CN107131519B - A kind of combusted proportion Optimal Control System and method - Google Patents
A kind of combusted proportion Optimal Control System and method Download PDFInfo
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- CN107131519B CN107131519B CN201710255855.2A CN201710255855A CN107131519B CN 107131519 B CN107131519 B CN 107131519B CN 201710255855 A CN201710255855 A CN 201710255855A CN 107131519 B CN107131519 B CN 107131519B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/26—Details
- F23N5/265—Details using electronic means
Abstract
It includes: temperature sensor that the present invention, which discloses a kind of combusted proportion Optimal Control System and method, the system, for the temperature in real-time detection combustion furnace；Oxygen sensor, for the oxygen content in real-time detection combustion furnace；Air shut-off valve, for controlling the air mass flow entered in combustion furnace；Gas control valve, for controlling the gas flow entered in combustion furnace；Controller, it is connect respectively with temperature sensor, oxygen sensor, air shut-off valve and gas control valve, the real time temperature and real-time oxygen amount that temperature sensor and oxygen sensor will test respectively are sent to controller, controller compares and analyzes, and forms air control signal and combustion gas control signal is sent respectively to air shut-off valve and gas control valve.The present invention effectively can carry out effective monitoring and adjusting to the air-fuel ratio in combustion process, and sufficiently, the thermal efficiency is high for burning.
Description
Technical field
The present invention relates to a kind of combustion control systems, and in particular to a kind of combusted proportion Optimal Control System and method.
Background technique
Burning realizes that ideal burning is the target that all combustion control systems are most asked in proportion.However existing some burnings
The air-fuel ratio of control system is not carried out closed-loop control, i.e., the oxygen content in real process is fed back to sky by no oxygen amount sensor
Combustion causes the effect of control poor than control loop.Although and some high-end control systems are provided with oxygen amount sensor, control
Using manually controlling, adjustment process is complicated in circuit processed, and control effect is bad.
Summary of the invention
In order to solve the above-mentioned technical problem, the invention proposes a kind of combusted proportion Optimal Control System and methods, just
In control and regulation, effective monitoring and adjusting effectively can be carried out to the air-fuel ratio in combustion process.
In order to achieve the above object, technical scheme is as follows:
A kind of combusted proportion Optimal Control System includes: temperature sensor, for the temperature in real-time detection combustion furnace；Oxygen
Gas sensor, for the oxygen content in real-time detection combustion furnace；Air shut-off valve, for controlling the air entered in combustion furnace
Flow；Gas control valve, for controlling the gas flow entered in combustion furnace；Controller is passed with temperature sensor, oxygen respectively
Sensor, air shut-off valve are connected with gas control valve, the real-time temperature that temperature sensor and oxygen sensor will test respectively
Degree and real-time oxygen amount are sent to controller, and controller compares and analyzes, and form air control signal and combustion gas control signal point
Air shut-off valve and gas control valve are not sent to it.
A kind of combusted proportion Optimal Control System of the present invention is conducive to temperature sensor and oxygen sensor real-time detection is burnt
Temperature and oxygen content in furnace, controller are analyzed and are calculated, controlled air shut-off valve and gas control valve.Hair
Bright structure is simple, and it is convenient to operate, in the process of implementation, without manually being intervened.
Based on the above technical solution, following improvement can also be done:
As a preferred option, further include carbon monoxide transducer, contain for the carbon monoxide in real-time detection combustion furnace
Amount.
Using the above preferred scheme, carbon monoxide transducer can effectively detect the efficiency burnt in combustion furnace.
It as a preferred option, further include warning device, warning device is connect with controller.
Using the above preferred scheme, the security performance of system entirety is improved.
As a preferred option, warning device is buzzer and/or indicator light, and the buzzer of different danger classes is named
Sound is different, and the frequency difference of the indicator light flashing of different danger classes or the color of indicator light are different.
Using the above preferred scheme, the security performance of system entirety is improved, operator adopt according to specific situation
Take corresponding measure.
As a preferred option, time set is equipped in controller.
Using the above preferred scheme, time set carries out delay judgement, greatly gentle control process, avoid due to
Detection error makees meaningless variation.
A kind of combusted proportion optimal control method, is controlled using combusted proportion Optimal Control System, specifically include with
Lower step:
1) the real time temperature PV that controller detects temperature sensorTempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
Otherwise, controller analyzes the real-time oxygen amount that oxygen sensor detects；
2) controller is to real time temperature PVTempWith set temperature SPTempAnalysis of Temperature Control is carried out, the real time temperature is formed
Under setting air amount SPAir；
3) pass through the available real-time air capacity PV into combustion furnace of air shut-off valveAir, controller is to setting air
Measure SPAirWith real-time air capacity PVAirAir flow control analysis is carried out, air control signal is formed and is sent to air shut-off valve,
Air shut-off valve controls the air mass flow for entering combustion furnace；
4) the real-time oxygen amount PV that controller detects oxygen sensorO2With setting oxygen amount SPO2The control analysis of carry out ratio,
Form real-time ratio of combustion OUTRatio；
5) controller is to real-time air capacity PVAirWith real-time ratio of combustion OUTRatioCalculation processing is carried out, setting gas quantity is formed
SPGas；
6) pass through the available real-time gas quantity PV into combustion furnace of gas control valveGas, controller is to setting combustion gas
Amount and real-time gas quantity PVGasGas flow control analysis is carried out, combustion gas control signal is formed and is sent to gas control valve, combustion gas
Control valve controls the gas flow for entering combustion furnace.
A kind of combusted proportion optimal control method of the present invention uses closed-loop control system, optimizes control to combusted proportion
System guarantees the stable operation of entire combustion system, while each relevant parameter is in optimum proportioning state, and burning is abundant, the thermal efficiency
Height meets production requirement with the smallest energy consumption.
As a preferred option, in step 5), SPGas=PVAir/OUTRatio。
Using the above preferred scheme, parameter setting is reasonable.
As a preferred option, step 1) specifically includes the following steps:
1.1) the real time temperature PV that controller detects temperature sensorTempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
1.2) otherwise, the real-time oxygen amount PV that controller detects oxygen sensorO2It is analyzed, judges real-time oxygen amount PVO2
With setting oxygen amount SPO2Oxygen amount difference whether be greater than tolerance value,
If more than then reentering step 1.1)；
1.3) carbon monoxide content that otherwise, controller detects carbon monoxide transducer is analyzed, and judges an oxidation
It is more than setting time that whether carbon content, which is persistently greater than tolerance value,
If being more than, at regular intervals, set temperature SPTempIncrease by 1 degree, is more than warning device alarm after the upper limit, so
After reenter step 1.2)；
1.4) otherwise, then at regular intervals, set temperature SPTemp1 degree is reduced, is more than warning device alarm after lower limit,
Then step 1.2) is reentered.
Using the above preferred scheme, the carbon monoxide content in combustion furnace is detected, to obtain in combustion furnace
Efficiency of combustion illustrates burn incompletely if carbon monoxide content is too high, modifies set temperature, is modified.
As a preferred option, in step 1.3), setting time 60s.
Using the above preferred scheme, 60s delay judgement judges more accurate.
As a preferred option, in step 1.3) and step 1.4), every 5 minutes, set temperature SPTempIncrease or drops
Low 1 degree.
Using the above preferred scheme, 5 minutes interval times, more rationally.
Detailed description of the invention
Fig. 1 is a kind of one of structural schematic diagram of combusted proportion Optimal Control System provided in an embodiment of the present invention.
Fig. 2 is a kind of flow chart of combusted proportion optimal control method provided in an embodiment of the present invention.
Fig. 3 is a kind of second structural representation of combusted proportion Optimal Control System provided in an embodiment of the present invention.
Wherein: 1 temperature sensor, 2 oxygen sensors, 3 air shut-off valves, 4 gas control valves, 5 controllers, 6 one oxidations
Carbon sensor, 7 warning devices.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
In order to reach the purpose of the present invention, some of embodiments of a kind of combusted proportion Optimal Control System and method
In,
As shown in Figure 1, a kind of combusted proportion Optimal Control System includes: temperature sensor 1, oxygen sensor 2, air control
Valve 3, gas control valve 4 and controller 5 processed.
Temperature sensor 1 is for the temperature in real-time detection combustion furnace；Oxygen sensor 2 is in real-time detection combustion furnace
Oxygen content；Air shut-off valve 3 is used to control the air mass flow entered in combustion furnace；Gas control valve 4 enters for controlling
Gas flow in combustion furnace.
Controller 5 is connect with temperature sensor 1, oxygen sensor 2, air shut-off valve 3 and gas control valve 4 respectively, temperature
The real time temperature and real-time oxygen amount that degree sensor 1 and oxygen sensor 2 will test respectively are sent to controller 5, controller 5
It compares and analyzes, forms air control signal and combustion gas control signal is sent respectively to air shut-off valve 3 and gas control valve
4。
As shown in Fig. 2, a kind of combusted proportion optimal control method, is controlled using combusted proportion Optimal Control System,
Specifically includes the following steps:
1) the real time temperature PV that controller 5 detects temperature sensor 1TempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
Otherwise, the real-time oxygen amount that controller 5 detects oxygen sensor 2 is analyzed；
2) controller 5 is to real time temperature PVTempWith set temperature SPTempAnalysis of Temperature Control is carried out, the real time temperature is formed
Under setting air amount SPAir；
3) pass through the available real-time air capacity PV into combustion furnace of air shut-off valve 3Air, 5 pairs of settings skies of controller
Tolerance SPAirWith real-time air capacity PVAirAir flow control analysis is carried out, air control signal is formed and is sent to air shut-off valve
3,3 pairs of the air shut-off valve air mass flows for entering combustion furnace control；
4) the real-time oxygen amount PV that controller 5 detects oxygen sensor 2O2With setting oxygen amount SPO2The control point of carry out ratio
Analysis, forms real-time ratio of combustion OUTRatio；
5) controller 5 is to real-time air capacity PVAirWith real-time ratio of combustion OUTRatioCalculation processing is carried out, setting combustion gas is formed
Measure SPGas, SPGas=PVAir/OUTRatio；
6) pass through the available real-time gas quantity PV into combustion furnace of gas control valve 4Gas, 5 pairs of setting combustions of controller
Tolerance and real-time gas quantity PVGasGas flow control analysis is carried out, combustion gas control signal is formed and is sent to gas control valve 4, fire
4 pairs of the gas control valve gas flows for entering combustion furnace control.
A kind of combusted proportion Optimal Control System of the present invention and method are conducive to temperature sensor 1 and oxygen sensor 2 is real-time
Temperature and oxygen content, controller 5 in detection combustion furnace are analyzed and are calculated, to air shut-off valve 3 and gas control valve 4
It is controlled.
It has the advantages that
First, structure is simple, and it is convenient to operate, in the process of implementation, without manually being intervened.
Second, using closed-loop control system, control is optimized to combusted proportion, guarantees the stable fortune of entire combustion system
Row, while each relevant parameter is in optimum proportioning state, sufficiently, the thermal efficiency is high for burning, is met with the smallest energy consumption and is produced
Demand.
Third, when there is no when variation, control loop does not adjust, and only analyzes oxygen content, and adjusting is more for temperature
It is convenient.
As shown in figure 3, in order to further optimize implementation result of the invention, in other embodiment, remaining
Feature technology is identical, the difference is that, combusted proportion Optimal Control System further includes carbon monoxide transducer 6 and warning device
7, carbon monoxide transducer 6 is connect for the carbon monoxide content in real-time detection combustion furnace, warning device 7 with controller 5.Control
Time set is equipped in device 5 processed.
As shown in Fig. 2, in a kind of combusted proportion optimal control method step 1) specifically includes the following steps:
1.1) the real time temperature PV that controller 5 detects temperature sensor 1TempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
1.2) otherwise, the real-time oxygen amount PV that controller 5 detects oxygen sensor 2O2It is analyzed, judges real-time oxygen amount
PVO2With setting oxygen amount SPO2Oxygen amount difference whether be greater than tolerance value,
If more than then reentering step 1.1)；
1.3) carbon monoxide content that otherwise, controller 5 detects carbon monoxide transducer 6 is analyzed, and judges an oxygen
Changing carbon content whether to be persistently greater than tolerance value is more than 60s,
If being more than, every 5 minutes, set temperature SPTempIncrease by 1 degree, is more than after the upper limit, warning device 7 is alarmed, then
Reenter step 1.2)；
1.4) otherwise, then every 5 minutes, set temperature SPTemp1 degree is reduced, is more than after lower limit, warning device 7 is alarmed, so
After reenter step 1.2).
