CN106908276A - A kind of oil pipeline on-line period method - Google Patents
A kind of oil pipeline on-line period method Download PDFInfo
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- CN106908276A CN106908276A CN201710103815.6A CN201710103815A CN106908276A CN 106908276 A CN106908276 A CN 106908276A CN 201710103815 A CN201710103815 A CN 201710103815A CN 106908276 A CN106908276 A CN 106908276A
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- 238000000034 method Methods 0.000 title claims abstract description 116
- 238000005070 sampling Methods 0.000 claims abstract description 157
- 239000000523 sample Substances 0.000 claims abstract description 108
- 239000007788 liquid Substances 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 14
- 230000008676 import Effects 0.000 claims abstract description 10
- 230000000717 retained effect Effects 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims description 12
- 238000010926 purge Methods 0.000 claims description 11
- 239000010865 sewage Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 238000004801 process automation Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 239000003921 oil Substances 0.000 description 19
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 238000012423 maintenance Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2847—Water in oils
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Abstract
The present invention relates to a kind of oil pipeline on-line period method, comprise the following steps：1) one section of bypass is provided with main pipeline, liquid enters bypass via sampling probe；2) pressure detecting；3) filtering and blowdown；4) filter two ends carry out pressure differential detection；5) the sampled pump pressurization of liquid；6) pressure detecting；7) sampling pump discharge accesses sample loop and spray circuits, and the spray circuits port of export is sprayed into main pipeline liquid through nozzle, and the liquid into sampling loop proceeds following scheme；8) blowdown；9) online Density Detection；10) it is vented；11) sample is taken, and sample is retained；12) remaining liquid finally imports main pipeline after pressure detecting, temperature detection, flow detection successively after taking sample.The present invention is capable of achieving that reliable, real-time continuous, sample size be accurate, flow control in loop is accurate, is finally reached and obtains the requirement that representative sample, sampling process automation, system control precision.
Description
Technical field
The present invention relates to a kind of oil pipeline on-line period method, belong to detection and the pipeline sampling system technology neck of quality
Domain.
Background technology
For oil pipeline on-line period technology, conventional process is manual manual sampling or on oil transportation main pipeline
Bypass is drawn, and sampling pump and sampling equipment are set in bypass, then the mode for leading back injection main pipeline will be bypassed.
The shortcoming of this kind of sampling method is：1st, it is not provided with mixing arrangement, it is impossible to ensure that liquid is sufficiently mixed in pipeline, obtains
Sample may be under-represented.2nd, be not provided with sampling control system, it is impossible to realize to sampling system equipment state, power conditions,
The monitoring of sampling loop flow velocity, sampling frequency.3rd, flow measurement is not carried out to sampling loop, to liquid stream in sampling loop whether just
Chang Wufa judges.4th, because pipeline medium cleannes are not high, the impurity that the inside is contained is frequently occluded sampling pump, causes sampling pump
Failure is damaged, cannot thus realize that on-line period is carried out continuously.5th, pump discharge pipeline easily produces backflow.6th, it is not provided with manually
Sampler, the system failure cannot be sampled.7th, back-up circuit is not provided with, system produces the normal oil transportation of fault impact.8th, it is not provided with
Sampling container protects facility, easily produces sample to overflow peril.9th, it is not provided with cleaning interface, is unfavorable for system maintenance, holds
Easy contaminated samples.10th, temperature, pressure instrumentation are not provided with, lack the monitoring to loop process parameter.11st, flow is not implemented
Control, it is impossible to realize that sampling loop flow follows main pipeline changes in flow rate.12nd, sampling rate and sample size and main pipeline is not implemented
Interior flow is proportional.
The content of the invention
To solve the above problems, operate oil pipeline on-line period it is an object of the invention to provide one kind and more they tend to mark
Standardization, facilitation, scientific, automation, improve on-line period systematic sampling representativeness, accuracy, continuity, reliability and
Security, facilitates the oil pipeline on-line period method of operation maintenance, monitoring management, installation and transportation.
