CN106323385A - Online detection of storage tank, assessment method and device - Google Patents

Online detection of storage tank, assessment method and device Download PDF

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Publication number
CN106323385A
CN106323385A CN201610963564.4A CN201610963564A CN106323385A CN 106323385 A CN106323385 A CN 106323385A CN 201610963564 A CN201610963564 A CN 201610963564A CN 106323385 A CN106323385 A CN 106323385A
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China
Prior art keywords
storage tank
tank
detection
assessment
online
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Inventor
徐慎忠
胡军
张延兵
王晓梁
刘功祥
孙志涛
张�诚
陆倩
张乃燕
吴航
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Special Equipment Safety Supervision Inspection Institute of Jiangsu Province Nantong Branch
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Special Equipment Safety Supervision Inspection Institute of Jiangsu Province Nantong Branch
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Priority to CN201610963564.4A priority Critical patent/CN106323385A/en
Publication of CN106323385A publication Critical patent/CN106323385A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass

Abstract

The invention provides a method to test, detect and assess storage tank online, including the following steps: collection of storage tank's basic information and safe condition, tank body corrosion and leak detection and assessment, stability tests and assessment of tank structure, foundation detection and assessment of tank structure, detection and assessment of storage tank's subsidiary facilities and overall safety assessment of storage tank. The invention makes definite the storage tank's detection method and items, assessment content and methods. On one hand, the invention provides basis for safety management of storage tanks in enterprise, reduces or avoids blind detection and reduce safety management cost of storage bank. On the other hand, the safety supervision means for authorities improves management efficiency and effect, and reduces management cost. With effective implementation of the method, accident risks caused by storage tank will be reduced greatly, reducing economic losses incurred therefrom.

Description

The online inspection of storage tank and appraisal procedure, device
Technical field
The invention belongs to testing techniques of equipment field, be specifically related to a kind of online inspection of storage tank and appraisal procedure, dress Put.
Background technology
Storage tank is widely used in the numerous areas such as water transport, traffic, oil, chemical industry transport, is that deposit oil product, fluid chemical are former The special equipment of material and products thereof, it stores thing often has flowing diffusion, expanded by heating inflammable and explosive, volatile, easy, easily produces Raw electrostatic, the dangerous hazard profile such as poisonous, belong to the extraordinary production equipment of high risk.For petrochemical pier storage tank skirt, due to Its a large amount of integrated distribution, and how riverine, along the river or construction of bordering on the sea, wherein a storage tank has an accident, and easily causes chain Reaction, cause leakage, fire, explode, the catastrophic failure such as poisoning, wherein the destruction of air and water body is particularly acute, this type of Accident has extremely strong diffusibility, is easily generated accident spills-over effects, causes larger range of secondary to destroy, is also easy to the strongest , there is social event in social effect, and therefore petrochemical pier storage tank reservoir area all becomes the major hazard source in possession, and it is all entered by government Row emphasis security control.
At present, the 5000m that the enterprise such as domestic petroleum, chemical industry, aviation, harbour has3Above large-scale oil storage tank quantity is 2 More than ten thousand, due to China lack unified storage tank construction, design, manufacture, install, the relevant norm standard such as detection, different rows The storage tank standard that industry, different enterprise select all is not quite similar, the storage tank even built with the presence of the relevant criterion that has no basis in a large number, Storage tank operation risk is in higher state.For a long time, the security control of storage tank reservoir area rests on the safety to storage tank always and enters The ontological security of row macro-management, storage tank and affiliated facility is responsible for by enterprise always, and storage tank is not implemented to force inspection by ear country Surveying requirement, so for a long time, storage tank reservoir area all uses enterprise self-determining maintenance management mode, and this way to manage is due to enterprise The target of realized value limits, and causes the hidden troubles removing technical force wretched insufficiency to storage tank, year after year, causes storage tank hidden danger Overstock.At the initial stage of coming into operation, owing to equipment is also in the primary stage of life cycle, its margin of safety is relatively big, storage tank accident Hidden danger does not highlight, but along with storage tank uses the prolongation in cycle, substantial amounts of equipment failure starts to expose, if can not be timely and effective Discovery and keep in repair these defects, storage tank accident miscellaneous certainly will be produced.Just because of these reasons, reform and opening-up more than 30 Today after Nian, storage tank accident starts to concentrate in a large number appearance, such as accidents such as Dalian, Qingdao, Taizhou, Lanzhou, this just in the urgent need to Change irrational storage tank security control and working service way to manage in the past.
