CN116392938B - Waste gas denitration reaction process - Google Patents
Waste gas denitration reaction process Download PDFInfo
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- CN116392938B CN116392938B CN202310668374.XA CN202310668374A CN116392938B CN 116392938 B CN116392938 B CN 116392938B CN 202310668374 A CN202310668374 A CN 202310668374A CN 116392938 B CN116392938 B CN 116392938B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 155
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 235
- 238000004519 manufacturing process Methods 0.000 claims abstract description 159
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 239000002253 acid Substances 0.000 claims abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000001179 sorption measurement Methods 0.000 claims abstract description 6
- 238000010894 electron beam technology Methods 0.000 claims abstract description 5
- 244000005700 microbiome Species 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 42
- 238000012163 sequencing technique Methods 0.000 claims description 37
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- 238000012549 training Methods 0.000 claims description 13
- 239000000779 smoke Substances 0.000 claims description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000012795 verification Methods 0.000 claims description 7
- 239000000284 extract Substances 0.000 claims description 6
- 238000010801 machine learning Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 6
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- 239000003814 drug Substances 0.000 claims description 3
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
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- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/30—Controlling by gas-analysis apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/402—Dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The application relates to an exhaust gas denitration reaction process which comprises an exhaust gas conveying module, an exhaust gas denitration module, a gas discharging module, a PLC (programmable logic controller) and a denitration planning module; the waste gas denitration module comprises one or more of an SCR denitration device group, an SNCR denitration device group, an adsorption denitration device group, an acid absorption denitration device group, an alkali absorption denitration device group, an electron beam denitration device group and a microorganism denitration device group; the denitration plan module acquires a production plan in real time, determines an exhaust denitration scheme based on production plan matching, and controls the exhaust conveying module, the exhaust denitration module and the gas discharge module to convey, denitrate and discharge the exhaust according to the exhaust denitration scheme through the PLC. The application can effectively improve the denitration efficiency of the waste gas and reduce the denitration cost.
Description
Technical Field
The application relates to the field of waste gas denitration, in particular to a waste gas denitration reaction process.
Background
Sulfur dioxide, nitrogen oxides NO X Are all sources of atmospheric pollution. NO (NO) X Under the action of sunlight, photochemical reaction is caused to form photochemical smog, so that serious atmospheric pollution is caused. Denitration of flue gas means that generated NO X Reduction to N 2 Thereby removing NO in the flue gas X The treatment process can be divided into wet denitration and dry denitration.
Due to NO in the flue gas discharged from the combustion system X More than 90% of NOX is NO, which is poorly soluble in water, thus NO x Cannot be treated by simple washing. The flue gas denitration principle is that NO is oxidized into NO by using an oxidant 2 Generated NO 2 And then the water or alkaline solution is used for absorption, thereby realizing denitration. O (O) 3 O for oxidation absorption method 3 Oxidation of NO to NO 2 Then absorbed with water. The product HNO of the method 3 Concentrating the liquid, and O 3 High voltage is needed for preparation, and initial investment and operation cost are high. ClO (ClO) 2 ClO by oxidation-reduction method 2 Oxidation of NO to NO 2 Then using Na 2 SO 3 Aqueous solution of NO 2 Reduction to N 2 . The method can be combined with wet desulfurization technology adopting NaOH as desulfurizing agent, and the desulfurized reaction product Na 2 SO 3 And can also be used as NO 2 Is not limited. ClO (ClO) 2 The denitration rate of the method can be reached95%, and can be simultaneously desulfurized, but ClO 2 And NaOH is high, and the running cost increases.
The existing waste gas denitration equipment mainly comprises an acid absorption method, an alkali absorption method, a selective catalytic reduction method, a non-selective catalytic reduction method, an adsorption method, an ion body activation method and the like based on denitration technology classification. In order to improve the denitration treatment capacity of waste gas, the existing large-scale production enterprises often set up a plurality of denitration process equipment to carry out combined waste gas denitration. Since production plans of each time period are different from each other due to production enterprise operation factors, and the waste gas denitration demands are also different from each other, how to combine the production plans to make and carry out the waste gas denitration plans is a problem to be solved.
Disclosure of Invention
The application provides an exhaust gas denitration reaction process, which aims to solve the problems of low exhaust gas denitration efficiency and energy waste caused by the fact that the existing exhaust gas denitration process cannot be adapted to an enterprise production plan.
