CN105675810B - A kind of monitoring method of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and high-temperature corrosion atmosphere - Google Patents
A kind of monitoring method of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and high-temperature corrosion atmosphere Download PDFInfo
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Abstract
The invention discloses a kind of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and the monitoring method of high-temperature corrosion atmosphere.Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system, including one-level flue gas dilution sampling unit, secondary smoke dilution sampling unit, dilution flue gas analysis unit, system backflush unit and compressed air unit；Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention, realize the monitoring of exhaust gas components under normal temperature, all valves are further made to be each provided on compressed air line, the ingenious influence for avoiding high temperature, dust, it ensure that the long-term continuous reliability service of system, and have cost advantage concurrently, it is remarkably improved the security and economy of station boiler operation.
Description
Technical field
The present invention relates to a kind of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and the monitoring method of high-temperature corrosion atmosphere,
Belong to Utility Boiler Technology field.
Background technology
In recent years, as boiler develops to Large Copacity, high parameter, boiler water wall temperature is accordingly improved, and causes water-cooling wall
High Temperature Corrosion more becomes serious；In order to reduce NOx growing amount, power plant uses air stage feeding or low oxygen combustion mostly at present,
Cause water-cooling wall near zone easily to form reducing atmosphere, and then cause the high temperature corrosion of water-cooling wall, water-cooling wall is thinned to necessarily
Degree will cause boiler tubes cracking accident, and the safety and economic operation of boiler controller system is constituted a serious threat.
High-temperature corrosion in boiler is broadly divided into two kinds of sulfate type and sulfide type, and the former is multiple to be born in superheater and reheating
Device, the latter is multiple to be born in furnace wall cooling.The main cause of sulfide type high temperature corrosion is that coal dust burns production under anoxic conditions
Raw H2S and free state sulphur [S], it reacts to form the sulfide of iron with tube wall ferrous metal and ferriferous oxide, further
Corrosion boiler water wall simultaneously makes loose oxide-film, breakaway or even come off simultaneously.
Certain research shows, when there is reducing atmosphere near furnace wall cooling, and the sulphur in fire coal is with H2The form of S gases
The ratio discharged is more than 75%；As CO/ (CO+CO2) when rising to 24% by 8%, H2S gas concentrations are then by 0.02%
0.07% is risen to, so as to cause the strong corrosion of water-cooling wall.
Substantial amounts of operating analysis discovery, all furnace wall cooling of all seriously corrodeds, the smoke components in corresponding corrosion area
Middle discovery reducing atmosphere and dense H2S gases.H2S gases have osmosis, and it can pass through loose Fe2O3,
With finer and close magnetic iron oxide Fe3O4In FeO reaction generation FeS.After the destruction of FeO diaphragms, H2S gases can also be with pipe
Wall Fe, which reacts, generates FeS and H2.Because corrosion product FeS and FeO short textures are porous, it is impossible to prevent invading for corrosive medium
Enter, while washing away with burner hearth flue dust so that corrosion constantly develops to parent metal, corrosion ecto-entad gradually develops.Pipe
Nearby oxidizing atmosphere is alternately present wall with reducing atmosphere, the reoxidized oxide for iron of corrosion product of generation, and it is again
It can continue to react with corrosive medium, corrosion constantly aggravation.
It was found from the mechanism of water wall high temperature corrosion, reducing atmosphere is the necessary condition for occurring high temperature corrosion.Therefore, it is right
The region that high temperature corrosion easily occurs for water-cooling wall carries out reducing atmosphere monitoring, contributes to operations staff to pinpoint the problems and pass through in time
Firing optimization is solved.But nearby flue-gas temperature is very high for boiler water wall, containing a large amount of dust, and needs to measure multiple spot, adopts
Continuous reliable monitoring is difficult to ensure that with conventional smoke sampling analysis system.Conventional smoke sampling analysis system such as Chinese patent
CN200810195414.9 disclosures, which disclose a kind of high temperature corrosion on-line monitoring system for boiler water-cooled wall, bag
Include sampling system and controlling of sampling and processing system, the sampling system includes flue gas sampling inserting tube, flue gas sampling inserting tube it
It is followed by being provided with the flue gas sampling probe incubation chamber of temperature control device, electric tracing tube, fast quickly cooling is connected with after probe incubation chamber
But device, is divided into two branch roads afterwards, wherein being all the way gas bypass, another road is sequentially connected sample gas barrier magnetic valve, sample gas and adopted
Sample pump, demarcation/sampling three-way magnetic valve, 0.1 μm of ceramic filter, sample gas metering pin valve and flowmeter and flue gas analysis instrument；
The controlling of sampling includes with processing system：The PLC of controllable sampling system operation；Pass through data wire phase with flue gas analysis instrument
The data acquisition unit connect；The industrial computer being connected with data acquisition unit by data wire.Said system is excessively complicated, not only cost
Very high, and whole system operational reliability is not high, especially valve, sampling pump etc. have movable part to be highly prone to due to inside
The influence of dust.
