CN1570580A - Thermocouple temperature monitoring method and system for air preheater - Google Patents
Thermocouple temperature monitoring method and system for air preheater Download PDFInfo
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- CN1570580A CN1570580A CNA031416594A CN03141659A CN1570580A CN 1570580 A CN1570580 A CN 1570580A CN A031416594 A CNA031416594 A CN A031416594A CN 03141659 A CN03141659 A CN 03141659A CN 1570580 A CN1570580 A CN 1570580A
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
This invention relates to a measuring method and system for air temperature of preheater couple. The method is as following: to fix eleven exclusive heat electric thermocouple probes according to the size and direction of the radius of preheater in the air outlets on A, B side of the preheater; and to fix two exclusive electric thermocouple probes in the air inlet and to fix two exclusive electric thermocouple probes in gas inlet and to fix hoop approach switch and inductive slice in rotary axis of preheater. The whole apparatus can be operated with electricity, setting the temperature of temperature controller in control cabinet. Then to calculate the temperature of air inlet, gas inlet and air outlet through the program control and thus get a group of values of temperature efficiency of preheater. The temperature around inner points of the preheater can be read on the touch display.
Description
Technical field
The present invention relates to a kind of air preheater electric thermo-couple temperature monitoring method and system, be used for the air preheater electric thermo-couple temperature monitoring of large-scale thermal power machine group boiler, belong to air preheater electric thermo-couple temperature monitoring technical field.
Background technology
Air preheater is the important support equipment of Generator Set boiler, in air preheater inside, be deposited on the imperfect combustion accumulation in heated element surface, run into the oxygen of air in place abundance, be easy to generate focus, if this focus slowly spreads, just can cause the heated element catching fire, form fire, serious with causing, irremediable loss, in order to prevent that air preheater from catching fire, need in the air preheater system, monitoring device be installed, commonly used have infra-red heat point probe and a thermopair detector, their detection base reason is only monitored the temperature in air preheater air in place or exit, has ignored the influence of other temperature fluctuation of importing and exporting of air preheater to whole air preheater temperature rise everywhere, is to judge whether have focus to produce with the absolute value of C.T., these equipment are in security, reliability and also have some problems on serviceable life, and be easy to generate false alarm.
Summary of the invention
The objective of the invention is to invent a kind of temperature that can monitor the inner flue gas of air preheater and air in real time, minimizing false alarm, reliable and stable, air preheater electric thermo-couple temperature monitoring method and system that degree of accuracy is high, easy to maintenance.
For realizing above purpose, technical scheme of the present invention provides a kind of air preheater electric thermo-couple temperature monitoring method and system, it is characterized in that, adopt the multi-point temp data acquisition, the integrated control of programmable controller and touch-screen, calculate the hot effect of air preheater and be worth to come monitor temperature, its monitoring method comprises:
(1) the primary heater radius size is pressed at the air out place of A, B side in air preheater, along m special electric thermo-couple probe groups is installed on the radial direction, at the air in place n special electric thermo-couple probe is installed respectively, n special electric thermo-couple probe respectively is installed at the gas approach place;
(2) install on the primary heater rotation axis that sensing chip is installed hoop and near switch;
(3) close air switch in the switch board, and then the switch on the switch board panel that closes, promptly package unit has powered on and has brought into operation;
(4) temperature controller in the switch board being carried out temperature sets;
(5) be admitted to signal pre-processing module from the millivolt signal of special electric thermo-couple probe and carry out pre-service, be converted to temperature signal, by programmable controller the temperature at air in place, gas approach place and air out place is calculated again, drawn the temperature efficiency value En of one group of air preheater;
(6) rotor whenever circles, and programmable controller will calculate the temperature efficiency mean value of one group of air preheater in this week;
(7) touch-screen display shows near the medial temperature at temperature value, air preheater temperature efficiency value and whole air preheater air out place that the inner measuring point of air preheater is in real time;
(8) when warning or disconnected even phenomenon occurring, touch-screen will provide the indication of reporting to the police.
(9) rotate when unusual when rotor, touch-screen will provide the indication of reporting to the police.
Use the required device of this method to comprise 2 (m+2n) special electric thermo-couple probe and switch board.