In a first aspect, the application provides an exhaust gas denitration reaction process, which adopts the following technical scheme:
an exhaust gas denitration reaction process comprises an exhaust gas conveying module, an exhaust gas denitration module, a gas discharge module, a PLC (programmable logic controller) and a denitration planning module; the waste gas conveying module, the waste gas denitration module and the gas discharge module are all connected with a PLC, and the PLC is connected with the denitration planning module; the waste gas denitration module comprises one or more of an SCR denitration device group, an SNCR denitration device group, an adsorption denitration device group, an acid absorption denitration device group, an alkali absorption denitration device group, an electron beam denitration device group and a microorganism denitration device group; the waste gas conveying module is connected with the waste gas denitration module and is used for conveying waste gas to the waste gas denitration module; the gas discharge module is connected with the waste gas denitration module and is used for discharging the gas subjected to denitration treatment by the waste gas denitration module; the denitration plan module acquires a production plan in real time, determines an exhaust denitration scheme based on production plan matching, and controls the exhaust conveying module, the exhaust denitration module and the gas discharge module to convey, denitrate and discharge the exhaust according to the exhaust denitration scheme through the PLC.
Preferably, the denitration plan module acquires a production plan in real time, determines an exhaust gas denitration scheme based on production plan matching, and controls the exhaust gas conveying module, the exhaust gas denitration module and the gas discharge module to convey and denitration the exhaust gas according to the exhaust gas denitration scheme through the PLC, wherein the exhaust gas conveying and denitration step specifically comprises the following steps:
the denitration planning module acquires a production plan of the next production cycle of each factory in real time, and determines an exhaust gas denitration requirement in the next production cycle based on production plan measurement, wherein the exhaust gas denitration requirement comprises exhaust gas flow information, exhaust gas component information, exhaust gas temperature information and exhaust gas smoke content information of each standard unit cycle in the production cycle;
determining an exhaust gas denitration scheme based on exhaust gas denitration requirement matching, wherein the exhaust gas denitration scheme comprises at least one group of denitration equipment set setting parameters, a denitration medicament formula and process flow information;
the denitration planning module issues denitration equipment set setting parameters to the PLC based on an exhaust denitration scheme, and the PLC revises the parameter settings of the exhaust conveying module, the exhaust denitration module and the gas emission module in a production plan starting stage;
the denitration planning module generates a scheduling instruction based on an exhaust gas denitration scheme, and schedules production personnel to configure and transport denitration agents;
and the PLC controls the waste gas conveying module, the waste gas denitration module and the gas discharge module to finish waste gas conveying, denitration and purification and discharge work based on the process flow information.
Preferably, the denitration plan module acquires a production plan of a next production cycle in real time, and determines an exhaust gas denitration requirement in the next production cycle based on production plan measurement and calculation specifically includes the following steps:
the denitration planning module acquires a production plan of the next production period in real time, wherein the production plan comprises a production plan of each standard unit period in the next production period and process flow information;
simulating and generating a calibration waste gas generation plan through a preset waste gas simulation model based on the production plan, wherein the calibration waste gas generation plan comprises waste gas flow information, waste gas component information, waste gas temperature information and waste gas smoke content information in each standard unit period in the next production period; the waste gas simulation model is obtained by training a machine learning model through historical production data information;
simulating different characteristic revisions of each production plan in each proceeding stage based on a calibration waste gas production plan through a preset demand adjustment model to generate waste gas denitration demands; the demand adjustment model is a machine learning model which is obtained by training historical production data information.
Preferably, the determining the exhaust gas denitration scheme based on the exhaust gas denitration requirement matching specifically includes the following steps:
determining at least one alternative exhaust gas denitration scheme meeting the exhaust gas denitration requirement through matching of a preset scheme matching model based on the exhaust gas denitration requirement;
calculating a scheme score for the candidate exhaust gas denitration scheme determined by matching based on a preset scheme score calculation formula;
and sequencing the alternative exhaust gas denitration schemes based on the scheme scores, and selecting the alternative exhaust gas denitration scheme with the highest scheme score as the exhaust gas denitration scheme which is determined in a matching way.
Preferably, the calculating the scheme score of the candidate exhaust gas denitration scheme determined by matching based on the preset scheme score calculating formula specifically comprises the following steps:
sequencing each alternative waste gas denitration scheme based on the denitration rate, the running cost, the environmental protection coefficient, the operation difficulty and the denitration capacity loading rate respectively to generate a denitration rate sequence, a running cost sequence, an environmental protection coefficient sequence, an operation difficulty sequence and a denitration capacity loading rate sequence, and acquiring a denitration rate sequencing score, a running cost sequencing score, an environmental protection coefficient sequencing score, an operation difficulty sequencing score and a denitration capacity loading rate sequencing score of each waste gas denitration scheme through a preset sequencing ranking comparison table;
acquiring waste gas treatment opinions from a user, selecting any one of the sorting sequences as the highest priority sequence based on the waste gas treatment opinions, using other sorting sequences as the secondary priority sequence, and selecting the production cost sequence as the highest priority sequence by default if the waste gas treatment opinion is not fed back by the user;
and calculating the scheme scores of the alternative exhaust gas denitration schemes according to the sequencing scores of the alternative exhaust gas denitration schemes by a preset scheme score calculation formula.
