CN105318924B - Gas-liquid/stream-liquid two-phase flow Flow Measuring System and measurement method - Google Patents
Gas-liquid/stream-liquid two-phase flow Flow Measuring System and measurement method Download PDFInfo
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- CN105318924B CN105318924B CN201410361976.1A CN201410361976A CN105318924B CN 105318924 B CN105318924 B CN 105318924B CN 201410361976 A CN201410361976 A CN 201410361976A CN 105318924 B CN105318924 B CN 105318924B
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Abstract
The present invention relates to gas-liquid/stream-liquid two-phase flow Flow Measuring System and measurement methods.The measuring system includes: inlet duct, the gas-liquid/vapor-liquid separating device being connected with inlet duct and the gas/vapor body flow measurement pipeline and liquid flow measurement pipeline that are connected respectively with gas-liquid/vapor-liquid separating device top and bottom.Gas-liquid/vapor-liquid separating device gas-liquid/vehicle repair major inflow entrance is higher than the initial liquid level in gas-liquid/vapor-liquid separating device, and liquid flow measurement pipeline includes being provided at least one fluid-tight section and liquid flow measurement pipeline for the resistance in gas/vapor body flow measurement pipeline to be adjusted according to the gas-liquid in the inlet duct/stream-liquid two-phase flow fluid parameter to keep the resistance in gas/vapor body flow measurement pipeline to be less than the dragulator of the resistance in liquid flow measurement pipeline.Measuring system and measurement method of the invention can ensure to realize under the conditions of various pressure, temperature and uninterrupted the flow measurement of degree of precision.
Description
Technical field
The present invention relates to two-phase flow measurement technologies.Specifically, the present invention relates to one kind for passive reactor core it is cold
But the gas-liquid of system/stream-liquid two-phase flow Flow Measuring System and gas-liquid/stream-liquid two-phase flow flow-measuring method.
Background technique
Gas-liquid/stream-liquid two-phase flow is prevalent in the operational process of passive core cooling system.Gas-liquid/vehicle repair major
The flow of stream is one of most important parameter in two phase flow, is to grasp gas-liquid/vapour-liquid to the flow measurement of gas-liquid/stream-liquid two-phase flow
Basic means of two phase flow rule and there are significances and value for the operation of passive core cooling system.
Gas-liquid/stream-liquid two-phase flow is measured, not only content is various but also has very due to flow process complexity compared to monophasic fluid
Mostly new feature.Especially because there are miscellaneous nowed formings for gas-liquid/stream-liquid two-phase flow, such as gas in pipeline
There can be a variety of nowed formings including bubble stream for liquid/vapour-liquid system, thus can be brought much to the measurement of parameter
Problem.Although in recent ten years, having carried out a large amount of research work for the measurement problem of two phase flow both at home and abroad, to being at present
It can only guarantee that the method for degree of precision is very few.
Orifice flowmeter is mainly used to the flow measurement of two phase flow at present, vortex-shedding meter, utilizes elbow measurement and benefit
The mode measured with Pitot tube.But on the one hand there is the strong depend-ences to nowed forming for the above measurement method, separately
On the one hand the correction factor dependent on measurement test, and precision is lower.
In addition, of different sizes according to relative discharge, gas-liquid/stream-liquid two-phase flow can be roughly divided into small flow gas-liquid/
Stream-liquid two-phase flow and big flow gas-liquid/stream-liquid two-phase flow.For those skilled in the art, so-called small flow gas
Liquid/stream-liquid two-phase flow refers to that the mass flow due to the first phase in two phase flow is less than the quality stream of the second phase in two phase flow
Such as the 10% of amount, the mass flow so as to cause the second phase in two phase flow is smaller and the case where be difficult to precise measurement.And it is big
Flow gas-liquid/stream-liquid two-phase flow is then so-called big flow gas-liquid/vapour for small flow gas-liquid/stream-liquid two-phase flow
Liquid two-phase refers to that the mass flow of the first phase in two phase flow is greater than the mass flow of the second phase in two phase flow for example
50% the case where.Prior art gas-liquid/stream-liquid two-phase flow flow measurement device and measurement method mostly can only the small flows of precise measurement
The flow of gas-liquid/stream-liquid two-phase flow flow or big flow single phase gas/steam and big flow single-phase liquid can not be suitable for standard
Really measure the two phase flow of each range of flow, narrow application range；Prior art gas-liquid/stream-liquid two-phase flow flow measurement device and
Measurement method is not capable of measuring instantaneous flow, and there are hesitations；Prior art gas-liquid/stream-liquid two-phase flow flow measurement device and survey
Amount method can only handle the gas-liquid/vapor-water ratio flow being confined within the scope of some and not can guarantee measurement accuracy.
