CN109340732B - Boiler internal flue gas temperature detection device - Google Patents
Boiler internal flue gas temperature detection device Download PDFInfo
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- CN109340732B CN109340732B CN201811142576.6A CN201811142576A CN109340732B CN 109340732 B CN109340732 B CN 109340732B CN 201811142576 A CN201811142576 A CN 201811142576A CN 109340732 B CN109340732 B CN 109340732B
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- Prior art keywords
- flue
- temperature
- boiler
- fixing rod
- detection device
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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
- F22B37/38—Determining or indicating operating conditions in steam boilers, e.g. monitoring direction or rate of water flow through water tubes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
Abstract
The invention discloses a device for detecting the temperature of flue gas in a boiler, which relates to the technical field of boiler detection, and adopts the technical scheme that: including the flue, be provided with many dead levers in the flue, many dead lever evenly distributed is in the cross section of flue, be provided with a plurality of thermodetector along its length direction on the dead lever, thermodetector passes through the wire and links to each other with external data acquisition system, every thermodetector quantity on the dead lever is six at least. By arranging the fixed rod and the plurality of temperature detectors, the smoke temperature in the flue at different heights and in different width ranges can be detected in all directions; the temperature detection device can output more accurate and richer exhaust gas temperature data for an external analysis system to analyze, thereby accurately obtaining the running state of the boiler and having better promotion effect on the safety and control of the whole boiler; this temperature-detecting device can also clean temperature detector.
Description
Technical Field
The invention relates to the technical field of boiler detection, in particular to a device for detecting the temperature of smoke in a boiler.
Background
When the waste heat boiler is in operation, the exhaust gas temperature is influenced by the flow velocity of the exhaust gas and the space size of the flue, and a temperature field structure is actually formed. In data acquisition such as combustion adjustment, water supply control, flue gas environmental protection detection, the exhaust gas temperature can often be utilized, so if the exhaust gas temperature can be accurately, conveniently and economically acquired, the safety and the control of the whole boiler are both beneficial.
As shown in fig. 1, an existing device for detecting the temperature of flue gas in a boiler comprises a flue 1, wherein a plurality of thermometers 9 are arranged on the inner wall of the flue 1, and the thermometers 9 are respectively located at the upper, middle and lower positions of the flue 1.
The above prior art solutions have the following drawbacks: the thermometer for field measurement is influenced by design and structure, only the temperature of a flue within 0.5-1 m can be measured, the actual temperature of actual large-space exhaust smoke of a boiler cannot be detected, the number of the thermometers is too small, collected temperature data are too dispersed, and analysis and application of the temperature data are difficult.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for detecting the temperature of flue gas in a boiler, which can detect the temperature of flue gas in a large space of an actual boiler, has more collection points and is beneficial to analysis and application of temperature data.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides an inside flue gas temperature-detecting device of boiler, includes the flue, be provided with many dead levers, many in the flue dead lever evenly distributed is in the cross section of flue, be provided with a plurality of thermodetector along its length direction on the dead lever, thermodetector passes through the wire and links to each other with external data acquisition system, every thermodetector quantity on the dead lever is six at least.
Through the technical scheme, the smoke temperature detection device can detect the smoke temperature in different heights and width ranges in the flue in an all-around manner by arranging the plurality of groups of temperature detectors, wherein the number of each group of temperature detectors is at least six. The temperature detection device can output more accurate and richer smoke exhaust temperature data for an external analysis system to analyze, thereby accurately obtaining the running state of the boiler and having better promotion effect on the safety and control of the whole boiler.
Preferably, the device further comprises a chimney communicated with the flue, the length direction of the flue is along the horizontal direction, and the length direction of the chimney is along the vertical direction.
Through the technical scheme, the chimney is used for collecting the flue gas of the flue and discharging the flue gas to the high altitude, so that the pollution to low-level air is reduced.
Preferably, the chimney is provided with an observation device facing the flue, and the temperature detector can be observed through the observation device.
Through above-mentioned technical scheme, observation device is convenient for personnel to inspect thermodetector's operating condition, for example whether thermodetector's pilot lamp is often bright to judge whether thermodetector is in normal operating condition.
Preferably, a heat insulation plate is arranged between the temperature detector and the fixing rod.
Through the technical scheme, the heat insulation plate can reduce the influence of the temperature at the fixed rod on the temperature detector, so that the measurement precision of the temperature detector is improved.
