CN108950176B - Annealing furnace combustion control method and device based on residual oxygen compensation - Google Patents
Annealing furnace combustion control method and device based on residual oxygen compensation Download PDFInfo
- Publication number
- CN108950176B CN108950176B CN201810713649.6A CN201810713649A CN108950176B CN 108950176 B CN108950176 B CN 108950176B CN 201810713649 A CN201810713649 A CN 201810713649A CN 108950176 B CN108950176 B CN 108950176B
- Authority
- CN
- China
- Prior art keywords
- flue gas
- content
- oxygen
- upper limit
- real
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 239000001301 oxygen Substances 0.000 title claims abstract description 89
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 88
- 238000000137 annealing Methods 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003546 flue gas Substances 0.000 claims abstract description 149
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 145
- 239000000446 fuel Substances 0.000 claims abstract description 40
- 238000012937 correction Methods 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 238000005097 cold rolling Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000004590 computer program Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention relates to the technical field of cold rolling, in particular to an annealing furnace combustion control method based on residual oxygen compensation, which comprises the steps of setting an upper limit value of CO content in flue gas; detecting the real-time content of CO in the flue gas; comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; and stopping introducing oxygen into the flue gas when the CO content is less than or equal to the upper limit value of the CO content. According to the annealing furnace combustion control method based on residual oxygen compensation, provided by the embodiment of the invention, the real-time content of CO in flue gas is compared with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; when the content of CO is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas; the real-time adjustment of the air-fuel ratio of the flue gas is realized by monitoring the CO content in the flue gas in real time and by an oxygen compensation mode.
Description
Technical Field
The invention relates to the technical field of cold rolling, in particular to a method and a device for controlling combustion of an annealing furnace based on residual oxygen compensation.
Background
The cold rolling annealing furnace is an important means for maintaining the optimal air-fuel ratio, improving the combustion efficiency and reducing the heat loss by reasonably controlling the oxygen content in the waste gas on site. The heating stages in the annealing furnace perform different functions during heating, and therefore the air-fuel ratio settings of the respective stages are different. The oxygen content in the flue gas of each heating section is controlled so as to keep the optimal air-fuel ratio, and the method plays an important role in improving the combustion quality of the heating furnace. At present, the control means for the oxygen content in the flue gas of the heating section is deficient.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling the combustion of an annealing furnace based on residual oxygen compensation, and solves the technical problems that the oxygen content in the smoke of a cold-rolling annealing furnace is difficult to effectively control and the optimal air-fuel ratio is kept in the prior art.
In order to solve the above technical problem, in a first aspect, an embodiment of the present invention provides a method for controlling combustion of an annealing furnace based on residual oxygen compensation, including: setting the upper limit value of the CO content of the flue gas in the heating section of the annealing furnace; detecting the real-time content of CO in the flue gas; comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; and when the real-time content of CO in the flue gas is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas.
Further, the correction formula Air/Gas Ratio is adopted as A (O)corr+SP)2+B(OcorrCalculating the content of oxygen introduced into the flue gas by using + SP) + C;
wherein, the Air/Gas Ratio is the Air-fuel Ratio of the flue Gas; A. b, C is determination coefficient; SP is a set value of the oxygen content in the flue gas; o isCORRIs an oxygen correction factor.
Further, the correction formula Air/Gas Ratio is adopted as A (O)corr+SP)2+B(Ocorr+ SP) + C when O is in the process of oxygen gas introduction into the flue gascorrAnd stopping introducing oxygen into the flue gas when the value of + SP reaches 8% or more and the real-time content of CO is still greater than the upper limit value of the content of CO.
Further, the value of A is 113.85; the value of B is 6.496, and the value of C is 2.47.
Further, the set value of the oxygen content set value SP in the smoke is 4% -8%.
Further, the oxygen correction coefficient OCORRStep size of (2) is 1%.