Therefore, those skilled in the art needs a kind of the new of the shortcomings that capable of overcoming in the presence of the above prior art
Type gas-liquid/stream-liquid two-phase flow Flow Measuring System and measurement method, to which passive core cooling system can be preferably applied to.
Summary of the invention
The main object of the present invention is the design needs based on passive core cooling system, and providing one kind can be various
Ensure to realize gas-liquid/vapour of gas-liquid/stream-liquid two-phase flow flow measurement of degree of precision under the conditions of pressure, temperature and uninterrupted
Liquid two-phase Flow Measuring System and gas-liquid/stream-liquid two-phase flow flow-measuring method.
Unless special circumstances have other limitations, otherwise following definition is suitable for term used in this specification.
In addition, unless otherwise defined, otherwise the meaning of all scientific and technical terminologies used herein with it is of the art
It is the same that technical staff, which is generally understood,.If conflict occurs, be subject to this specification and its including definition.
For the present invention, some terms used in this application are defined as follows:
" orifice flowmeter " refers to standard orifice plate and multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter
And pressure transmitter) mating composition high range than differential flow device, can measure gas, steam, liquid and the flow drawn, extensively
General process control and measurement applied to fields such as petroleum, chemical industry, metallurgy, electric power, heat supply, water supply.Orifice flowmeter measurement
Repeatability, accuracy belong to medium level in flow sensor, and since the influence of many factors is intricate, accuracy is difficult to
It improves.
" vortex-shedding meter " refers to a kind of flow measurement device researched and produced according to toll bar (Karman) vortex street principle, main
It is used for the flow measurement of industrial pipeline medium fluid, such as a variety of media of gas, liquid, steam.
" pitot tube flowmeter " refers to that a curved double-layer hollow at right angle answers platform bone, has multiple pressure ports, can be simultaneously
Measure fluid stagnation pressure and static pressure.It is matched with differential pressure transmitter, Flow Measurement Display Meter.It petrochemical industry, metallurgy, power plant,
It is widely used in the production process of the industries such as electric power, light textile, flow survey is carried out to fluids such as gas, liquid, steam, water, air quantity
Amount.
" lyophoby (water) case " refers to such a device, i.e., liquid (water) is placed in a relatively closed container and is added
Heat makes to fill single-phase liquid (water) steam inside container, and volume and diameter are all larger than the line size of U-shaped liquid (water) envelope section,
It seals the baffle-box of section as liquid (water), impact of the liquid to liquid (water) envelope section when for alleviating big flow, it is also possible to come accurate
Measure the operating condition of the small flow of liquid.
" interlocked control valve " refers to used a kind of automatic adjustment valve in the industrial production, the automatic regulating valve
Door is to control executing agency according to the given logical condition of technique.As long as some is associated, there are logical condition connections
Special process parameter change, issue signal, will trigger its auto-action, execute technique order.To reach technique
Preset state is produced with guarantee and is in a kind of scheduled safe condition, and the optimum operation to guarantee technique or part are very
To whole start and stop.
As used herein, the specific direction on directional terminology "upper", "lower" and Figure of description paper is consistent with
's.Succession term " before ", " later " and fluid gas-liquid of the invention/stream-liquid two-phase flow Flow Measuring System or gas-liquid/
What the sequencing in stream-liquid two-phase flow flow-measuring method was consistent with.Term " vertical ", " longitudinal direction " refer to attached in specification
Generally vertical direction on drawing face；And " transverse direction ", "horizontal" refer to substantially horizontal side on Figure of description paper
To.
