CN106481323A - A kind of wet steam flow mass dryness fraction distribution regulation device and method - Google Patents
A kind of wet steam flow mass dryness fraction distribution regulation device and method Download PDFInfo
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Abstract
The invention discloses a kind of wet steam flow mass dryness fraction distribution regulation device and method，Liquidate threeway including current limliting、Top loop case、Aqueous phase ring case、Steam branch pipe、Single-phase flow measurement of steam device、Blender，Described aqueous phase ring case is located at the lower section of top loop case and is interconnected by sedimentation pipe between top loop case and aqueous phase ring case，Described top loop case the front loop of itself by current limliting liquidate threeway connect main pipeline，Then it is connected with the steam branch pipe with swirl-flow devices by four-way in the rear loop of itself，Described steam branch pipe one side connects single-phase flow measurement of steam device in itself upper end by upper steam bend pipe，On the other hand connect a little water tank in side，Little water tank is connected to sedimentation pipe by four-way again，Described single-phase flow measurement of steam device continues to connect blender backward，Described aqueous phase ring case is connected with aqueous phase branched pipe also by special-shaped four-way，Then aqueous phase branched pipe is connected with blender.Present invention achieves the flow mass dryness fraction distribution to oil field gas injection moist steam and regulation and control.
Description
Technical field
The present invention relates to the distribution of wet steam flow mass dryness fraction, specifically a kind of wet steam flow mass dryness fraction distribution regulation device and
Method.
Background technology
China's heavy oil reserves very abundant, is a kind of important method of oil recovery by heating using Thermal Recovery For Viscous Oil By Steam, wherein notes
Enter the flow of moist steam and mass dryness fraction plays a very important role with increasing economic efficiency to oil well production increasing.In general, oil
The moist steam distribution pipe network commonly used general T type threeway of field face and the threeway that liquidates.Although general T type and the threeway that liquidates should
With convenient, but due to asymmetric on two branch structures, the distribution pressure of each well and flow difference are larger, lead to mass dryness fraction to be divided
Join effect and there is also deviation, affect the regulation of steam injection flow in turn again, when the steam pressure of a bite well, flow, mass dryness fraction
When changing, other branch flows, mass dryness fraction fluctuate simultaneously, cause steam injection pipe network distribution, regulation and control difficulty to increase,
Cannot ensure that the steam injection flow of each branch steam injection well and mass dryness fraction are injected by design requirement, have impact on heavy crude heat extraction yield.
Allotter used abroad mainly has the radial pattern allotter of Texaco company and using shunting split-phase at present
Splitigator allotter.It is in that radiation is distributed in spatial distribution that radial pattern allotter adopts each branched pipe, and each branch exists
Position in allotter is full symmetric, when moist steam flows in allotter, due to symmetrical configuration, then enters each distribution
The chance of pipe is substantially impartial, thus reasonable mass dryness fraction allocation result, referenced patent CN101097104A can be obtained.Using
The Splitigator allotter of split-phase shunting is, using the phenomenon of phase separation of threeway or four-way, moist steam is separated into dry blowing
The purpose mass dryness fraction distribution such as reaching is reconfigured again after vapour and water.Both the above is also mainly used for reference in domestic steam quality distribution
Scheme, develops Patents product.When each well back pressure difference is larger, radial pattern distribution effects are deteriorated, no
Can meet Oil Field each well steam injection pressure difference big when mass dryness fraction distribution a difficult problem.And the allotter using shunting split-phase principle
When change in flow scope is big, there is steam road with water it is impossible to ensure the split-phase effect on steam road.In addition, allotter exists
Do not adopt effective steam flow, mass dryness fraction regulation device while mass dryness fraction distribution, reduce mass dryness fraction distribution from one side yet
Effect and the difficulty of pipe network regulation and control.
Content of the invention
It is an object of the invention to provide a kind of wet steam flow mass dryness fraction distribution regulation device and method, steam phase and aqueous phase lead to
Cross each phase branch road to carry out single-phase distribution respectively and regulate and control, reach the purpose of regulation and control mass dryness fraction, then mix each branch on demand
Steam and water, by critical flow nozzle, reach the purpose of the wet steam flow controlling each branched pipe, thus ensureing to go each point
The flow propping up and mass dryness fraction are by design injection, it is achieved thereby that distributing to the flow mass dryness fraction of oil field gas injection moist steam and regulating and controlling.