In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides an annealing furnace combustion control apparatus based on residual oxygen compensation, including:
the parameter setting unit is used for setting the upper limit value of the CO content of the flue gas in the heating section of the annealing furnace;
the detection unit is used for detecting the real-time content of CO in the flue gas;
and the comparison unit is used for acquiring the upper limit value of the CO content from the parameter setting unit, acquiring the real-time content of the CO in the flue gas from the detection unit, and comparing the real-time content of the CO in the flue gas with the upper limit value of the CO content.
And the processing unit is used for obtaining a comparison result from the comparison unit, controlling to introduce oxygen into the flue gas to improve the air-fuel ratio of the flue gas when the real-time content of CO in the flue gas is greater than the upper limit value of the content of CO, and controlling to stop introducing oxygen into the flue gas when the real-time content of CO in the flue gas is less than or equal to the upper limit value of the content of CO.
Further, the processing unit adopts a modified formula of Air/Gas Ratio ═ a (O)corr+SP)2+B(OcorrCalculating the content of oxygen introduced into the flue gas by + SP) + C;
wherein the Air/Gas Ratio is a flue Gas Air-fuel Ratio; a, B and C are determination coefficients; the SP is a set value of the oxygen content in the flue gas; said O isCORRIs an oxygen correction factor.
In a third aspect, based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the following steps:
setting an upper limit value of the CO content of the flue gas in the heating section of the annealing furnace;
detecting the real-time content of CO in the flue gas;
comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO;
when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas, and when the content of CO is smaller than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas.
In a fourth aspect, based on the same inventive concept, the embodiment of the present invention further provides an annealing furnace combustion control device based on residual oxygen compensation, comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the following steps:
setting an upper limit value of the CO content in the flue gas in the heating section of the annealing furnace; detecting the real-time content of CO in the flue gas; comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; and when the content of CO in the flue gas is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas.
One or more technical schemes provided by the embodiment of the invention at least have the following beneficial effects or advantages:
according to the annealing furnace combustion control method based on residual oxygen compensation, provided by the embodiment of the invention, the real-time content of CO in flue gas is compared with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; when the content of CO is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas; the air-fuel ratio of the flue gas is adjusted in real time in an oxygen compensation mode, whether the air-fuel ratio of the flue gas reaches an optimal state is indirectly determined by monitoring the content of CO in the flue gas, so that the air-fuel ratio of the flue gas is dynamically maintained in the optimal state, and the combustion quality of the heating furnace is improved.
Drawings
FIG. 1 is a flow chart of a combustion control method for an annealing furnace based on residual oxygen compensation according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a combustion control device of an annealing furnace based on residual oxygen compensation according to an embodiment of the present invention;
FIG. 3 is a block diagram of a computer program according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a combustion control system of an annealing furnace based on residual oxygen compensation according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the combustion of an annealing furnace based on residual oxygen compensation, and solves the technical problems that the oxygen content in the smoke of a cold-rolling annealing furnace is difficult to effectively control and the optimal air-fuel ratio is kept in the prior art.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, an embodiment of the present invention provides a combustion control method for an annealing furnace based on residual oxygen compensation, including the following steps:
step S10, setting the upper limit value of the CO content in the flue gas in the heating section of the annealing furnace, for example, the upper limit value of the CO content is set to be 100 × 10 in the embodiment-6ppm。
And step S20, detecting the real-time content of CO in the flue gas.
And step S30, comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO.
Step S40, when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; and stopping introducing oxygen into the flue gas when the CO content is less than or equal to the upper limit value of the CO content. The air-fuel ratio of the flue gas is adjusted in real time in an oxygen compensation mode, and whether the air-fuel ratio of the flue gas reaches an optimal state is indirectly determined by monitoring the content of CO in the flue gas. The air-fuel ratio of the flue gas refers to the ratio of the air flow in the flue gas to the mixed gas flow.
In one embodiment of the present invention, a correction formula is employed
Air/Gas Ratio＝A(Ocorr+SP)2+B(OcorrAnd calculating the content of the introduced oxygen in the flue gas by using + SP) + C.
Wherein, the Air/Gas Ratio is the Air-fuel Ratio of the flue Gas; A. b, C is determination coefficient; SP is a set value of oxygen content in the flue gas; o isCORRIs an oxygen correction factor.
