CN107462514A - A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion - Google Patents
A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion Download PDFInfo
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- CN107462514A CN107462514A CN201710735678.8A CN201710735678A CN107462514A CN 107462514 A CN107462514 A CN 107462514A CN 201710735678 A CN201710735678 A CN 201710735678A CN 107462514 A CN107462514 A CN 107462514A
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- storage tank
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- 230000007797 corrosion Effects 0.000 title claims abstract description 117
- 238000005260 corrosion Methods 0.000 title claims abstract description 117
- 238000003860 storage Methods 0.000 title claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims abstract description 72
- 239000000725 suspension Substances 0.000 claims abstract description 53
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 230000014759 maintenance of location Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 9
- 239000010779 crude oil Substances 0.000 claims description 7
- 210000005069 ears Anatomy 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 description 52
- 239000003921 oil Substances 0.000 description 18
- 239000008346 aqueous phase Substances 0.000 description 7
- 229920000742 Cotton Polymers 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
Abstract
A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion, belongs to storage tank technical field.It is characterized in that：Storage tank includes tank body（19）And it is arranged on tank body（19）Interior mounting bracket, fixed test module and suspension detection module（11）, mounting bracket is vertically provided at tank body（19）It is interior, and mounting bracket is provided with and is used to be arranged on tank body（19）On retention mechanism, stationary monitoring module be vertically provided with it is multiple, stationary monitoring module be arranged on mounting bracket on, suspension monitoring modular（11）It is also equipped with multiple, suspension monitoring modular（11）It is connected by tightrope with mounting bracket or stationary monitoring module.Originally reaction corrosion overall picture can be realized by being capable of the steel atmospheric storage tank of on-line checking medium internal corrosion；This detection method predicts the corrosion class of tank body by the maximum spot corrosion speed and average corrosion rate of lacing film, it is achieved thereby that the on-line checking of tank body internal corrosion.
Description
Technical field
A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion, belongs to storage tank technical field.
Background technology
Steel atmospheric storage tank is faced with the problem of tank bottom, tank deck, serious local girth sheets internal corrosion in oilfield stations storehouse, to normal
Pressure storage tank safe operation brings huge potential safety hazard.SY/T 0087.3-2010《Steel pipe and Corrosion of Tanks evaluation mark
Quasi- Corrosion of Tanks is directly evaluated》The issuing and implementation of standard, steel atmospheric storage tank medium internal corrosion on-line monitoring is proposed clearly
Requirement.And oil field is also without the equipment available for steel atmospheric storage tank medium internal corrosion speed on-line monitoring at present.Therefore, have
A set of steel atmospheric storage tank medium internal corrosion on-Line Monitor Device is researched and developed in necessity design, and then to atmospheric storage tank medium internal corrosion machine
Reason conducts a research, and forms a set of science, applicable steel atmospheric storage tank on-line monitoring technique and evaluation method system.
At present, using weight loss method tested media corrosion rate it is generally acknowledged both at home and abroad, corrosion the most effective
Rate Test Method, and this method has obtained extensively in the field such as the monitoring of gathering line dielectric corrosion speed and evaluating drug
Using, for steel atmospheric storage tank internal corrosion monitoring device design established early stage basis.More typical atmospheric storage tank in oil field
Form, typically there are mud, water, the gentle several materials of oil in storage tank from bottom to top, and the corrosion property difference of every kind of material is larger.Its
In, profit and the interface of oil and gas can be changed without fixation with the condition of production, it requires that monitoring lacing film can be with the change at interface
And fluctuate, and then realize the corrosion monitoring of profit, the interface of oil and gas.Therefore, it is necessary to for atmospheric storage tank different height, layer
Position and the corrodible property of phase region, design develop it is a set of in the atmospheric storage tank it is flexible, applicable, can arbitrarily dismantle assembling
Lacing film on-Line Monitor Device.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided one kind can be completed online to storage
Tank medium internal corrosion is monitored, and the corrosion of different height, different medium, layer position and phase region can be monitored can
The steel atmospheric storage tank and detection method of on-line checking medium internal corrosion.
