CN117310072A - Continuous on-line monitoring device for boiler combustion efficiency - Google Patents
Continuous on-line monitoring device for boiler combustion efficiency Download PDFInfo
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- CN117310072A CN117310072A CN202110448789.7A CN202110448789A CN117310072A CN 117310072 A CN117310072 A CN 117310072A CN 202110448789 A CN202110448789 A CN 202110448789A CN 117310072 A CN117310072 A CN 117310072A
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- China
- Prior art keywords
- flue gas
- heating device
- boiler
- combustion efficiency
- continuous
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- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 35
- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000003546 flue gas Substances 0.000 claims abstract description 87
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 12
- 239000003245 coal Substances 0.000 abstract description 9
- 238000010248 power generation Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 239000010881 fly ash Substances 0.000 description 11
- 238000001514 detection method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/005—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods investigating the presence of an element by oxidation
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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
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Combustion & Propulsion (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The utility model provides a continuous on-line monitoring device of boiler combustion efficiency, including casing (1), be equipped with flue gas passageway (2) in casing (1), the entrance of flue gas passageway (2) is equipped with entrance oxygen concentration detector (4), be equipped with flue gas heating device (5) on flue gas passageway (2), combustible material in flue gas heating device (5) can be with the flue gas in flue gas passageway (2) heats to the temperature above the fire point, the rear that is located flue gas heating device (5) on flue gas passageway (2) is equipped with exit section oxygen concentration detector (7), the time that flue gas flows to exit section oxygen concentration detector (7) check point from flue gas heating device (5) is not less than let the combustible material in the flue gas fully burn or basically burn out required time. The continuous on-line monitoring device for the combustion efficiency of the boiler is capable of accurately measuring the quantity of combustible materials in the boiler smoke in real time, is good in measurement stability, small in maintenance quantity and high in precision, and further can control and optimize the combustion state of the boiler and reduce the power generation coal consumption.
Description
Technical Field
The invention relates to a continuous on-line monitoring device for boiler combustion efficiency.
Background
The combustion efficiency of the boiler can be checked by detecting the fly ash combustible matters of the boiler, and the fly ash combustible matters are detected in real time, so that the method is favorable for guiding the operation to correctly adjust the air-coal ratio and improves the combustion control level of the boiler; the index of the fly ash combustible is reasonably controlled, which is beneficial to reducing the power generation cost and improving the economy of the unit operation. With the continuous development of large capacity and high parameters of the electric power generator set in China, the on-line detection of combustibles in the boiler fly ash is realized, so that the on-line detection of combustibles in the boiler fly ash is increasingly important and urgent, the combustion of the boiler is controlled and optimized, the power generation coal consumption is reduced, the competitive price surfing capability and the comprehensive utilization capability of the fly ash are improved.
The traditional measurement method of the fly ash combustible is a chemical burning weightlessness method, and is an off-line laboratory analysis method, and the method has the characteristic of high precision, but is influenced by factors such as ash sample collection, analysis time lag and the like, so that the measurement result cannot timely and accurately reflect the current combustion working condition of the boiler, and the real-time performance is lacking in the control of the boiler combustion and the guidance of the combustion adjustment. The existing online boiler fly ash combustible monitor for power plants basically adopts a microwave measurement technology, but the measurement of fly ash combustibles by the microwave measurement technology is greatly influenced by the change of coal types, the measurement stability and the measurement precision are not ideal, the requirements of users on the measurement precision and the measurement stability are difficult to meet, and most of maintenance amounts are large.
Disclosure of Invention
The invention aims to provide the continuous on-line monitoring device for the combustion efficiency of the boiler, which can accurately measure the quantity of combustible materials in the flue gas of the boiler in real time, has the advantages of good measurement stability, small maintenance quantity and high precision, and can further control and optimize the combustion state of the boiler and reduce the power generation coal consumption.
The invention relates to a continuous online monitoring device for boiler combustion efficiency, which comprises a shell, wherein a flue gas channel is arranged in the shell, an inlet section of the flue gas channel is provided with an inlet section oxygen concentration detector, a flue gas heating device is arranged on the flue gas channel, the flue gas heating device can heat combustible substances in flue gas in the flue gas channel to a temperature above a combustion point, an outlet section oxygen concentration detector is arranged on the flue gas channel and positioned behind the flue gas heating device, and the time for the flue gas to flow from the flue gas heating device to the detection point of the outlet section oxygen concentration detector is not less than the time required for the combustible substances in the flue gas to be fully combusted or basically burned out.