Described switch board comprises signal pre-processing module, programmable controller and related software and touch-screen display.
Temperature monitoring is by being arranged in air preheater A, air out place, the B both sides heat extraction galvanic couple sensor along radial direction, every probe is responsible for the temperature in certain zone, after the rotor rotation, the thermopair investigative range just can cover whole primary heater heat transfer element, the dead angle can not occur like this.Arrange a high sensitivity thermocouple probe respectively at air preheater air in place and gas approach place, be used for monitoring this regional medial temperature, this temperature value is also as the reference value of system-computed thermal efficiency value, in order to ensure the safe and reliable of monitoring system, thermocouple probe herein has acknowledgment copy, when primary probe breaks down, system will automatically switch to standby probe, notify managerial personnel to take the necessary measures simultaneously.
When air preheater electric thermo-couple temperature monitoring system is worked, be admitted to signal pre-processing module from the millivolt signal of special electric thermo-couple and carry out pre-service, be converted to temperature signal.By programmable controller PLC the temperature at air in place, gas approach place and air out place is calculated again, drawn the temperature efficiency value En of one group of air preheater, thermal efficiency value computing formula: En=(Tao-Tai)/(Tgi-Tai)
In the formula: the air out place temperature that each thermopair of Tao-records;
Tai-air in place temperature;
Tgi-gas approach place temperature.
Along with rotor whenever circles, PLC will calculate the temperature efficiency mean value En-alarm of one group of air preheater in this week.Method that adopt to calculate air preheater thermal efficiency value is than only judging that with the absolute value of C.T. that whether the focus generation is arranged is more effective, because En is not too responsive to the fluctuation of the temperature T ai of air in place, and the slight change between the temperature T ao that it records gas approach temperature T gi and each thermopair of air out place is very responsive, so just help to reduce false alarm rate, simultaneously native system can be checked the record value trend curve in each measuring point 2 hours, make things convenient for the operations staff to differentiate, if the rotor in the air preheater has " focus " to produce in rotation process, this regional temperature will rise suddenly.This temperature that produces suddenly that detects the air out place when the thermocouple monitoring system increases, and when surpassing alarm setting value, system will deliver to central station of floating dock with alerting signal.Check to the scene by operating personnel then, carry out necessary judgement and adopt an effective measure, with the generation of accident prevention.
Increase the rotor stppage alarm in the temperature monitoring system of the present invention newly.Because when metal heated element surpasses to a certain degree, metal framework structure meeting expanded by heating, cause malformation and heavy wear air preheater inwall, the heated element rotating speed declines to a great extent or random jump thereupon, it all may be the key character that air preheater catches fire, so the rotating speed to heated element is monitored, can catch fire from another angle prevention air preheater, will improve the reliability of integrated alarm.
Advantage of the present invention is:
1. adopt the multi-point temp data acquisition, utilize the hot effect value of air preheater, greatly reduce ambient temperature the judgement of reporting to the police is disturbed as the monitoring foundation.
2. adopt the integrated control of programmable controller and touch-screen, realize man-machine conversation, increased the reliability and the serviceable life of system.
3. in whole monitoring system, increase the rotor stppage alarm newly; Improve the reliability of integrated alarm.
4. multi-point temp data acquisition precision＜0.1% of system, false alarm＜0.03%.
Description of drawings:
Fig. 1 is an air preheater thermocouple probe arrangenent diagram;
Fig. 2 is an air preheater thermocouple probe arrangenent diagram B-B sectional view;
Fig. 3 is the switch board structural representation;
Fig. 4 is a switch board panel synoptic diagram;
Fig. 5 is an air preheater electric thermo-couple temperature monitoring system programmable design flow diagram;
Embodiment:
The invention will be further described below in conjunction with drawings and Examples, is example to join the 300MW boiler air preheater.
Device required for the present invention comprises:
(1) 30 special electric thermo-couple probe;
(2) special electric thermo-couple probe mounting pipe;
(3) switch board
As shown in Figure 1, 2, be air preheater thermocouple probe arrangenent diagram, by air preheater 1, two groups of 11 special electric thermo-couple probe groups in air out place 2, two groups of 2 special electric thermo-couple probes 4 in 3, two groups of gas approach places of 2 special electric thermo-couple probes, air in place, thermopair group mounting pipe 5, on the spot terminal box 6, stppage alarm sensing chip hoop 7, form near switch 8.