The technical solution adopted for the present invention to solve the technical problems is：This is capable of the steel of on-line checking medium internal corrosion
Atmospheric storage tank, it is characterised in that：Including tank body and the mounting bracket being arranged in tank body, fixed test module and the detection mould that suspends
Block, mounting bracket are vertically provided in tank body, and mounting bracket is provided with the retention mechanism for being used for being arranged on tank body, stationary monitoring mould
Block be vertically provided with it is multiple, stationary monitoring module be arranged on mounting bracket on, suspension monitoring modular be also equipped with it is multiple, hang
Floating monitoring modular is connected by tightrope with mounting bracket or stationary monitoring module.
Preferably, described retention mechanism includes mounting means and horizontally disposed more fix bars, mounting means are same
Axle is arranged on the upside of mounting bracket, and more fix bars surround mounting means uniformly at intervals, and more fix bars and mounting means screw thread
Connection, more fixed rod supports are in the gas outlet of tank body or load is placed on the upside of gas outlet.
Preferably, described mounting bracket is spliced by the more mounting rods being coaxially disposed, and is passed through per adjacent mounting rod
Adapter sleeve is removably connected.
Preferably, described stationary monitoring module includes the lacing film in mounting disc and mounting disc, the middle part set of mounting disc
Be located on mounting bracket, lacing film be fitted around disk axis have uniformly at intervals it is multiple.
Preferably, the middle part of described mounting disc is provided with pilot hole, and mounting disc is set on mounting bracket by pilot hole, dress
Inside limiting stand is provided with distribution, mounting bracket sidepiece is provided with the stopper slot being engaged with limiting stand.
Preferably, described suspension monitoring modular includes suspension ball, balancing weight and lacing film, the upside of balancing weight and suspension
Ball is connected, and downside, which is provided with, is used to installing the connecting portion of tightrope, and lacing film has the centre of sphere uniformly at intervals multiple around suspension ball, multiple
Lacing film is arranged in same level.
Preferably, there are multiple lacing film ears uniformly at intervals around described suspension ball, multiple lacing film ears are arranged at same water
In plane, two lacing films are symmetrically installed with each lacing film ear.
A kind of detection method of the above-mentioned steel atmospheric storage tank for being capable of on-line checking medium internal corrosion, it is characterised in that：
Each suspension detection module includes multiple lacing films, and each fixed test module also includes multiple lacing films, and lacing film uses with tank body
It is prepared by identical material；
Detection method comprises the following steps：
Step（1）, different phase region interfaces set suspension detection module in tank body, and fixed inspection is set in each phase region of tank body
Survey module；
Step（2）, after test period t reaches 1 ~ 8 month, by the lacing film of suspension detection module and the lacing film of fixed test module
Take out, and remove invalid lacing film；
Step（3）, each phase region and each phase region interface choose multiple lacing films, obtain each phase region and phase region interface pair respectively
Answer the average corrosion rate of lacing film and maximum spot corrosion speed；
Maximum spot corrosion speed is the ratio of maximum corrosion pit depth and test period t, and unit is mm/, wherein maximum corrosion is deep
Degree is the maximum of lacing film corrosion pit depth；
The calculation formula of average corrosion rate is as follows：
,
Wherein, V is average corrosion rate, and unit is mm/；For being averaged for same phase region or multiple lacing films at phase region interface
Weightlessness, unit g；S be single lacing film sudden and violent leakage area, unit mm2；
Step（4）, the corrosion class of tank body is predicted according to the maximum spot corrosion speed and average corrosion rate of lacing film, and take correspondingly
Control measures.
Preferably, described tank body includes water pot tank body or crude oil storage tank tank body, and test period t is corresponding to water pot tank body
1 ~ 3 month, test period corresponding to crude oil storage tank tank body was 6 ~ 8 months.
Preferably, step（2）Described in the maximum that includes positioned at same phase region or phase region interface of invalid lacing film it is weightless poor
The lacing film of serious crevice corrosion be present in the different lacing film for exceeding average weightless value 40%, and installation portion.
Compared with prior art, beneficial effect possessed by the present invention is：
1st, be originally capable of the suspension monitoring modular of the steel atmospheric storage tank of on-line checking medium internal corrosion by tightrope and mounting bracket or
Stationary monitoring module is connected, so that using the principle of buoyancy, suspension monitoring modular is realized as interface is fluctuated, so as to two
Corrosion condition between kind interface is monitored, and stationary monitoring module can be monitored to different phase regions respectively, so as to
Reaction corrosion overall picture is realized, avoids monitoring blind spot, realizes the corrosion of different medium in tank body, different height, layer position and phase region
Monitoring, and dismount the various constant pressure tank bodies that flexibly and easily, can meet in the production of oil field.
