CN106053524B - A method of identification boiler tube short term superheating - Google Patents
A method of identification boiler tube short term superheating Download PDFInfo
- Publication number
- CN106053524B CN106053524B CN201610511061.3A CN201610511061A CN106053524B CN 106053524 B CN106053524 B CN 106053524B CN 201610511061 A CN201610511061 A CN 201610511061A CN 106053524 B CN106053524 B CN 106053524B
- Authority
- CN
- China
- Prior art keywords
- boiler tube
- short term
- phase
- measured
- superheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/72—Investigating presence of flaws
Abstract
The present invention discloses a kind of method for recognizing boiler tube short term superheating, may include: to measure to the interior caliber and outer tube diameter of boiler tube to be measured；It is respectively compared the difference of caliber and standard outer tube diameter in the said inner tube diameter and outer tube diameter and standard that measurement obtains to change, if difference variation is not less than preset difference value, detects the ferritic phase of the boiler tube to be measured and the relative quantity of austenite phase；As only having the austenite phase in testing result, it is determined that the boiler tube to be measured is long-term overheat；Ferritic phase and the austenite phase as described in having simultaneously, it is determined that the boiler tube to be measured is short term superheating.A kind of method recognizing boiler tube short term superheating provided by the invention, recognizes boiler tube short term superheating phenomenon, to solve the problems, such as that the coil damage as caused by boiler tube short term superheating and equipment are not normally functioning.
Description
Technical field
The present invention relates to boiler tube detection fields, more particularly to a kind of method for recognizing boiler tube short term superheating.
Background technique
In thermal power plant, the safe and stable operation of generator tube directly has directly with the safe and stable operation of generating set
Connect relationship, in thermal power plant generator tube once occur short term superheating phenomenon it is necessary to take the measures such as blowing out to be repaired, this
The normal production for seriously affecting thermal power plant causes huge economic loss, and generator tube damage is frequently due in short term
Consequence caused by overheat, i.e. boiler tube short term superheating cause boiler tube to be plastically deformed, and explosion occurs for the serious boiler tube that also results in.
At present in terms of generator tube short term superheating, effective discrimination method is had no, is largely quick-fried to having occurred and that
The boiler tube of pipe carries out some remedial measures or the analysis of causes, and from supervision management, standardized operation operation etc. is set about, can not
Fundamentally recognize boiler tube short term superheating, it is therefore desirable to provide a kind of method that can recognize boiler tube short term superheating, never with solution
Boiler tube short term superheating can be recognized, the problem of caused coil damage and equipment are not normally functioning.
Summary of the invention
It is above-mentioned of the existing technology to solve the object of the present invention is to provide a kind of method for recognizing boiler tube short term superheating
Problem recognizes boiler tube short term superheating phenomenon, to solve the coil damage as caused by boiler tube short term superheating and set
Standby the problem of being not normally functioning.
To achieve the above object, the present invention provides following schemes: the application provides a kind of identification boiler tube short term superheating
Method, comprising:
The interior caliber and outer tube diameter of boiler tube to be measured are measured；
The difference of caliber and standard outer tube diameter in the said inner tube diameter and outer tube diameter and standard that measurement obtains is respectively compared to become
Change, if the difference changes the opposite of the ferritic phase and austenite phase for detecting the boiler tube to be measured not less than preset difference value
Amount；
As only having the austenite phase in testing result, it is determined that the boiler tube to be measured is long-term overheat；As having simultaneously
There are the ferritic phase and the austenite phase, it is determined that the boiler tube to be measured is short term superheating.
Preferably, the measurement carried out to boiler tube to be measured can also include to the extension situation of the tube wall of boiler tube to be measured and contraction
Deformation is detected, default with extension preset threshold and contraction respectively according to the extension situation of detection and contraction distortion situation
The comparison of threshold value determines that the difference of the boiler tube to be measured and standard boiler tube changes.
Preferably, the boiler tube to be measured is the boiler tube that booster does not occur.
It preferably, further include the relative quantity that detection ferritic phase and martensitic phase is carried out to the boiler tube that explosion occurs；According to
The relative quantity for detecting obtained ferritic phase and martensitic phase, gold when determining that explosion occurs for boiler tube in conjunction with iron-Carbon balance phasor
Belong to temperature.
Preferably, as only having the martensitic phase in testing result, it is determined that the boiler tube that explosion occurs is long-term
Explosion caused by overheating；Having ferritic phase and the martensitic phase simultaneously, it is determined that the boiler tube for stating generation explosion is
Explosion caused by short term superheating.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: one kind provided by the invention
It recognizes in the method for boiler tube short term superheating by being respectively compared in boiler tube to be measured caliber in the measurement and standard of caliber and outer tube diameter
With the difference variation of standard outer tube diameter or the extension situation and contraction distortion situation of the tube wall by being respectively compared boiler tube to be measured
Determine whether with extending preset threshold and shrinking the difference variation of preset threshold to the ferritic phase and austenite phase in boiler tube
Relative quantity detected, by detection boiler tube in ferritic phase and austenite phase relative quantity, if only had in testing result
There is austenite phase, it is determined that boiler tube to be measured is in long-term overheat state；If having ferritic phase and Austria in testing result simultaneously
Family name's body phase, it is determined that boiler tube to be measured is in short term superheating state, to make boiler tube short term superheating phenomenon be recognized, to solve
The problem of as caused by boiler tube short term superheating phenomenon coil damage and equipment are not normally functioning.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
It is above-mentioned of the existing technology to solve the object of the present invention is to provide a kind of method for recognizing boiler tube short term superheating
Problem recognizes boiler tube short term superheating phenomenon, to solve the coil damage as caused by boiler tube short term superheating and set
Standby the problem of being not normally functioning.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment
The present invention is described in further detail.
The application provides a kind of method for recognizing boiler tube short term superheating, comprising:
The interior caliber and outer tube diameter of boiler tube to be measured are measured；
The difference of caliber and standard outer tube diameter in the said inner tube diameter and outer tube diameter and standard that measurement obtains is respectively compared to become
Change, if the difference changes the opposite of the ferritic phase and austenite phase for detecting the boiler tube to be measured not less than preset difference value
Amount；
As only having the austenite phase in testing result, it is determined that the boiler tube to be measured is long-term overheat；As having simultaneously
There are the ferritic phase and the austenite phase, it is determined that the boiler tube to be measured is short term superheating.
Wherein, apparent difference variation can be presented in the caliber of boiler tube boiler tube during short term superheating, and difference variation occurs
The boiler tube at place can generate the phenomenon that tube wall is thinning and part is heaved (explosion of further occurrence boiler tube), this is because in higher temperature
Lower intensity can weaken.The standard microscopic structure of boiler tube contains ferritic phase and pearlite phase, and it is critical to reach lower limit in furnace tube temperature
When more than temperature (AC1), ferrite will start to be changed into austenite, when reaching upper critical temperature (AC3), be completely transformed into
Austenite.
As a preferred embodiment, the measurement carried out to boiler tube to be measured can also include the tube wall to boiler tube to be measured
Extension situation and contraction distortion situation detected, according to the extension situation of detection and contraction distortion situation respectively with extend it is pre-
If threshold value and the comparison for shrinking preset threshold determine that the difference of the boiler tube to be measured and standard boiler tube changes.
Wherein, apparent extension and contraction distortion can be presented in boiler tube during short term superheating on the tube wall of boiler tube.
As a preferred embodiment, the boiler tube to be measured is the boiler tube that booster does not occur.
As a preferred embodiment, further including carrying out detection ferritic phase and martensite to the boiler tube that explosion occurs
The relative quantity of phase；According to the relative quantity of ferritic phase and martensitic phase that detection obtains, boiler tube is determined in conjunction with iron-Carbon balance phasor
Metal temperature when explosion occurs.
Wherein, ferritic phase and pearlite phase, ferrite are contained in the standard microscopic structure of the boiler tube Steel material to be measured
The boiler tube overtemperature reaches lower limit critical-temperature when mutually starting to be changed into austenite phase；Ferritic phase is completely transformed into Ovshinsky
The boiler tube overtemperature reaches upper critical temperature when body phase；When furnace tube temperature is more than upper critical temperature (AC3), boiler tube
Blasting phenomena can occur, inevitable to switch to quick refrigeration immediately when boiler tube explosion, austenite will change during quick refrigeration
For martensite.
As a preferred embodiment, as only having the martensitic phase in testing result, it is determined that the generation
The boiler tube of explosion is explosion caused by long-term overheat；Ferritic phase and the martensitic phase as described in having simultaneously, it is determined that state
The boiler tube that explosion occurs is explosion caused by short term superheating.
Wherein, only the ferrite before explosion occurs for boiler tube in boiler tube has then been illustrated with martensitic phase in testing result
It is completely converted into austenite, that is to say, that the boiler tube that explosion occurs is in long-term overheat state, and the boiler tube generation that explosion occurs is quick-fried
Broken reason is explosion caused by long-term overheat；Simultaneously there is the ferritic phase and the martensitic phase then to say in testing result
The bright ferrite before explosion occurs for boiler tube in boiler tube is not completely converted into austenite, i.e., coexists in ferrite and austenite
State, be in this state when furnace tube temperature between lower limit critical-temperature (AC1) and upper critical temperature (AC3).
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (3)
1. a kind of method for recognizing boiler tube short term superheating characterized by comprising
The extension situation and contraction distortion situation of the tube wall of boiler tube to be measured are detected, according to the extension situation of detection and contraction
Deformation determines the difference of the boiler tube to be measured and standard boiler tube compared with extending preset threshold and shrinking preset threshold respectively
Value variation；
If the difference changes the opposite of the ferritic phase and austenite phase for detecting the boiler tube to be measured not less than preset difference value
Amount；
As only having the austenite phase in testing result, it is determined that the boiler tube to be measured is long-term overheat；As having institute simultaneously
State ferritic phase and the austenite phase, it is determined that the boiler tube to be measured is short term superheating；
The boiler tube to be measured is the boiler tube that booster does not occur.
2. a kind of method for recognizing boiler tube short term superheating according to claim 1, which is characterized in that further include quick-fried to occurring
Broken boiler tube carries out the relative quantity of detection ferritic phase and martensitic phase；According to the obtained ferritic phase of detection and martensitic phase
Relative quantity, metal temperature when determining that explosion occurs for boiler tube in conjunction with iron-Carbon balance phasor.
3. it is according to claim 2 it is a kind of recognize boiler tube short term superheating method, which is characterized in that as in testing result only
With the martensitic phase, it is determined that the boiler tube that explosion occurs is explosion caused by long-term overheat；As described in having simultaneously
Ferritic phase and the martensitic phase, it is determined that the boiler tube for stating generation explosion is explosion caused by short term superheating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511061.3A CN106053524B (en) | 2016-07-01 | 2016-07-01 | A method of identification boiler tube short term superheating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610511061.3A CN106053524B (en) | 2016-07-01 | 2016-07-01 | A method of identification boiler tube short term superheating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106053524A CN106053524A (en) | 2016-10-26 |
| CN106053524B true CN106053524B (en) | 2019-09-10 |
Family
ID=57201609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610511061.3A Active CN106053524B (en) | 2016-07-01 | 2016-07-01 | A method of identification boiler tube short term superheating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106053524B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444885A (en) * | 2011-12-19 | 2012-05-09 | 上海望特能源科技有限公司 | Method for avoiding overheat tube burst in tubular boiler of power station boiler |
-
2016
- 2016-07-01 CN CN201610511061.3A patent/CN106053524B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102444885A (en) * | 2011-12-19 | 2012-05-09 | 上海望特能源科技有限公司 | Method for avoiding overheat tube burst in tubular boiler of power station boiler |
Non-Patent Citations (2)
| Title |
|---|
| 某企业锅炉水冷壁爆管原因分析;苏宣机;《质量技术监督研究》;20130630(第6期);第28-30页 |
| 超临界1000MW机组锅炉水冷壁爆管原因分析;殷尊;《热力发电》;20130731;第42卷(第7期);第92-96页 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106053524A (en) | 2016-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104694716B (en) | A kind of pipeline welding heat treatment Frequency Induction Heating technique and device | |
| CN106053524B (en) | A method of identification boiler tube short term superheating | |
| Barrett et al. | Thermomechanical fatigue in 9-12Cr steels: Life prediction models and the effect of tensile dwell periods | |
| CN104428618A (en) | Method and device for detecting a leakage in the area of at least one cooling device of a furnace, and a furnace | |
| CN109524136B (en) | Device and method for testing high-energy tube fracture whipping behavior | |
| CN114279944B (en) | Method for evaluating coupling effect of heat aging, stress and corrosion of stainless steel welding material | |
| Hur et al. | Effect of shot peening on primary water stress corrosion cracking of Alloy 600 steam generator tubes in an operating PWR plant | |
| Brett | The impression creep Monkman Grant relationship | |
| CN102445335B (en) | Pressure detecting method for electric pressure cooker | |
| CN102735449B (en) | Method for detecting influence of reheated attemperating water provided by center tap of feeding pump on performance of unit | |
| Lee et al. | Evaluation of plugging criteria on steam generator tubes and coalescence model of collinear axial through-wall cracks | |
| Hur et al. | Discrimination method of through-wall cracks in steam generator tubes using eddy current signals | |
| Liu et al. | Effect of Bending Load on Burst Pressure of Nuclear Power Plant Steam Generator Tubes With Uniform Wall Thinning | |
| Yue et al. | Material and Dynamics Analysis of Low-Temperature Superheater Pipe Bulging Accident in Utility Boiler | |
| Chirigos et al. | Influence of material property variations on the assessment of structural integrity of nuclear components | |
| Korolev et al. | The properties of WWER-440 type reactor pressure vessel steels cut out from operated units | |
| Feng et al. | Margins Assessment of Pressure-Temperature Limit Curves for a RPV | |
| Kontorovich et al. | Calculation of low-cycle fatigue in accordance with the national standard and strength codes | |
| Jiang et al. | Acoustic emission testing on aluminum alloy pressure vessels | |
| Kim et al. | Performance Test for Developing the Acoustic Leak Detection System of the LMR Steam Generator | |
| Ogawa et al. | Leak-before-break and plastic collapse strength evaluation of stainless steel piping with a part-through notch | |
| Daniel et al. | Very High Cycle Fatigue (VHCF) behavior of austenitc stainless steels and their welds for reactor internals at ambient and operating relevant temperature | |
| CN105260950A (en) | Failure control method for oil and gas pipelines | |
| Hu et al. | Critical Strain for the Initiation of Dynamic Recrystallization in a Fe-Cr-Ni Super Austenitic Stainless Steel | |
| Yada et al. | Comparison Between Fracture Mechanics Evaluation Methods in ASME Boiler & Pressure Vessel Code, Section XI and Those in JSME Leak-Before-Break Evaluation Guidelines for Sodium-Cooled Fast Reactors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |