CN106224931B - The determination methods of the built-in waste heat boiler water leakage of sintering machine large flue - Google Patents
The determination methods of the built-in waste heat boiler water leakage of sintering machine large flue Download PDFInfo
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- CN106224931B CN106224931B CN201610648667.1A CN201610648667A CN106224931B CN 106224931 B CN106224931 B CN 106224931B CN 201610648667 A CN201610648667 A CN 201610648667A CN 106224931 B CN106224931 B CN 106224931B
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- sintering machine
- large flue
- machine large
- temperature value
- lower wall
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
- F22B37/421—Arrangements for detecting leaks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Thermal Sciences (AREA)
- General Physics & Mathematics (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of determination methods of sintering machine large flue built-in waste heat boiler water leakage, this method mainly gathers after every group of heat exchanger on sintering machine large flue temperature value data message in lower wall in real time by collecting unit；By temperature value data information transfer in the upper lower wall collected to data processing unit, temperature value in temperature value in sintering machine large flue upper wall per second and sintering machine large flue lower wall per second is added up respectively using set time unit as interval, difference is asked to obtain on sintering machine large flue temperature value difference in lower wall, and calculate on sintering machine large flue temperature value deviation increasing value in lower wall, the variation tendency that observer passes through temperature value deviation in lower wall on display unit Real Time Observation sintering machine large flue, and then whether energy accurate judgement waste heat boiler water leaks, effectively reduce contingency occurrence probability.Heat exchanger leakage can be made to judge time advance at least more than 2 hours, heat exchanger is handled it in time when leaking, so as to ensure the stability of production.
Description
Technical field
The invention belongs to the built-in large flue waste heat boiler technical field of sintering machine, more particularly to a kind of sintering machine large flue
The determination methods of built-in waste heat boiler water leakage.
Background technology
Sintering machine large flue heat recovery technology is divided into two kinds of external waste heat boiler and built-in waste heat boiler, wherein with
Built-in organic efficiency highest.But the construction principal element for influenceing built-in waste heat boiler is that steel mill worries once built-in remaining
Heat boiler produces leakage, and operations staff can not have found leakage situation in time, it is impossible to timely and effectively handle, cause tail flue gas to contain
Water, influence the safe operation of postorder production technology and equipment.Current equipment is not equipped with heat exchange unit leak detecting device.And
When leakage rate is smaller, feedwater makes feedwater flow be varied less with steam flow deviation, and often because the error of flow measurement
And it can not judge.Therefore a kind of new measuring method is invented, judges that heat exchange unit leaks and carries out timely processing in advance, for
Prevent heat exchange unit leakage from expanding or reducing causality loss and having very big realistic meaning.
The content of the invention
It is an object of the invention to provide one kind, simply, efficiently, accurately and rapidly remote detection is detected more than sintering machine large flue
The method of heat boiler water leakage, so as to judge that heat exchange unit leaks and carries out timely processing in advance, for preventing heat exchange unit
Leakage expands or reduced causality loss.
To solve technical problem existing for prior art, the technical solution adopted by the present invention is：
A kind of determination methods of the built-in waste heat boiler water leakage of sintering machine large flue of the present invention, it is characterised in that bag
Include following steps：
A. gather after every group of heat exchanger that temperature value and sintering machine are big in sintering machine large flue upper wall in real time by collecting unit
Temperature value data message in flue lower wall；
B. temperature Value Data in temperature value in the sintering machine large flue upper wall collected and sintering machine large flue lower wall is believed
Breath is delivered to data processing unit, is handled to obtain temperature value in current sintering machine large flue upper wall per second by data processing unit
With temperature value in sintering machine large flue lower wall per second；
C. by temperature value in temperature value in sintering machine large flue upper wall per second and sintering machine large flue lower wall per second with fixation
Chronomere is added up respectively for interval, under temperature value and sintering machine large flue in the sintering machine large flue upper wall after adding up
Temperature value asks difference to obtain on sintering machine large flue temperature value difference in lower wall in wall, and by the sintering machine large flue in lower wall
Temperature value Difference Storage is in the memory unit；
D. the sintering machine opium that temperature value difference obtains with previous time series in real time in lower wall on sintering machine large flue
Temperature value difference seeks difference in lower wall on road, temperature value deviation in lower wall is obtained on sintering machine large flue, by sintering machine opium
Temperature value deviation feeds back to observer by display unit in lower wall on road；
E. on observer's Real Time Observation sintering machine large flue in lower wall temperature value deviation variation tendency, if difference is dashed forward
Rise and continue to increase, then judge that the previous heat exchanger of measuring point leaks, if difference judges that measuring point is previous without significant change
Heat exchanger does not leak；
F. data processing unit calculates the growth rate of temperature value deviation in lower wall on sintering machine large flue in real time, when inclined
Difference growth rate persistently raises in 5min, sends when continuous increasing value per minute is more than 2 DEG C and alarms for the first time, when growth rate exists
Continue to raise in 20min, occurring second when continuous increasing value per minute is more than 2 DEG C alarms, and prompts operations staff should be tight immediately
Anxious processing leakage accident, is calculated until operations staff resets.
Further, data processing unit also carries error correction arbitration functions, when sintering machine large flue upper wall wall temperature is less than
During the situation of sintering machine large flue lower wall wall temperature, if it is determined that when difference is less than 5 DEG C, then it is considered as measurement error, if it is determined that poor
When value is more than 5 DEG C, then prompting checks temperature sensor on a display screen, and gives up this partial error data automatically, not calculates.
Further, the set time unit is 0.5min.
Further, the collecting unit changes for temperature sensor in sintering machine large flue upper wall after every group of heat exchanger and every group
Temperature sensor in sintering machine large flue lower wall after hot device.
Further, the data processing unit is microprocessor.
Further, the memory cell is computer disk or solid state hard disc memory.
Further, the display unit is liquid crystal display.
The beneficial effects of the invention are as follows：
1）The principle of the invention is simple, efficient, accurate, once the temperature difference increase of display wall temperature, can clearly judge must have
Carbonated drink leakage phenomenon occurs, and is that instead of the effective ways that confluent judges with the measurement of steam flow difference.
2）Present invention detection is quick, and leakage can be measured with the very first time, effectively reduces contingency occurrence probability.Heat exchange list can be made
Member leakage judges time advance at least more than 2 hours, heat exchange unit is handled it in time when leaking, so as to ensure life
The stability of production, avoid the generation of contingency.
Brief description of the drawings
Fig. 1 is temperature measuring point scheme of installation of the present invention.
In figure, 1 sintering machine, 2 waste heat boilers, wall temperature probe temperature sensor on 3 sintering machine large flues, 4 memory cell,
5th, display unit, 6 data processing units, 7 sintering machine large flues, 8 heat exchangers, wall temperature probe temperature passes under 9 sintering machine large flues
Sensor, 11 feedwater, 12 steam.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of determination methods of the built-in waste heat boiler water leakage of sintering machine large flue of the present invention, it is special
Sign is, comprises the following steps：
A. temperature value and sintering machine in sintering machine large flue upper wall are gathered after every group of heat exchanger 8 in real time by collecting unit
Temperature value data message in large flue lower wall；The collecting unit passes for temperature in sintering machine large flue upper wall after every group of heat exchanger
Temperature sensor 9 in sintering machine large flue lower wall after sensor 3 and every group of heat exchanger.Here can be carried out by existing DCS systems
Flow collection, flow can also be gathered by other special equipment.
B. temperature Value Data in temperature value in the sintering machine large flue upper wall collected and sintering machine large flue lower wall is believed
Breath is delivered to data processing unit 6, is handled by data processing unit 6 and obtains temperature in current sintering machine large flue upper wall per second
Temperature value in value and sintering machine large flue lower wall per second；
C. by temperature value in temperature value in sintering machine large flue upper wall per second and sintering machine large flue lower wall per second with fixation
Chronomere is added up respectively for interval, and the set time unit is 0.5min, can not only ensure the ageing of detection,
Influence of the accidental error to measurement result can be reduced simultaneously.
Difference is asked to obtain temperature value in temperature value in the sintering machine large flue upper wall after adding up and sintering machine large flue lower wall
Temperature value difference in lower wall on to sintering machine large flue, and by temperature value Difference Storage is being deposited in lower wall on the sintering machine large flue
4 in storage unit；The memory cell 4 is computer disk or solid state hard disc memory.
D. the sintering machine opium that temperature value difference obtains with previous time series in real time in lower wall on sintering machine large flue
Temperature value difference seeks difference in lower wall on road, obtains on sintering machine large flue temperature value deviation in lower wall, will be warm in upper lower wall
Angle value deviation feeds back to observer by display unit 5, and the display unit 5 is liquid crystal display；
E. on observer's Real Time Observation sintering machine large flue in lower wall temperature value deviation variation tendency, if difference is dashed forward
Rise and continue to increase, then judge that the previous heat exchanger 8 of measuring point leaks, if difference judges that measuring point is previous without significant change
Individual heat exchanger 8 does not leak；
F. data processing unit 6 calculates the growth rate of temperature value deviation in lower wall on sintering machine large flue in real time, when inclined
Difference growth rate persistently raises in 5min, sends when continuous increasing value per minute is more than 2 DEG C and alarms for the first time, when growth rate exists
Continue to raise in 20min, continuous increasing value per minute more than 2 DEG C, when occur second and alarm, prompt operations staff should be tight immediately
Anxious processing leakage accident, is calculated, the data processing unit 6 is microprocessor until operations staff resets.
Further, data processing unit 6 of the invention also carries error correction arbitration functions.Due to the fluctuation of flue-gas temperature, it is
System such as leaks out at the factor, may cause to occur sintering machine large flue upper wall wall temperature and feelings less than sintering machine large flue lower wall wall temperature occurs
Condition.In the event of water leakage accident, upper wall temperature can not possibly be less than lower wall temperature, so needing the automatic debug numerical value of computer.
Determination methods are：If it is determined that when difference is less than 5 DEG C, then it is considered as measurement error, if it is determined that when difference is more than 5 DEG C, then aobvious
Prompting checks temperature sensor in display screen, and gives up this partial error data automatically, not calculates.
Sinter general built-in 2~3 heat exchangers on large flue.The temperature difference of wall temperature up and down rise behind any one heat exchanger
The previous heat exchanger leakage of general proxy, because being generally disposed with Lou ash bucket 10 below heat exchanger, the leak of heat exchanger 8 is led to
Chang Buhui crosses next stage heat exchanger；Heat exchanger leak has leakage and spray regime forward.
The characteristics of present invention is much larger than the density of flue gas using liquid coolant-temperature gage far below flue-gas temperature, the density of water, surveys
The wall temperature up and down of sintering machine large flue 7 after every heat exchanger 8, and calculating temperature difference are measured, judges that waste heat boiler leaks with the presence or absence of water.
The measurement temperature of sintering machine large flue upper wall can represent the temperature of flue gas, and not influenceed substantially by water leakage, and sintering machine is big
The wall temperature of flue lower wall is directly influenceed by flue gas and water, if certain heat exchanger has water leakage, then the sintering in downstream
Machine large flue lower wall wall temperature can be reduced rapidly, so as to increase the wall temperature temperature difference above and below the sintering machine large flue in downstream.In waste heat boiler
During normal operation, an initial temperature differences are demarcated, if the temperature difference of wall temperature up and down of sintering machine large flue can be cherished more than 10 DEG C suddenly
Leakage phenomenon is suspected to have, if it exceeds 40 DEG C then determine to have leakage, it is necessary to operations staff's emergent management.
The present invention can also install one group of wall temperature measurement point again on sintering machine large flue head and be used to measure heat-exchanger rig
Micro-leakage.When micro-leakage, water can evaporate because of the high temperature of flue gas, in sintering large flue head zone, large flue
Flue-gas temperature would generally reduce, and condense into drop because of the reason for flue gas dew point is higher sometimes, and now temperature element measures temperature
Temperature approach is shown over the display after difference, reminds operations staff to pay attention to.Temperature element herein carries anticorrosion sleeve pipe.
