CN106053524A - Method for identifying short-term overheating of furnace pipe - Google Patents
Method for identifying short-term overheating of furnace pipe Download PDFInfo
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- CN106053524A CN106053524A CN201610511061.3A CN201610511061A CN106053524A CN 106053524 A CN106053524 A CN 106053524A CN 201610511061 A CN201610511061 A CN 201610511061A CN 106053524 A CN106053524 A CN 106053524A
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- boiler tube
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- 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
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- 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
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a method for identifying the short-term overheating of a furnace pipe. The method can comprise the following steps: measuring the inner pipe diameter and outer pipe diameter of a to-be-measured furnace pipe; respectively comparing the change of difference between the measured inner pipe diameter and the standard inner pipe diameter and between the measured outer pipe diameter and the standard outer pipe diameter, and detecting the relative amount of a ferritic phase and an austenite phase of the to-be-measured furnace pipe if the change of difference is not lower than a preset difference; if the measurement result only has the austenite phase, determining the to-be-measured furnace pipe as long-term overheating; and if both the ferritic phase and the austenite phase exist, determining the to-be-measured furnace pipe as short-term overheating. According to the method for identifying the short-term overheating of the furnace pipe, the short-term overheating phenomenon of the furnace pipe can be identified, so that the problems of damage to the furnace pipe and abnormal operation of equipment caused due to the short-term overheating can be solved.
Description
Technical field
The present invention relates to boiler tube detection field, a kind of method particularly relating to identification boiler tube short term superheating.
Background technology
In thermal power plant, the safe and stable operation of generator tube, direct and generating set safe and stable operation has directly
Connecing relation, in thermal power plant once there is short term superheating phenomenon it is necessary to take the measures such as blowing out to rush to repair in generator tube, this
Have a strong impact on the normal production in thermal power plant, cause huge economic loss, and generator tube damages and is frequently due to short-term
The overheated consequence caused, i.e. boiler tube short term superheating cause boiler tube generation plastic deformation, and serious also results in boiler tube generation explosion.
Currently for generator tube short term superheating aspect, there is no effective discrimination method, major part is quick-fried to having occurred and that
The aspects such as the boiler tube of pipe carries out some remedial measures or the analysis of causes, manages from supervision, standardized operation operation are set about, it is impossible to
Fundamentally identification boiler tube short term superheating, it is therefore desirable to provide a kind of can the method for identification boiler tube short term superheating, with solution never
Energy identification boiler tube short term superheating, the problem that the coil damage caused and equipment are not normally functioning.
Summary of the invention
A kind of method that it is an object of the invention to provide identification boiler tube short term superheating, to solve what above-mentioned prior art existed
Problem, makes boiler tube short term superheating phenomenon obtain identification, thus solves the coil damage that causes due to boiler tube short term superheating and set
The standby problem being not normally functioning.
For achieving the above object, the invention provides following scheme: the application provides a kind of identification boiler tube short term superheating
Method, including:
Interior caliber and outer tube diameter to boiler tube to be measured measure；
It is respectively compared the difference change measuring the said inner tube footpath obtained and outer tube diameter with caliber in standard and standard outer tube diameter
Changing, if the change of described difference is not less than preset difference value, then the ferritic phase detecting described boiler tube to be measured is relative with austenite phase
Amount；
Austenite phase as described in only have in testing result, it is determined that described boiler tube to be measured is long-term overheat；As having simultaneously
There are described ferritic phase and described austenite phase, it is determined that described boiler tube to be measured is short term superheating.
Preferably, the measurement carried out boiler tube to be measured can also include extension situation and the contraction of the tube wall to boiler tube to be measured
Deformation detects, and extension situation and contraction distortion situation according to detection are preset with extension predetermined threshold value and contraction respectively
The comparison of threshold value determines the difference change of described boiler tube to be measured and standard boiler tube.
Preferably, described boiler tube to be measured is the boiler tube that booster does not occurs.
Preferably, also include carrying out detecting ferritic phase and the relative quantity of martensitic phase to the boiler tube that explosion occurs；According to
Detect the ferritic phase and the relative quantity of martensitic phase obtained, determine gold during boiler tube generation explosion in conjunction with ferrum-Carbon balance phasor
Belong to temperature.