As used herein, term " about " is exponential quantity, size, formula, parameter and other quantity and characteristic is inaccurate
And need not be accurate value, but can be approximate with exact value and/or be more than or less than exact value, allow to reflect
Deviation, measurement error etc. and the known other factors of those skilled in the art.
When this paper is short with " those skilled in the art is known " when describing material, method or mechanical equipment
When language or synonymous word or phrase, which indicates that the material, method and machine equipment are normal when submitting present patent application
Rule, and including in this specification.It is likewise covered by the description, it is unconventional at present but similar when being suitable for
Fields generally acknowledged material, method and machinery will be become when purpose.
As used herein, term "comprising", " containing ", " comprising ", " covering ", " having " or any other synonym or it
Any other modification refer both to nonexcludability include.E.g., including the technique of specific factor list, method, product are set
It is standby to be not necessarily limited to those elements specifically listed, but may include other not expressly listed elements or such technique, side
Method, product or the intrinsic element of equipment.
Term " Consists of ", " by ... constitute " or any other synonym or their any other modification refer both to it is exclusive
Property includes.For example, the technique being made of specific factor, method, product or equipment are only limitted to those elements specifically listed.
Specifically, above-mentioned purpose to realize the present invention and that the technical solutions adopted are as follows is described:
1. a kind of gas-liquid/stream-liquid two-phase flow Flow Measuring System (1), the gas-liquid/stream-liquid two-phase flow Flow Measuring System
Include: inlet duct (2), the gas-liquid/vapor-liquid separating device (3) being connected with the inlet duct and respectively with the gas-liquid/
The top and bottom of vapor-liquid separating device connected gas/vapor body flow measurement pipeline (4) and liquid flow measurement pipeline (8),
It is characterized in that,
The gas-liquid of the gas-liquid/vapor-liquid separating device/vehicle repair major inflow entrance is higher than in the gas-liquid/vapor-liquid separating device
Initial liquid level, the liquid flow measurement pipeline includes at least one fluid-tight section (10) and the liquid flow measurement pipeline
Be provided with for according to the gas-liquid in the inlet duct/stream-liquid two-phase flow fluid parameter to the gas/vapor body flow measurement
Resistance in pipeline is adjusted to keep the resistance in the gas/vapor body flow measurement pipeline to measure less than the liquid flow
The dragulator (9) of resistance in buret road.
2. gas-liquid according to technical solution 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that in the gas
Lyophoby case (6) are set after liquid/vapor-liquid separating device and before the fluid-tight section, and are set on liquid flow measurement pipeline
Lyophoby case liquidometer interlocked control valve (11) is set, to keep the fluid-tight validity of the fluid-tight section.
3. the gas-liquid according to technical solution 1 or 2/stream-liquid two-phase flow Flow Measuring System, which is characterized in that described
Gas/vapor body flow measurement pipeline (4) and/or the liquid flow measurement pipeline (8) are multiple-way duct in parallel.
4. gas-liquid according to technical solution 3/stream-liquid two-phase flow Flow Measuring System, which is characterized in that the parallel connection
Multiple-way duct in per pipeline all the way above be designed with valve and flowmeter.
5. gas-liquid according to technical solution 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that described in generation
The initial liquid measure of initial liquid level is within the scope of the gas-liquid/vapor-liquid separating device volume 15%-50%.
6. gas-liquid according to technical solution 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that the gas
Liquid/vapor-liquid separating device is gravity-type gas-liquid/vapor-liquid separating device, centrifugal type gas-liquid/vapor-liquid separating device or choked flow type gas
Liquid/vapor-liquid separating device.