Preferably, the preset scheme score calculation formula specifically includes:
；
wherein the method comprises the steps ofScoring the scheme of the ith alternative flue gas denitration scheme,/->Scoring the highest priority sequence of the ith alternative exhaust gas denitration scheme, +.>And (3) the sum of the scores of the sub-priority sequences of the ith alternative exhaust gas denitration scheme is obtained, T is a sub-priority adjustment coefficient, the default value is 1, and the sum is set by a manager.
Preferably, the method for generating the denitration capacity load rate sequence by sequencing the alternative exhaust gas denitration schemes based on the denitration capacity load rate specifically includes: calculating the absolute value of the difference between the denitration capacity load rate and the preset calibration load rate of each alternative waste gas denitration scheme through a preset load difference calculation formula, and sequencing from small to large based on the absolute value of the difference to generate a denitration capacity load rate sequence.
Preferably, the preset load difference calculation formula specifically includes:
；
wherein the method comprises the steps ofThe absolute value of the difference between the ith alternative exhaust gas denitration scheme and the preset calibration load rate is set; b is a preset calibration load rate, n is the total standard unit period in the production period, < + >>And the load rate of the denitration capacity in the jth standard unit period is the ith alternative exhaust gas denitration scheme.
Preferably, the exhaust gas conveying module comprises a gas conveying pipeline assembly for conveying the exhaust gas generated by each production factory to the exhaust gas denitration module and an exhaust gas sampling analysis assembly for collecting the exhaust gas in the gas conveying pipeline assembly for component analysis, and the PLC controller periodically extracts the exhaust gas component information, the exhaust gas temperature information and the exhaust gas smoke content information of the exhaust gas generated in each standard unit period through the exhaust gas sampling analysis assembly, performs verification, generates warning information when parameters are abnormal and sends the warning information to a manager; and after the production plan is finished, packaging the exhaust emission data and the production data in the production plan, and transmitting the exhaust emission data and the production data to an exhaust simulation model and a demand adjustment model for sample training.
Preferably, the gas emission module comprises a gas emission pipeline assembly for discharging clean gas after denitration of the waste gas denitration module and a gas sampling analysis assembly for collecting gas in the gas emission pipeline assembly for component analysis, and the PLC controller regularly extracts gas component data after denitration in each standard unit period through the gas sampling analysis assembly for verification, and generates warning information to be sent to a manager when parameters are abnormal; and packaging gas component data in the production plan after the production plan is completed, and transmitting the waste gas denitration scheme and the production data to a scheme denitration model for sample training.
In summary, the present application includes at least one of the following beneficial technical effects:
through the arrangement of the PLC and the denitration plan module, high-efficiency denitration is realized for enterprises with large production scale, more factories and large waste gas denitration demands, an accurate matching and generation waste gas denitration scheme is realized based on the production plans of each factory of the enterprises, customized denitration service is provided for each production plan, waste gas denitration efficiency is ensured, energy consumption is effectively reduced, and the effects of effectively improving waste gas denitration efficiency and reducing denitration cost are achieved;
the denitration planning module calculates the waste gas production condition through the production planning simulation production process, further determines the waste gas denitration requirement, and then generates a waste gas denitration scheme according to the accurate matching of the waste gas denitration requirement, so that the phenomena of insufficient denitration capacity, excessive denitration capacity and unmatched denitration technology are avoided, the superiority of multi-denitration technology combined denitration is fully exerted by mutually combining denitration equipment groups of multiple technologies, and the denitration efficiency of enterprises is improved and the denitration cost is reduced as much as possible on the basis of meeting environmental protection regulations;
simulating production according to a production plan through an exhaust gas simulation model, simulating to generate a calibrated exhaust gas production plan, and determining exhaust gas flow information, exhaust gas component information, exhaust gas temperature information and exhaust gas smoke content information in each standard unit period when the production plan is performed in an ideal state; because the early stage of production plan starting, because personnel equipment running-in and various initial common problems often easily lead to the initial production plan not to be accurately realized, the waste gas production plan is calibrated based on different characteristic revisions of each production plan carrying out stage through a demand adjustment model, so that the waste gas denitration demand meeting the actual production condition is obtained, the accuracy of the waste gas denitration demand is improved, the waste gas denitration scheme is accurately matched for the production plan of each factory, the denitration equipment group resources are accurately distributed, the superiority of multi-denitration process combined denitration is fully exerted, and the effect of effectively improving the waste gas denitration efficiency and reducing the denitration cost is achieved.
