CN205679585U - The flow field detecting system of SCR denitration technique - Google Patents
The flow field detecting system of SCR denitration technique Download PDFInfo
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- CN205679585U CN205679585U CN201620516722.7U CN201620516722U CN205679585U CN 205679585 U CN205679585 U CN 205679585U CN 201620516722 U CN201620516722 U CN 201620516722U CN 205679585 U CN205679585 U CN 205679585U
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Abstract
This application discloses the flow field detecting system of a kind of SCR denitration technique, including the first detection device, second detection device and Flow Field Distribution controller, wherein, first detection device includes multiple sampling head and is arranged at the gas approach of SCR reactor, multiple sampling heads of the first detection device are distributed in the diverse location in gas approach cross section, to detect the gas-composition data of gas approach diverse location；Second detection device includes multiple sampling head and is arranged at the exhaust pass of SCR reactor, multiple sampling heads of second detection device are distributed in the exit region that each spray ammonia arm is corresponding in exhaust pass, to detect the gas-composition data in the exit region corresponding to each spray ammonia arm respectively, the gas-composition data of the exhaust pass collected is transmitted to Flow Field Distribution controller by second detection device, Flow Field Distribution controller control the ammonia straying quatity of gas approach internal spray ammonia house steward and/or each spray ammonia arm ammonia straying quatity.
Description
Technical field
The application belongs to gas denitrifying technology field, specifically, relates to a kind of SCR denitration technique flow field detecting system.
Background technology
The development produced along with modern industry and growth in the living standard, atmospheric pollution has become what people extremely paid close attention to ask
Topic.Atmospheric pollution also exists a big problem, nitrogen oxides NOXPollution problem.NOXLight can be caused under the effect of sunlight
Chemical reaction, forms photochemical fog, thus causes serious atmospheric pollution.NOXAtmosphere polluting problem by pay attention to day by day,
It is found that: the injury of health, high-load nitric acid rain, photochemical fog, ozone reduction and some other problem all with
Low concentration of NOXThere is relation, and its hazardness imagination more original than people is much greater.
Denitrating flue gas, refers to the NO generatedXIt is reduced to N2, thus remove the NO in flue gasX, can according to Processing tecchnics
It is divided into wet denitration and Dry denitration.Specifically include that acid absorption process, Alkali absorption method, selective catalytic reduction, selectivity is non-urges
Change reducing process, absorption method, gas ions activation method etc..Wherein, selective catalytic reduction (Selective Catalytic
Reduction, SCR) it is to use vertical catalyst reaction tower and anhydrous ammonia, from coal fired combustion and the flue gas of coal-burning power plant
Middle removing nitrogen oxides.Specially use ammonia (NH3) as reactant, the flue gas discharged with boiler passes through catalyst after mixing
Layer, at catalyst layer, will remove NO under the effect of catalystX, reduction decomposition becomes harmless nitrogen (N2) and water (H2O)。
At present in SCR technique, the control only one of which total valve aperture for ammonia spraying amount controls to spray ammonia flow, main valve
Branch's spray ammonia pipeline behind the door only has hand-operated valve to adjust aperture, it is impossible to realize the subregional online finely regulating of flue.Mesh
The subject matter of front control strategy is, the single measuring point of dependence is as regulation target, and the degree of accuracy of single measuring point and representativeness are poor, also
Do not consider the emission distribution in whole flue cross section；And in order to reach unit emission limit requirement, ammonia spraying amount controls " rather to take
How not lack " mode (in order to make the NO of dischargeXConcentration is up to standard, sprays into ammonia as much as possible and makes more NOXIt is reduced decomposition, makes
NOXEmission compliance), easily cause local spray ammonia excess.Although SCR exports NOXConcentration of emission up to standard, but too much spray
Ammonia amount is converted into the escaping of ammonia and enters air preheater, with the entrance acid medium of air preheater, steam reaction, generates
NH4HSO4Air preheater is blocked Deng harmful substance, cause the serious consequence such as equipment damage and unit outage.
Utility model content
In view of this, this application provides the flow field detecting system of a kind of SCR denitration technique, in order to solve in prior art
The detection data deficiency of test point is representative, the technical problem the lowest to the reference value of ammonia spraying amount control.
