CN103884020B - Method for measuring temperature and component distribution of swirl combustors - Google Patents
Method for measuring temperature and component distribution of swirl combustors Download PDFInfo
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- CN103884020B CN103884020B CN201310450461.4A CN201310450461A CN103884020B CN 103884020 B CN103884020 B CN 103884020B CN 201310450461 A CN201310450461 A CN 201310450461A CN 103884020 B CN103884020 B CN 103884020B
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Abstract
The invention discloses a method for measuring temperature and component distribution of swirl combustors. The method includes forming measuring holes in a swirl combustion boiler; measuring the axial temperature and component distribution of the swirl combustors via the formed measuring holes. The measuring holes correspond to the swirl combustors in the swirl combustion boiler. The method for measuring the temperature and component distribution of the swirl combustors has the advantages that the measuring holes are formed in the swirl combustion boiler and correspond to the swirl combustors in the swirl combustion boiler, so that the axial temperature and component distribution of the swirl combustors can be measured, and pertinent maintenance and high-temperature corrosion prevention can be carried out on the front-back hedging swirl combustion boiler.
Description
Technical field
The present invention relates to swirl flow combustion boiler technology field, particularly relate to temperature and the component distribution of a kind of turbulent burner
Measuring method.
Background technology
According to current energy policy, steam coal uses low-grade colm, therefore coal quantity deviation as far as possible, containing ash
Measure higher.When boiler operatiopn, each heating surface of boiler has mineral deposit phenomenon in various degree, causes each heating surface to produce
The series of problems such as raw abrasion, burn into dust stratification and slagging scorification so that boiler heating surface service life reduction, boiler tubes quick-fried leakage phenomenon frequency
Numerous generation.Under high-temperature flue gas effect, being bonded in the lime-ash on water-cooling wall or high temperature superheater can occur complicated change with tube wall
Learn reaction, form high temperature corrosion.Occur average water cold wall pipe etching extent during high temperature corrosion up to 1.8-2.6mm/a.As used
During sulphur coal, corrosion region directly washing away by flame, its corrosion rate, up to more than 5mm/a, ran the most often generation quick-fried
Pipe blowing out.Therefore, contamination, slagging scorification can regard the omen of high temperature corrosion as.It is thinning that high temperature corrosion easily causes water screen tube, thus causes
Booster phenomenon.Booster revealed by water-cooling wall is the one of the main reasons affecting safe operation of the boiler, and the stable operation on electrical network affects
The biggest.Increasing in particular with large sized unit, the loss that the quick-fried leakage of large-sized station boiler brings is the most increasing.Due to quick-fried
Run affairs thus generation, need during maintenance to retube in a large number, it has a strong impact on the safe and stable operation of boiler controller system, makes equipment examine
Repair work and the cost of overhaul is greatly increased, the most even cause the badly damaged of equipment and casualties.Therefore, eddy flow combustion is measured
Temperature that turbulent burner in burning boiler is axial and component distribution, to Opposed Firing Boiler before and after supercritical or ultra supercritical
High temperature corrosion prevention and control that there is important engineer applied and be worth.
Summary of the invention
Based on this, the invention provides temperature and the component distribution measurement method of a kind of turbulent burner.
The temperature of a kind of turbulent burner and component distribution measurement method, comprise the following steps:
Swirl flow combustion boiler arranges gaging hole；Wherein, in the corresponding described swirl flow combustion boiler in the position of described gaging hole
The position of turbulent burner；
Measured by the described gaging hole arranged, the temperature axial to described turbulent burner and component distribution.
Compared with general technology, the temperature of turbulent burner of the present invention and component distribution measurement method are at swirl flow combustion boiler
On gaging hole is set, the position of the turbulent burner in the corresponding described swirl flow combustion boiler in the position of described gaging hole, can be to described
Temperature and component distribution that turbulent burner is axial measure.It is thus possible to the swirl flow combustion boiler that front and back liquidates is carried out for
Property maintenance and high temperature corrosion prevention.
Accompanying drawing explanation
Fig. 1 is temperature and the schematic flow sheet of component distribution measurement method of turbulent burner of the present invention；
Fig. 2 is the distribution schematic diagram of gaging hole；
Fig. 3 is the Temperature Distribution schematic diagram that the turbulent burner using the present invention to measure is axial；
Fig. 4 is the oxygen concentration distribution schematic diagram that the turbulent burner using the present invention to measure is axial；
Fig. 5 is the carbonomonoxide concentration distribution schematic diagram that the turbulent burner using the present invention to measure is axial；
Fig. 6 is the gas concentration lwevel distribution schematic diagram that the turbulent burner using the present invention to measure is axial；
Fig. 7 is the nitric oxide concentration distribution schematic diagram that the turbulent burner using the present invention to measure is axial.