7. a kind of gas-liquid/stream-liquid two-phase flow flow-measuring method, which is characterized in that the gas-liquid/stream-liquid two-phase flow flow
Measurement method includes:
Gas-liquid/stream-liquid two-phase flow Flow Measuring System (1) as described in any one of preceding solution 1-6 is provided；
Gas-liquid/stream-liquid two-phase flow fluid is set to enter the gas-liquid/vapor-liquid separating device (3) via the inlet duct (2)
Middle progress gas-liquid/vapor-liquid separation；
The gas/vapor body isolated measures gas/vapor body flow via the gas/vapor body flow measurement pipeline (4)；
The liquid isolated measures fluid flow via the liquid flow measurement pipeline (8).
8. the gas-liquid according to technical solution 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that according to described
Gas-liquid/stream-liquid two-phase flow fluid parameter in inlet duct surveys the gas/vapor body flow using the dragulator (9)
Resistance in buret road is adjusted to keep the resistance in the gas/vapor body flow measurement pipeline to be less than the fluid flow
Measure the resistance in pipeline.
9. the gas-liquid according to technical solution 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that the gas
Liquid/stream-liquid two-phase flow fluid parameter includes temperature and/or pressure and/or flow.
10. the gas-liquid according to technical solution 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that utilize institute
The interaction for stating lyophoby case liquidometer interlocked control valve (11) Yu the lyophoby case (6), keeps the fluid-tight of the fluid-tight section
Validity.
Following advantageous effects can be obtained using technical solution of the present invention:
1. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System and measurement method can be in various pressure, temperature
Ensure to realize gas-liquid/stream-liquid two-phase flow flow measurement of degree of precision under the conditions of degree and uninterrupted.
2. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System and measurement method can be realized to gas-liquid/vapour
The measurement of the instantaneous flow of liquid two-phase and be not present hesitation.
3. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System structure is simple, it can guarantee the height of flowmeter
Sensitivity identification, is suitable for passive core cooling system.
4. the present invention can guarantee that separating effect reaches 99%, and protect by designing reasonable separator and pipeline
It is constant to demonstrate,prove gas-liquid/vapor-liquid separating device inside liquid level, liquid (water) envelope can drain all flows in time, but liquid (water) seals simultaneously
Inside hydraulically full always (water) thereby ensures that the flow measurement precision of gas/vapor body and liquid.In addition, different by switching
The pipeline of thickness ensure that no matter under big flow or under small flow, can guarantee the measurement accuracy.
Detailed description of the invention
The present invention will be described in detail with reference to the accompanying drawings of the specification.Figure of description not necessarily in strict accordance with than
What example was drawn, and Figure of description is only schematical diagram.In the drawings in the descriptive section of the present application, using identical or
Similar drawing reference numeral indicates the same or similar element.
Fig. 1 is gas-liquid/stream-liquid two-phase flow Flow Measuring System structural schematic diagram according to the first embodiment of the present invention；
Fig. 2 is gas-liquid/stream-liquid two-phase flow Flow Measuring System structural schematic diagram according to the second embodiment of the present invention.
Component and reference signs list
| 1 | Gas-liquid/stream-liquid two-phase flow Flow Measuring System |
| 2 | Inlet duct |
| 3 | Gas-liquid/vapor-liquid separating device |
| 4 | Gas/vapor body flow measurement pipeline |
| 5 | Gas/vapor flowmeter body |
| 6 | Lyophoby (water) case |
| 7 | Lyophoby (water) case liquidometer |
| 8 | Liquid flow measurement pipeline |
| 9 | Dragulator |
| 10 | The U-shaped fluid-tight section of liquid flow measurement pipeline |
| 11 | Lyophoby (water) case liquidometer interlocked control valve |
| 12 | Liquid (water) case |
| 13 | Flowmeter |
| 14 | Valve |
Specific embodiment
Detailed description of the preferred embodiments with reference to the accompanying drawings of the specification, but it may be noted that
It is that the scope of protection of the present invention is not limited by these specific embodiments, but is determined by claims.
The present invention provides a kind of gas-liquid/stream-liquid two-phase flow Flow Measuring Systems, comprising: inlet duct and the entrance
Pipeline connected gas-liquid/vapor-liquid separating device and it is connected respectively with the top and bottom of the gas-liquid/vapor-liquid separating device
Gas/vapor body flow measurement pipeline and liquid flow measurement pipeline.Gas-liquid/vehicle repair major of the gas-liquid/vapor-liquid separating device
Inflow entrance is higher than the initial liquid level in the gas-liquid/vapor-liquid separating device, and the liquid flow measurement pipeline includes at least one
It is provided on fluid-tight section and the liquid flow measurement pipeline for according to the gas-liquid in the inlet duct/stream-liquid two-phase flow stream
The resistance in the gas/vapor body flow measurement pipeline is adjusted to keep the gas/vapor body flow measurement in body parameter
Resistance in pipeline is less than the dragulator of the resistance in the liquid flow measurement pipeline.
Preferably, the setting lyophoby case after the gas-liquid/vapor-liquid separating device and before the fluid-tight section, and
Lyophoby case liquidometer interlocked control valve is set on liquid flow measurement pipeline, to keep the fluid-tight validity of the fluid-tight section.
It is highly preferred that the gas/vapor body flow measurement pipeline and/or the liquid flow measurement pipeline are the more of parallel connection
Road pipeline.
It is highly preferred that in the multiple-way duct of the parallel connection per pipeline all the way above be designed with valve and flowmeter.
Preferably, the dragulator is to adjust resistance valves.
The setting of initial liquid level should meet claimed below in gas-liquid/vapor-liquid separating device of the invention: firstly, initial liquid level
Setting should be lower than inlet duct height, secondly, should met according to gas-liquid/vapor-liquid separating device producer product requirement
In the case where certain separating effect, which is not higher than producer's specified value.Finally, need according to the gas-liquid of inlet duct/
Stream-liquid two-phase flow fluid parameter calculates the resistance of gas pipeline and the resistance of fluid pipeline, judges in the case where maximum tolerance,
Gas line resistance is less than liquid line (in this way, gas will not wash away initial liquid level), moreover, it is judged that the maximum liquid measure the case where
Under, initial liquid level rise, but not be increased to influence separating effect highest liquid level (this is can be by the resistance to liquid line
What power was calculated).Above 3 points of considerations are based primarily upon, the model for the initial liquid measure for generating the initial liquid level can be obtained
It encloses.If initial liquid measure is unsatisfactory for requiring, the adjusting of resistance can be carried out by adjusting resistance control valve.Preferably, it generates
The initial liquid measure of the initial liquid level is in the range of the gas-liquid/vapor-liquid separating device volume 15%-50%；It is highly preferred that
The initial liquid measure of the initial liquid level is generated in the range of the gas-liquid/vapor-liquid separating device volume 20%-40%；Most preferably
Ground generates the initial liquid measure of the initial liquid level in the range of gas-liquid/vapor-liquid separating device volume 25%-35%.
Preferably, the gas-liquid/vapor-liquid separating device is gravity-type gas-liquid/vapor-liquid separating device, centrifugal type gas-liquid/vapour-liquid
Separator or choked flow type gas-liquid/vapor-liquid separating device.
The present invention also provides a kind of gas-liquid/stream-liquid two-phase flow flow-measuring method, the gas-liquid/stream-liquid two-phase flow flow
Measurement method is the following steps are included: provide gas-liquid as previously described/stream-liquid two-phase flow Flow Measuring System；Make gas-liquid/vapour-liquid
Two phase flow fluid enters via the inlet duct carries out gas-liquid/vapor-liquid separation in the gas-liquid/vapor-liquid separating device；It isolates
Gas/vapor body via the gas/vapor body flow measurement pipeline measure gas/vapor body flow；The liquid isolated is via institute
State liquid flow measurement duct survey fluid flow.
In gas-liquid of the invention/stream-liquid two-phase flow flow-measuring method, it is preferable that according to the gas in the inlet duct
Liquid/stream-liquid two-phase flow fluid parameter using the dragulator to the resistance in the gas/vapor body flow measurement pipeline into
Row is adjusted to keep the resistance in the gas/vapor body flow measurement pipeline to be less than the resistance in the liquid flow measurement pipeline
Power.The gas-liquid/stream-liquid two-phase flow fluid parameter includes temperature and/or pressure and/or flow.
