CN205461808U - SCR denitration catalyst on -line measuring with spout ammonia and optimize automatic regulating system - Google Patents
SCR denitration catalyst on -line measuring with spout ammonia and optimize automatic regulating system Download PDFInfo
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- CN205461808U CN205461808U CN201620220250.0U CN201620220250U CN205461808U CN 205461808 U CN205461808 U CN 205461808U CN 201620220250 U CN201620220250 U CN 201620220250U CN 205461808 U CN205461808 U CN 205461808U
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 80
- 239000003054 catalyst Substances 0.000 title claims abstract description 58
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 107
- 239000003546 flue gas Substances 0.000 claims abstract description 101
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 97
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000007921 spray Substances 0.000 claims description 52
- 238000005507 spraying Methods 0.000 claims description 28
- 230000003068 static effect Effects 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 abstract description 7
- 239000003245 coal Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 11
- 235000019504 cigarettes Nutrition 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 230000008676 import Effects 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 108700018263 Brassica oleracea SCR Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012803 optimization experiment Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a SCR denitration catalyst on -line measuring with spout ammonia and optimize automatic regulating system belongs to the automatic control engineering field of coal -fired power plant. SCR denitration catalyst on -line measuring with spout ammonia and optimize automatic regulating system, including SCR deNOx systems, SCR deNOx systems is including the imported flue, SCR denitration reactor and the exhaust pass that connect gradually, distributed matrix flowmeter, distributed flue gas sampling system I, ammonia injection grid, catalyst layer and distributed flue gas sampling system II set gradually in the SCR denitration reactor, distributing type flue gas sampling system I and distributed flue gas sampling system II respectively with the CEMS headtotail, the CEMS system with the DCS headtotail. The utility model discloses a distributed on -line measuring and the evaluation of denitration catalyst performance and spout the real -time on -line adjustment that ammonia is optimized.
Description
Technical field
This utility model belongs to the automatic control technology field of coal-fired power plant, and the on-line checking and the spray ammonia that relate to a kind of coal-burning power plant SCR denitration optimize automatic regulating system, specifically based on distributed monitoring method, are imported and exported the NO of flue by denitrating catalystxThe denitration performance in each region of catalyst is evaluated in concentration distribution, and combine the velocity flow profile situation of inlet flue duct, by the flow distribution situation of DCS automatic governing ammonia-spraying grid, it is automatically adjusted with the distributed evaluation detection and spray the distributed of ammonia optimization realizing denitrating catalyst performance.
Background technology
The power source of China is still that based on coal-burning power plant at present, and along with the increasingly serious of environment situation and the continuous reinforcement of social environment consciousness, the standard limit of smog release of coal-burning power plant is the strictest.NOxIt is one of coal-burning power plant's major pollutants discharged, in order to make NOxConcentration of emission is up to state standards, and coal-burning power plant's all auxiliary constructions denitration device, be wherein most widely used is exactly SCR denitration technology.Although SCR denitration technology is the most highly developed, but also can there is certain problem in it in running.
The projected life of SCR denitration is generally about 3 years, and the actual motion life-span is affected by many factors in power station environment, having the biggest uncertainty, during the experiment of the measure that current power plant is taked generally CEMS on-line monitoring, denitration performance or shutdown maintenance, the runnability of catalyst is evaluated in catalyst sampling.Although CEMS system achieves NOxThe real time on-line monitoring of concentration, but owing to the sample point of denitration import and export is all at two that position is fixed, is affected by flue gas flow rate and concentration skewness very big, be only capable of substantially demonstrating the denitration efficiency of entirety.Denitration performance cycle of being carried out of experiment is generally half a year or annually, most for the first quarter once, and typically with evaluate catalyst overall denitration performance as target, although distributed measurement can manually be carried out, but the workload expended is too big, and the time interval every time carrying out denitration performance experiment is oversize.The catalyst sampling during the boiler down randomization by zones of different; it it is the denitrating catalyst performance profile that can evaluate zones of different; and the physics and chemical index that catalyst is detailed can be drawn; but the time interval sampled during utilizing blowing out is the most oversize, it is impossible to the out-of-service time of Accurate Prediction catalyst.Denitrating catalyst has maximum probability that the situations such as local stoppages can occur in running; and this local stoppages can only find when boiler down checks; although can suitably adjust the running status of catalyst purge according to stopping state; strengthen local purging; but the effect adjusted just can be examined when also can only wait shutdown inspection next time; so under day-to-day operation state; cannot learn concrete condition and difference that regional inner catalyst runs, the overall performance of catalyst also cannot be to be fully ensured.The reduction of denitrating catalyst performance can directly influence NO in flue gasxConcentration of emission, even can exceed discharge standard.Therefore, in SCR denitration system running, build a set of distributed catalyst performance real-time online detecting system and be just particularly important.