In order to reach above-mentioned purpose, present invention employs following technical scheme, a kind of wet steam flow mass dryness fraction distribution regulation and control dress
Put, liquidate threeway, top loop case, aqueous phase ring case, steam branch pipe, single-phase flow measurement of steam device, mixed including current limliting
Clutch, it is mutual that described aqueous phase ring case passes through sedimentation pipe positioned at the lower section of top loop case and between top loop case and aqueous phase ring case
Connection, described top loop case the front loop of itself pass through current limliting liquidate threeway connection main pipeline, then in the rear ring of itself
Road is connected with the steam branch pipe with swirl-flow devices by four-way, and described steam branch pipe one side passes through top in itself upper end
Steam bend pipe connects single-phase flow measurement of steam device, on the other hand connects a little water tank in side, and little water tank passes through again
Four-way connects to sedimentation pipe, and described single-phase flow measurement of steam device continues to connect blender backward, and described aqueous phase ring case is also
Be connected with aqueous phase branched pipe by special-shaped four-way, then aqueous phase branched pipe is connected with blender, wherein in aqueous phase branched pipe and
Aqueous phase regulating valve is set between blender.
Described blender rear end continues to be sequentially connected measure and control device, steam constant-current device, between blender and measure and control device
Control valve is installed.
Described steam constant-current device is the steam constant-current device with critical flow nozzle.
Inside described steam branch pipe, cyclone separation device is installed, described cyclone separation device is spiral swirl vane
The threeway that liquidates of described current limliting is respectively provided with orifice plate or nozzle in the inner-walls of duct of itself two relatively punching.
Described two orifice plates liquidating in pipeline or nozzle are symmetrical.
In order to reach above-mentioned another object, present invention employs following technical scheme, a kind of wet steam flow mass dryness fraction distribution is adjusted
Prosecutor method, first by enter device moist steam pass through current limliting liquidate threeway by the flow of each branch and mass dryness fraction carry out at the beginning of sub-distribution,
Then using top loop case and sedimentation pipe, moist steam is tentatively separated, then steam branch pipe adopts blade-carrying rotation
The water that carries in steam is separated by flow splitting device again, improves steam quality and allotment precision, by detached steam
Collected, then vapour phase branch flow measurement is carried out by single-phase flow measurement of steam device, again pass through steam mixer
Branch is mixed with aqueous phase, now by the aperture of adjustment aqueous phase regulating valve, controls the mass dryness fraction of each branch；The steaming of each branch
Vapour phase be mixed with water after conjunction through the constant flow device with critical flow nozzle enter each steam branch, now by critical
Flow nozzle controls the flow of each branched pipe, then enters flowing through the measure and control device with temperature, pressure and industry control computing system
Row steam flow, mass dryness fraction, the display of temperature and pressure and storage.
The position of sedimentation pipe, number, length and external diameter between optimization design top loop case and aqueous phase ring case, are stood using threeway
The separated characteristic of pipe is strengthened steam and is separated with water, and the water after separating enters aqueous phase ring case, then passes through orifice plate or nozzle
Effusion meter carries out aqueous phase branch flow measurement.
Compared to prior art, the invention has the advantages that：
This device utilizes pressure match method and unidirectional steam and water is controlled, adjustable feature, and steam phase is passed through with aqueous phase
Each phase branch road carries out single-phase distribution respectively and regulates and controls, and reaches the purpose of regulation and control mass dryness fraction, then mixes the steaming of each branch on demand
Vapour and water, by critical flow nozzle, reach the purpose of the wet steam flow controlling each branched pipe, thus ensureing Qu Ge branch
Flow and mass dryness fraction be by design injection, it is achieved thereby that to the distribution of the flow mass dryness fraction of oil field gas injection moist steam and regulation and control.
Current limliting with throttling arrangements such as abacus or nozzles liquidate three-way device realize in main pipeline enter moist steam from
When two branches flow out, each branch mass dryness fraction keep identical with supervisor's mass dryness fraction it is ensured that the distribution of symmetrical ring case and ability of regulation and control and surely
Qualitative, its principle is to improve the carrying capacity to water for the steam in assigning process, and reduces the kinetic energy of water as far as possible.Using
Measure is to install orifice plate or nozzle additional in the branch road of impingement threeway (section is circle).
Arrange T-shaped threeway vertically upward or vertically downward, and caliber reasonable in design and length can make steam and water two
In the separated situation of the generation of element internal, that is, the situation of all single-phase steam of arm or water in phase fluid.Permissible
By the use of T-shaped threeway this separated characteristic as pre-separate device.Then by the swirl-flow devices with blade construction,
Further moisture in gas can be separated using centrifugal force and gravity principle, realize being kept completely separate of steam and water.