In gas-liquid of the invention/stream-liquid two-phase flow flow-measuring method, it is preferable that joined using the lyophoby case liquidometer
The interaction of lock control valve and the lyophoby case keeps the fluid-tight validity of the fluid-tight section.
Present invention is particularly suitable for the passive core cooling systems of CAP1400.
Embodiment 1
Fig. 1 is gas-liquid/stream-liquid two-phase flow Flow Measuring System structural schematic diagram according to the first embodiment of the present invention.
As shown in Figure 1, gas-liquid of the invention/stream-liquid two-phase flow Flow Measuring System mainly includes for inputting gas-liquid/vapour
The inlet duct 2 of liquid two-phase fluid, the gravity-type gas-liquid/vapour liquid separator 3 being connected with the inlet duct 2 and difference
The gas/vapor body flow measurement pipeline 4 and liquid flow being connected with the top and bottom of the gravity-type gas-liquid/vapour liquid separator 3
Measurement pipeline 8.Gas/vapor body flow measurement pipeline 4 is three pipelines in parallel, is provided with valve above each pipeline
And flowmeter.
Gas-liquid/vehicle repair major fluid is passed through by inlet duct 2, gravity-type gas-liquid/vapour liquid separator 3 is entered and carries out vapour
The separation of liquid/gas liquid, downward liquid flow, gas/vapor body flow up.Gas/vapor body flow measurement pipeline 4 is from gravity-type gas
It is connected at the top of liquid/vapour liquid separator 3, parallel multiplex pipeline, sets a Conventional meters in every pipeline respectively, carry out monophasic fluid
Flow measurement, liquid flow measurement pipeline 8 are connected from gravity-type gas-liquid/3 bottom of vapour liquid separator, liquid flow measurement pipeline 8
In be provided with a U-shaped water seal, according to specific flow needs, can also parallel multiplex pipeline, set a Conventional meters on every pipeline,
Carry out monophasic fluid flow measurement.Parallel pipeline is switched over by valve, to realize the difference to small flow and big flow
Demand.To cope with the very big situation of gas/vapor body flow, drain tank is set in gravity-type gas-liquid/3 bottom of vapour liquid separator, and
Valve is set on liquid flow measurement pipeline 8, carried out with drain tank liquid level with valve it is chain, when liquid level is lower than one in drain tank
When determining predetermined value, valve is closed, and at this moment carries out flow measurement by liquid level of the liquidometer to drain tank；When liquid level is higher than centainly in advance
When definite value, valve is opened, maintenance is measured with flowmeter, can guarantee that the validity of water seal is not destroyed in this way.
Gas/vapor body flow measurement pipeline 4 and liquid flow measurement pipeline 8 are finally connected to water tank 12.As shown in Figure 1, weight
Power type gas-liquid/vapour liquid separator 3 initial liquid level is located at the 3 height H(of gravity-type gas-liquid/vapour liquid separator and is not shown in the figure)
30% at.
The present invention can guarantee that separating effect reaches 99%, and guarantee to divide by designing reasonable separator and pipeline
Constant from device inside liquid level, water seal can drain all flows in time, but be full of water in water seal always simultaneously, thereby ensure that
The flow measurement precision of gas/vapor body and liquid.In addition, no matter ensure that by the pipeline of switching different thicknesses in big flow
Under lower or small flow, it can guarantee the measurement accuracy.
The intelligence switching that a plurality of pipeline in parallel carries out flow is arranged in the present invention, and common flow meters are after flow is less than 10%
It just can not accurately be measured, but the present invention can be good at solving this problem, guarantee pipe full.It can accurately measure each
The flow of a range of flow.U-tube design guarantees that liquid is full of, it is ensured that the highly sensitive identification of flowmeter, while also can
Enough carry out transient measurement.It since the accuracy of single-phase measurement is higher, is measured after gas-liquid/vapour-liquid is separated, device returns
Road is simple.