Drawings
FIG. 1 is a block diagram of an apparatus system for an exhaust gas denitration reaction process in an embodiment of the present application;
FIG. 2 is a flow chart of a method for a denitration planning module to generate an exhaust denitration scheme in an embodiment of the application;
FIG. 3 is a flow chart of a method of generating an exhaust gas denitration requirement in an embodiment of the present application;
FIG. 4 is a flow chart of a method for matching determination of an exhaust gas denitration scheme in an embodiment of the application;
fig. 5 is a flow chart of a method of calculating a scheme score for an alternative flue gas denitration scheme in an embodiment of the present application.
Reference numerals illustrate: 1. an exhaust gas delivery module; 11. a gas delivery line assembly; 12. an exhaust sampling analysis component; 2. an exhaust gas denitration module; 3. a gas discharge module; 31. a gas discharge line assembly; 32. a gas sampling analysis component; 4. a PLC controller; 5. and a denitration planning module.
Detailed Description
The application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses an exhaust gas denitration reaction process. Referring to fig. 1, an exhaust gas denitration reaction process includes an exhaust gas delivery module 1, an exhaust gas denitration module 2, a gas discharge module 3, a PLC controller 4, and a denitration planning module 5. The waste gas conveying module 1, the waste gas denitration module 2 and the gas discharge module 3 are all connected with the PLC 4, and the PLC 4 is connected with the denitration planning module 5. The exhaust gas denitration module 2 comprises one or more of an SCR denitration device group, an SNCR denitration device group, an adsorption denitration device group, an acid absorption denitration device group, an alkali absorption denitration device group, an electron beam denitration device group and a microorganism denitration device group. The SCR denitration device group, the SNCR denitration device group, the adsorption denitration device group, the acid absorption denitration device group, the alkali absorption denitration device group, the electron beam denitration device group, and the microorganism denitration device group are all existing denitration device groups corresponding to various denitration processes, and specific structures are not described in detail.
Referring to fig. 1, an exhaust gas delivery module 1 is connected to an exhaust gas denitration module 2 for delivering exhaust gas to the exhaust gas denitration module 2. The gas emission module 3 is connected with the waste gas denitration module 2 and is used for discharging the gas after denitration treatment of the waste gas denitration module 2. The denitration plan module 5 acquires a production plan in real time, determines an exhaust gas denitration scheme based on production plan matching, and controls the exhaust gas conveying module 1, the exhaust gas denitration module 2 and the gas discharge module 3 to convey and denitration exhaust gas according to the exhaust gas denitration scheme through the PLC 4. Through the setting of PLC controller 4 and denitration plan module 5, realize high-efficient denitration for the enterprise that production scale is big, the factory is many, waste gas denitration demand is big, realize the accurate matching and produce waste gas denitration scheme based on the production plan of each factory of enterprise, provide customized denitration service for every production plan, effectively reduce energy consumption when guaranteeing waste gas denitration efficiency, reach the effect that effectively improves waste gas denitration efficiency and reduce denitration cost.
Referring to fig. 2, the denitration plan module 5 acquires a production plan in real time, determines an exhaust denitration scheme based on production plan matching, and controls the exhaust conveying module 1, the exhaust denitration module 2 and the gas discharge module 3 to convey, denitrate and discharge exhaust according to the exhaust denitration scheme through the PLC controller 4, specifically comprising the steps of:
s1, obtaining a production plan, measuring and calculating and determining the waste gas denitration requirement: the denitration planning module 5 acquires a production plan of the next production cycle of each factory in real time, and determines an exhaust gas denitration requirement in the next production cycle based on the production plan measurement, wherein the exhaust gas denitration requirement comprises exhaust gas flow information, exhaust gas component information, exhaust gas temperature information and exhaust gas smoke content information of each standard unit cycle in the production cycle;
s2, matching and determining an exhaust gas denitration scheme: determining an exhaust gas denitration scheme based on exhaust gas denitration requirement matching, wherein the exhaust gas denitration scheme comprises at least one group of denitration equipment set parameters, a denitration medicament formula and process flow information;
s3, issuing denitration device group setting parameters to the PLC 4: the denitration planning module 5 issues denitration equipment set setting parameters to the PLC 4 based on an exhaust denitration scheme, and the PLC 4 revises the parameter settings of the exhaust conveying module 1, the exhaust denitration module 2 and the gas discharge module 3 in a production plan starting stage;
s4, generating a scheduling instruction based on an exhaust gas denitration scheme: the denitration planning module 5 generates a scheduling instruction based on an exhaust gas denitration scheme, and schedules production personnel to configure and transport denitration agents;
s5, completing waste gas conveying, denitration and purification and emission work: the PLC 4 controls the waste gas conveying module 1, the waste gas denitration module 2 and the gas discharge module 3 to finish waste gas conveying, denitration and discharge work based on the process flow information. The denitration planning module 5 calculates the waste gas production condition through the production planning simulation production process, further determines the waste gas denitration requirement, and then generates the waste gas denitration scheme according to the accurate matching of the waste gas denitration requirement, so that the phenomena of insufficient denitration capacity, excessive denitration capacity and unmatched denitration technology are avoided, the superiority of multi-denitration technology combined denitration is fully exerted by mutually combining denitration equipment groups of multiple technologies, and the denitration efficiency of enterprises is improved and the denitration cost is reduced as much as possible on the basis of meeting environmental protection regulations.