The purpose of the present invention is achieved through the following technical solutions：
A kind of oil pipeline on-line period method, comprises the following steps：
1) one section of bypass is provided with main pipeline, the arrival end of the bypass connects sampling probe, and the sampling probe connects
Enter main pipeline, liquid enters bypass via sampling probe；
2) liquid into bypass carries out pressure detecting by pressure gauge；
3) liquid after pressure detecting is filtered and blowdown by filter；
4) filter two ends are parallel with pressure difference switch, and carry out pressure differential detection；
5) sampling pump, the sampled pump pressurization of liquid are connected to after filter；
6) sampling pump discharge is provided with pressure gauge, and pressure detecting is carried out again；
7) sampling pump discharge accesses sample loop and spray circuits, and liquid is sprayed into main pipeline by the spray circuits port of export through nozzle
Interior, the liquid into sampling loop proceeds following scheme；
8) blowdown；
9) online Density Detection；
10) it is vented；
11) sample is taken, and sample is retained；
12) remaining liquid successively be responsible for after pressure detecting, temperature detection, flow detection by last remittance after taking sample
Road；
Wherein, step 4) in pressure differential detection, step 5) in sampling pump pressurization, step 9) in online Density Detection,
Step 11) in sample retain relevant control, step 12) in pressure detecting, temperature detection, flow detection each signal is given
To controller, the controller receives the signal of higher level's control system.
Further, bypass import at be provided with manual sampling valve, when bypass failure cannot automatic sampling when, in step 1) after
Sampled manually.
Further, at bypass import and sampling loop exit is equipped with purge valve, and purge valve is with the use of fixed at two
Phase cleaning bypass and sampling loop.
Further, step 5) in the sampled pump of liquid be forced through parallel redundancy setting two sampling pumps realize.
Further, step 8) in blowdown by be arranged on sampling loop entrance sewage draining valve realize, while the row
Dirty valve is arranged on the minimum point of sampling loop.
Further, step 10) in exhaust realized by setting the emptying valve of sampling loop peak, and by hand
Dynamic control.
Further, step 11) be：The two sampling control valves set by redundancy receive the signal open and close of controller
Action, often acts the sample for once taking out fixed amount, and its frequency changes with the changes in flow rate of main pipeline, main pipeline flow signal
From higher level's master control system；Sampling control valve parallel connection is followed by a point liquid triple valve, and the order that point liquid triple valve receives controller will
Sample is divided into two sample reception tanks, and two sample reception tanks are all positioned on weighing instrument, and signal is uploaded and controlled by weighing instrument
Device, the quantity that weight according to sample reception tank is obtained come judgement sample whether the liquid level of correct and sample reception tank, control accordingly
The flow direction of system point liquid triple valve, completes to take sample, and sample is retained by above procedure.
Further, relief valve is provided with before described point of liquid triple valve, when sample reception tank superpressure, relief valve
Open.
Further, the sampling probe stretches into main pipeline center to the position of main pipeline central lower 0.1D, wherein, D
It is the diameter of main pipeline.
Further, the nozzle 31 is hollow straight tube, the bottom lock of the nozzle 31 and is combined with main pipeline bottom,
It is empty that the outer wall of the hollow straight tube is uniformly provided with several sprays.
Beneficial effects of the present invention are：
Can realize that oil pipeline on-line period is carried out continuously using on-line period method of the present invention, be represented with sampling
Property, quantity accuracy, operation stability, simple operation, beneficial to maintenance in the future and maintenance etc. many-side advantage, realize sampling
Also superior system remote detection and control are subjected to while system independent control.Pipe-line construction and operational management is set to more they tend to mark
It is standardization, modularization, high efficiency, hommization, shortcut.
It is reliable, easy for installation, real using that can be realized after on-line period method of the present invention for oil pipeline
Shi Lianxu, sample size are accurate, flow control in loop is accurate, are finally reached that acquirement sample is representative, sampling process is automatic
Change, system control precision requirement, it is ensured that sampling system it is continuous, stable, automatic, obtain representational sample in proportion
Product.On-line period method of the present invention includes dynamic mixed process, and the nozzle injection being fitted into using pump discharge in main pipeline is made
With the fluid in mixed charge road, it is ensured that liquid stream can be well mixed under any flow velocity in main pipeline so that enter and sample back
Liquid stream in road fully represents the property of liquid in main pipeline, it is to avoid sampling only represents local feature and do not possess representativeness.The party
Method is provided with control system and can realize to equipment in sampling loop (pump, sampling control valve, point liquid triple valve) and operational factor (pressure
Power, temperature, flow, sampling amount, density, liquid level of sample reception tank etc.) monitor in real time；And can at any time receive higher level's main control
The instruction of system；Sampling frequency is improved or reduced according to the flow velocity in main pipeline；Ensure steady sampling system, safety, controlled fortune
OK.The device sampling loop is provided with flowmeter, the flow velocity of liquid in real-time detection loop, and the flow velocity of liquid is controlled with loop
Parameter, controls the rotating speed of variable frequency pump to realize in sampling loop liquid in flow velocity real-time tracking main pipeline by sampling control system
Flow velocity.Sampling pump, sample reception tank, sampling control valve, the filter of redundancy are provided with the method, it is ensured that the continuous of system can
With.Even if can not be worked with ensuring system with the main pipeline junction manual sampling valve of setting in the method, can also carry out artificial
Sampling operation.
The device fills outdoor design (controller is mounted remotely from the non-anti-explosion area at scene) by sledge, and its degree of protection is
IP65, explosive-proof grade EXdIIBT4, fully meet open-air atmosphere and live requirement of explosion proof；Sample treatment and the sampling pump of conveying are adopted
Frequency conversion centrifugal pump is used, the control of the flow velocity and pressure to bypass and sampling loop, the requirement for making it meet standard is realized；In device
Porch sampling pump before be provided with redundant filter, it is ensured that the stability and reliability of the continuous operation of sampling pump；Taking
Sample pump discharge sets liquid level during check valve prevents bypass duct and backflow occurs；Butterworth Hatch is respectively provided with the import and export of device,
Cleaning uses external medium cleaning way, and structure arrangement is easy to process and is cleaned, and is capable of achieving not turning off maintenance in the case of main pipeline；
Equipped with related emptying, blowdown pipeline and valve in sampling loop, blowdown, shut-off can be carried out to the pipeline and equipment in device
And emission treatment, it is easy to daily maintenance and maintenance；Temperature transmitter, pressure transmitter, flowmeter are provided with sampling loop, it is real
When monitoring sampling loop temperature, pressure, flow, it is ensured that sampling carry out under reasonable conditions；It is provided with sample reception tank
Weighing-appliance, for when the liquid level superelevation alarm in device, while whether accurate monitor sample size in tank obtains；It is provided with safety
Bleeder valve, when superpressure reach safety valve release value when, safety valve action, to sample reception loop and connect sample reception tank implement
Safeguard protection；Pipeline and equipment in device are provided with constant temperature electrical heating and Insulation, it is ensured that the stream in on-line period device
Body is not protected from environmental, enables the device in outdoor stable operation.Differential pressure switch is set before and after filter is used for sample train
The running status of system detection filter, judges whether filter blocks.
The present invention is applied to oil pipeline on-line period.This automatic sampling method is used for domestic project, major technique first
Index exceedes domestic best level, has reached international same period advanced level.Inherently improve the acquirement of pumped (conveying) medium sample
Representativeness, reduces trade dispute；Do not influenceed by Oil Production technique and transport oil condition change；It is not affected by human factors；Reduce
The labour intensity of operating personnel.The technique of use, equipment, material and structure technology are advanced, design document component content and depth
Meet the requirements.Advanced with high content of technology, processing performance, technological process rationally, the pressure loss is not produced, different tube diameters are applicable
And any range of flow.On-line period method generates good environmental benefit, economic benefit and social benefit from after use,
The requirement built, produce and use is met well, and overall economic efficiency is significantly improved than the same type project being completed, and
Reliable, stabilization, efficient, safety.
Brief description of the drawings
The structural representation of the on-line period device that Fig. 1 is used by oil pipeline on-line period method of the present invention；
Wherein, 1- sampling probes, the manual sampling valves of 2-, 3- process valves A, 4,7,17,26,29,34,40,53,58,60-
Electric tracing thermal insulation part, 5- process valves B, 6- purge valve A, 8- bypass, 9- process valves C, 10- pressure gauge A, 11- filter
A, 12- differential pressure switch A, 13- sampling pump A, 14- pressure gauge B, 15- process valve D, 16- check valve A, 18- process valve E, 19-
Pressure gauge C20- filter Bs, 21- differential pressure switches B, 22- sampling pump B, 23- pressure gauge D, 24- process valve F25- check valve B,
27- purge valves B, 28- process valve G, 30- process valve H, 31- nozzle 32- sampling loops, 33- sewage draining valves, 35- technique valves
Door I, 36- on-line densimeters, 37- process valves J, 38- process valve K, 39- emptying valve, 41- process valves L, 42- sampling
Control valve A, 43- process valve M, 44- process valve N, 45- sampling control valve B, 46- process valve O, 47- point liquid triple valve,
48- relief valves, 49- sample reception tank A, 50- sample reception tank B, 51- weighing instrument A, 52- weighing instrument B, 54- process valves
P, 55- pressure transmitter, 56- temperature transmitters, 57- flowmeters, 59- process valves Q, 61- process valve R, 62,63,64,
65th, 66,67,68,69,70,71,72,73,76- instrument cables, 74- controllers, 75- master control systems, 77- spray circuits.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
The on-line period device that oil pipeline on-line period method of the present invention is used, as shown in figure 1, in main pipeline
On be provided with one section of bypass 8, the arrival end of the bypass 8 connects sampling probe 1, and the bypass 8 is provided with sampling pump, the sampling
Pump discharge connects sampling loop 32 and spray circuits 77, the outlet terminating nozzles 31 of the spray circuits 8, the He of the sampling probe 1
Nozzle 31 accesses main pipeline.
Wherein, sampling probe 1 is sequentially connected in series process valve A3 and process valve B5, sampling probe 1 and process valve A3 it
Between the other dynamic sampling valve 2 of catcher, the process valve B5 connects the entrance of branch road A and branch road B, the branch road A and branch road B setting phases
Together, be mutually redundant, wherein branch road A from entrance be sequentially connected in series process valve C9, pressure gauge A10, filter A11, sampling pump A13,
Pressure gauge B14, process valve D15 and check valve A16, branch road B are sequentially connected in series process valve E18, pressure gauge C19, mistake from entrance
Filter B20, sampling pump B22, pressure gauge D23, process valve F24 and check valve B25, filter A11 both sides parallel connection differential pressure switch
A12, the both sides of filter B 20 parallel connection differential pressure switch B21, the differential pressure switch A12, differential pressure switch B21 are accessed through instrument cable
Controller 74.It is other between process valve B5 and branch road A, branch road B inlet connections to meet purge valve A6.The outlet of branch road A and branch road B
A pipeline is merged into, and process valve G28 and process valve H30 is sequentially connected in series after joint, most afterwards through the nozzle 31
Access main pipeline.
The branch road A, it is other between the joint of branch road B and process valve G28 connect sampling loop 32, wherein, the sampling
Loop 32 is sequentially connected in series process valve I35, on-line densimeter 36 and process valve K38, the process valve K38 connections from entrance
The entrance of branch road C and branch road D.Wherein, it is other between the entrance of sampling loop 32 and process valve I35 to connect sewage draining valve 33.Technique
Pipeline F parallel connection technology the valves J37, the process valve J37 that valve I35, on-line densimeter 36 and process valve K38 are formed with
Emptying valve 39 is connect by the junction of pipeline F outlets.The branch road C is identical with the setting of branch road D, is mutually redundant, wherein branch road C
Process valve L41, sampling control valve A42 and process valve M43, branch road D are sequentially connected in series from entrance be sequentially connected in series technique from entrance
Valve N44, sampling control valve B45 and process valve O46；The outlet of the branch road C and branch road D merges into a pipeline, and
Pressure transmitter 55, temperature transmitter 56, flowmeter 57, purge valve B27, process valve Q59 and work are sequentially connected in series after joint
Skill valve R61, finally imports main pipeline.The both sides of branch road C and branch road D is parallel with one section of bypass line, on the bypass line
It is provided with process valve P16.
It is pipeline E that branch road C and branch road D are connected together after sampled control valve A42 and sampling control valve B45 respectively, described
The entrance connection point liquid triple valve 47 of pipeline E, connects sample reception tank A49 and sample connects respectively after described point of liquid triple valve 47
Closed cans B50, the sample reception tank A49 and sample reception tank B50 are respectively placed on weighing instrument A51 and weighing instrument B52.Sampling
Medium is extracted the equipment that juxtaposition is changed in sample receiver by control valve A42 and sampling control valve B45, full-bore design, complete
Taken in section, variable frequency control, high-frequency action (30 times/min), it is ensured that meet that frequency is proportional to flow, unit sample
Quantity obtains accurate.Sample reception tank A49 and sample reception tank B50 use full-closed structure, with fast connecting joint, safety
Bleeder valve, material are the pressure vessel of stainless steel.It is other between the entrance of the pipeline E and point liquid triple valve 47 to connect relief valve
48。
Sampling pump A13, on-line densimeter 36, weighing instrument A51, weighing instrument B52, sampling control valve A42, sampling control valve
B45, point liquid triple valve 47, pressure transmitter 55, temperature transmitter 56, flowmeter 57 by instrument cable access controller 74,
The controller 74 accesses master control system through instrument cable.Flowmeter 57 selects mass flowmenter, and the degree of accuracy is high, and inside can not
Dynamic component reduces maintenance workload, long lifespan, and can realize real-time dynamic pressure by the pressure transmitter 55 in sampling loop
Compensation.Controller 74 is on-line period device " brain ", with multiple function：Cryptoguard；Monitoring sampling loop temperature, pressure
The parameters such as power, flow, sample reception tank liquid level；Control sampling frequency, it is ensured that proportional to main pipeline flow；Control frequency conversion centrifugation
Revolution speed, reaches flow, the purpose of pressure in control sampling loop；Control the flow direction of liquid separatnig valve；Equipment and power supply status monitoring,
Fault alarm；Communicated with higher level's master control system, receive higher level's master control system order and open, stop sampler, received and monitor
The flow status of main pipeline；And sampler parameter is uploaded into higher level's master control system.
The sampling probe 1 stretches into main pipeline center to the interval position of main pipeline central lower 0.1D, wherein, based on D
The diameter of pipeline, can so avoid influence of the tube wall to flow velocity and moisture content, and the sample of extraction is most representative.
The nozzle 31 is the hollow high intensity straight tube of bottom lock, is uniformly provided with along the outer wall of the hollow straight tube some
Individual spray is empty, and the straight tube straight cutting main pipeline bottom makes whole pipeline beneficial to the effect by bottom deposit water etc. by pumping out liquid
Section reaches and is sufficiently mixed, it is ensured that it is in office why not profit flow velocity, viscosity, density under it is unaffected；The bottom of the nozzle 31
Combined closely with main pipeline bottom, to resist the moment of flexure caused by Peak Flow Rate in main pipeline, and bear to trigger because of vortex
Vibrations.
Between process valve A3 and process valve B5, process valve B5 and branch road A, branch road B inlet connections, check valve
Between A16 and branch road A, the outlet joint of branch road B, between branch road A, the outlet joint of branch road B and process valve G28, work
Between skill valve G28 and process valve H30, between the entrance and process valve I35 of sampling loop 32, process valve K38 with branch
Between road C, the inlet connection of branch road D, branch road C, branch road D outlet joint and pressure transmitter 55 between, purge valve B27 with
Between process valve Q59, electric tracing thermal insulation part is equipped between process valve Q59 and process valve R61.
Sampling pump B22 on the sampling pump A13 and branch road B uses frequency conversion centrifugal pump, by controller control frequency conversion from
The rotating speed of heart pump, reaches control sampling loop flow velocity and the strong and weak purpose of injection.
Before the filter A11 and the redundancy of filter B 20 are arranged on sampling pump, it is provided with the metal screen in filter
Magnetic absorption device, can well adsorb the metallic residue and particle in institute's pumped (conveying) medium, it is ensured that filter and sampling pump it is steady
Run and extend its service life calmly.
All pipelines of oil pipeline on-line period device of the present invention and all devices of installation are integrated in sledge dress
On, pressure rating meets the requirement of design pressure.