Using the above preferred scheme, the carbon monoxide content in combustion furnace is detected, to obtain in combustion furnace
Efficiency of combustion illustrates burn incompletely if carbon monoxide content is too high, modifies set temperature, is modified.Time set into
Line delay judgement, greatly gentle control process avoid making meaningless variation due to detection error.
Further, above-mentioned is in embodiment, and warning device 7 is buzzer and/or indicator light, the bee of different danger classes
The cry of ring device is different, and the frequency difference of the indicator light flashing of different danger classes or the color of indicator light are different.
Using the above preferred scheme, the security performance of system entirety is improved, operator adopt according to specific situation
Take corresponding measure.
In order to further optimize implementation result of the invention, in other embodiment, remaining feature technology phase
Together, the difference is that, in order to improve the precision of measurement, real-time air capacity can be measured using individual air borne sensor
PVAir, real-time gas quantity PV is measured using individual gas securityGas。
The above are merely the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art,
Without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (7)
1. a kind of combusted proportion Optimal Control System characterized by comprising
Temperature sensor, for the temperature in real-time detection combustion furnace；
Oxygen sensor, for the oxygen content in real-time detection combustion furnace；
Carbon monoxide transducer, for the carbon monoxide content in real-time detection combustion furnace；
Air shut-off valve, for controlling the air mass flow entered in combustion furnace；
Gas control valve, for controlling the gas flow entered in combustion furnace；
Controller, respectively with the temperature sensor, the oxygen sensor, the air shut-off valve and the gas control valve
Connection, the real time temperature and real-time oxygen amount that the temperature sensor and the oxygen sensor will test respectively are sent to institute
State controller, the controller compares and analyzes, form air control signal and combustion gas control signal be sent respectively to it is described
Air shut-off valve and the gas control valve；
Warning device, the warning device are connect with the controller；
The combusted proportion Optimal Control System is controlled using following combusted proportion optimal control methods, is specifically included following
Step:
1) step 1) specifically:
1.1) the real time temperature PV that the controller detects temperature sensorTempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
1.2) otherwise, the real-time oxygen amount PV that the controller detects the oxygen sensorO2It is analyzed, judges real-time oxygen amount
PVO2With setting oxygen amount SPO2Oxygen amount difference whether be greater than tolerance value,
If more than then reentering step 1.1)；
1.3) carbon monoxide content that otherwise, the controller detects the carbon monoxide transducer is analyzed, and judges one
It is more than setting time that whether content of carbon oxide, which is persistently greater than tolerance value,
If being more than, at regular intervals, set temperature SPTempIncrease by 1 degree, is more than after the upper limit, then warning device alarm weighs
Newly enter step 1.2)；
1.4) otherwise, then at regular intervals, set temperature SPTemp1 degree is reduced, is more than the warning device alarm after lower limit,
Then step 1.2) is reentered；
2) controller is to real time temperature PVTempWith set temperature SPTempAnalysis of Temperature Control is carried out, the real time temperature is formed
Under setting air amount SPAir；
3) pass through the available real-time air capacity PV into combustion furnace of the air shut-off valveAir, the controller is to setting
Air capacity SPAirWith real-time air capacity PVAirAir flow control analysis is carried out, air control signal is formed and is sent to the air
Control valve, the air shut-off valve control the air mass flow for entering combustion furnace；
4) the real-time oxygen amount PV that the controller detects the oxygen sensorO2With setting oxygen amount SPO2The control point of carry out ratio
Analysis, forms real-time ratio of combustion OUTRatio；
5) controller is to real-time air capacity PVAirWith real-time ratio of combustion OUTRatioCalculation processing is carried out, setting gas quantity is formed
SPGas；
6) pass through the available real-time gas quantity PV into combustion furnace of the gas control valveGas, the controller is to setting
Gas quantity and real-time gas quantity PVGasGas flow control analysis is carried out, combustion gas control signal is formed and is sent to the combustion gas control
Valve, the gas control valve control the gas flow for entering combustion furnace.