In order to solve above-mentioned technical problem, this application discloses the flow field detecting system of a kind of SCR denitration technique, including
One detection device, second detection device and Flow Field Distribution controller, wherein, described first detection device includes multiple sampling head also
Being arranged at the gas approach of SCR reactor, multiple sampling heads of described first detection device are distributed in described gas approach cross section
Diverse location, to detect the gas-composition data of described gas approach diverse location, described first detection device will collect
The gas-composition data transmission of described gas approach to described Flow Field Distribution controller, described Flow Field Distribution controller control
Make the ammonia straying quatity of described gas approach internal spray ammonia arm；Described second detection device includes multiple sampling head and is arranged at
The exhaust pass of SCR reactor, multiple sampling heads of described second detection device are distributed in each spray ammonia arm described described
Exit region corresponding in exhaust pass, to detect the gas in the exit region corresponding to each described spray ammonia arm respectively
Compositional data, the gas-composition data of the described exhaust pass collected is transmitted and divides to described flow field by described second detection device
Cloth controller, by described Flow Field Distribution controller control described gas approach internal spray ammonia house steward ammonia straying quatity and/or
Each spray ammonia arm ammonia straying quatity.
Multiple sampling heads of described first detection device are distributed in the covering of described gas approach each spray ammonia arm internal
Region, to detect the gas-composition data in the overlay area of each described spray ammonia arm respectively.
Described first detection device and second detection device also include: flue gas analyzer and at least with spray ammonia arm quantity phase
When sampling tube；Described sampling head one end perforate is also arranged in flue, and the other end connects with described sampling tube, described sampling tube
Connect with the valve of described flue gas analyzer, make the flue gas collected enter described flue gas analyzer through described sampling tube.
Every described sampling tube connects with the described sampling head of predetermined number.
Each described sampling head connects with sampling tube independent with respectively.
Described sampling tube is parallel to flue cross-wise direction and arranges；Described sampling head and sampling tube are fixedly mounted on by support
In flue, or, it being arranged on the support of stepping equipment, described stepping equipment drives described sampling tube to march to described flue
Different depth.
Described sampling tube is perpendicular to flue cross-wise direction and arranges；Described sampling head and sampling tube are fixedly mounted on by support
In flue, or, it being arranged on the support of stepping equipment, described stepping equipment drives described sampling tube to march to described flue
Different depth.
It is described stepping equipment and fixing described sampling tube and the support of sampling head by rake soot-blower retrofit；Described rake
Formula soot blower includes nozzle, rake pipe, central canal and gear walking case；By described rake pipe as the support of fixing described sampling tube,
And connect with described central canal；By described nozzle as sampling head, by described gear walking case as stepping equipment；Described center
Pipe and rake pipe march to the different depth of described flue under the drive of gear walking case, are arranged on described rake pipe by described
Nozzle gather flue gas.
Described sampling tube is communicated to measure air chamber through electromagnetic valve, and described measurement air chamber is externally provided with purge pump and air pump, real
Now for purging and the flue gas sampling of each sampling tube；The flue gas sample of extraction is detected by described flue gas analyzer, and
Detection data are transmitted to Distributed Control System.
Compared with prior art, the application can obtain and include techniques below effect: by the first detection of gas approach
The second detection device of device and exhaust pass is from the gas-composition data of multiple positions detection gas approach, according to testing result
Adjust the ammonia spraying amount of each spray ammonia arm, improve the reference value of detection data, the control more accurate and effective to ammonia spraying amount.
Certainly, the arbitrary product implementing the application must be not necessarily required to reach all the above technique effect simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing further understanding of the present application, constitutes the part of the application, this Shen
Schematic description and description please is used for explaining the application, is not intended that the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the block diagram of the flow field detecting system of a kind of SCR denitration technique that the embodiment of the present application provides；
Fig. 2 is first detection device and the block diagram of second detection device of the embodiment of the present application；
Fig. 3 is the structural representation that the embodiment of the present application utilizes rake soot-blower retrofit to be the first detection device；
Fig. 4 is first detection device and the subsidiary loop schematic diagram of second detection device of the embodiment of the present application.
Detailed description of the invention
Describe presently filed embodiment in detail below in conjunction with drawings and Examples, thereby how the application is applied
Technological means solves technical problem and reaches the process that realizes of technology effect and can fully understand and implement according to this.
The embodiment of the present application provides the flow field detecting system of a kind of SCR denitration technique, first arranged at gas approach
Detection device and all include that multiple sampling head, multiple sampling heads are distributed in gas approach and cut at the second detection device of exhaust pass
Face and the diverse location in exhaust pass cross section, detect the gas-composition data of diverse location and testing result be back to stream
Field distribution controller, is controlled the ammonia straying quatity of gas approach internal spray ammonia arm, improves inspection by Flow Field Distribution controller
Surveying the representativeness of data, the control to ammonia straying quatity is more accurate, in hgher efficiency.
Fig. 1 is the flow field detecting system of a kind of SCR denitration technique that the embodiment of the present application provides, including the first detection device
20, Flow Field Distribution controller 21 and second detection device 22.First detection device 20 is arranged at the entrance cigarette of SCR reactor
Road, including multiple sampling heads, these sampling heads are distributed in the diverse location of gas approach, from multiple diverse locations of gas approach
Gather the flue gas in gas approach and detect.First detection device 20 communicates to connect with Flow Field Distribution controller 21, will
The gas-composition data detected is sent to Flow Field Distribution controller 21.Flow Field Distribution controller regulates according to gas-composition data
The valve opening of spray ammonia arm, reaches to regulate the purpose of ammonia straying quatity.
Gas-composition data includes the data such as ammonia concentration, nitrous oxides concentration, oxygen amount, sentences according to gas-composition data
Whether the ammonia nitrogen mol ratio distribution in disconnected whole flue cross section equalizes.In flue, ammonia nitrogen mol ratio distributing equilibrium is as principle, both protects
Card has enough ammonias to react with nitrogen oxides, also controls ammonia amount the most too much, prevents too much the escaping of ammonia, because of
After entering air preheater for ammonia, NH can be generated with the entrance acid medium of air preheater, steam reaction4HSO4Etc. having
Pest matter and block air preheater.
Flow Field Distribution controller 21 can be by the most integrated, it is also possible to is integrated in Distributed Control System (Distributed
Control System, DCS) in.
The second detection device 22 of flow field detecting system also includes multiple sampling head, is arranged at the outlet of SCR reactor
Flue.Multiple sampling heads of this second detection device 22 are distributed in the outlet area that each spray ammonia arm is corresponding in exhaust pass
Territory, to detect the gas-composition data in the exit region corresponding to each spray ammonia arm respectively.The most each sampling head is the most right
Answering a spray ammonia arm, exhaust pass is also divided into multiple subregion simultaneously, each spray ammonia arm is except corresponding at gas approach
Outside one subregion, at an exhaust pass also corresponding subregion.Each sampling head of second detection device detects it at outlet cigarette
The gas-composition data of subregion corresponding to road, to determine whether the nitrous oxides concentration in each subregion reaches environmental protection standard, with
And whether ammonia concentration exceedes preset standard, testing result is back to Flow Field Distribution controller 21.Flow Field Distribution controller 21
The testing result returned according to each sampling head, controls the valve opening of the spray ammonia arm corresponding with sampling head, reaches to control
The purpose of the ammonia concentration in mouth flue correspondence subregion, it is achieved that ammonia straying quatity and the corresponding subregion thereof to each spray ammonia arm
The accurate control of interior ammonia concentration.Control to the valve opening of each spray ammonia arm is with the first detection device and the second inspection
The testing result surveying device is common foundation, to take into account gas approach while that the gas of exhaust pass discharge meeting preset standard
The ammonia nitrogen mol ratio distributing equilibrium in cross section.
The distributed data of each gas componant of exhaust pass, flow field is gathered by the second detection device 22 being arranged on exhaust pass
Distribution control unit 21 determines whether the nitrous oxides concentration of discharge gas reaches environmental protection standard.When the concentration of nitrogen oxides is not up to
During environmental protection standard, increasing the valve opening of spray ammonia house steward, increase ammonia sprays into total amount, has made more ammonia participate in denitration anti-
Should, reduce the purpose of the nitrous oxides concentration of discharge gas.When the concentration of nitrogen oxides has reached environmental protection standard, and ammonia
When concentration is more than preset standard, the valve opening of spray ammonia house steward can be reduced, reduce ammonia and spray into the effect of total amount.
In one embodiment, multiple sampling heads of the first detection device 20 are distributed in gas approach each spray ammonia internal and prop up
The overlay area of pipe, to detect the gas-composition data in the overlay area of each spray ammonia arm respectively.I.e. first detection device
The sampling head of 20 is correspondingly arranged with spray ammonia arm, and each sampling head is responsible for gathering the gas of the spray ammonia arm institute overlay area of its correspondence
Body compositional data.Covered the effective range in each region according to spray ammonia arm, SCR inlet flue is divided into some subregions, and
Obtain the online data of the constituent concentrations such as the nitrogen oxides in these subregions, ammonia, oxygen.Flow Field Distribution controller 21 is according to often
The gas-composition data of individual sampling head collection controls the valve opening of the spray ammonia arm of its correspondence, it is achieved the online subregion of ammonia spraying amount
Accurately control.
In above-described embodiment first detection device and second detection device as in figure 2 it is shown, include multiple sampling head 10, adopt
One end 101 opening of sample head, the other end 102 connects with sampling tube 11, and sampling tube 11 connects with the valve of flue gas analyzer 12.Adopt
One end 101 of sample head opening is arranged in flue, and flue gas enters sampling head 10 from opening and arrives flue gas through sampling tube 11 and divide
Analyzer 12, is analyzed the constituent concentration of flue gas by flue gas analyzer 12.The sampling head 10 distribution on sampling tube 11 is permissible
Being uniformly or non-uniformly to be distributed, sampling tube 11 can be drawn from furnace wall, is communicated to flue gas analyzer 12.
In SCR denitration technique, this flue gas inspection device may be used for detecting the ammonia of sampling head 10 position, nitrogen oxygen
The constituent concentrations such as compound, oxygen amount, carbon monoxide (CO), to assist Distributed Control System (Distributed Control
System, DCS) control ammonia in SCR reactor and spray into total amount and the ammonia straying quatity of each spray ammonia arm.
In one embodiment, every described sampling tube connects with the sampling head of predetermined number, and this predetermined number is more than one.
Such as, every sampling tube and ten sampling head connections, i.e. it is provided with ten sampling heads on this sampling tube and comes respectively from diverse location
Gathering flue gas sample, if this detection device has three sampling tubes, this detection device can be from the 30 of flue cross section difference
Collecting sample is carried out in position.The quantity of sampling tube can be at least suitable with the spray ammonia arm quantity of SCR reactor inlet flue, in order to
Gather the region that difference spray ammonia arm is covered.Therefore, according to the size in flue cross section, the quantity of sampling tube can be set with every
The quantity of the sampling head of root sampling tube connection.All sampling heads can be evenly distributed on sampling tube, to flue inside cigarette
The collection of destiny evidence more equalizes.
This mode of communicating can be referred to as multichannel mixed type, and the flue gas sample of the most multiple sampling head collections is blended in one
Rise, enter flue gas analyzer through same sampling tube, be more suitable for test point less, need to obtain the detection field of average data
Scape, increases the representativeness gathering data.
Additionally, another mode of communicating is referred to as independent sample type, the flue gas of the most each sampling head collection is adopted through independent
Sample pipe enters flue gas analyzer, is more suitable for test point many, needs to obtain the detection scene of the detailed data of each subregion.Example
As, the region covered for each spray ammonia arm is respectively provided with independent test point, such that it is able to separately detect each spray
Ammonia concentration in ammonia arm institute overlay area or nitrous oxides concentration.
The sampling tube of detection device can be parallel to flue cross section and arrange, or is perpendicular to the setting of flue cross section.Work as sampling
Pipe is parallel to flue cross section when arranging, and is suitable for using fixedly mounted mode, and sampling head and sampling tube are fixedly mounted by support
In flue, it is adaptable to need the scene that fixed position is detected for a long time, it is possible to it is used On-line Control pattern.
When sampling tube be perpendicular to flue cross section arrange time, be suitable for using portable (portable) mounting means, sampling tube and
Sampling head is arranged on the support of stepping equipment, can move survey with the controlled manner such as special time, the degree of depth in flue
Amount, it is adaptable to the occasion such as interim measurement, optimization Test.Controlled owing to inserting the degree of depth of flue, by increasing the survey of different depth
Amount number of times, can obtain the measurement result more than sampling head number integral multiple, so can be at needs more accurate subregion concentration information
Time use.In view of provisional, portable measurement demand, sampling tube uses sampling tube when being longitudinally arranged to facilitate unit operation
Tested flue is inserted by temporary detecting hole.
For SCR reactor, use the detection device of portable (portable), the i.e. first detection at its gas approach
Device is preferably the detection device of portable (portable), such that it is able to examine the overlay area of each spray ammonia arm respectively
Survey, and the whole flue gas cross section many groups measured value in the different flue degree of depth can be obtained, to each spray ammonia arm ammonia spraying amount
Control more accurate, make the ammonia nitrogen mol ratio distribution in whole flue cross section more equalize.And can use fixing at its exhaust pass
The detection device of formula, i.e. second detection device are preferably fixed detection device, are beneficial to determine what SCR reacted at ad-hoc location
After nitrous oxides concentration whether meet environmental protection standard, and according to the spray ammonia total amount of testing result regulation spray ammonia house steward.
In one embodiment, the stepping equipment in portable (portable) mounting means and fixed sample pipe and sampling
The support of head can be realized by transformation rake soot blower.It is pre-that rake soot blower is mainly used in cleaning fin type heating surface, air
Hot device fume side heating surface and SCR reactor.Soot blowing element is soot blowing rake, by central canal and some equipped with multiple spies
The arm composition of different nozzle.From nozzle, the air-flow of injection can be clean by the space purging covered.The central canal rear end of soot blowing rake
It is connected with outer tube.Outer tube is driven motion by the gear walking case of movement on crossbeam.Soot blower valve by fixing inner tube to
Blowing pipe provides blowing medium.Rake soot blower, as it is shown on figure 3, most power plant is owing to considering that catalyst safety runs, is joined
The rake soot blower put does not comes into operation, the grid type rake pipe of this equipment, can be after appropriate reconstruction, as detection device
Grid type sampling tube support use, it is also possible to design independent rack support sampling tube；And its gear walking case drives center
Pipe and the rake pipe characteristic that different depth is advanced in flue, it is possible to achieve the nitrogen of SCR inlet flue cross section diverse location is aoxidized
The measurement of concetration of thing.Rake soot blower includes nozzle, rake pipe, central canal and gear walking case；By nozzle as sampling head and
Arranging sampling tube in rake pipe, rake pipe connects with central canal, and central canal marches to the difference of flue under the drive of gear walking case
The degree of depth.
By the transformation to rake pipe, a horizontal rake pipe can design several sampling tubes, simultaneously (to patrol survey side
Formula) complete flue gas sampling and the measurement of multiple sampled points under an insertion depth.Several values under the same degree of depth are measured
After, gear walking case drive whole detection probe to advance to another degree of depth, after putting in place, resampling measures all sampled points
Smoke components concentration.So, the subregion composition concentration measurement more than sampling tube integral multiple on whole flue cross section can be obtained.
The function details such as the travel depth of whole detection device, detection time, can have been programmed by control system, have made whole
Individual detection device more rationally Effec-tive Function.
Sampling tube is connected by valve with flue gas analyzer, and every sampling tube is respectively mounted electromagnetic valve, it is possible to achieve independently adopt
The switching of sample return controls.Within the electromagnetic valve of all sampling tubes can be packaged in a solenoid valve box, as shown in Figure 4, institute
Sampling tube is had to be communicated to measure air chamber through solenoid valve box.Measure and design air pump, purge pump outside air chamber, it is achieved blowing of each sampling tube
The fume extraction of the purging and sample lines of sweeping, measure air chamber is drawn.
Such as, the control flow of this detection device is as follows:
(1) after system start-up, initially purging: all sampling tube electromagnetic valves are opened, and blow down valve is opened, purge pump runs
1 minute, purge；
(2) sampling: close all sampling tube electromagnetic valves；Close purge pump；Open the electromagnetic valve of X road sampling tube, start
Air pump, completes the smoke sampling of X road sampling tube；
(3) measure: open the measurement valve of flue gas analyzer, measure gauge outfit and connect with X road sampler, after stable reading
Complete the measurement of sampling；Measure signal and send into DCS；
(4) blowback: stop air pump, closes extraction valve；Drive blow down valve, start purge pump, purge 30 seconds；
(5) cycle sampling, measurement: return step (2)；
(6) out of service: to open all sampling tube electromagnetic valves, stop air pump and close extraction valve, open blow down valve, start purging
Pump (stand-by heat, purging prevents blocking always).
More than control process to complete to control with DCS, it is also possible to be controlled with PLC or on-the-spot embedded device, depending on
Depending on different application occasion, mounting means.After detection data complete DCS passback, denitrating system can be realized in operator station
Online Flow Field Distribution data show function in real time, such as SCR inlet flue ammonia concentration Subarea detecting data, SCR inlet flue
Nitrous oxides concentration Subarea detecting data, SCR exhaust pass nitrous oxides concentration Subarea detecting data, SCR exhaust pass ammonia
Concentration Subarea detecting data and the display of other gas componants (such as oxygen, carbon monoxide etc.) detection data.
As employed some vocabulary in the middle of description and claim to censure specific components.Those skilled in the art should
It is understood that hardware manufacturer may call same assembly with different nouns.This specification and claims are not with name
The difference claimed is used as distinguishing the mode of assembly, but is used as the criterion distinguished with assembly difference functionally.As logical
" comprising " mentioned in the middle of piece description and claim is an open language, therefore should be construed to " comprise but do not limit
In "." substantially " referring in receivable range of error, those skilled in the art can solve described in the range of certain error
Technical problem, basically reaches described technique effect.Additionally, " coupling " word comprises any directly and indirectly electric property coupling at this
Means.Therefore, if a first device is coupled to one second device described in literary composition, then representing described first device can direct electrical coupling
It is connected to described second device, or is indirectly electrically coupled to described second device by other devices or the means that couple.Description
Subsequent descriptions is to implement the better embodiment of the application, for the purpose of right described description is the rule so that the application to be described,
It is not limited to scope of the present application.The protection domain of the application is when being as the criterion depending on the defined person of claims.
Also, it should be noted term " includes ", " comprising " or its any other variant are intended to nonexcludability
Comprise, so that include that the commodity of a series of key element or system not only include those key elements, but also include the most clearly
Other key elements listed, or also include the key element intrinsic for this commodity or system.In the feelings not having more restriction
Under condition, statement " including ... " key element limited, it is not excluded that in the commodity including described key element or system also
There is other identical element.
Described above illustrate and describes some preferred embodiments of the application, but as previously mentioned, it should be understood that the application
Be not limited to form disclosed herein, be not to be taken as the eliminating to other embodiments, and can be used for other combinations various,
Amendment and environment, and can in utility model contemplated scope described herein, by above-mentioned teaching or the technology of association area or
Knowledge is modified.And the change that those skilled in the art are carried out and change are without departing from spirit and scope, the most all should be
In the protection domain of the application claims.
Claims (9)
1. the flow field detecting system of a SCR denitration technique, it is characterised in that include the first detection device, second detection device
With Flow Field Distribution controller, wherein, described first detection device includes multiple sampling head and is arranged at the entrance cigarette of SCR reactor
Road, multiple sampling heads of described first detection device are distributed in the diverse location in described gas approach cross section, enter described in detection
The gas-composition data of mouthful flue diverse location, the gas componant of described gas approach that described first detection device will collect
Data transmission, to described Flow Field Distribution controller, is controlled described gas approach internal spray ammonia by described Flow Field Distribution controller and props up
The ammonia straying quatity of pipe；
It is corresponding in described exhaust pass that multiple sampling heads of described second detection device are distributed in each spray ammonia arm described
Exit region, to detect the gas-composition data in the exit region corresponding to each described spray ammonia arm respectively, described
The gas-composition data of the described exhaust pass collected is transmitted to described Flow Field Distribution controller, by described by two detection devices
Flow Field Distribution controller controls the ammonia straying quatity of described gas approach internal spray ammonia house steward and/or each spray ammonia arm ammonia spray
Enter amount.
Flow field the most according to claim 1 detecting system, it is characterised in that multiple sampling heads of described first detection device
It is distributed in the overlay area of described gas approach each spray ammonia arm internal, to detect the covering of each described spray ammonia arm respectively
Gas-composition data in region.
Flow field the most according to claim 1 detecting system, it is characterised in that described first detection device and the second detection dress
Put and also include: flue gas analyzer and at least suitable with spray ammonia arm quantity sampling tube；Described sampling head one end perforate is also arranged
In flue, the other end connects with described sampling tube, and described sampling tube connects with the valve of described flue gas analyzer, makes to collect
Flue gas through described sampling tube enter described flue gas analyzer.
Flow field the most according to claim 3 detecting system, it is characterised in that every described sampling tube and the institute of predetermined number
State sampling head connection.
Flow field the most according to claim 3 detecting system, it is characterised in that each described sampling head respectively with an independence
Sampling tube connection.
Flow field the most according to claim 3 detecting system, it is characterised in that described sampling tube is parallel to flue cross-wise direction
Arrange；Described sampling head and sampling tube are fixedly mounted in flue by support, or, it is arranged on the support of stepping equipment,
Described stepping equipment drives described sampling tube to march to the different depth of described flue.
Flow field the most according to claim 3 detecting system, it is characterised in that described sampling tube is perpendicular to flue cross-wise direction
Arrange；Described sampling head and sampling tube are fixedly mounted in flue by support, or, it is arranged on the support of stepping equipment,
Described stepping equipment drives described sampling tube to march to the different depth of described flue.
8. according to the flow field detecting system described in claim 6 or 7, it is characterised in that be described step by rake soot-blower retrofit
Enter equipment and fixing described sampling tube and the support of sampling head；
Described rake soot blower includes nozzle, rake pipe, central canal and gear walking case；
By described rake pipe as the support of fixing described sampling tube, and connect with described central canal；By described nozzle as sampling
Head, by described gear walking case as stepping equipment；Described central canal and rake pipe march to institute under the drive of gear walking case
State the different depth of flue, gather flue gas by the described nozzle being arranged on described rake pipe.
Flow field the most according to claim 3 detecting system, it is characterised in that described sampling tube is communicated to measure through electromagnetic valve
Air chamber, described measurement air chamber is externally provided with purge pump and air pump, it is achieved for purging and the flue gas sampling of each sampling tube；Institute
State flue gas analyzer the flue gas sample of extraction is detected, and detection data are transmitted to Distributed Control System.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404390A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of SCR denitration device and its working method controlling the escaping of ammonia rate |
| CN110426249A (en) * | 2019-08-06 | 2019-11-08 | 无锡威孚力达催化净化器有限责任公司 | The test macro and method of Multi probe sampling apparatus, ammonia mixture homogeneity |
-
2016
- 2016-05-31 CN CN201620516722.7U patent/CN205679585U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404390A (en) * | 2019-07-12 | 2019-11-05 | 华电电力科学研究院有限公司 | A kind of SCR denitration device and its working method controlling the escaping of ammonia rate |
| CN110426249A (en) * | 2019-08-06 | 2019-11-08 | 无锡威孚力达催化净化器有限责任公司 | The test macro and method of Multi probe sampling apparatus, ammonia mixture homogeneity |
| CN110426249B (en) * | 2019-08-06 | 2022-05-20 | 无锡威孚力达催化净化器有限责任公司 | Multi-probe sampling device, and ammonia gas mixing uniformity testing system and method |
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Effective date of registration: 20180816 Address after: 061010 313, 3 floor, 4 building, Cangzhou science and Technology Park, Cangzhou high tech Zone, Cangzhou, China Patentee after: Hebei train of thought Technology Co., Ltd. Address before: 050023 2, unit 503, 30 Donggang Road, Yuhua District, Shijiazhuang, Hebei, 503 Patentee before: Xing Hongtao |