Process valve I35, process valve J37, process valve K38, process valve L41, process valve M43, process valve
N44, process valve O46, process valve P54 select 1 " 300#ANSI RF ball valves；
Process valve D15 and process valve F24 selects 3 " 300#ANSI RF ball valves；
Process valve C9, process valve E18, process valve G28 and process valve H30 select 4 " 300#ANSI RF ball valves；
Process valve A3 and process valve B5 selects 6 " 300#ANSI RF ball valves；
Check valve A16 and check valve B25 selects 3 " 300#ANSI RF swing type check valves；
Process valve R61 selects 1 " 300#ANSI RF stop valves；
Sampling pump A13 and sampling pump B22 selects frequency conversion centrifugal pump, and entrance is that 4 " 300#ANSI RF, it is 3 " 300# to export
ANSI RF, maximum stream flow 400GPM, 380/3/60HZ；
" 300#ANSI RF basket filters, swing type bolt is fast from 4 " × 8 " × 4 for filter A11 and filter B 20
Speed opens closure；
Flowmeter 57 selects " the 300#ANSI RF mass flowmenters of Rosement 1；
Sampling control valve A42 selects 1 with sampling control valve A45, and " the electro-hydraulic bypasses of 300#ANSI RF 210 sample control valve；
Relief valve 48 is from SS-4R3A types 1/4, and " pipe connects angle-style bleeder valve；
Sample reception tank A49 and sample reception tank A50 selects portable example receiving tank, maximum size：5GAL；
Liquid triple valve 47 is divided to be made up of following sections：Changing Direction Type valve ferrule fitting SS-43-GXF4-51-SR, threeway
Ball valve, spring return actuator and Changing Direction Type magnetic valve；
What on-line densimeter 36 was selected is " the 300#ANSI RF liquid densimeters of type 1 of Solartron 7845；
Pressure gauge A9, pressure gauge B15, pressure gauge C18, pressure gauge D24 selected ranges are that " internal thread connects for 0-50Bar, 1/2
The pressure display unit for connecing；
Differential pressure switch A12 and differential pressure switch B21 is from the differential pressure switch with display function；
Pressure transmitter 55 and temperature transmitter 56 are from the product of Rosement；
Control computer of the controller 74 from the models of OMNI 6000.After whole sampler sledge dress production and processing is finished
Anti-corrosion, the antirust treatment of correlation need be made, all of process pipelines and equipment do electric tracing and isothermal holding.
Oil pipeline on-line period method is carried out using on-line period device described above, is comprised the following steps：
1) one section of bypass is provided with main pipeline, the arrival end of the bypass connects sampling probe, and the sampling probe connects
Enter main pipeline, liquid enters bypass via sampling probe；
2) liquid into bypass carries out pressure detecting by pressure gauge；
3) liquid after pressure detecting is filtered and blowdown by filter；
4) filter two ends are parallel with pressure difference switch, and carry out pressure differential detection；
5) sampling pump, the sampled pump pressurization of liquid are connected to after filter；
6) sampling pump discharge is provided with pressure gauge, and pressure detecting is carried out again；
7) sampling pump discharge accesses sample loop and spray circuits, and liquid is sprayed into main pipeline by the spray circuits port of export through nozzle
Interior, the liquid into sampling loop proceeds following scheme：
8) blowdown；
9) online Density Detection；
10) it is vented；
11) sample is taken, and sample is retained；
12) remaining liquid successively be responsible for after pressure detecting, temperature detection, flow detection by last remittance after taking sample
Road；
Wherein, step 4) in pressure differential detection, step 5) in sampling pump pressurization, step 9) in online Density Detection,
Step 11) in sample retain relevant control, step 12) in pressure detecting, temperature detection, flow detection each signal is given
To controller, the controller receives the signal of higher level's control system.
Be provided with manual sampling valve at bypass import, when bypass failure cannot automatic sampling when, in step 1) after carry out it is artificial
Sampling.
Bypass at import and sampling loop exit is equipped with purge valve, purge valve is bypassed with the use of periodic cleaning at two
And sampling loop.
Step 5) in the sampled pump of liquid be forced through parallel redundancy setting two sampling pumps realize.
Step 8) in blowdown by be arranged on sampling loop entrance sewage draining valve realize, while the sewage draining valve set
In the minimum point of sampling loop.