2nd, fix bar load is placed on the upside of tank body gas outlet or is supported on gas outlet inwall, convenient disassembly.
3rd, mounting bracket is removably spliced by multistage mounting rod, convenient to carry, dismantle, flexibly and easily, while length
Adjustable, the tank body internal corrosion suitable for different height monitors.
4th, lacing film is fixed on mounting bracket by mounting disc, convenient disassembly, realizes mud area, aqueous phase in some cycles
The corrosion monitoring in area, oil phase area and gas phase zone；Mounting disc is arranged on mounting bracket by pilot hole, and passes through limiting stand and limit
Position groove carry out it is spacing, avoid lacing film position be moved influence monitoring result.
5th, lacing film is arranged in mounting disc by insulating bar, and avoid lacing film is caused monitoring to be tied by the influence of installation environment
Fruit is inaccurate, and each insulating bar both sides are arranged with two lacing films, so as to be monitored by two lacing films to same position,
The generation of abnormal conditions is avoided, improves the accuracy of monitoring.
The 6th, balancing weight is installed on suspension ball, so as to the adjustable float density by way of balancing weight, it can be made
Suitable for the monitoring of different oil properties, there is popularity using upper；The both sides of each lacing film ear are arranged with multiple lacing films,
So as to avoid the generation of abnormal conditions, the accuracy of monitoring is improved.
7th, the detection method for being originally capable of the steel atmospheric storage tank of on-line checking medium internal corrosion passes through different phase regions or phase region
The maximum spot corrosion speed of the lacing film at interface and average corrosion rate predict the corrosion class of tank body, it is achieved thereby that rotten in tank body
The on-line checking of erosion, and it is easy to detect, corrosion class prediction can be carried out to different phase regions and phase region interface, detect no blind spot,
It is easy to use.
8th, the phase region of water pot tank body is few, and the corrosion of tank body is very fast, therefore it is 1 ~ 3 month to test experiment, crude oil storage tank
The phase region of tank body is more, and corrosion rate is slower, therefore test period is 6 ~ 8 months, so that according to the medium of storage tank storage not
With test period is determined, it can either ensure that result is accurate, the problem of and can enough avoids the occurrence of tank body internal corrosion monitoring not in time.
9th, maximum weightless difference exceedes the lacing film of average weightless value 40% and installation portion has the extension of serious crevice corrosion
Piece can not really reflect the situation of tank body internal corrosion, therefore result of the test can be impacted, and remove invalid lacing film and improve
The degree of accuracy of internal corrosion prediction.
Brief description of the drawings
Fig. 1 is the main view schematic cross-sectional view for the steel atmospheric storage tank for being capable of on-line checking medium internal corrosion.
Fig. 2 is the partial enlarged drawing at A in Fig. 1.
Fig. 3 is the partial enlarged drawing at B in Fig. 1.
Fig. 4 is the schematic top plan view of mounting means.
Fig. 5 is the schematic front view of suspension monitoring device.
Fig. 6 is the schematic top plan view of mounting disc.
Fig. 7 is the scheme of installation of strip lacing film.
In figure：1st, mounting means 2, fix bar 3, locking nut 4, adapter sleeve 5, mounting rod 6, mounting disc 601, peace
Fill hole 602, pilot hole 603, limiting stand 7, insulating bar 8, standard lacing film 9, lower installed part 10, cotton cord 11, suspension prison
Survey module 12, upper connecting rod 13, lower connecting rod 14, connecting plate 15, balancing weight 16, suspension ball 17, lacing film ear 18, length
Strip lacing film 19, tank body 1901, gas outlet.
Embodiment
Fig. 1 ~ 7 are highly preferred embodiment of the present invention, and 1 ~ 7 the present invention will be further described below in conjunction with the accompanying drawings.