Embodiment 2
Fig. 2 is gas-liquid/stream-liquid two-phase flow Flow Measuring System structural schematic diagram according to the second embodiment of the present invention.
As shown in Fig. 2, the gas-liquid of second embodiment according to the present invention/stream-liquid two-phase flow Flow Measuring System with according to this
The gas-liquid of the first embodiment of invention/stream-liquid two-phase flow Flow Measuring System main distinction is: according to the present invention second
The gas-liquid of embodiment/stream-liquid two-phase flow Flow Measuring System is slightly modified, simplifies structure, eliminates the lyophoby case 6 that can be matched
With lyophoby case liquidometer 7.Lyophoby case liquidometer interlocked control valve 11 and flowmeter 13 are changed to common valve 14 and flow
Meter 13.
Meanwhile according to specific flow needs, gas/vapor body flow measurement pipeline 4 is a pipeline, is provided with valve above
And flowmeter.
As shown in Fig. 2, to be located at the gravity-type gas-liquid/vapour liquid separator 3 high for the initial liquid level of gas-liquid/vapour liquid separator 3
It spends at the 20% of H.
Following advantageous effects can be obtained using technical solution of the present invention:
1. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System and measurement method can be in various pressure, temperature
Ensure to realize gas-liquid/stream-liquid two-phase flow flow measurement of degree of precision under the conditions of degree and uninterrupted.
2. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System and measurement method can be realized to gas-liquid/vapour
The measurement of the instantaneous flow of liquid two-phase and be not present hesitation.
3. gas-liquid of the present invention/stream-liquid two-phase flow Flow Measuring System structure is simple, it can guarantee the height of flowmeter
Sensitivity identification, is suitable for passive core cooling system.
4. the present invention can guarantee that separating effect reaches 99%, and protect by designing reasonable separator and pipeline
Card gas-liquid/vapor-liquid separating device inside liquid level is constant, and water seal can drain all flows in time, but fill always in water seal simultaneously
Full water thereby ensures that the flow measurement precision of gas/vapor body and liquid.In addition, being guaranteed by the pipeline of switching different thicknesses
No matter under big flow or under small flow, it can guarantee the measurement accuracy.
Although a specific embodiment of the invention is described in detail above in conjunction with the embodiments, need to refer to
Out, the scope of protection of the present invention is not limited by these specific embodiments, but by appended claims Lai
It determines.Those skilled in the art can be in the range of not departing from technical idea and purport of the invention to these embodiments
Change appropriate is carried out, and the embodiment after these changes is obviously also included within protection scope of the present invention.
Claims (10)
1. a kind of gas-liquid/stream-liquid two-phase flow Flow Measuring System (1), the gas-liquid/stream-liquid two-phase flow Flow Measuring System include:
Inlet duct (2), the gas-liquid/vapor-liquid separating device (3) being connected with the inlet duct and respectively with the gas-liquid/vapour-liquid
The top and bottom of separator connected gas/vapor body flow measurement pipeline (4) and liquid flow measurement pipeline (8),
It is characterized in that,
The gas-liquid of the gas-liquid/vapor-liquid separating device/vehicle repair major inflow entrance is higher than first in the gas-liquid/vapor-liquid separating device
Beginning liquid level, the liquid flow measurement pipeline include being arranged at least one fluid-tight section (10) and the liquid flow measurement pipeline
Have for according to the gas-liquid in the inlet duct/stream-liquid two-phase flow fluid parameter to the gas/vapor body flow measurement pipeline
In resistance be adjusted to keep resistance in the gas/vapor body flow measurement pipeline to be less than the liquid flow measurement pipe
The dragulator (9) of resistance in road.
2. gas-liquid according to claim 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that in the gas-liquid/vapour
Lyophoby case (6) are set after liquid separating apparatus and before the fluid-tight section, and is arranged on liquid flow measurement pipeline and dredges
Liquid case liquidometer interlocked control valve (11), to keep the fluid-tight validity of the fluid-tight section.
3. gas-liquid according to claim 1 or 2/stream-liquid two-phase flow Flow Measuring System, which is characterized in that the gas/
Steam flow measurement pipeline (4) and/or the liquid flow measurement pipeline (8) are multiple-way duct in parallel.
4. gas-liquid according to claim 3/stream-liquid two-phase flow Flow Measuring System, which is characterized in that described in parallel more
Valve and flowmeter are designed with above every pipeline all the way in the pipeline of road.
5. gas-liquid according to claim 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that generate described initial
The initial liquid measure of liquid level is within the scope of the gas-liquid/vapor-liquid separating device volume 15%-50%.
6. gas-liquid according to claim 1/stream-liquid two-phase flow Flow Measuring System, which is characterized in that the gas-liquid/vapour-liquid
Separator is gravity-type gas-liquid/vapor-liquid separating device, centrifugal type gas-liquid/vapor-liquid separating device or choked flow type gas-liquid/vapour-liquid point
From device.
7. a kind of gas-liquid/stream-liquid two-phase flow flow-measuring method, which is characterized in that the gas-liquid/stream-liquid two-phase flow flow measurement
Method includes:
Gas-liquid/stream-liquid two-phase flow Flow Measuring System (1) as described in any one of preceding claims 1-6 is provided；
Make gas-liquid/stream-liquid two-phase flow fluid via the inlet duct (2) enter the gas-liquid/vapor-liquid separating device (3) in into
Promoting the circulation of qi liquid/vapor-liquid separation；
The gas/vapor body isolated measures gas/vapor body flow via the gas/vapor body flow measurement pipeline (4)；
The liquid isolated measures fluid flow via the liquid flow measurement pipeline (8).
8. gas-liquid according to claim 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that according to the entrance
Gas-liquid/stream-liquid two-phase flow fluid parameter in pipeline is using the dragulator (9) to the gas/vapor body flow tube
Resistance in road is adjusted to keep the resistance in the gas/vapor body flow measurement pipeline to be less than the liquid flow measurement
Resistance in pipeline.
9. gas-liquid according to claim 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that the gas-liquid/vapour-liquid
Two phase flow fluid parameter includes temperature and/or pressure and/or flow.
10. gas-liquid according to claim 7/stream-liquid two-phase flow flow-measuring method, which is characterized in that utilize lyophoby case liquid
The interaction of position meter interlocked control valve (11) and lyophoby case (6), keeps the fluid-tight validity of the fluid-tight section.
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| CN1609563A (en) * | 2004-11-25 | 2005-04-27 | 卢玖庆 | Gas and liquid two-phase flowmeter |
| CN101017105A (en) * | 2006-02-07 | 2007-08-15 | 俞洪燕 | Gas-liquid polyphase flow separating rectifying device and measurement device thereof |
| CN101109655A (en) * | 2007-08-27 | 2008-01-23 | 西安开尔能源工程有限责任公司 | Gas-liquid diphasic volume meter |
| CN101672676A (en) * | 2009-10-14 | 2010-03-17 | 西北工业大学 | Flow measurement device and method of gas-liquid multi-phase flow |
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| US6318156B1 (en) * | 1999-10-28 | 2001-11-20 | Micro Motion, Inc. | Multiphase flow measurement system |
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|---|---|---|---|---|
| CN1609563A (en) * | 2004-11-25 | 2005-04-27 | 卢玖庆 | Gas and liquid two-phase flowmeter |
| CN101017105A (en) * | 2006-02-07 | 2007-08-15 | 俞洪燕 | Gas-liquid polyphase flow separating rectifying device and measurement device thereof |
| CN101109655A (en) * | 2007-08-27 | 2008-01-23 | 西安开尔能源工程有限责任公司 | Gas-liquid diphasic volume meter |
| CN101672676A (en) * | 2009-10-14 | 2010-03-17 | 西北工业大学 | Flow measurement device and method of gas-liquid multi-phase flow |
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