The correction formula corrects the coefficient O by adjusting oxygenCORRThe air-fuel ratio of the flue gas is directly adjusted, and whether the air-fuel ratio of the flue gas reaches an optimal state is indirectly determined by monitoring the content of CO in the flue gas.
In one embodiment of the present invention, a correction formula is employed
Air/Gas Ratio＝A(Ocorr+SP)2+B(Ocorr+ SP) + C when O is introduced into the flue gascorrWhen the value of + SP reaches 8% or more and the real-time content of CO is still greater than the upper limit value of the content of CO, stopping introducing oxygen into the flue gas; the purpose is to prevent the oxygen content from being excessive and affecting the service life of the radiant tube.
In an embodiment of the present invention, in order to improve the accuracy of the correction formula, the oxygen correction coefficient O is adjusted more accuratelyCORRAdjusting the Air-fuel Ratio Air/Gas Ratio of the flue Gas, and taking A as 113.85; the value of B is 6.496, and the value of C is 2.47.
In an embodiment of the present invention, in order to improve the accuracy of the correction formula, the oxygen correction coefficient O is adjusted more accuratelyCORRAdjusting the Air-fuel Ratio Air/Gas Ratio of the flue Gas, and setting the set value SP of the oxygen content in the flue Gas to be 4% -8%, for example: 4%, or 5%, or 6%, or 7%, or 8%.
In a specific embodiment of the invention, in order to improve the regulation sensitivity of the Air-fuel Ratio Air/Gas Ratio of the flue Gas, the oxygen is corrected by a coefficient OCORRIs set to 1%.
Example two
Referring to fig. 2, based on the same inventive concept, an embodiment of the present invention provides an annealing furnace combustion control apparatus 200 based on residual oxygen compensation, comprising:
and the parameter setting unit 210 is used for setting an upper limit value of the CO content in the flue gas of the heating section of the annealing furnace.
And the detection unit 220 is used for detecting the real-time content of CO in the flue gas.
The comparing unit 230 is configured to obtain the upper limit value of the CO content from the parameter setting unit 210, obtain the real-time content of CO in the flue gas from the detecting unit 220, and compare the real-time content of CO in the flue gas with the upper limit value of the CO content.
And the processing unit 240 is configured to obtain the comparison result from the comparison unit 230, control to introduce oxygen into the flue gas to increase the air-fuel ratio of the flue gas when the real-time content of CO in the flue gas is greater than the upper limit value of the CO content, and control to stop introducing oxygen into the flue gas when the CO content is less than or equal to the upper limit value of the CO content.
In an embodiment of the present invention, the processing unit 240 uses a modified formula of Air/Gas Ratio ═ a (O)corr+SP)2+B(OcorrAnd calculating the content of the introduced oxygen in the flue gas by using + SP) + C.
Wherein, the Air/Gas Ratio is the Air-fuel Ratio of the flue Gas; A. b and C are determination coefficients; SP is a set value of oxygen content in the flue gas; o isCORRIs an oxygen correction factor.
EXAMPLE III
Referring to fig. 3, based on the same inventive concept, an embodiment of the present invention provides a computer-readable storage medium 300, on which a computer program 310 is stored, where the program 310, when executed by a processor, implements the following steps:
and setting the upper limit value of the CO content in the flue gas of the heating section of the annealing furnace.
And detecting the real-time content of CO in the flue gas.
And comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO.
When the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas, and when the content of CO is smaller than or equal to the upper limit value of the content of CO, stopping introducing the oxygen into the flue gas.
In a specific implementation, the program 310 may implement any one of the first embodiment when executed by a processor.
Example four
Referring to fig. 4, based on the same inventive concept, an embodiment of the present invention further provides an annealing furnace combustion control system 400 based on residual oxygen compensation, comprising a memory 410, a processor 420, and a computer program stored in the memory 410 and operable on the processor 420, wherein the processor 420 executes the computer program to implement the following steps:
setting an upper limit value of the CO content in the flue gas in the heating section of the annealing furnace; detecting the real-time content of CO in the flue gas; comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; and when the CO content in the flue gas is less than or equal to the upper limit value of the CO content, stopping introducing oxygen into the flue gas.
