CN108223929A - A kind of bilayer oil transportation（On the ground）Pipeline - Google Patents
A kind of bilayer oil transportation（On the ground）Pipeline Download PDFInfo
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- CN108223929A CN108223929A CN201711499594.5A CN201711499594A CN108223929A CN 108223929 A CN108223929 A CN 108223929A CN 201711499594 A CN201711499594 A CN 201711499594A CN 108223929 A CN108223929 A CN 108223929A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pipeline Systems (AREA)
Abstract
The present invention is named as a kind of double-deck oil transportation (ground) pipeline, and the invention belongs to oil pipeline manufacture technology field, current existing oil pipeline has very big security risk etc., and the present invention can solve problems with completely.Double-deck purpose of double-deck oil transportation (ground) pipeline of the present invention is exactly to add one layer of protection; preventing pipe leakage accident; oil leakage oil aspect is stolen in artificial destruction; in terms of pipeline weathering soil oxidative attack protection, all improve a lot in terms of pipeline service life and pipe-line maintenance period etc..For this purpose, a kind of it is proposed that fabrication design production technology of bilayer oil transportation (ground) pipeline.Present invention is mainly used for ground closely or remote oil transportation is used.
Description
Technical field
The present invention relates to adding for the fabrication design production technology of oil pipeline, especially a kind of double-deck oil transportation (ground) pipeline
Work designs production technology.
Background technology
Material and specification
Tubing and applicability
Tubing used in oil pipeline is mainly carbon steel tubing, can be divided into seamless steel pipe and welding again according to its manufacturing process
Steel pipe.Seamless steel pipe has the features such as intensity is high, and specification is more, therefore suitable under the stronger oil product of corrosivity or hot conditions
Conveying.Seamless steel pipe is divided into as two kinds of hot rolling and cold-drawn.Since cold-drawn processing can cause material hardening, foundation is also needed to
The particular use of tubing does corresponding heat treatment.Welded still pipe can be divided into two kinds of opposite joint steel pipe and unsuccessful welded pipe.Due to carbon
The operational characteristic of steel pipe results in such steel pipe and easily becomes fragile in low temperature, therefore is primarily adapted for use in room temperature pipeline, tubing
Temperature in use is also no more than 300 degrees Celsius, it is however generally that normal carbon steel pipe temperature in use is between 0 to 300 degree Celsius.
According to Fine Steel Casting iron pipe, then temperature application range and relax up to -40 to 450 degrees Celsius.The experimental pressure of steel pipe is generally
1.5 times of nominal pressure.When the temperature of conveyed material is no more than 200 degrees Celsius, operating pressure is exactly nominal pressure.When
It is that operating pressure should accordingly be less than nominal pressure that temperature, which is more than 200 degree,.
Specification type
The overall diameter of steel pipe is generally represented with capital D, adds the numerical value of outer diameter behind, such as：Overall diameter is 400mm
Steel pipe represented with D400；The interior diameter of steel pipe represents with lower-case letters d, thereafter additional inner diameter numerical value, as interior diameter is 300
Steel pipe is expressed as d300；The specification of steel pipe generally represents that, if outer diameter is 400mm, wall thickness is the pipe of 6mm with " Φ outer diameters × wall thickness "
Road is expressed as Φ 400 × 6.Common steel pipe specification is as shown in the table：
Important parameter
Nominal diameter：Nominal diameter is for convenience of a normal diameter as defined in the design, construction and inspection and repair shop of pipeline.One
As for, the actual inner diameter or outer diameter of nominal diameter and pipeline are all unequal, but an integer value being closer to internal diameter.It is public
Diameter is claimed to be characterized with symbol " DN ", adds specific numerical value thereafter, such as：Nominal diameter is that the oil pipeline of 600mm is expressed as
“DN600”.Nominal diameter also usually uses " very little " as unit, 1 cun=25.4mm, for convenience of generally taking " 1 cun in conversion operation
The oil pipeline of ≈ 25mm ", DN600 can be known as " 24 cun ".
PressureParameter：The pressure parameter of pipeline has " nominal pressure ", " test pressure " and " operating pressure " three, nominal pressure
Power is the nominal pressure parameter that facilitates engineering such as nominal diameter, is expressed as PN, if nominal pressure is 1.6MegapascalPipeline, note：
KPa (KPa) and pa (Pa) conduct also can be used in " PN1.6MPa ", nominal pressureDimension, conversion relation is as follows：1MPa=1000KPa
=1000000Pa；Test pressure is that the intensity and compressive property of pipeline are carried out testing used pressure, and Ps is marked forever, is
Ensure the safe to use of pipeline, test pressure requirement is higher than nominal pressure；Operating pressure refers to pipeline institute in practical applications
The pressure born.
Pipeline connects and control
Connection and flange
Oil pipeline must use certain on-link mode (OLM) that could form a complete system.The connection mode of pipeline is main
There are screw thread, welding and flanged joint three classes.Pressure is not high, and the method connection of screw thread may be used in the little pipeline of caliber, such
Connection method is more convenient, but since most trunk petroleum pipeline calibers are generally all larger, mostly using other two kinds connections
Method.The pipeline of DN >=50 uses the method connection of welding substantially, and welding has easy for construction, firm, tight and saving steel
The advantages that, the position that dismounting is not needed on general straight tube or detour all can be used.Pipeline and valve or other equipment are (such as：Pump) junction and pipeline needs dismantle place all useFlangeConnection, to ensure the tightness of flange connections, also in method
Blue both sides are required for that the opposite soft flange gasket of matter is used to be assisted.Flange can be divided mainly into downhand welding, spiral shell according to manufacture craft
The several types such as line, butt welding, pine set and blind plate, contribute between pipeline interconnect other than blank flange, if desired
The pipeline of different-diameter is connected, the corresponding adapter flange of both ends diameter can also be used.Blank flange comes directly towards one end for pipeline
Closing, therefore design can bear larger bendingStress。[4]
Valve and control
Valve be for open, close or control pipeline in media flow mechanical device.The type of valve is various, point
Class method also there are many.If by purposes divide, can be divided into block valve,Check-valves, distributing valve etc.；If pressing force differentiation can be divided into true
(operating pressure is less than empty valveStandard atmospheric pressure), low pressure valve (PN≤1.6MPa), middle pressure valve (PN=2.5-6.4MPa) and high pressure
Valve (PN=10-80MPa).If hand-operated valve, power drive valve and automatic valve can be divided by type of drive, also by temperature or
The different sorting technique of material etc..Gate valve is valve base and valve plate equality, valve plate by handwheel with valve rod vertical up-or-down movement,
Cut off or open pipeline with this, while adjustable pipeline opens ratio.Due to the characteristic of flashboard, when being normally applied,Gate valveIt is more
It is less for flow-rate adjustment for standard-sized sheet or fully closed adjusting, but gate valve has the advantages that good seal performance and easy to maintenance.Shut-off valve
Spool vertically fall on pedestal, valve seat and pipeline centerline parallel, fluid flow in valve body in serpentine state, fluidResistance
Larger, shut-off valve is generally used for flow-rate adjustment, and with manufacture and it is easy to maintenance a little, but while closing, easily leaks, and seals
Property be not so good as gate valve.
In the laying of long-distance transmission pipeline, valve must be installed along the line, and 32km is not to be exceeded in spacing, if pipeline by way of
Meagrely-populated area then can suitably relax.It is being worn along Buried Oil Pipelines across Large River, lake, reservoir and cities and towns etc.
The pipe ends of densely inhabited district think needs according to orographic condition, must set valve.It the installation position of block valve should
Not byGeological disasterAnd flood influence, and to meet traffic convenience, the convenient needs of maintenance, and protection facility should be set.
PROCESS SUMMARY
Single product conveying
The oil pipeline of long range is made of oil transportation station and pipeline two parts, and length is up to several hundred kilometers even longer, edge
Line is equipped with initial station, several intermediate stations and terminal.Same oil product in-line flows consumed energy and is provided by oil transportation station,
Therefore it should be understood that the operational characteristic of pipeline is with determining specific equipment situation under different situations.Conveying light-end products (such as gasoline,Aviation kerosineWithDiesel oilDeng) pipeline, due to mediumViscositySmall, good fluidity, therefore do not need to heat along the line, medium and pipeline
Temperature it is equal with surrounding soil temperature, such oil pipeline is referred to as " Isothermal Oil Pipeline ", such technique without considerHeat MechanicsFactor, it is thus only necessary to the power provided from pressure balanced pumping plant needed for hydromechanical angle estimator and pipeline.When
The medium conveyed for easily solidification, high viscosity (such as：The higher China's Mainland of wax content itDaqing oil fieldOil-producing) when, if itsIt is solidifying PointWhen very high higher than viscosity under the environment temperature or environment temperature of pipeline, can not directly it be conveyed using isothermal method, because
Excessively high viscosity can cause the pressure drop of pipeline to greatly increase, and can not only expend a large amount of power and have security risk, therefore must use
The method of heated transportation with achieve the effect that reduce viscosity, less frictional resistance.Heating system keeps pipeline with the outer wall in pipeline
Temperature reach the needs of conveying.In order to enable the energy of heating pipe less can lose, the pipeline of general heated transportation is all
Need to wrap up heat-preserving equipment, heat-preserving equipment package pipeline and heating system are also referred to as insulating layer, the substance of insulating layer should have compared with
DifferenceThermal conductivity, and must have high temperature resistant, resistCorrosion, the features such as vibration resistance and water imbibition are weak, chemical stability is good, it is generally soft
SoftIt is nonmetallicMixing material is (such as：Blanket of glass wool etc.).Protective device has been also needed to protect outside insulating layer, the most commonly used is
Galvanized iron sheet.
Sequentially-fed
Main entry：Sequentially-fed
Sequentially-fed is in a pipeline, according to certain batch and sequence, is continuously conveyed different types ofOil product's
Carrying method, also known as " Alternating Transportation " or " contaminated product conveying ".Sequentially-fed can maximally utilise the capacity of pipeline,
With this cost-effective increase benefit, and lower the transport pressure of the oily mode of other fortune such as railway, thus in the U.S. and Russia etc.
Country is widely used.The oil pipeline that China also has section of tubing especially military uses sequentially-fed technique.Sequentially-fed
Main critical technological point is the processing of generated contaminated product when variety classes oil product conveys successively and how to reduce to the greatest extent mixed
The generation of oil, reducing contaminated product and may be used makes oil product be kept in transmission processTurbulent flowFluidised form and using mechanical device orGelEvery
From method realize, wherein the use of gel isolation being current more potential effective ways.
Corrosive pipeline and anti-corrosion
Main entry：Corrosive pipeline
Due to containing element sulphur and acidic materials in the oil product of conveying, additional pipeline it is exposed outdoor by wind and weather,
Pipeline is caused easily to be corroded.Corrosive pipeline is mainly the following：ByPrimary batterySteel caused by principleOxygen uptake is corroded；Due to
Acid rain cause the great acidity of pipe surface sulfide (sulfur dioxide andHydrogen sulfide) caused byGas-evolving electrodes；Atmospheric precipitation is led
The carbon dioxide sour corrosion of cause；Pipe surface can be metabolizedSulfateBacterium caused by bacterial corrosion and pipeline internal water accumulation lead
Corrosion of cause etc., wherein oxygen uptake corrosion are most corrosion conditions, and principle is as follows：
Under neutrallty condition：O2+2H+4e→2OH
Under alkaline condition：O2+2H2O+4e→4OH
Under acid condition：O2+4H+4e→2H2O
Since the origin cause of formation of corrosive pipeline is not quite similar with condition, pipeline corrosion protection according to different corrosion conditions also have with
Under several different methods：Reasonable material selects different types of material according to different pumped (conveying) mediums and environmental condition；Cathode
Protection, is exactly external dc power supply, is to be originally used forAnodeTube metal become cathode in itself and protected or can will
A kind of relatively more active metal of chemism is attached on pipeline, and the two is made to form primary battery, metal more active at this time
It is corroded and pipeline is then protected in itself；Media processes, including removing the ingredient or reconcile it that corrosivity is strong in mediumPH value；
Metal surface addition corrosion-inhibiting coating is (such as：Paint) completely cut off in steel tubing giving sufficient strength and air with thisOxygenContact, reaches guarantor with this
Protect effect；It adding " corrosion inhibiter ", corrosion inhibiter is made an addition to for slowing down a kind of specialist additive of corrosion in metal equipment, due to
The advantages that dosage is small, with good investment and with obvious effects, is pipeline and the prior development direction of other field aseptic technic, corrosion inhibiter
Anticorrosion principle can be described as anticaltalysis, i.e., with the catalyst principle used in Chemical Manufacture on the contrary, corrosion inhibiter can improveChange Learn reactionRequiredActivation energy, slow down the generation speed of corrosion reaction with this.
At present, structural texture is relatively simple in oil pipeline, double-deck purpose in the double-layer oil delivery pipe road that I invents now
Exactly add one layer of protection, prevent pipe leakage accident, oil leakage oil aspect, pipeline weathering soil oxidative attack are stolen in artificial destruction
In terms of protection, all improve a lot in terms of pipeline service life and pipe-line maintenance period etc.！It is for this purpose, it is proposed that a kind of double
The fabrication design production technology of layer oil transportation (ground) pipeline.
Invention content
The purpose of the present invention is to solve shortcoming in the prior art, and a kind of double-deck oil transportation (ground) proposed
The fabrication design production technology of pipeline.
The present invention proposes a kind of fabrication design production technology of double-deck oil transportation (ground) pipeline, includes the following steps：
Step 1: the pipe material of carbon steel tubing or Fine Steel Casting iron pipe as double-layer oil delivery pipe road is chosen, intermediate eight
A support plate is also by the use of carbon steel tubing or Fine Steel Casting iron pipe as material.
Step 2: add corrosion-inhibiting coating (as painted) inside and outside the oil pipeline on two layers of outer wall in its metal surface,
Then also " corrosion inhibiter " is added in metal equipment.
Step 3: then pipeline connection screw thread, welding and these three modes of flange, general pipeline are connected all in accordance with caliber
Size select final connection mode, it is common for pressure it is not high, caliber it is small use screw thread, caliber it is big with welding and method
Orchid carries out pipeline connection.Also still using common valve, general common valve has block valve, non-return for the control of pipeline
Valve, distributing valve etc..
Description of the drawings
Attached drawing 1 is the front (schematic diagram one) of double-deck oil transportation (ground) piping drawing, is exactly to add one using double-deck purpose
Layer protection is preventing pipe leakage accident, and oil leakage oil aspect is stolen in artificial destruction, in terms of pipeline weathering soil oxidative attack protection,
All improve a lot in terms of pipeline service life and pipe-line maintenance period etc.！Pipeline is double layer design, inside sets eight supports
Frame structure has peculiar design in pipeline material, pipeline corrosion protection design aspect etc..
Attached drawing 2 is the side (schematic diagram two) of double-deck oil transportation (ground) piping drawing.
Specific embodiment
The present invention proposes a kind of fabrication design production technology of double-deck oil transportation (ground) pipeline, includes the following steps：
Step 1: the pipe material of carbon steel tubing or Fine Steel Casting iron pipe as double-layer oil delivery pipe road is chosen, intermediate eight
A support plate is also by the use of carbon steel tubing or Fine Steel Casting iron pipe as material.
Step 2: add corrosion-inhibiting coating (as painted) inside and outside the oil pipeline on two layers of outer wall in its metal surface,
Then also " corrosion inhibiter " is added in metal equipment.
Step 3: then pipeline connection screw thread, welding and these three modes of flange, general pipeline are connected all in accordance with caliber
Size select final connection mode, it is common for pressure it is not high, caliber it is small use screw thread, caliber it is big with welding and method
Orchid carries out pipeline connection.Also still using common valve, general common valve has block valve, non-return for the control of pipeline
Valve, distributing valve etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (7)
1. choose the pipe material of carbon steel tubing or Fine Steel Casting iron pipe as double-layer oil delivery pipe road, intermediate eight support plates
By the use of carbon steel tubing or Fine Steel Casting iron pipe as material.
It, then will also be 2. add corrosion-inhibiting coating (as painted) inside and outside the oil pipeline on two layers of outer wall in its metal surface
" corrosion inhibiter " is added in metal equipment.
3. and then pipeline connection screw thread, welding and these three modes of flange, general pipeline connection come all in accordance with the size of caliber
Select final connection mode, it is common for pressure it is not high, caliber it is small use screw thread, caliber is big to be carried out with welding with flange
Pipeline connects.Also still using common valve, general common valve has block valve, check-valves, distributing valve for the control of pipeline
Deng.
4. the tubing used in oil pipeline is mainly carbon steel tubing, can be divided into again according to its manufacturing processSeamless steel pipeWith welding steel
Pipe.Seamless steel pipe has the features such as intensity is high, and specification is more, therefore suitable under the stronger oil product of corrosivity or hot conditions
Conveying.Seamless steel pipe is divided into as two kinds of hot rolling and cold-drawn.Since cold-drawn processing can cause material hardening, also need to according to pipe
The particular use of material does corresponding heat treatment.Welded still pipe can be divided into two kinds of opposite joint steel pipe and unsuccessful welded pipe.Due to carbon steel
The operational characteristic of pipe results in such steel pipe and easily becomes fragile in low temperature, therefore is primarily adapted for use in room temperature pipeline, and tubing makes
With temperature also no more than 300 degrees Celsius, it is however generally that normal carbon steel pipe temperature in use is between 0 to 300 degree Celsius.If
Using high-qualityCarbon steelPipe then temperature application range and relaxes up to -40 to 450 degrees Celsius.The experimental pressure of steel pipe is generally public affairs
Claim 1.5 times of pressure.When the temperature of conveyed material is no more than 200 degrees Celsius, operating pressure is exactly nominal pressure.Work as temperature
It is that operating pressure should accordingly be less than nominal pressure more than 200 degree.
5. pipeline connects and control
Connection and flange
Oil pipeline must use certain on-link mode (OLM) that could form a complete system.The connection mode of pipeline mainly has silk
Button, welding and flanged joint three classes.Pressure is not high, and the method connection of screw thread, such connection may be used in the little pipeline of caliber
Method is more convenient, but since most trunk petroleum pipeline calibers are generally all larger, uses other two kinds of connection methods more.
The pipeline of DN >=50 uses the method connection of welding substantially, and welding is excellent with easy for construction, firm, tight and saving steel etc.
Point, the position that dismounting is not needed on general straight tube or detour all can be used.Pipeline and valve or other equipment are (such as：Pump) even
The place that the place of connecing and pipeline needs are dismantled all usesFlangeConnection, to ensure the tightness of flange connections, also in flange two
Side is required for that the opposite soft flange gasket of matter is used to be assisted.Flange can be divided mainly into downhand welding, screw thread, right according to manufacture craft
The several types such as weldering, pine set and blind plate, contribute between pipeline interconnect other than blank flange, if desired connect not
With the pipeline of diameter, the corresponding adapter flange of both ends diameter can also be used.Blank flange comes directly towards the closing of one end for pipeline,
Therefore design can bear larger bendingStress。[4]
Valve and control
Valve be for open, close or control pipeline in media flow mechanical device.The type of valve is various, classification side
Method also there are many.If by purposes divide, can be divided into block valve,Check-valves, distributing valve etc.；If pressing force differentiation can be divided into vacuum valve
(operating pressure is less thanStandard atmospheric pressure), low pressure valve (PN≤1.6MPa), middle pressure valve (PN=2.5-6.4MPa) and high pressure valve (PN
=10-80MPa).If hand-operated valve, power drive valve and automatic valve can be divided by type of drive, also by temperature or material etc.
Etc. different sorting techniques.Gate valve is valve base and valve plate equality, and valve plate, with valve rod vertical up-or-down movement, is cut by handwheel with this
It is disconnected or open pipeline, while adjustable pipeline opens ratio.Due to the characteristic of flashboard, when being normally applied,Gate valveMostly standard-sized sheet
Or fully closed adjusting, it is less for flow-rate adjustment, but gate valve has the advantages that good seal performance and easy to maintenance.The spool of shut-off valve
It vertically falls on pedestal, valve seat and pipeline centerline parallel, fluid flow in valve body in serpentine state, fluidResistanceIt is larger, it cuts
Only valve is generally used for flow-rate adjustment, and with manufacture and it is easy to maintenance a little but while closing, easily leaks, leakproofness is not so good as lock
Valve.
In the laying of long-distance transmission pipeline, valve must be installed along the line, and 32km is not to be exceeded in spacing, if pipeline is by way of the signs of human habitation
Rare area then can suitably relax.It is being worn along Buried Oil Pipelines across populations such as Large River, lake, reservoir and cities and towns
The pipe ends of City Regions think needs according to orographic condition, must set valve.The installation position of block valve should not be byGeological disasterAnd flood influence, and to meet traffic convenience, the convenient needs of maintenance, and protection facility should be set.
6. PROCESS SUMMARY
Single product conveying
The oil pipeline of long range is made of oil transportation station and pipeline two parts, and length is up to several hundred kilometers even longer, Yan Xianshe
There are initial station, several intermediate stations and terminal.Same oil product in-line flows consumed energy and is provided by oil transportation station, therefore
It should be understood that the operational characteristic of pipeline is with determining specific equipment situation under different situations.Conveying light-end products (such as gasoline,Aviation KeroseneWithDiesel oilDeng) pipeline, due to mediumViscositySmall, good fluidity, therefore do not need to heat along the line, the temperature of medium and pipeline
Degree is equal with surrounding soil temperature, and such oil pipeline is referred to as " Isothermal Oil Pipeline ", and such technique is without consideringThermodynamics
Factor, it is thus only necessary to the power provided from pressure balanced pumping plant needed for hydromechanical angle estimator and pipeline.When institute is defeated
The medium sent for easily solidification, high viscosity (such as：The higher China's Mainland of wax content itDaqing oil fieldOil-producing) when, if itsCondensation pointIt is high
It when viscosity is very high under the environment temperature or environment temperature of pipeline, can not directly be conveyed using isothermal method, because excessively high
Viscosity the pressure drop of pipeline can be caused to greatly increase, can not only expend a large amount of power and have security risk, thus must using heating
The method of conveying with achieve the effect that reduce viscosity, less frictional resistance.Heating system keeps the temperature of pipeline with the outer wall in pipeline
Degree reaches the needs of conveying.In order to enable the energy of heating pipe less can lose, the pipeline of general heated transportation is required for
Heat-preserving equipment is wrapped up, heat-preserving equipment package pipeline and heating system are also referred to as insulating layer, and the substance of insulating layer should have poorIt leads It is hot, and must have high temperature resistant, resistCorrosion, the features such as vibration resistance and water imbibition are weak, chemical stability is good, it is generally softIt is nonmetallicMixing material is (such as：Blanket of glass wool etc.).Protective device has been also needed to protect outside insulating layer, and the most commonly used is galvanized iron
Skin.
Sequentially-fed
Main entry：Sequentially-fed
Sequentially-fed is in a pipeline, according to certain batch and sequence, is continuously conveyed different types ofOil productConveying
Method, also known as " Alternating Transportation " or " contaminated product conveying ".Sequentially-fed can maximally utilise the capacity of pipeline, with this
Cost-effective increase benefit, and lower the transport pressure of the oily mode of other fortune such as railway, thus it is national in the U.S. and Russia etc.
It is widely used.The oil pipeline that China also has section of tubing especially military uses sequentially-fed technique.Sequentially-fed is main
Critical technological point be the processing of generated contaminated product when variety classes oil product conveys successively and how to reduce contaminated product to the greatest extent
It generates, reducing contaminated product and may be used makes oil product be kept in transmission processTurbulent flowFluidised form and using mechanical device orGelIsolation
Method is realized, wherein the use of gel isolation being current more potential effective ways.