Owing to China starts late in terms of storage tank security control, storage tank management lacks qualified technical personnel, and lacks effective inspection Survey means and the safe evaluation method of science, storage tank detection technique level is relatively low, and current China is for the safety evaluation master of storage tank There are three kinds of modes: one is conventional can opening individual event detection, and two is online bottom corrosion acoustic emission detection, and three is inspection based on risk Survey (RBI).Wherein, storage tank individual event detection is the most detection method of application, ultrasonic including tank bottom corrosion Magnetic Flux Leakage Inspecting, tank skin Ripple thickness measuring, angle welding Magnetic testing etc., this type of detection method is both for the detection at storage tank single part or position, mainly with enterprise Industry self test mode is main, and current common practice is every the several years, storage tank to be carried out the states such as burn into leakage, intensity to carry out once Routine inspection is keeped in repair.But owing to most of defects of storage tank all occur in tank inside, individual event detection is directed to tank interior, It is accomplished by before maintenance every time all clearing out the medium in storage tank, and tank interior is fully cleaned, it is ensured that in tank body Existing without danger medium, just entered tank body by maintainer and check, this kind of storage tank safety management and maintenance mode mainly have The shortcoming of several respects once: (1) cost is huge: chemical industry and oil product storage tank are general all more than a kilostere, and have even reaches To several ten thousand steres, bulky, whole maintenance process needs experience medium derivation, clear tank, taste removal, detection, medium again to note The step such as enter, all processes may more than 30 days, with single storage tank calculate used by artificial, cleaning, sewage disposal etc. is correlated with Expense i.e. can reach four or five ten ten thousand more than, and this does not the most include the production suspension induced losses of enterprise;(2) environmental and safety problems is serious: every time Maintenance, in tank, derivation and the tank body of storage medium clean, hazardous chemical is the most easily leaked in natural environment, and this is also dangerous , there is huge potential safety hazard in link the weakest in chemical storage safety management, the most clear tank also will produce a large amount of Containing the waste liquid of hazardous chemical, serious environmental and safety problems just will be brought once deal with improperly;(3) blindness maintenance: The existing storage tank maintenance order Main Basis time between overhauls(TBO), ignore the safe condition ranking process of storage tank self, and for a long time Storage tank maintenance during find, have the storage tank of 80% need not within the time between overhauls(TBO) can opening maintenance, if according to existing Maintenance solution, arise that and do not need the storage tank of can opening to be overhauled by can opening in a large number, and some has severe compromise Storage tank, owing to not continuing to be on active service to the time between overhauls(TBO), the effect now overhauled just is had a greatly reduced quality, and its cost expended is the most frightened People;(4) detection method lacks science: the use unit overwhelming majority of hazardous chemical storage tank is all production and operation classes enterprise, Due to its management objectives limitation, put at the safety detection technology of storage tank and deficiency, current most enterprises will necessarily occur Storage tank self-inspection rely primarily on visual inspection, be aided with the detection method that ultrasonic thickness measurement etc. is conventional, detection means is single, its result Also lacking science data to support, defect detection rate is relatively low, and individual event testing result can not characterize the safe condition of whole storage tank, respectively examines Survey method not architectonical, it is difficult to provide supervision foundation for storage tank safety regulator;(5) detection mode not architectonical: at storage tank Use during, enterprise finds that certain position of storage tank or parts have those suspected defects or are likely to occur operation risk often, Just detecting this position, be still defaulted as safe for other positions, the conclusion of detection can only characterize detection object Safe condition, does not have for storage tank general safety and represents meaning, it is difficult to as the reference frame of storage tank security control.
Acoustic emission is a kind of common physical phenomenon, comes from material internal and is formed owing to discharging strain energy suddenly A kind of elastic stress wave, when the deformation of most of materials and fracture, acoustic emission occurs, and utilizes instrument to detect, records, analysis sound is sent out Penetrate signal, and then infer that acoustic emission source, technology to the active defects situation evaluation of detected object are referred to as acoustic emission detection skill Art.Online acoustic emission detection is non-intrusion type, do not stop production, unclear tank, economic and practical storage tank safe condition assessment technology, to storage Tank carries out safety on line evaluation, divides the safe class of storage tank, distinguishes the tank body needing to carry out comprehensive can opening maintenance, for storage tank The selection of periodic inspection maintenance objects provides technical basis.But there are the following problems for acoustic emission detection: (1) acoustic emission signal and letter Number difficult treatment: Acoustic emission signal processing analysis is to realize acoustic emission source qualitative recognition, location determination and quantitative assessment.AE signal Process the biggest problem faced, be first sudden and uncertain, the different AE source machine of the multiformity in AE source, signal itself System, can produce diverse AE signal.Secondly.The impact of AE signal transduction pathway, the signal that AE sensor is obtained is extremely Being the synthesis result of the factors such as sound source, transmission medium, couplant and transducer be corresponding less, acoustic emission signal is in material or structure Middle after multiple reflections, decay and waveform are changed, its waveform will occur the biggest distortion, and the sound wave that sound source sends can be through multiple Path reaches sensor, and superposition makes signal tend to complicated, additionally, due to the ringing effect of sensor itself, causes output letter Number more complicated;(2) interference noise is various: acoustic emission is for dynamic monitoring in the way of passive detection, and noise jamming is very Seriously, external interfering noise may be far longer than AE signal.AE detection interference noise mainly have: environment noise, mechanical noise and Electronic machine interference noise etc., the main temporal signatures of these noises be randomly distributed on whole sample space in the range of, no Only affect signal acquisition rate, and cause the hugest being difficult to of data of collection effectively to process, it is difficult to ensure that the reality of AE monitoring Shi Xing;(3) existing acoustic emission detection is many for software module and the data base of the detection range of atmospheric storage tank, more mature and reliable It is the corrosion for storage tank bottom and leak detection, fails to cover the corrosion to storage tank shell and the detection of weld defect, because The safety evaluation to storage tank globality cannot be completed, must combine application for the detection method of tank skin with other.
Detection (RBI) based on risk is to set up on the security of system ideal basis unified with economy pursuing A kind of optimize the method that detection is measured, for the risk supervision of storage tank, it is considered to be the common risk of storage tank, its main purpose Being the foundation of the detection offer selection order of priority for storage tank, itself be not detection, there are the following problems: (1) is due to China Defect during the congenital and use of storage tank exists the most simultaneously, the basic data (general failure probability) in RBI and analysis thereof Method can not be suitable for very well, and deviation is relatively big, and simple storage tank risk assessment is nonsensical;(2) RBI need material, inspection, The multi-specialized knowledge assistances such as chemical industry, chemistry, safety, determine for failure consequence system of selection and diffusion model, substance characteristics, examine Test the effect to risk reduction, Failure Factor determines, the problem of each side theory level, directly constrains domestic correlation technique Development with software;(3) American Petroleum Institute (API) (API) has formulated " welding oil storage tank technical specification " API Std 12C the most in one's early years, Promulgate that API Std 653-2001 (2003a) inspection of the storage tank ", repair, change and rebuild " is to the inspection of oil storage tank at present Test and carried out detailed regulation, but lot of domestic and international storage tank RBI software rests on the software implementation to API653, ignores specification The a lot of mistakes inherently existed and leak;(4) China due to the birth defect in device fabrication and lacks projected life etc. Factor, generally there is extended active duty situation in storage tank, therefore run safe condition assessment may with external API standard in equipment Design and the most satisfactory hypothesis of manufacture are not inconsistent, and ignore the defect pair in tank structure and weld seam in RBI security evaluation The impact of storage tank safety.
In sum, lack storage tank detection and the safety evaluation method of architectonical at present in China, add storage tank peace Full evaluation criterion code disappearance, these situations are all that the security control of storage tank adds huge difficulty, and this is accomplished by passing through section Learn the existing detection technique of combing storage tank, with the failure mode of storage tank as foundation, distribute detection means rationally, explore science Storage tank detection and safety risk estimating method, it is achieved the safe condition quantitative evaluation of storage tank, establish for follow-up storage tank security control Fixed basis.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of online inspection of storage tank and appraisal procedure, device, to commenting Estimate grade reasonably adjust with result and revise, the more aobvious level of evaluation result and emphasis, decrease numerous hypothesis in assessment Irrationality with uncertain.
For solving above-mentioned technical problem, embodiments of the invention provide a kind of online inspection of storage tank and appraisal procedure, Comprise the steps:
(1) tank foundation information and safe condition collection of data: to storage tank specification, technological parameter, storage medium, design money The maintenance of material, acceptance report, construction note, all previous inspection record, history and transformation record, cycle patrol record, log, tank Body design and installation primitive technology paper trail is collected and arranges;
(2) tank body corrosion and leak detection and assessment, including:
(2-1) storage tank shell corrosion and stress mornitoring: the corrosion condition for tank skin mainly takes thickness measuring mode, uses super Sound calibrator detection storage tank shell thickness, to combine in design data storage tank shell minimum at tank skin actual (real) thickness and weldering riveting thick Degree, is estimated the safe condition of storage tank shell;
(2-2) storage tank bottom is corroded and leak detection online: in a state of use, storage tank bottom plate is carried out acoustic emission online Corrosion and leak detection, carry out grade classification and assessment;
(3) tank structure Detection of Stability and assessment, including:
(3-1) detection of storage tank tank deck is with assessment: according to the type of storage tank tank deck, carry out tank deck thickness measuring and visual examination, right The running status of storage tank tank deck is estimated;
(3-2) storage tank brittle fracture assessment: consider the situations such as process conditions change, tank body transformation, overload military service, according to storage The brittle fracture appraisal procedure of tank and flow process, be estimated the probability of storage tank generation brittle fracture;
(4) detection of tank body basis and assessment: regulation tank foundation detection content, method and safety status classification standard, knot Close the monitoring analysis to aspects such as tank foundation bulk settling, tank body deflections, the safe condition that tank body is basic is carried out grade and draws Divide and assessment;
(5) detection of storage tank affiliated facility is with assessment: include the detection of cofferdam validation checking and safety attachment, according to difference The corresponding inspection criterion of parts, specifies the safety status grade that affiliated facility is corresponding;
(6) storage tank general safety assessment: the risk Metrics in integrated risk appraisal procedure and the power entropy of every detection key element Relation, on the basis of existing evaluation method, in conjunction with China's storage tank design, manufacture and use in practical situation and detection data Safety classification result, improves storage tank security evaluation, it is achieved to storage tank multi-angle and storage tank safety status classification in all directions, from And corresponding maintenance management measure requirement is proposed targetedly.
Wherein, in step (2-1), at weldering riveting, the computational methods of storage tank shell minimum thickness are: consider storage tank shell The stress that weld seam exists is concentrated and installs defect problem present in manufacture, by magnetic memory detection technology in tank skin weld seam After stress concentration or Stress non-homogeneity position quickly position, ultrasonic phase array is used to carry out with upper bit defect that may be present Check and qualitative, quantitative, in conjunction with the welding quality assessment method in special equipment, provide foundation for tank skin safe condition classification.
Above-mentioned magnetic memory detection technology principle is: ferromagnetic material gradually accumulates in area of stress concentration dislocation, spontaneous leakage field The phenomenon of signal generation irreversible change, develops magnetic memory detection technology based on this, can not only in detection means The gross imperfection formed, and tiny microdefect and local region of stress concentration can also be made effective detection, for ferrum The assessment of magnetic material earlier damage provides analyzes foundation.)
Further, the welding quality assessment method in described special equipment includes the sides such as lack of penetration, slag inclusion, pore, crackle The detection program in face, security evaluation flow process and computational methods.
Wherein, in step (3-1), described storage tank tank deck is fixing top or floating roof.
Wherein, in step (4), it is stipulated that tank foundation detection content and method include from foundation elevation, outward appearance, draining, The many-sided detection that storage tank is carried out foundation construction quality of concrete quality, anticorrosion.
Wherein, in step (5), described safety attachment include cathode protection device, storage tank support member, structural member, guide pipe, Floating roof sealing member, platform stair and associated ping.
Wherein, in step (2-2), storage tank bottom corrode online with leak detection acoustic emission detection system include sensing Device, cable and computer, multiple described sensors are located at storage tank on tank bottoms tank skin, and described sensor passes through cable It is connected with computer, in described computer, is provided with Acoustic emission signal processing module and Analysis of Acoustic Emission Signal module, described calculating Machine is provided with display screen, and hot spot is located in storage tank bottom, described hot spot send, the acoustic emission signal warp of sensor acquisition Form corrosion signal after computer disposal, be shown on display screen.
Preferably, described sensor is built-in with preamplifier.
The embodiment of the present invention also provides for a kind of online inspection of storage tank and apparatus for evaluating, including stress collection in tank skin weld seam Middle positioner, storage tank shell calibrator, storage tank bottom are corroded and leak detection apparatus, tank deck calibrator, signal processing online Device, described signal processor includes signal transmitting and receiving module, signal analysis and processing module and display screen, stress in described tank skin weld seam Concentrate positioner, storage tank shell calibrator, storage tank bottom corrode online with leak detection apparatus, tank deck calibrator respectively with letter The electrical connection of number processor.
Wherein, in described tank skin weld seam, stress concentrates positioner to be stress concentration magnetic detector, and described storage tank shell is surveyed Thick instrument and tank deck calibrator are audigage, and it is acoustic emission detection that described storage tank bottom is corroded online with leak detection apparatus Device.
Further, described acoustic emission detection system includes that multiple sensor, multiple described sensors are located at storage tank adjacent to tank On the tank skin at the end, described sensor is connected with signal processor by cable, is provided with acoustic emission letter in described signal processor Number processing module and Analysis of Acoustic Emission Signal module, described storage tank tank bottoms on have hot spot, sent by described hot spot, sensed The acoustic emission signal that device gathers forms corrosion signal after signal processor processes, is shown on display screen.
Having the beneficial effect that of the technique scheme of the present invention: the present invention specify that storage tank detection method, detection project, Assessment content and appraisal procedure, on the one hand provide foundation for enterprise's storage tank safety management, and blind detection is reduced or avoided, and reduces storage Tank safety management cost, on the other hand provides safety supervision means for authorities, improves the efficiency of management and effect, reduces management Cost.By effective enforcement of the method, storage tank accident risk will be substantially reduced, reduce the economic loss that storage tank accident causes.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention;
Fig. 2 is the online inspection of storage tank of the present invention and the structured flowchart of apparatus for evaluating;
Fig. 3 is the structural representation of acoustic emission detection system of the present invention;
Fig. 4 is the schematic diagram of the corrosion signal that acoustic emission detection system of the present invention detection obtains;
Fig. 5 is the three-dimensional aerial view of storage tank in the embodiment of the present invention one;
The distribution schematic diagram of measuring point when Fig. 6 is that tank deck plate carries out in embodiment one thickness measuring;
Transducer arrangements schematic diagram when Fig. 7 is storage tank bottom plate acoustic emission detection in embodiment one;
Storage tank bottom plate acoustic emission detection location figure when Fig. 8 is storage tank bottom plate acoustic emission detection in embodiment one;
Storage tank bottom plate acoustic emission detection three-dimensional localization figure when Fig. 9 is storage tank bottom plate acoustic emission detection in embodiment one;
Position and defect distribution schematic diagram is detected when Figure 10 is storage tank shell weld seam Magnetic memory testing in embodiment one;
Magnetic field gradient dH/dx analysis chart at defect 1 when Figure 11 is storage tank shell weld seam Magnetic memory testing in embodiment one;
Magnetic field gradient dH/dx analysis chart at defect 2 when Figure 12 is storage tank shell weld seam Magnetic memory testing in embodiment one.
Description of reference numerals:
1, in tank skin weld seam, stress concentrates positioner;2, storage tank shell calibrator;3, storage tank bottom is corroded online and lets out Dew detection device;4, tank deck calibrator;5, signal processor;6, sensor;7, storage tank;8, cable;9, hot spot;10, aobvious Display screen.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool Body embodiment is described in detail.
As it is shown in figure 1, the present invention provides a kind of online inspection of storage tank and appraisal procedure, comprise the steps:
(1) tank foundation information and safe condition collection of data: to storage tank specification, technological parameter, storage medium, design money The maintenance of material, acceptance report, construction note, all previous inspection record, history and transformation record, cycle patrol record, log, tank Body design and installation primitive technology paper trail is collected and arranges;
(2) tank body corrosion and leak detection and assessment, including:
(2-1) storage tank shell corrosion and stress mornitoring: the corrosion condition for tank skin mainly takes thickness measuring mode, uses super Sound calibrator detection storage tank shell thickness, to combine in design data storage tank shell minimum at tank skin actual (real) thickness and weldering riveting thick Degree, according to " detection of API653 storage tank and maintenance ", is estimated the safe condition of storage tank shell;
Wherein, at weldering riveting, the computational methods of storage tank shell minimum thickness are: what the weld seam of consideration storage tank shell existed should Power is concentrated and installs defect problem present in manufacture, or is answered the stress concentration in tank skin weld seam by magnetic memory detection technology After the uneven position of power quickly positions, use ultrasonic phase array fixed with qualitative to checking with upper bit defect that may be present Amount, (includes the detection journey of the aspects such as lack of penetration, slag inclusion, pore, crackle in conjunction with the welding quality assessment method in special equipment Sequence, security evaluation flow process and computational methods), provide foundation for tank skin safe condition classification.
Above-mentioned magnetic memory detection technology principle is: ferromagnetic material gradually accumulates in area of stress concentration dislocation, spontaneous leakage field The phenomenon of signal generation irreversible change, develops magnetic memory detection technology based on this, can not only in detection means The gross imperfection formed, and tiny microdefect and local region of stress concentration can also be made effective detection, for ferrum The assessment of magnetic material earlier damage provides analyzes foundation.
(2-2) storage tank bottom is corroded and leak detection online: in a state of use, storage tank bottom plate is carried out acoustic emission online Corrosion and leak detection, then according to " JB/T10764 normal pressure metal tank acoustic emission detection and evaluation methodology " is to corroding and letting out Dew carries out grade classification and assessment;
When utilizing acoustic emission detection system to corrode storage tank bottom with leak detection online, keep tank level stable After several hours, by tank wall sensor by acoustic emission signal collection, and then utilize computer system and corresponding acoustic emission letter Number analyze software, according to JB/T10764-2007 " Non-Destructive Testing normal pressure metal tank acoustic emission detection and evaluation methodology ", to inspection The acoustic emission data collected in testing are analyzed, and tank bottoms domain for assessment is carried out safe condition ranking.
(3) tank structure Detection of Stability and assessment, including:
(3-1) detection of storage tank abhiseca is with assessment: according to the type of storage tank tank deck, carry out tank deck thickness measuring and visual examination, root According to API653, the running status of storage tank tank deck is estimated;
Wherein, storage tank tank deck can be divided into by type: fixing top and floating roof two kinds.
(3-2) storage tank brittle fracture assessment: consider the situations such as process conditions change, tank body transformation, overload military service, according to API653 is applicable to brittle fracture appraisal procedure and the flow process of storage tank current working, the probability to storage tank generation brittle fracture It is estimated.
(4) detection of tank body basis and assessment: regulation tank foundation detection content, method and safety status classification standard, knot Close the monitoring analysis to aspects such as tank foundation bulk settling, tank body deflections, the safe condition that tank body is basic is carried out grade and draws Divide and assessment;
Wherein, it is stipulated that tank foundation detection content and method include from foundation elevation, outward appearance, draining, concrete quality, The many-sided detection that storage tank is carried out foundation construction quality of anticorrosion.
(5) detection of storage tank affiliated facility is with assessment: include the detection of cofferdam validation checking and safety attachment, according to difference The corresponding inspection criterion of parts, specifies the safety status grade that affiliated facility is corresponding;
Wherein, described safety attachment includes cathode protection device, storage tank support member, structural member, guide pipe, floating roof sealing Part, platform stair and associated ping.
(6) storage tank general safety assessment: the risk Metrics in integrated risk appraisal procedure and the power entropy of every detection key element Relation, on the basis of the existing evaluation method based on API653 specification, in conjunction with China's storage tank design, manufacture and use Practical situation and detection data safety classification result, improve storage tank security evaluation, it is achieved to storage tank multi-angle and in all directions Storage tank safety status classification, thus corresponding maintenance management measure requirement is proposed targetedly.
The present invention also provides for a kind of online inspection of storage tank as shown in Figure 2 and apparatus for evaluating, including in tank skin weld seam Stress concentrates positioner 1, storage tank shell calibrator 2, storage tank bottom to corrode online and leak detection apparatus 3, tank deck calibrator 4, signal processor 5, described signal processor includes signal transmitting and receiving module, signal analysis and processing module and display screen, described tank In wall weld seam, stress concentrates positioner 1, storage tank shell calibrator 2, storage tank bottom to corrode online and leak detection apparatus 3, tank Top calibrator 4 electrically connects with signal processor 5 respectively.
Preferably, in described tank skin weld seam, stress concentrates positioner 1 to select stress concentration magnetic detector, described Tank Wall calibrator 2 and tank deck calibrator 4 all select audigage, described storage tank bottom to corrode online Acoustic emission detection system, described signal processor 5 is computer.
As it is shown on figure 3, described acoustic emission detection system includes multiple sensor 6, it is built-in with preamplifier.Multiple institutes Stating sensor 6 and be located at storage tank 7 on tank bottoms tank skin, described sensor 6 is connected with computer by cable 8, described meter Be provided with Acoustic emission signal processing module and Analysis of Acoustic Emission Signal module in calculation machine, described storage tank 7 tank bottoms on have hot spot 9, Sent by described hot spot 9, acoustic emission signal that sensor 6 gathers is through Acoustic emission signal processing module and Analysis of Acoustic Emission Signal Form corrosion signal (see Fig. 4) after resume module, be shown on display screen 10.
Technical scheme it is expanded on further below with specific embodiment:
Embodiment 1: utilize the first that granary A petro-chemical corporation is used by the online inspection of storage tank of the present invention and appraisal procedure Alcohol storage tank carries out on-line checking and assessment, and provides examining report.
Examining report catalogue such as following table:
1, hazardous chemical Dome roof tank complete examination conclusion report
2, storage tank outside macro-graph report
3, storage tank shell thickness measuring report
4, storage tank top board thickness measuring report
Wall thickness measures report
5, storage tank bottom plate acoustic emission detection report
6, storage tank shell weld seam Magnetic memory testing report
7, storage tank shell weld defect is ultrasonic reviews report
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art For, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, these improvements and modifications are also Should be regarded as protection scope of the present invention.

Claims (10)

1. the online inspection of storage tank and appraisal procedure, it is characterised in that comprise the steps:
(1) tank foundation information and safe condition collection of data: to storage tank specification, technological parameter, storage medium, design data, The maintenance of acceptance report, construction note, all previous inspection record, history and transformation record, cycle patrol record, log, tank body Design and installation primitive technology paper trail is collected and arranges;
(2) tank body corrosion and leak detection and assessment, including:
(2-1) storage tank shell corrosion and stress mornitoring: the corrosion condition for tank skin mainly takes thickness measuring mode, uses ultrasonic survey Thick instrument detection storage tank shell thickness, combine in design data storage tank shell minimum thickness at tank skin actual (real) thickness and weldering riveting, right The safe condition of storage tank shell is estimated;
(2-2) storage tank bottom is corroded and leak detection online: in a state of use, storage tank bottom plate is carried out acoustic emission and corrodes online With leak detection and assessment, carry out grade classification and assessment;
(3) tank structure Detection of Stability and assessment, including:
(3-1) detection of storage tank tank deck is with assessment: according to the type of storage tank tank deck, carry out tank deck thickness measuring and visual examination, to storage tank The running status of tank deck is estimated;
(3-2) storage tank brittle fracture assessment: consider the situations such as process conditions change, tank body transformation, overload military service, according to storage tank Brittle fracture appraisal procedure and flow process, be estimated the probability of storage tank generation brittle fracture;
(4) detection of tank body basis and assessment: regulation tank foundation detection content, method and safety status classification standard, in conjunction with right The monitoring analysis of the aspects such as tank foundation bulk settling, tank body deflection, to tank body basis safe condition carry out grade classification and Assessment;
(5) detection of storage tank affiliated facility is with assessment: include the detection of cofferdam validation checking and safety attachment, according to different parts Corresponding inspection criterion, specifies the safety status grade that affiliated facility is corresponding;
(6) storage tank general safety assessment: the risk Metrics in integrated risk appraisal procedure and the power entropy relation of every detection key element, On the basis of existing evaluation method, in conjunction with China's storage tank design, manufacture and use in practical situation and detection data safety Classification results, improves storage tank security evaluation, it is achieved to storage tank multi-angle and storage tank safety status classification in all directions, thus have Corresponding maintenance management measure requirement is proposed targetedly.