One or more technical schemes provided by the embodiment of the invention at least have the following beneficial effects or advantages:
according to the annealing furnace combustion control method based on residual oxygen compensation, provided by the embodiment of the invention, the real-time content of CO in flue gas is compared with the upper limit value of the content of CO; when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; when the content of CO is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas; the air-fuel ratio of the flue gas is adjusted in real time in an oxygen compensation mode, whether the air-fuel ratio of the flue gas reaches an optimal state is indirectly determined by monitoring the content of CO in the flue gas, so that the air-fuel ratio of the flue gas is dynamically maintained in the optimal state, and the combustion quality of the heating furnace is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (2)
1. A combustion control method of an annealing furnace based on residual oxygen compensation is characterized by comprising the following steps:
setting the upper limit value of the CO content of the flue gas in the heating section of the annealing furnace;
detecting the real-time content of CO in the flue gas;
comparing the real-time content of CO in the flue gas with the upper limit value of the content of CO;
when the real-time content of CO in the flue gas is larger than the upper limit value of the content of CO, introducing oxygen into the flue gas to improve the air-fuel ratio of the flue gas; when the real-time content of CO in the flue gas is less than or equal to the upper limit value of the content of CO, stopping introducing oxygen into the flue gas; adopting a correction formula of Air/Gas Ratio ═ A (O)corr+SP)2+B(OcorrCalculating the content of oxygen introduced into the flue gas by using + SP) + C;
wherein, the Air/Gas Ratio is the Air-fuel Ratio of the flue Gas; A. b, C is a determination coefficient, wherein A takes the value 113.85; the value of B is 6.496, and the value of C is 2.47; the SP is a set value of the oxygen content in the smoke, and the set value of the SP is 4-7%; o isCORRIs an oxygen correction factor, the oxygen correction factor OCORRStep size of (1%);
adopting a correction formula of Air/Gas Ratio ═ A (O)corr+SP)2+B(Ocorr+ SP) + C when O is in the process of oxygen gas introduction into the flue gascorrAnd stopping introducing oxygen into the flue gas when the value of + SP reaches 8% or more and the real-time content of CO is still greater than the upper limit value of the content of CO.
2. The utility model provides an annealing stove burning controlling means based on residual oxygen compensation which characterized in that includes:
the parameter setting unit is used for setting the upper limit value of the CO content of the flue gas in the heating section of the annealing furnace;
the detection unit is used for detecting the real-time content of CO in the flue gas;
the comparison unit is used for acquiring the upper limit value of the CO content from the parameter setting unit, acquiring the real-time content of the CO in the flue gas from the detection unit, and comparing the real-time content of the CO in the flue gas with the upper limit value of the CO content;
the processing unit is used for obtaining a comparison result from the comparison unit, controlling to introduce oxygen into the flue gas to improve the air-fuel ratio of the flue gas when the real-time content of CO in the flue gas is greater than the upper limit value of the content of CO, and controlling to stop introducing oxygen into the flue gas when the real-time content of CO in the flue gas is less than or equal to the upper limit value of the content of CO; the processing unit adopts a correction formula of Air/Gas Ratio ═ A (O)corr+SP)2+B(OcorrCalculating the content of oxygen introduced into the flue gas by + SP) + C;
wherein the Air/Gas Ratio is a flue Gas Air-fuel Ratio; a, B and C are determination coefficients, and A takes the value 113.85; the value of B is 6.496, and the value of C is 2.47; the SP is a set value of oxygen content in the smoke, and the set value of the SP is 4-7%; said O isCORRIs an oxygen correction factor, the oxygen correction factor OCORRStep size of (1%);
adopting a correction formula of Air/Gas Ratio ═ A (O)corr+SP)2+B(Ocorr+ SP) + C when O is in the process of oxygen gas introduction into the flue gascorrAnd stopping introducing oxygen into the flue gas when the value of + SP reaches 8% or more and the real-time content of CO is still greater than the upper limit value of the content of CO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713649.6A CN108950176B (en) | 2018-06-29 | 2018-06-29 | Annealing furnace combustion control method and device based on residual oxygen compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810713649.6A CN108950176B (en) | 2018-06-29 | 2018-06-29 | Annealing furnace combustion control method and device based on residual oxygen compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108950176A CN108950176A (en) | 2018-12-07 |
| CN108950176B true CN108950176B (en) | 2020-08-21 |
Family
ID=64484970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810713649.6A Active CN108950176B (en) | 2018-06-29 | 2018-06-29 | Annealing furnace combustion control method and device based on residual oxygen compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108950176B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110144440B (en) * | 2019-05-24 | 2021-08-20 | 首钢京唐钢铁联合有限责任公司 | Method and device for controlling residual oxygen amount of annealing furnace |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1056864B (en) * | 1975-03-12 | 1982-02-20 | Friedrichsfeld Gmbh | COMPOSITE REGULATOR FOR BURNERS |
| JP3150390B2 (en) * | 1991-10-29 | 2001-03-26 | 株式会社ガスター | Combustion control method for combustion device |
| JP2010065867A (en) * | 2008-09-09 | 2010-03-25 | Hanshin Electric Co Ltd | Combustion control device of combustion device |
| CN103486607B (en) * | 2013-09-30 | 2015-07-15 | 攀钢集团攀枝花钢钒有限公司 | Automatic fuel adjustment system and method of multi-fuel fired boiler |
| CN103672948B (en) * | 2013-12-13 | 2016-04-27 | 聚光科技(杭州)股份有限公司 | The combustion control system of industrial furnace and control method |
| CN104561514B (en) * | 2015-01-09 | 2017-05-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Double heat accumulating type steel rolling heating furnace oxidizing atmosphere adjustment method and automatic control method thereof |
-
2018
- 2018-06-29 CN CN201810713649.6A patent/CN108950176B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108950176A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101876449B (en) | Method of controlling oxygen air-flowing environment in heating furnace | |
| CN108950176B (en) | Annealing furnace combustion control method and device based on residual oxygen compensation | |
| TW201638528A (en) | Combustion controlling device, combustion controlling method, combustion controlling program, and computer-readable recording medium | |
| CN114107653A (en) | Annealing furnace temperature control method, device and system | |
| CN111217203A (en) | Tension control method and system of tensioner | |
| TW200741880A (en) | Temperature regulation method | |
| CN110306017B (en) | Annealing furnace proportion control type burner air-fuel ratio control method and system | |
| JP2008297968A (en) | Control device for internal combustion engine | |
| CN112325327B (en) | Proportion control type burner residual oxygen amount correction method and device | |
| CN110231844B (en) | Method and system for controlling mixed heat value, pressure and sulfur content of various gases | |
| CN110594995B (en) | Control method and device for improving low-temperature heating comfort of air conditioner, air conditioner and readable storage medium | |
| CN104817254A (en) | Intelligent regulating method for furnace pressure of glass melting furnace | |
| CN115017449B (en) | Frequency deviation calculation method and system suitable for different damping ratios of second-order system | |
| CN112666834B (en) | Heating furnace temperature control method adaptive to severe fluctuation of fuel gas heat value | |
| JP2008001816A (en) | Combustion-controlling method in coke oven | |
| CN114198914B (en) | Automatic combustion control method of hot blast stove based on dynamic tracking slope idea | |
| CN114810392A (en) | Method for determining fuel gas demand of engine and related device | |
| CN115200227A (en) | Gas water heater control method and device, gas water heater and storage medium | |
| CN108277314B (en) | Material distribution method and device | |
| CN107782165A (en) | Air-fuel ratio adjusting method for heating furnace | |
| CN114020073A (en) | Heating furnace PID upper and lower limit self-adaption based control method and system | |
| CN109579044B (en) | Air-fuel ratio dynamic feedforward combustion control method for walking beam furnace | |
| US20160091880A1 (en) | Control Device and Control Method | |
| CN110607434A (en) | Annealing furnace pressure control method and device | |
| CN110736106A (en) | data control method and device and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |