CN114100330A - Ammonia spraying automatic control method and system for nitrogen oxide emission of industrial enterprise - Google Patents
Ammonia spraying automatic control method and system for nitrogen oxide emission of industrial enterprise Download PDFInfo
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- CN114100330A CN114100330A CN202111314006.2A CN202111314006A CN114100330A CN 114100330 A CN114100330 A CN 114100330A CN 202111314006 A CN202111314006 A CN 202111314006A CN 114100330 A CN114100330 A CN 114100330A
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- ammonia injection
- injection amount
- nitrogen oxide
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 239
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 184
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 119
- 238000005507 spraying Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002347 injection Methods 0.000 claims abstract description 89
- 239000007924 injection Substances 0.000 claims abstract description 89
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000007781 pre-processing Methods 0.000 claims abstract description 12
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 150000004767 nitrides Chemical class 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 4
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/346—Controlling the process
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
Abstract
The invention discloses an ammonia injection automatic control method and system for nitrogen oxides discharged by industrial enterprises, which comprises the steps of preprocessing pre-collected ammonia injection amount data and nitrogen oxide data at an outlet; defining a target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and nitrogen oxide data at an outlet; and returning the ammonia injection amount at the next moment to a control center for chemical reaction control according to the target ammonia injection amount. According to the technical scheme, the ammonia spraying amount data and the outlet nitride data can be processed, the ammonia spraying amount is automatically controlled and adjusted, the nitrogen oxide at the outlet can be guaranteed not to exceed the standard, and the labor and the ammonia spraying amount can be saved.
Description
Technical Field
The invention relates to the technical field of ammonia injection control, in particular to an ammonia injection automatic control method and system for nitrogen oxide emission of industrial enterprises.
Background
At present, domestic and foreign industrial enterprises mostly adopt a method of manually adding ammonia injection for controlling the concentration of nitric oxide at an exhaust port to exceed the standard, namely, manual shifts stare at the concentration of nitric oxide at the exhaust port, and when the concentration of nitric oxide exceeds the standard, the dosage of ammonia injection at the inlet is immediately increased.
However, the existing method for manually adding ammonia injection not only needs a lot of manpower, but also can cause waste of liquid ammonia and overproof of outlet nitric oxide due to the fact that manual work cannot accurately regulate and control.
Disclosure of Invention
Aiming at the defects in the prior art, the ammonia spraying automatic control method and the ammonia spraying automatic control system for the nitrogen oxides discharged by the industrial enterprises, which are provided by the invention, can automatically control and adjust the ammonia spraying amount by processing the ammonia spraying amount data and the outlet nitride data, not only can ensure that the nitrogen oxides at the outlet do not exceed the standard, but also can save manpower and the ammonia spraying amount.
The technical scheme of the invention is as follows:
an ammonia injection automatic control method for nitrogen oxide emission of industrial enterprises, which comprises the following steps:
preprocessing pre-collected ammonia spraying amount data and outlet nitrogen oxide data;
defining a target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and nitrogen oxide data at an outlet;
and carrying out chemical reaction control on the ammonia injection amount at the next moment according to the target ammonia injection amount.
Preferably, the pre-collecting of the ammonia injection amount data and the nitrogen oxide data at the outlet comprises:
accessing an enterprise data system;
and acquiring ammonia spraying amount data and outlet nitrogen oxide data transmitted by the enterprise data system in real time.
Preferably, the preprocessing the pre-collected ammonia injection amount data and the nitrogen oxide data at the outlet comprises:
and filtering the received ammonia spraying amount data and the nitrogen oxide data at the outlet, and deleting abnormal and unreasonable data.
Further, the defining the target ammonia injection amount according to the ammonia injection amount data obtained after the preprocessing and the nitrogen oxide data at the outlet comprises:
obtaining the ammonia spraying amount data beta obtained after the pretreatmenttAnd outlet nitrogen oxide data thetat；
Threshold value alpha of discharge standard of outlet nitrogen oxide set according to national environmental protection standard requirement0Calculating the ammonia injection amount data betatThe amount of adjustment of (a);
and determining the target ammonia injection amount at the next moment based on the adjustment amount.
Further, next-moment ammonia injection amount data β is determined by the following equationtThe adjustment amount of (2):
σ＝λ×(θt-α0)+γ×(θt-θt-1)+c
wherein σ represents the magnitude of the adjustment amount; lambda, lambda,γAll represent a coefficient of variation, and c is a constant.
Preferably, the target ammonia injection amount is determined by the following formula: y ═ betat+σ。
Preferably, the controlling the chemical reaction of the ammonia injection amount at the next timing based on the target ammonia injection amount includes:
every t0Updating the target ammonia injection amount y according to the current outlet nitrogen oxide level; transmitting y to a control center to be used as the ammonia spraying amount at the next moment to carry out chemical reaction control;
wherein, t0The time interval for controlling the ammonia injection amount chemical reaction.
