CN110045054A - A kind of method of SCR denitration life appraisal and prediction - Google Patents
A kind of method of SCR denitration life appraisal and prediction Download PDFInfo
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- CN110045054A CN110045054A CN201910210820.6A CN201910210820A CN110045054A CN 110045054 A CN110045054 A CN 110045054A CN 201910210820 A CN201910210820 A CN 201910210820A CN 110045054 A CN110045054 A CN 110045054A
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- G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
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Abstract
The present invention relates to the methods of a kind of SCR denitration life appraisal and prediction, belong to industrial waste gas purifying environmental protection and energy field.The present invention includes the following steps: catalyst laboratory performance detection, denitrification apparatus performance assessment and optimization and denitrification apparatus on-line operation Parameter analysis and fitting；The performance parameter of catalyst itself is grasped by regularly catalyst laboratory performance detection, irregular denitrification apparatus performance assessment is instructed according to performance test results, carry out denitrification apparatus performance Optimization Work when necessary, so that it is guaranteed that catalyst operation conditions is normal, pass through analysis denitrification apparatus on-line operation parameter on this basis, and be fitted unit and contribute at full capacity, set ammonia slip concentration variation tendency under denitration efficiency, thus accurate evaluation and prediction catalyst life expiration time.
Description
Technical field
The present invention relates to the methods of a kind of SCR denitration life appraisal and prediction, belong to industrial waste gas purifying environmental protection
And energy field.
Background technique
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas pollutant
Discharge is an important process of China's control atmosphere pollution.Most widely used current coal-fired plant flue gas denitration is selectivity
Catalysis reduction (SCR) denitration technology, and catalyst is the core place of SCR denitration operation.With denitrification apparatus runing time
Extend, due to blocking, abrasion, poisoning etc., the performance of denitrating catalyst gradually decays, when catalyst performance can meet it is de-
When nitre device service requirement, then need to carry out catalyst installation/replacement/reproduction operation.
Therefore the service life of accurate evaluation and prediction catalyst is most important for the reliable and stable operation of denitrification apparatus, becomes
The important research direction of current coal-fired flue gas denitration technical field.
Based on above-mentioned situation and status, the present invention proposes that one kind covers catalyst laboratory performance detection, denitrification apparatus
Can assess and optimize and denitrification apparatus on-line operation Parameter analysis and fitting three parts action catalyst life assess
With prediction technique, has the characteristics that system, accurate, strong operability, significant environmental benefit and economic benefit can be generated.
Patent related to the present invention, such as the CN104318120A --- " judgment method of SCR denitration system catalyst life
And device ", it is by the way that the data of catalyst operating parameter and expert database are fitted calculating, to judge SCR denitration
The service life of catalyst, but due to can not effectively represent denitrification apparatus actual motion effect only with laboratory testing parameter, for
The service life of denitrating catalyst practical application can not carry out accurately assessing and predicting.
For another example CN106248864B --- " a kind of SCR denitration life prediction side based on magnanimity operation data
Method ", it is by being filtered, extracting by magnanimity operation data generated in denitrification apparatus actual moving process and function is intended
It closes, to predict the service life of catalyst.But due to only with on-line operation data, lack the assessment to denitrification apparatus operating status with
Optimization, can not accurate evaluation and prediction denitrating catalyst itself service life.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of de- for current SCR
The denox catalyst service life can not accurate evaluation and predict problem SCR denitration life appraisal and prediction method.
Technical solution used by the present invention solves the above problems is: the SCR denitration life appraisal and prediction
Method, it is characterized in that: described method includes following steps: catalyst laboratory performance detection, denitrification apparatus performance assessment with
Optimization and denitrification apparatus on-line operation Parameter analysis and fitting；It is urged by the grasp of regularly catalyst laboratory performance detection
The performance parameter of agent itself, instructs irregular denitrification apparatus performance to assess according to performance test results, carries out when necessary de-
Nitre device performance Optimization Work, so that it is guaranteed that catalyst operation conditions is normal, it is online by analysis denitrification apparatus on this basis
Operating parameter, and be fitted unit and contribute at full capacity, set ammonia slip concentration variation tendency under denitration efficiency, thus accurate evaluation
With prediction catalyst life expiration time.
Further, the content of catalyst laboratory performance detection include the compression strength of catalyst, it is tear strength, main
The physicochemical properties such as chemical component and denitration efficiency, the escaping of ammonia, SO2/SO3The operational characteristiies parameter such as conversion ratio, and in catalyst
Shut down sample phase, catalyst blockage, abrasion condition in site inspection denitrification apparatus, so that it is determined that catalyst performance amendment system
Number.
