CN106517396B - A kind of high-pressure gas-liquid separation control device and its control method - Google Patents
A kind of high-pressure gas-liquid separation control device and its control method Download PDFInfo
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 47
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims description 31
- 238000007667 floating Methods 0.000 claims description 28
- 238000010079 rubber tapping Methods 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
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- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- E—FIXED CONSTRUCTIONS
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Abstract
The present invention relates to a kind of high-pressure gas-liquid separation control device and its control method, including horizontal or vertical knockout drum, knockout drum liquid outlet, gas outlet are connect with coaxial float-controlled valve；Coaxial float-controlled valve is connected to balanced valve；Coaxial float-controlled valve top connects exhaust line, bottom connected drainage pipeline；Drain, exhaust line are respectively equipped with electric controlled regulating valve, flowmeter；Liquid level stabilizing device is set at knockout drum liquid outlet；Electric controlled regulating valve is set at knockout drum inlet；Knockout drum is additionally provided with cowling panel, magnetic double level gauge, further includes PLC controller, and PLC controller monitors separator work pressure, gas flowmeter moisture content, fluid flowmeter race conditio respectively；PLC controller controls inlet, liquid outlet, gas outlet electric controlled regulating valve.The problem of this high-pressure gas-liquid separation control device and its control method, solve low pressure separator separating capacity deficiency and high-pressure separator manual control causes gas outlet to go out liquid, liquid outlet outlet, natural gas is convenient for safety ignition and returns drain recycling.
Description
Technical field
The invention belongs to gas-liquid separation fields, and in particular to a kind of high-pressure gas-liquid separation control device and its control method.
Background technique
It is the essential technical process of acidification of oil field operation that acidification of gas well, which returns drain processing, and wherein gas-liquid separator is this
Main separation equipment in operation process.Currently, since design or method of controlling operation thereof are improper, so that gas-liquid separator is unsatisfactory for
Return drain processing needs.In operation, it is vented drain by the switch that worker's experience and observation manually adjust discharge control valve,
It often results in gas outlet and goes out liquid, liquid outlet outlet.Especially inlet pressure changes in flow rate when, due to taking manual switch valve
Mode, causes separator gas outlet largely to take liquid, and liquid outlet gas-coning phenomena is serious.When gas outlet water content is big, can be by igniting
The flare of system extinguishes, and fuel gas is caused to diffuse, or even causes deflagration accident.
Current normal pressure separator, when fluid flow 1 side/point, when tolerance reaches 50,000 sides/day or more, gas phase in knockout drum
Flow velocity is excessive, and gas fluid-carrying capability increases, and no longer meets gas-liquid Gravity Separation condition.Therefore, normal pressure separator does not have when atm number
Standby separating capacity.
Current high-pressure separator, the operating pressure of separator reach 10MPa, and gas separating capacity reaches 300,000 sides/day.It is logical
The switch for crossing manual operating valve door carries out drain, exhaust.When liquid level is low, big gas outlet is opened；When liquid level is high, opens and go out liquid greatly
Mouthful.Since separator inside and outside differential pressure is big, outlet valve opens big rear separator work pressure moment change, and gaseous phase volume is swollen rapidly
It is swollen, flow velocity increase, causing gas outlet to be taken, liquid is serious, and liquid outlet gas-coning phenomena is serious, liquid outlet arrange some liquid will gas-liquid with go out,
Separating effect is not achieved.
Gas-liquid separation is the technology of a comparative maturity, and action principle is the physical property difference according to multiple fluid,
It is separated in the way of gravity, centrifugal force, screening stream etc..Since gas phase and liquid phase have different density, gravity makes heavier
Liquid be settled down to bottom first, gas phase diffusion to top is discharged by exhaust outlet overflow.
The country carries out the test of high-pressure separator, is arranged by manual control gas outlet valve and the switch of liquid outlet valve
Gas, drain.Finally because high-pressure separator gas outlet goes out liquid, the problem of liquid outlet a large amount of outlets and it cannot get practical application.
Summary of the invention
The purpose of the invention is to overcome above-mentioned existing technical problem, provide a kind of high-pressure gas-liquid separation control device and
Method solves the problem of that high-pressure gas-liquid separator gas outlet goes out liquid liquid outlet outlet and low pressure separator separating capacity is insufficient
Problem.
In order to achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of high-pressure gas-liquid separation control device, including knockout drum, knockout drum are connected with feed liquor pipeline, are arranged on knockout drum
There are liquid outlet, gas outlet and sewage draining exit,
The feed liquor pipeline is equipped with pressure transmitter and feed liquor electric controlled regulating valve, point of the feed liquor pipeline connection
From at tank inlet be equipped with cowling panel；
The sewage draining exit connects blowdown pipeline, and blowdown pipeline is equipped with manual modulation valve；
The liquid outlet, gas outlet pass through pipeline respectively and connect coaxial float-controlled valve, and coaxial float-controlled valve is connected to balanced valve；
Exhaust line, bottom connected drainage pipeline are connected at the top of the coaxial float-controlled valve, tapping line is equipped with the automatically controlled adjusting of drain
Valve and fluid flowmeter, exhaust line is equipped with exhaust electric controlled regulating valve and gas flowmeter, exhaust line are connected to burner；
Magnetic double level gauge and temperature, pressure transmitter are also equipped on the knockout drum.
