CN106287231A - The Crude Oil Transportation method of one kind PWM mechanism - Google Patents
The Crude Oil Transportation method of one kind PWM mechanism Download PDFInfo
- Publication number
- CN106287231A CN106287231A CN201610793994.6A CN201610793994A CN106287231A CN 106287231 A CN106287231 A CN 106287231A CN 201610793994 A CN201610793994 A CN 201610793994A CN 106287231 A CN106287231 A CN 106287231A
- Authority
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- China
- Prior art keywords
- oil
- crude oil
- conveying
- vessel
- back pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000010779 crude oil Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 111
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000009825 accumulation Methods 0.000 claims description 26
- 239000013589 supplement Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims 1
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses the Crude Oil Transportation method of a kind PWM mechanism, when carrying out Crude Oil Transportation by pipeline, include following operation: crude oil flows out from a upper oil vessel, through positive pressurization device pressurization next oil vessel backward conveying, this is that forward carries；Crude oil flows out from next oil vessel, and through the backward upper oil vessel conveying of reverse prelum pressurization, this is reversely conveying；Forward conveying is carried out from when reversely carrying different, by regulating forward conveying and the flow velocity reversely carried, flow so that the conveying downwards of crude oil pulse formula.The present invention uses the mode of similar pulse width modulation to keep the flow velocity that pipeline Crude Oil is higher so that crude oil is not easy to freeze.
Description
Technical field
The invention belongs to Crude Oil Transportation technical field, relate to the Crude Oil Transportation method of a kind PWM mechanism.
Background technology
Pipeline oil transportation is to be pressurizeed by crude oil (or oil product), heat and be delivered to by a ground (usually oil field) by oil pipeline
Another ground (usually refinery, harbour etc.).The purpose of pressurization is to provide kinetic energy for crude oil, to overcome geographical potential difference along the line and pipeline
The pressure loss along the line；The measure that heating is the " three high " crude oil for " content of wax is high, condensation point high, viscosity big " and takes, purpose
It is to make the temperature of pipeline Crude Oil remain at more than condensation point or higher temperature so that crude oil smooth flow.
Carry former oil viscosity and freezing point ratio is relatively low, in the way of directly conveying is not heated in employing, but can have relatively
High-solidification point and the crude oil of viscosity, it is necessary to through heating or through modified conveying.Mostly the oil pipeline of north america is
Carry low condensation point, low viscosity crude oil, so mostly being not heated transportation.And all use heating defeated in the crude oil that condensation point and viscosity are higher
Send.Along with the research of rheological characteristic of crude oil, after crude oil adds chemical pour-point depression agent, room temperature conveying technology is also applied to some crude oil pipelines
In operational management.
Crude oil many genus high-content wax that China produces, high-solidification point, high viscosity oil, for higher former of freezing point, viscosity
Oil, there is the pipeline road of microthermal climate in environment the most to external world, in order to ensure its mobility and prevent pipeline blockage, generally
Need to use heated transportation technique.
Heated transportation refers to enter pipeline pressurized delivered after heating crude oil, reduces it by raising Crude Oil Transportation temperature and glues
Degree, reduces pipeline friction loss.Energy loss of both the existence of crude oil pipeline heated transportation, radiation loss and frictional resistance damage
Lose.Deep fat is stood downwards in course of conveying, owing to its temperature is higher than the ambient temperature around pipeline, there is radial temperature difference, and deep fat is taken
The heat energy of band will constantly scatter and disappear toward pipe is outer, thus make oil stream temperature be gradually lowered during being fed forward, and cause and axially dissipate
Heat loss, oil stream temperature declines, and viscosity rises, and the pressure drop of unit length pipeline is gradually increased.It is important to note that oil stream temperature
During close to freezing point, the pressure drop of unit length pipeline can steeply rise, and pipeline accident easily occurs.Crude oil in China has viscous mostly
The character that degree is big, freezing point is high, heated transportation technique is a kind of conveying technique that domestic crude oil pipeline is conventional.But heated transportation
Having its weakness, one is that Low flow rate is restricted by thermal condition, for the pipeline of heated transportation, owing to dispelling the heat along journey, in order to protect
Hold the temperature of oil product, heating station to be set；Two is the stopping transportation that once has an accident, it is necessary to rushes to repair immediately, resumes operation in time,
Otherwise, the stopping transportation of long period can lead to solidifying event of running affairs.
