CN208918522U - A kind of slug flow trapping system based on low pressure receiver - Google Patents
A kind of slug flow trapping system based on low pressure receiver Download PDFInfo
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Abstract
The utility model discloses a kind of slug flow trapping system based on low pressure receiver, system includes the gas-liquid high pressure separation system that main road is connected into and high pressure separate pipeline system, middle pressure separate pipeline system and low pressure collections system that bypass is successively connected into, liquid phase fast drain system, the liquid phase fast drain system connection gas-liquid high pressure separation system and middle pressure separate pipeline system are set between high pressure separate pipeline system downstream and gas-liquid high pressure separation system.Compared with prior art, the good effect of the utility model is: the rule that the utility model is formed based on slug flow, in conjunction with the frequency feature that slug flow occurs, consider economically to solve slug flow storage problem using the process of Quick gas-liquid separation, liquid phase decompression, the discharge of vacuum flashing gas and low pressure gas storage when guaranteeing to stablize gas-liquid separation process and slug flow operating condition using production separator when nominal situation；Substitute the Large-scale High-Pressure slug catcher of high investment.
Description
Technical field
The utility model relates to a kind of slug flow trapping system based on low pressure receiver.
Background technique
As gas field development continues to develop, gathering system faces lot of challenges.For using gas-liquid delivery production model
It for fortune field, into after the production later period, is influenced by yield failure and gas-water ratio reduction, hydrops increases in multiphase pipeline, especially
It is for connection gathering system gas gathering station to the gathering line of central processing factory, and often caliber is larger, length is longer, therefore pipeline
Middle hydrops amount is larger；Similarly, for newly-built gas field, the problem of being also faced with slug flow programme planning at a specified future date.Slug flow problem
During being mainly reflected in the regular pigging of pipeline, proposing production, restart, these operations cause pipe outlet instantaneous a large amount of liquid occur
Body, it is necessary to necessary slug flow receiving device be set in gas field processing unit upstream, big quantity of fluid is avoided to enter natural gas production
Processing system.It can be seen that the design and optimization of slug flow trapping system is particularly significant to built and newly-built gas field.
Currently, mainly including from hydrops discharge mode and setting for the design and scheme of collection gas transmission field slug catcher
It is standby to receive two aspects and start with optimization.The former mainly includes being controlled by extending pigging, the time of operations such as proposing production, restart
The velocity of discharge of pipe end slug flow, while increasing trap downstream liquid phase processing capacity, to a certain extent smaller high pressure
Liquid storage volume, the lesser trap volume of final choice size；The latter mainly starts with from trap pattern, according to required slug flow
Volume is trapped to consider trap pattern (positive displacement trap and multitube trap), positive displacement trap is suitable for slug flow
The operating condition of small volume, and multitube trap is suitable for the larger situation of slug flow volume, high investment.It is either current
Positive displacement trap or multitube slug catcher are thought of as and the consistent high-pressure bottle of upstream pressure grade system or pipe
Road, it is universal higher which results in slug catcher investments.In fact, slug catcher is after mounting, using long-time as
Gas-liquid separator uses, and the frequency for being used to trap slug flow is relatively extremely low, including pigging, propose production, restart etc. caused by section
Plug, belongs to provisional plan operating condition.Therefore, it is further contemplated that optimization technique, using low-voltage equipment and pipeline to planned section
Plug flow is collected and handles, and reduces construction investment and equipment use cost, is also further gas field later period slug stream load mistake
Modification measures that are high and taking provide reference and reference.
Summary of the invention
The shortcomings that in order to overcome the prior art, the utility model provide a kind of slug flow trapping system based on low pressure receiver
System, it is intended to further improve slug flow trapping technique and system.The utility model is based on gathering line slug flow and is formed and be discharged
Rule comprehensively considers existing slug flow trapping technique, from low pressure trapping system is increased to reduce the angle of engineering cost, mentions
Appropriateness setting separator out, expands the scheme of low pressure receiver system, realize function division, technically reliable, cost it is controllable, it is newly-built/
Extend standardized target.