Step 10) in exhaust realized by setting the emptying valve of sampling loop peak, and manually control.
Step 11) be：The signal open and close that the two sampling control valves set by redundancy receive controller are acted, and are often moved
Make the sample of once taking-up fixed amount, its frequency changes with the changes in flow rate of main pipeline, and main pipeline flow signal comes from higher level
Master control system；Sampling control valve parallel connection is followed by a point liquid triple valve, and be divided into for sample by the order that point liquid triple valve receives controller
In two sample reception tanks, two sample reception tanks are all positioned on weighing instrument, and signal is uploaded controller by weighing instrument, according to sample
Whether the weight of product receiving tank carrys out correct and sample reception tank the liquid level of quantity of judgement sample acquirement, and control accordingly divides a liquid threeway
The flow direction of valve, completes to take sample, and sample is retained by above procedure.
In the present embodiment, the on-line period method is sampled calibrating after flood-pot experiment process, as follows：
Water filling
A) connection valve, filter, pressure gauge, pipeline, pump, stream are passed through in the upstream of sampler before Autosampler operation
The equipment such as gauge, to the water that dose known amounts are injected in main pipeline.
B) water decanting point away from sampling system upstream element, while need to be by the mixing equipment of sampling system.
C) water injection rate generally accounts for the 1-5% of main pipeline rate-of flow at the appointed time, because this project system is doing
The injection rate of the big needs of output oil amount is just big during experiment, and cannot be separated after injection water, passed through on the premise of technical feasibility with customs,
Commodity inspection is consulted, and it is 0.6% or so of pipe throughput rate that injected water volume is adjusted to.
D) water injection time is no less than 1 hour, to gather the water filling sample of abundance.
E) water is injected from pipeline bottom with certain speed, and other mixing can not be produced to make in injection process to product
With.The velocity attitude of water filling is identical with the speed of medium in main pipeline and direction.
F) flowmeter accuracy of measurement water volume is better than ± 2%.
Calibrating
Sampling calibrating carried out under conditions of worst, respectively before testing, test in, test after collect 3 samples.
Operation sampler collects the sample of 1 hour before water filling, then regathers the sample of 1 hour in the injecting process, when all water fillings are situated between
Matter is by after sampler, then operates the sample that sampler receives 1 hour, it is determined that before testing with test after water in sample contain
Amount, no more than 0.1% between two moisture content values obtained by test.Eventually through water content in the sample that analytical sampling is obtained
The performance of whole sampling system is judged with the uniformity of injection water content, this is a percentage value, and the value exists
It is the highest level of the degree of accuracy generally acknowledged in the world within 0.05%.The automatic sampling system degree of accuracy of this project is checked through water filling
This rank is reached.
The automatic sampling system of this Project design is as follows through flood-pot experiment verification result：Water content is through analysis in crude oil
0.0504% (sampling analysis), one hour water injection rate percentage of water filling (water for being measured according to flowmeter and defeated that is 0.6267%
Oil mass is calculated), it is 0.6684% to obtain water content by sampling analysis in test process, final sampling analysis and reality
The deviation of water injection rate is -0.0087% (0.6684-0.6267-0.0504), and this meets the requirement of international standard highest level.This is
System is stable by the use more than 8 years, and since putting into operation, sampling 10L or so, operates more than 10000 times daily daily,
Often act primary sample 1mL.
This example improves credibility, accuracy, repeatability, the stability of on-line period system through on probation, beneficial in the future
Safeguard, many-sided advantage such as maintenance, and compact conformation, simple, convenient transportation is installed, it is possible to achieve outdoor sledge installing is put, and is saved
Floor space and operation operation room are saved.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of oil pipeline on-line period method, it is characterised in that comprise the following steps：
1) one section of bypass is provided with main pipeline, the arrival end of the bypass connects sampling probe, and the sampling probe accesses master
Pipeline, liquid enters bypass via sampling probe；
2) liquid into bypass carries out pressure detecting by pressure gauge；
3) liquid after pressure detecting is filtered and blowdown by filter；
4) filter two ends are parallel with pressure difference switch, and carry out pressure differential detection；
5) sampling pump, the sampled pump pressurization of liquid are connected to after filter；
6) sampling pump discharge is provided with pressure gauge, and pressure detecting is carried out again；
7) sampling pump discharge accesses sample loop and spray circuits, and the spray circuits port of export is sprayed into main pipeline liquid through nozzle,
Liquid into sampling loop proceeds following scheme；
8) blowdown；
9) online Density Detection；
10) it is vented；
11) sample is taken, and sample is retained；
12) remaining liquid finally imports main pipeline after pressure detecting, temperature detection, flow detection successively after taking sample；
Wherein, step 4) in pressure differential detection, step 5) in sampling pump pressurization, step 9) in online Density Detection, step
11) sample in retains relevant control, step 12) in pressure detecting, temperature detection, flow detection signal is each delivered into control
Device processed, the controller receives the signal of higher level's control system.