Summary of the invention
The present invention proposes the Crude Oil Transportation method of a kind PWM mechanism, uses the mode of similar pulse width modulation to protect
Hold the flow velocity that pipeline Crude Oil is higher so that crude oil is not easy to freeze.
The present invention is to be achieved through the following technical solutions:
The Crude Oil Transportation method of this kind PWM mechanism particularly as follows:
When carrying out Crude Oil Transportation by pipeline, include following operation:
Crude oil flows out from a upper oil vessel, and through positive pressurization device pressurization next oil vessel backward conveying, this is just
To conveying；
Crude oil flows out from next oil vessel, and through the backward upper oil vessel conveying of reverse prelum pressurization, this is anti-
To conveying；
Forward conveying is carried out from when reversely carrying different, by regulating forward conveying and the flow velocity reversely carried, flow, makes
Obtain the downward conveying of crude oil pulse formula.
Further, a upper oil vessel oil mass can crude oil keep enough flow velocitys can smooth conveying time, reversely carry
Amount is zero, keeps forward conveying；When crude oil reserve declines, stop after forward conveying capacity a period of time, reversely conveying start to
A upper oil vessel supplements oil mass so that a upper oil vessel oil mass is recovered, and the most reversely carries stopping, and forward conveying is opened again
Begin.
Further, accumulation of energy oil conservator, the downstream of accumulation of energy oil conservator it are provided with between a upper oil vessel and next oil vessel
Pipeline is provided with back pressure one-way cock；
A upper oil vessel carries crude oil by positive pressurization device to forward, passes through condition meet back pressure one-way cock
Time downstream transport；Can not meet back pressure one-way cock by condition time, crude oil is stored in accumulation of energy oil conservator；Wait to store up
Exist accumulation of energy oil conservator crude oil reserve arrive a certain amount of time, forward conveying stop, an accumulation of energy oil conservator upwards oil vessel is anti-
To conveying, until a upper oil vessel supplement oil mass add to a certain amount of time, continue the conveying of downward forward.
Further, carrying with the forward of a upper oil vessel and accumulation of energy oil conservator, reversely carry alternately, forward carries
Pressure be gradually increased, to being transported to next website by demand to meet back pressure one-way cock.
Further, after crude oil is by back pressure one-way cock during downstream transport, extends along with pipeline and slow down, slowing down
Set up interim oil vessel during to certain speed, and set up accumulation of energy oil conservator and back pressure check valve in the downstream of interim oil vessel
Door；Being carried by the forward of interim oil vessel with accumulation of energy oil conservator, reversely carried alternately, the flow velocity improving crude oil makes former
Oil can pass through back pressure one-way cock.
Further, crude oil keeps the maximum of speed to raise in the duct to be allowed the pressure passed through to ensure with back pressure one-way cock
Journey, in pipeline when the distance suitable with H-Max, sets up interim oil vessel, accumulation of energy oil conservator and back pressure list respectively
To valve.
Further, by forward conveying and the regulation of reversely conveying so that crude oil keeps higher flow velocity in pipeline；Institute
The high flow rate stated slow down crude oil blocking, enhances the ability carrying foreign material.
Compared with prior art, the present invention has a following useful technique effect:
The Crude Oil Transportation method of the class PWM mechanism that the present invention provides,
Former oil viscosity is utilized to realize omnidistance without gradient-heated (oil transportation flow velocity ensures constant)
Due to the existence of wax in crude oil, (under equal traffic conditions, flow velocity is accelerated, crude oil to cause caliber change in course of conveying
Between shearing force increase make to take away the ability of foreign material and improve so that pipeline is cleaner)
Owing to pipeline external environment changes, during freezing, local velocity increases, and the pressure before and after frozen block gateway becomes
It is more that change makes this portion obtain energy, and temperature improves, and makes this part be not easy to freeze.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, described in be explanation of the invention and
It not to limit.
The present invention class PWM mechanism Crude Oil Transportation method particularly as follows:
When carrying out Crude Oil Transportation by pipeline, include following operation:
Crude oil flows out from a upper oil vessel, and through positive pressurization device pressurization next oil vessel backward conveying, this is just
To conveying；
Crude oil flows out from next oil vessel, and through the backward upper oil vessel conveying of reverse prelum pressurization, this is anti-
To conveying；
Forward conveying is carried out from when reversely carrying different, by regulating forward conveying and the flow velocity reversely carried, flow, makes
Obtain the downward conveying of crude oil pulse formula.