An ammonia injection autonomous system for nitrogen oxide emission of an industrial enterprise, the system comprising:
the processing module is used for preprocessing the pre-collected ammonia spraying amount data and the nitrogen oxide data at the outlet;
the defining module is used for defining the target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and the nitrogen oxide data at the outlet;
and the control module is used for carrying out chemical reaction control on the ammonia injection amount at the next moment according to the target ammonia injection amount.
The invention has the beneficial effects that:
the invention provides an ammonia injection automatic control method and system for nitrogen oxide emission of industrial enterprises, aiming at the current situation of manually adjusting ammonia injection at present, the technology is innovative and the regulation and control become simple.
The technical scheme of the invention is already applied to partial power plants, and the result shows that the ammonia injection amount can be saved.
The technical scheme of the invention can effectively control the nitrogen oxide of the outlet pollutant not to exceed the standard, and is better than manual regulation and control.
The artificial intelligence and data analysis are applied to practice, and the problem is solved more scientifically and accurately.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a flow chart of an ammonia injection self-control method for nitrogen oxide emission of an industrial enterprise according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The invention provides an ammonia injection automatic control method for nitrogen oxide emission of industrial enterprises, which comprises the following steps of:
s1, preprocessing pre-collected ammonia injection amount data and nitrogen oxide data at an outlet;
s2, defining a target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and the nitrogen oxide data at the outlet;
s3, according to the target ammonia injection amount, the chemical reaction control is carried out on the ammonia injection amount at the next moment.
In step S1, the pre-collecting of the ammonia injection amount data and the outlet nitrogen oxide data includes:
accessing an enterprise data system;
and acquiring ammonia spraying amount data and outlet nitrogen oxide data transmitted by the enterprise data system in real time.
The preprocessing of the ammonia injection amount data and the outlet nitrogen oxide data collected in advance in the step S1 includes:
and filtering the received ammonia spraying amount data and the nitrogen oxide data at the outlet, and deleting abnormal and unreasonable data.
In step S2, the defining a target ammonia injection amount according to the pre-processed ammonia injection amount data and the outlet nitrogen oxide data includes:
obtaining the ammonia spraying amount data beta obtained after the pretreatmenttAnd outlet nitrogen oxide data thetat；
Threshold value alpha of discharge standard of outlet nitrogen oxide set according to national environmental protection standard requirement0Calculating the ammonia injection amount data betatThe amount of adjustment of (a);
and determining the target ammonia injection amount at the next moment based on the adjustment amount.
Determining next moment ammonia injection amount data beta by the following formulatThe adjustment amount of (2):
σ＝λ×(θt-α0)+γ×(θt-θt-1)+c
wherein σ represents the magnitude of the adjustment amount; lambda, lambda,γAll represent a coefficient of variation, and c is a constant.
Determining the target ammonia injection amount by the following formula: y ═ betat+σ。
In step S3, the controlling the chemical reaction of the ammonia injection amount at the next time according to the target ammonia injection amount includes:
every t0Updating the target ammonia injection amount y according to the current outlet nitrogen oxide level; transmitting y to a control center to be used as the ammonia spraying amount at the next moment to carry out chemical reaction control;
wherein, t0The time interval for controlling the ammonia injection amount chemical reaction.
Based on the above inventive concept, this embodiment further provides an ammonia injection automatic control system for nitrogen oxide emission of industrial enterprises, where the system includes:
the processing module is used for preprocessing the pre-collected ammonia spraying amount data and the nitrogen oxide data at the outlet;
the defining module is used for defining the target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and the nitrogen oxide data at the outlet;
and the control module is used for carrying out chemical reaction control on the ammonia injection amount at the next moment according to the target ammonia injection amount.
Wherein the processing module comprises: the acquisition unit is used for acquiring ammonia spraying amount data and nitrogen oxide data at an outlet in advance; the acquisition unit further comprises: the access subunit is used for accessing the enterprise data system; and the acquisition subunit is used for acquiring the ammonia injection amount data transmitted by the enterprise data system in real time and the nitrogen oxide data at the outlet.
And the preprocessing unit is used for filtering the received ammonia spraying amount data and the nitrogen oxide data at the outlet and deleting abnormal and unreasonable data.
The definition module comprises:
an acquisition unit for acquiring the ammonia injection amount data beta obtained after the pretreatmenttAnd outlet nitrogen oxide dataθt；
A calculation unit for calculating a threshold value alpha of the emission standard of the export nitric oxide set according to the national environmental protection standard requirement0Calculating the ammonia injection amount data betatThe amount of adjustment of (a);
σ＝λ×(θt-α0)+γ×(θt-θt-1)+c
wherein σ represents the magnitude of the adjustment amount; lambda, lambda,γAll represent a coefficient of variation, and c is a constant.
A determination unit for determining a target ammonia injection amount at the next moment based on the magnitude of the adjustment amount;
the target ammonia injection amount is determined by the following formula: y ═ betat+σ。
A control module including a control unit for controlling the operation of the motor at intervals of t0Updating the target ammonia injection amount y according to the current outlet nitrogen oxide level; transmitting y to a control center to be used as the ammonia spraying amount at the next moment to carry out chemical reaction control;
wherein, t0The time interval for controlling the ammonia injection amount chemical reaction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (8)
1. An ammonia injection automatic control method for nitrogen oxide emission of industrial enterprises is characterized by comprising the following steps:
preprocessing pre-collected ammonia spraying amount data and outlet nitrogen oxide data;
defining a target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and nitrogen oxide data at an outlet;
and carrying out chemical reaction control on the ammonia injection amount at the next moment according to the target ammonia injection amount.