Detailed description of the invention
By further illustrating the technological means and the effect of acquirement that the present invention taked, below in conjunction with the accompanying drawings and the most real
Execute example, to technical scheme, carry out clear and complete description.
Refer to Fig. 1, for temperature and the schematic flow sheet of component distribution measurement method of turbulent burner of the present invention.
The temperature of a kind of turbulent burner and component distribution measurement method, comprise the following steps:
S101 arranges gaging hole on swirl flow combustion boiler；Wherein, the corresponding described swirl flow combustion boiler in the position of described gaging hole
The position of interior turbulent burner；
S102 is measured by the described gaging hole arranged, the temperature axial to described turbulent burner and component distribution.
For power plant 2 × 600MW unit HG-1900/25.4-YM4 type boiler, it it is resuperheat, a supercritical
The built-in recirculation pump of pressure variable-pressure operation band starts this life (Benson) direct current cooker of system, single burner hearth, balanced draft, consolidates
State deslagging, all steel frame, full overhung construction, π type are arranged.Boiler is outdoor layout.Boiler design coal is that god Fu Dong wins bituminous coal, school
Core coal is Shanxi north bituminous coal.30 low NOX axial rotational flow burner (LNASB) front-back walls layouts of boiler-burner employing,
Opposed firing, is furnished with 6 HP963 medium-speed pulverizer unit pulverized-coal systems, and lower 5 operations of B-MCR operating mode, one standby.
Boiler with maximum continuous load (i.e. BMCR operating mode) as design parameter, the boiler when unit electric load is 661.9MW
Maximum continuous evaporation amount be 1900t/h；When unit electric load is 600MW (TRL operating mode), the rated capacity of boiler is
1808t/h.Table 1 is boiler capacity and major parameter.
Table 1 boiler capacity and major parameter
In LNASB turbulent burner, the air of burning is divided into three strands, First air, secondary wind and tertiary air.First air
Thered is provided by primary air fan, enter and coal pulverizer carries coal dust, form primary wind and powder mixture, send into stove through burner primary air piping
Thorax.At primary air piping by the end of burner hearth side, it is provided with the pulverized coal concentrator of casting, before entering burner hearth at breeze airflow
It is concentrated.The same secondary wind of breeze airflow of concentration, the cooperation of tertiary air, to ensure maintaining at burner throat
One stable flame.
It is positioned at the bellows on water-cooling wall before and after burner hearth, to each burner supplying secondary air and tertiary air.
Secondary wind and tertiary air are entered burner hearth by circular passage concentric in burner, the different phase in burning, are had
Help the reduction of NOX total amount and the after-flame of fuel.The secondary air damper of burner is in order to regulate the secondary air flow of each burner
And the ratio between tertiary air quantity.The adjusting lever of baffle plate can be in the position of combustor external regulating fender through combustor panel.
Secondary wind and tertiary air are produced necessary rotation by respective cyclone, and the cyclone of usual tertiary air is during burner assembles
Just it is fixed on burner outlet position foremost, in order to produce the strongest rotation.In the occasion that some are special, by combustion
It is also possible that stick on burner panel adjusts the position of tertiary air cyclone.The swirl strength of secondary wind can pass through
The axial location of regulation cyclone is adjusted.The adjusting lever of cyclone can adjust rotation through combustion panel outside burner
The position of stream device.In addition to these three wind, every burner also has one centre wind.In burner centre supply is appropriate
Heart-wind syndrome, with stable oil flame, prevents oil flame impingement central air hose and oil burner cyclone.Meanwhile, one continuous print air-flow leads to
Cross central air hose and flow through oil gun, oil burner nozzle and cyclone to prevent oil droplet and flyash to be deposited on central air hose.
Oil gun and igniter, the also cable line of an oily flame detector it is disposed with in central air hose.Special at some
Under stable condition, in central air hose, only arrange oil gun and igniter, the cable line of oil flame detector not from there through.
As one of them embodiment, the described step arranging gaging hole on swirl flow combustion boiler, comprise the following steps:
The flame-observing hole of turbulent burner is set to described gaging hole.
Gaging hole position elects the flame-observing hole of burner as, and the result therefore measured is not strict axial distribution, but deviation
Certain position of burner axle.Flame-observing hole is set to gaging hole, completing of measuring task can be ensured well, and make use of pot
Stove itself constructs, it is easy to accomplish.
Measure as one of them embodiment, the described temperature axial to described turbulent burner and component distribution
Step, comprises the following steps:
Survey rifle by water-cooled the axial temperature of described turbulent burner and component distribution are measured.
Described water-cooled is surveyed rifle and is entered the burner hearth of described turbulent burner through outer second air pipeline, and described water-cooled surveys the length of rifle
Degree is more than or equal to 5 meters.
Water-cooled is surveyed rifle and is goed deep into burner hearth from flame-observing hole, through outer second air pipeline.Referring to Fig. 2, the distribution for gaging hole is illustrated
Figure.
In order to grasp the smoke distribution characteristic in burner hearth, the combustion characteristics of single burner need to be understood.Use 5 meters of long water
Cold survey rifle measures the axial temperature of turbulent burner and component distribution, has grasped coal dust pyrolysis and combustion characteristic axially.
Owing to HG-1900/25.4-YM4 type boiler front-back wall respectively arranges three grate firing burners, 5 every layer.The burner of close side wall
Combustion characteristics is different from away from side wall burner, and test measures the axial of B1, B2 and B3 totally 3 burners of the rear wall second layer
Temperature and component distribution, to study the side wall impact on burning.B1 burner near side wall, B3 burner in the centre of rear wall,
B2 burner is between B1 and B3 burner.The absolute altitude of this grate firing burner is 26.192 meters.The B1 distance away from side wall is 3158.65
Millimeter, the spacing of burner is 3967.5 millimeters.Additionally, B1 and B3 burner is that First air is left-handed, B2 burner is First air
Dextrorotation, does not therefore have comparability between B1 and B3 burner and B2 burner.
Refer to Fig. 3, for using the axial Temperature Distribution schematic diagram of the turbulent burner measured of the present invention.At burner
Outlet, i.e. the position of x=0m, measure is the temperature of secondary wind, is about 400 DEG C.Then temperature gradually rises, the highest temperature
Degree reaches 1382 DEG C.Bent significantly lower than the axial temperature of B2 and B3 burner near the axial temperature curve of the B1 burner of side wall
Line.Due to the cooling effect of water-cooling wall, the axial temperature of B1 burner is less than B2 and B3 burner about 200 DEG C.B3 burner
Axial temperature is slightly above the axial temperature of B2 burner, but both are more or less the same.Temperature profile shows that water-cooling wall is near side
The Temperature Distribution of the burner of wall has cooling effect, and the impact on other burners is little.
Measure as one of them embodiment, the described temperature axial to described turbulent burner and component distribution
In step, the component of measurement includes oxygen, carbon monoxide, carbon dioxide and/nitric oxide.
Refer to Fig. 4, for using the axial oxygen concentration distribution schematic diagram of the turbulent burner measured of the present invention.B2 fires
The oxygen concentration of burner starts drastically to decline at x=0.5m, shows to have occurred and that combustion reaction herein.B1 and B3 burner
Oxygen consume position than B2 burner rearward and gentler.Owing to B2 burner is First air dextrorotation, B1 and B3 burner
Left-handed for First air, the coal dust skewness being likely to be due to First air outlet result in left-handed and dextrorotation burner outlet component
The difference of distribution.
Refer to Fig. 5, for using the axial carbonomonoxide concentration distribution schematic diagram of the turbulent burner measured of the present invention.
The temperature of B2 burner outlet and the distribution of B1 very close to, but the CO of B2 burner rises relatively early, illustrate that B2 herein burns
The coal powder density of device is higher.The gaging hole orientation coal powder density of left-handed burner is relatively low.
Refer to Fig. 6, for using the axial gas concentration lwevel distribution schematic diagram of the turbulent burner measured of the present invention.
The phenomenon of this coal dust skewness can also be described, the CO2 concentration of B2 burner is also to start drastically in the position of x=0.5m
Rise.B3 burner outlet is because temperature is higher, so more than B1 burner of CO2 concentration.
Refer to Fig. 7, for using the axial nitric oxide concentration distribution schematic diagram of the turbulent burner measured of the present invention.
Between x=0.5～1.5 meters, the NO concentration of B2 burner is the highest, and B3 burner takes second place, minimum near the B1 burner of side wall.