The online inspection of storage tank the most according to claim 1 and appraisal procedure, it is characterised in that in step (2-1), weldering At riveting, the computational methods of storage tank shell minimum thickness are: consider that the stress that the weld seam of storage tank shell exists is concentrated and installed and manufacture Present in defect problem, by magnetic memory detection technology in tank skin weld seam stress concentrate or Stress non-homogeneity position quick Behind location, ultrasonic phase array is used to check and qualitative, quantitative, in conjunction with special equipment with upper bit defect that may be present In welding quality assessment method, for tank skin safe condition classification provide foundation.
The online inspection of storage tank the most according to claim 2 and appraisal procedure, it is characterised in that in described special equipment Welding quality assessment method include detection program, security evaluation flow process and the calculating in terms of lack of penetration, slag inclusion, pore, crackle Method.
The online inspection of storage tank the most according to claim 1 and appraisal procedure, it is characterised in that in step (3-1), institute State storage tank tank deck for fixing top or floating roof.
The online inspection of storage tank the most according to claim 1 and appraisal procedure, it is characterised in that in step (4), it is stipulated that Tank foundation detection content and method include from foundation elevation, outward appearance, draining, concrete quality, anticorrosion many-sided to storage tank Carry out the detection of foundation construction quality.
The online inspection of storage tank the most according to claim 1 and appraisal procedure, it is characterised in that in step (5), described Safety attachment includes cathode protection device, storage tank support member, structural member, guide pipe, floating roof sealing member, platform stair and attachment tube Road.
The online inspection of storage tank the most according to claim 1 and appraisal procedure, it is characterised in that in step (2-2), storage The tank bottoms online corrosion of tank and leak detection acoustic emission detection system include sensor, cable and computer, multiple described biographies Sensor is located at storage tank on tank bottoms tank skin, and described sensor is connected with computer by cable, sets in described computer Acoustic emission signal processing module and Analysis of Acoustic Emission Signal module, described computer is provided with display screen, and storage is located in hot spot On tank is tank bottoms, described hot spot send, the acoustic emission signal of sensor acquisition forms corrosion signal after computer processes, aobvious It is shown on display screen;Described sensor is built-in with preamplifier.
8. the online inspection of storage tank and apparatus for evaluating, it is characterised in that include that in tank skin weld seam, stress concentrates location dress Put, storage tank shell calibrator, storage tank bottom are corroded and leak detection apparatus, tank deck calibrator, signal processor online, described letter Number processor includes signal transmitting and receiving module, signal analysis and processing module and display screen, and in described tank skin weld seam, stress concentrates location Device, storage tank shell calibrator, storage tank bottom corrode online with leak detection apparatus, tank deck calibrator respectively with signal processor Electrical connection.
The online inspection of storage tank the most according to claim 8 and apparatus for evaluating, it is characterised in that in described tank skin weld seam Stress concentrates positioner to be stress concentration magnetic detector, and described storage tank shell calibrator and tank deck calibrator are ultrasonic thickness measurement Instrument, it is acoustic emission detection system that described storage tank bottom is corroded online with leak detection apparatus.
The online inspection of storage tank the most according to claim 9 and apparatus for evaluating, it is characterised in that described acoustic emission is examined Surveying device and include that multiple sensor, multiple described sensors are located at storage tank on tank bottoms tank skin, described sensor is by electricity Cable is connected with signal processor, is provided with Acoustic emission signal processing module and Analysis of Acoustic Emission Signal mould in described signal processor Block, described storage tank tank bottoms on have hot spot, described hot spot send, the acoustic emission signal of sensor acquisition is through signal processing Device forms corrosion signal after processing, be shown on display screen.
CN201610963564.4A 2016-11-04 2016-11-04 Online detection of storage tank, assessment method and device Pending CN106323385A (en)

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