The content of the invention
In order to solve the excessively complexity that smoke sampling analysis system in the prior art is present, not only cost is very high, and
Whole system operational reliability is not high, and especially valve, sampling pump etc. are due to the internal influence for having movable part to be highly prone to dust
Etc. defect, the present invention provides the monitoring method of a kind of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and high-temperature corrosion atmosphere.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows：
A kind of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system, including one-level flue gas dilution sampling unit, secondary smoke
Dilution sampling unit, dilution flue gas analysis unit, system backflush unit and compressed air unit；
One-level flue gas dilution sampling unit includes two or more one-level flue gas dilution sample lines in parallel and one mixed
Current divider is closed, all one-level flue gas dilution sample lines converge to mixing current divider；
Secondary smoke dilution sampling unit includes interconnected secondary smoke dilution sampling pipeline and gas skirt, two grades of cigarettes
Gas dilution sampling pipeline is connected with mixing current divider；
System backflush unit one end connects with compressed air unit, the other end connects with mixing current divider；
One-level flue gas dilution sample lines and secondary smoke dilution sampling pipeline connect with compressed air unit；
Dilution flue gas analysis unit connects with gas skirt.
Said system is suitable to the monitoring of high-temperature corrosion atmosphere, and simple in construction, and with low cost, whole system is reliable
Property, it is not easily susceptible to the influence of dust.
For the ease of control, compressed air unit at least includes a compressed air reservoir and and compressed air reservoir
One compressed air inlet valve of outlet, compressed air inlet valve and system backflush unit, one-level flue gas dilution sampling pipe
Road is connected with secondary smoke dilution sampling pipeline.Above-mentioned compressed air inlet valve intake valve can be manual or electricity
Dynamic or Electromagnetic Control.
The upstream of all magnetic valves is connected with compressed air inlet valve in system.
In order to improve the accuracy and reliability of monitoring, each one-level flue gas dilution sample lines includes connected in order
Flue gas sampling point, dust setting chamber, one-level ejector and control one-level ejector working condition compressed air one-level work
Control magnetic valve；
One-level ejector includes the first ejection gas entrance, the first working gas entrance and the first mixed gas outlet, the
One ejection gas entrance, the first working gas entrance and the first mixed gas outlet are mutually communicated by pipeline, the first injection gas
Body entrance meets dust setting chamber, and the first working gas entrance connects compressed air one-level industry control magnetic valve, the first mixed gas outlet
Converge to mixing current divider；
The upstream of all compressed air one-level industry control magnetic valves is connected with compressed air inlet valve.
Flue gas sampling point is in matrix arrangements, adjacent two flue gas samplings point in the region that high temperature corrosion easily occurs for boiler water wall
Spacing be 1~3m.
The application perforate on water-cooling wall fin, picks out flue gas sampling point.
Secondary smoke dilution sampling pipeline includes two grades of industry control magnetic valves of secondary jets device and compressed air；
Secondary jets device includes the second ejection gas entrance, the second working gas entrance and the second mixed gas outlet, the
Two ejection gas entrances, the second working gas entrance and the second mixed gas outlet are mutually communicated by pipeline, the second injection gas
Body entrance connects mixing current divider, and the second working gas entrance connects two grades of industry control magnetic valves of compressed air, the second mixed gas outlet
Connect gas skirt；
The upstream of two grades of industry control magnetic valves of compressed air is connected with compressed air inlet valve.
In order to avoid the influence of dust, one-level ejector and secondary jets device are annular jet device；
For the ease of designing and manufacturing, one-level ejector and secondary jets device are same size.
Above-mentioned one-level ejector rate of discharge is more than secondary jets device inlet flow rate, the mixed gas of one-level ejector outlet
Mixing current divider is flow to, under combustion chamber draft effect, largely all through other one-level flue gas dilution sample lines adverse current to burner hearth,
Play a part of certain blowback and cool down high temperature samples tube head at other smoke sampling points, it is to avoid block or burn.
In order to be further ensured that the accuracy and service life of system monitoring, system backflush unit at least includes a compression
Air blowback magnetic valve, compressed air blowback magnetic valve one end connection compressed air unit, other end connection mixing current divider.
In order to ensure the accuracy of monitoring, dilution flue gas analysis unit includes flue gas analysis instrument connected in order, data
Acquisition module and data analysis and processing module, wherein flue gas analysis instrument are connected on gas skirt.Data acquisition module and data point
Analyse processing module and use correlation module commonly used in the art, the application has no improvement in module, and improvement is whole system
Part composition, it is ensured that flue gas analysis instrument obtains Monitoring Data steadily in the long term.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention, can be to easily occurring multiple flue gases in high temperature corrosion region
Sampled point carries out patrolling survey.
It is preferred that, flue gas analysis instrument is stationary gas detector, is fixed on gas skirt, measuring probe extends isolating cylinder
Annular self raising flour dust concentration region between central tube, is detected using diffusion way.
Above-mentioned stationary gas detector can show measured value on the spot and with warning function, and measured value is converted to 4
~20mA electric signals, are transmitted to data acquisition module and data analysis and processing module.
In order to reduce cost, while ensureing the accuracy of Monitoring Data, gas skirt includes conical shell, isolating cylinder, center
Cylinder and gauge mount flange, conical shell, isolating cylinder and central tube are set gradually from outside to inside, shape between isolating cylinder and central tube
Low soot region is circularized, gauge mount flange is arranged on conical shell, and the measuring probe of flue gas analysis instrument extends isolation
Annular low soot region between cylinder and central tube；Conical shell is provided with the inlet duct tangentially accessed.
The method that above-mentioned boiler water-cooling wall high-temperature corrosion atmosphere monitoring system monitors high-temperature corrosion atmosphere, flue gas is sequentially passed through
After one-level flue gas dilution sample lines, mixing current divider, secondary smoke dilution sampling pipeline and gas skirt, dilution flue gas point is flowed into
Analyse unit and implement measurement；Compressed air unit connects and one-level flue gas dilution sample lines and secondary smoke dilution sampling pipeline phase
It is common to the dilution of flue gas；System backflush unit is used for the cleaning of system.
Said system carries out patrolling survey to some flue gas sampling points in high temperature corrosion region easily occur on water-cooling wall, when in patrolling
Survey state, compressed air one-level industry control magnetic valve is opened successively respectively, and any time ensures only one compressed air one-level work
Control magnetic valve is to open, and the sample gas gathered comes from corresponding flue gas sampling point, and patrols under survey state, compressed air two
Level industry control magnetic valve is opened, and compressed air inlet valve is opened, compressed air blowback closed electromagnetic valve；When in blowback state,
All compressed air one-level industry control magnetic valves are turned off, and two grades of industry control magnetic valves of compressed air are also switched off, and compressed air air inlet
Valve and compressed air blowback magnetic valve are all opened.
In order to extend the service life of system, while ensureing the accuracy of monitoring, it is preferable that often patrol time all flue gases of survey and adopt
Sampling point, whole system pipeline of blowback and equipment.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention, employs compressed air to dilute high-temperature flue gas, warp
Dilution ratio is up to 5 after one-level ejector and secondary jets device:1~20:1, should during again successively through above-mentioned dust setting chamber, mixed
Current divider and gas skirt dedusting are closed, therefore above-mentioned flue gas analysis instrument is hardly influenceed by dust in flue gas, without setting filter
The secondary filter equipment such as cylinder, it is non-maintaining；Further, since dilution ratio is higher, longer pipeline have passed through again, therefore without setting
Put special cooling device, you can ensure that gas temperature is close to environment temperature in gas skirt, so as to reduce to flue gas analysis instrument
Heatproof requirement.The system is required also significantly due to being diluted using compressed air to high-temperature gas, therefore to the air-tightness of pipeline
Decline, and then ensure that system operation reliability.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention, at least needing the atmosphere of monitoring includes O2With CO concentration；
In order to improve the degree of accuracy of corrosivity judge, H should be also monitored2S and SO2Concentration.CO, H of the system actual measurement2S and SO2Concentration is needed
The concentration of each composition in former flue gas is scaled to according to dilution ratio, and the basic foundation that dilution ratio is determined is：If monitor compared with
The CO of high concentration, then illustrate the smoke sampling point be in reducing atmosphere in, and it is substantial amounts of practice have shown that, in reducing atmosphere
O2Concentration is extremely low, and generally less than 0.5%, it is believed that O is not present in former flue gas2, while according to O in air2Accounting be
20.9%, can be by (the 20.9- actual measurements O of calculating formula 20.9/2Concentration) extrapolate approximate dilution ratio.When monitor CO concentration compared with
When low, illustrate that the smoke sampling point is in oxidizing atmosphere, using the average value of design dilution ratio or dilution ratio, because
Now judgement of the measurement error on high temperature corrosion situation does not influence, if namely the system to measure CO concentration relatively low, illustrate height
Warm corrosion risk is very low, now the degree of accuracy of actual numerical value is inessential, it is not necessary to which exact value calculates corrosion rate.
The reasonability for diluting the monitoring that flue gas carries out reducing atmosphere again above by compressed air is also embodied in：It is theoretical and
Practical studies show, when CO concentration in flue gas is less than 104During ppm, water-cooling wall will not typically produce high temperature corrosion；As CO in flue gas
Concentration is more than 104Ppm and less than 5 × 104During ppm, slighter high temperature corrosion phenomenon occurs for water-cooling wall；Work as CO concentration in flue gas
More than 5 × 104During ppm, water wall high temperature corrosion speed increases in geometry level.A large amount of practices are it is also shown that water-cooling wall wall flue gas
In CO concentration be often mutation, 10 are much smaller than when oxygen is sufficient4Ppm, and during oxygen deficiency, CO very high concentrations often exceed
105ppm.Therefore, because CO concentration has the difference on the order of magnitude under the conditions of two kinds, water-cooling wall whether there is High Temperature Corrosion
Judgement it is more clear, it is not required that flue gas analyzer has very high precision, so that the determination to dilution ratio
Just required without high-precision.In fact, more than 104The range of ppm CO measurement of concetrations beyond conventional instrument, to flue gas
It is that caving-in bash is also preferred act to carry out high magnification dilution.
It should be added that, water wall high temperature corrosion speed is accelerated to be also equipped with two notable features：One is former flue gas
Middle H2S concentration is more than 300ppm, and two be H2S and SO2The ratio of concentration is more than 1.Therefore, while monitoring H2S and SO2Concentration will be favourable
In accurately judging high temperature corrosion speed.H in flue gas after compressed Dilution air2S and SO2Concentration declines to a great extent, but conventional instrument
Remain to more accurately measure.In addition, H2S and SO2The ratio of concentration is not influenceed by dilution ratio, is conducive to more precisely sentencing
Broken height temperature corrosion condition.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention also has instrument check prompt facility.When in blowback
It is air into the gas in above-mentioned gas skirt during state, now O2Concentration should be 20.9%, and CO, H2S and SO2Concentration
It all should be zeroed.If it is more to deviate above-mentioned value, timely check meter is pointed out.This facilitate deciding on measurement data accuracy and effectively
Property, so as to avoid erroneous judgement.
Above-mentioned dust setting chamber, mixing current divider and gas skirt all make dust precipitate by dilatation reduction of speed, wherein collecting
Gas hood inlet duct is tangentially accessed, and is also carried out dedusting by the principle of cyclonic separation, is made most of dust adherent with gas
Discharge is exported from the gas skirt of bottom, so as to ensure that above-mentioned flue gas analysis instrument is operated in self raising flour dust concentration region.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention has automatically and manually two kinds of working conditions, automatic shape
The system is automatically performed to patrol and surveyed and blowback under state, and user of service can choose the progress of some of which flue gas sampling point under manual mode
Singly survey or patrol survey.When burning optimization is adjusted, choose the flue gas corresponding to the high temperature corrosion region found under automatic surveying state and adopt
Sampling point, carries out targetedly Adjustment Tests, so that operating efficiency is improved, for not monitoring that the flue gas of reducing atmosphere is adopted always
Sampling point, can no longer be sampled, to shorten the time for patrolling survey every time.
The NM technology of the present invention is with reference to prior art.
Boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the present invention, realizes the monitoring of exhaust gas components under normal temperature, enters one
Step makes all valves be each provided on compressed air line, the ingenious influence for avoiding high temperature, dust, it is ensured that system is continuous for a long time
Reliability service, and have cost advantage concurrently, it is remarkably improved the security and economy of station boiler operation.
Brief description of the drawings
Fig. 1 is the schematic diagram of the boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the embodiment of the present invention 1.
Fig. 2 is the schematic diagram of boiler water-cooling wall high-temperature corrosion atmosphere monitored area in the embodiment of the present invention 1.
Fig. 3 is the structural representation of one-level ejector in the embodiment of the present invention 1.
Fig. 4 is the structural representation of gas skirt in the embodiment of the present invention 1.
In above-mentioned each figure, 1 is one-level ejector, and 2 be secondary jets device for mixing current divider, 3, and 4 be gas skirt, and 5 be oxygen
Analyzer is measured, 6 be hydrogen sulfide analyzer, and 7 be flue gas analyser, and 8 be carbonyl analyzer, and 9 be dust setting chamber, 10
It is the manual intake valve of compressed air for compressed air reservoir, 11,12 be compressed air one-level industry control magnetic valve, and 13 is empty for compression
Gas blowback magnetic valve, 14 be two grades of industry control magnetic valves of compressed air, and 20 be burnout degree center line absolute altitude, and 21 be boiler water wall,
22 is easily occur the region of high temperature corrosion, and 23 be flue gas sampling point, and 31 be flue gas (ejection gas) entrance, and 32 be compressed air
(working gas) entrance, 33 be gas skirt entrance for dilution flue gas (mixed gas) outlet, 40, and 41 be conical shell, 42 be every
From cylinder, cylinder centered on 43,44 be gauge mount flange, and 45 be that gas skirt is exported.
Embodiment
For a better understanding of the present invention, with reference to the embodiment content that the present invention is furture elucidated, but the present invention
Content is not limited solely to the following examples.
Embodiment 1
660MW ultra-supercritical coal-fired units boiler uses the combustion system of opposed firing, in both walls middle part, combustion
Wind center line elevation location is also easy to produce high temperature corrosion in the range of 6 meters adjacent and above to the greatest extent, and water screen tube is thinned speed and reaches 2mm/,
The safe operation of serious threat unit.According to situation is checked during maintenance, delimit both walls and easily occur the region of high temperature corrosion, always
Width is 10 meters, and total height is 12.5 meters, and both walls are symmetrical.In order to shorten connecting line, the survey cycle is patrolled while shortening, per surface side
Wall installs a set of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system of the invention；25 flue gas sampling points are put per surface side wall paper,
2 meters of horizontal direction spacing, 2.5 meters of vertical direction spacing.The schematic diagram of the system is shown in Fig. 1, and the schematic diagram of institute monitored area is shown in figure
2, the structure of core component one-level ejector and gas skirt is shown in Fig. 3 and Fig. 4.
The system include one-level flue gas dilution sampling unit, secondary smoke dilution sampling unit, dilution flue gas analysis unit,
System backflush unit and compressed air unit；One-level flue gas dilution sampling unit is by 25 one-level flue gas dilution sampling pipes in parallel
Road and a mixing current divider composition；Each flue gas sampling point connected in order, dust in one-level flue gas dilution sample lines
Expansion chamber, one-level ejector and the compressed air one-level industry control magnetic valve for controlling its working condition；One-level ejector first draws
Gas access Jun Jie dust setting chambers are penetrated, the first working gas entrance connects compressed air one-level industry control magnetic valve, the first mixing
Gas vent converges to same mixing current divider；Secondary smoke dilution sampling unit is by a secondary smoke dilution sampling pipeline
With a gas skirt composition；Secondary smoke dilution sampling pipeline is by two grades of industry control electricity of a secondary jets device and a compressed air
Magnet valve is constituted；Secondary jets device the second ejection gas entrance connects mixing current divider, and the second working gas entrance connects compressed air two
Level industry control magnetic valve, the second mixed gas outlet connects gas skirt；Dilution flue gas analysis unit includes flue gas analysis instrument, data and adopted
Collect module and data analysis and processing module；System backflush unit at least includes a compressed air blowback magnetic valve, one end connection
Compressed air unit, other end connection mixing current divider；Compressed air unit at least includes a compressed air reservoir and its
One manual intake valve of compressed air of outlet, in system the upstream of all magnetic valves with the manual intake valve phase of compressed air
Even.
