CN101929884B - Flow measuring device for gas-liquid two-phase fluid and measuring method thereof - Google Patents
Flow measuring device for gas-liquid two-phase fluid and measuring method thereof Download PDFInfo
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- CN101929884B CN101929884B CN2010102490929A CN201010249092A CN101929884B CN 101929884 B CN101929884 B CN 101929884B CN 2010102490929 A CN2010102490929 A CN 2010102490929A CN 201010249092 A CN201010249092 A CN 201010249092A CN 101929884 B CN101929884 B CN 101929884B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
Abstract
The invention discloses a flow measuring device for gas-liquid two-phase fluid and a measuring method thereof. The flow measuring device mainly consists of a horizontal pipeline, a liquid collection box, a gas collection box, a gas flow meter and a liquid flow meter; when flowing through the horizontal pipeline, the gas-liquid two-phase fluid generates natural separation under the action of gravity thereof, i.e. the liquid is deposited on the bottom of the pipeline, and the gas is gathered on the upper part of the pipeline; the liquid is collected into the liquid collection box through the porous wall of the lower part of the pipeline, and then is measured by the liquid flow meter; and simultaneously, part of the gas is collected into the gas collection box through the porous wall of the upper part of the pipeline, then is measured by the gas flow meter, and then is subject to conversion based on the proportional relationship to obtain the total gas flow. By adopting the invention, the separation method is simplified, the volume of the whole measuring device is greatly reduced, the measurement instantaneity is improved, and the automaticity is improved, thus the invention is convenient to be applied to engineering.
Description
Technical field
The invention belongs to the multiphase flow rate field of measuring technique, be specifically related to a kind of flow measurement device and measuring method thereof of gas-liquid two-phase fluid.
Background technology
Traditional gas-liquid two-phase fluid flow-measuring method remains partition method at present, promptly at first adopts a kind of gas-liquid separation equipment that gas-liquid two-phase fluid is separated into single phase gas and liquid, goes out each phase flow rate with the single-phase flow flowmeter measurement respectively then.The advantage of this method is that functional reliability is high, and measurement result and flow pattern are irrelevant, but maximum shortcoming is that equipment is huge, cost is high, automaticity is low and measured real-time property is poor.These shortcomings have seriously limited its widespread use on engineering, and especially along with the increase of fluid line diameter, this shortcoming is just more outstanding.US5390547 " Multiphase flow separation and measurement system " and these two United States Patent (USP)s of US7311001 " Multiphase flow measurement apparatus and method "; A kind of heterogeneous fluid flow-measuring method and device are disclosed; Whole device need not be special separation equipment; Only utilize the heterogeneous fluid pipeline itself to constitute a kind of piece-rate system; Heterogeneous fluid is separated into monophasic fluid, use the flow of each phase of single-phase flow flowmeter measurement then respectively, again they are mixed again at last.On the surface; This method has saved conventional separators really; But because the diameter of steel tube that adopted is very big, and adopted cyclonic separation mode and complicated tank level control system, therefore it and traditional partition method do not have the difference of essence in fact; Main is that this system only is suitable for the less relatively occasion of gas phase flow, is not suitable for the operating mode of high void fraction.Because along with the increase of gas speed, the ability of gas-entrained liquid also constantly increases, and when gas is separated, must have a large amount of liquid and follow gas entering gas piping in pipeline, causes separating failure.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists; The object of the present invention is to provide a kind of flow measurement device and measuring method thereof of gas-liquid two-phase fluid; Dwindled the volume of measurement mechanism significantly; Simplify separation method, improve measured real-time property and improved automaticity, be convenient to widespread use on engineering.
In order to achieve the above object, the technical scheme that the present invention adopted is:
A kind of flow measurement device of gas-liquid two-phase fluid; Comprise gas meter 10 and liquid flowmeter 5; Also comprise horizontal pipe 1; Top-side and bottom sides at horizontal pipe 1 are provided with plenum chamber 6 and liquid collecting box 2 respectively, and are conducted through upper porous wall 7 between the top of the bottom of plenum chamber 6 and horizontal pipe 1, are conducted through bottom porous wall 3 between the bottom of the top of liquid collecting box 2 and horizontal pipe 1; Top-side and bottom sides at horizontal pipe also is provided with top arched door shape inverted-loop tube 9 and bottom invert door shape U-shaped pipe 4 respectively in addition; One end and the plenum chamber 6 of this top arched door shape inverted-loop tube 9 are conducted, and the top of its other end and horizontal pipe 1 is conducted, and an end and the liquid collecting box 2 of this bottom invert door shape U-shaped pipe 4 are conducted; And the bottom of its other end and horizontal pipe 1 is conducted, and top arched door shape inverted-loop tube 9 is separately installed with described gas meter 10 and liquid flowmeter 5 with bottom invert door shape U-shaped pipe 4.