Referring to fig. 3, the denitration planning module 5 acquires a production plan of a next production cycle in real time, and determines an exhaust gas denitration requirement in the next production cycle based on production plan measurement, which specifically includes the following steps:
a1, acquiring a production plan of the next production cycle: the denitration planning module 5 acquires a production plan of the next production cycle in real time, wherein the production plan comprises a production plan of each standard unit cycle in the next production cycle and process flow information;
a2, simulating to generate a calibration waste gas generation plan: simulating and generating a calibration waste gas generation plan based on the production plan through a preset waste gas simulation model, wherein the calibration waste gas generation plan comprises waste gas flow information, waste gas component information, waste gas temperature information and waste gas smoke content information in each standard unit period in the next production period; the waste gas simulation model is obtained by training a machine learning model through historical production data information;
a3, revising a calibration waste gas generation plan to generate waste gas denitration requirements: simulating different characteristic revisions of each production plan in each proceeding stage based on a calibration waste gas production plan through a preset demand adjustment model to generate waste gas denitration demands; the demand adjustment model is a machine learning model which is trained by historical production data information. Simulating production according to a production plan through an exhaust gas simulation model, simulating to generate a calibrated exhaust gas production plan, and determining exhaust gas flow information, exhaust gas component information, exhaust gas temperature information and exhaust gas smoke content information in each standard unit period when the production plan is performed in an ideal state; because the production plan is started earlier, the initial production plan is often not accurately realized due to personnel and equipment running-in and various initial common problems, and the production plan has different situation characteristics at each stage. Therefore, the waste gas denitration demands conforming to the actual production conditions are obtained by revising and calibrating waste gas production plans based on different characteristics of each production plan in each production stage through the demand adjustment model, the accuracy of the waste gas denitration demands is improved, the waste gas denitration scheme is helped to be accurately matched for the production plans of each factory, the denitration equipment group resources are distributed efficiently and intelligently, the superiority of multi-denitration technology combined denitration is fully exerted, and the effects of effectively improving the waste gas denitration efficiency and reducing the denitration cost are achieved.
Referring to fig. 4, the determining an exhaust gas denitration scheme based on the exhaust gas denitration requirement matching specifically includes the following steps:
b1, matching and determining at least one alternative exhaust gas denitration scheme: determining at least one alternative exhaust gas denitration scheme meeting the exhaust gas denitration requirement through matching of a preset scheme matching model based on the exhaust gas denitration requirement;
b2, calculating scheme scores: calculating a scheme score for the candidate exhaust gas denitration scheme determined by matching based on a preset scheme score calculation formula;
b3, selecting an exhaust gas denitration scheme: and sequencing the alternative exhaust gas denitration schemes based on the scheme scores, and selecting the alternative exhaust gas denitration scheme with the highest scheme score as the exhaust gas denitration scheme which is determined in a matching way.
Referring to fig. 5, the method for calculating the scheme score based on the preset scheme score calculation formula for the candidate exhaust gas denitration scheme determined by the matching specifically includes the following steps:
c1, sequencing score of each acquired exhaust gas denitration scheme: sequencing each alternative waste gas denitration scheme based on the denitration rate, the running cost, the environmental protection coefficient, the operation difficulty and the denitration capacity loading rate respectively to generate a denitration rate sequence, a running cost sequence, an environmental protection coefficient sequence, an operation difficulty sequence and a denitration capacity loading rate sequence, and acquiring a denitration rate sequencing score, a running cost sequencing score, an environmental protection coefficient sequencing score, an operation difficulty sequencing score and a denitration capacity loading rate sequencing score of each waste gas denitration scheme through a preset sequencing ranking comparison table;
the environmental protection coefficient of the alternative waste gas denitration scheme is the content of nitrogen oxides after waste gas denitration;
c2, determining the highest priority sequence and the second priority sequence: acquiring waste gas treatment opinions from a user, selecting any one of the sorting sequences as the highest priority sequence based on the waste gas treatment opinions, using other sorting sequences as the secondary priority sequence, and selecting the production cost sequence as the highest priority sequence by default if the waste gas treatment opinion is not fed back by the user;
and C3, calculating the scheme scores of each alternative exhaust gas denitration scheme: and calculating the scheme scores of the alternative exhaust gas denitration schemes according to the sequencing scores of the alternative exhaust gas denitration schemes by a preset scheme score calculation formula. Sequencing the matched alternative waste gas denitration schemes from multiple dimensions such as denitration rate, running cost, environmental protection coefficient, operation difficulty, denitration capacity and load rate and generating sequence scores, determining the highest priority sequence and the next priority according to user requirements, intelligently scoring the alternative waste gas denitration schemes while meeting the user requirements, realizing personalized score customization, meeting the user requirements, accurately matching the waste gas denitration schemes for each production plan, accurately distributing denitration equipment group resources, fully playing the superiority of multi-denitration process combined denitration, and achieving the effects of effectively improving the waste gas denitration efficiency and reducing the denitration cost.