A kind of steel atmospheric storage tank for being capable of on-line checking medium internal corrosion, including tank body 19 and be arranged in tank body 19
Mounting bracket, fixed test module and suspension detection module 11, mounting bracket is vertically provided in tank body 19, and mounting bracket is provided with
For the retention mechanism on tank body 19, stationary monitoring module is vertically provided with multiple, stationary monitoring module peace
On mounting bracket, suspension monitoring modular 11 is also equipped with multiple, and suspension monitoring modular 11 passes through tightrope and mounting bracket or fixation
Monitoring modular is connected.Originally be capable of the suspension monitoring modular 11 of the steel atmospheric storage tank of on-line checking medium internal corrosion by tightrope with
Mounting bracket or stationary monitoring module are connected, so as to using the principle of buoyancy, realize suspension monitoring modular 11 with being floated downward on interface
Dynamic, so as to be monitored to the corrosion condition between two kinds of interfaces, stationary monitoring module can supervise to different phase regions respectively
Survey, so as to realize reaction corrosion overall picture, avoid monitoring blind spot, realize different medium in tank body 19, different height, layer position
And the corrosion monitoring of phase region, and dismount the various constant pressure tank bodies 19 that flexibly and easily, can meet in the production of oil field.
With reference to specific embodiment, the present invention will be further described, however persons familiar with the art it is to be appreciated that
It is to preferably explain here in connection with the detailed description that accompanying drawing provides, structure of the invention is inevitable beyond limited these
Embodiment, and for some equivalents or common approach, no longer it is described in detail herein, but still fall within the guarantor of the application
Protect scope.
As shown in Figure 1：Mounting bracket is spliced by more mounting rods 5 being coaxially disposed, and is led between every adjacent mounting rod 5
Cross adapter sleeve 4 to be connected, mounting rod 5 is vertically arranged.The outer wall of mounting rod 5 is provided with screw thread, and the inwall of adapter sleeve 4 also is provided with spiral shell
Line, it is connected per two adjacent mounting rods 5 by screw thread with adapter sleeve 4, so as to complete the assembling of mounting bracket, mounting bracket dismounting side
Just, the internal corrosion of tank body 19 suitable for different height monitors.
Retention mechanism is arranged on the upper end of mounting bracket, and retention mechanism is used to mounting bracket being arranged in tank body 19, fastening dress
Put on the gas outlet 1901 for being fixed on tank body 19.The downside of mounting bracket is provided with lower installed part 9, the stationary monitoring module peace of lower side
On lower installed part 9, the downside of the mounting rod 5 of lower side is provided with lower connecting rod 13, and the outer wall of lower connecting rod 13 is provided with screw thread,
The upper end of lower connecting rod 13 is removably connected by adapter sleeve 4 with the mounting rod 5 of lower side.The top of lower installed part 9 is provided with
The screwed hole of axial direction, the lower end of lower connecting rod 13 is removably connected by the screwed hole of lower installed part 9 with lower installed part 9.
In the present embodiment, suspension monitoring modular is fixed in stationary monitoring module by tightrope, and tightrope is cotton cord 10.
Stationary monitoring module includes the lacing film in mounting disc 6 and mounting disc 6, the extension wherein installed in stationary monitoring module
Piece is standard lacing film 8.Mounting disc 6 is disk, and the middle part of mounting disc 6 is provided with the pilot hole 602 of axial direction, the lower side ring of adapter sleeve 4
Fixing lug boss is provided with around outer wall, and the outer wall of adapter sleeve 4 is provided with screw thread, mounting disc 6 is set in adapter sleeve by pilot hole 602
4 outsides, the bottom of mounting disc 6 is positioned in fixing lug boss.The outer sheath of adapter sleeve 4 of the upside of mounting disc 6 is provided with locking nut 3,
Mounting disc 6 is fixed on adapter sleeve 4 by locking nut 3.The lower diameter of lower installed part 9 is more than upper diameter, so as under
Portion forms the positioning table for positioning, and the mounting disc 6 of the stationary monitoring module of lower side is set in the outside of lower installed part 9, and
The downside of mounting disc 6 is positioned on positioning table, and locking nut 3 also is provided with the lower installed part 9 of the upside of mounting disc 6, lower side
Mounting disc 6 is fixed on lower installed part 9 also by locking nut 3.Standard lacing film 8 is arranged on the outside of mounting disc 6, and standard is hung
Piece 8 has multiple uniformly at intervals around the axis of lower installed part 9.
The standard lacing film 8 of stationary monitoring module is arranged in mounting disc 6 by insulating bar 7, the upper end of insulating bar 7 and installation
Disk 6 is fixedly connected, and the both sides of each insulating bar 7 are arranged with a standard lacing film 8.Suspension monitoring modular passes through cotton cord 10
It is connected with insulating bar 7.In the present embodiment, mounting disc 6 is nylon plate.