The coaxial float-controlled valve, balanced valve are mounted on outside knockout drum, the air inlet of the coaxial float-controlled valve with point
Equal from the highest liquid level inside device, the inlet of coaxial float-controlled valve is lower than the minimum level of separator interior.
The coaxial float-controlled valve uses interlocking-type float, and coaxial float-controlled valve includes the coaxial float valve shell of coaxial package
With coaxial float-controlled valve inner casing, coaxial float-controlled valve air inlet and coaxial float-controlled valve is respectively set in coaxial float-controlled valve shell upper and lower part
Inlet is uniformly distributed coaxial float-controlled valve inlet opening on coaxial float-controlled valve inner casing, and coaxial float-controlled valve inner casing is built-in with coaxial float
Valve float, coaxial float-controlled valve float are floating ball or cylindrical body, and coaxial float is respectively set in coaxial float-controlled valve inner casing top and bottom end
Valve outlet and coaxial float-controlled valve leakage fluid dram, coaxial float valve outlet and coaxial float-controlled valve leakage fluid dram are separately connected exhaust line
And tapping line.
The balanced valve includes the balance valve shell peace weighing apparatus valve inner casing of coaxial package, and the setting of balanced valve outer casing underpart is flat
Weigh valve inlet, is evenly distributed with balanced valve inlet opening on balanced valve inner casing, and balanced valve inner casing is built-in with balanced valve float, balance
Valve float is floating ball or cylindrical body, and balance valve outlet peace weighing apparatus valve leakage fluid dram is respectively set in balanced valve inner casing top and bottom end,
Balance valve outlet peace weighing apparatus valve leakage fluid dram passes through high pressure fine pipeline connection exhaust line and tapping line respectively.
Liquid level stabilizing device is equipped at the liquid outlet of the knockout drum bottom, the liquid level stabilizing device is laterally arranged
Tubular column structure closed at one end, the bottom side of tubing string are evenly distributed with feed liquor aperture, and the outlet of tubing string end is connected to liquid outlet.
Mist eliminator is equipped at gas outlet at the top of the knockout drum.
The separator also connects a safety valve by pipeline, and the exhaust pipe county of the coaxial float-controlled valve connection is logical
A by-pass line is crossed to be connected to safety valve.
The high-pressure gas-liquid separation control device further includes a PLC controller, the PLC controller respectively with pressure
Power table, gas flowmeter, fluid flowmeter, magnetic double level gauge, feed liquor electric controlled regulating valve, leakage fluid dram electric controlled regulating valve, exhaust
The connection of mouth electric controlled regulating valve, the connection of temperature, pressure transmitter.
The PLC controller includes the monitoring modular for monitoring separator data, carries out operational analysis simultaneously to monitoring data
Make the computing module of algorithm, the execution module for executing algorithm and display operation and the display mould for regulating and controlling result
Block.
A kind of control method of high-pressure gas-liquid separation control device, follows the steps below:
(1) separator initialization pressure 0.1MPa is set, pressure amplification 0.1MPa is set；
(2) PLC controller monitoring modular real-time monitoring separator work pressure P, liquid level h, gas flowmeter moisture content with
Fluid flowmeter race conditio；
(3) if PLC controller monitoring modular detects that fluid flowmeter and gas flowmeter are working properly, control is terminated in advance
System；
(4) it if PLC controller monitoring modular detects gas flowmeter moisture content height or fluid flowmeter disorder, and works
Signal is transmitted to PLC controller execution module, controls feed liquor electric controlled regulating valve, reduces liquid inlet volume by pressure P > 4MPa；
(5) it if PLC controller monitoring modular detects gas flowmeter moisture content height or fluid flowmeter disorder, and works
Pressure P < 4MPa；PLC controller computing module receives the signal and data of PLC controller monitoring modular, calculates separator pot
Interior gas phase flow velocity V and the gas phase permissible velocity of flow Vc under corresponding operating pressure；
(6) PLC controller computing module compares V and Vc size: if V < Vc, PLC controller execution module does not receive letter
Number, while " valve error " signal, and warning note are fed back to PLC controller display module；If V > Vc, PLC controller is executed
Module receives signal, increases drain electric controlled regulating valve and exhaust electric controlled regulating valve pressure 0.1MPa；
(7) PLC controller computing module receives signal, separator work pressure P more adjusted after pressure adjustment1
With former separator work pressure P；If P1- P < 0.1, PLC controller computing module feeds back " pressure is not adjusted " signal to be controlled to PLC
Device display module processed and warning note, at this point, increased simultaneously by way of manually controlling solenoid valve drain electric controlled regulating valve with
It is vented electric controlled regulating valve pressure 0.1MPa；If P1- P >=0.1MPa, PLC controller monitoring modular detect gas flowmeter at this time
Moisture content and fluid flowmeter race conditio, and signal is fed back into display module；
(8) if PLC controller display module shows abnormal, repetition step (4) to (7)；If PLC controller display module
Display is normal, finishing control.
This high-pressure gas-liquid separation control device provided by the invention and its control method the utility model has the advantages that
(1) high-pressure gas-liquid separator of the invention uses horizontal knockout drum, and gas phase treatment ability is vertical separator
3~5 times.
(2) gas outlet, liquid outlet are controlled using coaxial float-controlled valve, and when realizing gas liquid ratio variation very greatly, liquid outlet can only go out
Liquid, gas outlet can only outlets.
(3) balanced valve is connected to coaxial float-controlled valve, so that coaxial float-controlled valve, which closes side, to be restored to normally in liquid level
When liquid level, can just it reopen；Avoid liquid level highest or it is minimum when, caused because of level fluctuation gas outlet take liquid, go out liquid
Mouth band gas.
(4) coaxial float-controlled valve of the invention and balanced valve are installed on outside knockout drum, convenient for safeguarding and replacement.
(5) liquid level stabilizing device is used at high-pressure gas-liquid separator liquid outlet of the invention, is reduced original heavy caliber and is gone out
The huge spill whirlpool generated when liquid inhales volume gas phase.
(6) present invention uses PLC controller synchronously control liquid outlet, gas outlet electric controlled regulating valve, improves separator work
Stablize pressure inside the tank while pressure.
(7) high-pressure gas-liquid separation control device of the invention and method can control working pressure range (0.1~4) MPa,
It is suitable for the operating condition that gas liquid ratio changes greatly.
(8) control signal of the invention is with pressure-temperature transmitter, magnetic double level gauge, liquid outlet flowmeter, gas outlet
Flowmeter is easy to acquire as test point, information used.
Detailed description of the invention
The present invention is described in further details below with reference to attached drawing.
Fig. 1 is high-pressure gas-liquid separation control device structural schematic diagram.
Fig. 2 is control method flow chart of the invention.
Fig. 3 is coaxial float-controlled valve structural schematic diagram.
Fig. 4 is balancing valve structure schematic diagram.
Fig. 5 is liquid level stabilizing device structural schematic diagram.
Description of symbols: 1, pressure transmitter；2, feed liquor electric controlled regulating valve；3, cowling panel；4, manual modulation valve；5, it arranges
Dirty mouth；6, liquid level stabilizing device；7, liquid outlet；8, magnetic double level gauge；9, temperature, pressure transmitter；10, safety valve；11, mist is caught
Device；12, gas outlet；13, coaxial float-controlled valve；14, drain electric controlled regulating valve；15, fluid flowmeter；16, balanced valve；17, it is vented
Electric controlled regulating valve；18, gas flowmeter；19, burner；20, coaxial float-controlled valve air inlet；21, coaxial float-controlled valve inlet；
22, coaxial float-controlled valve inner casing；23, coaxial float valve shell；24, coaxial float-controlled valve inlet opening；25, coaxial float-controlled valve float；26,
Coaxial float-controlled valve leakage fluid dram；27, tapping line；28, coaxial float valve outlet；29, exhaust line；30, balanced valve inlet；
31, valve shell is balanced；32, balanced valve inner casing；33, balanced valve inlet opening；34, balanced valve float；35, valve outlet is balanced；36,
Balanced valve leakage fluid dram；37, high pressure fine pipeline.
Specific embodiment
Embodiment 1:
The present embodiment provides a kind of high-pressure gas-liquid separation control devices, as shown in Figure 1, including knockout drum, knockout drum connection
There is feed liquor pipeline, liquid outlet 7, gas outlet 12 and sewage draining exit 5 are provided on knockout drum, knockout drum can be horizontal or vertical separation
Tank, in the present embodiment, using the horizontal knockout drum of knockout drum, gas phase treatment ability is 3~5 times of vertical separator, described
Magnetic double level gauge 8 and temperature, pressure transmitter 9, real-time detection separator work situation are also equipped on knockout drum.
Feed liquor pipeline is equipped with pressure transmitter 1 and feed liquor electric controlled regulating valve 2, the knockout drum of the feed liquor pipeline connection
Cowling panel 3 is equipped at inlet.Sewage draining exit 5 connects blowdown pipeline, and blowdown pipeline is equipped with manual modulation valve 4.
Liquid outlet 7, gas outlet 12 connect coaxial float-controlled valve 13 by pipeline respectively, and coaxial float-controlled valve 13 is connected to balanced valve
16；Exhaust line 29, bottom connected drainage pipeline 27 are connected at the top of the coaxial float-controlled valve 13, tapping line 27 is equipped with row
Liquid is passed through the far defeated recycling of pipeline by liquid electric controlled regulating valve 14 and fluid flowmeter 15.Exhaust line 29 is equipped with exhaust
Electric controlled regulating valve 17 and gas flowmeter 18, exhaust line 29 are connected to burner 19, and gas phase is delivered to burning by pipeline
Device 19 is lighted.
Based on above structure, the present embodiment designs the specific size of a set of knockout drum:
(1) calculating from can body size and the design of liquid outlet 7 and 12 diameter of gas outlet calculate:
Design considerations: maximum 1 side of acidification blowdown period fluid flow/point.In the drain later period, gas liquid ratio can reach 50% with
When upper, gas flow is up to 100,000 sides/day in mixed liquor.The operating pressure of knockout drum is in (0-4) MPa.It is main according to these
Parameter is designed calculating to knockout drum size of main body and liquid outlet and gas outlet diameter parameters.
Referring to national standard SYT0515 " separator specification " design criteria.What horizontal separator need to meet 2min-4min holds liquid
Amount.Need to have the buffering capacity of certain time simultaneously, buffer time generally holds the 1/2 of the liquid time.
By iterative calculation, the liquid time is held in selection and buffer time is respectively 2min and 1min, obtains separator tank diameter
It is 1.2mX4.5m with straight section height.Highest liquid level 720mm is designed, liquid level 550mm, minimum liquid level 230mm are worked normally.