The technical scheme adopted by the utility model is a kind of slug flow trapping system based on low pressure receiver, including master
Gas-liquid high pressure separation system that road is connected into and the high pressure separate pipeline system that bypass is successively connected into, middle pressure separate pipeline system and low
Collection system is pressed, liquid phase fast drain system is set between high pressure separate pipeline system downstream and gas-liquid high pressure separation system,
The liquid phase fast drain system connection gas-liquid high pressure separation system and middle pressure separate pipeline system.
Compared with prior art, the good effect of the utility model is:
The rule that the utility model is formed based on slug flow considers nominal situation in conjunction with the frequency feature that slug flow occurs
Depressurized when Shi Liyong production separator guarantees to stablize gas-liquid separation process and slug flow operating condition using Quick gas-liquid separation, liquid phase,
The process of the discharge of vacuum flashing gas and low pressure gas storage economically solves slug flow storage problem；Substitute the Large-scale High-Pressure of high investment
Slug catcher.
The utility model proposes slug flow countermeasures and solution based on different operating conditions, utilize gas to greatest extent
Liquid/gas separator carries out natural gas separation, and the slug catcher system that pressure duct is few, low pressure storage tank is big is rationally arranged, and avoids
Extensive high pressure slug flow capturing device is directly set, is reduced investment outlay, high-pressure system volume is also reduced.Specific manifestation are as follows:
(1) setting science
The utility model be based on advanced Forecast on Process sunykatuib analysis as a result, it is possible to reasonable computation and select normal production and
The size of the pipelines such as separator, multi-pipeline and storage tank and equipment when slug flow operating condition optimizes high-pressure system volume to greatest extent, closes
Reason is transferred to low-pressure system, meets high pressure separation during normal production and the trapping of a small amount of slug flows and quick pressure releasing when slug flow operating condition
The function of storage.
(2) economy is good
The more common slug flow trapping strategy of the utility model is most obvious difference is that " first trap and locate again passing
Reason " guides " pressure release is reprocessed in trapping " into, effectively utilizes manifold and low pressure storage tank carries out the gas of instantaneous high pressure slug flow
Liquid separation and liquid phase pressure release storage, eliminate the problem of large volume high-pressure bottle or tube storage slug flow is arranged, avoid as this
The lower operation of kind occurrence frequency puts into excessive expense.
(3) safe operation
The hp by-pass system of the utility model, high pressure separate pipeline system, middle pressure separate pipeline system are in continuous low
Load operating region establishes pressure system identical with slug flow operating condition, can carry out slug flow operating condition operation at any time；This is practical
Level monitoring, pressure monitoring and corresponding operation is arranged in multiple spot in novel logic control system, guarantees operations safety.
(4) it is suitble to later period reconstruction
Hp by-pass system, high pressure separate pipeline system, middle pressure separate pipeline system of the utility model etc. are easy and fast to
Construction, no special installation or valve, and its design concept can effectively cover the later period slug flow that current most of gas field faces
The problem of load is more than original separator trapping load, has great advantages in terms of exploitativeness, economy and safety.
Detailed description of the invention
The utility model will illustrate by example and with reference to the appended drawing, in which:
Fig. 1 is a kind of schematic diagram of slug flow trapping system based on low pressure receiver.
Specific embodiment
A kind of slug flow trapping system based on low pressure receiver, including gas-liquid high pressure separation system, liquid phase quick drain system
System, high pressure separate pipeline system, middle pressure separate pipeline system, low pressure collections system and logic control system etc..As shown in Figure 1,
Specifically include that entrance pipeline section 1, equal tee 2, electrical ball valve 3, high-pressure two-phase separator 4, gaseous phase outlet pipeline 5, electrical ball valve
6, liquid-phase outlet pipeline 7, electrical ball valve 8, liquid level sensor 9, pressure sensor 10, temperature sensor 11, regulating valve 12, high pressure
Two phase separator, electrical ball valve 14, regulating valve 15, bypass ball valve 16, bypass valve 17, liquid pipe 18, bypass main line 21,
Electrical ball valve 22, release valve ball 23, level-one branch piping 24, high-pressure multi-tube separation piping 25, high pressure vapor standpipe 26/28, height
Phase of calming the anger standpipe ball valve 27/29, the remittance of high pressure liquid level control pipe 30, high pressure liquid phase regulating valve 31/32, middle pressure pipeline 33, two fractions
Branch piping 34, middle pressure multitube separation piping 35, in calm the anger phase standpipe 36/37, in calm the anger phase standpipe ball valve 38/39, in calm the anger phase
General pipeline 40, the remittance of middle hydraulic fluid level control pipe 41, middle hydraulic fluid phase regulating valve 42/43, low pressure pipeline 44, three-level branch piping 45, low pressure
Multitube separate piping 46, low-pressure vapor phase standpipe 47/48, low-pressure vapor phase standpipe ball valve 49/50, low-pressure vapor phase general pipeline 51, low pressure into
Tank piping 52, atmospheric storage tank 53, safety valve 54/55/56, exhausting pipeline 57.
Wherein, electrical ball valve 3, high-pressure two-phase separator 4, gaseous phase outlet pipeline 5, electrical ball valve 6, liquid-phase outlet pipeline 7,
Electrical ball valve 8, liquid level sensor 9, pressure sensor 10, temperature sensor 11, regulating valve 12 form gas-liquid high pressure separation system,
It is responsible for carrying out gas-liquid separation in normal conditions；In the gas-liquid high pressure separation system, electrical ball valve 3 is full-bore electric ball
Valve, for being connected to or cutting off entrance pipeline section 1, unlatching/closing of electrical ball valve 3 is controlled by liquid level sensor 9；High-pressure two-phase separation
Device 4 is the horizontal type gas and liquid two phase separator being set in main process flow, for receiving upstream from air inlet main line during normal production
Medium (raw natural gas) has the function of gas-liquid separation and the trapping of a small amount of slug, and gas phase is through gaseous phase outlet pipeline 5, electric ball
Valve 6 enters downstream vapor phase treatment system, and liquid phase enters downstream liquid-phase treatment system through liquid-phase outlet pipeline 7, electrical ball valve 8；Institute
It states 4 bottom of high-pressure two-phase separator and the liquid phase fast drain system ozzle is set, ozzle bore is not less than DN200, for just
It is discharged on a small quantity under normal operating condition to middle pressure separate pipeline system big to middle pressure separate pipeline system under liquid phase and the initial operating condition of slug flow
Amount discharge liquid phase；Electrical ball valve 6/8 is opened or closed to be controlled by liquid level sensor 9.
In shown system, the electrical ball valve 3 is installed on 2 downstream of equal tee, airbreak installation；High-pressure two-phase separator 4
Regulating valve 12,15 and 17 is interlocked using " constant " Liquid level mode for horizontal pattern, is responsible for control drain age velocity, sets simultaneously
High liquid level and high high liquid level are set, electrical ball valve 3/14/22 is interlocked, is responsible for control medium flow direction；Liquid level sensor 9 is set using 2 tunnels
It sets, itself compares, mutually inspection；Pipeline access port at 2 is set between gaseous phase outlet pipeline 5 and electrical ball valve 6, for accessing high pressure point
Carry out gas from pipe-line system；The liquid phase fast drain system ozzle is arranged in 4 bottom of high-pressure two-phase separator, and ozzle bore is not
Less than DN200.
Wherein, liquid pipe 13, electrical ball valve 14, regulating valve 15, bypass ball valve 16, bypass valve 17, liquid pipe
18, safety valve 55 forms liquid phase fast drain system, is responsible for discharging liquid phase on a small quantity to middle pressure separate pipeline system under nominal situation
To maintain to discharge liquid phase largely to middle pressure separate pipeline system under system pressure and the initial operating condition of slug flow quickly to reduce high pressure
The liquid level of two phase separator 4.13 caliber of liquid pipe is not less than DN200；Constitute the electricity of liquid phase fast drain system main road
Dynamic ball valve 14 and regulating valve 15 are often to close, and in a large amount of discharges, are indicated to open by liquid level sensor 9, at the beginning of which is slug flow
The channel of liquid phase is largely discharged under beginning operating condition to middle pressure separate pipeline system；Constitute the bypass ball of liquid phase fast drain system bypass
Valve 16 and bypass valve 17 be it is normally opened, which is to discharge the logical of liquid phase on a small quantity to middle pressure separate pipeline system under nominal situation
Road；Safety valve 55 is spring loaded safety valve, is opened after 18 superpressure of liquid pipe, medium is arranged to total blowdown system；Liquid pipe
18 pumped (conveying) mediums are pressure regulation to the gas-liquid mixture of middle pressure, are delivered to middle pressure separate pipeline system.
In shown system, liquid pipe 13 connects 4 bottom ozzle of high-pressure two-phase separator, and low spot filtering and blowdown is arranged
Pipe nipple, so as to periodic cleaning；Main line (electrical ball valve 14, regulating valve 15) and bypass (ball valve 16, regulating valve 17) horizontal parallel
Installation, main line caliber are not less than DN200, and bypass caliber is DN100；18 Pressure level of liquid pipe after regulating valve 15 is
Middle rank, and in starting point lateral openings, safety valve 55 is set.
Wherein, the bypass main line 21, electrical ball valve 22, release valve ball 23, level-one branch piping 24, high-pressure multi-tube separation
Piping 25, high pressure vapor standpipe 26/28, high pressure vapor standpipe ball valve 27/29, the remittance of high pressure liquid level control pipe 30, high pressure liquid phase tune
It saves valve 31/32 and forms high pressure separate pipeline system, be responsible under slug flow operating condition carrying out high pressure point to the come medium of entrance pipeline section 1
From, pressure regulation.
In shown system, the bypass main line 21 connects equal tee 2；The electrical ball valve 22 is normal status, big
When amount discharge, indicated to open by liquid level sensor 9；The release valve ball 23 is normally open, is responsible for restricted when nominal situation
1% yield medium is introduced, for maintaining downstream installation to be in underload operating status with pressure；The bypass main line 21, electric ball
Valve 22 (main line ball valve), release valve ball 23 (bypass valve) form hp by-pass system；Level-one branch piping 24 is " 1
Divide 2 " type symmetric designs, guarantee that assignment of traffic is uniform, numbers of branches is 4 tunnels or 8 tunnels；The first order branch piping absolute altitude
Higher than high pressure turbine by pipeline (i.e. bypass main line 21) 3m or more, to provide installation space for downstream Liquid level manifold；It is described
High-pressure multi-tube separates piping 25 without inclination, and single pipe is interior to allow gas superficial flow velocity to be no more than 0.5m/s, and thereby determines that pipe
Diameter, the of length no more than 10m of single conduit；The high pressure liquid level control pipe remittance 30 is installed on high-pressure multi-tube separation 25 end of piping,
It is accessed downwards through bend pipe, caliber is 1m or more, and installs fluid level transmitter, is interlocked with high pressure liquid phase regulating valve 31/32, and control is responsible for
Liquid level processed；The high pressure liquid phase regulating valve 31/32 is installed on the horizontal straight tube after the bend pipe connected below Liquid level manifold,
Number is 2, and pipeline is installed upwards after regulating valve, to provide installation space for downstream Liquid level manifold；The high pressure gas
Phase standpipe 26/28 be 2 tunnels, respectively at 75% and 100% length of multiple-way duct upward opening, be connected into gas-liquid separator gas phase
Outlet conduit.The downstream of the high pressure separate pipeline system is medium pressure separate pipeline system.
Wherein, medium pressure pipeline 33, second level branch piping 34, middle pressure multitube separation piping 35, in calm the anger phase standpipe 36/
37, phase of calming the anger in standpipe ball valve 38/39, in calm the anger phase general pipeline 40, middle hydraulic fluid level control pipe converge 41, middle hydraulic fluid phase regulating valve 42/
Separate pipeline system is pressed in 43 compositions, is responsible for carrying out train reduction, gas to the middle pressure medium under nominal situation and slug flow operating condition
Liquid separation, liquid phase pressure regulation, liquid phase are reallocated, and the system that the barometric gradient is arranged is to slow down regulating valve disposably excessive pressure difference
Caused serious cavitation and the flash distillation of excessive gas.
In shown system, second level branch piping 34 is " 1 point 2 " type symmetric design, guarantees that assignment of traffic is uniform, point
Number is 4 tunnels；The second level branch piping absolute altitude is higher than the absolute altitude 3m or more of middle pressure pipeline 33, to be downstream liquid level control
Tubulation, which converges, provides installation space；Medium pressure multitube separates piping 35 without inclination, and single pipe is interior to allow gas superficial flow velocity not
More than 0.5m/s, and thereby determine that caliber, the of length no more than 10m of single conduit；Medium pressure Liquid level manifold 41 is installed on
Middle pressure multitube separates 35 end of piping, accesses downwards through bend pipe, and caliber is 1m or more, and installs fluid level transmitter, with middle hydraulic fluid
Phase regulating valve 42/43 interlocks, and is responsible for control liquid level；Medium pressure liquid phase regulating valve 42/43 is installed below Liquid level manifold
On horizontal straight tube after the bend pipe connected, number is 2, and pipeline is installed upwards after regulating valve, to be downstream Liquid level pipe
It converges and installation space is provided；Medium pressure gas phase standpipe 36/37 be 2 tunnels, respectively at 75% and 100% length of multiple-way duct to
Upper opening is connected into medium pressure gas processing system.The downstream of medium pressure separate pipeline system is the low pressure collections system.
Wherein, low pressure pipeline 44, three-level branch piping 45, low pressure multitube separation piping 46, low-pressure vapor phase standpipe 47/48,
Low-pressure vapor phase standpipe ball valve 49/50, low-pressure vapor phase general pipeline 51, low pressure tube for entering can system 52, atmospheric storage tank 53 form low pressure collections system
System.The low pressure collections system is spare in normal conditions, enables rapidly under slug flow operating condition, is responsible for that Jie of normal pressure will be modulated
Matter after gas-liquid separation, is sent to atmospheric storage tank storage, and gas phase enters blowdown system.
In shown system, three-level branch piping 45 is " 1 point 2 " type symmetric design, guarantees that assignment of traffic is uniform, point
Number is 4 tunnels；The third level branch piping absolute altitude is higher than the absolute altitude 3m or more of low pressure pipeline 44, to utilize enhancing of climbing
Gas-liquid separation；For the low pressure multitube separation piping 46 without inclination, single pipe is interior to allow gas superficial flow velocity to be no more than 0.5m/s,
And thereby determining that caliber, single conduit of length no more than 10m after pipeline converges in end, enters normal pressure through low pressure pipeline 52 and stores up
Tank 53；The low-pressure vapor phase standpipe 47/48 is 2 tunnels, respectively upward opening, company at 75% and 100% length of multiple-way duct
Enter low-pressure gas processing system.
Wherein, safety valve 54,55,56 and the composition emptying auxiliary system of exhausting pipeline 57, are responsible for different pressures grade tubulation
The offer pressure protection measure of road system, safety valve 54 and safety valve 55 set pressure as middle pressure grade；The setting of safety valve 56
Pressure is low pressure grade.
Wherein, electrical ball valve 3, electrical ball valve 6, electrical ball valve 8, liquid level sensor 9, pressure sensor 10, temperature sensing
Device 11, regulating valve 12, electrical ball valve 14, regulating valve 15, bypass valve 17, electrical ball valve 22, release valve ball 23, high pressure liquid level
Control manifold 30, high pressure liquid phase regulating valve 31/32, middle hydraulic fluid level control pipe remittance 41, middle hydraulic fluid phase regulating valve 42/43 form completely
Logic control system, the medium flow direction under comprehensively control nominal situation, a small amount of slug flow operating conditions and slug flow operating condition, valve are opened
It closes.
The working principle and the course of work of the utility model are as follows:
(1) this system being capable of the complete operating condition that faces of overall treatment natural gas processing front end, gathering system end, comprising:
Normal production status (the uniform Mixed design of gas-liquid), a small amount of slug flow operating conditions (gas-liquid mixed input, liquid phase accounting significantly increase)
With slug flow operating condition (gas-liquid mixed input, gas phase ratio are minimum).
(2) in normal production status, upstream medium mainly passes through entrance pipeline section 1 and enters high-pressure two-phase separator 4, carries out
Normal gas-liquid separation；In production, the gas phase after separation enters gas downstream processing system, liquid phase through gaseous phase outlet pipeline 5
Enter downstream liquid processing system through liquid-phase outlet pipeline 7.Meanwhile in order to guarantee slug flow trapping system (high pressure separate pipeline
System, middle pressure separate pipeline system) barometric gradient and operating status are established, a small amount of be situated between is introduced to the system at equal tee 2
Matter (is no more than 1%), and medium averagely enters high-pressure multi-tube after bypass ball valve 23,24 water conservancy diversion of level-one branch piping and separates piping
25, velocity of medium reduces, and separation is simulated in horizontal pipe, and gas phase enters the gas of high-pressure two-phase separator 4 from 2 tunnel gas phase standpipes
Phase outlet conduit 5 avoids wasting；Liquid phase enters high pressure liquid level control pipe remittance 30；High pressure liquid level control pipe remittance 30 keeps 50% liquid
Position control, the function of playing arrival liquid buffering and stagnate；Through high pressure liquid phase regulating valve 31/32, high pressure liquid phase is depressurized to middle pressure etc.
Part flashed vapour and remaining liquid phase is precipitated in grade；Medium presses multitube separating pipe in averagely entering after 34 water conservancy diversion of second level branch piping
It is 35, velocity of medium reduces, and separation is simulated in horizontal pipe, and gas phase enters the processing of downstream medium pressure gas from 2 tunnel gas phase standpipes
System avoids wasting；Hydraulic fluid level control pipe remittance 41 in liquid phase entrance；Middle hydraulic fluid level control pipe remittance 41 keeps 50% Liquid levels,
The function of playing arrival liquid buffering and stagnate, liquid phase do not enter down stream low pressure stocking system, flashed vapour are avoided to waste, but enter liquid
Middle press liquid processing system of the phase pipeline 7 after pressure regulation.In normal conditions, low pressure collections system is in stand-by state, is not necessarily to
Back pressure is established in advance.To guarantee that liquid pipe 13,18 service condition of liquid pipe are good, bypass ball valve 16, test are periodically turned on
Tube performance.
(3) in a small amount of slug flow operating conditions, more liquid phase enters high-pressure two-phase separator 4, and liquid level reaches " high liquid level
Afterwards ", electrical ball valve 14 and regulating valve 15 are opened, liquid is quickly discharged into middle pressure pipeline 33.Remaining operating principle is the same as (2).In addition,
Increase due to carrying out liquid, may cause middle hydraulic fluid level control pipe, to converge 30 Liquid levels excessively high, can open low pressure collections system, carry out liquid
Position control.Liquid phase and a small amount of flashed vapour averagely enter low pressure multitube after 45 water conservancy diversion of three-level branch piping and separate piping 46, medium
Flow velocity reduces, and separation is simulated in horizontal pipe, and gas phase enters down stream low pressure gas handling system from 2 tunnel gas phase standpipes；Liquid phase
It is stored into atmospheric storage tank 53.
(4) in a large amount of slug flow operating conditions, more liquid phase enters high-pressure two-phase separator 4, and liquid level reaches " high liquid
Behind position ", electrical ball valve 3 is closed immediately, opens electrical ball valve 22, medium is fully incorporated slug flow trapping system；It opens simultaneously
Liquid is quickly discharged into middle pressure pipeline 33 by electrical ball valve 14 and regulating valve 15, to reduce the liquid level of high-pressure two-phase separator 4.Its
Remaining operating principle is the same as (2).In addition, increasing due to carrying out liquid, Ying Kaiqi low pressure collections system, Liquid level is carried out.Liquid phase and a small amount of
Flashed vapour averagely enters low pressure multitube after 45 water conservancy diversion of three-level branch piping and separates piping 46, and velocity of medium reduces, in horizontal tube
Separation is simulated in road, gas phase enters down stream low pressure gas handling system from 2 tunnel gas phase standpipes；Liquid phase enters the storage of atmospheric storage tank 53
It deposits.
(5) since pressure change occurs, it is provided with safety valve 54/55/56, rapidly arranges medium to putting in superpressure
Empty set system.
(6) after slug flow, process shown in (1) is re-started.
The method for carrying out safety catch using the above-mentioned slug flow trapping system based on low pressure receiver, includes the following steps:
Step 1: in normal production status, opening electrical ball valve 3, and upstream medium is introduced high-pressure two-phase separator 4,
Normal gas-liquid separation is carried out, while opening gaseous phase outlet pipeline 5 and liquid-phase outlet pipeline 7；Bypass ball valve 23 is opened, is allowed few
Amount medium enters bypass trapping system；Bypass ball valve 16, bypass valve 17 are opened, allows to press segregative line in a small amount of liquid phase entrance
System；Open the valve of high pressure separate pipeline system, middle pressure separate pipeline system；Reheat control valve 42/43 is closed, partition low pressure is received
Collecting system.Safety valve 54/55/56 is kept to open.
Step 2: a small amount of slug flows enter system, after gas-liquid separator liquid level rises to high liquid level, open liquid phase and quickly arrange
The electrical ball valve 14 and regulating valve 15 of place system, liquid phase quickly enter middle pressure separate pipeline system；It is middle pressure separation after gas phase into
Enter middle pressure vapor phase treatment system；Liquid phase is pumped to middle pressure liquid-phase treatment system.In addition, if middle hydraulic fluid level control pipe 30 liquid level controls of remittance
It makes excessively high, then opens reheat control valve 42/43, open low pressure collections system, carry out Liquid level, get through low pressure collections system,
Liquid phase enters atmospheric storage tank 53, and gas phase enters down stream low pressure gas handling system.
Step 3: a large amount of slug flows enter system, and more liquid phase enters high-pressure two-phase separator 4, and liquid level reaches " high
After high liquid level ", electrical ball valve 3 is closed immediately, opens electrical ball valve 22, medium is fully incorporated slug flow trapping system；Simultaneously
Electrical ball valve 14 and regulating valve 15 are opened, liquid is quickly discharged into middle pressure pipeline 33, to reduce by 4 liquid level of high-pressure two-phase separator.
Liquid phase quickly enters middle pressure separate pipeline system；Gas phase after middle pressure separation presses vapor phase treatment system in entering；It presses and adjusts in unlatching
Valve 42/43 is saved, low pressure collections system is opened, Liquid level is carried out, gets through low pressure collections system, liquid phase enters atmospheric storage tank 53,
Gas phase enters down stream low pressure gas handling system.
Step 4: after slug flow, electrical ball valve 14/22 is closed, opens electrical ball valve 3, is transported according to described in step 1
Row.