The hole of described bottom porous wall 3 is an equally distributed through hole on bottom porous wall 3, and the aperture of this through hole is below 1/10th of internal diameter of horizontal pipe 1.
The hole of described upper porous wall 7 is equally distributed through hole or a slot on upper porous wall 7, and the aperture of this through hole or the width of slot are below one of the percentage of internal diameter of horizontal pipe 1 but are not less than 2 millimeters.
The madial wall of described horizontal pipe 1 is provided with restricting element 11, and described plenum chamber 6 is positioned at restricting element 11 upper reaches in the position of the top-side of horizontal pipe 1.
The set inside of described plenum chamber 6 has gas averaging board 8.
Gas averaging board 8 is for having the plate of equally distributed through hole, and each through hole diameter is the 3-6 millimeter, and the percentage of open area of through hole on gas averaging board 8 is 0.3-0.6.
The measuring method of the flow measurement device of above-mentioned gas-liquid two-phase fluid: this gas-liquid two-phase fluid flow measurement device is put into the gas-liquid two-phase fluid pipeline that to measure; And it is vertical that the flow direction of the entrance cross-section of its horizontal pipe 1 and the gas-liquid two-phase fluid that will measure keeps, when gas-liquid two-phase fluid flows in horizontal pipe 1, under the effect of gravity; Liquid deposition in the gas-liquid two-phase fluid is in horizontal pipe 1 bottom; Its gas is then assembled in horizontal pipe 1 inner and upper, and gas also can entrainment small amount of liquid from horizontal pipe 1 inner below and gets into the air-flow center in addition, like this when depositing and entrainmenting two kinds of processes when reaching balance; Most of liquid can be deposited on horizontal pipe 1 bottom; Only small amount of drop can be dispersed in the air-flow, subsequently when the liquid of horizontal pipe 1 bottom runs into bottom porous wall 3, constantly in the influent collecting box 2; The balance that deposits this moment and entrainment can be broken; The drop of dispensed in small quantity in air-flow can until all from air-flow, telling, so just have been realized gas-liquid separation constantly to the duct bottom deposition; Liquid after then separating returns in the horizontal pipe 1 after measuring through liquid flowmeter 5 from liquid collecting box 2 entering bottom invert door shape U-shaped pipes 4 again, accomplishes the liquid flow measurement in the gas-liquid two-phase fluid; Meanwhile a part of gas can get into plenum chamber 6 through upper porous wall 7; Arched door shape inverted-loop tube 9 flows through this gas through top at last; And by the flow of gas meter 10 measurement gas in top arched door shape inverted-loop tube 9; Be to return in the horizontal pipe 1 after gas divides the flow q of fluid; Utilize formula
to calculate the gas flow Q in the gas-liquid two-phase fluid, wherein K is a diverting coefficient, and the K value is by the determined constant of the structure of the flow measurement device of gas-liquid two-phase fluid; Q is the flow that gas divides fluid, and Q is the gas flow in the gas-liquid two-phase fluid.
The flow measurement device of gas-liquid two-phase fluid of the present invention and measuring method thereof; Mainly form by horizontal pipe 1, liquid collecting box 2, plenum chamber 6, gas meter 10 and liquid flowmeter 5; When gas-liquid two-phase fluid flows through horizontal pipe; Because the effect of gravity can produce the natural separation phenomenon, liquid can deposit to duct bottom, and gas can be assembled to conduit upper.Through bottom porous wall 3 liquid is collected in the liquid collecting box 2, measured with liquid flowmeter 5 then, through upper porous wall 7 a part of gas is collected plenum chamber 6 simultaneously; Measure with gas meter 10 then; And be converted into the total flow of gas under a proportional relationship, and can realize simplifying separation method through the present invention, dwindle the volume and the purpose of improving measured real-time property of entire measuring device significantly; And can improve automaticity, be convenient to widespread use on engineering.