The system carries out patrolling survey to easily occurring multiple flue gas sampling points in the region of high temperature corrosion.When in patrolling survey state,
Above-mentioned 25 compressed airs one-level industry control magnetic valve is opened successively respectively, and any time ensures that only one is opening, is adopted
The sample gas of collection comes from corresponding flue gas sampling point；Patrol under survey state, above-mentioned two grades of industry control magnetic valves of compressed air are opened, pressure
The manual intake valve of contracting air is opened, compressed air blowback closed electromagnetic valve.When in blowback state, above-mentioned multiple compressed airs
One-level industry control magnetic valve is turned off, and two grades of industry control magnetic valves of compressed air are also switched off, and the manual intake valve of compressed air and compression
Air blowback magnetic valve is all opened.
The atmosphere of the system monitoring includes O2、H2S、SO2With CO concentration, according to actual measurement O2Concentration correction designs dilution ratio
(design dilution ratio is 9:1, correspondence actual measurement O2Concentration should be 19% or so), and then learn the concentration of each composition in former flue gas.
The system flue gas analyzer uses stationary gas detector, when monitoring former CO concentration in flue gas more than 5 × 104During ppm, Gu
Fixed pattern carbon monoxide detector can send sound and light alarm.
The system often patrols time 25 flue gas sampling points of survey, whole system pipeline of blowback and equipment, and examines automatically
Fixed O2Whether detector is shown as (20.9 ± 0.2) %, when beyond this scope, indicating instrument needs verification；It is simultaneously automatic
Examine whether other stationary gas detectors are all zeroed, can also point out corresponding instrument to need verification when deviation is big.
Embodiment 2
The present embodiment is similar to Example 1, except that being installed on the subcritical coal units of 300MW, boiler uses four
Angle tangential firing mode, water-cooling wall four sides wall arranges flue gas sampling point, and the diagonal boiler water wall for installing two sets of present invention is high
Warm corrosive environment monitoring system.
Claims (10)
1. a kind of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system, it is characterised in that：Including one-level flue gas dilution sampling unit,
Secondary smoke dilution sampling unit, dilution flue gas analysis unit, system backflush unit and compressed air unit；
One-level flue gas dilution sampling unit includes two or more one-level flue gas dilution sample lines in parallel and a mixing point
Device is flowed, all one-level flue gas dilution sample lines converge to mixing current divider；
Secondary smoke dilution sampling unit includes interconnected secondary smoke dilution sampling pipeline and gas skirt, and secondary smoke is dilute
Sample lines are released with mixing current divider to be connected；
System backflush unit one end connects with compressed air unit, the other end connects with mixing current divider；
One-level flue gas dilution sample lines and secondary smoke dilution sampling pipeline connect with compressed air unit；
Dilution flue gas analysis unit connects with gas skirt.
2. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 1, it is characterised in that：Compressed air unit
At least include a compressed air reservoir and a compressed air inlet valve with compressed air reservoir outlet, compression
Air inlet valve is connected with system backflush unit, one-level flue gas dilution sample lines and secondary smoke dilution sampling pipeline.
3. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 2, it is characterised in that：Each one-level cigarette
Gas dilution sampling pipeline includes flue gas sampling point connected in order, dust setting chamber, one-level ejector and control one-level and penetrated
Flow the compressed air one-level industry control magnetic valve of device working condition；
One-level ejector includes the first ejection gas entrance, the first working gas entrance and the first mixed gas outlet, and first draws
Penetrate gas access, the first working gas entrance and the first mixed gas outlet to be mutually communicated by pipeline, the first ejection gas enters
Kou Jie dust setting chambers, the first working gas entrance connects compressed air one-level industry control magnetic valve, the first mixed gas outlet converge to
Mix current divider；
The upstream of all compressed air one-level industry control magnetic valves is connected with compressed air inlet valve.
4. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 3, it is characterised in that：Flue gas sampling point exists
The region that high temperature corrosion easily occurs for boiler water wall is in matrix arrangements, and the spacing for the 2 flue gas sampling points that are connected is 1~3m.
5. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 3, it is characterised in that：Secondary smoke dilutes
Sample lines include two grades of industry control magnetic valves of secondary jets device and compressed air；
Secondary jets device includes the second ejection gas entrance, the second working gas entrance and the second mixed gas outlet, and second draws
Penetrate gas access, the second working gas entrance and the second mixed gas outlet to be mutually communicated by pipeline, the second ejection gas enters
Mouth connects mixing current divider, and the second working gas entrance connects two grades of industry control magnetic valves of compressed air, and the second mixed gas outlet connects collection
Gas hood；
The upstream of two grades of industry control magnetic valves of compressed air is connected with compressed air inlet valve.
6. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 2, it is characterised in that：System backflush unit
At least include a compressed air blowback magnetic valve, compressed air blowback magnetic valve one end connection compressed air unit, the other end
Connection mixing current divider.
7. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 2, it is characterised in that：Dilute flue gas analysis
Unit includes flue gas analysis instrument connected in order, data acquisition module and data analysis and processing module, wherein flue gas analyzer
Table is connected on gas skirt.
8. boiler water-cooling wall high-temperature corrosion atmosphere monitoring system as claimed in claim 7, it is characterised in that：Gas skirt includes cone
Shape shell, isolating cylinder, central tube and gauge mount flange, conical shell, isolating cylinder and central tube are set gradually from outside to inside, every
From annular low soot region is formed between cylinder and central tube, gauge mount flange is arranged on conical shell, flue gas analysis instrument
Measuring probe extend annular low soot region between isolating cylinder and central tube；Conical shell is provided with the entrance tangentially accessed
Pipeline.
9. utilize the boiler water-cooling wall high-temperature corrosion atmosphere monitoring system monitoring high temperature corrosion described in claim 1-8 any one
The method of atmosphere, it is characterised in that：It is dilute that flue gas sequentially passes through one-level flue gas dilution sample lines, mixing current divider, secondary smoke
Release after sample lines and gas skirt, flow into dilution flue gas analysis unit and implement measurement；Compressed air unit and one-level flue gas dilution
Sample lines are mutually common to the dilution of flue gas with secondary smoke dilution sampling pipeline；System backflush unit is used for the cleaning of system.
10. method as claimed in claim 9, it is characterised in that：When in patrolling survey state, compressed air one-level industry control magnetic valve
Open successively respectively, and any time ensures that only one compressed air one-level industry control magnetic valve is to open, the sample gas gathered
From corresponding flue gas sampling point, and patrol under survey state, two grades of industry control magnetic valves of compressed air are opened, compressed air air inlet
Valve is opened, compressed air blowback closed electromagnetic valve；When in blowback state, all compressed air one-level industry control magnetic valves are closed
Close, two grades of industry control magnetic valves of compressed air are also switched off, and compressed air inlet valve and compressed air blowback magnetic valve are all opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610031662.4A CN105675810B (en) | 2016-01-18 | 2016-01-18 | A kind of monitoring method of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and high-temperature corrosion atmosphere |
Applications Claiming Priority (1)
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004041621B4 (en) * | 2004-08-27 | 2007-08-02 | Testo Ag | Device for analyzing a measuring fluid |
| CN101446417B (en) * | 2008-12-30 | 2010-08-11 | 西安交通大学 | Boiler water-cooling wall high-temperature corrosion on-line monitoring device and method thereof |
| CN101619859B (en) * | 2009-08-17 | 2011-03-16 | 江苏方天电力技术有限公司 | Stratified combustion on-line optimization control system of boiler coal dust and optimization method thereof |
| CN203772607U (en) * | 2014-04-15 | 2014-08-13 | 国家电网公司 | System for measuring content of oxygen in rear smoke channel of boiler |
| CN204215253U (en) * | 2014-11-13 | 2015-03-18 | 南京铭彦科技有限公司 | A kind of flue gas online multipoint acquisition analyses and prediction boiler combustion optimization control system |
| CN204241347U (en) * | 2014-11-29 | 2015-04-01 | 上海北分仪器技术开发有限责任公司 | A kind of Novel wet smoke on-line monitoring system |
| CN204422498U (en) * | 2014-12-31 | 2015-06-24 | 上海北分仪器技术开发有限责任公司 | A kind of Novel flue gas checkout equipment |
| CN204903507U (en) * | 2015-09-02 | 2015-12-23 | 南京电力设备质量性能检验中心 | Water -cooling wall wall atmosphere supervision measurement system is switched on multitube way |
| CN105223046A (en) * | 2015-11-16 | 2016-01-06 | 天津市环境监测中心 | Stationary source flue gas particles dilution method automatic constant speed acquisition method |
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