CN105651395A - Power station boiler air preheater hot spot detection system - Google Patents
Power station boiler air preheater hot spot detection system Download PDFInfo
- Publication number
- CN105651395A CN105651395A CN201610024685.2A CN201610024685A CN105651395A CN 105651395 A CN105651395 A CN 105651395A CN 201610024685 A CN201610024685 A CN 201610024685A CN 105651395 A CN105651395 A CN 105651395A
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- CN
- China
- Prior art keywords
- air preheater
- actuating mechanism
- mechanical actuating
- infrared sensor
- detection system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 238000005338 heat storage Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/05—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path
- G01J5/051—Means for preventing contamination of the components of the optical system; Means for preventing obstruction of the radiation path using a gas purge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
A power station boiler air preheater hot spot detection system comprises an electric control device, a temperature measuring device and a mechanical execution mechanism. The electric control device is internally provided with a central control room. The temperature measuring device comprises a thermocouple and an infrared sensor. The mechanical execution mechanism is installed on the lower end of an air preheater. The mechanical execution mechanism is provided with a dolly. The infrared sensor is installed on the dolly. The infrared sensor moves back and forth under the driving of the mechanical execution mechanism. A water inlet and outlet pipe is arranged on the lower end of the mechanical execution mechanism. An infrared probe and the thermocouple detect the change of a temperature field in the air preheater in real time. The infrared probe moves back and forth under the driving of the mechanical execution mechanism so as to match the rotation of a rotor of the air preheater, and the heated surface of a heat storage member of the whole rotor can be scanned, so that the distribution of the temperature field in the rotor is obtained.
Description
Technical field
The present invention relates to electrical equipment, especially a kind of power station boiler air pre-heater hot spot detection system.
Background technology
Power station boiler air pre-heater (hereinafter referred to as air preheater) is the heat exchanger utilizing the smoke discharging residual heat of boiler to add hot-air. Air preheater makes the air themperature that boiler combustion and pulverized coal preparation system need be improved, and reduces exhaust gas temperature simultaneously further, reduces heat loss due to exhaust gas. Current domestic more than 200MW unit boiler generally adopts compact conformation, lighter in weight, saving place, arranges convenient rotary regenerative air heater. But when combustible (including carbon black and oil droplet) the oxidized intensification gathered on air preheater heating surface, reach ignition temperature and may result in the pyrophoricity accident of air preheater itself. Air preheater burning has two conditions: contain combustible on heating surface; Air in air preheater, flue gas flow rate are low or uneven, cause that radiating condition is deteriorated. When the oil gas not having burning or partially combusted fuel, particularly atomization badness condenses upon on the heat transfer component of air preheater, when temperature is increased to about 350 DEG C, deposit can be dried and be lighted. Owing to catching fire, initial stage scope is less, is difficult to be found, and when component temperature continues to rise to 700 DEG C, is just enough to cause that steel heat accumulating element and whole air preheater are on fire, thus affecting the properly functioning of whole unit. This burning is referred to as burn again (also known as the second-time burning) of air preheater. This type of accident in recent years at home the power plant such as shimen Hunan power plant, Zhanjiang power plant, Sha Jiao power plant all successively occurred. Air preheater occurs to burn again, and to cause fire be a slow evolution, it to experience the oxidation reaction of carbon black and oil droplet to spontaneous combustion, spreads to adjacent corrugated plate case from the burning of a corrugated boxes, and constantly expanding such a process, this process generally requires several hours. Showing according to some external researchs and test, occur spontaneous combustion at least to need 60��90min to spreading to whole corrugated boxes from a certain position, the time needed for extending to adjacent corrugated plate case from a corrugated boxes is then longer, takes around 3��4h. As can be seen here, as long as accurate judgement can be made air preheater occurs and burns early stage, and adopting an effective measure in time, the air preheater fire damage caused of burning again can control in not half.Therefore, it is necessary to adopt the detection device that catches fire, take effective fire prevention measure ahead of time.
The improvement that the present invention is contemplated to solve problem above and carries out.
Summary of the invention
It is an object of the invention to provide a kind of infrared probe and thermocouple detects the change of air preheater internal temperature field in real time, coordinating the rotation of preheater rotor, it is possible to scan whole rotor heat accumulating element heating surface, thus obtaining the thermo parameters method of internal rotor; Blow device can purge infrared sensor according to the Automatic Program arranged in advance, it is ensured that as far as possible accurately, the temperature detection reducing mistake improves work efficiency to the temperature that infrared sensor detects; It is provided with alarm device in main program-control cabinet, it may be judged whether have the condition of a fire to occur, reduces the generation of fire incident.
The present invention solves that its technical problem be the technical scheme is that
A kind of power station boiler air pre-heater hot spot detection system, including electric control gear, temperature measuring equipment and mechanical actuating mechanism, is provided with central station of floating dock in electric control gear; Temperature measuring equipment includes thermocouple and infrared sensor; The lower end of air preheater is provided with mechanical actuating mechanism, and mechanical actuating mechanism is provided with dolly, and dolly is provided with infrared sensor, and infrared sensor moves reciprocatingly under the driving of mechanical actuating mechanism, and mechanical actuating mechanism lower end is provided with water inlet pipe and water outlet pipe;
Further, the upper end of air preheater is provided with thermocouple, air preheater be internally provided with mechanical actuating mechanism, the side of air preheater is provided with electric control gear;
Concrete, it being provided with guide rail, running roller, chain and blow device in mechanical actuating mechanism, running roller is positioned at the lower end of guide rail, and dolly is positioned on guide rail, and chain is connected with the two ends of dolly respectively by running roller, and blow device is positioned at the upper end of infrared sensor;
Wherein, including main program-control cabinet and control box in central station of floating dock, be provided with alarm device in main program-control cabinet, main program-control cabinet is connected with control box and thermocouple respectively, being provided with drive motor between control box and mechanical actuating mechanism, control box is connected with the running roller in mechanical actuating mechanism by drive motor.
Infrared sensor is provided with two.
Control box is provided with two.
It is an advantage of the current invention that:
1. infrared probe and thermocouple detect the change of air preheater internal temperature field in real time, infrared probe is driven reciprocal motion by actuator, coordinate the rotation of preheater rotor, it is possible to scan whole rotor heat accumulating element heating surface, thus obtaining the thermo parameters method of internal rotor.
2. blow device can purge infrared sensor according to the Automatic Program arranged in advance, it is ensured that as far as possible accurately, the temperature detection reducing mistake improves work efficiency to the temperature that infrared sensor detects.
3. being provided with alarm device in main program-control cabinet, the temperature value measured compared with the alarm threshold value set in advance, thus determining whether that the condition of a fire occurs, is reduced the generation of fire incident by temperature measuring equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of power station boiler air pre-heater hot spot detection system that the present invention proposes.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with diagram and specific embodiment, the present invention is expanded on further.
With reference to shown in Fig. 1, this one power station boiler air pre-heater hot spot detects system, including electric control gear, temperature measuring equipment and mechanical actuating mechanism, is provided with central station of floating dock in electric control gear; Temperature measuring equipment includes thermocouple 3 and infrared sensor 4;The lower end of air preheater is provided with mechanical actuating mechanism, mechanical actuating mechanism is provided with dolly 9, being provided with infrared sensor 4 on dolly 9, infrared sensor 4 moves reciprocatingly under the driving of mechanical actuating mechanism, and mechanical actuating mechanism lower end is provided with water inlet pipe and water outlet pipe 10;
Further, the upper end of air preheater is provided with thermocouple 3, air preheater be internally provided with mechanical actuating mechanism, the side of air preheater is provided with electric control gear;
Being provided with guide rail 5, running roller 6, chain 7 and blow device 8 in mechanical actuating mechanism, running roller 6 is positioned at the lower end of guide rail 5, and dolly 9 is positioned on guide rail 5, and chain 7 is connected with the two ends of dolly 9 respectively by running roller 6, and blow device 8 is positioned at the upper end of infrared sensor 4;
Concrete, main program-control cabinet 1 and control box 2 is included in central station of floating dock, it is provided with alarm device in main program-control cabinet 1, main program-control cabinet 1 is connected with control box 2 and thermocouple 3 respectively, being provided with drive motor 11 between control box 2 and mechanical actuating mechanism, control box 2 is connected with the running roller 6 in mechanical actuating mechanism by drive motor 11;
Infrared sensor 4 is provided with two;
Control box 2 is provided with two.
Infrared probe and thermocouple detect the change of air preheater internal temperature field in real time, infrared probe is driven reciprocal motion by actuator, coordinate the rotation of preheater rotor, it is possible to scan whole rotor heat accumulating element heating surface, thus obtaining the thermo parameters method of internal rotor; Blow device can purge infrared sensor according to the Automatic Program arranged in advance, it is ensured that as far as possible accurately, the temperature detection reducing mistake improves work efficiency to the temperature that infrared sensor detects; Being provided with alarm device in main program-control cabinet, the temperature value measured compared with the alarm threshold value set in advance, thus determining whether that the condition of a fire occurs, is reduced the generation of fire incident by temperature measuring equipment.
The ultimate principle of the present invention, principal character and advantages of the present invention have more than been shown and described. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements both fall within the claimed scope of the invention. Claimed scope is defined by appending claims and equivalent thereof.
Claims (6)
1. a power station boiler air pre-heater hot spot detection system, including electric control gear, temperature measuring equipment and mechanical actuating mechanism, it is characterised in that be provided with central station of floating dock in electric control gear; Temperature measuring equipment includes thermocouple (3) and infrared sensor (4); The lower end of air preheater is provided with mechanical actuating mechanism, mechanical actuating mechanism is provided with dolly (9), dolly (9) is provided with infrared sensor (4), infrared sensor (4) moves reciprocatingly under the driving of mechanical actuating mechanism, and mechanical actuating mechanism lower end is provided with water inlet pipe and water outlet pipe (10).
2. a kind of power station boiler air pre-heater hot spot detection system according to claim 1, it is characterized in that, the upper end of air preheater is provided with thermocouple (3), air preheater be internally provided with mechanical actuating mechanism, the side of air preheater is provided with electric control gear.
3. a kind of power station boiler air pre-heater hot spot detection system according to claim 1, it is characterized in that, guide rail (5), running roller (6), chain (7) and blow device (8) it is provided with in mechanical actuating mechanism, running roller (6) is positioned at the lower end of guide rail (5), dolly (9) is positioned on guide rail (5), chain (7) is connected with the two ends of dolly (9) respectively by running roller (6), and blow device (8) is positioned at the upper end of infrared sensor (4).
4. a kind of power station boiler air pre-heater hot spot detection system according to claim 1 and 2, it is characterized in that, main program-control cabinet (1) and control box (2) is included in central station of floating dock, main program-control cabinet is provided with alarm device in (1), main program-control cabinet (1) is connected with control box (2) and thermocouple (3) respectively, being provided with drive motor (11) between control box (2) and mechanical actuating mechanism, control box (2) is connected with the running roller (6) in mechanical actuating mechanism by drive motor (11).
5. a kind of power station boiler air pre-heater hot spot detection system according to claim 1 or 3, it is characterised in that infrared sensor (4) is provided with two.
6. a kind of power station boiler air pre-heater hot spot detection system according to claim 1 or 4, it is characterised in that control box (2) is provided with two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024685.2A CN105651395A (en) | 2016-01-14 | 2016-01-14 | Power station boiler air preheater hot spot detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610024685.2A CN105651395A (en) | 2016-01-14 | 2016-01-14 | Power station boiler air preheater hot spot detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105651395A true CN105651395A (en) | 2016-06-08 |
Family
ID=56486663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610024685.2A Pending CN105651395A (en) | 2016-01-14 | 2016-01-14 | Power station boiler air preheater hot spot detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105651395A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917761A (en) * | 2017-11-17 | 2018-04-17 | 航天科工哈尔滨风华有限公司电站设备分公司 | A kind of infrared heat point detection device |
| 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 |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5242224A (en) * | 1991-01-18 | 1993-09-07 | Mitsubishi Jukogyo Kabushiki Kaisha | Temperature monitoring unit |
| CN101118189A (en) * | 2007-09-07 | 2008-02-06 | 西安理工大学 | Station boiler air pre-heater hot point testing apparatus based on superioinferior position structure |
-
2016
- 2016-01-14 CN CN201610024685.2A patent/CN105651395A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5242224A (en) * | 1991-01-18 | 1993-09-07 | Mitsubishi Jukogyo Kabushiki Kaisha | Temperature monitoring unit |
| CN101118189A (en) * | 2007-09-07 | 2008-02-06 | 西安理工大学 | Station boiler air pre-heater hot point testing apparatus based on superioinferior position structure |
Non-Patent Citations (1)
| Title |
|---|
| 刘涵等: "施耐德电气Quantum PLC在空气预器热点检测系统中的应用", 《制造业自动化》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917761A (en) * | 2017-11-17 | 2018-04-17 | 航天科工哈尔滨风华有限公司电站设备分公司 | A kind of infrared heat point detection device |
| 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 |
| CN112433551B (en) * | 2020-11-03 | 2022-03-22 | 北方魏家峁煤电有限责任公司 | Air preheater warning system, method and computer readable medium |
| 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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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160608 |
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| RJ01 | Rejection of invention patent application after publication |