Brief description
Fig. 1 is a kind of structural representation of wet steam flow mass dryness fraction distribution regulation device of the present invention；
Fig. 2 is the structural representation of the cyclone separation device with blade；
Fig. 3 is that the current limliting of perforated plate liquidates the structural representation of threeway；
Fig. 4 is that the current limliting with nozzle liquidates the structural representation of threeway；
Fig. 5 is the structural representation of the steam constant-current device with critical flow nozzle.
In figure：1- main pipeline；2- current limliting liquidates threeway；3- top loop case；4- sedimentation pipe；5- aqueous phase ring case；6- steam
Arm；The little water tank of 7-；8- upper steam bend pipe；9- single-phase flow measurement of steam device；10- abnormity four-way；11- aqueous phase
Branched pipe；12- orifice plate or nozzle flowmeter；13- aqueous phase regulating valve；14- blender；15- control valve；16- measure and control device；
17- steam constant-current device.
Specific embodiment
Detailed description for the present invention and technology contents, cooperation brief description is as follows, but accompanying drawing only provides with reference to and says
Bright be used, be not used for the present invention is any limitation as.
According to Fig. 1-5, embodiment 1：Wet steam flow mass dryness fraction distributes regulation device, liquidates threeway 2, top including current limliting
Ring case 3, aqueous phase ring case 5, steam branch pipe 6, single-phase flow measurement of steam device 9, blender 14, described aqueous phase ring case
It is interconnected by sedimentation pipe 4 positioned at the lower section of top loop case and between top loop case and aqueous phase ring case, described top loop
Case connects main pipeline 1 in the front loop of itself by the current limliting threeway that liquidates, and then passes through four-way and carrying in the rear loop of itself
The steam branch pipe 6 of swirl-flow devices connects, and described steam branch pipe one side is connected by upper steam bend pipe 8 in itself upper end
Single-phase flow measurement of steam device, on the other hand side connect a little water tank 7, little water tank again pass through four-way connect to sink
Fall pipe, described single-phase flow measurement of steam device continues to connect blender 14 backward, and described aqueous phase ring case is also by abnormity four
Logical 10 are connected with aqueous phase branched pipe 11, and then aqueous phase branched pipe is connected with blender, wherein in aqueous phase branched pipe and mixing
Aqueous phase regulating valve 13 is set between device.
Embodiment 2：On the basis of embodiment 1, described blender rear end continues to be sequentially connected measure and control device 16, steam
Constant-current device 17, installs control valve 15 between blender and measure and control device.Described steam constant-current device is with critical flow
The steam constant-current device of nozzle.Inside described steam branch pipe, cyclone separation device is installed, described cyclone separation device is spiral shell
Rotating swirl vane.The threeway that liquidates of described current limliting is respectively provided with orifice plate or nozzle in the inner-walls of duct of itself two relatively punching.
Described two orifice plates liquidating in pipeline or nozzle are symmetrical.
Liquidate threeway 2 in the current limliting with throttling arrangements such as abacus or nozzles for the downstream connection of main pipeline 1, liquidate threeway two
Side connects the ring case 3 of upper steam and water, and top loop case 3 is connected with lower aqueous ring case 5 with sedimentation pipe 4 by threeway,
Collect the water being settled by top loop case to branched sedimentation pipe, top loop case 3 is propped up with the steam with swirl-flow devices by four-way
Pipe 6 connects, and at least provided with two, in figure is illustrated as 3 to steam branch pipe 6, and quantity can be arranged according to practical situation,
By steam branch pipe 6, detached aqueous phase is collected in little water tank 7 further, settles bottom from each branch four-way and sedimentation pipe 4
In aqueous phase ring case.Pass through upper steam bend pipe 8 and orifice plate or the list of Venturi nozzle composition from the detached steam of steam branch pipe
Phase flow measurement of steam device 9 measures, then mixed with water with the blender 14 of steam and water.Equally, aqueous phase
Ring case 5 is passed through special-shaped four-way 10 and is connected with aqueous phase branched pipe 11, then passes through orifice plate or nozzle flowmeter 12 and adjusts with aqueous phase
Section valve 13 connects, and reaches the purpose controlling aqueous phase flow and each branch mass dryness fraction by regulating valve 13, then by steam and
The blender 14 of water is mixed with steam phase, enters the control valve 15 of steam branch, controls each branch switch.Control valve 15
Below connect with temperature, pressure and industry control computing system measure and control device 16, be controlled by single-chip microcomputer, show and
Store temperature, pressure, flow and the mass dryness fraction real time data of the moist steam of each branch.Connect after measure and control device 16 and carry
The adjustable or fixed moist steam constant-current device 17 of critical flow nozzle structure, completes a set of steam injection pipe network and controls different notes
The flow of vapour branch and the purpose of mass dryness fraction.
