CN111780155A - Control system and control method for high-efficiency combustion hot blast stove - Google Patents
Control system and control method for high-efficiency combustion hot blast stove Download PDFInfo
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004364 calculation method Methods 0.000 claims abstract description 58
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- 239000000446 fuel Substances 0.000 claims abstract description 30
- 238000012937 correction Methods 0.000 claims abstract description 26
- 239000003034 coal gas Substances 0.000 claims abstract description 13
- 230000004069 differentiation Effects 0.000 claims abstract description 13
- 230000010354 integration Effects 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 83
- 239000000779 smoke Substances 0.000 claims description 46
- 239000004071 soot Substances 0.000 claims description 19
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 abstract description 6
- 230000000630 rising effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000571 coke Substances 0.000 abstract description 3
- 230000033764 rhythmic process Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/022—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using electronic means
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
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Abstract
The invention discloses a control system and a control method of a high-efficiency combustion hot blast stove, which belong to the technical field of combustion hot blast stove control systems, after a combustion process enters a stable state, a fuzzy control method is adopted, the system starts the control of the combustion rhythm of the hot blast stove, the fuel supply is quickly corrected by an air-fuel ratio calculation and correction module according to the difference value and the change rate of the actual rising value of data acquired by a residual oxygen acquisition module and a temperature acquisition module in a sampling period and the initially calculated standard rising value, the internal circulation control is carried out by a PID (proportion integration differentiation) regulation and control module group, the control completely imitates the judgment and the operation of a person on the combustion speed, the control of the combustion speed of the hot blast stove is automatically realized, the control effect is very obvious, the average air temperature is improved to realize the coke ratio of cultivated land or save coal gas.
Description
Technical Field
The invention relates to a control system of a combustion hot blast stove, in particular to a control system of a high-efficiency combustion hot blast stove, and also relates to a control method of the combustion hot blast stove, in particular to a control method of the high-efficiency combustion hot blast stove, belonging to the technical field of the control system of the combustion hot blast stove.
Background
The low-carbon energy-saving, consumption-reducing and cost-reducing, scientific and technological innovation and environment-friendly circular economy are urgent requirements of each enterprise, and economy, quality and quickness can be developed only by insisting on saving development, clean development and safe development. Further enhancing the reduction of consumption, energy conservation and emission reduction, fully utilizing energy, meeting the urgent need of global climate change and being the responsibility which should be born by people, therefore, the reduction of fuel consumption, the improvement of enterprise profitability and market competitiveness, the technical innovation of enterprise production technology and the contribution which cannot be pushed away become the responsibility of people.
The hot blast stove is an important component of blast furnace ironmaking equipment, in recent years, although the hot blast stove technology is continuously developed, most domestic hot blast stove combustion stage control is manual, and the control process of the hot blast stove is influenced by a plurality of external environments and internal factors.
The current situation of domestic hot blast furnaces:
1. pure manual furnace burning: the common small blast furnace hot blast stove completely depends on manually changing the set value of an instrument or the set value of a computer picture PLC to manually adjust the gas flow and the air flow.
2. Gas flow only air flow automatic adjustment: at present, more regulating methods are adopted in China, an operator gives a gas flow value and an air flow value according to experience, and a PLC (programmable logic controller) or a DCS (distributed control system) respectively performs closed-loop regulation or cascade regulation on the two flows.
3. Automatic furnace burning: on medium and small blast furnaces, artificial intelligent fuzzy control is mostly carried out through basic measurement values, and automatic furnace burning can be realized without expensive detection instruments; the large-level blast furnace mostly adopts a fuzzy control system with gas heat value feedforward and waste oxygen content feedback, and the popularization of the technology is limited due to the maintenance difficulty caused by the expensive detection equipment and the quality problem of the detection equipment, but the technology has a certain development prospect with the increasing maturity of the detection equipment technology.
At present, the heating control of the hot blast stove is mostly manual control, which not only needs special people to operate, but also is difficult to set the flow of gas and combustion-supporting air in time at each stage of the whole combustion period of the hot blast stove, and is also difficult to correct the gas and air quantity heated by the hot blast stove in time when the temperature of preheated gas and air changes, the temperature and flow of blast air needed by the blast furnace changes, the pressure of combustion-supporting air changes, and the heat storage quantity of the hot blast stove is abundant, so the purposes of saving energy and optimizing the operation of the hot blast stove cannot be achieved, therefore, the hot blast stove automatic combustion system which is suitable for the actual condition of China and needs low cost and convenient popularization needs to be developed in order to face the actual condition of operation, automation and maintenance level of China, meanwhile, the heating and combustion are uneven.