In the present embodiment, stationary monitoring module has four, respectively to mud area, aqueous phase area, oil phase area and gas phase zone four
Individual phase region is monitored.
As shown in Figure 4：Retention mechanism includes mounting means 1 and fix bar 2, and mounting means 1 are horizontally disposed disk, on
Screwed hole is coaxially provided with installed part 1, the upside of mounting rod 5 of top side is provided with the upper connecting rod for being used for being connected with mounting means 1
12, the outer wall of upper connecting rod 12 is provided with screw thread, and the lower end of upper connecting rod 12 is removable by adapter sleeve 4 and the mounting rod 5 of top side
The connection unloaded, the upper end of mounting means 1 is removably connected by screw thread with mounting means 1, so as to complete mounting means 1
Installation.Fix bar 2 has horizontally disposed more, and more fix bars 2 are arranged in same level, the sidepiece of mounting means 1
There is the screwed hole of multiple radial directions uniformly at intervals, the outer wall of fix bar 2 is provided with screw thread, and fix bar 2 is removably installed by screw thread
In the screwed hole of the sidepiece of mounting means 1, by the length of the exposed parts of fix bar in regulation 2, steel tank body is placed on so as to carry on a shoulder pole
19 upside of gas outlet 1901, completes the installation of mounting bracket, mounting bracket convenient disassembly.In the present embodiment, fix bar 2 is around upper
Installed part 1 has three uniformly at intervals.
As shown in Figure 5：Suspension monitoring modular 11 includes suspension ball 16, balancing weight 15 and lacing film, wherein the monitoring mould that suspends
The lacing film installed on block is also standard lacing film 8.Suspension ball 16 is hollow spheroid, and suspension ball 16 is passed through by upper and lower two hemispheres
Welding is formed.Balancing weight 15 is cylindric, and the upper end of balancing weight 15 is connected with the middle part of suspension ball 16, the lower end peace of balancing weight 15
Equipped with connecting plate 14, connecting plate 14 is used to be connected with cotton cord 10, and connecting plate 14 is provided with through hole, so as to convenient and cotton cord 10
It is connected.There are multiple lacing film ears 17, lacing film uniformly at intervals around the center of suspension ball 16 at the middle part of the vertical direction of suspension ball 16
Ear 17 is arranged on the outer of suspension ball 16, and multiple lacing film ears 17 are arranged in same level.Each lacing film ear 17
Both sides are symmetrically installed with a standard lacing film 8.In the present embodiment, three lacing film ears 17 are spaced on each suspension ball 16.
In the present embodiment, suspension monitoring modular 11 is provided with two, and profit, the interface of oil and gas are supervised for monitoring
Survey, profit, the interface of oil and gas can float as liquid measure changes, it is desirable to which monitoring point can also fluctuate with interface.Therefore, hang
Floating monitoring modular 11 realizes that monitoring point is fluctuated using law of buoyancy.The observation interface of standard lacing film 8 is set on suspension ball 16
The corrosion at place.The buoyancy of material in a liquid is relevant with density, and only density can be suspended in profit circle between profit
At face, density, which is less than oil density, to be floated on pasta.
As shown in Figure 6：The outer of mounting disc 6 is provided with the mounting hole 601 for being used for installing insulating bar 7, in the present embodiment, peace
Dress hole 601 is provided with three.Mounting hole 601 is screwed hole, and the upper end of insulating bar 7 is provided with screw thread, and insulating bar 7 passes through screw thread and peace
Dress hole 601 removably connects.
Pilot hole 602 is coaxially disposed with mounting disc 6, and the inwall of pilot hole 602 is provided with inwardly projecting limiting stand 603, even
The outer wall of the outer wall of female connector 4 and lower installed part 9 is equipped with the stopper slot being engaged with limiting stand 603, so as to prevent mounting disc 6
Relatively rotated with adapter sleeve 4 or lower installed part 9.In the present embodiment, limiting stand 603 is provided with three.