The coal powder density that B2 burner is higher in the reason that beginning NO concentration is high has discharged more nitrogen oxides.Meanwhile also
Discharge more CO, create the atmosphere of reproducibility, the NO generated is had reproducibility effect, the therefore NO of B2 burner
Rise shallower.B1 and B3 burner does not forms reducing atmosphere owing to CO concentration is relatively low, and coal dust herein is formed and burns completely
NO discharge is made drastically to raise.Owing to B1 burner is near side wall, temperature is relatively low, and therefore NO discharge can be less than B3 burner.
Compared with general technology, the temperature of turbulent burner of the present invention and component distribution measurement method are at swirl flow combustion boiler
On gaging hole is set, the position of the turbulent burner in the corresponding described swirl flow combustion boiler in the position of described gaging hole, can be to described
Temperature and component distribution that turbulent burner is axial measure.It is thus possible to the swirl flow combustion boiler that front and back liquidates is carried out for
Property maintenance and high temperature corrosion prevention.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. the temperature of a turbulent burner and component distribution measurement method, it is characterised in that comprise the following steps:
Swirl flow combustion boiler arranges gaging hole；Wherein, the eddy flow in the corresponding described swirl flow combustion boiler in the position of described gaging hole
The position of burner；Wherein, described swirl flow combustion boiler is the swirl flow combustion boiler that front and back liquidates, and burns in described turbulent burner
Air be divided into three strands, First air, secondary wind and tertiary air, wherein, First air is provided by blower fan, enters in coal pulverizer and carries
Coal dust, forms primary wind and powder mixture, through the primary air piping feeding burner hearth of described turbulent burner；At primary air piping by burner hearth one
The end of side, is provided with the pulverized coal concentrator of casting, concentrates it before described primary wind and powder mixture enters burner hearth；Two
Secondary wind and tertiary air are by the bellows supply being positioned at before and after burner hearth on water-cooling wall, and secondary wind and tertiary air are by described turbulent burner
Interior concentric circular passage enters burner hearth in the different phase of burning；Described turbulent burner is also supplied to one appropriate in
Heart-wind syndrome；
Measured by the described gaging hole arranged, the temperature axial to described turbulent burner and component distribution.
The temperature of turbulent burner the most according to claim 1 and component distribution measurement method, it is characterised in that described
The step of gaging hole is set on swirl flow combustion boiler, comprises the following steps:
The flame-observing hole of turbulent burner is set to described gaging hole.
The temperature of turbulent burner the most according to claim 1 and component distribution measurement method, it is characterised in that described right
Temperature and component that described turbulent burner is axial are distributed the step measured, and comprise the following steps:
Survey rifle by water-cooled the axial temperature of described turbulent burner and component distribution are measured.
The temperature of turbulent burner the most according to claim 3 and component distribution measurement method, it is characterised in that described water
Cold survey rifle enters the burner hearth of described turbulent burner through outer second air pipeline.
The temperature of turbulent burner the most according to claim 3 and component distribution measurement method, it is characterised in that described water
The length of cold survey rifle is more than or equal to 5 meters.
The temperature of turbulent burner the most according to claim 1 and component distribution measurement method, it is characterised in that described right
Temperature and component that described turbulent burner is axial are distributed in the step measured, and the component of measurement includes oxygen, an oxidation
Carbon, carbon dioxide and/nitric oxide.
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| CN201310450461.4A CN103884020B (en) | 2013-09-27 | 2013-09-27 | Method for measuring temperature and component distribution of swirl combustors |
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| CN201310450461.4A CN103884020B (en) | 2013-09-27 | 2013-09-27 | Method for measuring temperature and component distribution of swirl combustors |
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| CN103884020B true CN103884020B (en) | 2017-01-11 |
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| DE4305645C2 (en) * | 1993-02-24 | 1996-10-02 | Rwe Entsorgung Ag | Method for determining characteristic properties of processes forming free radicals, use of the method and device for carrying out the method |
| JP2004077009A (en) * | 2002-08-15 | 2004-03-11 | Jfe Steel Kk | Heating furnace with tubular flame burner and combustion control method |
| CN100387903C (en) * | 2006-02-21 | 2008-05-14 | 西安热工研究院有限公司 | Detection distance determining method for flame detector of coal powder fired boiler burner |
| EP1892556B1 (en) * | 2006-08-24 | 2009-03-11 | Siemens Aktiengesellschaft | Light guide |
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Address after: 510080 water Donggang 8, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 water Donggang 8, Dongfeng East Road, Yuexiu District, Guangzhou, Guangdong. Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |
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