Description of drawings
Accompanying drawing is the structural representation of the flow measurement device of gas-liquid two-phase fluid of the present invention, the flow direction of the tested gas-liquid two-phase fluid that expression that wherein arrow indicates
is corresponding.
Embodiment
Below in conjunction with accompanying drawing the present invention is done more detailed explanation.
Shown in accompanying drawing; The flow measurement device of gas-liquid two-phase fluid; Comprise gas meter 10 and liquid flowmeter 5, also comprise horizontal pipe 1, plenum chamber 6 and liquid collecting box 2 are set respectively in the top-side and the bottom sides of horizontal pipe 1; And be conducted through upper porous wall 7 between the top of the bottom of plenum chamber 6 and horizontal pipe 1; Be conducted through bottom porous wall 3 between the bottom of the top of liquid collecting box 2 and horizontal pipe 1, top-side and the bottom sides at horizontal pipe also is provided with top arched door shape inverted-loop tube 9 and bottom invert door shape U-shaped pipe 4 respectively in addition, and an end and the plenum chamber 6 of this top arched door shape inverted-loop tube 9 are conducted; And the top of its other end and horizontal pipe 1 is conducted; One end and the liquid collecting box 2 of this bottom invert door shape U-shaped pipe 4 are conducted, and the bottom of its other end and horizontal pipe 1 is conducted, and top arched door shape inverted-loop tube 9 is separately installed with described gas meter 10 and liquid flowmeter 5 with bottom invert door shape U-shaped pipe 4.The hole of described bottom porous wall 3 is an equally distributed through hole on bottom porous wall 3, and the aperture of this through hole is below 1/10th of internal diameter of horizontal pipe 1.The hole of described upper porous wall 7 is equally distributed through hole or a slot on upper porous wall 7, and the aperture of this through hole or the width of slot are below one of the percentage of internal diameter of horizontal pipe 1 but are not less than 2 millimeters.The madial wall of described horizontal pipe 1 is provided with restricting element 11, and described plenum chamber 6 is positioned at restricting element 11 upper reaches in the position of the top-side of horizontal pipe 1.The set inside of described plenum chamber 6 has gas averaging board 8.Gas averaging board 8 is for having the plate of equally distributed through hole, and each through hole diameter is the 3-6 millimeter, and the percentage of open area of through hole on gas averaging board 8 is 0.3-0.6.
The measuring method of the flow measurement device of this gas-liquid two-phase fluid: this biphase gas and liquid flow flow measurement device is put into the gas-liquid two-phase fluid pipeline that to measure; And it is vertical that the flow direction of the entrance cross-section of its horizontal pipe 1 and the gas-liquid two-phase fluid that will measure keeps, when gas-liquid two-phase fluid flows in horizontal pipe 1, under the effect of gravity; Liquid deposition in the gas-liquid two-phase fluid is in horizontal pipe 1 bottom; Its gas is then assembled in horizontal pipe 1 inner and upper, and gas also can entrainment small amount of liquid from horizontal pipe 1 inner below and gets into the air-flow center in addition, like this when depositing and entrainmenting two kinds of processes when reaching balance; Most of liquid can be deposited on horizontal pipe 1 bottom; Only small amount of drop can be dispersed in the air-flow, subsequently when the liquid of horizontal pipe 1 bottom runs into bottom porous wall 3, constantly in the influent collecting box 2; The balance that deposits this moment and entrainment can be broken; The drop of dispensed in small quantity in air-flow can until all from air-flow, telling, so just have been realized gas-liquid separation constantly to the duct bottom deposition; Liquid after then separating returns in the horizontal pipe 1 after measuring through liquid flowmeter 5 from liquid collecting box 2 entering bottom invert door shape U-shaped pipes 4 again, accomplishes the liquid flow measurement in the gas-liquid two-phase fluid; Meanwhile a part of gas can get into plenum chamber 6 through upper porous wall 7; Arched door shape inverted-loop tube 9 flows through this gas through top at last; And by the flow of gas meter 10 measurement gas in top arched door shape inverted-loop tube 9; Be to return in the horizontal pipe 1 after gas divides the flow q of fluid; Utilize formula
to calculate the gas flow Q in the gas-liquid two-phase fluid, wherein K is a diverting coefficient, and the K value is by the determined constant of the structure of the flow measurement device of gas-liquid two-phase fluid; Q is the flow that gas divides fluid, and Q is the gas flow in the gas-liquid two-phase fluid.