A in air preheater 1, the primary heater radius size is pressed at the air out place of B side, along 11 special electric thermo-couple probe groups 2 are installed on the radial direction, thermocouple probe group 2 packs into 5 li of thermopair group mounting pipe, be installed on the hot junction intermediate beam of air preheater 1, the hot surface of as close as possible rotor, 2 special electric thermo-couple probes 3 respectively are installed at the air in place, 2 special electric thermo-couple probes 4 respectively are installed at the gas approach place, terminal box 6 is installed on outside the air out place on the spot, all thermocouple probes are connected in terminal box 6 on the spot with cable, stppage alarm sensing chip hoop 7 is installed on the rotor of air preheater 1, installs simultaneously near switch 8.
As shown in Figure 3, be the switch board synoptic diagram, form by casing 9, auxiliary reclay 10, air switch and hummer 11, signal pre-processing module 12, programmable controller 13, connection terminal 14.(connected mode)
The present invention has used 7 block signal pretreatment module 12, and they are changed the millivolt signal that special electric thermo-couple produces respectively, make it to become temperature signal, flow to programmable controller 13 and handle.
The En and the En mean value of each point mainly handled the temperature signal of input, calculate by programmable controller 13, and the numerical value that calculates done analysis, draws alerting signal more then, and exporting it to central station of floating dock, programmable controller 13 also sends signal to touch-screen and shows simultaneously.
As shown in Figure 4, be switch board panel synoptic diagram, by the system alarm of touch-screen display 15, A, B both sides, high temperature, disconnected even pilot lamp with power supply, operation, heating, A reset, noise elimination, B reset button are formed.
Touch-screen display 15 mainly carries out real time monitoring to the inner A of current air preheater, B side temperature, and operating personnel can observe temperature value and thermal efficiency value trend trend by touch-screen at every.Can also carry out necessary setting or the like to temperature comparison base value.When warning or disconnected even phenomenon occurring, touch-screen can carry out the light indication to it, notes to cause operating personnel.
Touch-screen display 15 mainly is made up of following 5 interfaces:
1. welcome interface:
This interface generates automatically for the back of starting shooting, and when showing the welcome interface, system begins to carry out inner self check work, enters A/B side temperature monitoring interface after about 15 seconds automatically.
2. temperature monitoring interface:
As above right figure is depicted as A side temperature monitoring interface, during normal at ordinary times no any warning, and demonstration air out 11 road temperature value T, thermal efficiency value E and average temperature value, air in and gas approach place temperature value.At this moment pilot lamp is green.
When the situation that setting value occurs being higher than when arbitrary road temperature value is high temperature alarm, its next door will have the red led indication.The thermal efficiency value that this moment, calculated on this road also will be affected.
When the temperature efficiency value was system alarm greater than the efficiency value base value, green indication transferred the red led indication to.
When disconnected idol appearred in arbitrary road in the air out place ten one tunnel, green indication transferred the yellow indicator lamp indication to, and mean value only shows the temperature-averaging value of using normal thermopair.The thermal efficiency value that this moment, calculated on this road also will be affected and can not react truth, thereby can show " #### ".
When air in and the disconnected idol of gas approach place appearance, green indication transfers yellow indicator lamp to indicates, and automatically switches to standby, show standby temperature simultaneously, and its next door has the green indicating lamp indication.
Standby disconnected idol also occurs when air in or gas approach place, and its next door will have the yellow indicator lamp indication, and air out place ten one tunnel thermal efficiency value all will can not reacted truth owing to this phenomenon is affected this moment, thereby can show " #### ".But each road thermopair still can normally show the temperature at each measuring point place, and operating personnel still can monitor the internal temperature situation at air preheater air out place by the kelvin rating of observing each road.
If operating personnel need specifically check the real-time tendency of a certain road temperature value and thermal efficiency value, can the trend map shown in bottom right figure will appear by the button on this road T value and the E value left side, can be back to the temperature monitoring interface by the return push-button in the upper right corner.