SCR denitration system needs to spray into ammonia in running, with the NO in flue gas under the effect of catalystxIt is removed by reaction.The straying quatity of ammonia and spray ammonia distribution are very important operating index, and spray ammonia is not enough, spray ammonia excess, skewness all can bring than more serious consequence.NO can be directly resulted in during ammonia deficiencyxThe rising of concentration of emission, again can be because of NH during ammonia excess4HSO4The increase of growing amount and cause the blocking of the equipment such as flue downstream air preheater, spray ammonia inequality can cause NO simultaneouslyxConcentration of emission and NH4HSO4The increase of growing amount.Therefore, SCR denitration system being carried out sprays ammonia optimization and spray ammonia distribution adjusts ensureing that the properly functioning of coal-burning power plant has highly important meaning.In the technology that current power plant is used, modal it is through NO before denitrationxConcentration and flue gas flow, automatically adjust the ammonia flow of spray ammonia mother's pipe, although this system can adjust ammonia spraying amount the most automatically, it is apparent that the spray ammonia distribution situation of ammonia-spraying grid cannot be adjusted in conjunction with ammonia slip concentration.Major part power plant also can optimize and revise experiment by spray ammonia and manually to be adjusted spray ammonia distribution, but distributed monitoring all can consume substantial amounts of workload every time, and after adjusting, along with boiler load, damper aperture, NO. every timexThe variation of the factors such as concentration distribution, flue gas flow distribution, ammonia spraying amount required in each region of catalyst is required for correspondingly changing.Power plant carries out spraying ammonia optimization experiment and is generally half a year or annually, and required for catalyst ammonia spraying amount distribution by sky or hour in units of change, so manually carrying out spraying ammonia to optimize and revise the spray ammonia distribution that experiment can only meet under specific run operating mode, and cannot realize spraying ammonia in real time and optimize and revise.Therefore, develop a set of can be in real time according to NO in fluexIt is extremely necessary that distribution situation carries out spraying the on-line control apparatus system optimized and revised of ammonia in time.
The patent of Application No. 201520136198.6 discloses a kind of SCR denitration on-line checking and spray ammonia optimal control device, including DCS controller, DCS controller respectively with flue gas flow instrumentation, catalysagen cigarette side NOxInstrumentation, catalysagen cigarette side oxygen amount instrumentation, catalyst clean cigarette side NOxInstrumentation, spray ammonia regulation valve, DCS engineer station, DCS history station, DCS operator station, NH3Flow instrumentation, catalyst performance calculation server are connected, described flue gas flow instrumentation, catalysagen cigarette side NOxInstrumentation, catalysagen cigarette side oxygen amount instrumentation, catalyst clean cigarette side NOxInstrumentation and NH3Each self-monitoring signal is delivered to DCS controller by flow instrumentation respectively, and valve position feedback signal is delivered to DCS controller by spray ammonia regulation valve, and control signal is delivered to spray ammonia regulation valve by DCS controller.This utility model realizes the on-line continuous to SCR denitrating catalyst performance and detects, instructs according to on-line checking result plant manager catalyst to carry out offline inspection or replacing, optimization spray ammonia automatic regulating system in good time, excess spray ammonia is reported to the police and protected.Obviously, in this utility model, the concentration of NOx only measures in catalysagen cigarette side and catalyst clean cigarette side, it is impossible to monitor NO in real timexDistribution situation；And the Distributed Detection of SCR denitration cannot be realized.
Utility model content
Technical problem to be solved in the utility model is, for the deficiencies in the prior art, thering is provided one SCR denitration on-line checking to optimize automatic regulating system with spray ammonia, the real-time online of distributed on-line checking and evaluation and spray ammonia optimization to realize denitrating catalyst performance regulates.
For solving above-mentioned technical problem, this utility model be the technical scheme is that
SCR denitration on-line checking and spray ammonia optimize automatic regulating system, including SCR denitration system, CEMS system and DCS system, described SCR denitration system includes inlet flue duct, SCR denitration reactor and the exhaust pass being sequentially connected with, distributed matrix effusion meter, distributed flue gas sampling system I, ammonia-spraying grid, catalyst layer and distributed flue gas sampling system II is set gradually in described SCR denitration reactor, described distributed flue gas sampling system I and distributed flue gas sampling system II are connected with CEMS system respectively, and described CEMS system is connected with described DCS system.
Further, described distributed matrix effusion meter is made up of commutator, total head pressure pipe and static pressure pressure pipe.
Further, described distributed flue gas sampling system I is identical with distributed flue gas sampling system II structure, stay tube is propped up including flue gas sampling, flue gas sampling pipe, sampling tube switching device, flue gas sampling heat tracing pipe and heat tracing pipe switching device, it is 1 ~ 3 that described flue gas sampling props up stay tube, uniformly it is located on flue cross section, each described flue gas sampling props up stay tube 10 ~ 15 flue gas sampling pipes of carrying, each described flue gas sampling pipe is arranged on the center of respective sub-areas, described sampling tube switching device is located at the port of export of described flue gas sampling pipe, and be connected with described flue gas sampling heat tracing pipe, the port of export of described flue gas sampling heat tracing pipe arranges heat tracing pipe switching device, described heat tracing pipe switching device is connected with the flue gas sampling heat tracing pipe of described CEMS system.
Further, described ammonia-spraying grid includes spraying ammonia mother pipe, draws some main distribution pipes from described spray ammonia mother's pipe, every described main distribution pipe arranges electric control valve, the end of every described main distribution pipe is divided into some strips distribution pipe, and described sub-distribution pipe is uniformly arranged spray ammonia nozzle.
Further, the spray ammonia region of every described main distribution pipe is corresponding with the sample area of described distributed flue gas sampling system I and distributed flue gas sampling system II.
Further, described catalyst layer is 2 ~ 4 layers.
Compared with prior art, the beneficial effects of the utility model are as follows:
1) this utility model provides a kind of distributed on-line checking of SCR denitration and spray ammonia optimizes automatic regulating system, by this system to the monitoring of SCR denitration operational factor and adjustment, denitration efficiency can be improved significantly, and efficiently reduce the escaping of ammonia, reduce air preheater and the probability of blocking occurs, moreover it is possible to reduce ammonia usage by each region ammonia spraying amount is precisely controlled.
2) by the distributed real-time online evaluation to denitrating catalyst, can be with the service life of Accurate Prediction denitrating catalyst, realize the whole-life cycle fee of denitrating catalyst, and the emergency case that catalyst runs can be monitored, in time catalyst operational factor is adjusted, the service life of proper extension catalyst, it is ensured that the safe and highly efficient operation of SCR denitration system.The distributed evaluation system of catalyst can demonstrate the situations such as catalyst blockage, the inefficacy that regional area occurred, thus the measures such as such as larger catalyst steam partial purging effort can be taked targetedly, ensure the most properly functioning of catalyst regional.
The real-time online of distributed on-line checking and evaluation and spray ammonia optimization that this utility model achieves denitrating catalyst performance regulates, denitration efficiency can be significantly improved, effectively reduce the escaping of ammonia, reduce air preheater and the probability of blocking occurs, realize the whole-life cycle fee of denitrating catalyst, the emergency case that monitoring catalyst runs, the service life of proper extension catalyst, it is ensured that the safe and highly efficient operation of SCR denitration system.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is described in further detail.
Fig. 1 is SCR denitration on-line checking and spray ammonia optimization automatic regulating system structural representation；
Wherein: 1-inlet flue duct；2-distributed matrix effusion meter；3-distributed flue gas sampling system I；4-ammonia-spraying grid；5-catalyst layer；6-distributed flue gas sampling system II；7-exhaust pass；8-sprays ammonia nozzle；9-ammonia-spraying grid flue cross section；10-electric control valve；11-spray ammonia mother pipe；12-flue gas sampling props up stay tube；13-flue gas sampling pipe；14-flue cross section；15-sampling tube switching device；16-flue gas sampling heat tracing pipe；17-heat tracing pipe switching device；18-CEMS system flue gas sampling heat tracing pipe.
Detailed description of the invention
In order to be more fully understood that this utility model, fairly set out content of the present utility model below in conjunction with embodiment further, but protection content of the present utility model is not limited solely to the following examples.In the following description, a large amount of concrete details is given to provide and this utility model being understood the most thoroughly.It will be apparent, however, to one skilled in the art that this utility model can be carried out without these details one or more.
Refering to Fig. 1, SCR denitration on-line checking and spray ammonia optimize automatic regulating system, including SCR denitration system, CEMS system and DCS system, described SCR denitration system includes the inlet flue duct being sequentially connected with, SCR denitration reactor and exhaust pass, distributed matrix effusion meter is set gradually in described SCR denitration reactor, distributed flue gas sampling system I, ammonia-spraying grid, catalyst layer and distributed flue gas sampling system II, described distributed flue gas sampling system I and distributed flue gas sampling system II are connected with CEMS system respectively, described CEMS system is connected with described DCS system.
Coal-fired flue-gas is after economizer is out, it is passed into SCR denitration system from SCR denitration system inlet flue duct 1, and pass sequentially through distributed matrix effusion meter 2, distributed flue gas sampling system I 3, ammonia-spraying grid 4, catalyst layer 5 and distributed flue gas sampling system II 6 within the system, finally imported in air preheater by SCR denitration system exhaust pass 7.
Described distributed matrix effusion meter is made up of commutator, total head pressure pipe and static pressure pressure pipe.
Distributed matrix effusion meter 2 is to improve in order to the velocity flow profile situation that obtains in flue based on common matrix form effusion meter.It is made up of commutator, total head pressure pipe and static pressure pressure pipe on distributed matrix flowmeter structure, only the total head corresponding to each subregion and static pressure will be carried out pressure measurement, obtain the flue gas flow rate distribution of flue cross section.
Described distributed flue gas sampling system I is identical with distributed flue gas sampling system II structure, stay tube is propped up including flue gas sampling, flue gas sampling pipe, sampling tube switching device, flue gas sampling heat tracing pipe and heat tracing pipe switching device, it is 1 ~ 3 that described flue gas sampling props up stay tube, uniformly it is located on flue cross section, each described flue gas sampling props up stay tube 10 ~ 15 flue gas sampling pipes of carrying, each described flue gas sampling pipe is arranged on the center of respective sub-areas, described sampling tube switching device is located at the port of export of described flue gas sampling pipe, and be connected with described flue gas sampling heat tracing pipe, the port of export of described flue gas sampling heat tracing pipe arranges heat tracing pipe switching device, described heat tracing pipe switching device is connected with the flue gas sampling heat tracing pipe of described CEMS system.
Distributed flue gas sampling system I 3 and distributed flue gas sampling system II 6 are structurally identical, and its effect is to measure the NO imported and exported in flue respectivelyxConcentration distribution situation.In a distributed manner as a example by flue gas sampling system II 6, this system is the intermittent sampling apparatus controlled by sampling tube switching device 15 and heat tracing pipe switching device 17, realize, successively by the fume extraction at each flue gas sampling pipe 13 to CEMS system flue gas sampling heat tracing pipe 18, being passed through CEMS system and carrying out NO by the effect of switching devicexConcentration monitor, determines the NO of overall flue in conjunction with the particular location corresponding to each flue gas sampling pipexConcentration is distributed.On structure designs, the flue gas sampling pipe being positioned at same string in each sub regions is placed in same flue gas sampling and props up in stay tube 12, the concrete sampling tube order being passed through in flue gas sampling heat tracing pipe 16 is determined by the effect of sampling tube switching device 15, then determined that the fume sample taken out in different lines is passed through the sampling order in CEMS system flue gas sampling heat tracing pipe 18 by the effect of heat tracing pipe switching device 17, finally realize the sampling successively to each flue gas sampling pipe.Meanwhile, while sampling is bled, successively off-duty flue gas sampling pipe is carried out purge operations, prevent pipeline blockage.Can specifically arrange that on flue cross section 14 1 ~ 3 flue gas sampling props up stay tube 12, each flue gas sampling props up 10 ~ 15 flue gas sampling pipes 13 of carrying in stay tube, and each sampling tube is arranged in the center of respective sub-areas, realizes NO in fluexThe real-time monitoring of concentration distribution.Specific number according to flue gas sampling pipe 13 and flue are about 10 ~ 30min from the concrete distance of CEMS system, the time completing to sample the most in turn.Flue gas sampling pipe number and distributing position that distributed flue gas sampling system I 3 and distributed flue gas sampling system II 6 are selected when implementing want the most corresponding, in order to calculate the SCR denitration denitration performance corresponding to each region.
Described ammonia-spraying grid includes spraying ammonia mother pipe, some main distribution pipes are drawn from described spray ammonia mother's pipe, arranging electric control valve on every described main distribution pipe, the end of every described main distribution pipe is divided into some strips distribution pipe, and described sub-distribution pipe is uniformly arranged spray ammonia nozzle.
Ammonia-spraying grid 4 improves on the basis of common ammonia-spraying grid, concrete difference is that and is equipped with a single electric control valve 10 from each the main distribution pipe that spray ammonia mother's pipe 11 is drawn, it is used for regulating the spray ammonia flow flowing through each main distribution pipe, ammonia, in main distribution pipe enters each sub-distribution pipe, is sprayed in flue by each spray ammonia nozzle 8.Son distribution pipe is arranged on ammonia-spraying grid flue cross section 9.Main distribution pipe is specifically being arranged, and can use 1 ~ 3 mode arranged, and the jet pipe degree of depth corresponding to every string is different, and each row can arrange 10 ~ 15 main distribution pipes.Spray ammonia region corresponding to each main distribution pipe preferably with distributed flue gas sampling system I 3 and distributed flue gas sampling system II 6 in sample area corresponding.
Described catalyst layer is 2 ~ 4 layers.Catalyst layer 5 is NO in the ammonia and flue gas sprayed intoxThe main place of reaction, typically arranges 2 ~ 4 layers, and target is NO in the flue gas making dischargexConcentration reaches corresponding discharge standard.
A NO need to be separately provided at little of CEMSxDensity monitoring system, is used for analyzing successively the NO in each flue gas sampling pipe extractedxConcentration value.It is also required to when analyzing import and export flue is analyzed in turn, therefore completes once to import and export flue NOxTime substantially 20 ~ 60min that concentration distribution monitoring needs, the concrete time depends on flue gas sampling pipe specific number and the flue distance from CEMS system.
The import and export flue NO that CEMS system monitoring arrivesxConcentration distribution values is real-time transmitted in Power Plant DCS System, DCS system carry out making a concrete analysis of and record.In conjunction with velocity flow profile situation in the flue that distributed matrix effusion meter transmits, the specific performance of SCR denitration can be analyzed by Power Plant DCS System, determine denitrating catalyst hydraulic performance decline trend and it may happen that the region of catalyst blockage, thus realize the online evaluation of catalyst denitration performance, and guide the operations such as catalyst carrying out practically, maintenance.
Power Plant DCS is according to the NO of SCR exhaust passxConcentration distribution situation, acts on each electric control valve at ammonia-spraying grid, it is possible to achieve being automatically adjusted of spray ammonia optimization.DCS is by analyzing NO in each sub regions of exhaust passxDeparture degree between concentration and ensemble average concentration, suitably reduces NOxThe motorized adjustment valve opening of main distribution pipe at the ammonia-spraying grid that concentration is on the low side corresponding to region, and suitably increase NOxThe corresponding spray in the higher region of concentration ammonia nozzle motorized adjustment valve opening, makes NOxConcentration distribution situation reaches unanimity on the whole.
NO in conjunction with SCR inlet flue ductxThe ammonia slip concentration situation of concentration and exhaust pass, the spray ammonia total amount of ammonia-spraying grid is controlled and adjusts by DCS system in real time, so that the NO of SCR denitration system exhaust passxConcentration distribution situation and the escaping of ammonia situation reach optimum state in real time, it is to avoid due to all adverse consequencess caused by spray ammonia inequality.
Finally illustrate is, above example is only in order to illustrate the technical solution of the utility model and unrestricted, other amendment or equivalents that the technical solution of the utility model is made by those of ordinary skill in the art, without departing from the spirit and scope of technical solutions of the utility model, all should contain in the middle of right of the present utility model.
Claims (6)
1. SCR denitration on-line checking and spray ammonia optimize automatic regulating system, including SCR denitration system, CEMS system and DCS system, described SCR denitration system includes the inlet flue duct being sequentially connected with, SCR denitration reactor and exhaust pass, it is characterized in that: in described SCR denitration reactor, set gradually distributed matrix effusion meter, distributed flue gas sampling system I, ammonia-spraying grid, catalyst layer and distributed flue gas sampling system II, described distributed flue gas sampling system I and distributed flue gas sampling system II are connected with CEMS system respectively, described CEMS system is connected with described DCS system.
2. SCR denitration on-line checking as claimed in claim 1 and spray ammonia optimize automatic regulating system, it is characterised in that: described distributed matrix effusion meter is made up of commutator, total head pressure pipe and static pressure pressure pipe.
null3. SCR denitration on-line checking as claimed in claim 1 and spray ammonia optimize automatic regulating system，It is characterized in that: described distributed flue gas sampling system I is identical with distributed flue gas sampling system II structure，Stay tube is propped up including flue gas sampling、Flue gas sampling pipe、Sampling tube switching device、Flue gas sampling heat tracing pipe and heat tracing pipe switching device，It is 1 ~ 3 that described flue gas sampling props up stay tube，Uniformly it is located on flue cross section，Each described flue gas sampling props up stay tube 10 ~ 15 flue gas sampling pipes of carrying，Each described flue gas sampling pipe is arranged on the center of respective sub-areas，Described sampling tube switching device is located at the port of export of described flue gas sampling pipe，And be connected with described flue gas sampling heat tracing pipe，The port of export of described flue gas sampling heat tracing pipe arranges heat tracing pipe switching device，Described heat tracing pipe switching device is connected with the flue gas sampling heat tracing pipe of described CEMS system.
4. SCR denitration on-line checking as claimed in claim 1 and spray ammonia optimize automatic regulating system, it is characterized in that: described ammonia-spraying grid includes spraying ammonia mother pipe, some main distribution pipes are drawn from described spray ammonia mother's pipe, on every described main distribution pipe, electric control valve is set, the end of every described main distribution pipe is divided into some strips distribution pipe, and described sub-distribution pipe is uniformly arranged spray ammonia nozzle.
5. SCR denitration on-line checking as claimed in claim 4 and spray ammonia optimize automatic regulating system, it is characterised in that: the spray ammonia region of every described main distribution pipe is corresponding with the sample area of described distributed flue gas sampling system I and distributed flue gas sampling system II.
6. SCR denitration on-line checking as claimed in claim 1 and spray ammonia optimize automatic regulating system, it is characterised in that: described catalyst layer is 2 ~ 4 layers.
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| CN106370770A (en) * | 2016-11-24 | 2017-02-01 | 山西普丽环境工程股份有限公司 | Real fume denitration catalyst performance evaluation device |
| CN106669396A (en) * | 2017-03-28 | 2017-05-17 | 武汉立为工程技术有限公司 | SCR denitration system for boiler |
| CN107449876A (en) * | 2017-09-19 | 2017-12-08 | 国电环境保护研究院 | A kind of reducing agent distributes regulating system |
| CN109100474A (en) * | 2018-09-06 | 2018-12-28 | 南京天创电子技术有限公司 | A kind of SCR catalyst on-line monitoring system and monitoring method |
| CN109107387A (en) * | 2018-09-26 | 2019-01-01 | 汇信盈（北京）智能技术有限公司 | A kind of denitrating system sprays ammonia control method and control system automatically |
| CN109758905A (en) * | 2019-03-05 | 2019-05-17 | 华北电力科学研究院有限责任公司 | The ammonia-gas spraying device and method of a kind of anchor to coal-burning power plant's denitrification catalyst module |
| CN109991046A (en) * | 2019-04-25 | 2019-07-09 | 国电环境保护研究院有限公司 | The NH of SCR reactor3Concentration on-line period measuring device and method |
| CN110568129A (en) * | 2019-09-26 | 2019-12-13 | 北京国电龙源环保工程有限公司 | SCR denitration outlet mixing and partition flue gas NOx concentration detection system and method thereof |
| CN113776888A (en) * | 2021-08-04 | 2021-12-10 | 华电电力科学研究院有限公司 | Denitration catalyst sampling device in operation and testing method |
| CN113952838A (en) * | 2021-09-10 | 2022-01-21 | 国网河北省电力有限公司电力科学研究院 | Ammonia spraying grid automatic optimization and adjustment device and method for SCR flue gas denitration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106370770A (en) * | 2016-11-24 | 2017-02-01 | 山西普丽环境工程股份有限公司 | Real fume denitration catalyst performance evaluation device |
| CN106669396A (en) * | 2017-03-28 | 2017-05-17 | 武汉立为工程技术有限公司 | SCR denitration system for boiler |
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Address after: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee after: Henan jiuyu enpai Power Technology Co., Ltd Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Co-patentee after: State Grid Corporation of China Address before: 450052 No. 85 South Songshan Road, Henan, Zhengzhou Co-patentee before: HENAN ENPAI HIGH-TECH GROUP Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID HENAN ELECTRIC POWER Co. Co-patentee before: State Grid Corporation of China |