This device utilizes pressure match method and unidirectional steam and water is controlled, adjustable feature, first will enter the wet of device
The flow of each branch and mass dryness fraction are carried out just sub-distribution by liquidate threeway and flow blocking element with Flow restrictions by steam, so
Using the standpipe of top header and special arrangement, moist steam is tentatively separated afterwards, is then adopted blade-carrying eddy flow
The water that carries in steam is separated by device again, improves steam quality and allotment precision, detached steam is converged
Always, then pass through orifice plate or nozzle measures the vapour survey of each aqueous phase branch, carry out with aqueous phase branch flowing through steam mixer
Mixing, now by the aperture of adjustment aqueous phase regulating valve, controls the mass dryness fraction of each branch.Optimization design upper and lower header it
Between the position of sedimentation pipe, number, length and external diameter, strengthen steam using the separated characteristic of threeway standpipe and separate with water,
Water after separating enters aqueous phase header, enters each aqueous phase branch by orifice plate or nozzle and carry out aqueous phase flow measurement after collecting.
The steam phase of each branch be mixed with water after conjunction through the constant flow device with critical flow nozzle enter each steam branch, this
When control the flow of each branched pipe by critical flow nozzle, then flowing through with temperature, pressure and industry control computing system
Measure and control device carries out steam flow, mass dryness fraction, the display of temperature and pressure and storage.
Steam phase and aqueous phase carry out single-phase distribution respectively by each phase branch road and regulate and control, and reach the purpose of regulation and control mass dryness fraction, then
Mix steam and the water of each branch on demand, by critical flow nozzle, reach the mesh of the wet steam flow controlling each branched pipe
, thus ensureing that the flow of Qu Ge branch and mass dryness fraction are by design injection, it is achieved thereby that the stream to oil field gas injection moist steam
Amount mass dryness fraction distribution and regulation and control.
Hereinafter the principle of important device in this invention is explained：
Current limliting with throttling arrangements such as abacus or nozzles liquidate three-way device realize in main pipeline enter moist steam from
When two branches flow out, each branch mass dryness fraction keep identical with supervisor's mass dryness fraction it is ensured that the distribution of symmetrical ring case and ability of regulation and control and surely
Qualitative, its principle is to improve the carrying capacity to water for the steam in assigning process, and reduces the kinetic energy of water as far as possible.Using
Measure is to install orifice plate or nozzle additional in the branch road of impingement threeway (section is circle).Structure is shown in accompanying drawing 3 and Fig. 4.
Arrange T-shaped threeway vertically upward or vertically downward, and caliber reasonable in design and length can make steam and water two
In the separated situation of the generation of element internal, that is, the situation of all single-phase steam of arm or water in phase fluid.Permissible
By the use of T-shaped threeway this separated characteristic as pre-separate device.Then by the swirl-flow devices with blade construction,
Further moisture content in gas can be separated using centrifugal force and gravity principle, realize being kept completely separate of steam and water.
Schematic construction is shown in accompanying drawing 2.
Pass through respectively steam and water orifice plate or Venturi nozzle can be with the flow mass M of direct measurement steamG, water
Flow mass ML, by being added the flow mass M of steamG, the flow mass M of waterLIt is possible to know moist steam
Gross mass M.And for steam water two-phase mixture, the share of biphase mass flow shared by steam phase mass flow is referred to as dry
Degree.Based on this, mass dryness fraction X can be expressed as：
M=ML+MG
Or
Therefore, it can obtain gross mass M of moist steam and mass dryness fraction X；Then by the sensor-based system with temperature and pressure
Realize temperature, pressure, flow and the mass dryness fraction real time data of moist steam with measure and control device
Moist steam constant-current device is by the control device of critical flow nozzle principle design, when the flow velocity of throat reaches velocity of sound,
Flow is only relevant with upstream pressure and throat aperture (unrelated with downstream pressure).Thus realizing constant flow.Its theoretical mass flow
Amount qmiFor：
In formula：The inner section of A nozzle throat is amassed；R gas constant；CiCritical flow under ideal conditionss；P0—
Gas stagnation pressure before nozzle；T0Gas stagnation temperature before mouth.