2. The method of claim 1, wherein the pre-collecting of ammonia injection quantity data and outlet nitrogen oxide data comprises:
accessing an enterprise data system;
and acquiring ammonia spraying amount data and outlet nitrogen oxide data transmitted by the enterprise data system in real time.
3. The method of claim 1, wherein the preprocessing of the pre-collected ammonia injection amount data and the outlet nitrogen oxide data comprises:
and filtering the received ammonia spraying amount data and the nitrogen oxide data at the outlet, and deleting abnormal and unreasonable data.
4. The method of claim 3, wherein defining a target ammonia injection amount based on the pre-processed ammonia injection amount data and the outlet nox data comprises:
obtaining the ammonia spraying amount data beta obtained after the pretreatmenttAnd outlet nitrogen oxide data thetat；
Threshold value alpha of discharge standard of outlet nitrogen oxide set according to national environmental protection standard requirement0Calculating the ammonia injection amount data betatThe amount of adjustment of (a);
and determining the target ammonia injection amount at the next moment based on the adjustment amount.
5. The method of claim 4, wherein the next-moment ammonia injection data β is determined by the following equationtThe adjustment amount of (2):
σ＝λ×(θt-α0)+γ×(θt-θt-1)+c
wherein σ represents the magnitude of the adjustment amount; lambda, lambda,γAll represent a coefficient of variation, and c is a constant.
6. The method of claim 1 wherein the target ammonia injection amount is determined by the following equation: y ═ betat+σ。
7. The method of claim 1, wherein the controlling the chemical reaction of the ammonia injection amount at the next time based on the target ammonia injection amount comprises:
every t0Updating the target ammonia injection amount y according to the current outlet nitrogen oxide level; transmitting y to a control center to be used as the ammonia spraying amount at the next moment to carry out chemical reaction control;
wherein, t0The time interval for controlling the ammonia injection amount chemical reaction.
8. An ammonia injection automatic control system for nitrogen oxide emission of industrial enterprises is characterized by comprising:
the processing module is used for preprocessing the pre-collected ammonia spraying amount data and the nitrogen oxide data at the outlet;
the defining module is used for defining the target ammonia injection amount according to the ammonia injection amount data obtained after pretreatment and the nitrogen oxide data at the outlet;
and the control module is used for carrying out chemical reaction control on the ammonia injection amount at the next moment according to the target ammonia injection amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314006.2A CN114100330B (en) | 2021-11-08 | Ammonia spraying automatic control method and system for nitrogen oxides discharged by industrial enterprises |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111314006.2A CN114100330B (en) | 2021-11-08 | Ammonia spraying automatic control method and system for nitrogen oxides discharged by industrial enterprises |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114100330A true CN114100330A (en) | 2022-03-01 |
| CN114100330B CN114100330B (en) | 2024-04-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843224A (en) * | 1981-09-10 | 1983-03-12 | Mitsui Mining Co Ltd | Dry type flue gas desulfurization and denitration method |
| US20010026785A1 (en) * | 2000-03-30 | 2001-10-04 | Satoshi Wakasa | Method for controlling NOx removal system in boiler |
| US20080175774A1 (en) * | 2007-01-24 | 2008-07-24 | General Electric Company | Methods and systems for reducing NOx emissions in industrial combustion systems |
| CN102553421A (en) * | 2012-01-20 | 2012-07-11 | 上海泰欣环保设备成套有限公司 | Denitration method in SNCR (selective non catalytic reduction) furnace for exactly realizing temperature window tracking |
| CN214389548U (en) * | 2020-11-12 | 2021-10-15 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Denitration control system for boiler flue gas |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843224A (en) * | 1981-09-10 | 1983-03-12 | Mitsui Mining Co Ltd | Dry type flue gas desulfurization and denitration method |
| US20010026785A1 (en) * | 2000-03-30 | 2001-10-04 | Satoshi Wakasa | Method for controlling NOx removal system in boiler |
| US20080175774A1 (en) * | 2007-01-24 | 2008-07-24 | General Electric Company | Methods and systems for reducing NOx emissions in industrial combustion systems |
| CN102553421A (en) * | 2012-01-20 | 2012-07-11 | 上海泰欣环保设备成套有限公司 | Denitration method in SNCR (selective non catalytic reduction) furnace for exactly realizing temperature window tracking |
| CN214389548U (en) * | 2020-11-12 | 2021-10-15 | 北方联合电力有限责任公司呼和浩特金桥热电厂 | Denitration control system for boiler flue gas |
Non-Patent Citations (1)
| Title |
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| 俞金寿 主编: "《工业过程先进控制技术》", 华东理工大学出版社, pages: 99 - 100 * |
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