CN105032182B - The denitration spray automatic method of ammonia based on artificial intelligence - Google Patents
The denitration spray automatic method of ammonia based on artificial intelligence Download PDFInfo
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- CN105032182B CN105032182B CN201510524941.XA CN201510524941A CN105032182B CN 105032182 B CN105032182 B CN 105032182B CN 201510524941 A CN201510524941 A CN 201510524941A CN 105032182 B CN105032182 B CN 105032182B
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- denitration
- ammonia
- requirement
- manually set
- ammonia requirement
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000013473 artificial intelligence Methods 0.000 title claims abstract description 10
- 239000007921 spray Substances 0.000 title claims description 11
- 238000010977 unit operation Methods 0.000 claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The present invention relates to the technical field of thermal power plant denitration, the automatic method of ammonia is sprayed in especially a kind of denitration based on artificial intelligence, and implementation step is：Using chance is shut down, increase a set of denitration ammonia requirement calculating logic；Using historical data during unit operation, necessary limit value is carried out to significant data, it is for 1.1 times of normal operational parameters to limit high lower bound；After unit operation, in each operating mode section of unit operation, operations staff is allowed to manually set denitration ammonia requirement；By unit historical data, with the ammonia requirement and step calculated automatically（Three）Middle operation manually sets ammonia requirement value and is compared, and notices that the trend that calculates automatically and operations staff set deviation by hand；According to drift correction calculated curve or function curve, it is fitted operation and manually set curve, increase if necessary runs manual bias capability；Denitration automatically engages operation.The present invention solves traditional denitration, NOxThe shortcomings that banding comes, ammonia requirement is significantly reduced, saved the cost of denitration operation.
Description
Technical field
The present invention relates to the technical field of thermal power plant denitration, especially a kind of automatic denitration spray based on artificial intelligence
The method of ammonia.
Background technology
During " 12 ", the binding air in China, which administers index, 2：Sulfur dioxide and oxynitrides respectively under
Drop 8% and 10%, thermoelectricity are the main powers of emission reduction as one of four big highly energy-consuming trades.According to Chinese Ministry of Environmental Protection《Thermal power plant's air
Emission standard (GB13223-2011)》, all fired power generating units all should reach limit value requirement before in July, 2014.With policy
Fully under way, existing coal-burning power plant's denitration transformation paces are accelerated.
Current most thermal power plants, denitration use SCR technologies, use NH3As in reducing agent, with flue gas
NOXCarry out reduction reaction.The algorithm of its ammonia requirement uses following two patterns substantially：
First, efficiency mode：Which is a kind of base control mode based on denitration efficiency and catalyst denitration ability, its
Main algorithm is according to NO in flue gasXConcentration and exhaust gas volumn, and fixed ammonia nitrogen mol ratio designs multiplied by with denitration efficiency
Value, calculating needs ammonia amount, calculates requirement as setting using this, carries out PI regulations.
The pattern has a disadvantage that：1st, when unit load is changed, burning air distribution is adjusted and is run to mill, cigarette can be caused
NO in gasXConcentration significantly change, ammonia requirement setting value fluctuation can be caused, beyond scope is automatically adjusted, send out system fading margin
Dissipate, can not put into automatically.2nd, in stable conditions, spray ammonia excess is likely to result in, increases denitration operating cost.Spray ammonia for a long time
It is excessive also to block air preheater, influence unit safety operation.
2nd, NO is exportedXPattern：Which is with the outlet NO of the setting of operating personnelXConcentration is setting value, is gone out using denitration
Mouth NOXConcentration is feedback, carries out PI regulations.
The pattern has a disadvantage that：Due to being needed after spray ammonia by pyrolytic reaction, reactor catalysis, the analysis of CEMS systematic samplings
Etc. all too many levels, regulation delay is larger, it is possible to causes NOXDischarge beyond standards, because environmental administration's performance assessment criteria is flue gas row
Limit value is put, if NOXThe exceeded examination that can cause environmentally friendly electricity price, to causing economic loss in factory.
The content of the invention
The technical problem to be solved in the present invention is：Overcome deficiency in the prior art, there is provided a kind of based on artificial intelligence
The automatic method of ammonia is sprayed in denitration.