2. oil pipeline on-line period method according to claim 1, it is characterised in that be provided with bypass import and taken manually
Sample valve, when bypass failure cannot automatic sampling when, in step 1) after sampled manually.
3. oil pipeline on-line period method according to claim 1, it is characterised in that at bypass import and sampling loop
Exit is equipped with purge valve, and purge valve is bypassed and sampling loop with the use of periodic cleaning at two.
4. oil pipeline on-line period method according to claim 1, it is characterised in that step 5) in the sampled pump of liquid
Two sampling pumps for being forced through parallel redundancy setting are realized.
5. oil pipeline on-line period method according to claim 1, it is characterised in that step 8) in blowdown by setting
Realized in the sewage draining valve of sampling loop entrance, while the sewage draining valve is arranged on the minimum point of sampling loop.
6. oil pipeline on-line period method according to claim 1, it is characterised in that step 10) in exhaust pass through
The emptying valve for setting sampling loop peak is realized, and is manually controlled.
7. oil pipeline on-line period method according to claim 1, it is characterised in that step 11) be：Set by redundancy
The two sampling control valves put receive the signal open and close action of controller, often act the sample for once taking out fixed amount, its frequency
Change with the changes in flow rate of main pipeline, main pipeline flow signal comes from higher level's master control system；Sampling control valve parallel connection is followed by
Divide liquid triple valve, be divided into sample in two sample reception tanks by the order for being divided to liquid triple valve to receive controller, two sample receptions
Tank is all positioned on weighing instrument, and signal is uploaded controller by weighing instrument, and the weight according to sample reception tank is obtained come judgement sample
Whether correct and sample reception tank the liquid level of quantity, the flow direction of control point liquid triple valve, is taken by above procedure completion accordingly
Sample, and sample is retained.
8. oil pipeline on-line period method according to claim 7, it is characterised in that be provided with before described point of liquid triple valve
Relief valve, when sample reception tank superpressure, relief valve is opened.
9. oil pipeline on-line period method according to claim 1, it is characterised in that the sampling probe stretches into supervisor
Road center to the position of main pipeline central lower 0.1D, wherein, D for main pipeline diameter.
10. oil pipeline on-line period method according to claim 1, it is characterised in that the nozzle is hollow straight tube,
The bottom lock of the nozzle and combined with main pipeline bottom, it is empty that the outer wall of the hollow straight tube is uniformly provided with several sprays.
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| CN107589101A (en) * | 2017-09-28 | 2018-01-16 | 中国石油天然气集团公司 | Online oil-polluted water detection means based on ultraviolet fluorescence method |
| CN109813629A (en) * | 2017-11-21 | 2019-05-28 | 中蓝连海设计研究院 | A kind of on-line period densitometer and its density measuring method |
| CN110082163A (en) * | 2019-05-31 | 2019-08-02 | 北京壮大瑞业科技发展有限公司 | Oil tank sampling equipment |
| CN110726593A (en) * | 2019-10-29 | 2020-01-24 | 河南乾元过滤设备有限公司 | Melt online independent sampling measuring meter |
| CN111709119A (en) * | 2020-05-19 | 2020-09-25 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Pressure pulsation analysis method, pressure pulsation analysis device, computer equipment and storage medium |
| CN112984383A (en) * | 2019-12-16 | 2021-06-18 | 中国石油天然气股份有限公司 | Oil transportation method and system for finished oil pipeline |
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