Further, when catalyst laboratory performance test results or denitrification apparatus actual operating state are deposited when abnormal,
Carry out denitrification apparatus performance evaluation work, assessment content include test unit at full capacity under operating condition the denitration efficiency of denitrification apparatus with
The escaping of ammonia.
Further, it is still filled with denitration after catalyst laboratory performance test results are multiplied by catalyst performance correction factor
It includes online spray ammonia that performance evaluation result, which is set, there are denitrification apparatus performance Optimization Work, optimization content when larger difference, is then carried out
Optimization, off-line maintenance maintenance and the transformation of necessary flow field.
Further, when catalyst laboratory performance test results show the compression strength of catalyst, tear strength, main
When chemical component compares last testing result and significant difference occurs, reason, and combined catalyst operational characteristic must be analyzed in time
Testing result variation tendency sets catalyst life correction factor.
Further, under the conditions of determining that denitrating catalyst is in accidental conditions, fitting unit is contributed at full capacity, is set
The ammonia slip concentration variation tendency under denitration efficiency is determined, under normal circumstances using ammonia slip concentration 3ppm as critical value, according to fitting
Catalyst life expiration time is assessed and predicted to curve and catalyst life correction factor.
Further, such as ammonia slip concentration online monitoring data inaccuracy, then can using ammonia consumption, exhaust gas volumn and into
Exit NOx concentration monitoring data are accordingly converted:
Wherein, CslipNH3For ammonia slip concentration, mg/m3；GNH3For ammonia consumption, kg/h；Q is exhaust gas volumn, m3/h；CNOx,inFor
Denitrification apparatus inlet NOx concentration, mg/m3；CNOx,outFor denitration outlet NOx concentration, mg/m3；MNH3For NH3Mole matter
Amount, g/mol；MNO2For NO2Molal weight, g/mol；Ammonia slip concentration is carried out according to denitrification apparatus assessment result when necessary
Amendment.
It compared with prior art, being capable of effective integration catalyst reality the invention has the following advantages that by using the above method
Room performance test results, denitrification apparatus performance assessment and optimum results and denitrification apparatus on-line operation parameter are tested, is accurately commented
Estimate and predict catalyst life, effectively instructs the management works such as installation, replacement, the regeneration of catalyst, therefore there is good ring
Guarantor, economic benefit and broad application prospect.
Detailed description of the invention
Fig. 1 is the flow diagram of the SCR denitration life appraisal of the embodiment of the present invention and the method for prediction.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
It is shown in Figure 1, it should however be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to match
The revealed content of specification is closed, so that those skilled in the art understands and reads, is not intended to limit the invention implementable
Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size,
In the case where not influencing the effect of present invention can be generated and the purpose that can reach, should all still fall in disclosed technology
In the range of appearance can cover.Meanwhile if with reference such as "upper", "lower", "left", "right", " centre " and " one " in this specification
Term, be merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or
Adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
The method of SCR denitration life appraisal in the present embodiment and prediction, includes the following steps: catalyst experiment
Room performance detection, denitrification apparatus performance assessment and optimization and denitrification apparatus on-line operation Parameter analysis and fitting；By regular
Catalyst laboratory performance detection grasp the performance parameter of catalyst itself, it is irregular de- according to performance test results guidance
The assessment of nitre device performance, carries out denitrification apparatus performance Optimization Work, so that it is guaranteed that catalyst operation conditions is normal, herein when necessary
On the basis of by analysis denitrification apparatus on-line operation parameter, and be fitted that unit is contributed at full capacity, the ammonia that sets under denitration efficiency is escaped
Ease concentration variation tendency, thus accurate evaluation and prediction catalyst life expiration time.
In the present embodiment, the content of catalyst laboratory performance detection mainly includes the compression strength of catalyst, wears by force
The physicochemical properties such as degree, main chemical compositions and denitration efficiency, the escaping of ammonia, SO2/SO3The operational characteristiies parameter such as conversion ratio, and
Catalyst shuts down sample phase, catalyst blockage, abrasion condition in site inspection denitrification apparatus, so that it is determined that catalyst performance is repaired
Positive coefficient.
In the present embodiment, when catalyst laboratory performance test results or denitrification apparatus actual operating state have exception
When, carry out denitrification apparatus performance evaluation work, assessment content mainly include test unit at full capacity under operating condition denitrification apparatus it is de-
Nitre efficiency and the escaping of ammonia；After catalyst laboratory performance test results are multiplied by catalyst performance correction factor still with denitrification apparatus
Performance evaluation result is mainly included in line spray there are denitrification apparatus performance Optimization Work, optimization content when larger difference, is then carried out
Ammonia optimization, off-line maintenance maintenance and the transformation of necessary flow field.