Preferably, martensitic phase as described in only have in testing result, it is determined that the boiler tube of described generation explosion is long-term
The overheated explosion caused；As described in have simultaneously ferritic phase and as described in martensitic phase, it is determined that state occur explosion boiler tube be
The explosion that short term superheating causes.
The specific embodiment provided according to the present invention, the invention discloses techniques below effect: the one that the present invention provides
By being respectively compared the measurement of caliber and outer tube diameter and caliber in standard in boiler tube to be measured in the method for identification boiler tube short term superheating
Change or by being respectively compared extension situation and the contraction distortion situation of the tube wall of boiler tube to be measured with the difference of standard outer tube diameter
Determine whether the ferritic phase in boiler tube and austenite phase with the difference change extending predetermined threshold value and contraction predetermined threshold value
Relative quantity detect, by detection boiler tube in ferritic phase and the relative quantity of austenite phase, if testing result only has
There is austenite phase, it is determined that boiler tube to be measured is in long-term overheat state；If testing result has ferritic phase and Austria simultaneously
Family name's body phase, it is determined that boiler tube to be measured is in short term superheating state, so that boiler tube short term superheating phenomenon obtains identification, thus solves
The problem that the coil damage caused due to boiler tube short term superheating phenomenon and equipment are not normally functioning.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment
It is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under not making creative work premise, broadly falls into the model of present invention protection
Enclose.
A kind of method that it is an object of the invention to provide identification boiler tube short term superheating, to solve what above-mentioned prior art existed
Problem, makes boiler tube short term superheating phenomenon obtain identification, thus solves the coil damage that causes due to boiler tube short term superheating and set
The standby problem being not normally functioning.
Understandable, below in conjunction with detailed description of the invention for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from
The present invention is further detailed explanation.
The application provides a kind of method of identification boiler tube short term superheating, including:
Interior caliber and outer tube diameter to boiler tube to be measured measure；
It is respectively compared the difference change measuring the said inner tube footpath obtained and outer tube diameter with caliber in standard and standard outer tube diameter
Changing, if the change of described difference is not less than preset difference value, then the ferritic phase detecting described boiler tube to be measured is relative with austenite phase
Amount；
Austenite phase as described in only have in testing result, it is determined that described boiler tube to be measured is long-term overheat；As having simultaneously
There are described ferritic phase and described austenite phase, it is determined that described boiler tube to be measured is short term superheating.
Wherein, boiler tube caliber of boiler tube during short term superheating can present the change of obvious difference, and difference change occurs
The boiler tube at place can produce tube wall phenomenon that is thinning and that locally heave (boiler tube explosion occurs further), this is because at higher temperature
Lower intensity can weaken.The standard microscopic structure of boiler tube contains ferritic phase and pearlite phase, reaches lower limit at furnace tube temperature critical
Time more than temperature (AC1), ferrite is changed into austenite by starting, and when arriving upper critical temperature (AC3), is completely transformed into
Austenite.
As one preferred embodiment, the measurement carried out boiler tube to be measured can also include the tube wall to boiler tube to be measured
Extension situation and contraction distortion situation detect, according to the extension situation of detection and contraction distortion situation respectively with extend pre-
If the comparison of threshold value and contraction predetermined threshold value determines the difference change of described boiler tube to be measured and standard boiler tube.
Wherein, boiler tube can present significantly extension and contraction distortion during short term superheating on the tube wall of boiler tube.
As one preferred embodiment, described boiler tube to be measured is the boiler tube that booster does not occurs.
As one preferred embodiment, also include carrying out detecting ferritic phase and martensite to the boiler tube that explosion occurs
The relative quantity of phase；The ferritic phase obtained according to detection and the relative quantity of martensitic phase, determine boiler tube in conjunction with ferrum-Carbon balance phasor
There is metal temperature during explosion.
Wherein, containing ferritic phase and pearlite phase, ferrite in the standard microscopic structure of described boiler tube Steel material to be measured
When starting to be changed into austenite phase mutually, described boiler tube overtemperature reaches lower limit critical temperature；Ferritic phase is completely transformed into Ovshinsky
Described in body phase time, boiler tube overtemperature reaches upper critical temperature；When furnace tube temperature exceedes upper critical temperature (AC3), boiler tube
Blasting phenomena can occur, when boiler tube explosion, necessarily transfer quick refrigeration immediately to, during quick refrigeration, austenite will change
For martensite.
As one preferred embodiment, martensitic phase as described in only have in testing result, it is determined that described generation
The boiler tube of explosion is the explosion that long-term overheat causes；As described in have simultaneously ferritic phase and as described in martensitic phase, it is determined that state
The boiler tube that explosion occurs is the explosion that short term superheating causes.
Wherein, testing result only has ferrite that martensitic phase then illustrated in boiler tube before boiler tube generation explosion
It is completely converted into austenite, say, that occur the boiler tube of explosion to be in long-term overheat state, occurs the boiler tube of explosion to occur quick-fried
Broken reason is the explosion that long-term overheat causes；Testing result has described ferritic phase simultaneously and described martensitic phase is then said
Bright ferrite before boiler tube generation explosion in boiler tube is not completely converted into austenite, is i.e. in ferrite and austenite coexists
State, when being in this state, furnace tube temperature is between lower limit critical temperature (AC1) and upper critical temperature (AC3).
Principle and the embodiment of the present invention are set forth by specific case used herein, saying of above example
Bright method and the core concept thereof being only intended to help to understand the present invention；Simultaneously for one of ordinary skill in the art, foundation
The thought of the present invention, the most all will change.In sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (5)
1. the method for an identification boiler tube short term superheating, it is characterised in that including:
Interior caliber and outer tube diameter to boiler tube to be measured measure；
It is respectively compared the difference change measuring the said inner tube footpath obtained and outer tube diameter with caliber in standard and standard outer tube diameter, if
The change of described difference is not less than preset difference value, then detect ferritic phase and the relative quantity of austenite phase of described boiler tube to be measured；
Austenite phase as described in only have in testing result, it is determined that described boiler tube to be measured is long-term overheat；As having institute simultaneously
State ferritic phase and described austenite phase, it is determined that described boiler tube to be measured is short term superheating.
The method of a kind of identification boiler tube short term superheating the most according to claim 1, it is characterised in that boiler tube to be measured is carried out
Measurement can also include that the extension situation of tube wall to boiler tube to be measured and contraction distortion situation detect, according to prolonging of detection
Stretch situation and contraction distortion situation respectively with extend predetermined threshold value and shrink predetermined threshold value relatively determine described boiler tube to be measured and
The difference change of standard boiler tube.
The method of a kind of identification boiler tube short term superheating the most according to claim 1, it is characterised in that described boiler tube to be measured is
There is not the boiler tube of booster.
The method of a kind of identification boiler tube short term superheating the most according to claim 1, it is characterised in that also include occurring quick-fried
Broken boiler tube carries out detecting ferritic phase and the relative quantity of martensitic phase；According to the ferritic phase that obtains of detection and martensitic phase
Relative quantity, determines metal temperature during boiler tube generation explosion in conjunction with ferrum-Carbon balance phasor.
The method of a kind of identification boiler tube short term superheating the most according to claim 4, it is characterised in that as in testing result only
There is described martensitic phase, it is determined that the boiler tube of described generation explosion is the explosion that long-term overheat causes；As described in have simultaneously
Ferritic phase and described martensitic phase, it is determined that the boiler tube stating generation explosion is the explosion that short term superheating causes.
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 true CN106053524A (en) | 2016-10-26 |
| CN106053524B CN106053524B (en) | 2019-09-10 |
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| 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 |
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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 |
|---|
| 殷尊: "超临界1000MW机组锅炉水冷壁爆管原因分析", 《热力发电》 * |
| 苏宣机: "某企业锅炉水冷壁爆管原因分析", 《质量技术监督研究》 * |
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| CN106053524B (en) | 2019-09-10 |
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