Claims (7)
1. a kind of determination methods of the built-in waste heat boiler water leakage of sintering machine large flue, it is characterised in that comprise the following steps：
A. temperature value and sintering machine large flue in sintering machine large flue upper wall are gathered after every group of heat exchanger in real time by collecting unit
Temperature value data message in lower wall；
B. temperature value data message in temperature value in the sintering machine large flue upper wall collected and sintering machine large flue lower wall is passed
Data processing unit is delivered to, temperature value and every is handled to obtain in current sintering machine large flue upper wall per second by data processing unit
Temperature value in second sintering machine large flue lower wall；
C. by temperature value in temperature value in sintering machine large flue upper wall per second and sintering machine large flue lower wall per second with the set time
Unit is added up respectively for interval, in temperature value and sintering machine large flue lower wall in the sintering machine large flue upper wall after adding up
Temperature value asks difference to obtain on sintering machine large flue temperature value difference in lower wall, and by temperature in lower wall on the sintering machine large flue
Value difference value stores in the memory unit；
D. on the sintering machine large flue that temperature value difference obtains with previous time series in real time in lower wall on sintering machine large flue
Temperature value difference seeks difference in lower wall, temperature value deviation in lower wall is obtained on sintering machine large flue, by sintering machine large flue
Temperature value deviation feeds back to observer by display unit in lower wall；
E. on observer's Real Time Observation sintering machine large flue in lower wall temperature value deviation variation tendency, if difference jump and
Continue to increase, then judge that the previous heat exchanger of measuring point leaks, if difference judges the previous heat exchange of measuring point without significant change
Device does not leak；
F. data processing unit calculates the growth rate of temperature value deviation in lower wall on sintering machine large flue in real time, works as deviation
Growth rate persistently raises in 5min, sends when continuous increasing value per minute is more than 2 DEG C and alarms for the first time, when growth rate exists
Continue to raise in 20min, occurring second when continuous increasing value per minute is more than 2 DEG C alarms, and prompts operations staff should be tight immediately
Anxious processing leakage accident, is calculated until operations staff resets.
2. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
Error correction arbitration functions are also carried in data processing unit, when being less than under sintering machine large flue occurs in sintering machine large flue upper wall wall temperature
During the situation of wall wall temperature, if it is determined that when difference is less than 5 DEG C, then it is considered as measurement error, if it is determined that when difference is more than 5 DEG C, then
Prompting checks temperature sensor on a display screen, and gives up this partial error data automatically, not calculates.
3. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
In the set time unit is 0.5min.
4. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
In the collecting unit is to be burnt in every group of heat exchanger rear pass sintering machine large flue upper wall after temperature sensor and every group of heat exchanger
Temperature sensor in knot machine large flue lower wall.
5. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
In the data processing unit is microprocessor.
6. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
In the memory cell is computer disk or solid state hard disc memory.
7. the determination methods of the built-in waste heat boiler water leakage of sintering machine large flue according to claim 1, its feature exist
In the display unit is liquid crystal display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610648667.1A CN106224931B (en) | 2016-08-10 | 2016-08-10 | The determination methods of the built-in waste heat boiler water leakage of sintering machine large flue |
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|---|---|---|---|
| CN201610648667.1A CN106224931B (en) | 2016-08-10 | 2016-08-10 | The determination methods of the built-in waste heat boiler water leakage of sintering machine large flue |
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| CN106224931A CN106224931A (en) | 2016-12-14 |
| CN106224931B true CN106224931B (en) | 2018-02-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106918033A (en) * | 2017-03-21 | 2017-07-04 | 山东中实易通集团有限公司 | Three impulses leakage of boiler tubes alarm control system and method |
| CN108844688B (en) * | 2018-06-25 | 2023-06-13 | 华能国际电力股份有限公司 | System and method for monitoring leakage of low-temperature heat exchanger |
| CN115435619A (en) * | 2022-09-13 | 2022-12-06 | 西安热工研究院有限公司 | Gas-water heat exchanger leakage monitoring system and method |
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| CN101839795A (en) * | 2010-05-10 | 2010-09-22 | 任振伟 | The leak diagnostic systems of pressure-bearing pipe of boiler and method |
| CN102734785A (en) * | 2012-07-04 | 2012-10-17 | 攀钢集团攀枝花钢钒有限公司 | Leakage judging method for boiler economizer in power plant |
| CN203758712U (en) * | 2013-12-24 | 2014-08-06 | 舒少辛 | Leakage detection device for waste heat recovery heat exchanger |
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