Preferably, a flue gas flow tester is arranged on the flue gas channel.
Preferably, the flue gas heating device is a microwave heating device or an infrared heating device or an electric heating device or a high-temperature plasma heating device or a hot air medium heating device.
Preferably, an electric shutter is connected in series on the flue gas channel.
Preferably, the outlet end or the inlet end of the smoke channel is provided with a speed-adjustable smoke suction fan, and the smoke suction fan is used for sucking smoke into the smoke channel.
Preferably, the outer wall of the shell is coated with a heat-insulating material layer.
The said
When the continuous online monitoring device for the combustion efficiency of the boiler is used, the concentration of oxygen in smoke entering the smoke channel can be measured by the inlet section oxygen concentration detector, the concentration of oxygen in smoke leaving the smoke channel can be measured by the outlet section oxygen concentration detector, the concentration of oxygen measured by the inlet section oxygen concentration detector is subtracted from the concentration of oxygen measured by the outlet section oxygen concentration detector, namely, the concentration of newly reduced oxygen is the concentration of the newly reduced oxygen, and after combustible materials carried by the smoke entering the smoke channel are heated to a temperature above the ignition point by the smoke heating device, oxidation reaction and combustion consumption are carried out with the oxygen are carried out, so that the quantity of combustible materials carried by the smoke entering the smoke channel can be determined through the newly reduced concentration of the oxygen, namely, the combustible materials carried by the smoke entering the smoke channel are in proportion to the newly reduced concentration of the oxygen, and the more combustible materials carried by the smoke entering the smoke channel are explained as the measured value of the reduced concentration of the oxygen is higher; on the contrary, the less the concentration value of the oxygen is measured, namely the less the oxygen is reduced, the less combustible matters carried in the flue gas are indicated, so that the on-line detection of the combustible matters in the boiler fly ash can be realized, the boiler combustion is controlled and optimized, and the power generation coal consumption is reduced. Therefore, the continuous on-line monitoring device for the combustion efficiency of the boiler has the characteristics of capability of accurately measuring the quantity of combustible materials in the flue gas of the boiler in real time, good measurement stability, small maintenance quantity and high precision, and further can control and optimize the combustion state of the boiler and reduce the power generation coal consumption.
Other details and features of the continuous on-line monitoring device for boiler combustion efficiency of the present invention will become apparent upon reading the following detailed description of the embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a continuous on-line monitoring device for boiler combustion efficiency according to the present invention.
Detailed Description
As shown in fig. 1, the continuous online monitoring device for the combustion efficiency of the boiler comprises a shell 1, wherein a flue gas channel 2 is arranged in the shell 1, an inlet section of the flue gas channel 2 is provided with an inlet section oxygen concentration detector 4, a flue gas heating device 5 is arranged on the flue gas channel 2, the flue gas heating device 5 can heat combustible substances in flue gas in the flue gas channel 2 to a temperature above a combustion point, an outlet section oxygen concentration detector 7 is arranged on the flue gas channel 2 and positioned behind the flue gas heating device 5, and the time for the flue gas to flow from the flue gas heating device 5 to a detection point of the outlet section oxygen concentration detector 7 is not less than the time required for fully burning or basically burning the combustible substances in the flue gas.
As a further improvement of the invention, the flue gas channel 2 is provided with a flue gas flow tester 3.
As a further improvement of the present invention, the above-mentioned flue gas heating device 5 is a microwave heating device or an infrared heating device or an electric heating device or a high-temperature plasma heating device or a hot air medium heating device.
As a further improvement of the invention, an electric shutter 8 is connected in series with the flue gas channel 2.
As a further improvement of the invention, the outlet end or the inlet end of the flue gas channel 2 is provided with a speed-adjustable flue gas suction fan 9, and the flue gas suction fan 9 is used for sucking flue gas into the flue gas channel 2.
