CN102393262A - Air preheater optical fiber temperature on-line monitoring system and method - Google Patents
Air preheater optical fiber temperature on-line monitoring system and method Download PDFInfo
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- CN102393262A CN102393262A CN2011102823156A CN201110282315A CN102393262A CN 102393262 A CN102393262 A CN 102393262A CN 2011102823156 A CN2011102823156 A CN 2011102823156A CN 201110282315 A CN201110282315 A CN 201110282315A CN 102393262 A CN102393262 A CN 102393262A
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Abstract
The invention discloses an air preheater optical fiber temperature on-line monitoring system and an air preheater optical fiber temperature on-line monitoring method. The system comprises distributive optical fiber temperature sensors, a mounting bracket, a stall alarm device and a control cabinet, wherein the control cabinet is connected with the distributive optical fiber temperature sensors and the stall alarm device through signals; the optical fiber temperature sensors are arranged in an air preheater along the radium direction; a rotor of the air preheater is provided with a stall alarm device induction piece hoop; four sets of optical fiber temperature sensors are arranged in an optical fiber temperature sensor mounting frame. The distributive special optical fiber temperature sensors acquire temperature data, and ranges of monitoring blind spots and dead zones are greatly reduced; and by integrated control of a special analyzer, a programmable controller and a touch screen, man-machine conversation is realized, the reliability of the system is improved and the service life of the system is prolonged.
Description
Technical field
The present invention relates to air preheater monitoring temperature technical field, relate in particular to a kind of primary heater temperature optical fiber online monitoring system and method for supervising thereof.
Background technology
Air preheater is the important support equipment of Generator Set boiler, and is inner at air preheater, is deposited on the imperfect combustion accumulation in heated element surface; Run into the sufficient oxygen in air in place, be easy to generate focus, if this focus slowly spreads; Just can cause the heated element catching fire, form fire, causing serious, irremediable loss; In order to prevent that air preheater from catching fire, need in the air preheater system, supervising device be installed, commonly used have infra-red heat point probe and a thermopair detector; Their detection mechanism all adopts the point-like test mode; And judge whether have focus to produce, these equipment are in security, reliability and also have some problems on serviceable life, and are easy to generate false alarm with the absolute value of C.T..
Summary of the invention
The objective of the invention is to solve the problems of the prior art; A kind of temperature that can monitor air preheater inner air exit in real time is provided, reduces false alarm, reliable and stable, preheating of air actuator temperature optical fiber online monitoring system and method for supervising thereof that degree of accuracy is high, easy to maintenance.
Technical scheme of the present invention is: a kind of preheating of air actuator temperature optical fiber online monitoring system; Comprise distributed optical fiber temperature sensor, mounting bracket, stppage alarm device and switch board; Said switch board signal connects said distributed optical fiber temperature sensor, stppage alarm device; Along radial direction fibre optic temperature sensor is installed at said air preheater, stppage alarm device sensing chip clip is installed on the rotor of said air preheater.
Said fibre optic temperature sensor is 4 covers, is installed in the inside of fibre optic temperature sensor erecting frame.
Said fibre optic temperature sensor erecting frame is installed on the hot junction intermediate beam of air preheater, near the hot surface of rotor.
Said stppage alarm device comprises stppage alarm sensing chip clip and near switch, said switch board comprises switch board panel and inner member, and said switch board panel is arranged on the cabinet door, and inner member is arranged at cabinet inside.
Said control panel is provided with touch-screen, indicator and analyser, and said touch-screen periphery is provided with the indicator, and said analyser is located at the below of control panel.
Said indicator comprises broken string, stall, constant temperature, differential temperature, focus, power supply, operation, warning and noise elimination pilot lamp; Said broken string, stall, constant temperature, differential temperature, focus same column are provided with; Said power supply, operation, warning and noise elimination are provided with together, and are provided with switch in a side of noise elimination pilot lamp.
Said inner member comprises Programmable Logic Controller, auxiliary reclay, hummer, air switch and connection terminal, signal transmission each other between said Programmable Logic Controller, auxiliary reclay, hummer, air switch and the connection terminal.