Constant-current device schematic construction with critical flow nozzle is shown in accompanying drawing 5.
The final present invention can reach following effect, and 1, regulatable steam flow scope 0t/h-48t/h, mass dryness fraction 0-100%；
2nd, pressure 0-22MPa；3rd, temperature 0-375 DEG C；4th, the flow of two branch roads and mass dryness fraction error are less than 5%.
The foregoing is only presently preferred embodiments of the present invention, be not used to limit the scope of the claims of the present invention, other use this
The equivalence changes of bright patent spirit, all should all belong to the scope of the claims of the present invention.
Claims (8)
1. a kind of wet steam flow mass dryness fraction distributes regulation device，It is characterized in that，Liquidate threeway including current limliting、Top loop case、Aqueous phase ring case、Steam branch pipe、Single-phase flow measurement of steam device、Blender，Described aqueous phase ring case is located at the lower section of top loop case and is interconnected by sedimentation pipe between top loop case and aqueous phase ring case，Described top loop case the front loop of itself by current limliting liquidate threeway connect main pipeline，Then it is connected with the steam branch pipe with swirl-flow devices by four-way in the rear loop of itself，Described steam branch pipe one side connects single-phase flow measurement of steam device in itself upper end by upper steam bend pipe，On the other hand connect a little water tank in side，Little water tank is connected to sedimentation pipe by four-way again，Described single-phase flow measurement of steam device continues to connect blender backward，Described aqueous phase ring case is connected with aqueous phase branched pipe also by special-shaped four-way，Then aqueous phase branched pipe is connected with blender，Aqueous phase regulating valve is set wherein between aqueous phase branched pipe and blender.
2. a kind of wet steam flow mass dryness fraction distribution regulation device according to claim 1, it is characterised in that described blender rear end continues to be sequentially connected measure and control device, steam constant-current device, installs control valve between blender and measure and control device.
3. a kind of wet steam flow mass dryness fraction distribution regulation device according to claim 2 is it is characterised in that described steam constant-current device is the steam constant-current device with critical flow nozzle.
4. it is characterised in that being provided with cyclone separation device inside described steam branch pipe, described cyclone separation device is spiral swirl vane to a kind of wet steam flow mass dryness fraction distribution regulation device according to claim 1.
5. it is characterised in that described current limliting liquidates, threeway is respectively provided with orifice plate or nozzle in the inner-walls of duct of itself two punching relatively to a kind of wet steam flow mass dryness fraction distribution regulation device according to claim 1.
6. a kind of wet steam flow mass dryness fraction distribution regulation device according to claim 4 is it is characterised in that described two orifice plate liquidating in pipeline or nozzle are symmetrical.
7. a kind of wet steam flow mass dryness fraction distributes regulation and control method, it is characterized in that, first by enter device moist steam pass through current limliting liquidate threeway by the flow of each branch and mass dryness fraction carry out at the beginning of sub-distribution, then using top loop case and sedimentation pipe, moist steam is tentatively separated, then the water that carries in steam is separated again by steam branch pipe using blade-carrying cyclone separation device, improve steam quality and allotment precision, detached steam is collected, then vapour phase branch flow measurement is carried out by single-phase flow measurement of steam device, again pass through steam mixer to be mixed with aqueous phase branch, aperture now by adjustment aqueous phase regulating valve, control the mass dryness fraction of each branch；The steam phase of each branch be mixed with water after conjunction through the constant flow device with critical flow nozzle enter each steam branch, control the flow of each branched pipe now by critical flow nozzle, then carry out steam flow, mass dryness fraction, the display of temperature and pressure and storage flowing through the measure and control device with temperature, pressure and industry control computing system.
8. a kind of wet steam flow mass dryness fraction according to claim 6 distributes regulation and control method, it is characterized in that, the position of sedimentation pipe, number, length and external diameter between optimization design top loop case and aqueous phase ring case, strengthen steam using the separated characteristic of threeway standpipe to separate with water, water after separating enters aqueous phase ring case, then carries out aqueous phase branch flow metering by orifice plate or nozzle flowmeter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110984935A (en) * | 2019-12-12 | 2020-04-10 | 中国石油化工股份有限公司 | Intelligent steam regulation and control device for oil field ground steam injection pipe network |
| CN111119790A (en) * | 2019-12-12 | 2020-05-08 | 中国石油化工股份有限公司 | Equal-dryness separate injection valve for segmented steam injection of thermal recovery horizontal well |
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| CN106481323B (en) | 2023-10-20 |
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