flow velocity is 5.0m/s;
Gas, liquid sampling ratio experimental result when Fig. 7 gas phase flow velocity is 10.0m/s.
Embodiment:
As shown in Figure 1, the present invention mainly comprises isocon 1, main fluid collecting chamber 2, sampled fluid collecting chamber 3, primary fluid outlet pipe 4, sampled fluid outlet 5, cyclone 6 and differential pressure gauge 7, the tube wall of isocon 1 is furnished with several tap holes 8 running through tube wall, cyclone 6 is arranged in the upstream being positioned at tap hole 8 in isocon 1, and the lower exit of isocon 1 is closed by blind plate 9; Main fluid collecting chamber 2 is arranged in the outer rim of isocon 1, and sampled fluid collecting chamber 3 is arranged in the outer rim of main fluid collecting chamber 2, and primary fluid outlet pipe 4 is connected with main fluid collecting chamber 2, and sampled fluid outlet 5 is connected with sampled fluid collecting chamber 3.
As shown in Figure 2, tap hole 8 on isocon 1 is made up of sampled fluid tap hole 11 and main fluid tap hole 12 two parts, sampled fluid tap hole 11 is connected with sampled fluid collecting chamber 3 by stopple coupon 10, and main fluid tap hole 12 is directly connected with main fluid collecting chamber 2.
As shown in Figure 1 and Figure 2, the structure of several described tap holes 8 is identical, and be all positioned at on the same plane of the central axis upright of isocon 1, number is not less than 2, and the even tube wall along isocon 1 is arranged.
As shown in Figure 3, described cyclone 6 is made up of central shaft 15 and helical blade 16, and the outer rim of helical blade 16 and the inwall of isocon 1 keep fitting.
As shown in Figure 1, two pressure guiding pipes of described differential pressure pick-up 7 are connected with sampled fluid collecting chamber 3 with main fluid collecting chamber 2 respectively.
As shown in Figure 1, described primary fluid outlet pipe 4 is provided with main fluid resistance control valve 13, sampled fluid outlet 5 is provided with sampled fluid resistance control valve 14.
Principle of work of the present invention is described as follows:
As shown in Figure 5, cyclone 6 is arranged in the inside of isocon 1, and the central shaft 15 of cyclone 6 is wound with swirl vane 16, and the outer rim of swirl vane 16 keeps and the inwall of isocon 1 keeps laminating.When gas-liquid two-phase flows through cyclone 6, the helical flow path being forced to be formed along swirl vane 16 and inwall and the central shaft 15 of isocon 1 flows, thus rotates.Because density of liquid phase is much larger than density of gas phase, under the centrifugal action rotating generation, liquid is thrown toward inside pipe wall, form liquid film 17 and against tube wall flowing, and gas flows at tube hub.
For the horizontal pipe of acylic motion device, under gravity, gas-liquid presents obvious asymmetry in tube section distribution, and bottom liquid phases is more, and gas phase mainly concentrates on the top of isocon 1.When there is swirl-flow devices, as shown in Figure 4, after cyclone 6, stratified flow, wave flow, semicircular stream, asymmetric annular flow equal flow type are all adjusted to liquid film 17 along pipe week equally distributed ring-type flow pattern.
Gas-liquid two-phase continues to isocon 1 downstream flow after flowing through cyclone 6, because isocon 1 end is closed by blind plate 9, gas-liquid two-phase incoming flow is all shunted by the tap hole be arranged on isocon tube wall: a part by main fluid tap hole 12, and then enters main fluid collecting chamber 2; Another part enters sampled fluid tap hole 11, enters sampled fluid collecting chamber 3 subsequently.
The total indicator reading observing differential pressure gauge 7 judges that whether main fluid collecting chamber 2 is identical with the pressure of sampled fluid collecting chamber 3, as the not identical aperture then adjusting the main fluid resistance control valve 13 on primary fluid outlet pipe 4 and the resistance control valve 14 on sampled fluid outlet 5, until differential pressure gauge reading is 0.As shown in Figure 1, main fluid tap hole 12 is connected with main fluid collecting chamber 2, sampled fluid tap hole 11 is connected with sampled fluid collecting chamber 3, if the pressure of main fluid collecting chamber 2 and sampled fluid collecting chamber 3 is equal, then show that main fluid tap hole 12 is equal with sampled fluid tap hole 11 top hole pressure.