In the present embodiment, when catalyst laboratory performance test results show compression strength, the tear strength, master of catalyst
When wanting chemical component to compare last testing result significant difference occur, reason must be analyzed in time, and combined catalyst technique is special
Property testing result variation tendency, set catalyst life correction factor.
In the present embodiment, under the conditions of determining that denitrating catalyst is in accidental conditions, fitting unit contribute at full capacity,
The ammonia slip concentration variation tendency under denitration efficiency is set, under normal circumstances using ammonia slip concentration 3ppm as critical value, according to quasi-
Curve and catalyst life correction factor are closed to assess and predict catalyst life expiration time；As ammonia slip concentration is monitored on-line
Data inaccuracy then can accordingly be converted using ammonia consumption, exhaust gas volumn and inlet and outlet NOx concentration monitoring data:
Wherein, CslipNH3For ammonia slip concentration, mg/m3；GNH3For ammonia consumption, kg/h；Q is exhaust gas volumn, m3/h；CNOx,inFor
Denitrification apparatus inlet NOx concentration, mg/m3；CNOx,outFor denitration outlet NOx concentration, mg/m3；MNH3For NH3Mole matter
Amount, g/mol；MNO2For NO2Molal weight, g/mol；When necessary can according to denitrification apparatus assessment result to ammonia slip concentration into
Row amendment.
Following case is realized by the method for the SCR denitration life appraisal and prediction:
Certain electricity power enterprise 1000MW coal unit configures SCR denitration device, since filling catalyst at the beginning of denitrification apparatus, every year
Catalyst is sampled using chance is shut down, and carries out performance obtained in laboratory detection, during sampling in site inspection denitrification apparatus
Catalyst blockage, abrasion condition, so that it is determined that catalyst performance correction factor.
According to performance test results or denitrification apparatus actual operating state, irregularly carries out denitrification apparatus performance and assess work
Make, on-the-spot test unit at full capacity under operating condition denitrification apparatus denitration efficiency and the escaping of ammonia, carry out when necessary online spray ammonia optimization,
The denitrification apparatus performances Optimization Work such as off-line maintenance maintenance and flow field transformation.
Under the conditions of determining that denitrating catalyst is in accidental conditions, fitting unit contributes at full capacity, sets denitration effect
Ammonia slip concentration variation tendency under rate is assessed according to matched curve using ammonia slip concentration 3ppm as critical value and prediction is urged
Agent service life expiration time provides support for management works such as the installation of subsequent catalyst, replacement, regeneration, ensures denitrification apparatus
Stablize, reliable, economical operation.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (7)
1. a kind of method of SCR denitration life appraisal and prediction, it is characterised in that: described method includes following steps:
Catalyst laboratory performance detection, denitrification apparatus performance assessment and optimization and denitrification apparatus on-line operation Parameter analysis and quasi-
It closes；The performance parameter that catalyst itself is grasped by regularly catalyst laboratory performance detection, refers to according to performance test results
Irregular denitrification apparatus performance assessment is led, carries out denitrification apparatus performance Optimization Work when necessary, so that it is guaranteed that catalyst is run
Situation is normal, on this basis by analysis denitrification apparatus on-line operation parameter, and is fitted unit and contributes at full capacity, sets denitration
Ammonia slip concentration variation tendency under efficiency, thus accurate evaluation and prediction catalyst life expiration time.
2. the method for SCR denitration life appraisal and prediction according to claim 1, it is characterised in that: catalyst
The content of performance obtained in laboratory detection includes the physicochemical properties such as compression strength, tear strength, the main chemical compositions of catalyst, and
Denitration efficiency, the escaping of ammonia, SO2/SO3The operational characteristiies parameter such as conversion ratio, and sample phase is shut down in catalyst, site inspection is de-
Catalyst blockage, abrasion condition in nitre device, so that it is determined that catalyst performance correction factor.
3. the method for SCR denitration life appraisal and prediction according to claim 1, it is characterised in that: work as catalysis
Agent performance obtained in laboratory testing result or denitrification apparatus actual operating state are deposited when abnormal, are carried out denitrification apparatus performance and are assessed work
Make, assessment content include test unit at full capacity under operating condition denitrification apparatus denitration efficiency and the escaping of ammonia.
4. the method for SCR denitration life appraisal and prediction according to claim 1, it is characterised in that: work as catalysis
Still there are larger with denitrification apparatus performance assessment result multiplied by after catalyst performance correction factor for agent performance obtained in laboratory testing result
When difference, then carry out denitrification apparatus performance Optimization Work, optimizing content includes that online spray ammonia optimizes, off-line maintenance is safeguarded and must
The flow field transformation wanted.