Separator main body dimensional check:
It should be less than making the time required to drop is taken out of separator by air-flow according to the time needed for droplet settling to liquid collection section
The foundation calculated for gas phase permissible velocity of flow.Horizontal separator gas phase permissible velocity of flow calculates as follows: Vc=0.7 (L/ (1-h) D) VL。
Liquid level selection design minimum liquid level h=1/6.Water-drop sedimentation velocity VL=Reμg/dρg, defined and acquired by Reynolds number.P >
When 0.4MPa, natural gas separating capacity: Qg=D2 Wg P Ts 10^6/(5.342Ps T Z B)=120,000 sides/day, meet design
It is required that.
(2) knockout drum gas outlet diameter calculation:
Within separator work pressure 4MPa, tolerance is not less than 1x105m3/d.According to ask produce calculation formula obtain: 186 X
d2X4X9.8/(0.58X300)0.5>1x105m3/d；It can obtain: d=40mm.So determining that 12 diameter of knockout drum gas outlet is
40mm。
(3) knockout drum liquid outlet diameter calculation:
Within separator work pressure 4MPa, 1 side of liquid maximum stream flow/point.According to venturi throttling calculation formula, calculate
Obtaining 7 diameter calculation of liquid outlet is 35mm.So determining that 7 diameter of knockout drum liquid outlet is 35mm.
In conclusion present embodiment ensure that knockout drum liquid handling capacity be up to 1 side/point, the separating capacity of natural gas
Not less than 1x105m3/d.Within separator work pressure 4MPa.Required knockout drum main diameter and length are as follows: 1.2mX4.5m.Point
It is 40mm from tank gas outlet diameter, liquid outlet diameter is 35mm.
Embodiment 2:
When in order to realize gas liquid ratio variation very greatly, liquid outlet can only go out liquid, and gas outlet can only outlet.The present embodiment coaxially floats
Sub- valve 13, balanced valve 16 are mounted on outside knockout drum, are conveniently replaceable maintenance.The air inlet of the coaxial float-controlled valve 13 with separate
Highest liquid level inside device is equal, and the inlet of coaxial float-controlled valve 13 is lower than one floating ball height of minimum level of separator interior
Degree.
As shown in figure 3, coaxial float-controlled valve 13 uses interlocking-type float in the present embodiment, coaxial float-controlled valve 13 includes coaxial sleeve
The coaxial float valve shell 23 and coaxial float-controlled valve inner casing 22 of dress, coaxial 23 upper and lower part of float valve shell is respectively set coaxially
Float-controlled valve air inlet 20 and coaxial float-controlled valve inlet 21 are uniformly distributed coaxial float-controlled valve inlet opening on coaxial float-controlled valve inner casing 22
24, coaxial float-controlled valve inner casing 22 is built-in with coaxial float-controlled valve float 25, and coaxial float-controlled valve float 25 is floating ball or cylindrical body, coaxially
Coaxial float valve outlet 28 and coaxial float-controlled valve leakage fluid dram 26, coaxial float is respectively set in 22 top of float-controlled valve inner casing and bottom end
Valve outlet 28 and coaxial float-controlled valve leakage fluid dram 26 are separately connected exhaust line 29 and tapping line 27.
At least one end port opening when coaxial float-controlled valve 13 works；The float of coaxial float-controlled valve 13 is using spherical or cylinder
Body switchs valve port using the relationship of gravity and buoyancy；Coaxial float-controlled valve float 25 can only be by the constraint of coaxial float-controlled valve inner casing 22
It is moved on vertical direction, coaxial float-controlled valve inlet opening 24 is uniformly distributed on coaxial float-controlled valve inner casing 22, so that inner casing and shell structure
At linker structure.
As shown in figure 4, balanced valve 16 includes the balance valve shell 31 and balanced valve inner casing 32 of coaxial package in the present embodiment,
It balances 31 lower part of valve shell and balanced valve inlet 30 is set, be evenly distributed with balanced valve inlet opening 33 on balanced valve inner casing 32, put down
Weighing apparatus valve inner casing 32 is built-in with balanced valve float 34, and balanced valve float 34 is floating ball or cylindrical body, 32 top of balanced valve inner casing and bottom
Balance valve outlet 35 and balanced valve leakage fluid dram 36 is respectively set in end, balances valve outlet 35 and balanced valve leakage fluid dram 36 leads to respectively
It crosses high pressure tubule line 37 and connects exhaust line 29 and tapping line 27.
The float of balanced valve 16 uses floating ball or cylindrical body, utilizes the relationship switch valve of gravity and buoyancy and pressure difference three
Mouthful；Balanced valve 16 is eliminated after coaxial 13 valve port of float-controlled valve is closed to be influenced by pressure difference.
It is safe and reliable to operation to reach equipment, coaxial float-controlled valve and balanced valve design are calculated below:
(1) coaxial float-controlled valve design:
Floating ball, which opens leakage fluid dram by buoyancy overcoming gravity, to meet condition: FIt is floating—G> 0;Floating ball is closed by buoyancy overcoming gravity
Condition need to be met by closing exhaust outlet: FIt is floating—G> 0 。
Floating ball uses specific gravity to make for 1.14 Buddhist nun's human relations materials.Floating ball is hollow sphere, and interior outer radius need to meet R/r < 2.This
Embodiment preferred outer radius R=50mm, internal diameter r=35mm.