(1), online monitoring system powers on, after system powered on and finishes, system got into the self check state, carries out self check;
(2), online monitoring system in the self check process if any fault then system send warning; Non-fault in the detection, then system brings into operation, and uses the special optic fibre temperature sensor as system light signal to be provided by main, as is in operation, and is main with special optic fibre temperature sensor broken string, is that system provides light signal by subsequent use special optic fibre temperature sensor then;
(3), the light signal that fibre optic temperature sensor produces is changed, make it to become temperature signal, and carry out internal processes and be controlled at and form a Current Temperatures curve S 1 on the touch-screen through its inner analyser; (4), carrying out following three kinds of alarm analysis simultaneously according to Current Temperatures curve S 1 system judges:
1), when any some temperature on the Current Temperatures curve S 1 are higher than in the subregion maximum temperature alarming value and lasting 10S, system sends constant temperature and reports to the police;
2), temperature is greater than in the subregion when medial temperature T3 and lasting 3S, then system sends focus and reports to the police, and has the acousto-optic indication;
3), the every 1S of intrasystem temperature rise rate refreshes 1 time, when temperature rise rate during greater than temperature rise rate alarming value E, then system sends differential temperature and reports to the police, and has the acousto-optic indication;
(5), judge that in step (4) system carries out relevant detection to rotor in above-mentioned three kinds of warnings, rotor speed is less than the rotating speed alarming value, system sends stppage alarm, and has the acousto-optic indication.
The present invention has following beneficial effect:
1), adopt distributed special optic fibre temperature sensor to carry out temperature data acquisition, greatly reduce the scope in monitoring blind spot and dead band;
2), adopt the integrated control of specialized analyzer, Programmable Logic 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, improved the reliability of integrated alarm;
4), distributed temperature data acquisition precision＜0.1% of system, false alarm＜0.01%.
Description of drawings
Fig. 1 is the vertical view of air primary heater temperature optical fiber online monitoring system of the present invention;
Fig. 1 a partly cuts open figure for air primary heater temperature optical fiber online monitoring system of the present invention;
Fig. 2 is mounting bracket partial top view among the present invention;
Fig. 3 is switch board cut-away view among the present invention;
Fig. 4 is switch board panel synoptic diagram among the present invention;
Fig. 5 is preheating of air actuator temperature optical fiber online monitoring system steering logic figure.
Embodiment
Understand for technological means, technical characterictic, goal of the invention and the technique effect that the present invention is realized is easy to understand,, further set forth the present invention below in conjunction with concrete diagram.
Shown in Fig. 1 and Fig. 1 a: preheating of air actuator temperature optical fiber online monitoring system of the present invention comprises distributed optical fiber temperature sensor 3, mounting bracket 2, stppage alarm device and switch board 8; Said switch board 8 signals connect said distributed optical fiber temperature sensor 3, stppage alarm device; Mounting bracket 2 regions are secondary air side 32; What be adjacent is a wind side 31, fume side 33; Along radial direction 4 cover special optic fibre temperature sensors 3 are installed at said air preheater 1; Be installed in the inside of fibre optic temperature sensor erecting frame 2; With reference to figure 2, fibre optic temperature sensor erecting frame 2 is installed on the hot junction intermediate beam of air preheater, near the hot surface of rotor 14; Stppage alarm sensing chip clip 4 is installed on the rotor 14 of air preheater 1; Side at sensing chip clip 4 is equipped with near switch 5, and when rotor rotation, the sensing chip on the sensing chip clip 4 passes through near switch 5 successively; Make near switch 5, send pulse signal.
(1), online monitoring system powers on, after system powered on and finishes, system got into the self check state, carries out self check;
(2), online monitoring system in the self check process if any fault then system send warning; Non-fault in the detection, then system brings into operation, and uses the special optic fibre temperature sensor as system light signal to be provided by main, as is in operation, and is main with special optic fibre temperature sensor broken string, is that system provides light signal by subsequent use special optic fibre temperature sensor then;
(3), system changes the light signal that fibre optic temperature sensor produces through its inner analyser, makes it to become temperature signal, and carry out internal processes and be controlled at and form a Current Temperatures curve S 1 on the touch-screen;
(4), carrying out following three kinds of alarm analysis simultaneously according to Current Temperatures curve S 1 system judges:
1), when any some temperature on the Current Temperatures curve S 1 are higher than in the subregion maximum temperature alarming value and lasting 10S, system sends constant temperature and reports to the police;
2), temperature is greater than in the subregion when medial temperature T3 and lasting 3S, then system sends focus and reports to the police, and has the acousto-optic indication;
3), the every 1S of intrasystem temperature rise rate refreshes 1 time, when temperature rise rate during greater than temperature rise rate alarming value E, then system sends differential temperature and reports to the police, and has the acousto-optic indication;
(5), judge that in step (4) system carries out relevant detection to rotor in above-mentioned three kinds of warnings, rotor speed is less than the rotating speed alarming value, system sends stppage alarm, and has the acousto-optic indication.
Like Fig. 3 and shown in Figure 4: switch board 8 comprises switch board panel and inner member; The switch board panel is arranged on the cabinet door; Inner member is arranged at the inside of cabinet 9; Control panel is provided with touch-screen 6, indicator and analyser 7, and said touch-screen 6 peripheries are provided with the indicator, and said analyser 7 is located at the below of control panel; Touch-screen 6 mainly carries out real time monitoring to current air preheater 1 inner A, B side temperature; Operating personnel can observe the shape of temperature curve S1 through touch-screen 6; And can carry out necessary setting to temperature comparison base value; When warning or broken string phenomenon occurring, touch-screen 6 can carry out the light indication to it, notes to cause operating personnel; The indicator comprises broken string, stall, constant temperature, differential temperature, focus, power supply, operation, warning and noise elimination pilot lamp; Broken string, stall, constant temperature, differential temperature, focus same column are provided with; Power supply, operation, warning and noise elimination are provided with together, and are provided with switch in a side of noise elimination pilot lamp.
The inner member of switch board 8 comprises Programmable Logic Controller 10, auxiliary reclay 11, hummer 15, air switch 12 and connection terminal 13, signal transmission each other between Programmable Logic Controller 10, auxiliary reclay 11, hummer 15, air switch 12 and the connection terminal 13.
The present invention has used specialized analyzer 7; It can be changed the light signal that special optic fibre temperature sensor 3 produces; Make it to become temperature signal, and carry out internal processes control, and on touch-screen 6, form a Current Temperatures curve S 1; If any some temperature are higher than maximum temperature (constant temperature) alarming value T1 in the subregion on the curve, then send constant temperature and report to the police; If any any the temperature rise rate of Current Temperatures curve S 1 is higher than temperature rise rate (differential temperature) alarming value E in the subregion, then sends differential temperature and report to the police; If maximum temperature deducts the medial temperature on this curve S 1 on the Current Temperatures curve S 1, difference is then sent focus and is reported to the police greater than focus alarming value T3.Above-mentioned three kinds when report to the police taking place, system all delivers to central station of floating dock with alerting signal, is checked to the scene by operating personnel then, carries out the judgement of necessity and adopts an effective measure, with the generation of accident prevention.
Touch-screen 6 mainly is made up of following 6 interfaces:
1, welcome the interface:
This interface generates for the back of starting shooting automatically, and when showing the welcome interface, system begins to carry out inner self check work, gets into A/B side temperature monitoring interface after about 10 seconds automatically.
2, A side temperature front:
This interface display thes contents are as follows: medial temperature, constant temperature alarm lamp, differential temperature alarm lamp, focus alarm lamp, break alarm pilot lamp on temperature curve S1, maximum temperature (constant temperature) alarming value curve T1, temperature rise rate (differential temperature) alarming value E, the curve S 1, stppage alarm pilot lamp.
When the temperature value of any was higher than maximum temperature (constant temperature) alarming value T1 arbitrarily on the Current Temperatures curve S 1, the constant temperature alarm lamp became redness by green;
When the temperature rise rate of any was greater than temperature rise rate (differential temperature) alarming value E arbitrarily on the Current Temperatures curve S 1, the differential temperature alarm lamp became redness by green;
After arbitrarily the temperature value of any deducted the medial temperature on the curve S 1 on the Current Temperatures curve S 1, difference T2 was during greater than focus setting value T3, and the focus alarm lamp becomes redness by green;
When broken string takes place with the special optic fibre temperature sensor in the master; The master becomes redness with the break alarm pilot lamp by green; And automatically switch to subsequent use fibre optic temperature sensor, show subsequent use temperature curve simultaneously, and the break alarm pilot lamp on its next door becomes green by grey;
If operating personnel need inquire about the state of B side air preheater, can get into " B side temperature " interface by " B side temperature " button;
When if operating personnel need inquire about fault and the warning phenomenon of appearance, can get into " fault inquiry " interface by " fault inquiry " button;
When if operating personnel need set controlled variable, can get into " parameter setting " interface by " parameter setting " button;
When if operating personnel need check the air preheater rotating speed, can get into " rotating speed inquiry " interface by " rotating speed inquiry " button.
3, B side temperature front
The monitoring function of B side temperature front is identical with the A side.
4, set the interface
In setting the interface; Managerial personnel can reset and revise control parameter 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; Press enter key to confirm that above action need input password can carry out parameter setting.
5, fault inquiry interface
There are two windows at this interface:
(1) current warning
This window is used for showing the warning of current generation, and window right side " key up and down " can carry out the page turning inquiry.
(2) the historical warning
This window is used for showing the warning that takes place in the past, and window right side " key up and down " can carry out the page turning inquiry, has in the historical warning: time of fire alarming, alarm content, type of alarm.
6, rotating speed query interface
This interface can show the current tachometer value of air preheater that each three of A, B side monitor respectively near switch.
Have 11 pilot lamp on the switch board panel
" warning " lamp: when system no matter A, when any warning takes place in the B side, this pilot lamp will be lighted, and remind operating personnel, and a secondary dry contact signal conveys arranged to central station of floating dock;
" constant temperature " alarm lamp: when the temperature value of any was higher than maximum temperature (constant temperature) alarming value T1 arbitrarily on the Current Temperatures curve S 1, " constant temperature " alarm lamp was lighted;
" differential temperature " alarm lamp: when the temperature rise rate of any was greater than temperature rise rate (differential temperature) alarming value E arbitrarily on the Current Temperatures curve S 1, " differential temperature " alarm lamp was lighted;
" focus " alarm lamp: after arbitrarily the temperature value of any deducted the medial temperature on the curve S 1 on the Current Temperatures curve S 1, difference T2 was during greater than focus setting value T3, and " focus " alarm lamp is lighted;
" broken string " alarm lamp: when the master with the special optic fibre temperature sensor broken string took place, " broken string " alarm lamp was lighted;
" stall " alarm lamp: when the air preheater rotating speed was crossed low or stall, this pilot lamp was lighted;
" power supply " pilot lamp: when external power source was delivered to switch board, this pilot lamp was lighted;
The " RUN " pilot lamp: when the System self-test end, when bringing into operation, this pilot lamp is lighted;
" noise elimination " button: when total system detects any fault or reports to the police, all have acoustic alarm, press this button and can eliminate acoustic alarm this moment;
The stppage alarm device is by being contained in sensing chip clip 4 on the primary heater rotation axis, forming near switch 5; 20 sensing chips evenly are installed on the sensing chip clip 4, and when air preheater 1 rotated, 20 sensing chips passed through near switch 5 successively; Sensing chip clip 4 and produce pulse signal because of the gap changes near 5 on switch; Comparison is counted and calculated to Programmable Logic Controller 10 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, expression air preheater 1 rotates normal; When the number of pulses of receiving in the unit interval is lower than in advance the numerical value by the operate as normal speed setting; Perhaps exceed setting-up time and do not receive pulse signal, expression rotor 14 rotating speeds are crossed low or stall, and system sends alerting signal.
When starting working; Air switch 12 in the switch board 8 closes; And then the switch on switch board 8 panels that close is that package unit has powered on and brings into operation, and special optic fibre temperature sensor 3 is delivered to signal analyzer 7 with light signal, and signal analyzer 7 converts light signal to temperature value; And control according to internal processes, Programmable Logic Controller 10 judges according to the pulse signal that sends near switch 5 whether the rotating speed of the rotor 14 of air preheater 1 crosses low perhaps stall.
As shown in Figure 5, be preheating of air actuator temperature optical fiber online monitoring system steering logic figure, after the start; The interface appears welcoming in touch-screen 6; Begin self check simultaneously, self check through after begin to gather special optic fibre temperature sensor 3 signal calculate, and on touch-screen 6, in time show; If fault is arranged, the warning of touch-screen 6 and the demonstration of fault display interface also deposit historical record in.
Being merely preferred embodiment of the present invention in sum, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of claim of the present invention change and modification, all should belong to technological category of the present invention.
Claims (6)
1. preheating of air actuator temperature optical fiber online monitoring system; Comprise distributed optical fiber temperature sensor, mounting bracket, stppage alarm device and switch board; It is characterized in that: said switch board and said distributed optical fiber temperature sensor, rotor speed measuring device control linkage; Said air preheater is equipped with fibre optic temperature sensor along radial direction, and the stppage alarm device is installed on the rotor of said air preheater.
2. preheating of air actuator temperature optical fiber online monitoring system according to claim 1, it is characterized in that: said distributed optical fiber temperature sensor is a quadruplet, is installed in the inside of fibre optic temperature sensor erecting frame.
3. preheating of air actuator temperature optical fiber online monitoring system according to claim 1 and 2; It is characterized in that: said fibre optic temperature sensor erecting frame is installed on the hot junction intermediate beam of air preheater; Near the hot surface of rotor, said hot junction intermediate beam is arranged on the hot junction of air side.
4. preheating of air actuator temperature optical fiber online monitoring system according to claim 1 is characterized in that: said stppage alarm device comprises the sensing chip clip and near switch.
5. preheating of air actuator temperature optical fiber online monitoring system according to claim 1, it is characterized in that: said switch board comprises switch board panel and inner member, and said switch board panel is arranged on the cabinet door, and inner member is arranged at cabinet inside.
6. one kind is used the on-line monitoring method of preheating of air actuator temperature optical fiber online monitoring system according to claim 1, and it is characterized in that: its method for supervising comprises the steps:
(1), online monitoring system powers on, after system powered on and finishes, system got into the self check state, carries out self check;
(2), online monitoring system in the self check process if any fault then system send warning; Non-fault in the detection, then system brings into operation, and uses the special optic fibre temperature sensor as system light signal to be provided by main, as is in operation, and is main with special optic fibre temperature sensor broken string, is that system provides light signal by subsequent use special optic fibre temperature sensor then;
(3), system changes the light signal that fibre optic temperature sensor produces through its inner analyser, makes it to become temperature signal, and carry out internal processes and be controlled at and form a Current Temperatures curve S 1 on the touch-screen;
(4), carrying out following three kinds of alarm analysis simultaneously according to Current Temperatures curve S 1 system judges:
1), when any some temperature on the Current Temperatures curve S 1 are higher than in the subregion maximum temperature alarming value and lasting 10S, system sends constant temperature and reports to the police;
2), temperature is greater than in the subregion when medial temperature T3 and lasting 3S, then system sends focus and reports to the police, and has the acousto-optic indication;
3), the every 1S of intrasystem temperature rise rate refreshes 1 time, when temperature rise rate during greater than temperature rise rate alarming value E, then system sends differential temperature and reports to the police, and has the acousto-optic indication;
(5), judge that in step (4) system carries out relevant detection to rotor in above-mentioned three kinds of warnings, rotor speed is less than the rotating speed alarming value, system sends stppage alarm, and has the acousto-optic indication.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102823156A CN102393262A (en) | 2011-09-22 | 2011-09-22 | Air preheater optical fiber temperature on-line monitoring system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102823156A CN102393262A (en) | 2011-09-22 | 2011-09-22 | Air preheater optical fiber temperature on-line monitoring system and method |
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| CN102393262A true CN102393262A (en) | 2012-03-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110806268A (en) * | 2019-11-05 | 2020-02-18 | 国网山东省电力公司昌邑市供电公司 | Optical fiber temperature data processing and monitoring system |
| CN113670449A (en) * | 2021-08-23 | 2021-11-19 | 浙江兴核智拓科技有限公司 | Structure for measuring temperature of intermediate layer of heat storage element of air preheater on line |
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| US5097889A (en) * | 1991-01-11 | 1992-03-24 | Abb Air Preheater, Inc. | Hot spot detection and supression system |
| CN2655207Y (en) * | 2003-11-21 | 2004-11-10 | 上海市东方海事工程技术有限公司 | Temp monitoring alarm for air preheater |
| CN1570580A (en) * | 2003-07-17 | 2005-01-26 | 上海锅炉厂有限公司 | Thermocouple temperature monitoring method and system for air preheater |
| CN201707752U (en) * | 2010-05-24 | 2011-01-12 | 上海市东方海事工程技术有限公司 | Fire alarm device of air preheater |
| CN202229856U (en) * | 2011-09-22 | 2012-05-23 | 上海市东方海事工程技术有限公司 | Temperature fiber on-line monitoring system of air pre-heater |
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2011
- 2011-09-22 CN CN2011102823156A patent/CN102393262A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5097889A (en) * | 1991-01-11 | 1992-03-24 | Abb Air Preheater, Inc. | Hot spot detection and supression system |
| CN1570580A (en) * | 2003-07-17 | 2005-01-26 | 上海锅炉厂有限公司 | Thermocouple temperature monitoring method and system for air preheater |
| CN2655207Y (en) * | 2003-11-21 | 2004-11-10 | 上海市东方海事工程技术有限公司 | Temp monitoring alarm for air preheater |
| CN201707752U (en) * | 2010-05-24 | 2011-01-12 | 上海市东方海事工程技术有限公司 | Fire alarm device of air preheater |
| CN202229856U (en) * | 2011-09-22 | 2012-05-23 | 上海市东方海事工程技术有限公司 | Temperature fiber on-line monitoring system of air pre-heater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110806268A (en) * | 2019-11-05 | 2020-02-18 | 国网山东省电力公司昌邑市供电公司 | Optical fiber temperature data processing and monitoring system |
| CN113670449A (en) * | 2021-08-23 | 2021-11-19 | 浙江兴核智拓科技有限公司 | Structure for measuring temperature of intermediate layer of heat storage element of air preheater on line |
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Application publication date: 20120328 |