Because the enthalpy change of blast furnace gas mainly combusted by the hot blast furnace is very large and the gas pressure fluctuates frequently, most of the current domestic hot blast furnace combustion processes of the blast furnace are manually and directly operated at a valve position of a coal construction period to combust the blast furnace, the combustion effect completely depends on the technical proficiency and the diligence of an operator, the air temperature is further improved or the gas consumption is saved under the condition of not greatly changing the process, the current control system and manual operation are influenced by human factors and the like, and the purposes of realizing the optimal proportioning at any time and optimizing the combustion furnace cannot be achieved.
The traditional hot blast stove operation control mode at present has the following defects: the manual operation wastes coal gas, and due to the fact that the randomness of the manual operation is large, the adjustment of the coal gas and the air flow is not timely, and the proportion is unreasonable, the coal gas is wasted, and the combustion temperature is low; the safety is poor, the gas detonation phenomenon often occurs due to unreasonable operation, the hot blast stove masonry is damaged, and when field equipment fails, the vault temperature and the waste gas temperature are easy to exceed the standard, so that the safety of the hot blast stove is damaged; the hot blast stove has large working fluctuation and causes certain influence on a blast furnace and a gas pipe network; the invention relates to a control system and a control method for a high-efficiency combustion hot blast stove, which are used for optimizing the problems.
Disclosure of Invention
The invention mainly aims to provide a control system and a control method of a high-efficiency combustion hot blast stove, after a combustion process enters a stable state, a fuzzy control method is adopted, the system starts the control of the combustion rhythm of the hot blast stove, the fuel supply is quickly corrected by an air-fuel ratio calculation and correction module according to the difference value and the change rate of the actual rising value of data acquired by a residual oxygen acquisition module and a temperature acquisition module in a sampling period and the initially calculated standard rising value, the inner circulation control is carried out by a PID (proportion integration differentiation) regulation and control module group, the control completely imitates the judgment and the operation of a person on the combustion speed, the control of the combustion speed of the hot blast stove is automatically realized, the control effect is very obvious, the average air temperature is improved to realize the coke ratio of cultivated land or save coal gas to further reduce energy consumption.
The purpose of the invention can be achieved by adopting the following technical scheme:
the high-efficiency combustion hot blast stove control system comprises a combustion intelligent control system, an acquisition module group, an opening degree adjusting group, a boiler fuzzy control module, a gas flow, PID (proportion integration differentiation) adjusting module group, a gas flow fuzzy control and expert rule calculation module, an air-fuel ratio calculation and correction module, a stove pressure, a multiplier and a division module;
the intelligent combustion control system comprises: the intelligent control system is used for intelligently controlling the combustion of the hot blast stove, and obtaining the information of the boiler fuzzy control module to adjust through the opening adjusting group;
the acquisition module group: the system comprises a furnace fuzzy control module, a calculation module, an air-fuel ratio calculation and correction module, a PID (proportion integration differentiation) regulation and control module group, a furnace pressure and nozzle smoke temperature data and a control module group, wherein the furnace pressure and nozzle smoke temperature data are respectively sent to the furnace fuzzy control module, the calculation module, the air-fuel ratio calculation and correction module and the PID regulation and control module group;
the opening degree adjusting group comprises: the opening degree of the soot and the empty smoke is adjusted;
the boiler fuzzy control module is as follows: the device is used for acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening degree regulation control of soot and empty smoke;
the PID regulation module group: the intelligent combustion control system is used for acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow and sending the regulation and control data to the intelligent combustion control system;
the coal gas flow fuzzy control and expert rule calculation module: the system is used for controlling the gas flow by acquiring the data and the furnace pressure provided by the post-calculation module and sending the control data to the PID control module group through the multiplier;
the air-fuel ratio calculation correction module: and the system is used for calculating and correcting the acquired residual oxygen data and the data provided by the division module and then sending the corrected data to the PID regulation and control module group through the multiplier.
Preferably, the collection module group comprises a temperature collection module, a residual oxygen collection module, a flow collection module, a furnace pressure collection module and a burner smoke temperature collection module;
the temperature acquisition module: the device is used for collecting the combustion temperature and outputting the collected data;
the residual oxygen collection module: the oxygen sensor is used for collecting residual oxygen data and outputting the collected data;
the flow acquisition module: the system is used for acquiring flow and outputting acquired data;
the furnace pressure acquisition module: the furnace pressure acquisition device is used for acquiring furnace pressure and outputting acquired data;
the burner smoke temperature acquisition module: the burner gas temperature acquisition device is used for acquiring the burner gas temperature and outputting the acquired data.
Preferably, the opening degree adjusting group comprises soot opening degree adjustment and idle smoke opening degree adjustment;
adjusting the opening degree of the soot: the opening degree of the soot is adjusted;
and (3) adjusting the opening degree of the empty smoke: the opening degree of the empty smoke is adjusted.
Preferably, the PID regulating and controlling module group includes a PID air flow regulating module and a PID gas flow control module;
the PID air flow adjustment module: the system is used for carrying out air flow regulation in a PID mode and sending regulation data to the intelligent combustion control system;
the PID gas flow control module: and the intelligent control system is used for controlling the gas flow in the PID mode and sending control data to the intelligent combustion control system.
Preferably, the flow acquisition module transmits data to the PID air flow control module and the PID gas flow control module respectively, and the gas pressure transmits the data to the PID gas flow control module.
Preferably, the gas flow fuzzy control and expert rule calculation module sends data to the PID gas flow regulation module through a multiplier, and the gas flow fuzzy control and expert rule calculation module directly sends data to the PID gas flow control module.
The control method of the high-efficiency combustion hot blast stove comprises the following steps:
step 1: data are acquired through a temperature acquisition module, a residual oxygen acquisition module, a flow acquisition module, a furnace pressure acquisition module and a burner smoke temperature acquisition module respectively;
step 2: respectively sending data of the furnace pressure and the burner smoke temperature to a boiler fuzzy control module, and sending data of the temperature to a calculation module;
and step 3: sending the residual oxygen data to an air-fuel ratio calculation and correction module, and sending the flow data to a PID (proportion integration differentiation) regulation and control module group;
and 4, step 4: the acquired data and the furnace pressure provided by the post-calculation module are used for controlling the gas flow and sending the control data to the PID control module group through the multiplier;
and 5: obtaining residual oxygen data and data provided by a division module, calculating and correcting the residual oxygen data and the data, and sending the residual oxygen data and the data to a PID (proportion integration differentiation) regulation and control module group through a multiplier;
step 6: acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow, and sending the regulation and control data to an intelligent combustion control system;
and 7: acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening adjustment control of the soot and the empty smoke.
The invention has the beneficial technical effects that:
the invention provides a high-efficiency combustion hot blast stove control system and a control method, after a combustion process enters a stable state, a fuzzy control method is adopted, the system starts the control of the combustion rhythm of the hot blast stove, the fuel supply is quickly corrected by an air-fuel ratio calculation correction module according to the difference value and the change rate of the actual rising value of data acquired by a residual oxygen acquisition module and a temperature acquisition module in a sampling period and the initially calculated standard rising value, the internal circulation control is carried out by a PID (proportion integration differentiation) regulation module group, the control completely imitates the judgment and operation of a human on the combustion speed, the control of the combustion speed of the hot blast stove is automatically realized, the control effect is very obvious, the average air temperature is improved to realize the coke ratio of cultivated land or save coal gas to further reduce energy consumption.
Drawings
FIG. 1 is a system diagram of a preferred embodiment of a high efficiency combustion hot blast stove control system and method in accordance with the present invention.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, the high-efficiency combustion hot-blast stove control system provided in this embodiment includes an intelligent combustion control system, an acquisition module group, an opening degree adjustment group, a boiler fuzzy control module, a gas flow, PID adjustment module group, a gas flow fuzzy control and expert rule calculation module, an air-fuel ratio calculation and correction module, a stove pressure, a multiplier, and a division module;
the intelligent combustion control system comprises: the intelligent control system is used for intelligently controlling the combustion of the hot blast stove, and obtaining the information of the boiler fuzzy control module to adjust through the opening adjusting group;
the acquisition module group: the system comprises a furnace fuzzy control module, a calculation module, an air-fuel ratio calculation and correction module, a PID (proportion integration differentiation) regulation and control module group, a furnace pressure and nozzle smoke temperature data and a control module group, wherein the furnace pressure and nozzle smoke temperature data are respectively sent to the furnace fuzzy control module, the calculation module, the air-fuel ratio calculation and correction module and the PID regulation and control module group;
the opening degree adjusting group comprises: the opening degree of the soot and the empty smoke is adjusted;
the boiler fuzzy control module is as follows: the device is used for acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening degree regulation control of soot and empty smoke;
the PID regulation module group: the intelligent combustion control system is used for acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow and sending the regulation and control data to the intelligent combustion control system;
the coal gas flow fuzzy control and expert rule calculation module: the system is used for controlling the gas flow by acquiring the data and the furnace pressure provided by the post-calculation module and sending the control data to the PID control module group through the multiplier;
the air-fuel ratio calculation correction module: and the system is used for calculating and correcting the acquired residual oxygen data and the data provided by the division module and then sending the corrected data to the PID regulation and control module group through the multiplier.
Respectively collecting data through a temperature collecting module, a residual oxygen collecting module, a flow collecting module, a furnace pressure collecting module and a burner smoke temperature collecting module, respectively sending the data of the furnace pressure and the burner smoke temperature to a boiler fuzzy control module, sending the data of the temperature to a dividing module, sending the residual oxygen data to an air-fuel ratio calculation and correction module, sending the flow data to a PID regulation and control module group, carrying out gas flow control processing on the data and the furnace pressure provided by the dividing module after obtaining, sending the control data to the PID regulation and control module group through a multiplier, sending the obtained residual oxygen data and the data provided by the dividing module to the PID regulation and control module group through the multiplier after carrying out calculation and correction, obtaining the flow data, the gas flow fuzzy control and expert rule calculating module data, the air-fuel ratio calculation and correction module data, carrying out air flow regulation and gas flow control on the gas pressure and sending the regulation and control data to a combustion intelligent control system, acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening adjustment control of the soot and the empty smoke.
In this embodiment, the collection module group includes a temperature collection module, a residual oxygen collection module, a flow collection module, a furnace pressure collection module, and a burner smoke temperature collection module;
the temperature acquisition module: the device is used for collecting the combustion temperature and outputting the collected data;
the residual oxygen collection module: the oxygen sensor is used for collecting residual oxygen data and outputting the collected data;
the flow acquisition module: the system is used for acquiring flow and outputting acquired data;
the furnace pressure acquisition module: the furnace pressure acquisition device is used for acquiring furnace pressure and outputting acquired data;
the burner smoke temperature acquisition module: the burner gas temperature acquisition device is used for acquiring the burner gas temperature and outputting the acquired data.
In the embodiment, the opening degree adjusting group comprises soot opening degree adjustment and idle smoke opening degree adjustment;
adjusting the opening degree of the soot: the opening degree of the soot is adjusted;
and (3) adjusting the opening degree of the empty smoke: the opening degree of the empty smoke is adjusted.
In this embodiment, the PID control module group includes a PID air flow rate control module and a PID gas flow rate control module;
the PID air flow adjustment module: the system is used for carrying out air flow regulation in a PID mode and sending regulation data to the intelligent combustion control system;
the PID gas flow control module: and the intelligent control system is used for controlling the gas flow in the PID mode and sending control data to the intelligent combustion control system.
In this embodiment, the flow collection module transmits data to the PID air flow control module and the PID gas flow control module, respectively, and the gas pressure transmits the data to the PID gas flow control module.
In this embodiment, the gas flow fuzzy control and expert rule calculation module sends data to the PID air flow adjustment module through a multiplier, and the gas flow fuzzy control and expert rule calculation module directly sends data to the PID gas flow control module.
The control method of the high-efficiency combustion hot blast stove comprises the following steps:
step 1: data are acquired through a temperature acquisition module, a residual oxygen acquisition module, a flow acquisition module, a furnace pressure acquisition module and a burner smoke temperature acquisition module respectively;
step 2: respectively sending data of the furnace pressure and the burner smoke temperature to a boiler fuzzy control module, and sending data of the temperature to a calculation module;
and step 3: sending the residual oxygen data to an air-fuel ratio calculation and correction module, and sending the flow data to a PID (proportion integration differentiation) regulation and control module group;
and 4, step 4: the acquired data and the furnace pressure provided by the post-calculation module are used for controlling the gas flow and sending the control data to the PID control module group through the multiplier;
and 5: obtaining residual oxygen data and data provided by a division module, calculating and correcting the residual oxygen data and the data, and sending the residual oxygen data and the data to a PID (proportion integration differentiation) regulation and control module group through a multiplier;
step 6: acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow, and sending the regulation and control data to an intelligent combustion control system;
and 7: acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening adjustment control of the soot and the empty smoke.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (7)
1. High efficiency burning hot-blast furnace control system, its characterized in that: the system comprises a combustion intelligent control system, an acquisition module group, an opening degree adjusting group, a boiler fuzzy control module, a gas flow, PID adjusting module group, a gas flow fuzzy control and expert rule calculating module, an air-fuel ratio calculating and correcting module, a furnace pressure, a multiplying unit and a calculating module;
the intelligent combustion control system comprises: the intelligent control system is used for intelligently controlling the combustion of the hot blast stove, and obtaining the information of the boiler fuzzy control module to adjust through the opening adjusting group;
the acquisition module group: the system comprises a furnace fuzzy control module, a calculation module, an air-fuel ratio calculation and correction module, a PID (proportion integration differentiation) regulation and control module group, a furnace pressure and nozzle smoke temperature data and a control module group, wherein the furnace pressure and nozzle smoke temperature data are respectively sent to the furnace fuzzy control module, the calculation module, the air-fuel ratio calculation and correction module and the PID regulation and control module group;
the opening degree adjusting group comprises: the opening degree of the soot and the empty smoke is adjusted;
the boiler fuzzy control module is as follows: the device is used for acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening degree regulation control of soot and empty smoke;
the PID regulation module group: the intelligent combustion control system is used for acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow and sending the regulation and control data to the intelligent combustion control system;
the coal gas flow fuzzy control and expert rule calculation module: the system is used for controlling the gas flow by acquiring the data and the furnace pressure provided by the post-calculation module and sending the control data to the PID control module group through the multiplier;
the air-fuel ratio calculation correction module: and the system is used for calculating and correcting the acquired residual oxygen data and the data provided by the division module and then sending the corrected data to the PID regulation and control module group through the multiplier.
2. The high efficiency combustion stove control system according to claim 1, characterized in that: the collection module group comprises a temperature collection module, a residual oxygen collection module, a flow collection module, a furnace pressure collection module and a burner smoke temperature collection module;
the temperature acquisition module: the device is used for collecting the combustion temperature and outputting the collected data;
the residual oxygen collection module: the oxygen sensor is used for collecting residual oxygen data and outputting the collected data;
the flow acquisition module: the system is used for acquiring flow and outputting acquired data;
the furnace pressure acquisition module: the furnace pressure acquisition device is used for acquiring furnace pressure and outputting acquired data;
the burner smoke temperature acquisition module: the burner gas temperature acquisition device is used for acquiring the burner gas temperature and outputting the acquired data.
3. The high efficiency combustion stove control system according to claim 1, characterized in that: the opening degree adjusting group comprises soot opening degree adjustment and empty smoke opening degree adjustment;
adjusting the opening degree of the soot: the opening degree of the soot is adjusted;
and (3) adjusting the opening degree of the empty smoke: the opening degree of the empty smoke is adjusted.
4. The high efficiency combustion stove control system according to claim 2, characterized in that: the PID regulating and controlling module group comprises a PID air flow regulating module and a PID coal gas flow control module;
the PID air flow adjustment module: the system is used for carrying out air flow regulation in a PID mode and sending regulation data to the intelligent combustion control system;
the PID gas flow control module: and the intelligent control system is used for controlling the gas flow in the PID mode and sending control data to the intelligent combustion control system.
5. The high efficiency combustion stove control system according to claim 4, characterized in that: the flow acquisition module respectively transmits data to the PID air flow regulation module and the PID coal gas flow control module, and the coal gas pressure transmits the data to the PID coal gas flow control module.
6. The high efficiency combustion stove control system according to claim 4, characterized in that: the gas flow fuzzy control and expert rule calculation module sends data to the PID air flow regulation module through a multiplier, and the gas flow fuzzy control and expert rule calculation module directly sends the data to the PID gas flow control module.
7. The control method of the high-efficiency combustion hot blast stove is characterized by comprising the following steps: the method comprises the following steps:
step 1: data are acquired through a temperature acquisition module, a residual oxygen acquisition module, a flow acquisition module, a furnace pressure acquisition module and a burner smoke temperature acquisition module respectively;
step 2: respectively sending data of the furnace pressure and the burner smoke temperature to a boiler fuzzy control module, and sending data of the temperature to a calculation module;
and step 3: sending the residual oxygen data to an air-fuel ratio calculation and correction module, and sending the flow data to a PID (proportion integration differentiation) regulation and control module group;
and 4, step 4: the acquired data and the furnace pressure provided by the post-calculation module are used for controlling the gas flow and sending the control data to the PID control module group through the multiplier;
and 5: obtaining residual oxygen data and data provided by a division module, calculating and correcting the residual oxygen data and the data, and sending the residual oxygen data and the data to a PID (proportion integration differentiation) regulation and control module group through a multiplier;
step 6: acquiring flow data, fuzzy control of gas flow and expert rule calculation module data, calculation and correction module data of air-fuel ratio and gas pressure to regulate air flow and control gas flow, and sending the regulation and control data to an intelligent combustion control system;
and 7: acquiring data of furnace pressure, burner smoke temperature and gas flow, analyzing and calculating according to the acquired data, and outputting opening adjustment control of the soot and the empty smoke.
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| CN113549725A (en) * | 2021-06-23 | 2021-10-26 | 首钢集团有限公司 | Hot blast stove system control method, device, equipment and medium |
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