Coaxial float-controlled valve air inlet open height is equal with highest liquid level, and inlet is lower than design one floating ball height of minimum level
Degree.Liquid level designs highest H in knockout drumh=720mm, minimum liquid level HL=230mm.It is high that coaxial float-controlled valve is designed according to liquid level variation
Degree: H=Hh—HL+HFloating ball+HContact=720-230+100+10=600mm。
(2) design of balanced valve:
Since coaxial float-controlled valve is Yi Dan closed, the inside and outside differential pressure of valve is larger, and float-controlled valve is not capable of resetting.So devising flat
Weigh valve, switchs balanced valve using the relationship of floating ball gravity and buoyancy, and then eliminates coaxial float-controlled valve pressure difference interference.
Maximum pressure 4MPa in knockout drum, the upper and lower outlet diameter 2mm of balanced valve.So the pressure that valve inside and outside differential pressure generates
FP=4MPa∏(D0.002)2/4=12.56N；
Balanced valve outlet at bottom is opened, and needs to meet: FIt is floating—G—FP > 0;
Balanced valve top exit is opened, and needs to meet: G-FP > 0；
It is calculated by above-mentioned relation: if floating ball is using medicine ball: ρBall/ρLiquid< 0.5, obtain RBall> 84mm.If floating ball uses
When hollow sphere, R can be obtainedBall> 84mm.So floating ball selection specific gravity is greater than 1 Buddhist nun's human relations material, preferably float ball external diameter R=85mm, meter
Calculate to obtain the hollow radius r=70mm of floating ball.
(3) coaxial float-controlled valve and balanced valve working principle are as follows:
Coaxial float-controlled valve uses interlocking-type float, and when exhaust close, leakage fluid dram keeps clear；When leakage fluid dram is closed, row
Port keeps clear.Air inlet, the inlet of coaxial float-controlled valve are connected to the gas outlet of knockout drum, liquid outlet with pipeline, are constituted
Linker.Balanced valve is connected to float-controlled valve, equally constitutes linker.
When separator liquid level is in normal level, floating ball suspends, and leakage fluid dram and the exhaust outlet of valve keep clear.Air inflow
Hour, liquid inlet volume is very big.When liquid level rises to highest liquid level, floating ball rises with liquid level, and floating ball closes exhaust outlet.Due to balance
Valve upper outlet is lower than coaxial float valve outlet, so balanced valve upper outlet is closed in advance by floating ball.Due to coaxial float
After valve is closed, the inside and outside pressure difference for forming maximum 4MPa of exhaust outlet, exhaust outlet is remained off.
When liquid level is reduced to the normal level to be, balanced valve float is not by buoyancy, and in G-FP Under the action of > 0,
Balanced valve upper outlet is opened.It is connected to coaxial float valve outlet pipeline, exhaust outlet inside and outside differential pressure is eliminated, and floating ball is in gravity
Lower automatic opening exhaust outlet.
Similarly, when air inflow is very big, liquid inlet volume reduces.Liquid level is gradually decrease to design minimum liquid level, and coaxial float point is floating
Ball closes leakage fluid dram with liquid level downlink.Since balanced valve outlet at bottom is higher than coaxial float-controlled valve leakage fluid dram, so declining in liquid level
Balanced valve bottom is closed in advance in the process.After being closed due to coaxial float-controlled valve leakage fluid dram, leakage fluid dram is inside and outside to form maximum 4MPa's
Pressure difference, leakage fluid dram remain turned-off.Liquid level is gradually increasing, and when liquid level rises to normal level, balanced valve float is in FIt is floating—G—
FP Under the action of > 0, outlet at bottom is opened, and is connected to coaxial float-controlled valve leakage fluid dram pipeline, floating ball is in FIt is floating> G acts on lower leakage fluid dram and opens
It opens.
Embodiment 3:
Based on the structure in above-mentioned two embodiment, it is steady that liquid level is equipped in the present embodiment, at the liquid outlet 7 of knockout drum bottom
Device 6 is determined, as shown in figure 5, the liquid level stabilizing device 6 is the tubular column structure closed at one end being laterally arranged, the bottom side of tubing string
It is evenly distributed with feed liquor aperture, the outlet of tubing string end is connected to liquid outlet 7.It is equipped at gas outlet 12 at the top of knockout drum and catches mist
Device 11.Separator also connects a safety valve 10 by pipeline, and the exhaust pipe county that the coaxial float-controlled valve 13 connects passes through one
A by-pass line is connected to safety valve 10.
Knockout drum liquid outlet 7 will form spill whirlpool in drain, inhale volume gas stream.Spill whirlpool is bigger, and gas phase is inhaled volume and got over
Severity, gas-coning phenomena are more serious.So liquid level stabilizing device is arranged in liquid outlet, so that the whirlpool of very little is formed when drain, to liquid level
Almost without influence.Rather than a spill Maelstrom involves liquid level suction volume gas phase, causing gas coning leads to liquid outlet outlet.
Liquid level stabilizing device structure is as shown in Figure 5.In order to reduce liquid outlet whirlpool to greatest extent, liquid level stabilizing device is carried out
Design calculates.
Known according to hydrodynamics small hole stream, the whirlpool very little that hole diameter generates when being 4mm, pressure drop is suitble to.So excellent
Select 4mm aperture.It is calculated by the equivalent diameter in hole: de=d；(wherein de is liquid outlet diameter, and d is to be distributed in liquid level stabilizing device
Hole diameter).35=4, aperture number is n=76.