The shortcomings that based on above control model, it is proposed that the denitration algorithms of automatic optimization based on artificial intelligence.This method
With entrance NOXAnd based on the ammonia requirement of exhaust gas volumn calculating, regulation computing dead band is increased, ammonia requirement is subjected to step setting, mould
It is manually operated to intend operations staff, aids in operations staff to bias manually if necessary.With the ammonia requirement that finally calculates as finally setting
Definite value, carry out PI regulation computings.
Such a method efficiently solves denitration efficiency pattern and NOXThe shortcomings that pattern, ensureing to export NOXThat discharges is same
When, effectively reducing needs ammonia amount, has saved denitration operating cost.
The technical solution adopted for the present invention to solve the technical problems is：A kind of denitration spray ammonia based on artificial intelligence is automatic
Method, implementation step is：
The denitration spray automatic method of ammonia based on artificial intelligence, implementation step are：
(1), using chance is shut down, a set of denitration ammonia requirement calculating logic is increased；
(2), using historical data during unit operation, necessary limit value is carried out to significant data, limit high lower bound be for
1.1 times of normal operational parameters；
(3), after unit operation, in each operating mode section of unit operation, operations staff is allowed to manually set denitration ammonia requirement, the ammonia
Requirement ensures：(1) NO, is exportedXIt is not exceeded；(2), ammonia spraying amount is not excessive；
(4), by unit historical data, manually setting ammonia with operation in step (3) with the ammonia requirement calculated automatically needs
Value is compared, and notices that the trend that calculates automatically and operations staff set deviation by hand；
(5), according to drift correction calculated curve or function curve, it is fitted operation and manually set curve, increase if necessary
Add the manual bias capability of operation；
(6), denitration automatically engages operation；
(7), manually set ammonia requirement value (the 3rd step) with operation with the ammonia requirement calculated automatically to be compared, set manually
Determine ammonia requirement：When automatic denitration ammonia can not be put into, the ammonia requirement of power-plant flue gas denitration needs operating personnel according to machine at that time
Group operating condition, and NOXConcentration of emission, manually set with reference to practical operating experiences, it is that operating personnel pass through to manually set
What operator station completed.
The beneficial effects of the invention are as follows：Present invention efficiently solves traditional denitration pattern, NOxLacked caused by pattern
Point, ensureing NOxWhile discharge, ammonia requirement is significantly reduced, has saved the cost of denitration operation.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the logic chart of the present invention.
Embodiment
Presently in connection with accompanying drawing and preferred embodiment, the present invention is further illustrated.These accompanying drawings are simplified signal
Figure, only illustrate the basic structure of the present invention in a schematic way, therefore it only shows the composition relevant with the present invention.
The denitration spray automatic method of ammonia based on artificial intelligence, implementation step are：
(1), using chance is shut down, a set of denitration ammonia requirement calculating logic is increased, as reserved during Fig. 1 Logical Configurations
Necessary curve, high lower bound, slope scheduling algorithm module；
(2), using historical data during unit operation, necessary limit value is carried out to significant data, limit high lower bound be for
1.1 times of normal operational parameters, such as operational factor are out-of-limit, then show the abnormal parameters；Because machine unit characteristic is different, every machine
Group is had nothing in common with each other, such as #3 unit inlets NOX(nitrogen oxides) limits are 250mg/M3--450mg/M3, and urea operand limits
Value scope is 0.22M3/h--0.33M3/h；
(3), after unit operation, in each operating mode section of unit operation, operations staff is allowed to manually set denitration ammonia requirement, the ammonia
Requirement should ensure that：(1) NO, is exportedXIt is not exceeded；(2), ammonia spraying amount is not excessive, (refers to the actual input amount of urea and unit denitration urea
Actual demand amount matches, and actual input amount is not more than actual demand amount)；
(4), by unit historical data, ammonia requirement value the (the 3rd is manually set with the ammonia requirement and operation calculated automatically
Step) it is compared, notice that the trend that calculates automatically and operations staff set deviation by hand；
(5), according to drift correction calculated curve or function curve (below figure FG017, FG029).Make its fitting operation hand
Dynamic setting curve, if necessary increase run manual bias capability；
(6), denitration automatically engages operation；
(7), manually set ammonia requirement value (the 3rd step) with operation with the ammonia requirement calculated automatically to be compared, set manually
Determine ammonia requirement：When automatic denitration ammonia can not be put into, the ammonia requirement of power-plant flue gas denitration needs operating personnel according to machine at that time
Group operating condition, and NOXConcentration of emission, manually set with reference to practical operating experiences, it is that operating personnel pass through to manually set
What operator station completed.