Preferably, the fixing rod is arranged in the flue in a sliding mode along the axial direction of the fixing rod, a driving mechanism for driving the fixing rod to slide is arranged on the flue, the driving mechanism can drive the fixing rod to slide out of the flue, and a carbon removing brush in contact with the temperature detector is arranged outside the flue.
Through the technical scheme, the temperature detector is contacted with smoke dust in the flue for a long time, so that the surface of the temperature detector is easy to deposit dust and carbon, and the measurement accuracy of the temperature detector is influenced. Personnel can regularly start actuating mechanism, makes the dead lever roll-off flue, and at this in-process, the carbon removal brush brushes the surface of thermodetector, removes dust and carbon for thermodetector.
Preferably, the flue is provided with a penetration port through which the fixing rod and the temperature detector extend out of the flue, and the fixing rod is fixed with a sealing plate for sealing the penetration port; and when all the temperature detectors enter the flue, the outlet is sealed by the sealing plate.
Through above-mentioned technical scheme, the shape of shrouding corresponds with the penetrator, and when the dead lever slided to lower dead center to the flue direction, thereby the shrouding was sealed with the oral area counterbalance of penetrator, and the smoke and dust in the flue can not leak through the penetrator.
Preferably, the carbon removing brush is rotatably arranged on the flue, a sliding block is slidably arranged on the carbon removing brush, a driving piece is arranged between the fixed rod and the carbon removing brush, and two ends of the driving piece are respectively hinged with the fixed rod and the sliding block; when the fixed rod slides out of the flue, the fixed rod pulls the carbon removal brush to rotate through the driving piece and the sliding block, so that the carbon removal brush rotates from a state of being tightly attached to the flue to a state of being capable of contacting with the temperature detector.
Through the technical scheme, when the fixed rod moves upwards, the fixed rod pulls the sliding block through the driving piece, the sliding block slides under the action of the oblique tension of the driving piece and pulls the carbon removing brush at the same time, so that the carbon removing brush gradually rotates from a state of being tightly attached to the flue to a vertical state; after the carbon removing brush finishes cleaning the temperature detector, the personnel control the fixed rod to move downwards, and meanwhile, the carbon removing brush rotates to be in a horizontal state to finish resetting. On one hand, the carbon removal brush in the horizontal state cannot cause excessive resistance to air flow, and the connecting part of the carbon removal brush is not easily damaged by wind power; on the other hand, rain water and wind energy are fully contacted with the brush hair, so that the brush hair contaminated by carbon dust is washed and blown away, and the carbon removal brush has good self-cleaning performance.
Preferably, the driving member is a pneumatic rod.
According to the technical scheme, in the rotating process of the carbon removing brush, the air pressure rod generates self-adaptive expansion under the action of the air pressure set by the air pressure rod, and when the carbon removing brush is in a state close to the horizontal state, the axial component force of the sliding block acting on the air pressure rod is large, and the air pressure rod is enabled to extend, so that the carbon removing brush can be completely horizontal; when the carbon removing brush is in a state close to the vertical state, the axial component force of the sliding block acting on the air pressure rod is small, the air pressure rod is shortened, the carbon removing brush can be in a completely vertical state, and the carbon removing brush can be reliably contacted with the temperature detector.
Preferably, a fixing sleeve is rotatably arranged outside the fixing rod, and the temperature detector is positioned on the fixing sleeve; the flue is provided with a guide block, the fixing sleeve is axially provided with a guide groove for the guide block to be embedded into the fixing sleeve in a sliding manner, and the guide groove is wavy and curved.
Through above-mentioned technical scheme, when dead lever drive fixed cover slided in the vertical direction, because the limiting displacement of guide block and guide way, fixed cover can make a round trip to rotate around its axis, has further improved the clean effect of brush hair to thermodetector.
In summary, compared with the prior art, the beneficial effects of the invention are as follows:
1. by arranging the fixed rod and the plurality of temperature detectors, the smoke temperature in the flue at different heights and in different width ranges can be detected in all directions;
2. the temperature detector can be cleaned by arranging the carbon removing brush and the driving mechanism;
3. the carbon removing brush can automatically rotate and has good self-cleaning performance.
Drawings
FIG. 1 is a schematic diagram of a conventional device for detecting the temperature of flue gas in a boiler;
FIG. 2 is a perspective view of the boiler interior flue gas temperature detection apparatus of the embodiment, mainly highlighting the structure of the chimney and the observation device;
FIG. 3 is an internal structural view of the embodiment, mainly highlighting the structure of the temperature detector and the drive mechanism;
fig. 4 is a structural view of the fixing cover of the embodiment, mainly highlighting the structure of the guide block and the guide groove;
FIG. 5 is a schematic view of the embodiment except that the carbon brush is in contact with the temperature detector.
In the figure, 9, a thermometer; 1. a flue; 10. a chimney; 2. fixing the rod; 3. a drive mechanism; 4. a temperature detector; 11. a penetration port; 21. mounting a rod; 31. a motor; 32. a screw; 33. a drive plate; 34. a guide bar; 22. closing the plate; 23. fixing a sleeve; 231. a connecting member; 232. a heat insulating plate; 12. a guide block; 233. a guide groove; 5. removing the carbon brush; 51. a chute; 52. a slider; 53. brushing; 54. a drive member; 101. and (4) observing the device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 2 and 3, the device for detecting the temperature of flue gas in a boiler disclosed by the invention comprises a flue 1 and a chimney 10 which are communicated with each other, wherein the length of the flue 1 is along the horizontal direction, and the length of the chimney 10 is along the vertical direction. A plurality of fixed rods 2 are arranged in the flue 1 in a sliding manner, and a driving mechanism 3 for driving the fixed rods 2 to slide is arranged outside the flue 1; a plurality of temperature detectors 4 are arranged on the fixed rod 2 along the length direction of the fixed rod, and the temperature detectors 4 are connected with an external data acquisition system through leads.
The axis of dead lever 2 all follows vertical direction, and evenly distributed in the cross section of flue 1, and many dead levers 2 are fixed through setting up installation pole 21 an organic whole between them, and dead lever 2 can follow vertical direction roll-off flue 1 that makes progress, offers on the top surface of flue 1 to supply dead lever 2 to stretch out the outlet 11 that wears of flue 1. The driving mechanism 3 comprises a motor 31, a screw 32 coaxially fixed at the output end of the motor 31, and a driving plate 33 in threaded connection with the screw 32, wherein the driving plate 33 is fixedly connected with all the fixing rods 2, the driving plate 33 is in sliding connection with the flue 1 through a guide rod 34 fixed on the flue 1, and the axis of the screw 32 is along the vertical direction. When the motor 31 runs, the motor 31 drives the screw rod 32 to rotate, the screw rod 32 drives the driving plate 33 to slide under the effect of threaded connection with the driving plate 33, and the driving plate 33 drives all the fixing rods 2 to move together.
Referring to fig. 3 and 4, a guide block 12 is fixed on the flue 1 at the through hole 11, the guide block 12 faces the fixing sleeve 23, a guide groove 233 for the guide block 12 to be embedded and slide is formed in the fixing sleeve 23, and the guide groove 233 extends along the length direction of the fixing sleeve 23 and is bent in a wave shape. When the fixing rod 2 drives the fixing sleeve 23 to slide in the vertical direction, the fixing sleeve 23 can rotate back and forth around the axis thereof due to the limiting effect of the guide block 12 and the guide groove 233.
Referring to fig. 3 and 5, the outer top wall of the flue 1 is rotatably provided with a carbon brush 5, the carbon brush 5 is rectangular, the carbon brush 5 is hinged to the flue 1 through one side edge, under normal conditions, except for a state that the carbon brush 5 is horizontally arranged on the flue 1, the top surface of the carbon brush 5 is provided with two sliding grooves 51, and the parts outside the sliding grooves 51 are uniformly provided with bristles 53, wherein the sliding grooves 51 face the fixed rod 2 in the length direction, the sliding grooves 51 are T-shaped grooves, sliding blocks 52 matched with the sliding grooves 51 are arranged in the sliding grooves 51 in a sliding manner, and the sliding blocks 52 cannot be separated from the sliding grooves 51. Two driving members 54 are arranged between the fixing rod 2 and the carbon removing brush 5, the driving members 54 in the embodiment are pneumatic rods, one end of each driving member 54 is hinged with the end part of the mounting rod 21, the other end of each driving member 54 is hinged with the sliding block 52, and the axial directions of the two driving members 54 are parallel to each other.
When the fixing rod 2 moves upwards, the fixing rod 2 pulls the sliding block 52 through the mounting rod 21 and the driving part 54, the sliding block 52 slides along the sliding groove 51 under the oblique pulling force of the driving part 54, and simultaneously pulls the carbon removing brush 5, so that the carbon removing brush 5 gradually rotates from a state of being tightly attached to the flue 1 to a vertical state. When the carbon removing brush 5 rotates, the air pressure rod generates self-adaptive expansion under the action of the air pressure set by the air pressure rod, and when the carbon removing brush 5 is in a state close to the horizontal state, the sliding block 52 has larger component force acting on the air pressure rod in the axial direction and promotes the air pressure rod to extend, so that the carbon removing brush 5 can be completely horizontal; when the carbon removing brush 5 is in a state close to vertical, the axial component force of the slide block 52 acting on the air pressure rod is small, and the air pressure rod is shortened, so that the carbon removing brush 5 can be in a completely vertical state.
Referring to fig. 2, a hole facing the flue 1 is formed in the chimney 10, an observation device 101 for sealing the hole is arranged on the chimney, and the observation device 101 is in threaded connection with the chimney 10; when the observer 101 is removed from the chimney 10, the temperature detector 4 can be observed through the hole. The observation device 101 is convenient for a person to check whether the indicator light of the temperature detector 4 is normally on to judge whether the temperature detector 4 is in a normal working state.
In summary, the present invention can detect the flue gas temperature in the flue 1 in all directions by arranging a plurality of groups of temperature detectors 4, wherein each group of temperature detectors 4 has six number, and the flue gas temperature in different height and width ranges can be detected in all directions. The temperature detection device can output more accurate and richer smoke exhaust temperature data for an external analysis system to analyze, thereby accurately obtaining the running state of the boiler and having better promotion effect on the safety and control of the whole boiler.
Since the temperature detector 4 is in contact with the smoke in the flue 1 for a long time, the surface of the temperature detector 4 is easy to deposit dust and carbon, which affects the measurement accuracy of the temperature detector 4. The person can start the motor 31 regularly, and the motor 31 drives the fixing rod 2 to move upwards; during the moving process of the fixed rod 2, the temperature detector 4 gradually moves to the upper part of the flue 1 through the through hole 11, and meanwhile, the carbon brush 5 rotates to the vertical state. In the process, the brush bristles 53 brush the surface of the temperature detector 4 to remove dust and carbon from the temperature detector 4, and the temperature detector 4 also rotates back and forth under the action of the guide block 12 and the guide groove 233, so that the cleaning effect of the brush bristles 53 on the temperature detector 4 is further improved.
After the carbon removing brush 5 finishes cleaning the temperature detector 4, the personnel control the motor 31 to rotate reversely, and then the fixing rod 2 moves downwards, and the carbon removing brush 5 rotates to a horizontal state to finish resetting. On one hand, the carbon removal brush 5 in the horizontal state cannot cause excessive resistance to air flow, and the connecting part of the carbon removal brush 5 is not easily damaged by wind power; on the other hand, the rain water and the wind energy are fully contacted with the brush bristles 53, so that the brush bristles 53 stained with carbon dust are washed and blown away, and the carbon brush 5 has good self-cleaning performance.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (7)
1. The utility model provides an inside flue gas temperature detection device of boiler, includes flue (1), characterized by: a plurality of fixing rods (2) are arranged in the flue (1), the fixing rods (2) are uniformly distributed in the cross section of the flue (1), a plurality of temperature detectors (4) are arranged on the fixing rods (2) along the length direction of the fixing rods, the temperature detectors (4) are connected with an external data acquisition system through wires, and the number of the temperature detectors (4) on each fixing rod (2) is at least six;
the fixing rod (2) is arranged in the flue (1) in a sliding mode along the axial direction of the fixing rod, a driving mechanism (3) for driving the fixing rod (2) to slide is arranged on the flue (1), the driving mechanism (3) can drive the fixing rod (2) to slide out of the flue (1), and a carbon brush (5) which is in contact with the temperature detector (4) is arranged outside the flue (1).
2. The boiler interior flue gas temperature detection device according to claim 1, characterized in that: the novel flue gas purification device is characterized by further comprising a chimney (10) communicated with the flue (1), wherein the length direction of the flue (1) is along the horizontal direction, and the length direction of the chimney (10) is along the vertical direction.
3. The boiler interior flue gas temperature detection device according to claim 2, characterized in that: an observation device (101) which is right opposite to the flue (1) is arranged on the chimney (10), and the temperature detector (4) can be observed through the observation device (101).
4. The boiler interior flue gas temperature detection device according to claim 1, characterized in that: and a heat insulation plate (232) is arranged between the temperature detector (4) and the fixing rod (2).
5. The boiler interior flue gas temperature detection device according to claim 1, characterized in that: the flue (1) is provided with a through hole (11) for the fixing rod (2) and the temperature detector (4) to extend out of the flue (1), and the fixing rod (2) is fixed with a sealing plate (22) for sealing the through hole (11); when all the temperature detectors (4) enter the flue (1), the outlet (11) is sealed by the sealing plate (22).
6. The boiler interior flue gas temperature detection device according to claim 1, characterized in that: the carbon removing brush (5) is rotatably arranged on the flue (1), a sliding block (52) is arranged on the carbon removing brush (5) in a sliding manner, a driving piece (54) is arranged between the fixed rod (2) and the carbon removing brush (5), and two ends of the driving piece (54) are respectively hinged with the fixed rod (2) and the sliding block (52); when the fixing rod (2) slides out of the flue (1), the fixing rod (2) pulls the carbon removing brush (5) to rotate through the driving piece (54) and the sliding block (52), so that the carbon removing brush (5) rotates from a state of being tightly attached to the flue (1) to a state of being capable of being in contact with the temperature detector (4).
7. The boiler interior flue gas temperature detection device according to claim 6, wherein: the driving member (54) is a pneumatic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811142576.6A CN109340732B (en) | 2018-09-28 | 2018-09-28 | Boiler internal flue gas temperature detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811142576.6A CN109340732B (en) | 2018-09-28 | 2018-09-28 | Boiler internal flue gas temperature detection device |
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| Publication Number | Publication Date |
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| CN109340732A CN109340732A (en) | 2019-02-15 |
| CN109340732B true CN109340732B (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811142576.6A Active CN109340732B (en) | 2018-09-28 | 2018-09-28 | Boiler internal flue gas temperature detection device |
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Citations (7)
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| JPH11262117A (en) * | 1998-03-13 | 1999-09-24 | Tokyo Metropolis | Board temperature monitoring method and equipment |
| CN2572387Y (en) * | 2002-09-30 | 2003-09-10 | 陕西开源电子科技有限责任公司 | Windmill type multi-point fly ash equal speed sampler for microwave carbon detector |
| WO2012145829A1 (en) * | 2011-04-26 | 2012-11-01 | Tenova Goodfellow Inc. | Method and apparatus for high temperature gas flow velocity sensing |
| CN104849108A (en) * | 2015-05-18 | 2015-08-19 | 苏靖 | Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content |
| CN105371973A (en) * | 2015-12-08 | 2016-03-02 | 西安西热电站信息技术有限公司 | Multi-point three-dimensional measurement-based boiler outlet smoke temperature real-time measuring method |
| WO2016137762A1 (en) * | 2015-02-24 | 2016-09-01 | Alstom Technology Ltd | A gas outlet monitoring system |
| CN106248443A (en) * | 2016-08-25 | 2016-12-21 | 邢红涛 | A kind of combustion zone smoke components measures sampler |
-
2018
- 2018-09-28 CN CN201811142576.6A patent/CN109340732B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11262117A (en) * | 1998-03-13 | 1999-09-24 | Tokyo Metropolis | Board temperature monitoring method and equipment |
| CN2572387Y (en) * | 2002-09-30 | 2003-09-10 | 陕西开源电子科技有限责任公司 | Windmill type multi-point fly ash equal speed sampler for microwave carbon detector |
| WO2012145829A1 (en) * | 2011-04-26 | 2012-11-01 | Tenova Goodfellow Inc. | Method and apparatus for high temperature gas flow velocity sensing |
| WO2016137762A1 (en) * | 2015-02-24 | 2016-09-01 | Alstom Technology Ltd | A gas outlet monitoring system |
| CN104849108A (en) * | 2015-05-18 | 2015-08-19 | 苏靖 | Gas-exhaust-type online monitoring method and gas-exhaust-type online monitoring device for oxygen content |
| CN105371973A (en) * | 2015-12-08 | 2016-03-02 | 西安西热电站信息技术有限公司 | Multi-point three-dimensional measurement-based boiler outlet smoke temperature real-time measuring method |
| CN106248443A (en) * | 2016-08-25 | 2016-12-21 | 邢红涛 | A kind of combustion zone smoke components measures sampler |
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