5. the method for SCR denitration life appraisal and prediction according to claim 2, it is characterised in that: work as catalysis
Agent performance obtained in laboratory testing result shows that compression strength, tear strength, the main chemical compositions of catalyst compare last detection
When as a result there is significant difference, reason must be analyzed in time, and combined catalyst operational characteristic testing result variation tendency, setting are urged
Agent life adjustment factor.
6. the method for SCR denitration life appraisal and prediction according to claim 1, it is characterised in that: in determination
Denitrating catalyst is under the conditions of accidental conditions, and fitting unit is contributed at full capacity, the escaping of ammonia that sets under denitration efficiency is dense
Variation tendency is spent, under normal circumstances using ammonia slip concentration 3ppm as critical value, according to matched curve and catalyst life amendment system
Number is to assess and predict catalyst life expiration time.
7. the method for SCR denitration life appraisal and prediction according to claim 6, it is characterised in that: as ammonia is escaped
Concentration online monitoring data of escaping inaccuracy can then be carried out using ammonia consumption, exhaust gas volumn and inlet and outlet NOx concentration monitoring data
Corresponding conversion:
Wherein, CslipNH3For ammonia slip concentration, mg/m3；GNH3For ammonia consumption, kg/h；Q is exhaust gas volumn, m3/h；CNOx,inFor denitration
Device portal NOx concentration, mg/m3；CNOx,outFor denitration outlet NOx concentration, mg/m3；MNH3For NH3Molal weight, g/
mol；MNO2For NO2Molal weight, g/mol；Ammonia slip concentration is modified according to denitrification apparatus assessment result when necessary.
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Cited By (6)
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| CN111044667A (en) * | 2019-12-10 | 2020-04-21 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Method for evaluating activity of denitration system catalyst and method for correcting denitration efficiency |
| CN111508571A (en) * | 2020-04-24 | 2020-08-07 | 国电环境保护研究院有限公司 | Mechanical life evaluation and prediction method for honeycomb denitration catalyst |
| CN111624876A (en) * | 2020-04-23 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN113268871A (en) * | 2021-05-21 | 2021-08-17 | 燕山大学 | Cement chimney NOX prediction method based on multivariable time sequence depth network model |
| CN113593656A (en) * | 2021-07-19 | 2021-11-02 | 苏州西热节能环保技术有限公司 | SCR catalyst performance evaluation and service life estimation method |
| CN114674971A (en) * | 2022-03-21 | 2022-06-28 | 华电电力科学研究院有限公司 | Method for evaluating comprehensive performance of SCR denitration catalyst |
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| CN111044667A (en) * | 2019-12-10 | 2020-04-21 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Method for evaluating activity of denitration system catalyst and method for correcting denitration efficiency |
| CN111044667B (en) * | 2019-12-10 | 2022-06-21 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Method for evaluating activity of denitration system catalyst and method for correcting denitration efficiency |
| CN111624876A (en) * | 2020-04-23 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN111624876B (en) * | 2020-04-23 | 2021-06-15 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN111508571A (en) * | 2020-04-24 | 2020-08-07 | 国电环境保护研究院有限公司 | Mechanical life evaluation and prediction method for honeycomb denitration catalyst |
| CN111508571B (en) * | 2020-04-24 | 2023-03-03 | 国电环境保护研究院有限公司 | Mechanical life evaluation and prediction method for honeycomb denitration catalyst |
| CN113268871A (en) * | 2021-05-21 | 2021-08-17 | 燕山大学 | Cement chimney NOX prediction method based on multivariable time sequence depth network model |
| CN113268871B (en) * | 2021-05-21 | 2023-04-07 | 燕山大学 | Cement chimney NOX prediction method based on multivariable time sequence depth network model |
| CN113593656A (en) * | 2021-07-19 | 2021-11-02 | 苏州西热节能环保技术有限公司 | SCR catalyst performance evaluation and service life estimation method |
| CN113593656B (en) * | 2021-07-19 | 2024-04-23 | 苏州西热节能环保技术有限公司 | SCR catalyst performance evaluation and service life prediction method |
| CN114674971A (en) * | 2022-03-21 | 2022-06-28 | 华电电力科学研究院有限公司 | Method for evaluating comprehensive performance of SCR denitration catalyst |
| CN114674971B (en) * | 2022-03-21 | 2023-06-13 | 华电电力科学研究院有限公司 | Comprehensive performance evaluation method of SCR denitration catalyst |
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