In conclusion it is 35mm that liquid level stabilizing device, which is internal diameter, the tubular column structure of a length of 1m, bottom side is evenly distributed with 76
Diameter is the inlet opening of 4mm, is horizontally arranged, connect with liquid outlet pipeline.
Embodiment 4:
Go out liquid to solve high-pressure separator gas outlet, the problem of liquid outlet outlet and normal pressure separator separating capacity deficiency,
The present embodiment is separated using high pressure, and the key of high pressure separation success or not is control separator pressure inside the tank, stablizes separator work
Make pressure.
For solve high-pressure separator because pressure inside the tank control it is improper caused by gas outlet take liquid, liquid outlet arranges one because of gas coning
Point liquid will gas-liquid with go out the problem of.The present embodiment is equipped with feed liquor electric controlled regulating valve 2 using the inlet of knockout drum, at leakage fluid dram
Exhaust electric controlled regulating valve 17 is equipped with equipped with drain electric controlled regulating valve 14, exhaust ports.
The present embodiment adopts PLC controller and adjusts electric controlled regulating valve, and high-pressure gas-liquid separation control device further includes a PLC control
Device processed, the PLC controller respectively with pressure gauge, gas flowmeter 18, fluid flowmeter 15, magnetic double level gauge 8, feed liquor
Electric controlled regulating valve 2, leakage fluid dram electric controlled regulating valve 14, exhaust outlet electric controlled regulating valve connection 17, temperature, pressure transmitter 9 connect.
PLC controller includes the monitoring modular for monitoring separator data, monitoring data is carried out with operational analysis and makes fortune
The display module of computing module, the execution module and display operation and regulation result that execute algorithm that fortune-telling enables.
PLC controller adjusts electric controlled regulating valve, while improving separator pressure inside the tank, stablizes separator work pressure,
When PLC controller monitors that gas phase flow velocity is greater than permissible velocity of flow in knockout drum, illustrate that gas-liquid separation ability declines, PLC controller
Increase exhaust outlet electric controlled regulating valve and the automatically controlled adjusting partial pressure force value 0.1MPa of leakage fluid dram simultaneously, gas phase is after pressure increase, volume
Compression, flow velocity reduce, and flow velocity is reduced to the permissible velocity of flow under work at present pressure, and separator reenters normal discrete state.
When PLC controller monitors that separator pressure inside the tank is higher than 4MPa, PLC controller adjusts inlet electric controlled regulating valve, reduces
Liquid inlet volume, by the control of separator work pressure within 4MPa.
Knockout drum leakage fluid dram and exhaust outlet electric controlled regulating valve take PLC to control synchronous adjustment, it is therefore an objective to improve separator work
Make to stablize pressure inside the tank while pressure.
Embodiment 5:
When acidification of gas well drain, well head pressure variation is gradually increased to 30mpa since 0mpa, then is gradually decrease to 0mpa,
Finally return back to 20mpa.Correspondingly, it is liquid that well head, which returns drain almost all, when initial, flow be 1 side/point.Gas phase is opened later
It is gas phase that beginning, which gradually increases to almost all, and flow is 100,000 sides/day.Last gas liquid ratio gradually tends to 50%.Therefore, it is necessary to roots
Separator work pressure is adjusted in real time according to well head gas liquid ratio.
The present embodiment provides a kind of control methods of high-pressure gas-liquid separation control device, as shown in Fig. 2, according to the following steps
It carries out:
(1) separator initialization pressure 0.1MPa is set, pressure amplification 0.1MPa is set；
(2) PLC controller monitoring modular real-time monitoring separator work pressure P, liquid level h, 18 moisture content of gas flowmeter
With 15 race conditio of fluid flowmeter；
(3) it if PLC controller monitoring modular detects that fluid flowmeter 15 and gas flowmeter 18 are working properly, ties in advance
Beam control system；
(4) if PLC controller monitoring modular detects 18 moisture content of gas flowmeter height or 15 disorder of fluid flowmeter, and
Signal is transmitted to PLC controller execution module, controls feed liquor electric controlled regulating valve 2, reduces liquid inlet volume by operating pressure P > 4MPa；
(5) if PLC controller monitoring modular detects 18 moisture content of gas flowmeter height or 15 disorder of fluid flowmeter, and
Operating pressure P < 4MPa；PLC controller computing module receives the signal and data of PLC controller monitoring modular, calculates separation
Gas phase flow velocity V and the gas phase permissible velocity of flow Vc under corresponding operating pressure in device tank；
(6) PLC controller computing module compares V and Vc size: if V < Vc, PLC controller execution module does not receive letter
Number, while " valve error " signal, and warning note are fed back to PLC controller display module；If V > Vc, PLC controller is executed
Module receives signal, increases drain electric controlled regulating valve (14) and exhaust 17 pressure 0.1MPa of electric controlled regulating valve；
(7) PLC controller computing module receives signal, separator work pressure P more adjusted after pressure adjustment1
With former separator work pressure P；If P1- P < 0.1, PLC controller computing module feeds back " pressure is not adjusted " signal to be controlled to PLC
Device display module processed and warning note, at this point, by way of manually controlling solenoid valve while increasing drain electric controlled regulating valve 14
With exhaust 17 pressure 0.1MPa of electric controlled regulating valve；If P1- P >=0.1MPa, PLC controller monitoring modular detect gas stream at this time
15 race conditio of 18 moisture content of meter and fluid flowmeter, and signal is fed back into display module；
(8) if PLC controller display module shows abnormal, repetition step (4) to (7)；If PLC controller display module
Display is normal, finishing control.