2. combusted proportion Optimal Control System according to claim 1, which is characterized in that the warning device is buzzer
And/or indicator light, the cry of the buzzer of different danger classes is different, and the frequency of the indicator light flashing of different danger classes is not
Same or indicator light color is different.
3. combusted proportion Optimal Control System according to claim 1 or 2, which is characterized in that be equipped in the controller
Time set.
4. a kind of combusted proportion optimal control method, which is characterized in that utilize ratio of combustion as described in any one of claims 1-3
Example Optimal Control System is controlled, specifically includes the following steps:
1) step 1) specifically:
1.1) the real time temperature PV that controller detects temperature sensorTempWith set temperature SPTempIt compares,
If the temperature difference of the two is greater than tolerance value, enter step 2)；
1.2) otherwise, the real-time oxygen amount PV that controller detects oxygen sensorO2It is analyzed, judges real-time oxygen amount PVO2With set
Determine oxygen amount SPO2Oxygen amount difference whether be greater than tolerance value,
If more than then reentering step 1.1)；
1.3) carbon monoxide content that otherwise, controller detects carbon monoxide transducer is analyzed, and judges that carbon monoxide contains
It is more than setting time that whether amount, which is persistently greater than tolerance value,
If being more than, at regular intervals, set temperature SPTempIncrease by 1 degree, is more than after the upper limit, then warning device alarm weighs
Newly enter step 1.2)；
1.4) otherwise, then at regular intervals, set temperature SPTemp1 degree is reduced, is more than warning device alarm after lower limit, then
Reenter step 1.2)；
2) controller is to real time temperature PVTempWith set temperature SPTempAnalysis of Temperature Control is carried out, is formed under the real time temperature
Setting air amount SPAir；
3) pass through the available real-time air capacity PV into combustion furnace of air shut-off valveAir, controller is to setting air amount
SPAirWith real-time air capacity PVAirAir flow control analysis is carried out, air control signal is formed and is sent to air shut-off valve, it is empty
Gas control valve controls the air mass flow for entering combustion furnace；
4) the real-time oxygen amount PV that controller detects oxygen sensorO2With setting oxygen amount SPO2The control analysis of carry out ratio, forms real
When ratio of combustion OUTRatio；
5) controller is to real-time air capacity PVAirWith real-time ratio of combustion OUTRatioCalculation processing is carried out, setting gas quantity is formed
SPGas；
6) pass through the available real-time gas quantity PV into combustion furnace of gas control valveGas, controller to setting gas quantity and
Real-time gas quantity PVGasGas flow control analysis is carried out, combustion gas control signal is formed and is sent to gas control valve, combustion gas control
Valve controls the gas flow for entering combustion furnace.
5. combusted proportion optimal control method according to claim 4, which is characterized in that in the step 5), SPGas=
PVAir/OUTRatio。
6. combusted proportion optimal control method according to claim 5, which is characterized in that in the step 1.3), set
It fixes time as 60s.
7. combusted proportion optimal control method according to claim 6, which is characterized in that in the step 1.3) and step
1.4) in, every 5 minutes, set temperature SPTempIncrease or decrease 1 degree.
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| CN109899829A (en) * | 2017-12-08 | 2019-06-18 | 伍育毅 | A kind of energy-saving combustion control system |
| CN109059037A (en) * | 2018-07-03 | 2018-12-21 | 安徽辰宇机械科技有限公司 | A kind of control method and its control system of hot-blast stove |
| CN110701612A (en) * | 2019-10-14 | 2020-01-17 | 中冶南方都市环保工程技术股份有限公司 | Combustion ratio optimization control device and system |
| TWI733266B (en) * | 2019-12-04 | 2021-07-11 | 財團法人金屬工業研究發展中心 | Combustion control method |
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| CN103307642A (en) * | 2013-05-31 | 2013-09-18 | 天津大学 | Heat-integrated gas furnace system and operation method |
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