Ammonia requirement value (the 3rd step) is manually set with the ammonia requirement calculated automatically with operation to be compared, manually setting ammonia needs
Amount：When automatic denitration ammonia can not be put into, the ammonia requirement of power-plant flue gas denitration needs operating personnel according to unit operation at that time
Operating mode, and NOXConcentration of emission, manually set with reference to practical operating experiences, it is that operating personnel pass through operator to manually set
Stand what is completed.
As shown in figure 1, this is the function curve of the #3 units denitration spray automatic actual motion of ammonia：
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and be carried out, and it is not intended to limit the scope of the present invention, all according to the present invention
The equivalent change or modification that Spirit Essence is made, it should all cover within the scope of the present invention.
Claims (1)
1. a kind of denitration spray automatic method of ammonia based on artificial intelligence, implementation step are：
(1), using chance is shut down, a set of denitration ammonia requirement calculating logic is increased；
(2), using historical data during unit operation, necessary limit value is carried out to significant data, it is to be normal to limit high lower bound
1.1 times of operational factor；
(3), after unit operation, in each operating mode section of unit operation, operations staff is allowed to manually set denitration ammonia requirement, the ammonia requirement
Ensure：(1) NO, is exportedXIt is not exceeded；(2), ammonia spraying amount is not excessive；
(4), by unit historical data, ammonia requirement value is manually set with the ammonia requirement calculated automatically and operation in step (3)
It is compared, notices that the trend that calculates automatically and operations staff set deviation by hand；
(5), according to drift correction calculated curve or function curve, it is fitted operation and manually set curve, if necessary increase fortune
The manual bias capability of row；
(6), denitration automatically engages operation；
(7), manually set ammonia requirement value (the 3rd step) with operation with the ammonia requirement calculated automatically to be compared, manually set ammonia
Requirement：When automatic denitration ammonia can not be put into, the ammonia requirement of power-plant flue gas denitration needs operating personnel to be transported according to unit at that time
Row operating mode, and NOXConcentration of emission, manually set with reference to practical operating experiences, it is that operating personnel pass through operation to manually set
Member completes at station.
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| CN201510524941.XA CN105032182B (en) | 2015-08-25 | 2015-08-25 | The denitration spray automatic method of ammonia based on artificial intelligence |
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| CN105032182B true CN105032182B (en) | 2018-01-30 |
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| CN106512723B (en) * | 2016-12-26 | 2023-09-19 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Denitration automatic regulating loop device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674103A (en) * | 2013-10-18 | 2014-03-26 | 广东电网公司电力科学研究院 | Performance testing method for SCR (Selective Catalytic Reduction) flue gas denitration system |
| CN104504238A (en) * | 2014-11-21 | 2015-04-08 | 国家电网公司 | Method for predicting nitrogen oxide emission concentration of coal-fired unit based on neural network |
| CN104607042A (en) * | 2014-12-26 | 2015-05-13 | 东南大学 | Selective catalytic reduction (SCR) denitration system and method based on constraint predictive control |
| CN104826493A (en) * | 2015-04-23 | 2015-08-12 | 华北电力大学（保定） | Control method for selective catalytic reduction flue gas denitrification system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5846381B2 (en) * | 2012-05-18 | 2016-01-20 | 三菱自動車工業株式会社 | Exhaust gas purification device for internal combustion engine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674103A (en) * | 2013-10-18 | 2014-03-26 | 广东电网公司电力科学研究院 | Performance testing method for SCR (Selective Catalytic Reduction) flue gas denitration system |
| CN104504238A (en) * | 2014-11-21 | 2015-04-08 | 国家电网公司 | Method for predicting nitrogen oxide emission concentration of coal-fired unit based on neural network |
| CN104607042A (en) * | 2014-12-26 | 2015-05-13 | 东南大学 | Selective catalytic reduction (SCR) denitration system and method based on constraint predictive control |
| CN104826493A (en) * | 2015-04-23 | 2015-08-12 | 华北电力大学（保定） | Control method for selective catalytic reduction flue gas denitrification system |
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Address after: 063028 Liyuan Village North, Kaiping District, Tangshan City, Hebei Province Patentee after: Datang International Power Generation Co.,Ltd. Address before: 063028 Liyuan Village North, Kaiping District, Tangshan City, Hebei Province Patentee before: DOUHE POWER PLANT OF DATANG INTERNATIONAL POWER GENERATION CO.,LTD. |
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