Wherein, gas flowmeter real time measure gas discharge q1 transmits a signal to PLC controller computing module.Pressure
Power transmitter real-time monitoring separator work pressure p, transmits a signal to computing module and calculates the permission under operating pressure
The size relation of flow velocity Vc and actual flow velocity v.
Magnetic double level gauge real-time monitoring separator liquid level h, transmits a signal to PLC controller computing module, meter
Gas phase actual internal area A is calculated, calculation formula is as follows: A=3.14r2/8+ .Further meter
Calculate gas phase flow velocity V=q1/A in knockout drum.
PLC controller computing module compares the permissible velocity of flow size relation under gas phase flow velocity and relevant work pressure, will believe
Number feed back to execution module.Permissible velocity of flow Vc calculation formula is as follows: Vc=0.7 (L/ (1-h) D) VL, droplet settling VL=Reμg/dρg 。
Know by calculating, gas-liquid separation Reynolds number in 100,000 sides of gas phase flow rate/day is in transition region, and calculation formula is as follows: Re=0.153
Ar0.714, Ar=d3(ρL-ρg)gρg/μg 2.Above formula as gas phase permissible velocity of flow calculation formula under real-time working pressure, as
PLC controller programs foundation.
In conclusion this high-pressure gas-liquid separation control device provided by the invention and its control method, solve low pressure
Separator separating capacity deficiency and high-pressure separator manual control outlet valve opening degree cause gas outlet to go out liquid, liquid outlet outlet
Problem.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for the member of ordinary skill of the technical field of the invention, is not departing from
Under the premise of present inventive concept, several simple deduction or replace can also be made, such as horizontal knockout drum are changed to vertical
Knockout drum uses similar control device and method, all shall be regarded as belonging to the present invention and is determined specially by the claims submitted
Sharp protection scope.
Claims (9)
1. a kind of high-pressure gas-liquid separation control device, including knockout drum, knockout drum is connected with feed liquor pipeline, is provided on knockout drum
Liquid outlet (7), gas outlet (12) and sewage draining exit (5), it is characterised in that:
The feed liquor pipeline is equipped with pressure transmitter (1) and feed liquor electric controlled regulating valve (2), the feed liquor pipeline connection
Cowling panel (3) are equipped at knockout drum inlet；
The sewage draining exit (5) connects blowdown pipeline, and blowdown pipeline is equipped with manual modulation valve (4)；
The liquid outlet (7), gas outlet (12) are connected coaxial float-controlled valve (13) by pipeline respectively, and coaxial float-controlled valve (13) is even
Then balanced valve (16)；Exhaust line (29) are connected at the top of the coaxial float-controlled valve (13), bottom connected drainage pipeline (27),
Tapping line (27) is equipped with drain electric controlled regulating valve (14) and fluid flowmeter (15), and exhaust line (29) is equipped with exhaust electricity
Control regulation valve (17) and gas flowmeter (18), exhaust line (29) are connected to burner (19)；
Magnetic double level gauge (8) and temperature, pressure transmitter (9) are also equipped on the knockout drum；
The coaxial float-controlled valve (13) uses interlocking-type float, and coaxial float-controlled valve (13) includes the coaxial float-controlled valve of coaxial package
Shell (23) and coaxial float-controlled valve inner casing (22), coaxial float valve shell (23) upper and lower part be respectively set coaxial float-controlled valve into
Port (20) and coaxial float-controlled valve inlet (21) are uniformly distributed coaxial float-controlled valve inlet opening on coaxial float-controlled valve inner casing (22)
(24), coaxial float-controlled valve inner casing (22) is built-in with coaxial float-controlled valve float (25), and coaxial float-controlled valve float (25) is floating ball or circle
Coaxial float valve outlet (28) and coaxial float-controlled valve drain is respectively set in cylinder, coaxial float-controlled valve inner casing (22) top and bottom end
Mouth (26), coaxial float valve outlet (28) and coaxial float-controlled valve leakage fluid dram (26) are separately connected exhaust line (29) and drain pipe
Line (27).
2. high-pressure gas-liquid separation control device as described in claim 1, it is characterised in that: the coaxial float-controlled valve (13),
Balanced valve (16) is mounted on outside knockout drum, the air inlet of the coaxial float-controlled valve (13) and the highest liquid level of separator interior
Equal, the inlet of coaxial float-controlled valve (13) is lower than the minimum level of separator interior.
3. high-pressure gas-liquid separation control device as claimed in claim 1 or 2, it is characterised in that: balanced valve (16) packet
The balance valve shell (31) and balanced valve inner casing (32) of coaxial package are included, balanced valve inlet is arranged in balance valve shell (31) lower part
(30), it is evenly distributed with balanced valve inlet opening (33) on balanced valve inner casing (32), it is floating that balanced valve inner casing (32) is built-in with balanced valve
Sub (34), balanced valve float (34) are floating ball or cylindrical body, and balanced valve row is respectively set in balanced valve inner casing (32) top and bottom end
Port (35) and balanced valve leakage fluid dram (36) balance valve outlet (35) and balanced valve leakage fluid dram (36) and pass through high pressure tubule respectively
Line (37) connects exhaust line (29) and tapping line (27).