So far, the slug flow trapping process based on low pressure receiver terminates.
Claims (7)
1. a kind of slug flow trapping system based on low pressure receiver, it is characterised in that: the gas-liquid high pressure separation being connected into including main road
High pressure separate pipeline system, middle pressure separate pipeline system and the low pressure collections system that system and bypass are successively connected into, in high pressure point
From setting liquid phase fast drain system, the liquid phase fast drain system between pipe-line system downstream and gas-liquid high pressure separation system
It is connected to gas-liquid high pressure separation system and middle pressure separate pipeline system.
2. a kind of slug flow trapping system based on low pressure receiver according to claim 1, it is characterised in that: the gas-liquid
High pressure separation system includes high-pressure two-phase separator and the electrical ball valve that is arranged on entrance pipeline section, in high-pressure two-phase separator
Electrical ball valve is set on gaseous phase outlet pipeline, electrical ball valve and adjusting are set on the liquid-phase outlet pipeline of high-pressure two-phase separator
Valve.
3. a kind of slug flow trapping system based on low pressure receiver according to claim 2, it is characterised in that: the liquid phase
Fast drain system includes the electric ball that the liquid pipe of high-pressure two-phase separator bottom is arranged in and is arranged on liquid pipe
Valve and regulating valve, and the bypass ball valve and bypass valve that are arranged on the bypass duct of liquid pipe.
4. a kind of slug flow trapping system based on low pressure receiver according to claim 3, it is characterised in that: the high pressure
Separate pipeline system includes the electrical ball valve set gradually on bypass main line, level-one branch piping, high-pressure multi-tube separation piping
It is converged with high pressure liquid level control pipe；It has been arranged in parallel release valve ball with electrical ball valve, has fastened setting two in high-pressure multi-tube separating pipe
High pressure vapor standpipe is connected into the gaseous phase outlet pipeline of high-pressure two-phase separator respectively, is respectively provided on two high pressure vapor standpipes
There is ball valve；Two high pressure liquid phase regulating valves are set below the remittance of high pressure liquid level control pipe.
5. a kind of slug flow trapping system based on low pressure receiver according to claim 4, it is characterised in that: medium pressure
Separate pipeline system includes the second level branch piping set gradually on middle pressure pipeline, middle pressure multitube separation piping and middle hydraulic fluid position
Control manifold is fastened in setting two in middle pressure multitube separating pipe and is calmed the anger phase standpipe, pass through respectively in calm the anger during phase general pipeline is connected into
Gas handling system is pressed, is provided with ball valve on phase of calming the anger in two standpipe；It is arranged two below the remittance of middle hydraulic fluid level control pipe
A middle hydraulic fluid phase regulating valve.
6. a kind of slug flow trapping system based on low pressure receiver according to claim 5, it is characterised in that: the low pressure
Collection system includes the three-level branch piping set gradually on low pressure pipeline, low pressure multitube separation piping, low pressure tube for entering can system
And atmospheric storage tank, two low-pressure vapor phase standpipes of setting are fastened in low pressure multitube separating pipe, are connected into respectively by low-pressure vapor phase general pipeline
Low-pressure gas processing system is respectively provided with ball valve on two low-pressure vapor phase standpipes.
7. a kind of slug flow trapping system based on low pressure receiver according to claim 6, it is characterised in that: in middle pressure pipe
The safety valve connecting with exhausting pipeline is provided on liquid pipe after road, low pressure pipeline and regulating valve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109138965A (en) * | 2018-10-11 | 2019-01-04 | 中国石油工程建设有限公司 | A kind of slug flow trapping system and method based on low pressure receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138965A (en) * | 2018-10-11 | 2019-01-04 | 中国石油工程建设有限公司 | A kind of slug flow trapping system and method based on low pressure receiver |
| CN109138965B (en) * | 2018-10-11 | 2023-11-03 | 中国石油工程建设有限公司 | Slug flow trapping system and method based on low-pressure liquid storage |
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