The preset scheme score calculation formula specifically comprises the following steps:
；
wherein the method comprises the steps ofScoring the scheme of the ith alternative flue gas denitration scheme,/->Highest priority sequence for the ith alternative exhaust gas denitration schemeScore, ->And (3) the sum of the scores of the sub-priority sequences of the ith alternative exhaust gas denitration scheme is obtained, T is a sub-priority adjustment coefficient, the default value is 1, and the sum is set by a manager. The method has the advantages that the proportion of the highest priority sequence score in the whole scoring of the scheme is greatly improved through the arrangement of the scheme scoring calculation formula, personalized customized service is highlighted, the proportion of the highest priority sequence score in the whole scoring of the scheme can be further modified according to the user demand through the arrangement of the secondary priority adjustment coefficient, the customization flexibility of the scoring rule is further improved, the user demand is attached, and the effect of improving the user satisfaction is achieved.
The above-mentioned each alternative exhaust gas denitration scheme is based on denitration productivity load rate and carries out sequencing and generates denitration productivity load rate sequence specifically includes: calculating the absolute value of the difference between the denitration capacity load rate and the preset calibration load rate of each alternative waste gas denitration scheme through a preset load difference calculation formula, and sequencing from small to large based on the absolute value of the difference to generate a denitration capacity load rate sequence.
The preset load difference calculation formula specifically comprises the following steps:
│；
wherein the method comprises the steps ofThe absolute value of the difference between the ith alternative exhaust gas denitration scheme and the preset calibration load rate is set; b is a preset calibration load rate, and is set by a manager; n represents the total amount of standard unit periods in the production period, < >>And the load rate of the denitration capacity in the jth standard unit period is the ith alternative exhaust gas denitration scheme. Because of strict environmental regulations for denitration of exhaust gas, denitration equipment groups with denitration capacity load rate of 100% are not most suitable for production planning, and capacity allowance is often required to cope with eachAnd in emergency, the optimal load rate is set through the setting of the calibration load rate B, the absolute value of the difference value between the denitration capacity load rate of each alternative waste gas denitration scheme and the preset calibration load rate is calculated by taking the optimal load rate as a standard pole, and the denitration capacity load rate sequence is generated by sequencing from small to large based on the absolute value of the difference value, so that the sequencing scientificity of the denitration capacity load rate sequence can be improved, the scheme grading accuracy is improved, and the effect of precisely matching the waste gas denitration scheme is achieved.
Referring to fig. 1, the exhaust gas delivery module 1 includes a gas delivery pipe assembly 11 for delivering exhaust gas generated from each production plant area to the exhaust gas denitration module 2, and an exhaust gas sampling analysis assembly 12 for collecting the exhaust gas in the gas delivery pipe assembly 11 for component analysis. The gas delivery line assembly 11 includes conventional gas delivery components such as an exhaust gas delivery pipe, a delivery pump, and a solenoid valve, and the specific construction thereof is not repeated in the prior art. The specific construction of the exhaust sampling analysis assembly 12 is also known in the art and will not be described in detail herein. The PLC 4 regularly extracts the exhaust gas component information, the exhaust gas temperature information and the exhaust gas smoke content information of the exhaust gas generated in each standard unit period through the exhaust gas sampling analysis component 12, performs verification, generates warning information when the parameters are abnormal and sends the warning information to a manager; and after the production plan is finished, packaging the exhaust emission data and the production data in the production plan, and transmitting the exhaust emission data and the production data to an exhaust simulation model and a demand adjustment model for sample training. Detection and verification of exhaust gas generation is achieved through the exhaust gas sampling analysis component 12, and an alarm is given when the exhaust gas is abnormal. Meanwhile, after the production plan is finished, the waste gas emission data and the production data in the production plan are packed and sent to the waste gas simulation model and the demand adjustment model for sample training, so that the waste gas simulation model and the demand adjustment model can be improved continuously, and the accuracy of waste gas denitration demand generation can be improved.