The flow measurement device of gas-liquid two-phase fluid of the present invention and measuring method thereof; Mainly form by horizontal pipe 1, liquid collecting box 2, plenum chamber 6, gas meter 10 and liquid flowmeter 5; When gas-liquid two-phase fluid flows through horizontal pipe; Because the effect of gravity can produce the natural separation phenomenon, liquid can deposit to duct bottom, and gas can be assembled to conduit upper.Through bottom porous wall 3 liquid is collected in the liquid collecting box 2, measured with liquid flowmeter 5 then, through upper porous wall 7 a part of gas is collected plenum chamber 6 simultaneously; Measure with gas meter 10 then; And be converted into the total flow of gas under a proportional relationship, and can realize simplifying separation method through the present invention, dwindle the volume and the purpose of improving measured real-time property of entire measuring device significantly; And can improve automaticity, be convenient to widespread use on engineering.And the hole of described bottom porous wall 3 is an equally distributed through hole on bottom porous wall 3, and the aperture of this through hole is below 1/10th of internal diameter of horizontal pipe 1, and such structure can reach better liquid deposition effect.The hole of described upper porous wall 7 is equally distributed through hole or a slot on upper porous wall 7; The aperture of this through hole or the width of slot are below one of the percentage of internal diameter of horizontal pipe 1 but are not less than 2 millimeters that such structure can reach the effect that better capacity gas rises to plenum chamber 6.The madial wall of described horizontal pipe 1 is provided with restricting element 11, and described plenum chamber 6 is positioned at restricting element 11 upper reaches in the position of the top-side of horizontal pipe 1, and such structure can guarantee better gas-liquid separation effect.The set inside of described plenum chamber 6 has gas averaging board 8, and the structure of gas averaging board 8 is convenient to have in the barrier gas drop and is got into plenum chamber 6.Gas averaging board 8 is for having the plate of equally distributed through hole, and each through hole diameter is the 3-6 millimeter, and the percentage of open area of through hole on gas averaging board 8 is 0.3-0.6, and such structure can have drop entering plenum chamber 6 in the more effective barrier gas.
Claims (7)
1. the flow measurement device of a gas-liquid two-phase fluid; Comprise gas meter (10) and liquid flowmeter (5); It is characterized in that: also comprise horizontal pipe (1); Top-side and bottom sides at horizontal pipe (1) are provided with plenum chamber (6) and liquid collecting box (2) respectively; And be conducted through upper porous wall (7) between the top of the bottom of plenum chamber (6) and horizontal pipe (1); Be conducted through bottom porous wall (3) between the bottom of the top of liquid collecting box (2) and horizontal pipe (1), top-side and the bottom sides at horizontal pipe also is provided with top arched door shape inverted-loop tube (9) and bottom invert door shape U-shaped pipe (4) respectively in addition, and an end of this top arched door shape inverted-loop tube (9) and plenum chamber (6) are conducted; And the top of its other end and horizontal pipe (1) is conducted; One end of this bottom invert door shape U-shaped pipe (4) and liquid collecting box (2) are conducted, and the bottom of its other end and horizontal pipe (1) is conducted, and top arched door shape inverted-loop tube (9) and bottom invert door shape U-shaped pipe (4) are separately installed with described gas meter (10) and liquid flowmeter (5).
2. the flow measurement device of gas-liquid two-phase fluid according to claim 1; It is characterized in that: the hole of described bottom porous wall (3) is that porous wall (3) is gone up equally distributed through hole in the bottom, and the aperture of this through hole is below 1/10th of internal diameter of horizontal pipe (1).
3. according to the flow measurement device of claim 1 or the described gas-liquid two-phase fluid of claim 2; It is characterized in that: the hole of described upper porous wall (7) is for going up equally distributed through hole or slot at upper porous wall (7), and the aperture of this through hole or the width of slot are below one of the percentage of internal diameter of horizontal pipe (1) but are not less than 2 millimeters.
4. according to the flow measurement device of claim 1 or the described gas-liquid two-phase fluid of claim 2; It is characterized in that: the madial wall of described horizontal pipe (1) is provided with restricting element (11), and described plenum chamber (6) is positioned at restricting element (11) upper reaches in the position of the top-side of horizontal pipe (1).
5. according to the flow measurement device of claim 1 or the described gas-liquid two-phase fluid of claim 2, it is characterized in that: the set inside of described plenum chamber (6) has gas averaging board (8).
6. the flow measurement device of gas-liquid two-phase fluid according to claim 5 is characterized in that: gas averaging board (8) is for having the plate of equally distributed through hole, and each through hole diameter is the 3-6 millimeter, and the percentage of open area of through hole on gas averaging board (8) is 0.3-0.6.
7. measuring method that adopts the flow measurement device of the described gas-liquid two-phase fluid of claim 1: this gas-liquid two-phase fluid flow measurement device is put into the gas-liquid two-phase fluid pipeline that to measure; And the entrance cross-section of its horizontal pipe (1) keeps vertical with the flow direction of the gas-liquid two-phase fluid that will measure, when gas-liquid two-phase fluid flows in horizontal pipe (1), under the effect of gravity; Liquid deposition in the gas-liquid two-phase fluid is in horizontal pipe (1) bottom; Its gas is then assembled in horizontal pipe (1) inner and upper, and gas also can entrainment small amount of liquid from the inner below of horizontal pipe (1) and gets into the air-flow center in addition, like this when depositing and entrainmenting two kinds of processes when reaching balance; Most of liquid can be deposited on horizontal pipe (1) bottom; Only small amount of drop can be dispersed in the air-flow, subsequently when the liquid of horizontal pipe (1) bottom runs into bottom porous wall (3), constantly in the influent collecting box (2); The balance that deposits this moment and entrainment can be broken; The drop of dispensed in small quantity in air-flow can until all from air-flow, telling, so just have been realized gas-liquid separation constantly to the duct bottom deposition; Liquid after then separating gets into bottom invert door shape U-shaped pipe (4) from liquid collecting box (2), passes through and returns in the horizontal pipe (1) after liquid flowmeter (5) is measured, and accomplishes the liquid flow measurement in the gas-liquid two-phase fluid; Meanwhile a part of gas can get into plenum chamber (6) through upper porous wall (7); Arched door shape inverted-loop tube (9) flows through this gas through top at last; And by the flow of gas meter (10) measurement gas in top arched door shape inverted-loop tube (9); Be to return in the horizontal pipe (1) after gas divides the flow q of fluid; Utilize formula
to calculate the gas flow Q in the gas-liquid two-phase fluid; Wherein K is a diverting coefficient; The K value is by the determined constant of the structure of the flow measurement device of gas-liquid two-phase fluid, and q is the flow that gas divides fluid, and Q is the gas flow in the gas-liquid two-phase fluid.
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| WO2016045918A1 (en) * | 2014-09-25 | 2016-03-31 | Endress+Hauser Flowtec Ag | Measuring assembly for determining the flow speed of a fluid having a liquid phase and a gaseous phase |
| WO2021155415A1 (en) * | 2020-02-04 | 2021-08-12 | Avl List Gmbh | Separation system for a fuel cell system |
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| CN1120981C (en) * | 1999-12-29 | 2003-09-10 | 西安交通大学 | Measuring method of crude petroleum, natural gas and water multiphase flow and its measuring equipment |
| CN100369653C (en) * | 2005-12-13 | 2008-02-20 | 中国石油化工股份有限公司 | Oil gas absorptive reclaiming method and apparatus |
| JP2008128825A (en) * | 2006-11-21 | 2008-06-05 | Toshiba Corp | Ultrasonic flowmeter |
| CN100458269C (en) * | 2007-03-29 | 2009-02-04 | 大庆油田有限责任公司 | Oil-gas multi-phase mixed delivering pump inlet flow-harmonization device |
| CN201809323U (en) * | 2010-10-14 | 2011-04-27 | 中国石油天然气股份有限公司 | Tube bundle natural gas separation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016045918A1 (en) * | 2014-09-25 | 2016-03-31 | Endress+Hauser Flowtec Ag | Measuring assembly for determining the flow speed of a fluid having a liquid phase and a gaseous phase |
| WO2021155415A1 (en) * | 2020-02-04 | 2021-08-12 | Avl List Gmbh | Separation system for a fuel cell system |
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