As shown in Figure 7：Vertically there are multiple lacing films on mounting bracket uniformly at intervals, wherein, it is directly installed on mounting bracket
On lacing film be strip lacing film 18, the both ends of strip lacing film 18 are provided with the through hole for installing, and strip lacing film 18 passes through
Screw is arranged on mounting bracket.Spacing per two adjacent strip lacing films 18 is 20mm, is realized so as to more accurate
Reaction corrosion overall picture, in the absence of monitoring blind spot.Material phase of the material of standard lacing film 8 and strip lacing film 18 with tank body 19
Together.
This steel atmospheric storage tank medium internal corrosion on-Line Monitor Device utilizes sets multiple monitoring moulds that suspend on mounting bracket
Block 11, stationary monitoring module and strip lacing film 18, realize the dielectric corrosion monitoring of different height in tank.Mounting bracket uses
Multistage combination, it is convenient to carry, dismantle, flexibly and easily, while adjustable in length, suitable for rotten in the tank body 19 of different height
Erosion monitoring.According to law of buoyancy, suspension ball 16 is devised, lacing film ear 17 is set on suspension ball 16, realizes profit, oil gas circle
The monitoring corroded at face, suspension ball 16 can fluctuate according to the change at interface, all the time in interface, ensure that corrosion prison
The accuracy of survey.The density of suspension ball 16 is adjusted by way of balancing weight 15, it can be made to be applied to different oil properties
Monitoring, has popularity using upper.
A kind of detection method of the above-mentioned steel atmospheric storage tank for being capable of on-line checking medium internal corrosion, including following step
Suddenly：
Step（1）, different phase region interfaces set suspension detection module 11 in tank body 19, are set in each phase region of tank body 19
Fixed test module；
According to the medium species and the physical dimension of tank body 19 and interior media situation in tank body 19, each layer medium is understood in advance
Approximate location（Highly）, so as to set standard lacing film 8.When tank body 19 is water pot tank body, due to medium only have gas phase zone with
And aqueous phase area, therefore only need to set fixed test module respectively in gas phase zone and aqueous phase area, in gas-water interface, the inspection that suspends is set
Survey module 11；When storage tank 19 is crude oil storage tank tank body, due to medium have gas phase zone, oil phase area, aqueous phase area, mud area,
Gas-water interface and oil-water interfaces, it is therefore desirable to which in gas phase zone, oil phase area, aqueous phase area, mud area, fixed test mould is set respectively
Block, suspension detection module 11 is set in gas-water interface, oil-water interfaces.Vertically it is arranged at intervals on mounting bracket simultaneously multiple
Strip lacing film 18.Phase region refers to different areas of dielectric, gas phase zone, oil phase area, aqueous phase area or mud area described above, phase
Regional boundary face refers to the interface of different medium, gas-water interface described above, oil-water interfaces.
Step（2）, after test period t reaches 1 ~ 8 month, by the lacing film of suspension detection module 11 and fixed test module
Lacing film take out, and remove invalid lacing film；
Test period t according to by difference and adjust, when tank body 19 is water pot tank body, test period t be 1 ~ 3 month, when
When tank body 19 is crude oil storage tank tank body, test period t is 6 ~ 8 months.
After reaching predetermined test period, by each phase region and the standard lacing film 8 and strip lacing film 18 at phase region interface
Remove, and remove invalid lacing film, the maximum weightless difference that invalid lacing film is included positioned at same phase region or phase region interface exceedes average
The lacing film of serious crevice corrosion be present in the lacing film of weightless value 40%, and installation portion.Marked corresponding to each phase region and phase region interface
Quasi- lacing film 8 or strip lacing film 18 at least select three respectively.
Step（3）, each phase region and each phase region interface choose multiple lacing films, obtain each phase region and phase regional boundary respectively
Face corresponds to the average corrosion rate of lacing film and maximum spot corrosion speed；
Maximum spot corrosion speed is the ratio of maximum corrosion pit depth and test period t, and unit is mm/, wherein maximum corrosion is deep
Degree is the maximum of lacing film corrosion pit depth；
The calculation formula of average corrosion rate is as follows：
,
Wherein, V is average corrosion rate, and unit is mm/；For being averaged for same phase region or multiple lacing films at phase region interface
Weightlessness, unit g；S be single lacing film sudden and violent leakage area, unit mm2；
The average corrosion rate and maximum spot corrosion speed of standard lacing film 8 and strip lacing film 18 calculate respectively.Wherein, standard lacing film
8 and strip lacing film 18 weightlessness using assay balance measure, precision 0.1mg；Maximum corrosion depth uses probe and vernier
Kind of calliper, and need to remove corrosion product before measuring, at least to the six of three standard lacing films 8 or strip lacing film 18 during measurement
Individual surface measures, measurement accuracy 0.1mm.