If when operating personnel need inquire about the fault of appearance and warning phenomenon, can enter " fault display interface " by " fault inquiry " button and inquire about;
If when operating personnel need inquire about all faults that occurred and warning phenomenon, can enter " historical record display interface " by " historical record " button and inquire about;
If operating personnel need make amendment or reset setting value, can enter " setting interface " and operate by " setting value modification " button;
In addition, the temperature monitoring interface is to monitor the temperature of A, B both sides and thermal efficiency value with the form that 15 second wheels stream shows after the system start-up, if operating personnel want to rest on certain fixing interface A side or the observation of B side, can press " fixing " button fixes, the button that " fixes " at this moment can become the Auto button, if think to return to again the state of automatic switchover, press the Auto button and get final product.
The function for monitoring at B side primary heater temperature monitoring interface is identical with the A side.
3. setting interface:
As above left figure is depicted as and sets the interface, and managerial personnel can reset and revise temperature value, only need click the numerical value of required modification during operation, and screen can eject a keypad automatically, at this moment can import the numerical value that needs, and presses enter key to confirm.More than operation needs the input password, can carry out parameter setting.
4. fault display interface:
This interface mainly shows:
(1). the position of warning, type, temperature value at that time or thermal efficiency value and time;
(2). position, the time of disconnected idol, this interface content can upgrade automatically along with the arrival of new warning.If need return main interface gets final product by " returning " key, " removing " key will be removed all records.
5. historical record display interface;
This interface mainly shows all faults that occurred and the historical record of warning phenomenon.
(1). the position of warning, type, temperature value at that time or thermal efficiency value and time;
(2). position, the time of disconnected idol.
Have 7 pilot lamp on the switch board panel.
Alarm lamp: when system no matter during any warnings in the still disconnected even fault of A, B side generation high temperature alarm, system alarm, the indication of all can glimmering of this pilot lamp, the prompting operating personnel arouse attention.And a secondary dry contact signal conveys is arranged to central station of floating dock.
High temperature alarm: when system no matter A, B side generation high temperature alarm, corresponding A, B side high temperature alarm pilot lamp are lighted.And a secondary dry contact signal conveys is arranged respectively to central station of floating dock.
System alarm: when system no matter A, B side generation systems report to the police, corresponding A, B side system alarm lamp are lighted.And a secondary dry contact signal conveys is arranged respectively to central station of floating dock.
Disconnected even fault: when system no matter A, B side disconnected even fault takes place, corresponding A, the disconnected even malfunction indicator lamp of B side are lighted.And a secondary dry contact signal conveys is arranged respectively to central station of floating dock.
Pilot lamp such as general supply, operation and heating are arranged on the outer door face board,
In addition, A resets in addition, B resets and three buttons of eliminating the noise, and their function is as follows respectively:
A resets: when even fault takes place to break the A of system side, operating personnel learn this fault by the pilot lamp of touch-screen and door inner panel, press this " A resets " button this moment, fault output can be resetted, promptly " indicating fault " lamp of door inner panel and " warning " lamp stop indication.
B resets: when even fault takes place to break the B of system side, operating personnel learn this fault by the pilot lamp of touch-screen and door inner panel, press this " B resets " button this moment, fault output can be resetted, promptly " indicating fault " lamp of door inner panel and " warning " lamp stop indication.
Eliminate the noise: when total system detects any fault or alarm condition, all have acoustic alarm, press " noise elimination " button and can eliminate acoustic alarm this moment.
Stppage alarm device equipment has the sensing chip that is contained on the primary heater rotation axis that hoop 7 is installed, form near switch 8 and its erecting frame, when primary heater rotates, the sensing chip 7 that is contained on the primary heater shaft passes through successively near switch 8 places, sensing chip and produce pulse signal because of the gap changes near switch room, comparison is counted and calculated to PLC paired pulses quantity, when the number of pulses of receiving in the unit interval with in advance by the numerical value of operate as normal speed setting when consistent, the expression primary heater rotates normal, when the number of pulses of receiving in the unit interval is lower than in advance numerical value by the operate as normal speed setting, or exceed setting-up time and do not receive pulse signal, expression rotor speed is crossed low or stall, and system sends alerting signal.System can set the instant playback velocity of rotation for.