4. high-pressure gas-liquid separation control device as claimed in claim 1 or 2, it is characterised in that: the knockout drum bottom
Liquid level stabilizing device (6) are equipped at liquid outlet (7), the liquid level stabilizing device (6) is the tubing string knot closed at one end being laterally arranged
Structure, the bottom side of tubing string are evenly distributed with feed liquor aperture, and the outlet of tubing string end is connected to liquid outlet (7).
5. high-pressure gas-liquid separation control device as claimed in claim 1 or 2, it is characterised in that: at the top of the knockout drum
Mist eliminator (11) are equipped at gas outlet (12).
6. high-pressure gas-liquid separation control device as claimed in claim 1 or 2, it is characterised in that: the separator also passes through
Pipeline connects a safety valve (10), and the exhaust line of coaxial float-controlled valve (13) connection passes through a by-pass line and safety
Valve (10) connection.
7. high-pressure gas-liquid separation control device as described in claim 1, it is characterised in that: the high-pressure gas-liquid separates control
Device further includes a PLC controller, the PLC controller respectively with pressure gauge, gas flowmeter (18), fluid flowmeter
(15), magnetic double level gauge (8), feed liquor electric controlled regulating valve (2), drain electric controlled regulating valve (14), exhaust electric controlled regulating valve (17),
Temperature, pressure transmitter (9) connection.
8. high-pressure gas-liquid separation control device as claimed in claim 7, it is characterised in that: the PLC controller includes prison
The monitoring modular of separator data is surveyed, monitoring data are carried out with operational analysis and makes the computing module of algorithm, execute fortune
The execution module enabled of telling the fortune and display operation and the display module for regulating and controlling result.
9. the control method of high-pressure gas-liquid separation control device as described in claim 1, which is characterized in that according to the following steps
It carries out:
(1) separator initialization pressure 0.1MPa is set, pressure amplification 0.1MPa is set；
(2) PLC controller monitoring modular real-time monitoring separator work pressure P, liquid level h, gas flowmeter (18) moisture content with
Fluid flowmeter (15) race conditio；
(3) it if PLC controller monitoring modular detects that fluid flowmeter (15) and gas flowmeter (18) are working properly, ties in advance
Beam control system；
(4) if PLC controller monitoring modular detects gas flowmeter (18) moisture content height or fluid flowmeter (15) disorder, and
Signal is transmitted to PLC controller execution module, controlled feed liquor electric controlled regulating valve (2), reduces feed liquor by operating pressure P > 4MPa
Amount；
(5) if PLC controller monitoring modular detects gas flowmeter (18) moisture content height or fluid flowmeter (15) disorder, and
Operating pressure P < 4MPa；PLC controller computing module receives the signal and data of PLC controller monitoring modular, calculates separation
Gas phase flow velocity V and the gas phase permissible velocity of flow Vc under corresponding operating pressure in device tank；
(6) PLC controller computing module compares V and Vc size: if V < Vc, PLC controller execution module wave-off, together
When give PLC controller display module to feed back " valve error " signal, and warning note；If V > Vc, PLC controller execution module connect
The collection of letters number increases drain electric controlled regulating valve (14) and exhaust electric controlled regulating valve (17) pressure 0.1MPa；
(7) PLC controller computing module receives signal, separator work pressure P more adjusted after pressure adjustment1With original point
From device operating pressure P；If P1- P < 0.1, it is aobvious to PLC controller that PLC controller computing module feeds back " pressure is not adjusted " signal
Show module and warning note, at this point, by way of manually controlling solenoid valve while increasing drain electric controlled regulating valve (14) and row
Pneumoelectric control regulation valve (17) pressure 0.1MPa；If P1- P >=0.1MPa, PLC controller monitoring modular detect gas flow at this time
(18) moisture content and fluid flowmeter (15) race conditio are counted, and signal is fed back into display module；
(8) if PLC controller display module shows abnormal, repetition step (4) to step (7)；If PLC controller display module
Display is normal, finishing control.
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| CN108034468B (en) * | 2017-12-21 | 2024-02-27 | 银球节能工程有限公司 | Quick-opening full-opening type natural gas-liquid separator |
| CN108480068A (en) * | 2018-01-23 | 2018-09-04 | 博迈科海洋工程股份有限公司 | A kind of Pipe String Cyclone Gas-liquid Separator of adjustable float automatic liquid level control |
| CN108488471A (en) * | 2018-05-08 | 2018-09-04 | 西安石油大学 | A kind of adjustable bidirectional float-controlled valve and its working method |
| CN108625848B (en) * | 2018-06-07 | 2024-03-01 | 中国石油天然气集团公司 | Unpowered automatic liquid discharge metering device and metering method thereof |
| CN109989738A (en) * | 2019-04-11 | 2019-07-09 | 燕山大学 | A kind of intelligent gas-phase emission control device and method for gas-liquid separator |
| CN113444552B (en) * | 2020-03-27 | 2024-06-18 | 中国石油化工股份有限公司 | Automatic flowing back system of double-acting type separator |
| CN112324432B (en) * | 2020-11-30 | 2022-03-08 | 中国石油集团渤海钻探工程有限公司 | Gas well wellhead prying and liquid sampling device |
| CN115325179B (en) * | 2022-07-04 | 2023-06-06 | 浙江安构控制阀科技有限公司 | Liquid-gas separation discharge method and regulating valve with same |
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