Further, a upper oil vessel oil mass can crude oil keep enough flow velocitys can smooth conveying time, reversely carry
Amount is zero, keeps forward conveying；When crude oil reserve declines, stop after forward conveying capacity a period of time, reversely conveying start to
A upper oil vessel supplements oil mass so that a upper oil vessel oil mass is recovered, and the most reversely carries stopping, and forward conveying is opened again
Begin.
Further, accumulation of energy oil conservator, the downstream of accumulation of energy oil conservator it are provided with between a upper oil vessel and next oil vessel
Pipeline is provided with back pressure one-way cock；
A upper oil vessel carries crude oil by positive pressurization device to forward, passes through condition meet back pressure one-way cock
Time downstream transport；Can not meet back pressure one-way cock by condition time, crude oil is stored in accumulation of energy oil conservator；Wait to store up
Exist accumulation of energy oil conservator crude oil reserve arrive a certain amount of time, forward conveying stop, an accumulation of energy oil conservator upwards oil vessel is anti-
To conveying, until a upper oil vessel supplement oil mass add to a certain amount of time, continue the conveying of downward forward.
Further, carrying with the forward of a upper oil vessel and accumulation of energy oil conservator, reversely carry alternately, forward carries
Pressure be gradually increased, to being transported to next website by demand to meet back pressure one-way cock.
Further, after crude oil is by back pressure one-way cock during downstream transport, extends along with pipeline and slow down, slowing down
Set up interim oil vessel during to certain speed, and set up accumulation of energy oil conservator and back pressure check valve in the downstream of interim oil vessel
Door；Being carried by the forward of interim oil vessel with accumulation of energy oil conservator, reversely carried alternately, the flow velocity improving crude oil makes former
Oil can pass through back pressure one-way cock.
Further, crude oil keeps the maximum of speed to raise in the duct to be allowed the pressure passed through to ensure with back pressure one-way cock
Journey, in pipeline when the distance suitable with H-Max, sets up interim oil vessel, accumulation of energy oil conservator and back pressure list respectively
To valve.
Further, by forward conveying and the regulation of reversely conveying so that crude oil keeps higher flow velocity in pipeline；Institute
The high flow rate stated slow down crude oil blocking, enhances the ability carrying foreign material.
Claims (8)
1. the Crude Oil Transportation method of a kind PWM mechanism, it is characterised in that when carrying out Crude Oil Transportation by pipeline, include
Following operation:
Crude oil flows out from a upper oil vessel, and through positive pressurization device pressurization next oil vessel backward conveying, this is that forward is defeated
Send；
Crude oil flows out from next oil vessel, and through the backward upper oil vessel conveying of reverse prelum pressurization, this is the most defeated
Send；
Forward conveying is carried out from when reversely carrying different, by regulating forward conveying and the flow velocity reversely carried, flow so that former
The downward conveying of oil pulsed.
2. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 1, it is characterised in that in a upper oil vessel oil mass
Can crude oil keep enough flow velocitys can smooth conveying time, reverse conveying capacity is zero, keeps forward conveying；Decline at crude oil reserve
Time, stop after forward conveying capacity a period of time, reversely a conveying beginning upwards oil vessel supplements oil mass so that a upper oil storage is held
Device oil mass is recovered, and the most reversely carries stopping, and forward conveying starts again at.
3. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 1, it is characterised in that a upper oil vessel and next
Being provided with accumulation of energy oil conservator between oil vessel, the downstream pipe of accumulation of energy oil conservator is provided with back pressure one-way cock；
A upper oil vessel carries crude oil by positive pressurization device to forward, meet back pressure one-way cock by condition time to
Downstream carries；Can not meet back pressure one-way cock by condition time, crude oil is stored in accumulation of energy oil conservator；To be stored in
When the crude oil reserve of accumulation of energy oil conservator arrives a certain amount of, forward conveying stops, and an accumulation of energy oil conservator upwards oil vessel is the most defeated
Send, until a upper oil vessel supplement oil mass add to a certain amount of time, continue downward forward conveying.
4. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 3, it is characterised in that with a upper oil vessel and storage
Alternately, the pressure of forward conveying is gradually increased, extremely to meeting back pressure check valve for the forward conveying of energy oil conservator, reversely conveying
Door be transported to next website by demand.
5. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 3, it is characterised in that unidirectional by back pressure at crude oil
After valve during downstream transport, extend along with pipeline and slow down, set up interim oil vessel when decelerating to certain speed, and
Accumulation of energy oil conservator and back pressure one-way cock are set up in the downstream of interim oil vessel；By interim oil vessel and accumulation of energy oil conservator
Alternately, the flow velocity improving crude oil enables crude oil by back pressure one-way cock for forward conveying, reversely conveying.
6. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 5, it is characterised in that permitted with back pressure one-way cock
Permitted the pressure that passes through and ensured that crude oil keeps the H-Max of speed in the duct, in pipeline every suitable with H-Max away from
From time, set up interim oil vessel, accumulation of energy oil conservator and back pressure one-way cock respectively.
7. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 1, it is characterised in that by forward conveying with reverse
The regulation of conveying so that crude oil keeps higher flow velocity in pipeline.
8. the Crude Oil Transportation method of class PWM mechanism as claimed in claim 7, it is characterised in that described high flow rate slow down
Crude oil blocks, enhances the ability carrying foreign material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610793994.6A CN106287231A (en) | 2016-08-31 | 2016-08-31 | The Crude Oil Transportation method of one kind PWM mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610793994.6A CN106287231A (en) | 2016-08-31 | 2016-08-31 | The Crude Oil Transportation method of one kind PWM mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106287231A true CN106287231A (en) | 2017-01-04 |
Family
ID=57672438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610793994.6A Pending CN106287231A (en) | 2016-08-31 | 2016-08-31 | The Crude Oil Transportation method of one kind PWM mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106287231A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3705626A (en) * | 1970-11-19 | 1972-12-12 | Mobil Oil Corp | Oil well flow control method |
| US4271007A (en) * | 1979-11-20 | 1981-06-02 | Gulf Canada Limited | Method and apparatus for the prevention of solids deposits in a tubular reactor by pulsed flow |
| SU1164509A1 (en) * | 1982-12-31 | 1985-06-30 | Всесоюзный Научно-Исследовательский И Проектный Институт Нефтеперерабатывающей И Нефтехимической Промышленности | Method of strating main oil products pipeline |
| JPH11315999A (en) * | 1998-05-07 | 1999-11-16 | Japan Organo Co Ltd | Transfer system for sedimenting slurry |
| CN201779449U (en) * | 2010-07-28 | 2011-03-30 | 中国石油天然气股份有限公司 | Frequency conversion oil transportation device |
| RU2523923C1 (en) * | 2012-12-05 | 2014-07-27 | Открытое акционерное общество Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Oil transportation in pipeline by reverse transfer |
-
2016
- 2016-08-31 CN CN201610793994.6A patent/CN106287231A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3705626A (en) * | 1970-11-19 | 1972-12-12 | Mobil Oil Corp | Oil well flow control method |
| US4271007A (en) * | 1979-11-20 | 1981-06-02 | Gulf Canada Limited | Method and apparatus for the prevention of solids deposits in a tubular reactor by pulsed flow |
| SU1164509A1 (en) * | 1982-12-31 | 1985-06-30 | Всесоюзный Научно-Исследовательский И Проектный Институт Нефтеперерабатывающей И Нефтехимической Промышленности | Method of strating main oil products pipeline |
| JPH11315999A (en) * | 1998-05-07 | 1999-11-16 | Japan Organo Co Ltd | Transfer system for sedimenting slurry |
| CN201779449U (en) * | 2010-07-28 | 2011-03-30 | 中国石油天然气股份有限公司 | Frequency conversion oil transportation device |
| RU2523923C1 (en) * | 2012-12-05 | 2014-07-27 | Открытое акционерное общество Акционерная компания по транспорту нефти "Транснефть" (ОАО "АК "Транснефть") | Oil transportation in pipeline by reverse transfer |
Non-Patent Citations (1)
| Title |
|---|
| 李立, 丁芝来, 姜征峰, 徐海红, 宋建河, 李东风, 肖铭, 马宏伟: "任京输油管道加降凝剂正反输现场试验", 油气储运, no. 01, pages 232 * |
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| PB01 | Publication | ||
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Application publication date: 20170104 |