After adopting this function, will increase primary heater A stall and primary heater B stall pilot lamp on the control box, the integrated alarm lamp is bright, and the prompting of primary heater A or B stall can appear in display screen fault alarm page or leaf, and the historical record page or leaf can show the time that rotor rotation is unusual.
When starting working, the interior air switch of switch board closes, and then the switch on the switch board panel that closes, be that package unit has powered on and brings into operation, temperature controller in the switch board is carried out temperature to be set, be admitted to signal pre-processing module 12 from the millivolt signal of special electric thermo-couple and carry out pre-service, be converted to temperature signal, again by programmable controller 13 with the air in place, the temperature at gas approach place and air out place is calculated, draw the temperature efficiency value En of one group of air preheater, rotor whenever circles, programmable controller 13 will calculate the temperature efficiency mean value of one group of air preheater in this week, touch-screen display 15 in time shows near the temperature value the inner measuring point of air preheater, the medial temperature at air preheater temperature efficiency value and whole air preheater air out place, when warning or disconnected even phenomenon occurring, touch-screen display 15 will provide the indication of reporting to the police.
As shown in Figure 5, be air preheater electric thermo-couple temperature monitoring system programmable design flow diagram, after the start, the interface appears welcoming in touch-screen display 15, begin self check simultaneously, self check by after begin to gather thermocouple signal and calculate, relatively the back in time shows at touch-screen display 15, see if there is abnormal occurrence, whether need setting value to revise, whether check record, deposit historical record then in, if fault is arranged, the warning of touch-screen display 15 and fault display interface show and deposit historical record in that final fault is eliminated.
Claims (3)
1. air preheater electric thermo-couple temperature monitoring method and system is characterized in that, adopt the multi-point temp data acquisition, and the integrated control of programmable switch board box touch-screen is calculated the hot effect value of air preheater and monitored, and its monitoring method comprises:
(1) the primary heater radius size is pressed at the air out place of A, B side in air preheater (1), along m special electric thermo-couple probe groups (2) is installed on the radial direction, at the air in place n special electric thermo-couple probe (3) is installed respectively, n special electric thermo-couple probe (4) respectively is installed at the gas approach place;
(2) install on the primary heater rotation axis that sensing chip is installed hoop (7) and near switch (8);
(3) close air switch in the switch board, and then the switch on the switch board panel that closes, promptly package unit has powered on and has brought into operation;
(4) temperature controller in the switch board being carried out temperature sets;
(5) be admitted to signal pre-processing module (12) from the millivolt signal of special electric thermo-couple probe and carry out pre-service, be converted to temperature signal, by programmable controller (13) temperature at air in place, gas approach place and air out place is calculated again, drawn the temperature efficiency value En of one group of air preheater;
(6) rotor whenever circles, and programmable controller (13) will calculate the temperature efficiency mean value of one group of air preheater in this week;
(7) touch-screen display (15) shows near the medial temperature at temperature value, air preheater temperature efficiency value and whole air preheater air out place that the inner measuring point of air preheater is in real time;
(8) when warning or disconnected even phenomenon occurring, touch-screen display (15) will provide the indication of reporting to the police.
(9) rotate when unusual when rotor, touch-screen will provide the indication of reporting to the police.
2. use the required device of this method to comprise:
(1) 2 (m+2n) special electric thermo-couple probe;
(2) special electric thermo-couple probe mounting pipe;
(3) switch board.