As a further improvement of the invention, the outer wall of the casing 1 is coated with a heat-insulating material layer.
When the continuous online monitoring device for the combustion efficiency of the boiler is used, the inlet section oxygen concentration detector 4 can measure the concentration of oxygen in the flue gas entering the flue gas channel 2, the outlet section oxygen concentration detector 7 can measure the concentration of oxygen in the flue gas leaving the flue gas channel 2, the concentration of oxygen measured by the outlet section oxygen concentration detector 7 minus the concentration of oxygen measured by the inlet section oxygen concentration detector 4 is the newly reduced concentration of oxygen, and after the combustible materials carried in the flue gas entering the flue gas channel 2 are heated to a temperature above the ignition point by the flue gas heating device 5, the newly reduced oxygen is subjected to oxidation reaction with the oxygen and burnt and consumed, so that the amount of the combustible materials carried in the flue gas entering the flue gas channel 2 can be determined through the newly reduced concentration of the combustible materials carried in the flue gas entering the flue gas channel 2, namely, the combustible materials carried in the flue gas entering the flue gas channel 2 are in direct proportion to the newly reduced concentration of the oxygen, and the more reduced concentration values are measured, and the more reduced oxygen is the more combustible materials carried in the flue gas; on the contrary, the less the concentration value of the oxygen is measured, namely the less the oxygen is reduced, the less combustible matters carried in the flue gas are indicated, so that the on-line detection of the combustible matters in the boiler fly ash can be realized, the boiler combustion is controlled and optimized, and the power generation coal consumption is reduced. Therefore, the continuous on-line monitoring device for the combustion efficiency of the boiler has the characteristics of capability of accurately measuring the quantity of combustible materials in the flue gas of the boiler in real time, good measurement stability, small maintenance quantity and high precision, and further can control and optimize the combustion state of the boiler and reduce the power generation coal consumption.
Claims (6)
1. The utility model provides a continuous on-line monitoring device of boiler combustion efficiency, including casing (1), be equipped with flue gas passageway (2) in casing (1), the entrance of flue gas passageway (2) is equipped with entrance oxygen concentration detector (4), be equipped with flue gas heating device (5) on flue gas passageway (2), combustible material in flue gas heating device (5) can be with the flue gas in flue gas passageway (2) heats to the temperature above the fire point, the rear that is located flue gas heating device (5) on flue gas passageway (2) is equipped with exit section oxygen concentration detector (7), the time that flue gas flows to exit section oxygen concentration detector (7) check point from flue gas heating device (5) is not less than let the combustible material in the flue gas fully burn or basically burn out required time.
2. The continuous on-line monitoring device for the combustion efficiency of the boiler according to claim 1, wherein the flue gas channel (2) is provided with a flue gas flow tester (3).
3. The continuous online monitoring device for the combustion efficiency of the boiler according to claim 2, wherein the flue gas heating device (5) is a microwave heating device, an infrared heating device, an electric heating device, a high-temperature plasma heating device or a hot air medium heating device.
4. A device for continuously monitoring the combustion efficiency of a boiler on line according to claim 3, characterized in that an electric shutter (8) is connected in series to the flue gas channel (2).
5. The continuous online monitoring device for the combustion efficiency of the boiler according to claim 4, wherein the outlet end or the inlet end of the flue gas channel (2) is provided with a speed-adjustable smoke suction fan (9), and the smoke suction fan (9) is used for sucking flue gas into the flue gas channel (2).
6. The continuous on-line monitoring device for the combustion efficiency of the boiler according to claim 5, wherein the outer wall of the shell (1) is coated with a heat-insulating material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448789.7A CN117310072A (en) | 2021-04-25 | 2021-04-25 | Continuous on-line monitoring device for boiler combustion efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448789.7A CN117310072A (en) | 2021-04-25 | 2021-04-25 | Continuous on-line monitoring device for boiler combustion efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117310072A true CN117310072A (en) | 2023-12-29 |
Family
ID=89241227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110448789.7A Pending CN117310072A (en) | 2021-04-25 | 2021-04-25 | Continuous on-line monitoring device for boiler combustion efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117310072A (en) |
-
2021
- 2021-04-25 CN CN202110448789.7A patent/CN117310072A/en active Pending
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