The liquid phase flow entering tap hole 8 depends on differential pressure before and after the liquid phase distribution of tap hole 8 porch and tap hole 8.Because each tap hole 8 is on same cross section, its inlet pressure is equal, and by the adjustment of resistance control valve 13 and resistance control valve 14, the top hole pressure of each tap hole 8 is also consistent.In addition, under the effect of cyclone 6, each tap hole 8 porch gas-liquid distribution is also identical.Thus the gas, liquid flow entering each tap hole is identical, and the flow characteristics of each tap hole 8 is completely the same.
Enter sampled fluid collecting chamber 3 by the gas-liquid mixture of sampled fluid tap hole 11 by stopple coupon 10, flowed out by sampled fluid outlet 5 after sampled fluid collecting chamber 3 collects.Directly enter main fluid collecting chamber 2 by the gas-liquid mixture of main fluid tap hole 12, and then flowed out by primary fluid outlet pipe 4.
Because the flow characteristics of each tap hole 8 is identical, the gas phase mass flow of sampled fluid and liquid phase quality flow only depend on that sampled fluid tap hole 11 accounts for the ratio of total tap hole 8.Definition sampling ratio is the ratio that sampled fluid accounts for upstream gas liquid mixture mass rate.If the number of total tap hole 8 is N, sampled fluid tap hole 11 number is n, then sampling ratio K can calculate with following formula:
K＝n/N(1)
Because the gas-liquid flow entering each tap hole is identical, then gas phase sampling ratio K
gwith liquid phase sampling ratio K
lalso identical, namely
K
G＝K
L＝n/N(2)
Visible liquid phase sampling ratio only depends on that the number of sampled fluid tap hole 11 accounts for the ratio of total tap hole 8 number, by changing the number of total tap hole 8 and sampled fluid tap hole 11, can realize desired sampling ratio.
Fig. 6, Fig. 7 are when the number of sampled fluid tap hole 11 is 3, liquid phase diverting coefficient experimental result when the number of total tap hole 8 is 18.According to formula (1), as divided fluid stream number of perforations n=3, during total tap hole number N=18, theoretical sampling ratio is 0.167.When Fig. 6 is gas superficial velocity maintenance 5.0m/s, gas phase sampling ratio K
gwith liquid phase sampling ratio K
lwith liquid phase specific speed change curve.As can be seen from the figure, gas, liquid sampling ratio substantially identical and with theoretical value closely, maximum error is less than 5%.Fig. 7 is that gas superficial velocity keeps 10.0m/s, gas phase sampling ratio K
gwith liquid phase sampling ratio K
lwith liquid phase specific speed change curve.Can find that gas, liquid sampling ratio is close to theoretical value equally.Can find out that gas, liquid sampling ratio of the present invention does not change with the change of liquid phase specific speed from experimental result, can remain stable in the flow range of broadness.
To sum up, when gas-liquid two-phase flows through of the present invention, sampling ratio only depends on that sampled fluid tap hole accounts for the ratio of total tap hole, does not affect, have applicability widely by factors such as pipeline liquid phase flow pattern, liquid phase flow velocitys.
Claims (5)
1. the present invention relates to a kind of biphase gas and liquid flow proportional sampler, it is characterized in that, mainly comprise: isocon (1), main fluid collecting chamber (2), sampled fluid collecting chamber (3), primary fluid outlet pipe (4), sampled fluid outlet (5), cyclone (6) and differential pressure gauge (7), the tube wall of isocon (1) is furnished with several tap holes (8) running through tube wall, cyclone (6) is arranged in the upstream of isocon (1) interior tap hole (8), the lower exit of isocon (1) is closed by blind plate (9), main fluid collecting chamber (2) is arranged in the outer rim of isocon (1), sampled fluid collecting chamber (3) is arranged in the outer rim of main fluid collecting chamber (2), primary fluid outlet pipe (4) is connected with main fluid collecting chamber (2), sampled fluid outlet (5) is connected with sampled fluid collecting chamber (3), tap hole (8) on isocon (1) is made up of sampled fluid tap hole (11) and main fluid tap hole (12) two parts, sampled fluid tap hole (11) is connected with sampled fluid collecting chamber (3) by stopple coupon (10), main fluid tap hole (12) is directly connected with main fluid collecting chamber (2).
2. a kind of biphase gas and liquid flow proportional sampler according to claim 1, it is characterized in that: the structure of described several tap holes (8) is identical, all be positioned at on the same plane of the central axis upright of isocon (1), number is not less than 2, and the even tube wall along isocon (1) is arranged.
3. a kind of biphase gas and liquid flow proportional sampler according to claim 1, it is characterized in that: described cyclone (6) is made up of central shaft (15) and helical blade (16), the outer rim of helical blade (16) and the inwall of isocon (1) keep fitting.
4. a kind of biphase gas and liquid flow proportional sampler according to claim 1, is characterized in that: two pressure guiding pipes of described differential pressure pick-up (7) are connected with sampled fluid collecting chamber (3) with main fluid collecting chamber (2) respectively.
5. a kind of biphase gas and liquid flow proportional sampler according to claim 1, it is characterized in that: described primary fluid outlet pipe (4) is provided with main fluid resistance control valve (13), sampled fluid outlet (5) is provided with sampled fluid resistance control valve (14).
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| CN201510674122.3A CN105181384B (en) | 2015-10-16 | 2015-10-16 | A kind of biphase gas and liquid flow proportional sampler |
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| CN201510674122.3A CN105181384B (en) | 2015-10-16 | 2015-10-16 | A kind of biphase gas and liquid flow proportional sampler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107843307A (en) * | 2017-10-16 | 2018-03-27 | 中国石油大学(华东) | A kind of spliced gas-liquid two-phase flow metering device |
| CN108896353A (en) * | 2018-08-06 | 2018-11-27 | 长沙有色冶金设计研究院有限公司 | A kind of cyclone feed and underflow sampling method and corresponding sampling instrument |
| CN109323488A (en) * | 2018-09-03 | 2019-02-12 | 上海科凌能源科技有限公司 | A kind of current divider for realizing uniform and stable shunting based on annular flow rectification |
| CN110180220A (en) * | 2018-02-22 | 2019-08-30 | 中国石油化工股份有限公司 | Biphase gas and liquid flow distributes control device and method |
| CN112554877A (en) * | 2020-12-08 | 2021-03-26 | 中国石油大学(华东) | Multi-phase metering sampling device with adjustable shunt ratio |
| CN112577562A (en) * | 2020-12-08 | 2021-03-30 | 中国石油大学(华东) | Scraper type gas-liquid two-phase flow proportional sampler |
| CN114441241A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Equal kinetic energy sampling device and method for oil well produced liquid |
| RU2825367C1 (en) * | 2024-01-11 | 2024-08-26 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Sampler |
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| CN201554460U (en) * | 2009-11-07 | 2010-08-18 | 兰州海默科技股份有限公司 | Multiphase flow gas real-time on-line dedicated gas sample collector |
| CN104790946B (en) * | 2015-03-12 | 2017-09-26 | 中国石油天然气股份有限公司 | Oil well wellhead sampling device |
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- 2015-10-16 CN CN201510674122.3A patent/CN105181384B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107843307A (en) * | 2017-10-16 | 2018-03-27 | 中国石油大学(华东) | A kind of spliced gas-liquid two-phase flow metering device |
| CN107843307B (en) * | 2017-10-16 | 2021-06-22 | 中国石油大学(华东) | Splicing type gas-liquid two-phase flow metering device |
| CN110180220A (en) * | 2018-02-22 | 2019-08-30 | 中国石油化工股份有限公司 | Biphase gas and liquid flow distributes control device and method |
| CN110180220B (en) * | 2018-02-22 | 2024-02-02 | 中国石油化工股份有限公司 | Gas-liquid two-phase flow distribution control device and method |
| CN108896353A (en) * | 2018-08-06 | 2018-11-27 | 长沙有色冶金设计研究院有限公司 | A kind of cyclone feed and underflow sampling method and corresponding sampling instrument |
| CN109323488A (en) * | 2018-09-03 | 2019-02-12 | 上海科凌能源科技有限公司 | A kind of current divider for realizing uniform and stable shunting based on annular flow rectification |
| CN114441241A (en) * | 2020-10-30 | 2022-05-06 | 中国石油化工股份有限公司 | Equal kinetic energy sampling device and method for oil well produced liquid |
| CN112554877A (en) * | 2020-12-08 | 2021-03-26 | 中国石油大学(华东) | Multi-phase metering sampling device with adjustable shunt ratio |
| CN112577562A (en) * | 2020-12-08 | 2021-03-30 | 中国石油大学(华东) | Scraper type gas-liquid two-phase flow proportional sampler |
| RU2825367C1 (en) * | 2024-01-11 | 2024-08-26 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Sampler |
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| CN105181384B (en) | 2016-08-17 |
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