7. corrosive pipeline and anti-corrosion
Main entry：Corrosive pipeline
Due in the oil product of conveying contain element sulphur and acidic materials, additional pipeline it is exposed outdoor by wind and weather, cause
Pipeline is easily corroded.Corrosive pipeline is mainly the following：ByPrimary batterySteel caused by principleOxygen uptake is corroded；Due to acid rain
Cause the great acidity of pipe surface sulfide (sulfur dioxide andHydrogen sulfide) caused byGas-evolving electrodes；Caused by Atmospheric precipitation
Carbon dioxide sour corrosion；Pipe surface can be metabolizedSulfateBacterium caused by caused by bacterial corrosion and pipeline internal water accumulation
Corrosion etc., wherein oxygen uptake corrosion are most corrosion conditions, and principle is as follows：
Under neutrallty condition：O2+2H+4e→2OH
Under alkaline condition：O2+2H2O+4e→4OH
Under acid condition：O2+4H+4e→2H2O
Since the origin cause of formation of corrosive pipeline is not quite similar with condition, pipeline corrosion protection also has following several according to different corrosion conditions
The different method of kind：Reasonable material selects different types of material according to different pumped (conveying) mediums and environmental condition；CathodeIt protects
Shield, is exactly external dc power supply, is to be originally used forAnodeTube metal become cathode in itself and protected or can will changed
It learns a kind of relatively more active metal of activity to be attached on pipeline, the two is made to form primary battery, metal quilt more active at this time
Corrosion and pipeline is then protected in itself；Media processes, including removing the ingredient or reconcile it that corrosivity is strong in mediumPH value；Gold
Metal surface addition corrosion-inhibiting coating is (such as：Paint) completely cut off in steel tubing giving sufficient strength and air with thisOxygenContact, reaches protection with this
Effect；Add " corrosion inhibiter ", corrosion inhibiter is made an addition to for slowing down a kind of specialist additive of corrosion in metal equipment, due to
The advantages that small, with good investment and with obvious effects is measured, is pipeline and the prior development direction of other field aseptic technic, corrosion inhibiter is prevented
Corrosion principle can be described as anticaltalysis, i.e., with the catalyst principle used in Chemical Manufacture on the contrary, corrosion inhibiter can improveChemistry ReactionRequiredActivation energy, slow down the generation speed of corrosion reaction with this.
At present, structural texture is relatively simple in oil pipeline, and double-deck purpose in the double-layer oil delivery pipe road that I invents now is exactly
Add one layer of protection, prevent pipe leakage accident, oil leakage oil aspect, pipeline weathering soil oxidative attack protection are stolen in artificial destruction
All improve a lot in terms of aspect, pipeline service life and pipe-line maintenance period etc..For this purpose, it is proposed that a kind of bilayer is defeated
The fabrication design production technology of oily (ground) pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499594.5A CN108223929A (en) | 2017-12-21 | 2017-12-21 | A kind of bilayer oil transportation（On the ground）Pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499594.5A CN108223929A (en) | 2017-12-21 | 2017-12-21 | A kind of bilayer oil transportation（On the ground）Pipeline |
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| Publication Number | Publication Date |
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| CN108223929A true CN108223929A (en) | 2018-06-29 |
Family
ID=62642543
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|---|---|---|---|
| CN201711499594.5A Withdrawn CN108223929A (en) | 2017-12-21 | 2017-12-21 | A kind of bilayer oil transportation（On the ground）Pipeline |
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2017
- 2017-12-21 CN CN201711499594.5A patent/CN108223929A/en not_active Withdrawn
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|---|---|---|---|---|
| CN204226878U (en) * | 2014-09-23 | 2015-03-25 | 桐乡市远邦传感器有限公司 | A kind of outdoor use plastic pipe |
| CN204267919U (en) * | 2014-12-01 | 2015-04-15 | 杭州管康塑业有限公司 | A kind of condensate-proof moulds pipe |
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Application publication date: 20180629 |