Referring to fig. 1, the gas discharge module 3 includes a gas discharge line assembly 31 for discharging the clean gas after the denitration of the exhaust gas denitration module 2 and a gas sampling analysis assembly 32 for collecting the gas in the gas discharge line assembly 31 for component analysis. The piping arrangement of the gas discharge piping assembly 31 and the specific construction of the gas sampling analysis assembly 32 are the same as in the prior art, and will not be described herein. The PLC 4 regularly extracts the denitrated gas component data in each standard unit period through the gas sampling analysis component 32 for verification, and generates warning information to be sent to a manager when the parameters are abnormal; and packaging gas component data in the production plan after the production plan is completed, and transmitting the waste gas denitration scheme and the production data to a scheme denitration model for sample training. The gas sampling analysis component 32 is used for sampling and monitoring the clean gas after denitration and purification, so that the phenomenon of wrong emission is avoided. Meanwhile, after the production plan is finished, the gas component data, the waste gas denitration scheme and the production data in the production plan are packed and sent to the scheme denitration model for sample training, so that the matching accuracy of the waste gas denitration scheme is verified, the scheme denitration model is continuously perfected, and the matching accuracy of the waste gas denitration scheme is further improved.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the scope of the present application. It will be apparent that the described embodiments are merely some, but not all, embodiments of the application. Based on these embodiments, all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still combine, add or delete features of the embodiments of the present application or make other adjustments according to circumstances without any conflict, so as to obtain different technical solutions without substantially departing from the spirit of the present application, which also falls within the scope of the present application.
Claims (3)
1. A waste gas denitration reaction process is characterized in that: the device comprises an exhaust gas conveying module (1), an exhaust gas denitration module (2), a gas discharge module (3), a PLC (programmable logic controller) 4 and a denitration planning module (5); the waste gas conveying module (1), the waste gas denitration module (2) and the gas discharge module (3) are all connected with the PLC (4), and the PLC (4) is connected with the denitration planning module (5); the waste gas denitration module (2) comprises one or more of an SCR denitration device group, an SNCR denitration device group, an adsorption denitration device group, an acid absorption denitration device group, an alkali absorption denitration device group, an electron beam denitration device group and a microorganism denitration device group; the waste gas conveying module (1) is connected with the waste gas denitration module (2) and is used for conveying waste gas to the waste gas denitration module (2); the gas discharge module (3) is connected with the waste gas denitration module (2) and is used for discharging the gas after denitration treatment of the waste gas denitration module (2); the denitration planning module (5) acquires a production plan in real time, determines an exhaust denitration scheme based on production plan matching, and controls the exhaust conveying module (1), the exhaust denitration module (2) and the gas discharge module (3) to convey, denitrate and discharge the exhaust according to the exhaust denitration scheme through the PLC (4);
the denitration plan module (5) acquires a production plan in real time, determines an exhaust denitration scheme based on production plan matching, and controls the exhaust conveying module (1), the exhaust denitration module (2) and the gas discharge module (3) to convey, denitrate and discharge exhaust according to the exhaust denitration scheme through the PLC (4), wherein the method specifically comprises the following steps of:
the denitration planning module (5) acquires a production plan of a next production cycle of each factory in real time, and determines an exhaust gas denitration requirement in the next production cycle based on production plan measurement, wherein the exhaust gas denitration requirement comprises exhaust gas flow information, exhaust gas component information, exhaust gas temperature information and exhaust gas smoke content information of each standard unit cycle in the production cycle;
determining an exhaust gas denitration scheme based on exhaust gas denitration requirement matching, wherein the exhaust gas denitration scheme comprises at least one group of denitration equipment set setting parameters, a denitration medicament formula and process flow information;
the denitration planning module (5) transmits denitration equipment set setting parameters to the PLC (4) based on an exhaust gas denitration scheme, and the PLC (4) revises parameter settings for the exhaust gas conveying module (1), the exhaust gas denitration module (2) and the gas discharge module (3) in a production plan starting stage;
the denitration planning module (5) generates a scheduling instruction based on an exhaust gas denitration scheme, and schedules production personnel to configure and transport denitration agents;
the PLC (4) controls the waste gas conveying module (1), the waste gas denitration module (2) and the gas discharge module (3) to finish waste gas conveying, denitration purifying and discharge work based on the technological process information;
the method for determining the flue gas denitration scheme based on flue gas denitration demand matching specifically comprises the following steps of:
determining at least one alternative exhaust gas denitration scheme meeting the exhaust gas denitration requirement through matching of a preset scheme matching model based on the exhaust gas denitration requirement;
calculating a scheme score for the candidate exhaust gas denitration scheme determined by matching based on a preset scheme score calculation formula;
sequencing the alternative exhaust gas denitration schemes based on the scheme scores, and selecting the alternative exhaust gas denitration scheme with the highest scheme score as the exhaust gas denitration scheme determined by matching;