3. air preheater electric thermo-couple temperature monitoring system according to claim 2 is characterized in that described switch board comprises:
(1) signal pre-processing module (12);
(2) programmable controller and related software (13);
(3) touch-screen display (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031416594A CN100367015C (en) | 2003-07-17 | 2003-07-17 | Thermocouple temperature monitoring method and system for air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031416594A CN100367015C (en) | 2003-07-17 | 2003-07-17 | Thermocouple temperature monitoring method and system for air preheater |
Publications (2)
| Publication Number | Publication Date |
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| CN1570580A true CN1570580A (en) | 2005-01-26 |
| CN100367015C CN100367015C (en) | 2008-02-06 |
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| CNB031416594A Expired - Lifetime CN100367015C (en) | 2003-07-17 | 2003-07-17 | Thermocouple temperature monitoring method and system for air preheater |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102393262A (en) * | 2011-09-22 | 2012-03-28 | 上海市东方海事工程技术有限公司 | Air preheater optical fiber temperature on-line monitoring system and method |
| CN103759860A (en) * | 2014-02-20 | 2014-04-30 | 北京七星华创电子股份有限公司 | Thermocouple fault diagnosis and processing method and system of semiconductor heat treatment device |
| CN105486162A (en) * | 2015-12-31 | 2016-04-13 | 上海市东方海事工程技术有限公司 | Optical fiber air preheater air leakage control system and control method thereof |
| CN109307279A (en) * | 2018-08-31 | 2019-02-05 | 华能海南发电股份有限公司 | A kind of rotary regenerative air preheater stppage alarm and automatic processing method |
| CN110873830A (en) * | 2018-08-31 | 2020-03-10 | 霍尼韦尔国际公司 | Atmospheric data probe replacement determination system |
| CN112034782A (en) * | 2020-09-17 | 2020-12-04 | 江阴信和电力仪表有限公司 | Air preheater online state monitoring and fault prediction method |
| CN112433551A (en) * | 2020-11-03 | 2021-03-02 | 北方魏家峁煤电有限责任公司 | Air preheater warning system, method and computer readable medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1126827A (en) * | 1995-01-13 | 1996-07-17 | 河南俊达石化检测技术研究所 | High-temp high-viscosity liquid level simulating test and display system used in petrochemical engineering |
| JP2000055743A (en) * | 1998-08-06 | 2000-02-25 | Anritsu Keiki Kk | Multi-point mean temp. measuring apparatus |
| JP2000065651A (en) * | 1998-08-26 | 2000-03-03 | Yokogawa Electric Corp | Multi point temperature-measuring apparatus |
| CN2447761Y (en) * | 2000-10-18 | 2001-09-12 | 浙江省永康温度仪表厂 | Integral multi-point armoured thermo-couple |
| CN2465047Y (en) * | 2000-12-28 | 2001-12-12 | 高泰荫 | Mechanical coal combustion hot blast furnace |
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2003
- 2003-07-17 CN CNB031416594A patent/CN100367015C/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243109A (en) * | 2011-06-28 | 2011-11-16 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102243109B (en) * | 2011-06-28 | 2013-03-13 | 高明逊 | Metal wall temperature measurement system for rotary air preheater |
| CN102393262A (en) * | 2011-09-22 | 2012-03-28 | 上海市东方海事工程技术有限公司 | Air preheater optical fiber temperature on-line monitoring system and method |
| CN103759860A (en) * | 2014-02-20 | 2014-04-30 | 北京七星华创电子股份有限公司 | Thermocouple fault diagnosis and processing method and system of semiconductor heat treatment device |
| CN105486162A (en) * | 2015-12-31 | 2016-04-13 | 上海市东方海事工程技术有限公司 | Optical fiber air preheater air leakage control system and control method thereof |
| CN105486162B (en) * | 2015-12-31 | 2018-05-18 | 上海市东方海事工程技术有限公司 | A kind of optical fiber type air preheater air leak control system and its control method |
| CN109307279A (en) * | 2018-08-31 | 2019-02-05 | 华能海南发电股份有限公司 | A kind of rotary regenerative air preheater stppage alarm and automatic processing method |
| CN110873830A (en) * | 2018-08-31 | 2020-03-10 | 霍尼韦尔国际公司 | Atmospheric data probe replacement determination system |
| CN112034782A (en) * | 2020-09-17 | 2020-12-04 | 江阴信和电力仪表有限公司 | Air preheater online state monitoring and fault prediction method |
| CN112433551A (en) * | 2020-11-03 | 2021-03-02 | 北方魏家峁煤电有限责任公司 | Air preheater warning system, method and computer readable medium |
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| Publication number | Publication date |
|---|---|
| CN100367015C (en) | 2008-02-06 |
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