Step（4）, the corrosion class of tank body 19 is predicted according to the maximum spot corrosion speed and average corrosion rate of lacing film, and adopt
Take corresponding control measures.
The corrosion class of specific prediction tank body 19 and the control measures taken are as follows：
When average corrosion rate is less than 0.025mm/, and maximum spot corrosion speed is less than 0.305mm/, corrosion class is one-level,
Now tank body 19 can be with normal use；
When average corrosion rate is between 0.026 ~ 0.125mm/, when maximum spot corrosion speed is less than 0.306 ~ 0.610mm/, corruption
Erosion grade is two level, it is necessary to monitor use；
When average corrosion rate is between 0.126 ~ 0.254mm/, when maximum spot corrosion speed is less than 0.611 ~ 2.438mm/, corruption
Erosion grade is three-level, it is necessary to the tank bottom acoustic emission detection of tank body 19, clear tank, reform interior anti-or modular repair reinforcement；
When average corrosion rate is more than 0.254mm/, and maximum spot corrosion speed is less than 2.438mm/, corrosion class is level Four,
Need the tank bottom acoustic emission detection to tank body 19, clear tank, partly or wholly scrap.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (10)
- A kind of 1. steel atmospheric storage tank for being capable of on-line checking medium internal corrosion, it is characterised in that：Including tank body（19）And set Put in tank body（19）Interior mounting bracket, fixed test module and suspension detection module（11）, mounting bracket is vertically provided at tank body （19）It is interior, and mounting bracket is provided with and is used to be arranged on tank body（19）On retention mechanism, stationary monitoring module vertically sets Be equipped with it is multiple, stationary monitoring module be arranged on mounting bracket on, suspension monitoring modular（11）It is also equipped with multiple, suspension monitoring modular （11）It is connected by tightrope with mounting bracket or stationary monitoring module.
- 2. the steel atmospheric storage tank according to claim 1 for being capable of on-line checking medium internal corrosion, it is characterised in that：It is described Retention mechanism include mounting means（1）And horizontally disposed more fix bars（2）, mounting means（1）It is co-axially located at peace Shelve upside, more fix bars（2）Around mounting means（1）Uniformly at intervals, and more fix bars（2）With mounting means（1）Spiral shell Line connects, more fix bars（2）It is supported on tank body（19）Gas outlet（1901）Interior or load is placed on gas outlet（1901）Upside.
- 3. the steel atmospheric storage tank according to claim 1 for being capable of on-line checking medium internal corrosion, it is characterised in that：It is described Mounting bracket by the more mounting rods being coaxially disposed（5）It is spliced, per adjacent mounting rod（5）Pass through adapter sleeve（4）It is removable That unloads is connected.
- 4. the steel atmospheric storage tank according to claim 1 for being capable of on-line checking medium internal corrosion, it is characterised in that：It is described Stationary monitoring module include mounting disc（6）And mounting disc（6）On lacing film, mounting disc（6）Middle part be set in mounting bracket On, lacing film is fitted around disk（6）Axis have uniformly at intervals it is multiple.
- 5. the steel atmospheric storage tank according to claim 4 for being capable of on-line checking medium internal corrosion, it is characterised in that：It is described Mounting disc（6）Middle part be provided with pilot hole（602）, mounting disc（6）Pass through pilot hole（602）It is set on mounting bracket, assembles Hole（602）It is interior to be provided with inside limiting stand（603）, mounting bracket sidepiece is provided with and limiting stand（603）The stopper slot being engaged.
- 6. the steel atmospheric storage tank according to claim 1 for being capable of on-line checking medium internal corrosion, it is characterised in that：It is described Suspension monitoring modular（11）Including suspension ball（16）, balancing weight（15）And lacing film, balancing weight（15）Upside and suspension ball （16）It is connected, downside is provided with the connecting portion for being used for installing tightrope, and lacing film has circular suspension ball（16）The centre of sphere uniformly at intervals more Individual, multiple lacing films are arranged in same level.
- 7. the steel atmospheric storage tank according to claim 6 for being capable of on-line checking medium internal corrosion, it is characterised in that：It surround Described suspension ball（16）There are multiple lacing film ears uniformly at intervals（17）, multiple lacing film ears（17）It is arranged in same level, Each lacing film ear（17）On be symmetrically installed with two lacing films.
- A kind of 8. detection side of the steel atmospheric storage tank for being capable of on-line checking medium internal corrosion described in any one of claim 1 ~ 7 Method, it is characterised in that：Each suspension detection module（11）Including multiple lacing films, each fixed test module also includes multiple extensions Piece, and lacing film and tank body（19）Prepared using identical material；Detection method comprises the following steps：Step（1）, in tank body（19）Interior different phase region interfaces set suspension detection module（11）, in tank body（19）Each phase region Interior setting fixed test module；Step（2）, after test period t reaches 1 ~ 8 month, by the detection module that suspends（11）Lacing film and fixed test module Lacing film takes out, and removes invalid lacing film；Step（3）, each phase region and each phase region interface choose multiple lacing films, obtain each phase region and phase region interface pair respectively Answer the average corrosion rate of lacing film and maximum spot corrosion speed；Maximum spot corrosion speed is the ratio of maximum corrosion pit depth and test period t, and unit is mm/, wherein maximum corrosion is deep Degree is the maximum of lacing film corrosion pit depth；The calculation formula of average corrosion rate is as follows：,Wherein, V is average corrosion rate, and unit is mm/；For being averaged for same phase region or multiple lacing films at phase region interface Weightlessness, unit g；S be single lacing film sudden and violent leakage area, unit mm2；Step（4）, tank body is predicted according to the maximum spot corrosion speed and average corrosion rate of lacing film（19）Corrosion class, and take Corresponding control measures.
- 9. detection method according to claim 8, it is characterised in that：Described tank body（19）Including water pot tank body or crude oil Storage tank tank body, test period t corresponding to water pot tank body are 1 ~ 3 month, and test period corresponding to crude oil storage tank tank body is 6 ~ 8 Month.
- 10. detection method according to claim 8, it is characterised in that：Step（2）Described in invalid lacing film include be located at The maximum weightless difference at same phase region or phase region interface exceedes the lacing film of average weightless value 40%, and installation portion is present seriously The lacing film of crevice corrosion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710735678.8A CN107462514A (en) | 2017-08-24 | 2017-08-24 | A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion |
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| CN201710735678.8A CN107462514A (en) | 2017-08-24 | 2017-08-24 | A kind of steel atmospheric storage tank and detection method for being capable of on-line checking medium internal corrosion |
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| CN107462514A true CN107462514A (en) | 2017-12-12 |
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| CN109001103A (en) * | 2018-08-30 | 2018-12-14 | 浙江浙能台州第二发电有限责任公司 | The adjustable test piece film hangers waterborne of buoyancy |
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| CN111208055A (en) * | 2020-01-11 | 2020-05-29 | 长江大学 | Dynamic corrosion rate testing system for high temperature and high pressure |
| CN113533188A (en) * | 2021-08-13 | 2021-10-22 | 中国船舶重工集团公司第七二五研究所 | Real sea evaluation method for antifouling performance of coating in waterline area |
| CN114433580A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Online oil sludge flushing device and method for storage tank bottom plate |
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| CN110118719A (en) * | 2018-02-07 | 2019-08-13 | 中国石油天然气股份有限公司 | A kind of method and apparatus carrying out material corrosion evaluation with uniform corrosion rate |
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| CN111208055A (en) * | 2020-01-11 | 2020-05-29 | 长江大学 | Dynamic corrosion rate testing system for high temperature and high pressure |
| CN114433580A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Online oil sludge flushing device and method for storage tank bottom plate |
| CN114433580B (en) * | 2020-10-20 | 2023-05-26 | 中国石油化工股份有限公司 | Online oil sludge flushing device and flushing method for storage tank bottom plate |
| CN113533188A (en) * | 2021-08-13 | 2021-10-22 | 中国船舶重工集团公司第七二五研究所 | Real sea evaluation method for antifouling performance of coating in waterline area |
| CN113533188B (en) * | 2021-08-13 | 2024-02-02 | 中国船舶重工集团公司第七二五研究所 | Real sea evaluation method for antifouling property of waterline area coating |
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Application publication date: 20171212 |