the method for calculating the scheme scores of the candidate waste gas denitration scheme determined by matching based on the preset scheme score calculation formula specifically comprises the following steps:
sequencing each alternative waste gas denitration scheme based on the denitration rate, the running cost, the environmental protection coefficient, the operation difficulty and the denitration capacity loading rate respectively to generate a denitration rate sequence, a running cost sequence, an environmental protection coefficient sequence, an operation difficulty sequence and a denitration capacity loading rate sequence, and acquiring a denitration rate sequencing score, a running cost sequencing score, an environmental protection coefficient sequencing score, an operation difficulty sequencing score and a denitration capacity loading rate sequencing score of each waste gas denitration scheme through a preset sequencing ranking comparison table;
acquiring waste gas treatment opinions from a user, selecting any one of the sorting sequences as the highest priority sequence based on the waste gas treatment opinions, using other sorting sequences as the secondary priority sequence, and selecting the production cost sequence as the highest priority sequence by default if the waste gas treatment opinion is not fed back by the user;
calculating the scheme scores of the alternative exhaust gas denitration schemes according to the sequencing scores of the alternative exhaust gas denitration schemes through a preset scheme score calculation formula;
the preset scheme score calculation formula specifically comprises the following steps:
；
wherein the method comprises the steps ofScoring the scheme of the ith alternative flue gas denitration scheme,/->Scoring the highest priority sequence of the ith alternative exhaust gas denitration scheme, +.>The sum of the scores of the sub-priority sequences of the ith alternative exhaust gas denitration scheme is given, T is a sub-priority adjustment coefficient, the default value is 1, and the sum is set by a manager;
each alternative exhaust gas denitration scheme is used for sequencing based on denitration capacity loading rate to generate a denitration capacity loading rate sequence, and specifically comprises the following steps: calculating the absolute value of the difference between the denitration capacity load rate and the preset calibration load rate of each alternative waste gas denitration scheme through a preset load difference calculation formula, and sequencing from small to large based on the absolute value of the difference to generate a denitration capacity load rate sequence;
the preset load difference calculation formula specifically comprises the following steps:
│；
wherein the method comprises the steps ofThe absolute value of the difference between the ith alternative exhaust gas denitration scheme and the preset calibration load rate is set; b is a preset calibration load rate, n is the total standard unit period in the production period, < + >>The denitration capacity load rate of the jth standard unit period is the ith alternative waste gas denitration scheme;
the denitration planning module (5) acquires a production plan of the next production cycle in real time, and determines the waste gas denitration requirement in the next production cycle based on production plan measurement and calculation specifically comprises the following steps:
the denitration planning module (5) acquires a production plan of the next production period in real time, wherein the production plan comprises a production plan of each standard unit period in the next production period and process flow information;
simulating and generating a calibration waste gas generation plan through a preset waste gas simulation model based on the production plan, wherein the calibration waste gas generation plan comprises waste gas flow information, waste gas component information, waste gas temperature information and waste gas smoke content information in each standard unit period in the next production period; the waste gas simulation model is obtained by training a machine learning model through historical production data information;
simulating different characteristic revisions of each production plan in each proceeding stage based on a calibration waste gas production plan through a preset demand adjustment model to generate waste gas denitration demands; the demand adjustment model is a machine learning model which is obtained by training historical production data information.
2. The exhaust gas denitration reaction process according to claim 1, characterized in that: the waste gas conveying module (1) comprises a gas conveying pipeline assembly (11) for conveying waste gas generated by each production factory to the waste gas denitration module (2) and a waste gas sampling analysis assembly (12) for collecting waste gas in the gas conveying pipeline assembly (11) for component analysis, wherein the PLC (4) periodically extracts waste gas component information, waste gas temperature information and waste gas smoke content information of the waste gas generated in each standard unit period through the waste gas sampling analysis assembly (12), performs verification, generates warning information when parameters are abnormal, and sends the warning information to a manager; and after the production plan is finished, packaging the exhaust emission data and the production data in the production plan, and transmitting the exhaust emission data and the production data to an exhaust simulation model and a demand adjustment model for sample training.
3. The exhaust gas denitration reaction process according to claim 1, characterized in that: the gas emission module (3) comprises a gas emission pipeline assembly (31) for emitting clean gas after denitration of the waste gas denitration module (2) and a gas sampling analysis assembly (32) for collecting gas in the gas emission pipeline assembly (31) for component analysis, and the PLC (4) periodically extracts gas component data after denitration in each standard unit period through the gas sampling analysis assembly (32) for verification, and generates warning information to be sent to a manager when parameters are abnormal; and packaging gas component data in the production plan after the production plan is completed, and transmitting the waste gas denitration scheme and the production data to a scheme denitration model for sample training.
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